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 LED chip technology the key to development lies in the base material and epitaxial growth techniques. Base material by the traditional materials of sapphire, silicon and silicon carbide, the development of zinc o xide, gallium nitride and other materials. In a few short years, by means of a series of technical improvements, including chip architecture, surface roughening treatment and multiple quantum well structure design, including LED light effects achieved a great breakthrough. Reduce the cost of the dimmable led downlights light LED chip to occupy the main part of the cost of LED lights, thereby reducing the cost of the LED is to reduce the cost of the LED chip. LED chip technology the key to development lies in the base material and epitaxial growth techniques. The base material from the traditional materials of sapphire, silicon and silicon carbide, zinc oxide, gallium nitride, and other new materials developed to ..