The Kynix Blog

An alliance led by IBM Research today announced that it has produced the semiconductor industry's first 7nm (nanometer) node test chips with functioning transistors. The breakthrough, accomplished in partnership with GLOBALFOUNDRIES and Samsung at SUNY Polytechnic Institute's Colleges of Nanoscale Science and Engineering (SUNY Poly CNSE), could result in the ability to place more than 20 billion tiny switches—transistors—on the fingernail-sized chips that power everything from smartphones to spacecraft.To achieve the higher performance, lower power and scaling benefits promised by 7nm technology, researchers had to bypass conventional semiconductor manufacturing approaches. Among the novel processes and techniques pioneered by the IBM Research alliance were a number of industry-first innovations, most notably Silicon Germanium (SiGe) channel transistors and Extreme Ultraviolet (EUV) lithography integration at multiple levels.Industry experts consider 7nm technology crucial to meeting the anticipated demands of future cloud computing and Big Data systems, cognitive computing, mobile products and other emerging technologies. Part of IBM's $3 billion, five-year investment in chip R&D (announced in 2014), this accomplishment was made possible through a unique public-private partnership with New York State and joint development alliance with GLOBALFOUNDRIES, Samsung, and equipment suppliers. The team is based at SUNY Poly's NanoTech Complex in Albany."For business and society to get the most out of tomorrow's computers and devices, scaling to 7nm and beyond is essential," said Arvind Krishna, senior vice president and director of IBM Research. "That's why IBM has remained committed to an aggressive basic research agenda that continually pushes the limits of semiconductor technology. Working with our partners, this milestone builds on decades of research that has set the pace for the microelectronics industry, and positions us to advance our leadership for years to come."Microprocessors utilizing 22nm and 14nm technology power today's servers, cloud data centers and mobile devices, and 10nm technology is well on the way to becoming a mature technology. The IBM Research-led alliance achieved close to 50 percent area scaling improvements over today's most advanced technology, introduced SiGe channel material for transistor performance enhancement at 7nm node geometries, process innovations to stack them below 30nm pitch and full integration of EUV lithography at multiple levels. These techniques and scaling could result in at least a 50 percent power/performance improvement for next generation mainframe and POWER systems that will power the Big Data, cloud and mobile era."Governor Andrew Cuomo's trailblazing public-private partnership model is catalyzing historic innovation and advancement. Today's announcement is just one example of our collaboration with IBM, which furthers New York State's global leadership in developing next generation technologies," said Dr. Michael Liehr, SUNY Poly Executive Vice President of Innovation and Technology and Vice President of Research. "Enabling the first 7nm node transistors is a significant milestone for the entire semiconductor industry as we continue to push beyond the limitations of our current capabilities."The 7nm node milestone continues IBM's legacy of historic contributions to silicon and semiconductor innovation. They include the invention or first implementation of the single cell DRAM, the Dennard Scaling Laws, chemically amplified photoresists, copper interconnect wiring, Silicon on Insulator, strained engineering, multi core microprocessors, immersion lithography, high speed SiGe, High-k gate dielectrics, embedded DRAM, 3D chip stacking and Air gap insulators.  

Has your child swallowed a small battery? In the future, a tiny robot made from pig gut could capture it and expel it.Researchers at the Massachusetts Institute of Technology are designing an ingestible robot that could patch wounds, deliver medicine or dislodge a foreign object. They call their experiment an "origami robot" because the accordion-shaped gadget gets folded up and frozen into an ice capsule."You swallow the robot, and when it gets to your stomach the ice melts and the robot unfolds," said Daniela Rus, a professor who directs MIT's Computer Science and Artificial Intelligence Laboratory. "Then, we can direct it to a very precise location."It's still a long way before the device can be deployed in a human or animal. In the meantime, the researchers have created an artificial stomach made of silicone to test it.Rus said one of the robot's most important missions could be to save the lives of children who swallow the disc-shaped button batteries that increasingly power electronic devices. If swallowed, the battery can quickly burn through the stomach lining and be fatal.The robots could seek out and capture the battery before it causes too much damage, pushing it down through the gastrointestinal tract and out of the body.The robot's flexible frame is biodegradable, made of the same dried pig intestine used for sausage casing. The researchers scoured markets in Boston's Chinatown before finding the right material to build an agile robot body that could dissolve once its mission was accomplished."They tried rice paper and sugar paper and hydrogel paper, all sorts of different materials," Rus said. "We found that sausage casing has the best properties when it comes to folding and unfolding and controllability."Embedded in its meaty body—it wouldn't be hard to make a kosher version, Rus said—is a neodymium magnet that looks like a tiny metal cube.Magnetic forces control its movement. Researchers use remote-control joysticks to change the magnetic field, allowing the robot to slip and crawl through the stomach on the way to the object it is trying to retrieve or the wound where it must deliver drugs.Would it hurt to ingest a robot? Probably not, said research team member Steven Guitron, an MIT graduate student in mechanical engineering."I'm sure if you swallowed an ice cube accidently, it's very similar," he said.MIT's team has a patent pending and presented its research at a robotics conference in Sweden this spring. Rus said medical companies have expressed interest in clinical applications, which require going through the regulatory process of conducting animal and human studies."It's a nifty idea," but it could be a decade or so before hospitals could use such a device, said William Messner, a professor of mechanical engineering at Tufts University in Massachusetts who is not involved with the project. He said it could also have promise in performing biopsies.The U.S. Food and Drug Administration "has to get involved with anything like this and they're rightfully very careful about any kind of medical instrument," Messner said. "The big problem is: What if it gets stuck? Now you've really got a problem."The multidisciplinary project fits into the growing field of soft robotics that coalesced with the 2013 founding of the peer-reviewed Soft Robotics Journal, based at Tufts. The Boston region is a hub for research into the moving machines made of flexible materials that can change shape and size, making them useful for surgery and other complex environments.   

Research challengeElectrical harvesting is the conversion of freely available ambient energy such as vibrations into electrical power. This power can then be used to supply low-power, autonomous electronic semiconductor systems such as wireless sensor networks used in the energy, transport, aeronautical and military sectors.Energy harvesters can be used to replace batteries in wireless devices reducing the maintenance costs of replacing the millions of batteries that are thrown away each year and enabling these wireless sensors to be placed in inaccessible and hazardous locations.Research at Southampton is leading the way in developing devices that can turn these vibrations into useable energy in a cost-effective, user-friendly way.ContextIn the future energy harvesting is set to play a significant role in the powering of autonomous electronic systems and wireless sensor networks around the globe. Our solutionSouthampton’s research team has been working for more than 15 years on a solution to our growing energy needs. Since their research began they have produced the world’s first piezoelectric vibration energy harvester and high efficiency electromagnetic energy harvesters. Their work has placed them at the forefront of vibration energy harvesting research internationally.Today they continue to lead the research into realising the full potential of vibration energy harvesting.What was the impact?Southampton’s research has spearheaded the development of a multi-million pound industry and enabled large-scale deployment of wireless sensors in the rail network and other industry.In 2004 the Southampton team commercialised its research by launching the spin out company Perpetuum. The company is a global leader in vibration energy harvesting and has already attracted almost £10m in venture capital. It has developed the world’s first practical electromagnetic micro-generator that is capable of delivering enough power to transmit large amounts of data. This wireless sensor system is already monitoring the condition of bearings on hundreds of UK and European trains to improve rail safety and reduce maintenance costs. Its generators have also been used by Shell to help monitor the condition of its gas field equipment in Norway.Southampton’s research has also helped develop international standards, influenced the decisions of funding bodies and raised the profile of energy harvesting among industry and the wider public.  

Written by Rob MathesonAn exotic material called gallium nitride (GaN) is poised to become the next semiconductor for power electronics, enabling much higher efficiency than silicon.In 2013, the Department of Energy (DOE) dedicated approximately half of a $140 million research institute for power electronics to GaN research, citing its potential to reduce worldwide energy consumption. Now MIT spinout Cambridge Electronics Inc. (CEI) has announced a line of GaN transistors and power electronic circuits that promise to cut energy usage in data centers, electric cars, and consumer devices by 10 to 20 percent worldwide by 2025.Power electronics is a ubiquitous technology used to convert electricity to higher or lower voltages and different currents—such as in a laptop's power adapter, or in electric substations that convert voltages and distribute electricity to consumers. Many of these power-electronics systems rely on silicon transistors that switch on and off to regulate voltage but, due to speed and resistance constraints, waste energy as heat.CEI's GaN transistors have at least one-tenth the resistance of such silicon-based transistors, according to the company. This allows for much higher energy-efficiency, and orders-of-magnitude faster switching frequency—meaning power-electronics systems with these components can be made much smaller. CEI is using its transistors to enable power electronics that will make data centers less energy-intensive, electric cars cheaper and more powerful, and laptop power adapters one- third the size—or even small enough to fit inside the computer itself."This is a once-in-a-lifetime opportunity to change electronics and to really make an impact on how energy is used in the world," says CEI co-founder Tomás Palacios, an MIT associate professor of electrical engineering and computer science who co-invented the technology.Other co-founders and co-inventors are Anantha Chandrakasan, the Joseph F. and Nancy P. Keithley Professor in Electrical Engineering, now chair of CEI's technical advisory board; alumnus Bin Lu SM '07, PhD '13, CEI's vice president for device development; Ling Xia PhD'12, CEI's director of operations; Mohamed Azize, CEI's director of epitaxy; and Omair Saadat PhD '14, CEI's director of product reliability.Making GaN feasibleWhile GaN transistors have several benefits over silicon, safety drawbacks and expensive manufacturing methods have largely kept them off the market. But Palacios, Lu, Saadat, and other MIT researchers managed to overcome these issues through design innovations made in the late 2000s.Power transistors are designed to flow high currents when on, and to block high voltages when off. Should the circuit break or fail, the transistors must default to the "off" position to cut the current to avoid short circuits and other issues—an important feature of silicon power transistors.But GaN transistors are typically "normally on"—meaning, by default, they'll always allow a flow of current, which has historically been difficult to correct. Using resources in MIT's Microsystems Technology Laboratory, the researchers—supported by Department of Defense and DOE grants—developed GaN transistors that were "normally off" by modifying the structure of the material.To make traditional GaN transistors, scientists grow a thin layer of GaN on top of a substrate. The MIT researchers layered different materials with disparate compositions in their GaN transistors. Finding the precise mix allowed a new kind of GaN transistors that go to the off position by default."We always talk about GaN as gallium and nitrogen, but you can modify the basic GaN material, add impurities and other elements, to change its properties," Palacios says.But GaN and other nonsilicon semiconductors are also manufactured in special processes, which are expensive. To drop costs, the MIT researchers—at the Institute and, later, with the company—developed new fabrication technologies, or "process recipes," Lu says. This involved, among other things, switching out gold metals used in manufacturing GaN devices for metals that were compatible with silicon fabrication, and developing ways to deposit GaN on large wafers used by silicon foundries."Basically, we are fabricating our advanced GaN transistors and circuits in conventional silicon foundries, at the cost of silicon. The cost is the same, but the performance of the new devices is 100 times better," Lu says.Major applicationsCEI is currently using its advanced transistors to develop laptop power adaptors that are approximately 1.5 cubic inches in diameter—the smallest ever made.Among the other feasible applications for the transistors, Palacios says, is better power electronics for data centers run by Google, Amazon, Facebook, and other companies, to power the cloud.Currently, these data centers eat up about 2 percent of electricity in the United States. But GaN-based power electronics, Palacios says, could save a very significant fraction of that.Another major future application, Palacios adds, will be replacing the silicon-based power electronics in electric cars. These are in the chargers that charge the battery, and the inverters that convert the battery power to drive the electric motors. The silicon transistors used today have a constrained power capability that limits how much power the car can handle. This is one of the main reasons why there are few large electric vehicles.GaN-based power electronics, on the other hand, could boost power output for electric cars, while making them more energy-efficient and lighter—and, therefore, cheaper and capable of driving longer distances. "Electric vehicles are popular, but still a niche product. GaN power electronics will be key to make them mainstream," Palacios says.Innovative ideasIn launching CEI, the MIT founders turned to the Institute's entrepreneurial programs, which contributed to the startup's progress. "MIT's innovation and entrepreneurial ecosystem has been key to get things moving and to the point where we are now," Palacios says.Palacios first earned a grant from the Deshpande Center for Technological Innovation to launch CEI. Afterward, he took his idea for GaN-based power electronics to Innovation Teams (i-Teams), which brings together MIT students from across disciplines to evaluate the commercial feasibility of new technologies. That program, he says, showed him the huge market pull for GaN power electronics, and helped CEI settle on its first products."Many times, it's the other way around: You come out with an amazing technology looking for an application. In this case, thanks to i-Teams, we found there were many applications looking for this technology," Palacios says.For Lu, a key element for growing CEI was auditing Start6, a workshop hosted by the Department of Electrical Engineering and Computer Science, where entrepreneurial engineering students are guided through the startup process with group discussions and talks from seasoned entrepreneurs. Among other things, Lu gained perspective on dividing equity, funding, building a team, and other early startup challenges."It's a great class for a student who has an idea, but doesn't know exactly what's going on in business," Lu says. "It's kind of an overview of what the process is going to be like, so when you start your own company you are ready."   

The integrated circuit is abbreviated as IC. As the name suggests, an integrated circuit is a circuit with a specific function that integrates a certain number of commonly used electronic components, such as resistors, capacitors, transistors, etc., and the connections between these components through a semiconductor process.Integrated circuits have the advantages of small size, light weight, fewer lead wires and soldering points, long life, high reliability, and good performance. At the same time, they have low cost and are convenient for mass production. They are not only widely used in industrial and consumer electronic equipment such as audio players, televisions, computers, and smartphones, but also in military, communications, automotive, and IoT applications. Using integrated circuits to assemble electronic equipment, the assembly density can be increased several tens to thousands of times compared to discrete transistor circuits, and the stable working time of the equipment can also be greatly improved. What is an IC, how it works, where to use them and can we even make one by ourselves.I What is an Integrated Circuit (IC)?An integrated circuit (IC), also called a microchip, chip, or microelectronic circuit, is a miniaturized electronic circuit consisting mainly of semiconductor devices and passive components manufactured on the surface of a thin substrate of semiconductor material, typically silicon. In other words, it is a set of electronic circuits on one small flat piece (or "chip") of semiconductor material. The IC is then placed in a protective package to allow easy handling and assembly onto printed circuit boards (PCBs) and to protect the devices from damage. Integrated circuits are a cornerstone of modern electronics and have revolutionized the technology industry.Integrated circuitIntegrated circuits can be classified into thin-film integrated circuits (fabricated on the surface of a semiconductor chip) and thick-film hybrid integrated circuits (composed of independent semiconductor devices and passive components integrated onto a substrate or circuit board to form a miniaturized circuit).Integrated circuits have two main advantages over discrete transistors: cost and performance.The lower cost is due to the fact that the chip uses photolithography technology to print all the components as a unit instead of making transistors one at a time. High performance is achieved through fast switching and lower energy consumption because the components are small and close to each other. Modern ICs can contain billions of transistors in an area of just a few square millimeters. As of 2025, advanced process nodes have reached 3nm and below, with leading-edge chips containing over 100 billion transistors.There are many kinds of integrated circuits on the market. Currently, there is no uniform standard for the designation of integrated circuit models worldwide. Each manufacturer names integrated circuits according to its own method. In general, many IC manufacturers place the acronyms of their company names or company product codes at the beginning of the model, followed by device number, package form, and working temperature range.II What are IC Packaging and Common Types?2.1 What is IC Packaging?IC packaging refers to connecting the circuit pads on the silicon chip to external pins using bond wires or other interconnection methods to enable connection with other devices.The package form refers to the housing for mounting semiconductor integrated circuit chips. It not only plays the role of mounting, fixing, sealing, and protecting the chip and enhancing electro-thermal performance, but also connects the chip contacts to the package shell pins through bond wires or flip-chip bumps. These pins then connect via traces on the printed circuit board to other devices, realizing the connection between the internal chip and external circuits.The chip must be isolated from the outside environment to prevent impurities in the air from corroding the chip circuit and causing electrical performance degradation.2.2 What are Common IC Packaging Types?1. BGA (Ball Grid Array)The ball grid array is one of the surface mount packages. Spherical solder balls are manufactured in an array pattern on the bottom surface of the package substrate. An LSI chip is assembled on the top surface of the substrate, and then molding resin or potting methods are used for encapsulation. It is also referred to as a Pad Array Carrier (PAC). The pin count can exceed 200 and is suitable for LSI packages. The package body can also be made smaller than QFP (Quad Flat Package). BGA packages are used to permanently mount devices such as microprocessors. A BGA can provide more interconnection pins than can be accommodated on a dual in-line or flat package.The following are series of the BGA family:AcronymFull NameFBGAFine-pitch Ball Grid ArrayLBGALow-profile Ball Grid ArrayTEPBGAThermally-Enhanced Plastic Ball Grid ArrayCBGACeramic Ball Grid ArrayOBGAOrganic Ball Grid ArrayTFBGAThin Fine-pitch Ball Grid ArrayPBGAPlastic Ball Grid ArrayMAP-BGAMold Array Process Ball Grid ArrayμBGAMicro Ball Grid ArrayLFBGALow-profile Fine-pitch Ball Grid ArrayTBGAThin Ball Grid ArraySBGASuper Ball Grid ArrayUFBGAUltra-fine Ball Grid Array2. BQFP (Bumpered Quad Flat Pack)A four-sided pin flat package with bumpers, one of the QFP packages. A bulge (bumper) is arranged at the four corners of the package body to prevent pin bending during shipping and handling.3. CERDIP (Ceramic Dual In-line Package)Glass-sealed ceramic DIP used for ECL RAM, DSP (Digital Signal Processor), and other circuits. It is also used for UVEPROM or microcontrollers with EPROM.4. CERQUAD (Ceramic Quad Flat Package)One of the surface-mount packages, used for EPROM circuits. The heat-dissipation property is better than that of plastic QFP, allowing 1.5-2W power dissipation under natural air cooling conditions, but the packaging cost is 3-5 times higher than plastic QFP. Pin spacing includes 1.27mm, 0.8mm, 0.65mm, 0.5mm, and 0.4mm, with pin counts from 32 to 368.5. COB (Chip on Board)Chip on board packaging is one of the bare chip mounting technologies. A semiconductor chip is attached directly to the printed circuit board, and electrical connections between the chip and substrate are realized by wire bonding, then covered with resin to ensure reliability. The bare silicon chip, usually an integrated circuit, is supplied without a traditional package.6. DFP (Dual Flat Package)A flat package with pins on two sides.7. DIC (Dual In-line Ceramic Package)Nickname for ceramic DIP (including glass seals).8. DIP (Dual In-line Package)In microelectronics, a dual in-line package (DIP or DIL) is an electronic component package with a rectangular housing and two parallel rows of electrical connecting pins. The package may be through-hole mounted to a printed circuit board (PCB) or inserted in a socket. The packaging materials include plastic and ceramic. DIP is one of the most popular packages, used for standard logic ICs, memory LSI, and microcontroller circuits. Pin spacing is 2.54mm, pin count ranges from 6 to 64, and the packaging width is usually 15.2mm. Some packages with widths of 7.52mm and 10.16mm are called skinny DIP and slim DIP respectively. Ceramic DIP sealed with low melting point glass is also known as CERDIP.The following are the acronyms of the DIP family (they belong to through-hole packages):AcronymFull NameDIPDual In-line PackageCDIPCeramic DIPCERDIPGlass-sealed Ceramic DIPSDIPSkinny DIPSHDIPShrink DIPMDIPMolded DIPPDIPPlastic DIP9. DTCP (Dual Tape Carrier Package)The name for DTCP from the Electronic Industries Association of Japan.10. DIL (Dual In-line)Nickname for DIP. European semiconductor manufacturers often use this name.11. DSO (Dual Small Outline)Dual small-outline package, nickname for SOP. Some semiconductor manufacturers use this name.12. DTCP (Dual Tape Carrier Package)Dual TCP, with pins made on insulating tape and drawn from both sides of the package. Due to the use of TAB (Tape Automated Bonding) technology, the package is very thin. Often used in liquid crystal display driver LSI, but mostly as customized products.13. FP (Flat Package)One of the surface-mount packages. Nickname for QFP or SOP.14. Flip-chipOne of the bare chip packaging techniques. Metal bumps are fabricated in the electrode areas of the LSI chip, and then the chip is flipped and the metal bumps are connected to the electrode areas on the printed substrate. The occupied area of the package is basically the same as the chip size. It is the smallest and thinnest of all packaging types.15. FQFP (Fine Pitch Quad Flat Package)Small pin spacing QFP. Usually refers to a QFP with pin spacing less than 0.65mm. This name is used by some semiconductor manufacturers.16. GTPAC (Globe Top Pad Array Carrier)Nickname for BGA from Motorola Corporation (now part of NXP and ON Semiconductor).17. GQFP (Quad Flat Package with Guard Ring)QFP with protective ring. It is a plastic QFP with pins protected by a resin guard ring to prevent bending deformation.18. Pin Grid Arrays (PGA)A surface-mount or through-hole package with pins arranged in a grid pattern. Generally, through-hole PGA is a plug-in package with pin lengths of about 3.4mm. Surface-mount PGA has shorter pins on the bottom of the package, with lengths ranging from 1.5mm to 2.0mm.The following are series of the PGA family:AcronymFull NamePGA (Also known as PPGA)Pin Grid ArrayCPGACeramic Pin Grid ArrayFCPGAFlip-chip Pin Grid ArrayOPGAOrganic Pin Grid Array19. LCC (Leadless Chip Carrier)A surface-mount package with only electrode contacts but no pins on all four sides. It is used for high-speed and high-frequency IC packaging, also known as ceramic QFN or QFN-C.The following are series of the LCC family (a chip carrier is a rectangular package with contacts on all four edges):AcronymFull NameLCCLeadless Chip CarrierLCCLeaded Chip CarrierLCCCLeaded Ceramic Chip CarrierCLCCCeramic Leadless Chip CarrierDLCCDual Leadless Chip Carrier (ceramic)PLCCPlastic Leaded Chip Carrier20. JLCC (J-leaded Chip Carrier)Nickname for CLCC with window and ceramic QFJ with window. The name adopted by some semiconductor manufacturers.21. PLCC (Plastic Leaded Chip Carrier)One of the surface-mount packages, with pins drawn from the four sides of the package. Texas Instruments first used it for 64k-bit DRAM and 256k-bit DRAM, and it was widely used in logic LSI and memory devices in the 1990s.22. P-LCC (Plastic Leadless Chip Carrier)Sometimes it's a nickname for plastic QFJ, sometimes for QFN (plastic LCC). Some LSI manufacturers use PLCC to express leaded packaging and P-LCC for leadless packaging.23. PCLP (Printed Circuit Board Leadless Package)Printed circuit board packaging without leads. The name used by Fujitsu for plastic QFN (plastic LCC). Pin spacing: 0.55mm and 0.4mm.24. LGA (Land Grid Array)A package with array electrode contacts on the bottom. When assembling, it can be inserted into a socket or soldered directly to a PCB.25. LOC (Lead on Chip)One of the LSI packaging types, a structure in which the front end of the lead frame is located above the chip. Bump contacts are made near the center of the chip, which are electrically connected with wire bonding. The chip width contained in the same size package is reduced by approximately 1mm.26. LQFP (Low Profile Quad Flat Package)A type of QFP with a 1.4mm (or less) package body thickness. LQFP is the name used by the Electronic Industries Association of Japan according to the QFP shape specification.27. L-QUADOne of the ceramic QFP types. The thermal conductivity of aluminum nitride used for the package substrate is 7-8 times higher than that of alumina, providing excellent heat dissipation. The package frame is aluminum oxide and the chip is sealed by potting method, which reduces cost. It is a package developed for logic LSI.28. MCM (Multi-Chip Module)A package in which multiple semiconductor bare chips are mounted on a wiring substrate. According to substrate material, it can be divided into three categories: MCM-L, MCM-C, and MCM-D. MCM-L uses common glass epoxy multilayer printed substrate with lower wiring density and cost. MCM-C uses thick film technology to form multilayer wiring on ceramic (alumina or glass ceramic) substrates, similar to thick film hybrid ICs. MCM-C has higher wiring density than MCM-L. MCM-D uses thin-film techniques to create multilayer wiring on ceramic (alumina or aluminum nitride) substrates.29. MFP (Mini Flat Package)Nickname for plastic SOP or SSOP. The name adopted by some semiconductor manufacturers.30. MQFP (Metric Quad Flat Package)A classification of QFP according to JEDEC standards. It is a standardized QFP with pin spacing of 0.65mm and body thickness of 2.0mm to 3.8mm.31. MQUAD (Metal Quad)A QFP package developed by Olin Corporation. The substrate and seal cover are made of aluminum. It can dissipate 2.5W to 2.8W under natural air cooling conditions.32. MSP (Mini Square Package)Nickname for QFI, known as MSP in the early stages of development. QFI is the name specified by the Electronic Industries Association of Japan.33. OPMAC (Over Molded Pad Array Carrier)Molded resin sealed pad array carrier. The name for molded resin sealed BGA from Motorola Corporation.34. PAC (Pad Array Carrier)Nickname for BGA.35. PFPF (Plastic Flat Package)Nickname for Plastic QFP. The name used by some LSI manufacturers.36. PGA (Pin Grid Array)One of the plug-in packages in which vertical pins on the bottom are arranged in a grid pattern. The package substrate is basically multilayer ceramic. Most PGA packages are ceramic. They are used in high-speed and large-scale logic LSI circuits, with relatively high cost.37. Piggy BackA ceramic package with a socket, similar to DIP, QFP, and QFN. Used during equipment development with microcontrollers for program validation and debugging. For example, EPROM can be inserted into a socket for debugging.38. QFH (Quad Flat High Package)A type of plastic QFP. To prevent package body cracking, the QFP body is made thicker. The name adopted by some semiconductor manufacturers.39. QFI (Quad Flat I-leaded Package)One of the surface-mount packages. Pins are drawn from the four sides of the package. Attachment to printed substrate uses butt welding connection. Because the pins have no protruding parts, the mounting area is less than QFP.40. QFJ (Quad Flat J-leaded Package)One of the surface mount packages. Pins are drawn from the four sides of the package, bent down in J-shape. It is the name prescribed by the Electronic Industries Association of Japan. Pin spacing is 1.27mm.Available in plastic and ceramic materials. Plastic QFJ is called PLCC in most cases, used for microcontrollers, gate arrays, DRAM, ASSP, OTP circuits, etc., with pin counts from 18 to 84.Ceramic QFJ, also known as CLCC or JLCC. Packages with windows are used for UVEPROM and microcontroller chips with EPROM, with pin counts from 32 to 84.41. QFN (Quad Flat Non-leaded Package)One of the surface-mount packages. Also called LCC in the past. QFN is the name prescribed by the Electronic Industries Association of Japan. The four sides of the package have electrode contacts. Because there are no pins, the mounting area is smaller than QFP. Available in ceramic and plastic materials.42. QFP (Quad Flat Package)One of the surface-mount packages, with pins in L-shape extending from four sides. There are three substrate materials: ceramic, metal, and plastic. In terms of quantity, plastic packaging accounts for the majority. The disadvantage of QFP is that when pin spacing is less than 0.65mm, pins are prone to bending.43. QIC (Quad In-line Ceramic Package)Nickname for ceramic QFP. The name adopted by some semiconductor manufacturers.44. QIP (Quad In-line Plastic Package)Nickname for plastic QFP. The name adopted by some semiconductor manufacturers.45. QTCP (Quad Tape Carrier Package)One of the TCP packages with pins on insulating tape drawn from the four sides of the package. It is a thin package using TAB technology.46. QTP (Quad Tape Package)The name used by the Electronic Industries Association of Japan in April 1993 for the shape specification of QTCP.47. QUIL (Quad In-line)Nickname for QUIP.48. QUIP (Quad In-line Package)Pins are drawn from both sides of the package and bent down into four rows at alternate intervals. Pin spacing is 1.27mm, and when inserted into the printed substrate, the insertion center distance becomes 2.54mm. Therefore, it can be used on standardized printed circuit boards. It is a smaller package than standard DIP.49. SDIP (Shrink Dual In-line Package)One of the plug-in packages with the same shape as DIP, but with smaller pin spacing (1.778mm) compared to DIP (2.54mm). Pin counts range from 14 to 90, and substrate materials include both ceramic and plastic.50. SH-DIP (Shrink Dual In-line Package)Same as SDIP. The name adopted by some semiconductor manufacturers.51. SIL (Single In-line)Nickname for SIP. European semiconductor manufacturers adopt this name.52. SIMM (Single In-line Memory Module)A memory assembly with electrodes attached only to one side of the printed substrate. Usually refers to a plug-in component. Standard SIMM has 30 electrodes with 2.54mm pin spacing and 72 electrodes with 1.27mm pin spacing. Note: SIMM has been largely replaced by DIMM (Dual In-line Memory Module) in modern systems.53. SIP (Single In-line Package)Pins are drawn from one side of the package and arranged in a straight line. When assembled on the printed substrate, the package is in a lateral position. Pin spacing is usually 2.54mm, pin count ranges from 2 to 23, and related products are mostly customized.54. SK-DIP (Skinny Dual In-line Package)A type of skinny DIP with body width of 7.62mm and pin spacing of 2.54mm. Usually referred to simply as DIP.55. SMD (Surface Mount Devices)Some semiconductor manufacturers classify SOP as SMD at times.56. SOI (Small Outline I-leaded Package)One of the surface mount packages with I-shaped pins. Pins extend down from both sides of the package in I-shape with 1.27mm pin spacing. Surface mount area is less than SOP.57. SOIC (Small Outline Integrated Circuit)Nickname for SOP. Many semiconductor manufacturers abroad adopt this name.58. SOJ (Small Outline J-Leaded Package)One of the surface-mount packages with J-shaped pins. Pins extend down from both sides of the package in J-shape. Usually plastic. Mostly used for memory LSI circuits such as DRAM and SRAM, but predominantly DRAM.59. SOL (Small Outline L-leaded Package)The name used for SOP in accordance with JEDEC (Joint Electron Device Engineering Council) memory standards.60. SONF (Small Outline Non-Fin)Same as regular SOP but without heat sink fins. To distinguish power IC packages without heat sinks, the NF (non-fin) designation is intentionally added. The name adopted by some semiconductor manufacturers.61. SOP (Small Outline Package)One of the surface-mount packages in which pins are drawn from both sides of the package in L-shape. Substrate materials include plastic and ceramic. Also called SOL and DFP.Used for memory LSI and widely used for small-scale circuits such as ASSP.62. SOW (Small Outline Package - Wide Type)A wide-type SOP. The name adopted by some semiconductor manufacturers.III Development of Integrated CircuitsThe most advanced integrated circuits are the cores of microprocessors or multi-core processors that control everything from computers to mobile phones and even smart home appliances. Although the cost of designing and developing complex integrated circuits is very high, mass production generates huge profits. The performance of integrated circuits is very high because small size brings short signal paths, enabling low-power logic circuits with fast switching speeds.With technological development, integrated circuits have continued to shrink, allowing each chip to contain more circuits. This increases capacity per unit area, reducing costs and increasing functionality. Generally, as feature size decreases, almost all indicators improve: unit cost and switching power consumption decrease while speed increases. However, ICs also face challenges. For example, ICs with nanometer-scale devices experience leakage current, which increases power consumption and decreases operational efficiency. The IC industry continues to innovate to address these challenges.In just over half a century since its development, integrated circuits have become ubiquitous and indispensable. They are essential components of modern life, found in computers, mobile phones, and other digital appliances. Modern computing, communication, manufacturing, transportation systems, and artificial intelligence all depend on integrated circuits. Many scholars believe that the digital revolution brought about by integrated circuits is one of the most important events in human history. The tremendous development of ICs represents progress not only in design and semiconductor technology but also in higher-level technical fields including AI, quantum computing, and advanced materials science.IV Types of Integrated CircuitsThere are many ways to classify integrated circuits.4.1 By Signal TypeIntegrated circuits can be divided into: analog integrated circuits, digital integrated circuits, and mixed-signal integrated circuits.- Digital Integrated CircuitsDigital integrated circuits can contain logic gates, flip-flops, multiplexers, and other circuits ranging from thousands to billions of transistors in a few square millimeters. Despite their small size, they enable higher speed, lower power consumption, and lower manufacturing costs than board-level integration. These digital ICs, represented by microprocessors, digital signal processors, and microcontrollers, process binary "1" and "0" signals.- Analog Integrated CircuitsAnalog integrated circuits include sensors, power control circuits, operational amplifiers, and other components that process analog signals. They can perform amplification, filtering, demodulation, mixing, and other functions. Using analog integrated circuits lightens the burden on circuit designers, eliminating the need to design everything from individual transistors.- Mixed-Signal Integrated CircuitsMixed-signal integrated circuits integrate both analog and digital circuits on a single chip to create devices such as analog-to-digital converters (ADCs) or digital-to-analog converters (DACs). They offer smaller size and lower cost but require careful attention to signal interference issues.4.2 By ApplicationIntegrated circuits can be divided into standard general-purpose integrated circuits and application-specific integrated circuits (ASICs) according to their application fields.4.3 By Package FormIntegrated circuits can be divided into circular (metal transistor package, generally suitable for high power), flat (good stability, small size), and dual in-line types according to package shape.Practical application categories include:1. Television integrated circuits: Include line and field scanning ICs, intermediate amplifier ICs, audio ICs, color decoding ICs, AV/TV conversion ICs, switching power supply ICs, remote control ICs, digital signal processing ICs, picture-in-picture processing ICs, CPU, memory ICs, and display driver ICs.2. Audio integrated circuits: Include AM/FM high-frequency circuits, stereo decoding circuits, audio preamplifier circuits, audio operational amplifier ICs, audio power amplifier ICs, surround sound processing ICs, level driver ICs, electronic volume control ICs, delay/reverb ICs, and electronic switch ICs.3. Video player integrated circuits: Include system control ICs, video encoding ICs, MPEG decoding ICs, audio signal processing ICs, sound effect ICs, RF signal processing ICs, digital signal processing ICs, servo ICs, and motor driver ICs.4. Computer integrated circuits: Include CPUs, RAM, ROM, cache memory, GPU, I/O control circuits, and chipsets.5. Communication integrated circuits: Include RF transceivers, baseband processors, power amplifiers, and network processors.6. Automotive integrated circuits: Include engine control units (ECUs), sensor interfaces, power management ICs, and advanced driver-assistance systems (ADAS) processors.7. IoT and sensor integrated circuits: Include low-power microcontrollers, wireless connectivity ICs (Wi-Fi, Bluetooth, LoRa), and sensor interface ICs.V Best Practices for IC Testing and Handling1. Understand the IC's working principle before testingBefore inspecting and repairing integrated circuits, familiarize yourself with the IC's function, internal circuit architecture, main electrical parameters, pin functions, normal voltage levels, frequency waveforms, and peripheral components.2. Avoid short circuits between pins during testingWhen measuring voltage or waveforms with an oscilloscope probe, avoid short circuits between pins. It's best to measure at peripheral printed circuit traces directly connected to pins. Any momentary short circuit can easily damage IC devices, especially when testing CMOS ICs which require extra care.3. Use proper isolation when testingWhen working with equipment, especially high-power devices, ensure proper electrical isolation. Always verify whether the chassis is grounded to prevent power supply short circuits and equipment damage.4. Ensure proper soldering iron insulationNever solder while power is on. The soldering iron shell should be grounded. For MOS circuits, use a low-voltage soldering iron (6V to 8V) or ESD-safe equipment for added safety.5. Ensure high-quality solderingDuring soldering, avoid solder bridges and cold joints. Soldering time should not exceed 3 seconds, and soldering iron power should be around 25W. After soldering ICs, carefully inspect for shorts between pins using an ohmmeter before applying power.6. Don't hastily conclude IC damageDon't immediately assume an IC is damaged. Since most ICs use direct coupling, abnormal operation in one circuit can cause voltage changes in multiple locations, which doesn't necessarily indicate IC damage. Additionally, in some cases, pin voltages may appear normal or close to normal values, but this doesn't guarantee the IC is functioning properly, as some faults don't affect DC voltage levels.7. Use high-impedance test instrumentsWhen measuring DC voltage at IC pins, use a multimeter with input impedance greater than 20kΩ/V to avoid significant measurement errors on some pins.8. Ensure adequate heat dissipation for power ICsPower integrated circuits must have proper heat dissipation and should not operate at high power without heat sinks.9. Design reasonable circuit layoutsIf adding peripheral components to replace damaged internal IC functions, use small components and design reasonable wiring to avoid unnecessary parasitic coupling. Pay special attention to grounding between audio power amplifier ICs and preamplifier circuits.10. Follow ESD protection proceduresAlways use ESD-safe handling procedures, including wrist straps, ESD mats, and proper grounding when working with sensitive ICs, especially CMOS and high-frequency devices.Frequently Asked Questions (FAQs)1. What is an IC used for?An integrated circuit (IC) is a small chip that can function as an amplifier, oscillator, timer, microprocessor, memory, or even a complete computer system. An IC is a small wafer, usually made of silicon, that can contain anywhere from hundreds to billions of transistors, resistors, and capacitors. ICs are used in virtually all electronic equipment today, including smartphones, computers, automobiles, medical devices, industrial equipment, and IoT devices.2. How does an IC work?Integrated circuits are combinations of diodes, microprocessors, and transistors in miniaturized form on a silicon wafer. Transistors are used to store voltages, stabilize circuits, amplify signals, and function as switches in digital circuits. The interconnected components work together to perform specific functions, from simple logic operations to complex computational tasks.3. What is an IC diagram?In an electronic schematic diagram, an integrated circuit is usually represented as a rectangle with circuit connections placed conveniently around it without regard for the physical positioning of the pins. The schematic diagram shows the logical connections and functions rather than the physical layout. Detailed IC diagrams include pin numbers, power connections, and functional blocks.4. How are IC pins numbered?IC pins are numbered sequentially (pin 1, pin 2, pin 3, etc.). On a DIP IC, a half-circle notch or dot indicates pin 1's location. With the notch or dot oriented at the top, pin 1 of a DIP IC is always the top-left pin, and numbering continues counter-clockwise. For surface-mount packages like QFP, pin 1 is typically marked with a dot, and numbering proceeds counter-clockwise from that corner.5. What are the different types of IC packages?Common IC package types include:DIP (Dual In-line Package) - through-hole mountingSOP/SOIC (Small Outline Package) - surface mountQFP (Quad Flat Package) - surface mount with pins on four sidesQFN (Quad Flat No-lead Package) - surface mount, leadlessBGA (Ball Grid Array) - surface mount with solder ballsCSP (Chip Scale Package) - very small surface mountPGA (Pin Grid Array) - through-hole with pins in grid patternLGA (Land Grid Array) - surface mount with contact pads6. How do you use an IC in a circuit?To use an IC in a circuit: 1) Identify the IC's pin configuration from its datasheet, 2) Connect power supply pins (VCC/VDD and GND) with appropriate bypass capacitors, 3) Connect input and output pins according to your circuit requirements, 4) Add any required external components (resistors, capacitors, crystals) as specified in the datasheet, 5) Ensure proper signal levels and timing, and 6) Follow ESD precautions during handling and installation.7. How are ICs named?IC naming conventions vary by manufacturer but typically include: a prefix indicating the manufacturer or series (e.g., "SN" for Texas Instruments), a number indicating the device family or function (e.g., "74" for 7400 series logic), additional digits specifying the exact function, and sometimes suffixes indicating package type, temperature range, or speed grade. For example, "SN74HC00N" indicates a Texas Instruments 7400 series high-speed CMOS quad NAND gate in a DIP package.8. Which ICs are most commonly used?Some of the most commonly used ICs include: the 555 timer (invented in 1971, still widely used), operational amplifiers like the LM358 and TL072, voltage regulators such as the 7805 series, microcontrollers like Arduino-compatible ATmega chips and ARM Cortex processors, memory chips (DRAM, Flash), and logic gates from the 74 series. Modern applications heavily use system-on-chip (SoC) designs that integrate multiple functions.9. How many types of ICs are there?There are thousands of different IC types. Standard logic ICs alone include roughly 600 types, from basic chips to highly functional arithmetic-logic units. ICs are implemented using different technologies: TTL (Transistor-Transistor Logic) and CMOS being the most common. By function, ICs can be categorized as analog, digital, or mixed-signal. By application, they include microprocessors, memory, power management, communication, sensors, and many specialized functions.10. What are the advantages of ICs?Advantages of ICs include: extremely small physical size compared to discrete circuits, very light weight, high reliability due to fewer interconnections, lower power consumption, faster operation due to shorter signal paths, lower cost in mass production, better performance consistency, improved noise immunity, easier circuit design and assembly, and reduced maintenance requirements. However, ICs are difficult to repair if damaged and typically must be replaced as complete units.11. What is Moore's Law and is it still relevant?Moore's Law, proposed by Gordon Moore in 1965, observed that the number of transistors on integrated circuits doubles approximately every two years. As of 2025, while the pace has slowed somewhat, the semiconductor industry continues to advance through innovations in 3D chip stacking, new materials like gallium nitride (GaN), and advanced packaging techniques. The focus has shifted from pure transistor density to improving performance per watt, specialized AI accelerators, and chiplet architectures.12. What is the difference between an IC and a microprocessor?An IC (Integrated Circuit) is a general term for any chip containing electronic components. A microprocessor is a specific type of IC that contains a central processing unit (CPU) capable of executing instructions and performing computations. All microprocessors are ICs, but not all ICs are microprocessors. Other IC types include memory chips, analog circuits, power management ICs, and sensors.13. How are ICs manufactured?IC manufacturing involves multiple complex steps: 1) Silicon wafer preparation from purified silicon, 2) Photolithography to pattern circuit designs using UV light and photoresist, 3) Etching to remove unwanted material, 4) Doping to create P-type and N-type semiconductor regions, 5) Deposition of insulating and conducting layers, 6) Multiple repetitions of these steps to build up circuit layers, 7) Testing of individual dies on the wafer, 8) Dicing the wafer into individual chips, and 9) Packaging and final testing. Modern fabs can cost billions of dollars and require extremely clean environments.14. What is the difference between ASIC and FPGA?ASIC (Application-Specific Integrated Circuit) is a custom-designed IC optimized for a specific application, offering high performance and efficiency but requiring significant upfront design costs. FPGA (Field-Programmable Gate Array) is a reconfigurable IC that can be programmed after manufacturing, offering flexibility and faster time-to-market but typically with lower performance and higher power consumption than ASICs. FPGAs are ideal for prototyping, low-volume production, or applications requiring updates, while ASICs are preferred for high-volume, performance-critical applications.15. What are emerging IC technologies in 2025?Emerging IC technologies as of 2025 include: 1) 3nm and smaller process nodes using extreme ultraviolet (EUV) lithography, 2) 3D chip stacking and chiplet architectures for improved performance and yield, 3) Neuromorphic computing chips mimicking brain function, 4) Quantum computing processors, 5) Photonic integrated circuits using light instead of electricity, 6) Advanced packaging techniques like fan-out wafer-level packaging, 7) AI-specific accelerators and neural processing units (NPUs), 8) Wide-bandgap semiconductors (GaN, SiC) for power electronics, and 9) Flexible and stretchable electronics for wearable devices.VI IC Applications Across Industries6.1 Consumer ElectronicsICs are fundamental to modern consumer electronics. Smartphones contain dozens of specialized ICs including application processors, memory chips, power management ICs, RF transceivers, camera image processors, and display drivers. Smart TVs use ICs for video processing, audio enhancement, connectivity (Wi-Fi, Bluetooth), and smart features. Wearable devices like smartwatches and fitness trackers rely on low-power microcontrollers, sensor interface ICs, and wireless communication chips.6.2 Automotive IndustryModern vehicles contain hundreds of ICs controlling everything from engine management to infotainment systems. Advanced Driver Assistance Systems (ADAS) use specialized processors for real-time image processing, radar signal processing, and sensor fusion. Electric vehicles require power management ICs for battery management, motor control, and charging systems. Automotive ICs must meet stringent reliability and temperature requirements (AEC-Q100 qualification).6.3 Industrial and IoT ApplicationsIndustrial automation relies on ICs for motor control, sensor interfaces, industrial communication protocols (CAN, Modbus, EtherCAT), and programmable logic controllers (PLCs). IoT devices use ultra-low-power microcontrollers, wireless connectivity ICs (LoRa, NB-IoT, Zigbee), and energy harvesting circuits to enable battery-powered operation for years. Smart home devices integrate multiple functions into system-on-chip designs.6.4 Medical DevicesMedical electronics use specialized ICs for patient monitoring, diagnostic imaging, implantable devices, and therapeutic equipment. These ICs must meet strict regulatory requirements (FDA, CE marking) and often require ultra-low power consumption, high precision, and biocompatibility. Examples include pacemaker controllers, blood glucose monitor ICs, and ultrasound signal processors.6.5 Telecommunications and Data Centers5G infrastructure relies on high-frequency RF ICs, digital signal processors, and network processors. Data centers use specialized ICs for server processors, network switches, storage controllers, and AI acceleration. Power efficiency is critical, driving development of specialized chips optimized for specific workloads like machine learning inference or video transcoding.VII Future Trends in IC Technology7.1 Advanced Manufacturing ProcessesThe semiconductor industry continues pushing toward smaller process nodes. As of 2025, leading manufacturers are producing 3nm chips with plans for 2nm and beyond. These advances use extreme ultraviolet (EUV) lithography, gate-all-around (GAA) transistor structures, and new materials. However, physical and economic limits are driving innovation in alternative approaches like 3D stacking and chiplet architectures.7.2 Heterogeneous IntegrationRather than making single monolithic chips larger and more complex, the industry is moving toward chiplet designs where multiple smaller chips (dies) are integrated in a single package. This approach improves yield, allows mixing different process technologies, and enables modular designs. Advanced packaging techniques like TSMC's CoWoS (Chip-on-Wafer-on-Substrate) and Intel's EMIB (Embedded Multi-die Interconnect Bridge) enable high-bandwidth connections between chiplets.7.3 AI and Machine Learning AccelerationSpecialized AI accelerators and neural processing units (NPUs) are becoming standard in devices from smartphones to data center servers. These chips use architectures optimized for matrix multiplication and other AI operations, offering orders of magnitude better performance and energy efficiency than general-purpose processors for AI workloads. Edge AI chips enable on-device processing for privacy and latency-sensitive applications.7.4 Quantum ComputingWhile still in early stages, quantum computing ICs are advancing rapidly. These chips operate at near absolute zero temperatures and manipulate quantum bits (qubits) to perform certain calculations exponentially faster than classical computers. Companies like IBM, Google, and Intel are developing increasingly capable quantum processors, though practical large-scale quantum computers remain years away.7.5 Sustainable and Green ElectronicsEnvironmental concerns are driving development of more energy-efficient ICs and sustainable manufacturing processes. This includes ultra-low-power designs for battery-powered devices, power management ICs for renewable energy systems, and efforts to reduce water and chemical usage in semiconductor manufacturing. The industry is also addressing electronic waste through improved recyclability and longer product lifespans.VIII ConclusionIntegrated circuits have transformed from simple devices containing a few transistors to incredibly complex systems with billions of components. They are the foundation of modern technology, enabling everything from smartphones and computers to artificial intelligence and autonomous vehicles. As we move forward, ICs will continue to evolve through advanced manufacturing processes, new materials, innovative architectures, and specialized designs for emerging applications.Understanding IC fundamentals, packaging types, and applications is essential for anyone working in electronics, whether as a hobbyist, student, or professional engineer. The field continues to offer exciting opportunities for innovation and remains one of the most important technologies shaping our future.Article Update Information:This article was originally published in 2016 and has been comprehensively updated in November 2025 to reflect current IC technologies, manufacturing processes, and applications. Updates include:Current transistor densities and process node information (3nm and beyond)Modern packaging technologies and advanced integration techniquesEmerging applications in AI, automotive, IoT, and 5GUpdated best practices for IC handling and testingExpanded FAQ section with 15 comprehensive questions and answersNew sections on industry applications and future trendsCorrected outdated references (e.g., tape recorders replaced with modern devices)Improved HTML structure with proper heading hierarchyEnhanced technical accuracy and clarity throughoutLast updated: November 2025

A Semiconductor is an element which is intermediate of conductor and an insulator. Semi-conductor is kind of material that contains electrical conductivity value between a conductor and an insulator such as copper or glass. Semi-conductors are the base of modern electronics. Semi-conductors are responsible for the computer Technology and its formation, which began in the mid of 20th century and still continuing.Semiconductor devices or electronic circuit components made from a material that is neither a good conductor nor a good insulator (called semiconductor). These devices have found wide applications because of their reliability, compactness, and very low cost. Semi-conductor systems or components are actually electronic components that take advantage of the electronic properties of the semi-conductor materials such as germanium, silicon and gallium arsenide. With the invention of the semiconductor devices have replaced most of the most of the vacuum tube applications. A semiconductor device is manufactured as either single discrete device or as integrated circuits. The integrated circuits include a few number to few million devices interconnected to a single semiconductor substrate. The cause why the semiconductor equipments are used in developing most devices is that the behavior of a semiconductor can easily be controlled by adding impurities which is or else called as doping. Transmission in a semi conductor occurs by free electrons which on the whole are called as the charge carriers.Semiconductors have massive impact on our society. Semiconductors mostly presents at the heart of microprocessor chips as well as transistors. Anything that's automated or uses radio waves depends on semiconductors. Today's mostly semiconductor chips and transistors are created with silicon. We may have heard words like "Silicon Valley" and the "silicon economy," and that's why -- silicon is the heart of any electronic device.A list of Semiconductor Components and devices includes Gunn diode, Avalanche diode, Light-emitting diode, PIN diode, IMPATT diode, DIAC, Schottky diode, Diode, Laser diode, Photocell, Tunnel diode, Solar cell, VCSEL, VECSEL and Zener diode are two terminal devices. The three terminal devices includes Darlington transistor, Bipolar transistor, Field effect transistor, IGBT, GTO, (Switched Gate Commuted Thyristor),SCR (Silicon Controlled Rectifier), SGCT, Thyristor, TRIAC, Unijunction transistor. The four terminal devices contains Hall Effect sensor (magnetic field sensor), Microprocessor, Multi-terminal devices comprises of Charge-coupled device (CCD), Read-only memory (ROM), Random Access Memory (RAM), and the list goes on.Written by  David John