On August 3, it was learned from Xuzhou Economic and Technological Development Zone that a new technology of “large-size graphic sapphire substrate†LED materials will be industrialized through the project of science and technology achievements transformation project of the Provincial Science and Technology Department. This achievement will break the monopoly of foreign technology and is of great significance to the development of China's LED industry.
Wei Mingde, general manager of Xuzhou Tongxin Optoelectronics Technology Co., Ltd. introduced that in the past, the materials used in the domestic LED industry were mainly two-inch circular material sheets, and they recently broke through to 6 inches on the basis of mass production of 4-inch materials. The reporter saw that this graphic sapphire substrate product is like a "stone piece", although its thickness is only 0.4 mm, its hardness is second only to diamond. In order to improve the light efficiency, the researchers "dig" a "hill" about 1 micron high on these "stone tablets", which is only 1% of the hair diameter. "The bumps can be adjusted to hundreds of millions of designs and technical processes. These bumps can also be designed into pyramidal, platform-shaped, semi-circular and other different shapes according to the needs of light."
"The larger the size, the more difficult it is to control the protrusion evenly, but the effect is also obvious." Wei Mingde said that the large-size material, the marginal loss of each piece is reduced, can reduce the LED manufacturing cost, improve the luminous efficiency, a 6-inch Materials can now be sold for thousands of dollars. After the project is implemented, it will have an annual production capacity of about 3 million pieces of 4 inches and 4 inches or more, and the annual sales income will exceed 500 million yuan.
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