manufacturer, CRYSCORE can provide standard or wafers with any orientation applied to epitaxy, as well as sapphire windows with any specifications applied to optics. Patterned sapphire substrates and sapphire ingots also can be provided. Expert in sapphire optics manufacturing.
LED remains the dominant sapphire application. LED sapphire substrateThe Development of Wafers in the Led Industry
allows manufactures to incorporate more LED chips along the outside edge, increasing the brightness of the LEDs. The use of patterned sapphire substrate (PSS) can further increase brightness due to the reduction in density of the GaN layer and enhancement of light extraction efficiency. With the penetration rate for LED-based general lighting continuing to rise, large-sized PSS will become necessary to meet the demands of the rapidly growing lighting market.
sapphire substrate for LEDLED (Light Emitting Diode) has been widely regarded as the main lighting tool of the next generation. Compared with the incandescent lamps currently used, LEDs have the advantages of long life, energy-saving, and safety. The preparation of blue LEDs needs to rely on GaN films. There are many substrate materials used for growing GaN films, such as sapphire and SiC are the most commonly used.
Moreover, a single-crystal sapphire substrate has better light transmission in the visible range. In addition, there is more research regarding GaN film on sapphire, the production technology of GaN on sapphire is relatively mature and the price is relatively cheap, so single-crystal sapphire has become the key substrate material for making white, blue, green, and blue-green GaN substrates.
1. The degree of structural matching between the substrate and the epitaxial film: the crystal structure of the epitaxial material and the substrate material are the same or similar, the lattice constant mismatch is small, the crystallization performance is good, and the defect density is low.
4. Difficulty and cost of material preparation: Considering the needs of industrialization development, the preparation of substrate materials requires conciseness, the cost should not be high, and the substrate size is generally not less than 2 inches.
