Patent ID: 9538112
Date: 2017-01-03
CPC Classifications: H04N

Claim:
1. A solid-state image sensor comprising: a photoelectric converter; a charge-voltage converter; a transfer transistor configured to transfer a charge generated in the photoelectric converter to the charge-voltage converter, wherein a potential of the charge-voltage converter changes to a first direction by a transferred charge; an amplifier transistor configured to output a signal corresponding to the potential of the charge-voltage converter to a column signal line, the amplifier transistor being configured to sequentially output, to the column signal line, a noise level before the transfer transistor transfers the charge to the charge-voltage converter and a light signal level after the transfer transistor transfers the charge to the charge-voltage converter; a capacitance between a control signal line and the charge-voltage converter; and a control unit configured to change a potential of the control signal line so that the potential of the charge-voltage converter changes to a second direction which is opposite to the first direction in a period in which the charge-voltage converter is in a floating state and which is prior to outputting the noise level to the column signal line, wherein the charge-voltage converter includes a semiconductor region, the capacitance includes a capacitance component between the semiconductor region and an electrode electrically connected to the control signal line, at least a part of the charge-voltage converter is formed in a semiconductor substrate, the electrode is arranged on an insulating layer on the semiconductor substrate, a second semiconductor region having the same conductivity type as that of the semiconductor region is included in the semiconductor substrate, and the electrode is arranged on the insulating layer on a region between the semiconductor region and the second semiconductor region.