Patent ID: 7319045
Filing Date: 2008-01-15
Classification: H01L

Abstract:
1. A GaN-based LED fabrication method, comprising the steps of: providing a substrate; forming a plurality of GaN-based epitaxial layers on top of said substrate, said plurality of epitaxial layers comprising a low-temperature buffer layer, a high-temperature buffer layer, an n-type ohmic contact layer, an active layer, and a cladding layer, sequentially from bottom to top in this order; forming a p-type ohmic contact layer on top of said cladding layer, said p-type ohmic contact layer having a texturing surface; removing a part of said p-type ohmic contact layer, said cladding layer, said active layer, and said n-type ohmic contact layer with a dry etching process to expose an area of said n-type ohmic contact layer; and forming a p-type transparent metallic conductive layer on top of said texturing surface of said p-type ohmic contact layer with an evaporation process.