Introduction: LED package refers to the package of the light-emitting chip, which is quite different from the integrated circuit package. LED packaging is not only required to protect the wick, but also to be able to transmit light. Therefore, LED packaging has special requirements for packaging materials. Below I will introduce the technical principle of LED packaging and how the LED packaging is developed in the domestic industry.
The technical principle of LED packaging:
Due to the complicated structure and process, the high-power LED package directly affects the performance and life of the LED, especially the high-power white LED package is a hot spot in research. The functions of the LED package mainly include: 1. mechanical protection to improve reliability; 2. enhanced heat dissipation to reduce chip junction temperature and improve LED performance; 3. optical control, improve light extraction efficiency, optimize beam distribution; 4. power supply management, Includes AC/DC transitions, as well as power control.
The choice of LED packaging methods, materials, structures, and processes is primarily determined by factors such as chip structure, optoelectronic/mechanical characteristics, specific applications, and cost. After more than 40 years of development, LED packaging has experienced the development stages of stent (Lamp LED), SMD (SMD LED), and power LED (Power LED). With the increase of chip power, especially the development of solid-state lighting technology, new and higher requirements are put forward for the optical, thermal, electrical and mechanical structures of LED packages. In order to effectively reduce the thermal resistance of the package and improve the light extraction efficiency, a new technical idea must be adopted for the package design.
How is the development of LED packaging in the domestic industry:
1. Industry output value
After years of development, China's LED packaging industry has matured. In recent years, LED packaging companies have actively listed in the market. With the help of the continuous growth of capital market and downstream application industries, the scale of enterprise expansion has accelerated, the production capacity has increased rapidly, and the scale of domestic LED packaging industry has been expanding. The total output value of domestic LED packaging in 2012 It reached 43.8 billion yuan, an increase of 53.68% compared with 2011. The output value of Guangdong Province reached 32.3 billion yuan, an increase of 57.56%, accounting for 73.74% of the total output value of domestic LED packaging.
The rapid growth of the domestic LED packaging industry's output value is mainly because most international LED packaging manufacturers are optimistic about China's domestic application market, have set up production bases in China, increase domestic industry sales, and domestic companies expand production capacity, investment capacity is released .
2. Status of domestic LED packaging enterprises
At present, there are more than 2,000 LED packaging enterprises above designated size in China, of which 2/3 are distributed in the Pearl River Delta region. There are 8 listed companies in the main business, one in Shandong, and the other 7 listed companies are in Guangdong Province, 5 in Shenzhen, and 1 in Foshan and Guangzhou. At the same time, some large downstream application companies have their own packaging production lines. In addition, most foreign and Taiwanese packaging companies have established production bases in the Mainland, and mainland China has become the world's largest LED packaging production base.
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