Across the technology gap LED pending 11th Five-Year"

LED is English LightEmittingDiode (light emitting diode) abbreviation, is used as the light source, LED has the advantages of energy saving, environmental protection and long life three advantages. As the world's largest producer of lighting appliances, the second largest exporter, China's LED lighting industry has broad market prospects. It is June 17, 2003 in this context, the Ministry of science and technology, China led the establishment of a cross sectoral, cross regional, cross industry "national semiconductor lighting project coordination leading group, to develop the implementation of the general principles of semiconductor lighting project in China, and put forward from the beginning of 2006, the" 11th Five-Year "national semiconductor lighting project as a a major project to promote.

Today, the Ministry of science and technology, Shanghai, Dalian, has been approved by Nanchang, Xiamen and Shenzhen as the industrial base, China's semiconductor lighting in the lights, landscape lighting, display lighting, architectural lighting and color lighting, and belongs to the special lighting vehicles such as automobiles and aircraft interior lighting, lamp, portable lamp field rapidly extended. However, standing on the eve of this new starting point in 2006, looking back at this kind of solid cold light source, which is all over the streets and lanes of the display screen, but clearly visible behind the technological gap of China's LED.

Upstream technology is difficult to overcome in the field of LED there are three main links: light-emitting semiconductor epitaxial wafer growth, chip and packaging. At present, there are three aspects of the development of the domestic, in the low-end application areas there is a certain foundation. But in the key link, especially the growth of epitaxial film, and world-class level there is still a big gap. From the perspective of the industry value chain, epitaxial film growth accounted for 70% of the value, it is the high quality epitaxial film has become the main constraints of the development of China's LED industry.

Due to the limitations of epitaxial film growth technology, the company is currently imported epitaxial film from Japan, but because it can not get the best products from abroad, which led to the chip products also remain in the low grade." Nanchang Xin Lei company - the country's largest LED chip manufacturer's sales management center, the person in charge told the China Intellectual Property News reporter interview. It is understood that the growth of epitaxial wafers need not only class MOCVD (metal organic chemical vapor deposition) device, more important is the growth of epitaxial wafer to 50 layer on the substrate material requirements, each layer of the epitaxial wafer and the substrate with the atomic arrangement. There are thousands of parameters involved in the production process, which requires a lot of time and money. As far as raw materials are concerned, the purity of raw materials is very high in the MOCVD production process, and many domestic raw materials are not up to the requirements. At present, there is no master of MOCVD equipment talent, not to mention the enterprise." China Electronic Technology Group Corporation thirteenth Research Institute Professor Zhang Wansheng said in an interview with Chinese intellectual property news, China's LED technology and compared with abroad, indeed there is a big gap, first is the scarcity of talent; in addition, the equipment is, Japan has first-class equipment, equipment for manufacturing epitaxial wafer do its own equipment, technology development, so they quickly LED however, China needs to introduce foreign equipment.

Nanchang Xin Lei sales management center official told reporters on the chip, the country has not yet conquered high-power chip technology. Although Nanchang Xin Lei has the ability to independently develop a number of mid-range technology, but many other companies in the same industry to introduce Taiwan technology. In the LED downstream packaging and product applications, as well as the light emitting diode mild and temperature control, there is still a big gap with the technology in Taiwan.

"11th Five-Year" how to plan the goal of LED semiconductor lighting is to do ordinary lighting, the current technology and level of LED in China is not enough to replace the ordinary lighting, it is necessary to solve some problems. First of all, to do ordinary lighting, to reach 200lm / W luminous efficiency (lumens per watt), can reach more than 50% fluorescent lamps than incandescent lamp energy saving, saving more than 80%, but the current technical level of China's enterprises are still unable to achieve 100lm / W.

According to the data show that most of our domestic enterprises to do the product is 20lm / w to 30lm / W, belonging to the low-end products. "First of all, do the material. Zhang Wansheng said. Peking University wide gap semiconductor joint center Professor Zhang Guoyi also pointed out that it is now said that any technical route is the best, the final is too early. These technical routes also need time to test. But to seize the key points, the first is the preparation of materials, depending on the efficiency of light, that is, the internal quantum efficiency, the internal conversion of electricity into light. The second is out of the light efficiency, lighting requirements of high power, and power, heat dissipation, material life, performance will change, so it is necessary to send out the heat. How to break through these aspects of technology, how to do, there are many routes to choose from. Although the technical route is still controversial, but the consensus is that China will certainly be a lighting power. But to become a powerful lighting, but also the efforts of all aspects. The implementation of the 11th Five-Year plan is crucial. In this regard, Zhang Wansheng believes that the Ministry of science and technology should increase investment in research, and adjust the direction of investment, such as the formation of the Taiwan Institute of industrial technology, the Central Institute of Korea incubator. After the results of scientific research, and then transferred to the enterprise, but also immature technology on the industrialization. Zhang Guoyi also pointed out that the development of this technology is the need for financial support, but also continued support.