Patent ID: 6773945
Filing Date: 2004-08-10
Classification: H01S

Abstract:
A method of manufacturing a waveguide optical semiconductor device comprising:forming a lower clad layer on a substrate; forming a core layer on the lower clad layer; forming an upper clad layer on the core layer; forming a contact layer on the upper clad layer; selectively forming a mask layer on the contact layer, said mask layer exposing a pair of line patterns located in parallel and an independent rectangular pattern located near the line patterns; removing the contact layer and a part of the upper clad layer by a dry etching method using the mask layer; removing the upper clad layer by a wet etching method using the mask layer so as to form a mesa stripe channel structure and to expose the core layer; coating an insulating material on the exposed core layer and on the contact layer; removing the insulating material formed on the contact layer of the mesa stripe channel structure; forming an electrode layer on the contact layer of the mesa stripe channel structure; and forming a bonding pad layer extending from the independent rectangular pattern to the electrode layer.