Solid state image sensor with shaped photodiodes

Details Solid state image sensor with shaped photodiodes Solid state image sensor with shaped photodiodes

1994-07-14

1996-01-30

Mintel, William

Active solid-state devices (e.g., transistors, solid-state diode

Field effect device

Charge transfer device

257232, 257233, 257448, 257432, H01L 2714, H01L 3100

Patent

active

054882397

ABSTRACT:
A solid state image sensor including (a) a plurality of photodiodes arranged such that the photodiodes in odd number columns and the photodiodes in even number columns straddle each other, for generating image signal charges by converting light signals into electrical signals, (b) vertical charge coupled devices each formed between the photodiode columns for vertically transmitting the image signal charges generated in each of the photodiodes, and (c) a plurality of microlenses each arranged matched with each of the plurality of photodiodes over each of the photodiodes. Each of the photodiodes is shaped like a peanut shell having a narrower middle part. The photodiodes shape is thereby matched to the focusing shape of each matching microlens, optimizing the cell layout efficiency.

REFERENCES:
patent: 4602289 (1986-07-01), Sekine
patent: 5274476 (1993-12-01), Lee
patent: 5306906 (1994-04-01), Aoki et al.
Mizouchi et al, "1/3-Inch 360 Kpixel IT-CCD Image Sensor," The Journal of the Institute of Television Engineers of Japan, vol. 47, No. 2, 1993, pp. 197-202.

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