Patent ID: 7777168
Filing Date: 2010-08-17
Classification: H01L

Abstract:
1. A pixel comprising: a semiconductor substrate of a first doping type; a first layer of the second doping type covering the substrate; a second layer of the first doping type covering the first layer; a MOS-type transistor formed in the second layer and having a drain area and a source area of the second doping type, and a first area of the second doping type, more heavily doped than the first layer, crossing the second layer and extending into the first layer, and connected to the drain area; a second area of the first doping type, more heavily doped than the second layer and bordering the source area; a portion of an insulating material placed in the second layer and surrounding the transistor, said first area extending under the portion of insulating material; and wherein the second area extends from the portion of insulating material to a channel area of the transistor.