Patent ID: 6291328
Filing Date: 2001-09-18
Classification: H01L

Abstract:
A method of fabricating an opto-electronic device, comprising the steps of:(a) forming an ohmic contact layer on a surface of a semiconductor substrate of a first conductive type;(b) forming a diffusion source layer on the ohmic contact layer;(c) forming a mask on the diffusion source layer;(d) etching the diffusion source layer, using said mask as an etching mask;(e) diffusing impurity atoms from the diffusion source layer into the ohmic contact layer and the semiconductor substrate, thereby forming at least one diffusion area of a second conductive type in the semiconductor substrate;(f) etching the ohmic contact layer, using at least one of the diffusion source layer and said mask as an etching mask, thereby removing all parts of the ohmic contact layer disposed outside said at least one diffusion area; and(g) forming at least one electrode making ohmic contact with the ohmic contact layer.