Patent ID: 6124080
Filing Date: 2000-09-26
Classification: G02B

Abstract:
A method of manufacturing an optical device having a groove, comprising the steps of:forming, on a substrate, a first layer of a first resist material, said first resist material being selected to be resistant to wet etching so that said first layer serves to mask wet groove-sculpting etching;forming, directly on a part of said first layer, a second layer of a second resist material different from the first resist material, said second resist material comprising an upper, exposed surface, and said second resist material being selected to be resistant to dry etching, and said second layer being patterned to define a groove area and shape;carrying out a first etching of said first layer located within said groove area to expose an area of said substrate;carrying out a second etching of said area of said substrate located within said groove area thereby to form a groove for accepting an optical fiber; andsubsequent to said forming a second layer and prior to said first etching step, forming an optical waveguide layer at a plane above said upper, exposed surface,wherein said step of forming a first layer is performed by thermal oxidation.