Patent ID: 7531375
Filing Date: 2009-05-12
Classification: H01L

Abstract:
1. A method of manufacturing solid state image-pickup devices including a semiconductor substrate having a plurality of light sensors and a plurality of bonding pads located at a first surface side, said method comprising the steps of: bonding a transparent plate to the first surface side of the semiconductor substrate, the first surface side of the substrate including a plurality of solid image-pickup devices; grinding a second surface side of the semiconductor substrate opposite the side having the transparent plate, to reduce the thickness of the semiconductor substrate; forming through holes extending from the second surface side of the semiconductor substrate to lower surfaces of the bonding pads; forming a first insulating film on inner surface of each of the through holes; forming a second insulating film on the back surface of the semiconductor wafer so as to surround at least the openings of the through holes; cutting the semiconductor wafer together with the transparent plate to form a plurality of solid image-pickup devices; and further wherein each of the bonding pads is a contiguous solid structure having no internal voids extending to both sides of the substrate and filling the through holes with electrically conductive material contacting a lower surface of the bonding pads and being exposed from the openings of the through holes at the second side of the substrate.