High brightness LED chip market pattern and development analysis

High brightness LED chip market pattern and development analysis

High brightness LED is mainly divided into GaAs system and AlGaAs system of infrared light, AlGaInP system of red, orange, yellow and green, InGaN system of green and blue, and GaN and AlGaN system of ultraviolet light. At present, the blue light efficiency of InGaN system has been high, and combined with the red and yellow light of the quaternary system, it has been widely used in lighting, backlight, display, traffic indicators and other fields. Uv LED has a broad market application prospect, semiconductor UV light source in lighting, sterilization, medical, printing, biochemical detection, high-density information storage and secure communication and other fields have great application value. Infrared LED mainly includes infrared LED with peak wavelength from 850nm to 940nm, which is widely used in remote controls, drives, computer mice, sensors, security equipment and display backlight, etc. The driving force for the continuous growth of infrared LED demand mainly comes from household appliances, security systems and wireless communication products.

The application of white light is an important market of blue LED chips and also the most important development direction. It adopts blue light chip and YAG yellow phosphor to form white light source. At present, the international LED companies has more obvious advantages in high power blue chips, and LED chip companies at present mainly in the domestic small and medium-sized power blue chips have larger development, but because of a few years ago caused the excess production capacity, excessive investment in small and medium-sized power blue chip market appeared serious "price war". For blue LED chips, the main development direction is silicon LED chips, high voltage LED chips, flip LED chips and so on. For the small and medium power LED chip market, the current mainstream market trend is 0.2-0.5W market, package forms include 2835, 5630 and COB package. For other segments, such as vertical structure chips, packaging can be applied to directional lighting applications, such as flashlight, miner's lamp, flash, spot lamp and other lamp products.

Silicon - based LED chips are attracting more and more attention

At present, the mainstream blu-ray chips in the market are generally grown on sapphire substrate, which is represented by Japan Riya Company. In addition, there is also a blue chip is grown on silicon carbide substrate, represented by the American Crease company.

In recent years, blue LED chips grown on silicon substrates have attracted more and more attention. Silicon substrate can use the automatic production line of IC factory, it is easier to adopt the mature process of 6 inch and 8 inch line of IC factory at present, coupled with the relatively low cost of large silicon substrate, so the cost of silicon substrate LED chip is expected to drop significantly in the future, but also can promote the rapid penetration of semiconductor lighting. Silicon based LED chips have the following characteristics:

● Vertical structure, using silver mirror mirror, can make the current distribution more uniform, so as to achieve high current drive;

● Good heat dissipation of silicon substrate is conducive to chip heat dissipation;

● Lambert luminescence morphology, uniform light, easy to carry out secondary optics;

● Suitable for ceramic substrate packaging;

● Suitable for LED flash and directional lighting applications for indoor, outdoor and portable lighting markets.

In the development of silicon-based LED chips, Jingneng has launched low-power silicon-based LED chips in 2009, which are widely used in the field of digital display. In June 2012, Jingneng released a new generation of high-power silicon-based LED chips in Guangzhou, which attracted great attention from the LED industry at home and abroad. It launched four silicon-based high-power LED chips, including 28mil, 35mil, 45mil and 55mil, among which 45mil chip reached 120lm/ W light efficiency. And reached 130 lm/ W by the end of the year with good reliability. Silicon LED chip ceramic packaging, compared with the internationally known products, has a good cost performance, aroused great interest in sealing plants and LED lamp factories at home and abroad. It is reported that Sharp and Puri also announced at the end of 2012 to achieve the silicon substrate white chip mass production, launched two white chip; In addition, including Samsung, Osram, JIC and other large companies are also actively engaged in the research of silicon based LED chips.

LED market is in the stage of rapid development, the further reduction of LED chip cost will promote semiconductor lighting into the family. Because silicon substrate has the characteristics of low cost and mature IC factory manufacturing process, with the continuous development of 6-12 inch large-size silicon LED technology, silicon LED technology will have a huge advantage in reducing cost and improving production efficiency, which will have a significant impact on the LED industry.

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