China's Semiconductor Lighting Technology Driven Road Gradually
The first LED is only 60 years born in the last century
, after 30 years of development, the Chinese LED industry has experienced buying the device, to buy chips, buy a wafer after the road has been initially realized the self-production of epitaxial wafers and chips to form a relatively complete industrial chain.
Industrial chain formed
The first commercial LED appeared in 1968, the first GaP (Gallium Phosphide), GaAsP (gallium arsenic phosphide) red, yellow, green LED lights began to be used, numbers and text. Next decade, high-brightness, full-color LED technology has become a major issue. Toshiba 1991, HP company has developed into the United States quaternary orange, yellow, yellow-green high brightness LED. Nichia Corporation of Japan in 1994, developed into a GaN (gallium nitride) blue-green LED. In 1995, high-brightness blue and green LED have mass production, so LED's emission wavelength from red to blue, covering the entire visible spectrum, and has up to 30% of the luminous efficiency. Followed the successful development of white LED, LED greatly expands the application field of the formation of a sunrise from the beginning of the LED lighting industry, infinite.
China LED's development started in the 20th century, 60s. November 1970 held in Shanghai in the national academic conference on gallium arsenide, the report vapor epitaxy using a "red GaAsP light-emitting diode," research results from our R & D LED materials and devices officially started. Formed in 80 of 20 century, LED, LED industry has begun to take shape 90 years, has been the rapid development of the late 90s.
Early stage companies are mostly domestic LED packaging companies, chip all imported from abroad. During this period the main industry to package products are mainly used for signals, signs, digital display etc.. 1998 National "Ninth Five-Year" technical transformation so that 746 factory in Nanchang Yan Lei optical company formed to produce general light LED chip 1 billion. 1999 Hebei Department of Electronics and Hebei to leader electronics companies were built InGaAlP high brightness LED epitaxial wafers and chips production line, annual output can reach 10,000 wafer and chip 100 million, thus changing our LED epitaxial wafers and chips all situation of dependence on imports.
China LED technology development is inseparable from the key research institutes. In 1997, the National Natural Science Foundation support, Peking University first developed the first domestic only blue light emitting diodes. Nanchang University a few years successfully developed the world's first silicon substrate blue LED chip production materials and technology, mass production, became the third country with independent intellectual property rights LED epitaxial materials and chip technology route.
China's LED industry has been importing device sales?? Imports chip package?? Imports made of silicon wafer and package?? Independent production of epitaxial wafers, chip and device four stages. The reason why China's LED industry achieved so much success, the causes of many aspects: first, the optical surface to expand product applications, market supply and demand contradiction, lack of industrial scale, short supply, companies need to expand production capacity, the development of industrial economy. Second, the reform and opening up opportunities for development. The rapid development of LED industry in Taiwan, a large number of chip exports to the mainland, plus LED packaging technology matures, new businesses involved in China packaging industry form the overall industrial and economic expansion. Third, the government has increased efforts to support industry development. Semiconductor plant in Changchun, 746 state-owned factory, Suzhou Semiconductor Plant has technological transformation, and integration with the research institutions, and achieved good results. Fourth, the market's rapid growth makes it difficult to meet the needs of transformation continent alone, thus a large number of chips from China, Taiwan, Japan imports, which in turn promoted the development of LED packaging. Fifth, the industry in general to reach a consensus, the development of China's optoelectronics industry needs to implement three combinations: combination of investors and enterprises, research and enterprise integration, cross-strait integration technology and resources. Sixth, the international LED technology has developed rapidly, quaternary, GaN, and white LED's available to promote the LED industry. LED is also included in the "863", so that LED industry to flourish.
After 30 years of development, China's LED industry has achieved an initial self-production of epitaxial wafers and chips to form a relatively complete industrial chain. Major R & D units, Peking University, Tsinghua University, Chinese Academy of Sciences Institute of Semiconductors, Nanchang University, Institute for the CLP Group 13, Institute of Physics, South China Normal University, Xiamen University, Shandong University, Nanjing University; extension of the major chip production plant There Xiamen security, the United States Dalian Road, Shanghai Blue, Sapphire Shanghai, Shandong Huaguang, Shenzhen side large, Hangzhou Shi Lanming core, Jiangxi joint creation, Nanchang, Yan Lei, the Shanghai Morning, etc.; packaging and application of the major manufacturers have Xiamen Hualian, Foshan, China Star, Ningbo l spectrum, Jiangsu steady profit, Guangzhou Hongli, Tianjin Star, Hebei Xin Gu, Shanghai, think twice, Beijing, Riyadh, Shenzhen, China Star and other rule.
The number of people currently engaged in LED industry more than 30 million people, more than 2,000 enterprises, including extension and more than 40 chip manufacturers, packaging companies 600, LED applications and supporting more than 1000. 2007, China's output of 46 billion LED chip production 36 billion, of which 21 billion high-brightness chip, device and module production value reached 22 billion yuan.
China's Semiconductor Lighting Technology Driven Road Gradually
By: frbiz2@163.com
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