Patent ID: 7605455

Claim:
A back-illuminated semiconductor device comprising: a semiconductor substrate, having: a photodetecting unit formed on one surface, a recess formed by etching a region, opposing the photodetecting unit, of another surface, wherein the recess is formed at light incident side of the semiconductor substrate, an outer edge surrounding the recess, and first electrodes disposed on the one surface at the outer edge and electrically connected to the photodetecting unit; a wiring substrate, disposed to oppose the one surface side of the semiconductor substrate and having second electrodes connected via conductive bumps to the first electrodes; and a resin, filling a gap between the wiring substrate and the outer edge with the conductive bumps; wherein the wiring substrate has formed therein a groove portion that surrounds a region opposing the recess and communicating portions that extend from the groove portion to an exposed surface of the wiring substrate, wherein the exposed surface of the wiring substrate is located at an outer side of a region covered by the resin.