Patent ID: 9653514
Date: 2017-05-16
CPC Classifications: H01L,H04N

Claim:
1. A solid-state imaging device comprising: a plurality of pixels, wherein each pixel includes: a photoelectric conversion portion that has a second conductive type, is arranged in a surface layer portion of a surface of a semiconductor substrate having a first conductivity type, and converts light incident on the surface into an electric charge; a charge holding portion that has a second conductive type, stores the electric charge generated in the photoelectric conversion portion, and is arranged in the semiconductor substrate; a multiplication gate electrode that is capacitively coupled with the charge holding portion, and is arranged on the semiconductor substrate via an insulation film; and a charge barrier portion that is arranged between the charge holding portion and the insulation film at a position where the multiplication gate electrode and the charge holding portion are capacitively coupled, has a first conductivity type with a higher impurity concentration than the semiconductor substrate, causes the charge holding portion to hold the electric charge until an electric field in a depth direction of the semiconductor substrate reaches an electric field capable of avalanche multiplication when a voltage is applied to the multiplication gate electrode, and generates the avalanche multiplication of the electric charge in the depth direction when a predetermined voltage is applied to the multiplication gate electrode.