Patent ID: 7582972
Filing Date: 2009-09-01
Classification: H01L

Abstract:
1. A semiconductor device comprising: a semiconductor substrate having a first surface, a second surface opposed to the first surface, and a circuit element on the first surface; an electrode pad disposed on the first surface of the semiconductor substrate, electrically coupled to the circuit element; a first metal layer patterned to cover the electrode pad; a first conductive pattern on the first metal layer; a protective layer that seals the first-surface side of the semiconductor substrate, and that has an opening exposing part of the first conductive pattern; an electrode covering said opening, the electrode being electrically coupled to the exposed part of the first conductive pattern; an interlayer dielectric film disposed between the protective layer and the first surface of the semiconductor substrate, having a through hole extending to the electrode pad; and a conductive nub disposed between the first conductive pattern and the first metal layer below the opening in the protective layer, the first conductive pattern including a first part on the conductive nub and projecting from the opening in the protective layer, a second part in the through hole, and a third part on the interlayer dielectric film to link the first and second parts, the electrode is a bump electrode on the first part of the first conductive pattern.