Patent ID: 6921714

Claim:
A method of manufacturing a semiconductor device, the method comprising the steps of: (a) forming an insulating film on a semiconductor substrate; (b) simultaneously forming a first conductive pad and a first wiring layer on the insulating film; (c) forming a first interlayer insulating film on the first conductive pad, the first wiring layer and the insulating film; (d) forming a plurality of first through holes in the first interlayer insulating film, each of the first through holes extending from the first conductive pad or the first wiring layer respectively, to an upper surface of the first interlayer insulating film; (e) filling the plurality of first though holes with conductive material; (f) simultaneously forming a second conductive pad and a second wiring layer on the first interlayer insulating film, each of the second conductive pad and the second wiring layer being in contact with the conductive material in one or more of the plurality of first through holes; (g) forming a second interlayer insulating film on the second conductive pad, the second wiring layer and the first interlayer insulating film; (h) forming a plurality of second through holes in the second interlayer insulating film, each of the second through holes extending from the second conductive pad or the second wiring layer, respectively, to an upper surface of the second interlayer insulating film; (i) filling the plurality of second through holes formed in the second interlayer insulating film with conductive material; (j) simultaneously forming a third conductive pad and a third wring layer on the second interlayer insulating film, each of the third conductive pad and wiring layer being in contact with the conductive material in one or more of the second through holes formed in the second interlayer insulating film; (k) forming a third interlayer insulating film on the third conductive pad, the third wiring layer and the second interlayer insulating film; (l-1) forming through the third interlayer insulating film, a third through hole above the third wiring layer and a through aperture above the third conductive pad which is substantially wider than said third through hole; (l-2) simultaneously filling said third through hole with a conductive material and leaving a conductive material covering a side wall of the through aperture so that part of the third conductive pad is exposed; and (m) simultaneously forming an uppermost wiring layer in contact with the conductive material in said third through hole and a bonding pad on the third conductive pad in the through aperture, in the third interlayer insulating film.