Optical waveguide master and method of manufacturing the same

A method of manufacturing an optical waveguide master, the method comprising the steps of:

• (i) forming an optical waveguide manufacturing master having at least one embossed pattern to be a core region, on a substrate;
• (ii) polishing the optical waveguide manufacturing master at predetermined regions at both ends of the embossed pattern to form inclined surfaces;
• (iii) cutting the optical waveguide manufacturing master with the inclined surfaces at both sides of and in parallel with the embossed pattern, and forming a main master having the embossed pattern and the inclined surfaces, and first and second sub masters having only the inclined surfaces without the embossed pattern;
• (iv) mutually facing, overlaying, and fixing inclined surfaces of the first and second sub masters to respective inclined surfaces of the main master, to form an optical waveguide manufacturing master with inclined surfaces;
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• (v) pouring PDMS (Poly-DiMethal-Siloxane) onto the optical waveguide manufacturing master with the inclined surfaces, covering the PDMS with a glass sheet, thermally curing the PDMS, and separating the cured PDMS from the glass sheet and the optical waveguide manufacturing master to complete a PDMS master of an engraved waveguide having the inclined surfaces.