Flash memory array having well contact structures

Details Flash memory array having well contact structures Flash memory array having well contact structures

1997-09-25

1999-10-26

Chaudhuri, Olik

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

Field effect device

Having insulated electrode

257371, 257316, H01L 2976, H01L 2994, H01L 31062, H01L 31113

Patent

active

059733748

ABSTRACT:
A common source flash memory array providing multiple well contact structures distributed within the array without the need for separate well tap regions connected to dedicated channel lines. The contact locations between Vss metal common source lines and source bus regions are used to provide additional contacts between Vss metal lines and p+ well taps, all of the source bus regions and the p+ well tap regions being encompassed within a double-well configuration. Depending on the specific embodiment of the present invention, the n+ diffused source bus regions and the nearby p+ well tap may: (a) be separately tied to the Vss metal common source line through separate contact metals (e.g., tungsten plugs); (b) be butted against each other and tied to a common Vss metal source line through separate contact metals; (c) be butted against each other and tied to a common Vss metal source line through a common contact metal (e.g., an enlarged plug) overlapping both the n+ diffused source bus regions and the p+ well tap; or (d) be tied to a common Vss metal source line through a common contact metal and a metal silicide layer.

REFERENCES:
patent: 4837051 (1989-06-01), Farb et al.
patent: 5177586 (1993-01-01), Ishimura et al.
patent: 5541875 (1996-07-01), Liu et al.
patent: 5576570 (1996-11-01), Ohsawa et al.
patent: 5610550 (1997-03-01), Furutani
patent: 5615152 (1997-03-01), Bergemont
patent: 5654572 (1997-08-01), Kawase
patent: 5744843 (1998-04-01), Efland et al.

Affiliated with

Also associated with

Rating

Flash memory array having well contact structures does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Flash memory array having well contact structures, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Flash memory array having well contact structures will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-767764