Image sensor with photo diode gate

Details Image sensor with photo diode gate Image sensor with photo diode gate

2007-08-07

2007-08-07

Luu, Thanh X. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

C257S292000

Reexamination Certificate

active

10656165

ABSTRACT:
A photodiode has a photodiode gate structure on the surface of the substrate. The photodiode may be located in a pixel sensor cell comprising a substrate having a first surface level. The photodiode has a first doped region of a first conductivity type and a second doped region of a second conductivity type located beneath the first surface level of the substrate. A photodiode gate is formed of a first dielectric substance layer formed over the first surface of the substrate, thereby forming a second surface, and a second polysilicon layer formed over the second surface of the first layer. A transistor is located adjacent to the photodiode. The photodiode gate improves charge transfer from the photodiode to the transfer gate and floating diffusion region. The improved charge transfer minimizes image lag and leakage and reduces energy barriers.

REFERENCES:
patent: 5128735 (1992-07-01), Ohmi et al.
patent: 5313080 (1994-05-01), Jung
patent: 5625210 (1997-04-01), Lee et al.
patent: 6040593 (2000-03-01), Park
patent: 6140630 (2000-10-01), Rhodes
patent: 6204524 (2001-03-01), Rhodes
patent: 6310366 (2001-10-01), Rhodes et al.
patent: 6326652 (2001-12-01), Rhodes
patent: 6333205 (2001-12-01), Rhodes
patent: 6376868 (2002-04-01), Rhodes
patent: 6566697 (2003-05-01), Fox et al.
patent: 6809309 (2004-10-01), Kwon
patent: 6835590 (2004-12-01), Lee
patent: 2004/0089883 (2004-05-01), Kim

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