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US 11,107,852 B2Granted
Light receiving element having light blocking section covering at least part of amplifier circuit, light receiving module , photoelectric sensor and biological information measurement
AssigneeSeiko Epson Corporation
InventorsTsukasa Kosuda, Atsushi Matsuo
Life of this patent
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Abstract
A light receiving element includes a silicon substrate, a photodiode, an amplifier circuit adapted to amplify an output signal from the photodiode, and a light blocking section adapted to cover at least a part of the amplifier circuit to block light, and the photodiode, the amplifier circuit and the light blocking section are provided to the silicon substrate.
Claims25
A light receiving element comprising:
- a silicon substrate;
- a photodiode adapted to detect light;
- an amplifier circuit adapted to amplify an output signal from the photodiode;
- and
- a light blocking section adapted to cover at least a part of the amplifier circuit to block the light, wherein
- the photodiode, the amplifier circuit and the light blocking section are provided to the silicon substrate,
- the silicon substrate has a first surface on which the photodiode and the amplifier circuit are disposed,
- the amplifier circuit has a p-n junction part on the first surface, and
- an end part of the light blocking section is located between the p-n junction part and the photodiode in a cross-sectional view from a direction perpendicular to a normal line of the first surface.
6 more elements
Dependencies are inferred from the claim text.