Patent ID: 7696546
Filing Date: 2010-04-13
Classification: H01L

Abstract:
1. A solid-state imaging device in which a plurality of image pixels are disposed in a direction along a main surface of a semiconductor substrate, each of the plurality of image pixels including: a signal charge accumulator operable to accumulate a signal charge generated by a photoelectric conversion; a transmission transistor disposed adjacent to the signal charge accumulator; and a reset transistor, a source of which is connected to a drain of the transmission transistor, wherein one of (a) the drain of the transmission transistor and (b) a point on a signal path connecting the drain of the transmission transistor and the source of the reset transistor functions as a signal outputter, a gate of the transmission transistor is in contact with a first compound layer composed of metal and a semiconductor, and a gate of the reset transistor is in contact with a second compound layer composed of metal and a semiconductor, gates of transmission transistors of at least two of the image pixels are electrically connected with each other by a first interconnect which is unified with the gates of transmission transistors and in contact with the first compound layer in the direction along the main surface, and gates of reset transistors of the at least two of the image pixels are electrically connected with each other by a second interconnect which is unified with the gates of reset transistors and in contact with the second compound layer in the direction along the main surface, and the signal outputter (i) is out of contact with the first compound layer, the second compound layer, and any other compound layer composed of metal and a semiconductor, (ii) has a top surface that is covered with an insulating layer, and (iii) is electrically connected with a metal wiring layer so as to be connected with other transistors, the metal wiring layer being disposed on the insulating layer.