Patent ID: 6930299

Claim:
A semiconductor device comprising: a plurality of pixels disposed over a semiconductor substrate in a matrix shape; wherein: each of the pixels comprises a photodiode, a reset transistor, a source follower transistor and a select transistor; the photodiode comprises an impurity diffusion region of a first conductivity type and an impurity diffusion region of a second conductivity type stacked in a thickness direction; each of the reset transistor, the source follower transistor and the select transistor comprises a pair of impurity diffusion regions of the first conductivity type formed in a surface layer of the semiconductor substrate and having a channel region between the impurity diffusion regions and a gate electrode formed over the channel region; the photodiode, the reset transistor, the source follower transistor and the select transistor are disposed in one active region; the active region comprises a first area in which the photodiode is disposed and a second area having a first end continuous with the first area and including an area elongated along a first direction; and each of gate electrodes of the reset transistor, the source follower transistor and the select transistor crosses the area, elongated along the first direction, of the second area, and a cross area between the gate electrode of the reset transistor and the area, a cross area between the gate electrode of the source follower transistor and the area and a cross area between the gate electrode of the select transistor and the area, are disposed in this order in a direction of departing from the first end, an intra-pixel wiring line for interconnecting the impurity diffusion region of the reset transistor on the first end side and the gate electrode of the source follower transistor of the pixel; a reset voltage supply line connected to the impurity diffusion region between the gate electrodes of the reset transistor and the source follower transistor and being applied with a reset voltage for applying an initial reverse bias to the photodiode; a reset signal line for applying a reset signal to the gate electrode of the reset transistor; a select signal line disposed for each row of the pixels, the select signal line applying a select signal to the gate electrodes of the select transistors of the pixels in a corresponding row; and a signal read line disposed for each column of the pixels and connected to the impurity diffusion regions, on a side opposite to the first end, of the select transistors of the pixels in a corresponding column.