Method and apparatus for reduced fatigue in ferroelectric memory

Details Method and apparatus for reduced fatigue in ferroelectric memory Method and apparatus for reduced fatigue in ferroelectric memory

1995-02-27

1996-04-16

Nelms, David C.

Static information storage and retrieval

Systems using particular element

Ferroelectric

365149, G11C 1112

Patent

active

055089542

ABSTRACT:
A method and apparatus for programming ferroelectric memory cells which reduces polarizability fatigue effects of switching polarization of the ferroelectric devices associated with the memory cells such as ferroelectric capacitors and transistors. Alteration of the pulse width duty cycle associated with signals used to switch ferroelectric device polarization is shown to reduce polarizability fatigue of the ferroelectric material thereby increasing the useful life of ferroelectric memory cells. Methods and apparatus for producing a signal pulse duty cycle in the range 2-30% is disclosed and shown to improve the useful life of the ferroelectric material.

REFERENCES:
patent: 4888733 (1989-12-01), Mobley
patent: 4893272 (1990-01-01), Eaton, Jr. et al.
patent: 4910708 (1990-03-01), Eaton, Jr. et al.
patent: 5086412 (1992-02-01), Jaffe et al.
patent: 5270967 (1993-12-01), Moazzami et al.

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