Patent ID: 7169629

Claim:
A fabrication method of VCSEL, implemented to form a contact electrode on a substrate in a resonance cavity, comprising: subsequently forming a bottom Bragg reflector, a resonance cavity and a top Bragg reflector, wherein the resonance cavity includes a bottom doped layer and a top doped layer, wherein the bottom doped layer has a carrier electrical property opposite to that of the top doped layer; etching the Bragg reflector, wherein the distance between the etching stop and the top doped layer is smaller than a dopant diffusion depth of a subsequently formed top high-carrier-concentration ohmic contact channel; diffusing dopants into an upper electrode predetermined region to form a top high-carrier-concentration ohmic contact channel connecting the top doped layer, wherein the dopant electrical property of the top high-carrier-concentration ohmic contact channel is opposite to that of the bottom doped layer; forming the upper electrode at the predetermined region, wherein the top high-carrier-concentration ohmic contact channel connects to the top doped layer via the upper electrode; and forming a bottom high-carrier-concentration ohmic contact channel, via which the lower electrode is connected to the bottom doped layer.