US 12,690,288 B2Granted

Imaging element and imaging device

AssigneeSony Semiconductor Solutions Corporation

InventorsHiroshi Takahashi, Shigehiro Ikehara, Tadashi Iijima

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Abstract

An imaging element according to the present disclosure includes a pixel, an overflow path, a pixel isolation unit, a pixel isolation electrode, an in-pixel isolation unit, and an in-pixel isolation electrode. The pixel includes a plurality of photoelectric conversion units formed in a semiconductor substrate having an interconnect region arranged on a front surface side and performs photoelectric conversion of incident light. The overflow path mutually transfers charges between the plurality of photoelectric conversion units. The pixel isolation unit is at a boundary of the pixel. The pixel isolation electrode is in the pixel isolation unit, and a first bias voltage is applied to the pixel isolation electrode. The in-pixel isolation unit isolates the plurality of photoelectric conversion units from each other. The in-pixel isolation electrode is arranged in the in-pixel isolation unit, and a second bias voltage is applied to the in-pixel isolation electrode.

Claims23

Dependent claims

An imaging element, comprising:

a pixel that includes a plurality of photoelectric conversion units that is formed in a semiconductor substrate having an interconnect region arranged on a front surface side and performs photoelectric conversion of incident light from a subject to generate charges;
an overflow path that mutually transfers charges between the plurality of photoelectric conversion units;
a pixel isolation unit that is arranged at a boundary of the pixel;
a pixel isolation electrode that is arranged in the pixel isolation unit and to which a first bias voltage is applied;
an in-pixel isolation unit that isolates the plurality of photoelectric conversion units from each other;
an in-pixel isolation electrode that is arranged in the in-pixel isolation unit and to which a second bias voltage is applied;
a charge holding unit that holds the generated charges;
a plurality of charge transfer units that are each arranged in a corresponding one of the plurality of photoelectric conversion units and configured to transfer charges generated by the photoelectric conversion units to the charge holding unit to cause the charge holding unit to hold the charges;
and
an image signal generation unit that generates an image signal on a basis of the held charges.

7 more elements

Dependencies are inferred from the claim text.