Led industrial scale high brightness chip fast growth

Editor's note: three has the advantages of high brightness and white LED is a prominent energy saving and environmental protection, long service life, thus expanding applications, has entered the field of special lighting, so both at home and abroad put greatefforts to research and industrialization. The development of foreign LED technology and industry, in recent years, the development is very rapid, especially in blue light, white light, power LED and application have a greater breakthrough. But are concentrated in a few large corporations, such as TOYOTA, Japan's Nichia synthesis company, the United States Gree, Lumileds company and Osram company of Germany. They applied for more than 10 thousand patents on LED, forming a high degree of technical monopoly. In the development of LED industry, South Korea and China's Taiwan development very quickly, they catch up from behind, LED accounted for more than 30% of the total output of the world. Currently the largest output of LED is japan. In recent years, the enterprise of the state and the local government and the importance of the University, and the related research of LED industry, both in the capital, manpower, investment is large, in the LED technology research and industrialization have great development, but with foreign advanced level there is still a certain gap.

Two kinds of high brightness LED growth rate of more than 50% in recent years the development of China's mainland LED industry rapid development, dynamic and high brightness white LED striking. High brightness white LED refers to four yuan AlGaInP red, orange, yellow, green and blue GaN based LED, LED and UV, violet from blue (or purple, UV) chip and phosphor or by the combination of multi chip white LED and the two kinds of high brightness LED in recent years. The mainland of China is developing very rapidly, the growth rate of more than 50%. According to the statistics and analysis of China optical photonics Optoelectronics Industry Association Branch estimates, in 2005 the national enterprises engaged in LED (excluding foreign-invested enterprises) about more than 2 thousand, the extension, the chip R & D and production units have more than and 30, package of about 600 enterprises, with products and supporting enterprises more than 1 thousand and 600. From LED raw materials, epitaxy, chip, packaging, application and related accessories, equipment, etc., has formed a relatively complete LED industry chain. Whether it is a high brightness chip or device, the speed of development is very fast, the growth rate of more than 100% and 50%.

The core technology of high brightness chip production will exceed 12 billion LED is epitaxy, chip manufacturing technology, especially the core technology of high brightness LED and power LED. The enterprise of relevant government departments and relevant universities, and attach great importance to invest a lot of money, manpower to research, development and industrialization, the major research institutions with Peking University and Tsinghua University, Nanchang University, Institute of semiconductors, physics, electric 13, Southern China Normal University, Beijing University, Shenzhen University, Shandong University, Nanjing University, in the main technical solution on silicon substrate GaN epitaxial growth layer, GaN based blue light wavelength drift and improve the internal quantum efficiency and light efficiency, improve the anti decay ability and power chip heat dissipation level and so on.

Has now developed the power LED chip of 1W industrialization, the luminous efficiency is 30lm ~ 40lm/W, up to 47.5lm/W, a single device transmitting power 150mW, up to 189mW. In recent years, Nanchang University has carried out the research of GaN epitaxial materials grown on silicon substrate, and the results have made breakthrough progress, recently passed the "863" project acceptance, and access to a number of independent property rights of international invention patents. Blue chip has been developed to transmit power up to 7mW ~ 8mW, preferably from 9mW to 10mW, the chip yield of 80%, the power of the LED chip in the 350mA transmit power of 100mW ~ 150mW, preferably up to 150mW. Electricity test in 500mA, 1000 hours, less than 5% of the light blue.

The main business domestic LED chip extension, are: Xiamen, Dalian, Shenzhen three road beauty side, Shanghai blue, Shanghai Blaupunkt, Jiangxi LIAN, Shandong Huaguang, Nanchang Xin Lei, Shanghai Golden Bridge, Hebei Lide, Hebei morning, Shenzhen Orient, Shenzhen Huineng century Jingyuan, Guangzhou Puguang, Hangzhou scholar blue Ming Yang core, Huaxia integration, Gansu Xintian electric company. These enterprises have a lot of work in the development and improvement of technology in recent years, done a lot of work in improving the product performance, yield, process repeatability, anti decay and reliability, has achieved good results, to protect the LED chip production.