Patent ID: 8009217

Claim:
A MOS type solid-state imaging device including a pixel region having pixels arranged on a matrix, and a peripheral circuit driving the pixels and obtaining output signals, wherein the pixel region comprises: at least one photodiode; a readout transistor for reading a charge accumulated in the photodiode; a floating diffusion composed of an impurity diffusion layer, for converting the read charge into a voltage; a reset transistor for resetting the converted voltage at the floating diffusion to a predetermined voltage; and an amplification transistor for receiving a potential of the floating diffusion as a gate input, a first gate insulation film used for the readout transistor in the pixel is thicker than a second gate insulation film used for the amplification transistor in the pixel, and the second gate insulation film used for the amplification transistor is thicker than a third gate insulation film used for at least one of transistors in the peripheral circuit.