Solid-state image pickup unit and electronic apparatus for achieving high sensitivity and high saturation charge amount
First Claim
1. A solid-state image pickup unit, comprising:
- a substrate;
a photoelectric conversion section on a light incident side of the substrate, wherein the photoelectric conversion section is configured to generate a signal charge based on a light amount;
a first charge accumulation section in the substrate on the light incident side, wherein the first charge accumulation section is configured to accumulate the signal charge generated by the photoelectric conversion section;
a second charge accumulation section in a first region, other than a light-condensing region, on a side opposite to the light incident side, and laminated together with the first charge accumulation section in a depth direction of the substrate, wherein the light-condensing region is a second region where incident light is condensed in the substrate;
a floating diffusion section in a third region, other than the light-condensing region in the substrate, on the side opposite to the light incident side, wherein the floating diffusion section is configured to convert the signal charge into a voltage;
a discharge section in the light-condensing region in the substrate on the side opposite to the light incident side, wherein the discharge section is configured to discharge a charge from the first charge accumulation section; and
a vertical gate electrode configured to discharge the charge from the first charge accumulation section to the discharge section.
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Accused Products
Abstract
There is configured a solid-state image pickup unit including a photoelectric conversion section formed on a light incident side of a substrate; a first charge accumulation section accumulating a signal charge generated by the photoelectric conversion section; a second charge accumulation section formed in a region other than a light-condensing region where incident light is condensed in the substrate on a side opposite to a light incident side and formed to be laminated together with the first charge accumulation section in a depth direction of the substrate; and a floating diffusion section formed in a region other than the light-condensing region in the substrate on the side opposite to the light incident side and converting the signal charge into a voltage.
16 Citations
17 Claims
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1. A solid-state image pickup unit, comprising:
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a substrate; a photoelectric conversion section on a light incident side of the substrate, wherein the photoelectric conversion section is configured to generate a signal charge based on a light amount; a first charge accumulation section in the substrate on the light incident side, wherein the first charge accumulation section is configured to accumulate the signal charge generated by the photoelectric conversion section; a second charge accumulation section in a first region, other than a light-condensing region, on a side opposite to the light incident side, and laminated together with the first charge accumulation section in a depth direction of the substrate, wherein the light-condensing region is a second region where incident light is condensed in the substrate; a floating diffusion section in a third region, other than the light-condensing region in the substrate, on the side opposite to the light incident side, wherein the floating diffusion section is configured to convert the signal charge into a voltage; a discharge section in the light-condensing region in the substrate on the side opposite to the light incident side, wherein the discharge section is configured to discharge a charge from the first charge accumulation section; and a vertical gate electrode configured to discharge the charge from the first charge accumulation section to the discharge section. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. An electronic apparatus, comprising:
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an optical lens; a solid-state image pickup unit including a substrate, a photoelectric conversion section, a first charge accumulation section, a second charge accumulation section, and a floating diffusion section, wherein the photoelectric conversion section is on a light incident side of the substrate, and is configured to generate a signal charge based on a light amount, wherein the first charge accumulation section is in the substrate on the light incident side, and is configured to accumulate the signal charge generated by the photoelectric conversion section, wherein the second charge accumulation section is in a first region, other than a light-condensing region, on a side opposite to the light incident side, and laminated together with the first charge accumulation section in a depth direction of the substrate, wherein the light-condensing region is a second region where incident light is condensed in the substrate, and wherein the floating diffusion section is formed in a third region, other than the light-condensing region in the substrate, on the side opposite to the light incident side, and is configured to convert the signal charge into a voltage; a discharge section in the light-condensing region in the substrate on the side opposite to the light incident side, wherein the discharge section is configured to discharge a charge from the first charge accumulation section; a vertical gate electrode configured to discharge the charge from the first charge accumulation section to the discharge section; and a signal processing circuit configured to process an output signal from the solid-state image pickup unit.
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Specification