Patent ID: 9620558
Date: 2017-04-11
CPC Classifications: H01L,H04N

Claim:
1. A solid-state image sensor, comprising: a pixel array that includes first pixels, each having a first photoelectric conversion unit and a second photoelectric conversion unit arranged along a first direction, and second pixels, each having a third photoelectric conversion unit and a fourth photoelectric conversion unit arranged along a second direction; a first transfer gate via which a signal charge generated in the first photoelectric conversion unit is transferred to a first charge voltage conversion unit; a second transfer gate via which a signal charge generated in the second photoelectric conversion unit is transferred to a second charge voltage conversion unit; a third transfer gate via which a signal charge generated in the third photoelectric conversion unit is transferred to a third charge voltage conversion unit; and a fourth transfer gate via which a signal charge generated in the fourth photoelectric conversion unit is transferred to a fourth charge voltage conversion unit, wherein: at least one of a gate width, a gate length and an installation position of at least one transfer gate among the first transfer gate, the second transfer gate, the third transfer gate and the fourth transfer gate is altered so as to achieve uniformity in voltage conversion efficiency at the first charge voltage conversion unit, the second charge voltage conversion unit, the third charge voltage conversion unit and the fourth charge voltage conversion unit; and the first transfer gate and the second transfer gate are formed so as to assume a substantially identical gate width or gate length, the third transfer gate and the fourth transfer gate are formed so as to assume a substantially identical gate width or gate length, and installation positions at which the first transfer gate and the second transfer gate are disposed in the first pixels and installation positions at which the third transfer gate and the fourth transfer gate are disposed in the second pixels are substantially identical.