Solid-state image pickup device

Details Solid-state image pickup device Solid-state image pickup device

1997-02-26

1999-05-25

Ho, Tuan V.

Television

Camera, system and detail

Solid-state image sensor

257230, H04N 5335

Patent

active

059073560

ABSTRACT:
In the solid-state image pickup device of the present invention, a two-layer structure of the second diffusion layer of the first conductive type and the third diffusion layer of the first conductive type that has a higher density is uniformly formed as an isolation area along a transfer channel between each photodiode string and each vertical CCD register. Therefore, a constant effective width for the transfer channel is provided and a preferable transfer efficiency is achieved. Further, the occurrence of a punch-through between the photodiode and the vertical CCD register can be prevented, isolation between the photodiode and the vertical CCD register can be ensured, and the reading of electric charges from the photodiode to the vertical CCD register can be performed at a lower voltage.

REFERENCES:
patent: 5471246 (1995-11-01), Nishima et al.
patent: 5619049 (1997-04-01), Kim

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