Patent ID: 7994048

Claim:
A method of manufacturing a through electrode, comprising: forming a hole on one surface of a silicon substrate; forming an insulating film that covers said surface and an inner wall of said hole; forming a conductive film so as to fill said hole; performing polishing or etching back on said conductive film so as to remove a portion of said conductive film formed outside said hole for exposing said insulating film, and to retreat a surface of said conductive film into an inner level of said silicon substrate than the surface thereof, for forming a conductive plug and a recessed portion; growing a metal film on a retreated surface of said conductive plug thus to fill said recessed portion and to further form a bump having a larger diameter outside said hole than that of a portion of said bump located inside said hole; and polishing another surface of said silicon substrate for exposing said conductive plug, thus to form a through electrode, wherein said forming said bump includes forming a barrier metal film on the surface of said conductive plug and a side wall of said recessed portion, and growing said metal film utilizing said barrier metal film as a base.