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LED verticle chip structure with special coarsening morphology and preparation method therefor
LED verticle chip structure with special coarsening morphology and preparation method therefor
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机译:具有特殊粗化形态的led垂直芯片结构及其制备方法
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摘要
A method for improving luminous efficiency of an LED in a vertical structure. First, an LED vertical chip structure with a special coarsening morphology is provided, and micron-scale holes (311) are formed in the surface of an epitaxial structure layer (300) and submicron-scale holes (312) are formed at the bottom of the micron-scale holes. The light emitting surface structure can increase the emission probability of light inside a device, and can greatly improve the light emission efficiency. Also provided is a preparation method for the chip structure. Micron-scale holes (311) are formed in an epitaxial structure layer (300) by stripping a growth substrate (100) with micron-scale bumps, and submicron-scale holes (312) are formed at the bottom of the micron-scale holes (311) by means of etching. The method is simple in process, can be applied to large-scale industrial production, and can greatly improve the luminous efficiency of the LED in the vertical structure.
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