Patent Number: 6,166,768

Title: Active pixel sensor array with simple floating gate pixels

Abstract: An imaging device formed as a monolithic complementary metal oxide semiconductor integrated circuit in an industry standard complementary metal oxide semiconductor process, the integrated circuit including a focal plane array of pixel cells, each one of the cells including a photogate overlying the substrate for accumulating photo-generated charge in an underlying portion of the substrate and a charge coupled device section formed on the substrate adjacent the photogate having a sensing node and at least one charge coupled device stage for transferring charge from the underlying portion of the substrate to the sensing node. There is also a readout circuit, part of which can be disposed at the bottom of each column of cells and be common to all the cells in the column. A Simple Floating Gate (SFG) pixel structure could also be employed in the imager to provide a non-destructive readout and smaller pixel sizes.

Inventors: Fossum; Eric R. (La Crescenta, CA), Nakamura; Junichi (Tokyo, JP), Kemeny; Sabrina E. (La Crescenta, CA)

Assignee: California Institute of Technology

International Classification: H04N 3/15 (20060101); H01L 31/0216 (20060101); H01L 27/148 (20060101); H04N 5/335 (20060101); G11C 19/28 (20060101); G11C 19/00 (20060101); H04N 9/04 (20060101); H01L 31/0232 (20060101); H01L 27/146 (20060101); H04N 003/14 ()

Expiration Date: 12/26/2017