Image sensor and electronic camera

An image sensor comprising:

• a photoelectric converter that photoelectrically converts light to generate an electric charge;
• a floating diffusion that accumulates the electric charge generated by the photoelectric converter;
• transfer circuitry that transfers the electric charge generated by the photoelectric converter to the floating diffusion;
• transfer signal supply circuitry that is provided in a first diffusion layer and supplies a transfer signal for the transfer circuitry to transfer the electric charge to the floating diffusion;
• reset circuitry that resets the electric charge accumulated in the floating diffusion;
• reset signal supply circuitry that is provided in a second diffusion layer and supplies a signal for the reset circuitry to reset the electric charge accumulated in the floating diffusion, the second diffusion layer having a polarity different from a polarity of the first diffusion layer;
• a first semiconductor substrate provided with the photoelectric converter, the transfer circuitry, and the reset circuitry;
• and
• a second semiconductor substrate provided with the reset signal supply circuitry and the transfer signal supply circuitry.

An image sensor comprising:

• a first semiconductor substrate provided with a plurality of pixels, including a photoelectric converter that photoelectrically converts light to generate an electric charge, a floating diffusion that accumulates the electric charge generated by the photoelectric converter, and transfer circuitry that transfers the electric charge generated by the photoelectric converter to the floating diffusion, a first substrate voltage being applied to the first semiconductor substrate;
• and
• a second semiconductor substrate provided with supply circuitry for each of the pixels, the supply circuitry supplying the transfer circuitry with a signal for the transfer circuitry to transfer the electric charge, and a second substrate voltage different from the first substrate voltage being applied to the second semiconductor substrate, wherein
• the transfer circuitry electrically connects the photoelectric converter and the floating diffusion if a first voltage higher than the first substrate voltage is supplied as the signal, and electrically disconnects the photoelectric converter and the floating diffusion if a second voltage lower than the first substrate voltage is supplied as the signal, and
• one of the first voltage and the second voltage is the second substrate voltage.