Peng Wanhua: high brightness LED still need to take advantage of the industrial policy foundation

From the last century, high brightness LED (GaN based product red, orange and yellow light four yuan of products and green, purple and blue) since the advent, after ten years of hard work, high brightness LED has entered the functional lighting field, and will gradually enter the field of general lighting, has formed a complete industrial chain much of the rest of the world, and the international companies pay attention to. China is also following the world's cutting-edge technology, accelerate the development and industrialization, has a certain industrial base.

The initial formation of LED industry chain in China

According to the statistics and calculation of China optical photonics Optoelectronics Industry Association Branch, and then provide reference of the relevant domestic institutions engaged in LED data, in 2007 the National more than 2 thousand enterprises, engaged in the research and production of epitaxial growth, chip manufacturing device package has more than and 40 units, about 600 enterprises, packaging companies which have a certain scale of about 100. Application products and supporting enterprises have more than 1 thousand and 700. Industry employment of about ten people (otherwise the statistical estimate is 300 thousand ~ 400 thousand people), from raw materials, epitaxial growth, chip manufacturing, packaging to the application materials, products and supporting equipment, has formed a complete industrial chain. In recent years, China's LED chips and devices, especially high brightness LED chips and devices are growing rapidly.

Epitaxy and chip technology breakthrough

The core technology of LED is the epitaxial growth of LED and the chip manufacturing technology. In recent years, the government and the relevant research institutions attach great importance to this, put a lot of money and manpower to research, development and industrialization. The main research institutions with Peking University and Tsinghua University, Nanchang University, University of Beijing, Shandong University, Nanjing University, South China Normal University, Xiamen University, Shenzhen University, South China University of science and technology, semiconductor Institute of Chinese Academy of Sciences, Institute of physics, 13, 55 in the newly established Chinese Academy of Sciences and semiconductor lighting research center. In epitaxial growth, chip manufacturing and carry out a number of research achievements, such as on different substrates (Al2O3, Si, SiC, AlN, GaN) growth of GaN materials, epitaxial patterned substrate epitaxy, nonpolar and semipolar heteroepitaxy, substrate transfer, laser ablation, eutectic welding, surface electrode, ITO coarsening and photonic crystals, improve the internal quantum efficiency and external quantum efficiency, achieved good results. In addition, China has developed a AlGaN deep ultraviolet light emitting diodes (260nm ~ 400nm), have also developed the LED blue chip 1W, a luminous efficiency of white LED more than 80lm/W, and developed a four yuan red line AlGaInP power LED device, the luminous efficiency of about 40lm/W. Nanchang University developed with independent intellectual property rights on the Si substrate growth GaN, and make blue, green LED chip, has been realized industrialization.

The growth of LED and major enterprises of chip manufacturing in Xiamen, Dalian Road, Shanghai three beautiful blue, Shanghai Blaupunkt, Shandong, Hangzhou, Jiangxi Huaguang Silan azure latticepower, Hebei, Shenyang, Xiamen Tong Hui, Jiangxi LIAN, Nanchang dry according to Xin Lei, Shanghai morning, Shanghai Yu body, Shenzhen century Jingyuan Shenzhen Orient, Yangzhou Huaxia integration, Langfang core, Gansu Xintian electric, Wuhan, Xi'an, to source di Guangzhou Puguang, Dongguan blessed, and foreign-funded enterprises in Wuhan, Xiamen Huacan Jingyu, informed the Xiamen and Jinjiang crystal blue a total of more than and 20 enterprises, these enterprises in the improvement of chip structure and craftwork a lot of work to improve product performance, yield, improve the anti decay ability and reliability and repeatability of the process, has made great achievements, to protect the chip for mass production. Production. In 2007, domestic production of high brightness chip more than 21 billion, the growth rate was 75%, of which the green and blue chip is about 6 billion 500 million, the growth rate of 62.5%, is expected in 2008 high brightness LED chip production will be more than 30 billion, including blue, green chips about 8 billion ~ 10 billion.

Device packaging and supporting capabilities

The characteristics of domestic LED packaging enterprises is of small size and number, about 500 to 600, with a certain scale, more than 10 million yuan in annual sales of about 100 enterprises, the main packaging enterprises have Xiamen Hualian, Foshan star, Jiangsu Wenrun, Guangzhou Hongli, Ningbo, Jiangxi LIAN, Tianjin Shengpu star, Langfang Segotep, Shenzhen, Shenzhen, Shenzhen Ruifeng Lehman, quantum Zhuhai lifine etc.. 2007 national packaging devices up to 46 billion, plus foreign companies, the domestic LED packaging capacity of more than 60 billion / year. Can the device package contains complete varieties, single pipe, composite pipe, pixel tube, digital display, backlight, SMD-LED, micro LED, matrix display, special display, white LED, power LED and power LED module, the larger investment in R & D efforts with the strength of the packaging enterprise, in the improvement of package structure, improve the heat dissipation performance and improve the light efficiency, improve the anti decay and reliability have achieved very good results, we can batch package 1W LED, the luminous efficiency of 100lm/W, the thermal resistance can be controlled within 10 DEG /W. China Electric Power 13 developed with independent property rights of high-power LED packaging products, in addition, also developed with independent property rights of the vertical structure of non welding line power LED packaging new products for the power LED packaging industry to contribute.

Domestic LED packaging materials and accessories supporting ability is very strong, in addition to individual materials, the vast majority of materials are provided for the domestic, mainly gold, silicon aluminum wire, epoxy resin, silica gel, silver paste, conductive adhesive, bracket, strip, plastic parts, packaging mold and fixture, has formed a certain the scale of enterprises, mainly in the Pearl River Delta and the Ningbo region. In addition, for the packaging of white LED phosphor used, there are more than a dozen domestic enterprises are research and production, has been