Pixel having two semiconductor layers, image sensor including the pixel, and image processing system including the image sensor
First Claim
Patent Images
1. An image sensor comprising:
- a first patterned semiconductor layer;
a second patterned semiconductor layer;
and an interlayer insulating layer interposed between the first patterned semiconductor layer and the second patterned semiconductor layer;
a photodiode, having an N-type region and a P-type region, wherein the P-type region envelops the N-type region, formed in the second patterned semiconductor layer; and
at least one transistor formed in the first patterned semiconductor layer.
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Abstract
An image sensor having pixels that include two patterned semiconductor layers. The top patterned semiconductor layer contains the photoelectric elements of pixels having substantially 100% fill-factor. The bottom patterned semiconductor layer contains transistors for detecting, resetting, amplifying and transmitting signals charges received from the photoelectric elements. The top and bottom patterned semiconductor layers may be separated from each other by an interlayer insulating layer that may include metal interconnections for conducting signals between devices formed in the patterned semiconductor layers and from external devices.
59 Citations
22 Claims
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1. An image sensor comprising:
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a first patterned semiconductor layer; a second patterned semiconductor layer; and an interlayer insulating layer interposed between the first patterned semiconductor layer and the second patterned semiconductor layer; a photodiode, having an N-type region and a P-type region, wherein the P-type region envelops the N-type region, formed in the second patterned semiconductor layer; and at least one transistor formed in the first patterned semiconductor layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. An image sensor comprising:
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a photodiode having an N-type semiconductor region and a P-type semiconductor region, wherein the P-type region envelops the N-type region, wherein the N-type region is formed in a second patterned semiconductor layer; and
the P-type region enveloping the N-type region is formed in the second patterned semiconductor layer,wherein the photodiode is formed in the second patterned semiconductor layer, and further comprising; a first patterned semiconductor layer formed below the second patterned semiconductor layer; a transfer transistor formed in the second patterned semiconductor layer for transferring signal charges from the photodiode to a second charge collection region in the first patterned semiconductor layer, wherein the gate of the transfer transistor is formed in the second patterned semiconductor layer; and an interlayer insulating layer interposed between the first patterned semiconductor layer and the second patterned semiconductor layer. - View Dependent Claims (21, 22)
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Specification