Patent ID: 8415190
Filing Date: 2013-04-09
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device, comprising: forming a second semiconductor layer of a second conductivity type on a first semiconductor layer of a first conductivity type, the first and second semiconductor layers defining a pn junction of a photodiode device; forming element-separating regions at least in the second semiconductor layer, the element-separating regions dividing the photodiode device into four photodiode region quadrants; forming a conductive layer over the second semiconductor layer; forming a first insulating layer over the conductive layer; forming a mask layer having regions superposed with the conductive layer over the first insulating layer; forming a second insulating layer over the mask layer; performing a first etch to form an opening in the first insulating layer, exposing the conductive layer and the mask layer; performing a second etch to remove portions of the conductive layer exposed in the opening.