Patent ID: 9099443
Filing Date: 2015-08-04
Classification: H01L

Abstract:
1. A semiconductor device, comprising: a semiconductor substrate having a first surface opposing a second surface and including a first region, and a second region having a thickness that is less than a thickness of the first region; a first metal film that is provided in each of a first through hole and a second through hole formed between the first surface and the second surface of the semiconductor substrate within the first region and the second region, respectively; a second metal film that is formed on the first metal film and is disposed inside the first through hole and outside of the second through hole; a third metal film that is formed on the second metal film and is disposed outside of the first and second through holes, wherein: a thickness of the second metal film located outside of the second through hole is greater than a thickness of the second metal film located outside of the first through hole, and a difference between a height of an upper surface of the third metal film in the first region and a height of an upper surface of the third metal film in the second region is less than the difference of a thickness of the semiconductor substrate at the first region and a thickness of the semiconductor substrate at the second region.