Patent ID: 6222974
Filing Date: 2001-04-24
Classification: G02B

Abstract:
A method of manufacturing an optical waveguide comprising:a step of depositing a mask layer on a surface of a crystalline silicon substrate, thereafter removing a part of said mask layer;a step of forming a first porous silicon region in said crystalline silicon substrate, starting from a part from which said mask layer is removed;a step of forming a second porous silicon region having smaller pores than pores of the first porous silicon region, in outside part of the first porous silicon region;a step of a first doping of impurity elements into said first porous silicon region and/or said second porous silicon region;a step of applying electromagnetic wave intensity of which periodically changes, into a part of said first porous silicon region and/or said second porous silicon region;a step of a second doping of impurity elements into said first porous silicon region and/or said second porous silicon region; and,a step of oxidizing said first porous silicon region and said second porous silicon region.