Patent ID: 8247306

Claim:
A method of manufacturing a solid-state image pickup device, comprising: forming a first hole in which an alignment mark is to be formed, and a second hole in which a contact portion for a pad is to be formed; filling a conductive material in each of said first hole and said second hole with an insulating material between the conductive material and the silicon substrate, thereby forming said alignment mark and said contact portion in said first hole and said second hole, respectively; forming a light converting portion, in a pixel portion, for photoelectrically converting an incident light to output signal charges corresponding to the incident light, a transistor, in said pixel portion, for reading out the signal charges from said light receiving portion and outputting a signal corresponding to the signal charges, and a transistor, in a peripheral circuit portion, for processing the signal output from said pixel portion in said silicon substrate; forming a first insulating film on said first surface of the silicon substrate, and forming a connection electrode so as to be connected to said contact portion on said first insulating film; forming a wiring layer so as to include a first electrode, in a pad portion, connected to said connection electrode on said first insulating film; removing a second surface side opposite to the first surface side of said silicon substrate until said contact portion is exposed, and forming a second insulating film on an exposed surface of the remaining silicon substrate; and forming a second electrode, in said pad portion, so as to be connected to said conductive layer in said second insulating film on the second surface side of said silicon substrate.