Patent ID: 7772624
Filing Date: 2010-08-10
Classification: H01L

Abstract:
1. An image sensor device, comprising: a semiconductor substrate; a photo-detector in said semiconductor substrate, said photo-detector comprising a charge generating region therein configured to convert photons received by said photo-detector into charge carriers; and a first transistor having a terminal configured to receive the charge carriers generated by said photo-detector, said first transistor comprising a first gate electrode, a first drain region having highly and lightly doped impurity regions therein and a first source region having highly and lightly doped regions therein; wherein a first distance between an edge of the highly doped region in the first drain region and one edge of the first gate electrode is greater than a second distance between an edge of the highly doped region in the first source region and another edge of the first gate electrode, the one edge of the first gate electrode being adjacent to the edge of the highly doped region in the first drain region and the another edge of the first gate electrode being opposite to the one edge of the first gate electrode.