The sapphire substrate project received 50 million financial subsidies from the state

Abstract Sanan Optoelectronics announced on the evening of July 1st that according to the goal of Anxi County Government to accelerate the cultivation of high-tech emerging industrial clusters, promote the development of LED photoelectric industry chain in Anxi County, and plan to allocate “technical three” finance to the company's sapphire substrate project. Subsidy funds of 50 million yuan...
Sanan Optoelectronics announced on the evening of July 1st that according to the goal of the Anxi County government to accelerate the cultivation of high-tech emerging industrial clusters, promote the development of LED photoelectric industry chain in Anxi County, and plan to allocate “technical three” financial subsidies to the company's sapphire substrate project. The capital is 50 million yuan. The money has been received so far.

The choice of substrate materials is a primary consideration for the fabrication of LED chips. Which suitable substrate should be used depends on the requirements of the device and the LED device. There are generally three materials available on the market as substrates: sapphire (Al2O3), silicon (Si), silicon carbide (Sic).

Typically, epitaxial layers of GaN-based materials and devices are primarily grown on sapphire substrates. Sapphire substrates have many advantages: First, the production technology of sapphire substrate is mature and the device quality is good. Secondly, sapphire has good stability and can be used in high temperature growth process. Finally, sapphire has high mechanical strength and is easy to handle. And cleaning. Therefore, most processes generally use sapphire as the substrate. The hardness of sapphire is very high. Its hardness is second only to diamond in natural materials, but it needs to be thinned and cut (from 400μm to about 100μm) in the manufacturing process of LED devices.

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