Patent ID: 8043519
Filing Date: 2011-10-25
Classification: B01D,C01B,C23F,C25D,H01M,Y02E,Y10T

Abstract:
1. A production method of a hydrogen production filter using a thin film support substrate, comprising a disposing step of disposing an insulating film on a surface of the thin film support substrate which is on an opposite side relative to a surface where columnar convex portions are formed, said thin film support substrate comprising a metal substrate, the plurality of columnar convex portions formed on one surface of said metal substrate, and a plurality of through holes formed at a portion where said columnar convex portions are not formed, so as to pierce said metal substrate, wherein an area of the columnar convex portion non-formed portion occupying on the columnar convex portion formed side is within the range of 20 to 90%, a copper plating step of forming a copper plating layer on the surface of said thin film support substrate where the columnar convex portions are formed, so as to fill up the inside of said through holes and cover said columnar convex portions, a flattening step of flat-removing said copper plating layer so as to expose top surfaces of said columnar convex portions and form the same flat surface with said top surfaces, a film forming step of forming a Pd alloy film by plating on the flat surface formed by the top surfaces of said columnar convex portions and said copper plating layer, and a removal step of removing the copper plating layer by selective etching after removal of said insulating film.