Patent ID: 9627431
Date: 2017-04-18
CPC Classifications: H01L

Claim:
1. A solid-state imaging device comprising: a semiconductor substrate; a plurality of pixels that is disposed in a matrix above the semiconductor substrate; a pixel electrode that is disposed in each of the pixels and electrically isolated from an adjacent one of the pixels; a photoelectric conversion film that is disposed above the pixel electrode and performs photoelectric conversion of light into a signal charge; a charge storage region that is disposed in each of the pixels, is electrically connected to the pixel electrode, and stores the signal charge obtained through the photoelectric conversion in the photoelectric conversion film; an amplification transistor that is disposed in each of the pixels and amplifies the signal charge stored in the charge storage region in a corresponding one of the pixels; a first contact plug that comprises a semiconductor material having semiconducting properties; a line that is disposed above the first contact plug and the charge storage region and comprises a semiconductor material having semiconducting properties; and an element isolation region that is adjacent to the charge storage region, wherein the first contact plug and the charge storage region are electrically connected, the first contact plug and a gate electrode of the amplification transistor are electrically connected via the line, the line is disposed so as to cover at least a portion of the charge storage region in a plan view of the solid-state imaging device, the charge storage region includes an impurity diffusion layer in direct contact with the first contact plug, a concentration of impurities determining a conductivity type of the impurity diffusion layer is higher than a concentration of impurities determining a conductivity type of a region, other than the impurity diffusion layer, included in the charge storage region, and the line is disposed so as to cover a portion of the element isolation region in the plan view of the solid-state imaging device.