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US 2026/0227494 A1Published application
Photodetector and distance measurement system
AssigneeSony Semiconductor Solutions Corporation
InventorsMASATAKA YAMANE, YHANG SILVA, TAKAHIRO TOYOSHIMA, YOSHIAKI TASHIRO
Life of this patent
Estimating the term…
Abstract
A photodetector includes: a SPAD that is provided in a first region of a first base, and amplifies a carrier generated by an incident photon; one or more elements that are provided in a second region adjacent to the first region of the first base in a plane direction of the first base, and are different from the SPAD; and an insulating isolator that is provided between the first region and the second region, and at least electrically isolates the SPAD and the one or more elements from each other.
Claims26
A photodetector comprising:
- an avalanche diode that is provided in a first region of a first base, and amplifies a carrier generated by an incident photon;
- one or more elements that are provided in a second region adjacent to the first region of the first base in a plane direction of the first base, and are different from the avalanche diode;
- and
- an insulating isolator that is provided between the first region and the second region, and at least electrically isolates the avalanche diode and the one or more elements from each other.
1 more element
A distance measurement system comprising:
- a photodetector;
- and
- a circuit device, wherein
- the photodetector includes
- an avalanche diode that is provided in a first region of a first base, and amplifies a carrier generated by an incident photon,
- a protective circuit that is provided in a second region adjacent to the first region of the first base in a plane direction of the first base, and includes one or more elements that reduce an overcurrent from the avalanche diode, and
- an insulating isolator that is provided between the first region and the second region, and at least electrically isolates the avalanche diode and the one or more elements from each other, and
- the circuit device includes
- a readout circuit that is electrically coupled to the avalanche diode via the protective circuit, and reads out the amplified carrier, and
- a time measurement circuit that is electrically coupled to the readout circuit, and measures time of flight of light.
7 more elements
A photodetector comprising:
- an avalanche diode that is provided in a first region of a first base, and amplifies a carrier generated by an incident photon;
- a light-receiving element that is provided in a second region adjacent to the first region of the first base in a plane direction of the first base, and converts incident light into electric charge;
- and
- an insulating isolator that is provided between the first region and the second region, and at least electrically isolates the avalanche diode and the light-receiving element from each other.
1 more element
A distance measurement system comprising:
- a photodetector;
- a first time measurement circuit;
- and
- a second time measurement circuit, wherein
- the photodetector includes
- an avalanche diode that is provided in a first region of a first base, and amplifies a carrier generated by an incident photon,
- a light-receiving element that is provided in a second region adjacent to the first region of the first base in a plane direction of the first base, and converts incident light into electric charge, and
- an insulating isolator that is provided between the first region and the second region, and at least electrically isolates the avalanche diode and the light-receiving element from each other,
- the first time measurement circuit is electrically coupled to the avalanche diode, and measures time of flight of light, and
- the second time measurement circuit is electrically coupled to the light-receiving element, and measures time of flight of light at a shorter distance than the first time measurement circuit.
7 more elements
A photodetector comprising:
- an avalanche diode that is provided in a first region of a first base, and amplifies a carrier generated by an incident photon;
- a charge storage type photodiode that is provided in a second region adjacent to the first region of the first base in a plane direction of the first base, and converts incident light into electric charge;
- and
- an insulating isolator that is provided between the first region and the second region, and at least electrically isolates the avalanche diode and the charge storage type photodiode from each other.
1 more element
A distance measurement system comprising:
- a photodetector;
- a time measurement circuit;
- and
- an analog-to-digital convertor circuit, wherein
- the photodetector includes
- an avalanche diode that is provided in a first region of a first base, and amplifies a carrier generated by an incident photon,
- a charge storage type photodiode that is provided in a second region adjacent to the first region of the first base in a plane direction of the first base, and converts incident light into electric charge, and
- an insulating isolator that is provided between the first region and the second region, and at least electrically isolates the avalanche diode and the charge storage type photodiode from each other,
- the time measurement circuit is electrically coupled to the avalanche diode, and measures time of flight of light, and
- the analog-to-digital convertor circuit is electrically coupled to the charge storage type photodiode, and converts electric charge from an analog signal to a digital signal.
7 more elements
Dependencies are inferred from the claim text.