Patent ID: 7026185

Claim:
A method of fabricating an image sensor, comprising: forming an isolation layer in a semiconductor substrate to define a first active region, a second active region that extends from the first active region and a third active region that extends from the first active region; forming a well region of a second conductivity type in the first active region; forming a region of a first conductivity type in the well region, at a surface of the first active region; forming a transfer transistor, a reset transistor, a sensing transistor and a pull-up transistor serially connected to the well region in the second active region, the transfer transistor being adjacent to the first active region, the transfer transistor, the reset transistor, the sensing transistor and the pull-up transistor including a transfer gate electrode, a reset gate electrode, a sensing gate electrode and a pull-up gate electrode that cross over the second active region respectively; forming an interlayer insulation layer on the substrate having the transistors; patterning the interlayer insulation layer to form contact holes that expose the sensing gate electrode as well as the second active region between the transfer gate electrode and the reset gate electrode; and forming a first local interconnection on the interlayer insulation layer, the first local interconnection electrically interconnecting the sensing gate electrode with the second active region between the transfer gate electrode and the reset gate electrode through the contact holes.