Solid-state imaging device and imaging device
AssigneeSony Semiconductor Solutions Corporation
InventorKazuki Nomoto
Life of this patent
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Abstract
Improvement of noise characteristics is achievable. A solid-state imaging device according to an embodiment includes a plurality of photoelectric conversion elements (333) arranged in a two-dimensional grid shape in a matrix direction and each generating a charge corresponding to a received light amount, and a detection unit (400) that detects a photocurrent produced by the charge generated in each of the plurality of photoelectric conversion elements. A chip (201a) on which the photoelectric conversion elements are disposed and a chip (201b) on which at least a part of the detection unit is disposed are different from each other.
Claims21
(canceled)
A light detecting device, comprising:
- a first substrate including a photoelectric conversion element configured to generate a charge corresponding to a received light amount by photoelectric conversion;
- a second substrate including:
- at least a part of a current-voltage converter, the current-voltage converter being configured to convert a current produced by the charge into a voltage corresponding to the current;
- a subtractor coupled to the current-voltage converter and configured to generate a difference signal based on the voltage from the current-voltage converter at different timings;
- and
- a quantizer coupled to the subtractor and configured to quantize the difference signal into a digital signal by comparing the difference signal with a threshold voltage;
- and
- a third substrate including an amplification circuit coupled to the photoelectric conversion element and configured to output an amplified signal based on the charge generated by the photoelectric conversion element,
- wherein the first substrate, the second substrate, and the third substrate are stacked and electrically connected.
An imaging device comprising:
- a light detecting device;
- an optical system that forms an image of incident light on a light reception surface of the light detecting imaging device;
- and
- a control circuit that controls the solid-state imaging device,
- wherein the light detecting device comprises:
- a first substrate including a photoelectric conversion element configured to generate a charge corresponding to a received light amount by photoelectric conversion;
- a second substrate including:
- at least a part of a current-voltage converter, the current-voltage converter being configured to convert a current produced by the charge into a voltage corresponding to the current;
- a subtractor coupled to the current-voltage converter and configured to generate a difference signal based on the voltage from the current-voltage converter at different timings;
- and
- a quantizer coupled to the subtractor and configured to quantize the difference signal into a digital signal by comparing the difference signal with a threshold voltage;
- and
- a third substrate including an amplification circuit coupled to the photoelectric conversion element and configured to output an amplified signal based on the charge generated by the photoelectric conversion element,
- wherein the first substrate, the second substrate, and the third substrate are stacked and electrically connected.
Dependencies are inferred from the claim text.