IMAGING DEVICE INCLUDING UNIT PIXEL CELL
First Claim
1. An imaging device comprising:
- a unit pixel cell comprisinga photoelectric converter that converts incident light into signal charge,a semiconductor substrate,a charge storage region that is located in the semiconductor substrate and stores the signal charge, anda signal detection circuit that detects the signal charge;
a feedback circuit that negatively feeds back output of the signal detection circuit and comprises a signal line; and
at least one wiring layer that is located between the semiconductor substrate and the photoelectric converter, the at least one wiring layer including a portion of the signal line, the portion of the signal line overlapping the unit pixel cell in a plan view,wherein in the plan view, the portion of the signal line is located on an opposite side from the charge storage region across a center line of the unit pixel cell, the center line being in parallel with a direction in which the signal line extends.
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Abstract
An imaging device of the present disclosure includes: a unit pixel cell comprising a photoelectric converter converting incident light into signal charge, a semiconductor substrate, a charge storage region located in the semiconductor substrate and storing the signal charge, and a signal detection circuit detecting the signal charge; a feedback circuit negatively feeding back output of the signal detection circuit and comprising a signal line; and at least one wiring layer located between the semiconductor substrate and the photoelectric converter. The at least one wiring layer includes a portion of the signal line, the portion overlapping the unit pixel cell in a plan view. In the plan view, the portion is located on an opposite side from the charge storage region across a center line of the unit pixel cell, the center line being in parallel with a direction in which the signal line extends.
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Citations
15 Claims
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1. An imaging device comprising:
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a unit pixel cell comprising a photoelectric converter that converts incident light into signal charge, a semiconductor substrate, a charge storage region that is located in the semiconductor substrate and stores the signal charge, and a signal detection circuit that detects the signal charge; a feedback circuit that negatively feeds back output of the signal detection circuit and comprises a signal line; and at least one wiring layer that is located between the semiconductor substrate and the photoelectric converter, the at least one wiring layer including a portion of the signal line, the portion of the signal line overlapping the unit pixel cell in a plan view, wherein in the plan view, the portion of the signal line is located on an opposite side from the charge storage region across a center line of the unit pixel cell, the center line being in parallel with a direction in which the signal line extends. - View Dependent Claims (3, 4, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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2. An imaging device comprising:
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a unit pixel cell comprising a photoelectric converter that converts incident light into signal charge, a semiconductor substrate, a charge storage region that is located in the semiconductor substrate and stores the signal charge, and a signal detection circuit that detects the signal charge, the signal detection circuit comprising an amplifier transistor and a feedback circuit that negatively feeds back output of the amplifier transistor; and at least one wiring layer that is located between the semiconductor substrate and the photoelectric converter, the at least one wiring layer including a portion of a signal line that is electrically connected with the amplifier transistor and reads out output of the signal detection circuit, the portion of the signal line overlapping the unit pixel cell in a plan view, wherein in the plan view, the portion of the signal line is located on an opposite side from the charge storage region across a center line of the unit pixel cell, the center line being in parallel with a direction in which the signal line extends. - View Dependent Claims (5, 15)
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Specification