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US 7,679,112 B2Granted
Color image sensors having pixels with cyan-type and yellow-type color characteristics therein
AssigneeSamsung Electronics Co., Ltd.
InventorTetsuo Asaba
Life of this patent
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Abstract
Color image sensors include pixels having varying color characteristics. One of the pixels is a cyan-type pixel, which includes primary and secondary photodetectors therein. The primary photodetector extends adjacent a portion of a surface of a semiconductor substrate that is configured to receive visible light incident thereon. The secondary photodetector is buried in the semiconductor substrate. The secondary photodetector is configured to receive visible light that has passed through the primary photodetector.
Claims7
An image sensor, comprising:
- a primary photodetector extending adjacent a portion of a surface of a semiconductor substrate configured to receive visible light incident thereon, said primary photodetector comprising a first photodiode in the semiconductor substrate
- a secondary photodetector buried in the semiconductor substrate, said secondary photodetector comprising a second photodiode having a cathode electrically connected to a node of the image sensor biased at a first voltage;
- and
- a transfer transistor having a first source/drain region electrically connected to a cathode of the first photodiode and a channel region that forms a non-rectifying semiconductor junction with an anode of the second photodiode.
1 more element
Dependencies are inferred from the claim text.