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Date: 2018-05-22
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LED chip industry development prospect analysis

日期: 2018-05-22
浏览次数: 20

In recent years, the technological development and process improvement of each link in the LED industry chain have drastically reduced the cost of LED and promoted the all-round development of LED applications. LED epitaxial growth and chip manufacturing are the most important steps in the LED production process. The level of technological development determines the penetration range of LED applications. Improving luminous efficiency (lm/W) and reducing unit cost (yuan/lm) is the main goal of LED epitaxial wafer industry technology development.

Luminous efficiency is a symbolic technical indicator of LED products. In addition to affecting the brightness and energy consumption of LED chips, luminous efficiency also affects the cost and reliability of LED chips. In recent years, in order to improve the luminous efficiency, researchers have done a lot of R&D work on improving the quantum efficiency and light extraction efficiency of LEDs, and proposed a PSS substrate epitaxial wafer, a roughened epitaxial surface, a metal bond peeling, and a flip chip structure. , vertical chip structure and other technologies have led to a significant increase in LED luminous efficiency. LED light source device package warm white luminous efficiency has reached 140lm / W or so, the package cool white luminous efficiency has reached 170lm / W or so, the international mainstream laboratory level has reached 230lm / W. In March 2014, a LED with a luminous efficiency of 303 lm/W was released, which further improved the luminous efficiency of LED technology.

In recent years, due to government policy support and R&D capital intensive investment in China, and accompanied by a large number of Chinese Taiwanese and South Korean LED industry technical experts and teams joining local companies, the average technical level of domestic LED epitaxial chip companies has made considerable progress and has achieved International First

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