PIXEL HAVING TWO SEMICONDUCTOR LAYERS, IMAGE SENSOR INCLUDING THE PIXEL, AND IMAGE PROCESSING SYSTEM INCLUDING THE IMAGE SENSOR

摘要

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.

主权项

1. An image sensor including a plurality of pixels, each pixel comprising:
a first semiconductor layer having at least one transistor; a first interlayer insulating layer disposed on the first semiconductor layer; a second interlayer insulating layer disposed on the first interlayer insulating layer; a second semiconductor layer having a photodiode that includes an N-type region and a P-type region, the second semiconductor layer being disposed on the second interlayer insulating layer; a first conductive plug that penetrates the first interlayer insulating layer and is electrically connected to the first semiconductor layer; a second conductive plug that penetrates the second interlayer insulating layer and is electrically connected to the second semiconductor layer; and a conductive pattern between the first and second semiconductor layers, wherein the first semiconductor layer is electrically connected to the second semiconductor layer by the conductive pattern.