Patent ID: 8038738

Claim:
A solid electrolytic capacitor manufacturing method comprising the steps of: forming a roughened surface layer at a surface of a metal member made of a valve metal and having a proximal portion, a distal portion, and an intermediate portion between said proximal portion and said distal portion; forming a valve metal oxide film at a surface of said roughened surface layer; removing said roughened surface layer from said distal portion of said metal member and from part of said intermediate portion adjacent to said distal portion; forming a resist on said distal portion and said intermediate portion of said metal member; forming a conductive polymer layer of a conductive polymer on said proximal portion of said metal member; and removing said resist and a surface layer portion of said metal member from said distal portion of said metal member; whereby forming an anode formed by said proximal portion of said metal member, a cathode formed by said conductive polymer layer and facing said anode, a dielectric layer formed by said valve metal oxide film and interposed between said anode and said cathode, and an anode lead formed by said distal portion of said metal member.