Method for producing mixed crystal wafer using special temperatu

Metal treatment – Process of modifying or maintaining internal physical... – Chemical-heat removing or burning of metal

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148 15, 148171, 357 16, 357 17, H01L 2120, H01L 21324

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active

043782590

ABSTRACT:
A method of manufacturing a mixed crystal compound semiconductor wafer suitable for the production of LED having a high light output. Upon a monocrystalline substrate of III-V semiconductor material a base layer is epitaxially grown of the same material as the substrate. An initial gradient layer is grown on the base layer having a mixed crystal ratio varying continuously from that of the base layer to a first value at a constant temperature. A combination sublayer is grown on the initial gradient sublayer which includes at least one constant sublayer having a constant crystal mixture ratio and at least one gradient sublayer having a crystal mixture ratio varying continuously between the mixed crystal ratios of its adjacent constant layers.

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