Patent ID: 11937002
Assignee: SONY SEMICONDUCTOR SOLUTIONS CORPORATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 15:
16. A solid-state imaging device, comprising:
a first pixel separation region that separates a plurality of unit pixels, wherein each unit pixel of the plurality of unit pixels includes at least two subpixels;
a second pixel separation region that separates each unit pixel of the plurality of unit pixels into the at least two subpixels;
an overflow region configured to control a plurality of signal charges in each subpixel of the at least two subpixels to overflow to at least one adjacent subpixel of the at least two subpixels, wherein the overflow region is between a first subpixel of the at least two subpixels and a second subpixel of the at least two subpixels;
a transistor in a first region of the solid-state imaging device, wherein the transistor is configured to control the overflow;
a P-type region in a depth direction inside the first pixel separation region; and
an N-type region that includes a second region, wherein
the plurality of signal charges is accumulated in the N-type region,
an impurity concentration in the N-type region is highest in the second region of the N-type region,
the overflow region is between a first inner side of the first pixel separation region and a second inner side of the first pixel separation region,
the first inner side is opposite to the second inner side in a cross section,
in the cross section, a region of a unit pixel of the plurality of unit pixels not separated by the second pixel separation region is cut along an incident direction of light, and
the overflow region has a depth between the first region that includes the transistor and the second region in which an impurity concentration is highest.