The Kynix Blog

Introduction to MicrocontrollersImagine a tiny, self-contained computer that fits on your fingertip yet can control everything from your coffee maker to your car's engine. That's the magic of microcontrollers – the unsung heroes of our digital world. According to recent statistics, over 30 billion microcontroller units are produced annually, powering countless devices we interact with daily.Whether you're an electronics enthusiast, a budding engineer, or simply curious about how modern technology works, understanding microcontrollers opens a gateway to creating your own smart devices and automated systems. In this comprehensive guide, we'll demystify these powerful components and show you how to get started with them – no prior experience required!The MCU (microcontroller unit) revolution is accessible to everyone, with options ranging from sophisticated industrial-grade chips to affordable learning platforms. By the end of this article, you'll understand what makes these tiny computers tick and be ready to embark on your own microcontroller journey.1.1 What Is a Microcontroller?A microcontroller (MCU) is a compact integrated circuit designed to govern a specific operation in an embedded system. Think of it as a small computer on a single metal-oxide-semiconductor (MOS) integrated circuit chip. Unlike your desktop or laptop computer, which is designed for general-purpose tasks, a microcontroller is purpose-built to execute one program with specific functions.The heart of any microcontroller is its microcontroller CPU – the central processing unit that executes instructions and processes data. However, what makes an MCU special is that it combines this CPU with other essential components:Memory for storing programs and dataInput/output (I/O) ports for connecting to the outside worldTimers and countersAnalog-to-digital convertersCommunication interfaces"Microcontrollers are the digital glue that connects our physical world to the computational one. They sense, decide, and act – often without us ever knowing they're there." – Industry expert on embedded systemsThis integration of components makes microcontrollers perfect for dedicated tasks where reliability, cost-effectiveness, and power efficiency are crucial – from controlling your microwave oven to managing complex industrial systems.Pro Tip: When starting with microcontrollers, focus on understanding the concept of embedded computing rather than getting caught up in technical specifications. The fundamental principle is that these devices interact with the physical world through inputs (sensors) and outputs (actuators).1.2 The Evolution of MicrocontrollersThe journey of microcontrollers began in the early 1970s with Intel's 4004 and 8008 microprocessors, but it was Texas Instruments' TMS 1000 in 1971 that is widely recognized as the first true microcontroller. Since then, these devices have undergone a remarkable evolution:1970s: First-generation MCUs with simple 4-bit and 8-bit architectures1980s: Introduction of EEPROM for easier programming and the rise of popular families like PIC and 80511990s: Development of flash memory-based MCUs, making reprogramming more accessible2000s: Emergence of 32-bit architectures and increased integration of peripherals2010s-Present: Ultra-low-power MCUs, Internet of Things (IoT) capabilities, and advanced processing powerToday's microcontrollers are thousands of times more powerful than their ancestors while consuming less power and costing less. This progression has democratized electronics development, making it possible for hobbyists, students, and small businesses to create sophisticated embedded systems that were once the domain of large corporations with massive R&D budgets.Fundamentals of Microcontroller ArchitectureTo work effectively with microcontrollers, you need a basic understanding of their architecture – how they're organized internally and how their different components interact. Don't worry; we'll keep this accessible without drowning in technical jargon.2.1 Microcontroller CPU and Core ComponentsThe microcontroller CPU serves as the brain of the MCU, executing instructions stored in memory. Most beginner-friendly microcontrollers use either:RISC (Reduced Instruction Set Computer) architecture: Simpler but faster execution of a limited set of instructionsCISC (Complex Instruction Set Computer) architecture: More complex instructions that can perform multiple operationsBeyond the CPU, every microcontroller contains these essential components:Program Memory: Stores the code that the microcontroller executes (typically Flash memory)Data Memory: Stores variables and data (RAM)EEPROM: Non-volatile memory for data that must be retained when power is offClock System: Provides timing signals for synchronizing operationsReset Circuit: Ensures proper startup and recovery from errorsPower Management: Controls power consumption modes2.2 Memory Types in MCUsMemory is a critical component of any microcontroller, and understanding the different types will help you choose the right MCU for your project:Flash Memory: Non-volatile program storage that can be electronically erased and reprogrammedRAM (Random Access Memory): Volatile memory used for storing variables and runtime dataEEPROM (Electrically Erasable Programmable Read-Only Memory): Non-volatile memory for storing configuration dataROM (Read-Only Memory): Factory-programmed memory that cannot be changed (less common in modern MCUs)Important Note: When selecting a microcontroller for your project, pay special attention to the amount of available memory. Running out of program memory or RAM is a common issue for beginners who underestimate their project's requirements.2.3 Input/Output InterfacesThe ability to interact with the outside world is what makes microcontrollers so versatile. Most MCUs offer several types of I/O (Input/Output) interfaces:Digital I/O Pins: Basic pins that can be set HIGH (typically 3.3V or 5V) or LOW (0V)Analog Inputs: Pins connected to Analog-to-Digital Converters (ADCs) that can read varying voltage levelsPWM (Pulse Width Modulation) Outputs: Digital outputs that can simulate analog signalsCommunication Interfaces: Including UART, SPI, I2C, and sometimes USB or EthernetSpecial Function I/O: Timer inputs/outputs, interrupts, etc.These interfaces allow microcontrollers to connect to sensors (temperature, motion, light), actuators (motors, relays, LEDs), communication modules, and other devices or systems.Microcontroller vs. Microprocessor: Understanding the DifferenceOne of the most common confusions for beginners is understanding the distinction between microcontrollers and microprocessors. While related, these components serve different purposes and are designed for different applications.3.1 Key Architectural DifferencesHere's a comparison table highlighting the main differences between microcontrollers and microprocessors:FeatureMicrocontroller (MCU)Microprocessor (MPU)IntegrationAll-in-one system with CPU, memory, and peripheralsCPU only, requires external componentsMemoryLimited on-chip memoryRelies on external memoryPower ConsumptionLow (typically milliwatts)Higher (watts or more)CostLower (often $1-$15)Higher (from $20 to hundreds)SpeedLower clock speeds (kHz to MHz range)Higher clock speeds (GHz range)UsageDedicated, specific tasksGeneral-purpose computingSizeCompact, single-chip solutionRequires multiple chips and componentsExamplesATmega328 (Arduino), PIC16F, STM32Intel Core i7, AMD Ryzen, ARM Cortex-AThe fundamental difference is that a microcontroller is a self-contained system with all necessary components integrated onto a single chip, while a microprocessor is essentially just a CPU that requires additional external components to function as a complete system."If a microprocessor is the brain, then a microcontroller is the brain, nervous system, and some sensory organs all in one package." – Embedded systems engineer3.2 Application Scenarios: When to Use EachChoosing between a microcontroller and a microprocessor depends on your application requirements:Choose a Microcontroller When:You need a simple, self-contained solutionPower efficiency is criticalCost is a major constraintThe application performs specific, dedicated tasksPhysical space is limitedReal-time response is essentialChoose a Microprocessor When:Complex computations are requiredYou need to run sophisticated operating systemsThe application requires high processing powerMultitasking is essentialLarge amounts of data need to be processedFlexibility and expandability are prioritiesIs Arduino a microcontroller or microprocessor? This is a common question with a simple answer: Arduino boards are based on microcontrollers, not microprocessors. The Arduino Uno, for example, uses an ATmega328P microcontroller as its brain. Arduino provides a complete development platform around these microcontrollers, making them accessible to beginners.Popular Microcontroller Families and PlatformsThe world of microcontrollers offers diverse options to suit different needs, skill levels, and budgets. Let's explore some of the most popular microcontroller families and development platforms that are ideal for beginners.4.1 Arduino and Its EcosystemArduino has revolutionized the accessibility of microcontrollers by creating an easy-to-use platform that combines hardware, software, and comprehensive documentation. The Arduino ecosystem includes:Arduino Boards: Hardware platforms based on various microcontrollers (primarily AVR and ARM)Arduino IDE: A simplified programming environmentArduino Libraries: Pre-written code to handle common tasksShields: Add-on boards that extend functionalityWhat makes Arduino particularly beginner-friendly is its focus on simplifying the complexities of microcontroller programming. With functions like digitalWrite() and analogRead(), even those with minimal programming experience can create interactive projects.Pro Tip: Start with an Arduino Uno R3 for your first microcontroller project. It offers an excellent balance of capabilities, community support, and ease of use. You can find quality Arduino boards and compatible components at Kynix.com.4.2 PIC MicrocontrollersPIC microcontrollers, developed by Microchip Technology, represent one of the oldest and most established MCU families. The PIC CPU architecture is known for its efficiency and reliability in industrial applications.Key features of PIC microcontrollers include:Wide range of options (8-bit, 16-bit, and 32-bit versions)Excellent power management capabilitiesStrong support for analog functionsComprehensive development tools from MicrochipWidespread use in professional and industrial applicationsPIC microcontrollers are slightly more challenging for beginners than Arduino but offer greater flexibility and are often used in commercial products. The MPLAB IDE and PICkit programmers provide the development environment for these MCUs.4.3 Budget-Friendly Options: Cheapest Microcontrollers for BeginnersIf you're on a tight budget, several affordable microcontroller options can get you started without compromising on learning value:ATtiny Series: These minimalist AVR microcontrollers can cost less than $1 and are perfect for simple projects.ESP8266/ESP32: Amazingly powerful Wi-Fi-enabled microcontrollers starting around $3-$5, offering exceptional value.STM32 "Blue Pill": ARM Cortex-M based boards available for approximately $2-$4 that deliver impressive performance.MSP430 LaunchPad: Texas Instruments' low-power microcontrollers with development boards starting around $10.Raspberry Pi Pico: Based on the RP2040 microcontroller, costs around $4.Programming MicrocontrollersNow that you understand the hardware aspects of microcontrollers, let's explore how to bring them to life through programming. One of the most common questions beginners ask is "how do you program a microcontroller?" – and we'll address that comprehensively in this section.5.1 Programming Languages for MCUsSeveral programming languages are commonly used for microcontroller development, each with its own advantages:C/C++: The most widely used languages for microcontroller programming, offering a good balance between performance and readability. Most microcontroller platforms provide C/C++ support as their primary language.Assembly: A low-level language that provides direct control over the microcontroller hardware. While powerful and efficient, it has a steeper learning curve and is generally used only for performance-critical sections of code.MicroPython/CircuitPython: Python variants designed specifically for microcontrollers, making programming more accessible to beginners. These interpreted languages sacrifice some performance for ease of use.Arduino Language: A simplified version of C++ with additional libraries that make microcontroller programming more accessible to beginners.Block-based Programming: Visual programming environments like Scratch for Arduino or Blockly, which are ideal for educational purposes.Editor's Review: For beginners, I recommend starting with either the Arduino language (if using Arduino hardware) or MicroPython (particularly on ESP32 or Raspberry Pi Pico platforms). These options provide the gentlest learning curve while still teaching fundamental programming concepts that transfer to other languages.5.2 Development Environments and ToolsTo program microcontrollers effectively, you'll need appropriate development tools:Integrated Development Environments (IDEs):Arduino IDE: Simple, beginner-friendly environment for Arduino boardsMPLAB X: Microchip's professional IDE for PIC microcontrollersSTM32CubeIDE: Comprehensive environment for STM32 microcontrollersPlatformIO: A cross-platform IDE that supports multiple microcontroller familiesThonny or Mu: Simplified environments for MicroPython programmingHardware Programmers/Debuggers:AVRISP mkII for AVR microcontrollersPICkit for PIC microcontrollersST-Link for STM32 microcontrollersUSB-to-Serial adapters for platforms like ESP8266/ESP32Additional Tools:Oscilloscopes and logic analyzers for debuggingMultimeters for basic electrical measurementsBreadboards and jumper wires for prototypingPro Tip: Take advantage of Kynix.com's selection of development boards and programming tools. Having reliable equipment makes the learning process much smoother and helps avoid frustrating technical issues.5.3 Step-by-Step Guide to Programming Your First MCULet's walk through the process of programming a microcontroller using Arduino as an example, as it's the most beginner-friendly platform:Set Up Your Development EnvironmentDownload and install the Arduino IDE from the official websiteConnect your Arduino board to your computer via USBUnderstand the Basic Program StructureEvery Arduino program (called a "sketch") has at least two main functions:setup(): Runs once when the microcontroller startsloop(): Runs repeatedly after setup completesWrite Your First ProgramThe classic first program is "Blink," which turns an LED on and off:// Pin 13 has an LED connected on most Arduino boardsint ledPin = 13;void setup() { // Initialize the digital pin as an output pinMode(ledPin, OUTPUT);}void loop() { digitalWrite(ledPin, HIGH); // Turn the LED on delay(1000); // Wait for a second digitalWrite(ledPin, LOW); // Turn the LED off delay(1000); // Wait for a second}​Compile Your ProgramClick the "Verify" button in the Arduino IDEThe IDE will convert your code into machine instructions the microcontroller can understandUpload to the MicrocontrollerClick the "Upload" buttonThe compiled program is transferred to the microcontroller's flash memoryObserve and TroubleshootWatch your microcontroller execute the programIf it doesn't work as expected, use the Serial Monitor for debuggingCommon Pitfalls When Programming MCUs:Forgetting to set pin modes (input or output)Using incorrect pin numbersNot managing memory efficientlyFailing to handle hardware timing issuesCreating infinite loops that prevent the program from progressingPractical Applications of MicrocontrollersWhat are microcontrollers used for? This question reflects the curiosity of many beginners. The applications are virtually limitless, spanning from simple hobby projects to complex industrial systems. Let's explore some practical uses that demonstrate the versatility of these tiny computers.6.1 Home Automation ProjectsMicrocontrollers have transformed home automation, making smart home features accessible to DIY enthusiasts:Smart Lighting Systems: Control lights based on time, motion, or remotely via smartphoneAutomated Plant Watering: Monitor soil moisture and water plants automatically when neededTemperature and Humidity Monitoring: Create custom climate control systemsSecurity Systems: Build motion detectors, door/window sensors, and camera control systemsVoice-Controlled Devices: Integrate with voice assistants like Amazon Alexa or Google AssistantEditor's Review: I've found that home automation projects provide the perfect learning path for beginners. They're practical (you actually use what you build), modular (start simple and expand), and highly customizable to your specific needs. The ESP8266 and ESP32 microcontrollers are particularly well-suited for these projects due to their built-in Wi-Fi capabilities.6.2 Industrial ApplicationsIn industrial settings, microcontrollers perform critical control and monitoring functions:Programmable Logic Controllers (PLCs): Industrial-grade control systems based on microcontrollersMotor Control Systems: Precise control of motors in manufacturing equipmentData Acquisition Systems: Collecting and processing sensor data in real-timeIndustrial IoT Devices: Connected sensors and controllers for smart factoriesSafety Systems: Monitoring critical parameters and triggering safety protocolsThese applications typically require robust microcontrollers with industrial temperature ranges, reliability features, and certifications. Manufacturers like Microchip, Texas Instruments, and STMicroelectronics offer specialized industrial-grade MCUs available through distributors like Kynix.com.6.3 Embedded Systems in Consumer ElectronicsMost consumer electronics rely on microcontrollers to function:Household Appliances: From simple toasters to complex washing machinesEntertainment Systems: Remote controls, audio processors, and display controllersFitness Trackers: Monitoring movement, heart rate, and other biometricsToys and Games: Interactive features and control systemsAutomotive Electronics: Everything from window controls to engine managementThese embedded systems demonstrate how microcontrollers operate invisibly in our daily lives, often running for years without users even realizing they're there. The next time you press a button on your microwave or adjust your car's climate control, remember there's a microcontroller making it happen!Future Trends and Advanced MCU TopicsThe world of microcontrollers is constantly evolving. Understanding emerging trends helps you prepare for the future and make informed decisions about which technologies to learn.7.1 IoT and Connected MicrocontrollersThe Internet of Things (IoT) represents one of the most significant growth areas for microcontrollers:Cloud-Connected MCUs: Microcontrollers with built-in internet connectivity featuresSecure Communication: Enhanced security protocols for transmitting sensitive dataEdge Computing: Processing data locally before sending only relevant information to the cloudOver-the-Air Updates: Remote firmware updates for deployed devicesProtocol Standards: Implementation of IoT standards like MQTT, CoAP, and LwM2MAccording to recent industry data, IoT-enabled microcontrollers are expected to grow at a compound annual growth rate of over 15% through 2026, making this a key area for developers to focus on.7.2 Energy-Efficient MCUsAs battery-powered applications proliferate, energy efficiency has become a critical focus:Ultra-Low-Power Architectures: Specialized designs that consume minimal powerAdvanced Sleep Modes: Multiple power states that preserve battery lifeEnergy Harvesting Compatibility: Ability to operate from solar, kinetic, or thermal energyOptimized Peripherals: Hardware modules designed for minimal power consumptionBattery Management Systems: Intelligent power management to extend battery lifePro Tip: When working on battery-powered projects, choose microcontrollers specifically designed for low power consumption, such as the MSP430 from Texas Instruments or the STM32L series from STMicroelectronics. These specialized MCUs can extend battery life from months to years compared to standard alternatives.Conclusion and Next StepsWe've covered a comprehensive introduction to microcontrollers, from understanding what they are and how they work to exploring their applications and programming methods. As we've seen, these versatile devices form the backbone of countless electronic systems and offer endless possibilities for both hobbyists and professionals.Key Takeaways:Microcontrollers are self-contained computing systems that combine a CPU, memory, and I/O peripherals on a single chipThey differ from microprocessors in their integration, power consumption, and application focusPopular platforms like Arduino provide accessible entry points for beginnersProgramming options range from C/C++ to more beginner-friendly languages like MicroPythonApplications span from simple home projects to complex industrial systemsWhere to Go From Here:Start Small: Begin with a beginner-friendly platform like Arduino and simple projects that interest youBuild a Component Collection: Gather basic components like LEDs, resistors, and sensors from Kynix.comJoin Communities: Participate in online forums and local makerspaces to learn from othersExpand Your Knowledge: Gradually explore different microcontroller families and more advanced conceptsDocument Your Journey: Keep notes on what works, what doesn't, and lessons learnedThe microcontroller journey is rewarding precisely because it combines multiple disciplines—electronics, programming, and practical problem-solving. Each project builds your skills and opens new possibilities for creativity and innovation.FAQ: Common Questions About MicrocontrollersWhat is a microcontroller?A microcontroller (MCU) is a compact integrated circuit that contains a processor core, memory, and programmable input/output peripherals on a single chip. It's essentially a small, self-contained computer designed to perform specific tasks within an embedded system.Is Arduino a microcontroller or microprocessor?Arduino is neither—it's a platform that consists of a development board built around a microcontroller (typically from the Atmel AVR family). The Arduino Uno, for example, uses the ATmega328P microcontroller. The Arduino platform combines hardware, software, and documentation to make microcontroller programming more accessible.How do you program a microcontroller?Programming a microcontroller typically involves:Writing code in a supported language (often C/C++, Python, or assembly)Compiling the code into machine instructionsTransferring these instructions to the microcontroller using a programmer/debuggerThe specific tools and processes vary by microcontroller family, but most modern platforms provide integrated development environments (IDEs) that simplify this process.What are microcontrollers used for?Microcontrollers are used in virtually any device that needs to control functions based on programmed logic:Consumer electronics (appliances, toys, remote controls)Automotive systems (engine control, climate systems, entertainment)Industrial automation (sensors, controllers, safety systems)Medical devices (monitors, pumps, diagnostic equipment)Smart home devices (thermostats, security systems, lighting)IoT devices (connected sensors, smart devices)What are the differences between microprocessor and microcontroller?The key differences include:Integration: Microcontrollers include CPU, memory, and I/O on a single chip, while microprocessors typically need these components added externallyPurpose: Microcontrollers are designed for specific control tasks, while microprocessors are for general-purpose computingCost and complexity: Microcontrollers are generally simpler and less expensivePower consumption: Microcontrollers typically use much less powerMemory: Microcontrollers have limited on-chip memory, while microprocessor systems can address vast amounts of external memoryWhat's the cheapest microcontroller for beginners?Some of the most affordable options include:ATtiny85 chips (under $1)ESP8266 modules (around $3)STM32 "Blue Pill" boards (around $2)Arduino Nano clones (around $3-4)Raspberry Pi Pico (around $4)For beginners, the slightly higher cost of development boards like the Arduino Nano or Raspberry Pi Pico often represents better value, as they include USB interfaces and other conveniences that make getting started easier.About the Author: This guide was created by an experienced embedded systems engineer with over a decade of experience in microcontroller development and teaching electronics to beginners.Last Updated: 2025-04-15Whether you're looking to build a simple LED blinker or a complex IoT device, Kynix.com offers the components and development tools you need to bring your microcontroller projects to life.

SummaryThe process that makes gold-plated jewelry or chrome car accents is now making powerful lithium-ion batteries. It's reported in the Joural Science Advances that research at the University of Illinois, Xerion Advanced Battery Corporation and Nanjing University in China developed a method for electroplating lithium-ion battery cathodes, yielding high-quality, high-performance battery materials that could also open the door to flexible and solid-state batteries in May,2017. Paul V. Braun, a professor of materials science and engineering and director of the Frederick Seitz Materials Research Lab at Illinois said that it's an entirely new approach to manufacturing battery cathodes, which resulted in batteries with previously unobtainable forms and functionalities. Traditional Lithium-ion BatteryTraditional lithium-ion battery cathodes use lithium-containing powders formed at high temperatures. The powder is mixed with gluelike binders and other additives into a slurry, which is spread on a thin sheet of aluminum foil and dried. The slurry layer needs to be thin, so the batteries are limited in how much energy they can store. The glue also limits performance. "The glue is not active. It doesn't contribute anything to the battery, and it gets in the way of electricity flowing in the battery," said co-author Hailong Ning, the director of research and development at Xerion Advanced Battery Corporation in Champaign, a startup company co-founded by Braun. The researchers bypassed the powder and glue process altogether by directly electroplating the lithium materials onto the aluminum foil claimed "You have all this inactive material taking up space inside the battery, while the whole world is trying to get more energy and power from the battery". The Electroplated CathodeSince the electroplated cathode doesn't have any glue taking up space, it packs in 30% more energy than a conventional cathode, according to the paper. It can charge and discharge faster as well, since the current can pass directly through it and not have to navigate around the inactive glue or through the slurry's porous structure. It also has the advantage of being more stable. What's more, the electroplating process creates pure cathode materials, even from impure starting ingredients. This means that manufacturers can use materials lower in cost and quality and the end product will still be high in performance, eliminating the need to start with expensive materials already brought up to battery grade, Braun said.  "This method opens the door to flexible and three-dimensional battery cathodes, since electroplating involves dipping the substrate in a liquid bath to coat it," said co-author Huigang Zhang, a former senior scientist at Xerion who is now a professor at Nanjing University. The researchers demonstrated the technique on carbon foam, a lightweight, inexpensive material, making cathodes that were much thicker than conventional slurries. They also demonstrated it on foils and surfaces with different textures, shapes and flexibility.These designs are impossible to achieve by conventional processes,however,what's really important is that it's a high-performance material and that it's nearly solid. By using a solid electrode rather than a porous one, more energy can be stored in a given volume. One of the day, people want batteries to store a lot of energy and peple will make this thought come true. 

A Tomsk Polytechnic University study reveals how topological vortices found in low-dimensional materials can be both displaced and erased and restored again by the electrical field within nanoparticles. This may open exciting opportunities for memory devices or quantum computers in which information will be encrypted in the characteristics of topological vortices.(Vortices in nanoparticles exposed by the electrical field. Credit: Tomsk Polytechnic University (TPU))Scientists from TPU and international collaborators have discovered unusual self-organization of atoms in the volume of nanoparticles and have learned to control it via an electric field. Such controlled nanoparticles can be used to generate capacious non-volatile random access memory (NRAM), quantum computers and other next-generation electronics. The main author is Dmitriy Karpov, engineer of the Department of General Physics, TPU, who explains that in modern materials science, the defects of matter are divided into two large groups. The first group includes classical, well-studied defects, when atoms in matter are mechanically disordered, i.e., atoms are either removed or inserted into the lattice. In the other group, the spatial organization of the lattice itself changes and such defects are called topological. Topological defects can strongly influence matter, making it superfluid or superconductive, and therefore, it is very important to study them. Topological defects can be found only in low-dimensional materials—two-dimensional nanorods and nanofilms (just several atoms thick) and one-dimensional nanodots or nanoparticles, which are spherical particles consisting of several tens or hundreds of identical atoms. "One of the important topological defects is a topological vortex which looks like a discernible twisting caused by a small displacement of all atoms. The vortex core is a nanostrand which can be both displaced by the field, and erased and restored again within nanoparticles," explains Edwin Fohtung, Professor of Los Alamos National Laboratory and New Mexico State University . The scientists studied barium titanate nanoparticles whose internal structure was visualized with the help of penetrating X-ray radiation from the synchrotron Advanced Photon Source (Chicago, USA). They obtained an image of the volume of nanoparticles with a resolution of 18 nanometers, which enabled them to analyze the slightest changes in the structure. As a result, the researchers showed that an external electric field can displace the core of the topological vortex inside the nanoparticle, and when the field is removed, it returns to its original position. Modern components of electronics are gradually becoming smaller. This can significantly influence the efficiency of devices, which will be significantly reduced due to quantum effects. One way to circumvent these limitations is to use topological vortices. Thus, they can be used to generate high density NRAM or quantum computers in which information will be encrypted in the characteristics of topological vortices. "All in all, the possibility to control and adjust topological vortices in nanoparticles is important for the creation of new electronics," concludes Dmitriy Karpov. Further reading>>>Topological defectA topological defect can be proven to exist[when?] because the boundary conditions entail the existence of homotopically distinct solutions. Typically, this occurs because the boundary on which the conditions are specified has a non-trivial homotopy group which is preserved in differential equations; the solutions to the differential equations are then topologically distinct, and are classified by their homotopy class. Topological defects are not only stable against small perturbations, but cannot decay or be undone or be de-tangled, precisely because there is no continuous transformation that will map them (homotopically) to a uniform or "trivial" solution. Reference>>>KY259-BB910KY259-CXA1512MKY32-K9T1G08U0M-YIBO 

An entirely new model of the way electrons are briefly trapped and released in tiny electronic devices suggests that a long-accepted, industry-wide view is just plain wrong about the way these captured electrons affect the behavior of hardware components such as flash memory cells. The model which devised by scientists at the National Institute of Standards and Technology (abbreviation NIST),a measurement standards laboratory, and a non-regulatory agency of the United States Department of Commerce and its mission is to promote innovation and industrial competitiveness, was test to explain how electron capture and emission creates the insidious nosise that increasingly threatens performance as electronic devices continue to shrink in size.   KIN Cheung, NIST researcher Kin Cheung also the lead author of a new report in IEEE Transactions on Electron Devices said "Such a burst noise,popcorn noise or random telegraph noise(abbreviation RTN) have become a major problem for extremely small devicess". Charge trapping is one of the known causes of flash memory failure. The new model, which NIST physicist John Kramar called "a major paradigm shift in charge-trapping modeling," could lead to a different approach to manage this problem, and potentially, a new way of making the memory cells smaller. John Kramar explained:" Charge trapping is one of the known causes of flash memory failure,the new model whicl I called it a major paradigm shift in charge-trapping modeling,could lead to a different approach to manage this problem,and potentially,a new way of making the memory cells smaller.  What is RTN noise? RTN noise consists of abrupt random drops in voltage or current caused by itinerant electrons that are briefly captured from, and then rejoin, the main flow along a current channel in, for example, a common type of transistor called a MOSFET. "The effect was mostly negligible back in the good old days when devices were larger and there were lots of electrons flowing around," Cheung said. But in today's advanced devices, with feature dimensions in the range of 10 nanometers (nm, billionths of a meter) or less, the active area is so small that it can be swamped by a single trapped charge. "As you get down to the very smallest sizes, RTN can be nearly 100 percent as strong as the signal you're trying to measure," Cheung said. "In those conditions, reliability disappears." In the case of RTN, the basics are known: The noise is caused by the action of electrons near the interface between two materials such as an insulator layer and the bulk of the semiconductor in a transistor. Specifically, an electron is pulled out of the current flow and trapped in a defect in the insulator; after a short time, it is emitted back into the main current in the semiconductor. What actually happens on the atomic scale at each stage of the process, however, is incompletely understood. The orthodox approach to account for those effects is to treat all the trapped electrons as a single 2-D sheet of charge that extends uniformly across the center of the insulator. Each emitted electron is thought to return to the semiconductor in a reverse of the same process by which it was captured, causing very little change in the presumably stable state along the insulator/semiconductor boundary. The model is suitable for very small devices,however,it didn't make sense to the NIST scientists. Among other difficulties, it ignored the fact that, once they are immobilized, electrons cause considerable distortions in local electrical field conditions along the boundary, affecting current flow. "We're saying the traditional way doesn't really work," Cheung said. "You have to rethink this thing. The old model doesn't make reasonable assumptions about how charge carriers behave." The researchers proposed a new model, based on local effects, in which the mechanisms of capture and emission are dramatically different from the standard picture. For one thing, they determined that quantum mechanics, the modern theory that describes the behavior of these systems, makes it hugely improbable, if not impossible, for electrons to get out of the insulator the same way they got in. "It's like a highway where there is an exit ramp, but there's no on ramp," says NIST co-author Jason Campbell. "You can go in, but you can't come back that way. You've got to come back a different way. That is, there is a set of rules for capture that don't apply to emission." "When you realize that the capture and emission processes are decoupled," Cheung added, "you quickly have a very different view of the problem."  The standard RTN picture supposes a weak interaction of trapped charge with its local surroundings―in this case, the highly separated electric charge in the silicon dioxide that often makes up the insulator layer in a transistor. NIST scientists found that a weak interaction is inconsistent with known physics and not in agreement with reports from two independent laboratories. Indeed, the interaction energy of a captured electron can be more than 10 times greater than previously believed. Recognition of this stronger interaction energy enables the new local field picture to explain RTN naturally. The success of the new model, and the resulting drastic change in the understanding of both capture and emission, suggested that many long-held ideas would have to be thoroughly reconsidered. "It's a very scary and very unsetting conclusion,I mean,this is tear-up-the textbook stuff." Campbell said. As an end, NIST researchers hope the new model will help chip engineers and designers understand in much greater detail how devices degrade and hat will be required to get to the next stage of miniaturization while maintaining reliability and reducing noise. 

(This is a high precision control of printed electronics.)Printed electronic transistor circuits and displays, in which the colour of individual pixels can be changed, are two of many applications of ground-breaking research at the Laboratory of Organic Electronics, Linköping University. New groundbreaking results on these topics have been published in the scientific journal Science Advances. The researchers in organic electronics have a favourite material to work with: the conducting polymer PEDOT:PSS, which conducts both electrons and ions. Displays and transistors manufactured from this polymer have many advantages, which include that they are simple and cheap to manufacture, and the material itself is non-hazardous. It has, however, been difficult to create devices that switch rapidly at a specific voltage, known as the "threshold voltage." This gives that it has, so far, been difficult to control the current state of the transistors or the color state of the displays in a precise manner. "The lack of any threshold in the redox-switching characteristics of PEDOT:PSS hampers bistability and rectification, characteristics that would allow for passive matrix addressing in display or memory functionality" says Simone Fabiano, senior lecturer at the Laboratory of Organic Electronics, LOE, who is the principal author of the article in Science Advances, together with Negar Sani from the research institute RISE Acreo. More than five years ago a wild idea arose at the Laboratory of Organic Electronics: could you solve this problem by combining electrochemistry with ferroelectricity? Ferroelectric materials consist of dipoles. One end of a dipole has a positive charge and the other a negative charge, and these "ferroelectric" dipoles rotate when they are exposed to an electric field beyond a specific threshold. Head of the laboratory Professor Magnus Berggren couldn't let this idea rest, and when he was awarded a research grant from the Knut and Alice Wallenberg Foundation in December 2012 to use freely, this was one of the high-risk projects he chose to invest in. "We called the research then breakneck research, and here is a result. Our demonstration proves that truly leading research typically take a long time and require considerable patience. Simone Fabiano has done tremendous work here, and refused to give up when others have doubted," says Magnus Berggren. After many years of tenacious experiments, Simone Fabiano and his colleagues at the Laboratory of Organic Electronics have managed to apply a thin layer of a ferroelectric material onto one electrode in organic electrochemical devices and circuits. "The thickness of the layer determines the voltage at which the circuit switches or the display changes colour. Transistors are no longer required in the displays: we can control them pixel-by-pixel simply through a thin ferroelectric layer on the electrode," says Simone Fabiano. The LOE research group shows in the article that "ferroelectrochemistry," the combination of ferroelectricity and electrochemistry, can be used in displays in the field of printed electronics and in organic transistors. The scientists envisage, however, many other areas of application. "Ferroelectrochemical components can easily be integrated into memory matrices and into bioelectronic applications, just to give a couple of examples," says Simone Fabiano. The technology is now protected by patents. "The field of ferroelectrochemistry doesn't actually exist, but we have achieved success using this combination," Magnus Berggren concludes. Ref.KY56-2SA1987KY56-KSC5024RTUKY56-FJI5603D 

Tokyo Tech researchers demonstrate operation energy-savings in a low price silicon power transistor structure by scaling down in all three dimensions. In electronics, lower power consumption leads to operation cost savings, environmental benefits and the convenience advantages from longer running devices. While progress in energy efficiencies has been reported with alternative materials such as SiC and GaN, energy-savings in the standard inexpensive and widely used silicon devices are still keenly sought.K Tsutsui at Tokyo Institute of Technology and colleagues in Japan have now shown that by scaling down size parameters in all three dimensions their device they can achieve significant energy savings.Tsutsui and colleagues studied silicon insulated gate bipolar transistors (IGBTs), a fast-operating switch that features in a number of every day appliances. While the efficiency of IGBTs is good, reducing the ON resistance, or the voltage from collector to emitter required for saturation (Vce(sat)), could help increase the energy efficiency of these devices further.Previous investigations have highlighted that increases in the “injection enhancement (IE) effect”, which give rise to more charge carriers, leads to a reduction in Vce(sat). Although this has been achieved by reducing the mesa width in the device structure, the mesa resistance was thereby increased as well.Reducing the mesa height could help counter the increased resistance but is prone to impeding the (IE) effect. Instead the researchers reduced the mesa width, gate length, and the oxide thickness in the MOSFET to increase the IE effect and so reduce Vce(sat) from 1.70 to 1.26 V. With these alterations the researchers also used a reduced gate voltage, which has advantages for CMOS integration.They conclude, “It was experimentally confirmed for the first time that significant Vce(sat) reduction can be achieved by scaling the IGBT both in the lateral and vertical dimensions with a decrease in the gate voltage.”These are three terminal devices used as switches or rectifiers. With simple gate-drive characteristics and high-current and low-saturation-voltage capabilities they combine the benefits of two other types of transistors - metal-oxide-semiconductor field effect transistors (MOSFETs) and bipolar transistors.The researchers reduced the mesa width, gate length, and the oxide thickness in the MOSFET by a factor of 1/k, and compared devices with values of 1 and 3 for k. Because the fabrication of narrow mesas can cause problems they also reduced the trench depth by 1/k.Although this has a slightly negative effect on the IE effect, it has considerable benefits for fabrication ease and cost and the dependence of (Vce(sat)) on the trench depth was deemed to be small. The gate voltage was also decreased by a factor of 1/k, while the cell pitch was maintained at 16 μm.Reference:2SA1987C4706FJA4213RTU