Patent ID: 6876016

Claim:
A structure for an image sensor comprising: a partially processed semiconductor wafer containing a p-type region; an n-type connection region within said p-type region; an n-type photodiode region within said p-type region connected to said connection region; a field oxide isolation region having a part that is over portions of said n-type connection region and n-type photodiode region covering the area where these regions are connected and extending into these regions, ending within these regions while leaving a distance between the edges of said part of field oxide isolation region and pn junctions formed by the connection region and the p-type region and the n-type photodiode region and p-type region; a gate oxide over regions not covered by field oxide; an extended gate structure extending from above said part of field oxide isolation region to a distance beyond said connection region to accommodate a channel of an n-channel MOSFET and forming the drain region of the n-channel MOSFET, and with the connection region acting as the source; a blanket transparent insulating layer.