Patent ID: 6348360
Filing Date: 2002-02-19
Classification: H01S

Abstract:
A method for producing a semiconductor laser module comprising:a substrate preparation step for preparing a substrate including an active layer between cladding layers; a supporting groove portion formation step for forming a supporting groove portion to support an optical fiber on said substrate; and an electrode formation step for forming an electrode on a substrate surface of a portion of said substrate which is adjacent said supporting groove portion; wherein said cladding layers comprise a first layer and a second layer including an etching blocking layer, and said active layer is laminated between said first layer and said second layer; and wherein said supporting groove portion formation step comprises a first coating formation step for forming first coating regions by coating a first nonconductive member onto substrate surface areas corresponding to side wall portions of said supporting groove portion, and onto an adjacent substrate surface portion that adjoins an end of said supporting groove portion; a first etching treatment step for etching regions other than said first coating regions, from said substrate surface through said second layer to said etching blocking layer; an insulating layer formation step for forming an insulating layer in regions etched in said first etching treatment step; a second coating formation step for forming a second coating region by coating a second nonconductive member onto said adjacent substrate surface portion and onto regions of said insulating layer other than said supporting groove portion; and a second etching treatment step for etching regions other than said second coating region and said side wall portions down to a depth of said first layer to penetrate said active layer.