Patent ID: 7863658

Claim:
A complementary metal-oxide semiconductor (CMOS) image sensor, comprising: an active region of a drive transistor, wherein the active region is in the shape of a line; a single gate insulation layer covering a vertical portion of a side of the active region; a gate electrode of the drive transistor, wherein the gate electrode intersects the active region; a blocking layer interposed between the active region and the gate electrode, wherein the blocking layer includes a stacked layer of oxide and nitride formed on a horizontal portion above the active region, wherein the single gate insulation layer is separate and distinct from the oxide in the blocking layer, wherein the single gate insulation layer covers a side of the oxide of the blocking layer, and wherein the single gate insulation layer covers only a portion of a side of the nitride of the blocking layer; and a metal contact electrically connected to the gate electrode, wherein the metal contact is formed above an intersection region of the active region and the gate electrode.