Patent ID: 6482665
Filing Date: 2002-11-19
Classification: H01S

Abstract:
A method of manufacturing a polarization surface-emitting laser, comprising:forming a bottom mirror layer and an active layer on top of a semiconductor substrate in succession; forming a first top mirror layer of a structure of an AlAs layer/GaAs layer on top of said active layer; forming a second top mirror layer of a multi-layer structure of a Distributed Bragg Reflector with no doping so that a high electric field may be applied to a top of said first top mirror layer and high reflectance may be obtained; forming a third top mirror layer of a multi-layer structure of a Distributed Bragg Reflector with n-type doping so that an electric field may be efficiently distributed on top of said second top mirror layer; forming a bottom n-type electrode in an etched area of said semiconductor substrate after adding an anti-reflection film on a back surface of said semiconductor substrate and selectively etching a part of said anti-reflection film; forming a photoresist pattern on a top surface of said third top mirror layer; forming a laser column by etching said third top mirror layer, said second mirror layer and a part of said GaAs layer of said first top mirror layer by ion beam etching; forming a protective film of SiNx on said laser; etching said protective film and said first top mirror layer after forming a photoresist pattern so that said laser column may be formed in the center thereof; forming an insulation area by oxidizing a part of an exposed portion of said AlAs layer on a side of said first top mirror layer by wet oxidation; removing a part of said protective film on top of said GaAs layer of said first top mirror layer to form a p-type electrode on said exposed GaAs layer; removing said protective film on top of said laser, thereby exposing said laser column to form a top n-type electrode on top of said exposed laser column; forming an insulation film of one of the group consisting essentially of SiOx and SiNx on top of said laser; and forming an electrode pad for wire bonding after etching said insulation film on top of said n-type electrode of said third top mirror layer and a part of said insulation film on top of said p-type electrode.