Patent ID: 8558387

Claim:
A semiconductor device comprising: a semiconductor substrate; a wiring layer formed above said semiconductor substrate; a through-hole electrode extending from a bottom surface of said semiconductor substrate to said wiring layer; a bottom surface wiring provided at the bottom surface of said semiconductor substrate such that said bottom surface wiring is connected to said through-hole electrode; an insulating film covering the bottom surface of said semiconductor substrate and said bottom surface wiring, the insulating film having an opening for a first portion of said bottom surface wiring; and an external terminal being connected to said bottom surface wiring at said first portion of said bottom surface wiring, wherein said first portion of said bottom surface wiring has a greater thickness than both of a thickness of a second portion of said bottom surface wiring, and a thickness of said through-hole electrode, wherein said external terminal extends from said first portion of said bottom surface wiring to a bottommost surface of said insulating film so as to be beneath the bottommost surface, and further wherein said external terminal covers all of said first portion.