Interline charge coupled device solid state image sensor

Details Interline charge coupled device solid state image sensor Interline charge coupled device solid state image sensor

1997-03-27

1998-10-27

Ngo, Ngan V.

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

Field effect device

Charge transfer device

257221, 257232, 257233, H01L 27148, H01L 29768

Patent

active

058280910

ABSTRACT:
The present invention provides an interline solid state image sensor comprising the following elements. A plurality of vertical charge coupled device resistors are provided, each of which extends in a vertical direction. The vertical charge coupled device resistors are parallel to each other. A plurality of photo-diodes are aligned along one side of each of the vertical charge coupled device resistors so that the photo-diodes are aligned between adjacent two vertical charge coupled device resistors. Each of the photo-diodes is connected via a charge read-out gate region to the vertical charge coupled device resistor. Each of the vertical charge coupled device resistor comprises laminations of a first conductivity type diffusion layer and a second conductivity type diffusion layer extending under the first conductivity type diffusion layer. A lateral charge coupled resistor extends in a lateral direction. The lateral charge coupled resistor is coupled with ends of the vertical charge coupled device resistors. It is important for the present invention that the second conductivity type diffusion layer varies in impurity concentration in the lateral direction so that opposite side regions of the second conductivity type diffusion layer are higher in impurity concentration than a center region of the second conductivity type diffusion layer.

REFERENCES:
patent: 5455443 (1995-10-01), Maks et al.
patent: 5656875 (1997-08-01), Komobuchi
patent: 5668390 (1997-09-01), Morimoto

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