Patent ID: 7167617
Filing Date: 2007-01-23
Classification: G02B

Abstract:
1. A method for fabricating a master of an optical coupling device, comprising the steps of: fabricating a structure having a convex portion protruded at the middle portion thereof by etching both sides of a substrate by a predetermined depth and concave portions at both sides of said convex portion; applying a photoresist film on said structure and removing said photoresist film by a predetermined thickness so as to form a step in the surface thereof; exposing and developing said photoresist film so that a photoresist film pattern for forming the waveguide is formed in said convex portion of the substrate and a phtoresist film pattern for forming the optical fiber fixing projection is formed in the concave portion of the substrate; filling polymer in grooves between said photoresist film patterns for forming the waveguide; immersing said substrate in a plating bath to plate the concave portion with a metal, until the surface of the photoresist film pattern of said convex portion; removing the polymer filled in the grooves between said photoresist film patterns for forming the waveguide; immersing said substrate in the plating bath again to plate the photoresist film pattern of the convex portion and the plated metal on the concave portion with a metal by a predetermined thickness; and removing said substrate.