Patent ID: 7214615

Claim:
A method of manufacturing a semiconductor device having electrodes penetrating a semiconductor substrate, the method comprising the steps of: forming a concave portion extending from an active surface of a semiconductor substrate on which an integrated circuit is formed to an interior of the semiconductor substrate; forming a first insulating layer on an inner surface of the concave portion; filling an inner side of the first insulating layer with an electroconductive material so as to form an electrode; exposing a distal end portion of the first insulating layer by etching a rear surface of the semiconductor substrate; forming a second insulating layer on the rear surface of the substrate; and exposing the distal end portion of the electrode by removing the first insulating layer and the second insulating layer from a distal end portion of the electrode, wherein a cross-sectional area of the distal end portion is made equal to or smaller than a cross-sectional area of the electrode at the active surface of the substrate.