Patent ID: 7041435
Filing Date: 2006-05-09
Classification: G02B,H01S

Abstract:
1. A method for manufacturing a grating, comprising steps of: a) providing a substrate; b) forming a first insulating layer on said substrate; c) forming a silicon oxide layer on said first insulating layer; d) forming and hard baking under a temperature of 70° C. to 90° C. for 2 to 5 hours a photoresist on said silicon oxide layer for defining a plurality of specific zones; e) etching said first insulating layer and said silicon oxide layer within said specific zones respectively for forming a plurality of concaves; f) forming a second insulating layer on said silicon oxide layer, wherein said second insulating layer fills said concaves for forming a plurality of structural pillars therein; g) defining a plurality of grating zones onto said second insulating layer; h) forming an adhesive layer and a conductive layer on said grating zones in sequence, wherein said grating zones comprise said structural pillars; i) removing parts of said second insulating layer located outside of said grating zones; and j) removing said silicon oxide layer for exposing a plurality of grating structures within said grating zones.