The full name thyratron, commonly known as thyristor, is a bistable power electronic device that contains 3 or more PN junctions that can switch from off-state to on-state or from on-state to off-state. It refers to all PNPN type switches and can also refer to any device in this type of switch. Since the United States Bell Telephone Laboratory used the first thyristor in the industry in 1957, due to its excellent performance, it has quickly received attention from various countries. With the...
With the development of technology, the soldering (adhesion) techniques of chips have also become more and more sophisticated. The failure of soldering (adhesion) of semiconductor devices is mainly related to poor cleanliness, unevenness, oxides, improper heating, and substrate plating quality. The resin paste method is also constrained and influenced by the composition of the adhesive and its related physical and mechanical properties. To solve the problem of poor micro soldering, we must...
LEDC editor Mizyhe reports: Kaai is a manufacturer of InGaN green and blue lasers for consumer applications, and recently demonstrated a green laser diode based on non-polar and semi-polar GaN substrates. The operating wavelength is 523 nm (continuous wave). It is reported that this is a green laser diode that operates at the longest wavelength in the continuous wave state. In consumer projection displays, safety indicators and lighting, physiology, industrial imaging, etc., collimated green...
Abstract: In order to shorten the reverse recovery time, traditional fast recovery diodes usually use electron irradiation to reduce the minority carrier lifetime in the base region. However, electron irradiation reduces the device's reverse recovery time and also makes the on-state voltage Increased. In this paper, the dual-proton irradiation localized lifetime control method is used to simulate the characteristics of the diode using SILVACO software. The different locations of the local low...
On November 29, when BOE A answered an investor's question on the interactive platform, the Micro LED was a new generation of display technology. The structure was that the miniaturized LED array inherited the characteristics of the LED and the advantages of the Micro LED. Including low power consumption, high brightness, fast response and so on. However, because the technology is not mature yet, it needs a period of development. At present, our company has carried out technical research on...
In 011, the company achieved operating income of 1.037 billion yuan, a year-on-year increase of 27.6%; The operating profit was 128 million yuan, an increase of 47.21% year-on-year; the net profit attributable to the parent company owner was 104 million yuan, a year-on-year increase of 21.43%; the basic earnings per share was 0.6530 yuan/share, and the profit distribution plan was to increase 3 shares for every 10 shares. The company's main business revenue in 2011 was 1.037 billion yuan, a...
When the thyristor damage need to check the analysis of the reasons, the core can be removed from the cooling jacket, open the core box and then remove the chip, observe the signs of damage to determine what is the reason. The following are some common causes of thyristor damage to determine the method: Voltage breakdown Thyristor can not withstand the damage due to voltage, the chip has a smooth hole, and sometimes need to use magnifying glass to see. The reason may be due to the tube itself...
1. MOS tube switching circuit learned analog circuits, people know that the transistor is a flow control device, which is the base current control collector and emitter current; and MOS tube is a voltage control device, which is The voltage applied to the gate controls the current between the drain and the source. The MOSFET is a kind of FET and can be manufactured as an enhancement type or a depletion type. There are four types of P-channel or N-channel, but only the enhanced N-channel MOS...
Prof. Sheng Liu from the School of Science and Technology Dynamics and Mechanics made new progress in the field of high-efficiency flip-chip light-emitting diodes (LEDs). Research results were published in Optics Express, a leading journal in the field of optics. The paper entitled Numerical and experimental investigation of GaN-based flip-chip light-emitting diodes with highly reflective Ag/TiW and ITO/DBR Ohmic Contacts (Numerical Simulation and Experimental Study of High-Efficiency Gallium...
Nakazaki, a Japanese professor, has won the Nobel Prize for the development of blue light-emitting diodes (LEDs). His research team is currently working on the next-generation optical device laser diode (LD) that goes beyond LEDs. LD can greatly improve energy efficiency and is used in many fields such as medical lasers and information communication. Currently, medical applications have been partially implemented. However, due to the lack of efficiency and cost, the popularity is limited to a...
Development of Ferroelectric Cathode Vacuum Diode Test Device for Strong Emission Current Core Tip: The ferroelectric cathode (also called cold cathode) material is a new type of functional material that obtains pulsed high-current electron emission from the surface of a ferroelectric material under the excitation of a pulsed high voltage or a strong laser. The electron beam emitted from the surface of the ferroelectric cathode has the characteristics of excellent quality, electrically...
Diodes, also known as crystal diodes, are referred to as diodes. In addition, there are early vacuum electronic diodes; they are electronic devices with unidirectional conduction currents. Inside the semiconductor diode there is a PN junction with two lead terminals. This kind of electronic device has a unidirectional current transducing property according to the direction of the applied voltage. In general, a crystal diode is a pn junction interface formed by sintering a p-type semiconductor...
(Fuzhou Xie Telai Lighting Co., Ltd., Fuzhou 350014) Abstract: LED refers to light-emitting diodes, LEDs have inorganic light-emitting diodes (ILEDs), organic light-emitting diodes (OLEDs), and ILEDs and OLEDs are collectively referred to as solid-state light-emitting diodes. GLED refers to gas light-emitting diodes with a new wick structure and working mechanism. Key words positive halo discharge hollow cathode discharge GLED 1 Introduction People always want to use fluorescent lamps like...
1. Identification of zener diodes in the circuit: zener diodes are commonly used in circuits with “ZD” plus digital representation, such as: ZD1 denotes a regulator with a number of 1. 2. Identification of zener diodes _ positive and negative electrode identification From the appearance point of view, the positive terminal of the metal package zener diode body has a planar shape, and the negative electrode end has a semicircular surface shape. One end of the plastic zener diode printed with a...
Now that technology is developing rapidly, this article will give you an in-depth explanation of the transient pulse effect analysis of the one-way TVS diode SMBJ16A . I hope it will help you. The best way to handle transient damage to the device is to direct the instantaneous current away from the sensitive device. The TVS diode is connected in parallel with the protected line on the circuit board. When the instantaneous voltage exceeds the normal operating voltage of the circuit, the TVS...
Linear Technology announces the introduction of the LT3497, a dual, full-featured, step-up DC/DC converter that drives up to 12 white LEDs from a Li-Ion battery input. Its high efficiency, fixed frequency operation ensures consistent LED brightness and low noise and maximizes battery life. With an on-chip Schottky diode, no external diodes are required, saving cost and space. True Color PWMTM dimming achieves a dimming range of up to 250:1 without any color change in the LED. The LT3497's two...
I. Introducing violet laser technology into platemaking 1, Japan Nichia The Japanese company Nichia is the first supplier in the world to supply violet laser diodes. Nichia was founded in 1998. The original R&D concept was to develop diode lasers with shorter wavelengths than the infrared and red laser diodes that are already quite common on the market so as to further increase the storage capacity of the optical disks. Nichia was the first to successfully develop a violet laser with a...
The existing light emitting diode (LED) lamps in the market are both energy-saving and high-priced, but they are expensive. The European nanostructured semiconductor lighting research project participated by the University of Kassel in Germany is using the computer model to optimize the LED's light emitting structure. It is hoped that after a few years, a new type of LED lamp with low price and high brightness will be introduced. At present, LED technology is mainly used to produce automobile...
As an illumination source, OLEDs (organic light emitting diodes) have advantages of easy realization of white light, ultra-thin light sources, and light sources of arbitrary shapes. As a new type of solid-state light source, attention has been drawn to various countries for OLED lighting standards. In order to realize the integration of technical standards development with technological innovation and industrial development, the National Semiconductor Lighting Engineering R&D and Industry...
The Zener diode is a device made by utilizing the regulation performance exhibited by the reverse breakdown characteristics of the PN junction. Zener diodes, also known as Zener diodes or reverse-breakdown diodes, act as a stabilizing voltage in the circuit. It is characterized by the fact that the reverse voltage does not change with the reverse current in a certain reverse current range after the diode is reversely broken down. Zener diodes are typically fabricated from silicon semiconductor...
The Japan Institute of Physical Chemistry and the Agency for the Promotion of Science and Technology announced that a deep-ultraviolet light emitting diode (LED) with a wavelength of 250 nanometers developed by one of their research teams has successfully achieved a high output power of 15 milliwatts for the first time in the world, and its electron injection efficiency has improved. 80%. This deep ultraviolet light emitting diode is 7 times higher than the current highest output of the same...
ProTek Devices today introduced a new ultra-low capacitance steering diode/transient voltage suppressor array (TVS array). The new products mainly provide circuit protection for Gigabit Ethernet applications, smart phones, and graphics card interfaces. The new PAZC099 capacitor is ultra low, 0.9pF. The PAZC099 requires a rated voltage of 5.0 V for applications with a maximum pulse power of 100 watts per line (8/20 microseconds). The product also provides ideal circuit protection for USB 1.0,...
CREE Inc. (Nasdaq: CREE), a market leader in silicon carbide (SiC) power devices, announced a new series of packaged diodes. With the current silicon carbide Schottky diode technology, this series of diodes provides the highest blocking voltage in the industry. Cree 1700V Z-Rec? Schottky diodes fundamentally eliminate the reverse recovery losses present in silicon PiN diode replacements, enabling systems to achieve ultra-high efficiency with smaller, lighter and improved overall reliability....
On June 1, 2016, Intersil, a leading provider of innovative power management and precision analog solutions, announced the launch of the ISL78365 laser diode driver for automotive head-up display (HUD) systems. This highly integrated device drives up to 750mA of maximum current from four high-intensity laser diodes for projecting full-HD color video onto the windshield, with currents close to two of the competitor's solutions. Times. The ISL78365's higher current and faster switching speeds...
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