CMOS sensor array with a shared structure

Details CMOS sensor array with a shared structure CMOS sensor array with a shared structure

2007-07-17

2007-07-17

Lee, John R. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

C348S308000

Reexamination Certificate

active

11342010

ABSTRACT:
A CMOS sensor array includes a plurality of unit blocks. A unit block includes: N pairs of photo diode regions arranged in a first direction; 2N transfer transistors respectively corresponding to the photo diode regions, wherein each of the transfer transistors is formed at a corner of the corresponding photo diode region, and wherein for each pair of photo diode regions the two corresponding transfer transistors symmetrically oppose each other; N floating diffusion nodes, wherein each of the floating diffusion nodes is respectively arranged between a pair of photo diode regions, and wherein each of the floating diffusion nodes is shared by the two corresponding transfer transistors and the pair of photo diode regions; at least one metal line for coupling the floating diffusion nodes; a reset transistor for resetting a voltage of the floating diffusion nodes; a readout circuit including at least one transistor for sampling the floating diffusion node, wherein the reset transistor and the readout circuit are disposed between the pair of photo diode regions.

REFERENCES:
patent: 2006/0138489 (2006-06-01), Ahn et al.
patent: 2006/0175538 (2006-08-01), Kim et al.
patent: 2006/0267052 (2006-11-01), McKee
patent: 11-195776 (1999-07-01), None
patent: 2003-230055 (2003-08-01), None
patent: 10-2004-0033366 (2004-04-01), None

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