Patent ID: 11955502
Assignee: SONY SEMICONDUCTOR SOLUTIONS CORPORATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A solid-state image sensor, comprising:
a first substrate that includes a photoelectric conversion unit, a transfer gate unit that is connected to the photoelectric conversion unit, a floating diffusion unit that is connected to the transfer gate unit, and an insulating film that covers the photoelectric conversion unit, the transfer gate unit, and the floating diffusion unit; and
a second substrate that includes a first transistor which is adjacent to the insulating film, the first transistor constituting a part of a circuit connected to the floating diffusion unit via the insulating film and including a back gate, wherein
the first transistor includes a front gate connected to the back gate,
the back gate includes a back gate electrode and a back gate insulating film,
the front gate includes a front gate electrode and a front gate insulating film, and
the back gate insulating film and the front gate insulating film have different film types or different film structures.