Patent ID: 8102049

Claim:
A semiconductor device, comprising: at least one of an insulating layer and a semiconductor layer each including a hole formed therein; and a through electrode provided in the hole, wherein a side wall of the hole is constituted of a first region from the opening of the hole to a predetermined position between the opening of the hole and the bottom surface of the hole, and a second region which extends from the predetermined position to the bottom surface of the hole, and wherein the through electrode includes: a seed layer that covers a whole surface of the second region and the bottom surface of the hole without covering the first region; and a plating layer which covers the seed layer and at least a part of the first region, wherein the seed layer comprises a first portion and second portion, the first portion covering the bottom surface of the hole, the second portion covering the whole surface of the second region so as to extend along the side wall of the hole, and wherein the predetermined position is placed on a level that is higher than a surface of the first portion of the seed layer.