Patent ID: 7399420

Claim:
A method of manufacturing a focusing grating coupler using a stamper, comprising the steps of: sequentially forming a clad buffer layer, a core layer, a grating layer, and a polymer layer; disposing a stamper on the polymer layer, the stamper having a negative pattern thereon; forming a grating pattern having an inverse image to a grating pattern of the stamper, by pressing the stamper in the polymer layer; removing the stamper; and forming a focusing grating coupler composed of the grating layer on the core layer, by anisotropically etching the polymer layer and the grating layer, wherein the stamper is fabricated by the steps of: forming a predetermined grating pattern of a metallic thin layer on a substrate; forming a negative pattern having an inverse image to the grating pattern, by etching an exposed part of the substrate with a predetermined depth; completing a metallic pattern master having the negative pattern thereon, by removing the metallic pattern; forming an anti-adhesion layer on a whole surfaces of the embossing master; forming a stamper layer with a predetermined thickness on the anti-adhesion layer so that the negative pattern is completely buried; and completing a stamper by separating the stamper layer from the embossing master, the stamper having a grating pattern of an inverse image to the negative pattern thereon.