Patent ID: 7745939
Filing Date: 2010-06-29
Classification: H01L

Abstract:
1. A semiconductor device comprising: a semiconductor element, which has a device forming layer and an electrode pad each formed on an upper surface side; a wiring pattern formed on a lower surface side of the semiconductor element; and a through electrode that connects the electrode pad of the semiconductor element and the wiring pattern, wherein the electrode pad has an opening in its center, the semiconductor element has a through hole, which is communicated with the opening of the electrode pad and passes through from the upper surface side of the semiconductor element to the lower surface side of the semiconductor element, wherein the through electrode has a collar-like connection portion connected to the electrode pad over an entire circumference, and a rod-like connection portion formed in the through hole such that one end is coupled integrally to the collar-like connection portion and the other end is extended to the lower surface side of the semiconductor element, and an insulating layer which covers a lower surface of the semiconductor element, covers side walls of the through hole, and extends into the collar-like connection portion, wherein a lower surface of the insulating layer is coplanar with a lower surface of the rod-like connection portion of the through electrode, and wherein the wiring pattern is formed on the lower surface of the insulating layer and the lower surface of the rod-like connection portion of the through electrode, and covers the lower surface of the rod-like connection portion of the through electrode.