Non-volatile static random access memory

Details Non-volatile static random access memory Non-volatile static random access memory

2006-03-28

2006-03-28

Elms, Richard (Department: 2824)

Static information storage and retrieval

Systems using particular element

Flip-flop

C365S185080, C365S185070, C365S185010

Reexamination Certificate

active

07020007

ABSTRACT:
Non-volatile SRAMs having an improved recall characteristic are disclosed. An illustrated non-volatile SRAM includes a plurality of unit memory cells arranged in an array. Each of the plurality of unit memory cells comprises a SRAM unit and a non-volatile circuit. The non-volatile circuit includes storage transistors, SONOS transistors connected to the storage transistors, and recall transistors connected to the SONOS transistors. The thickness of the gate insulation films of the recall transistors is thinner than the thickness of the gate insulation films of the storage transistors.

REFERENCES:
patent: 5602776 (1997-02-01), Herdt et al.
patent: 5986932 (1999-11-01), Ratnakumar et al.

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