Patent ID: 6165811
Filing Date: 2000-12-26
Classification: H01S

Abstract:
A method of fabricating a semiconductor laser comprising the steps of:sequentially depositing a lower cladding layer, an active layer, a first upper cladding layer, an etching stop layer, a second upper cladding layer and an ohmic contact layer over a compound semiconductor substrate;forming an etching mask over said ohmic contact layer so as to expose channel regions and to shield the ridge regions between said channel regions;performing wet etching to etch said ohmic contact layer and said second upper cladding layer so as to expose said etching stop layer so as to form the channels and the ridges having narrower widths than the parts of said etching mask shielding said ridge regions; andimplanting dopant ions into the parts of said first upper cladding layer and said active layer below said channels to form ion-implanted regions by using said etching mask as the ion implantation mask.