Patent ID: 9099536
Filing Date: 2015-08-04
Classification: H01L

Abstract:
1. A method of producing a semiconductor device comprising the steps of: preparing a semiconductor substrate having a first main surface and a second main surface opposite to the first main surface, said semiconductor substrate including a first conductive layer formed on the second main surface; forming a through hole in the semiconductor substrate so that the through hole penetrates through the semiconductor substrate from the first main surface to the second main surface, said first conductive layer being exposed at a bottom portion of the through hole; forming a seed layer in the through hole and on the first main surface so that the seed layer is disposed on a side surface of the through hole from the bottom portion of the through hole to the first main surface; forming a second conductive layer in the through hole so that the second conductive layer is disposed on the seed layer formed in the through hole and on the first main surface through a first plating process; forming a resist on the second conductive layer; performing a developing process to form an opening portion in the resist so that the second conductive layer in the through hole and on the first main surface is continuously exposed in the opening portion; and forming a third conductive layer on the second conductive layer formed in the through hole and on the first main surface according to the resist with the opening portion formed therein.