Static information storage and retrieval – Read/write circuit – Having fuse element
Patent
1998-01-27
2000-02-01
Nelms, David
Static information storage and retrieval
Read/write circuit
Having fuse element
365200, G11C 700
Patent
active
060210788
ABSTRACT:
A fuse circuit (30) uses circuitry (34, 36, 38) which is coupled between each terminal (A, B) of a fuse (32) for the purpose of maintaining each fuse terminal at the same voltage potential or within a predetermined voltage differential. When copper fuses are implemented, the fuse circuit eliminates the tendency for copper corrosion which may result in growth-back of the copper between the two fuse terminals (A, B). By fixing the voltage at each fuse terminal at a specific potential relative to the other terminal, effects of metal growth-back are eliminated. In another form, a bias scheme is used to place a fixed voltage between the fuse terminals to guarantee a minimum voltage differential across the fuse terminals after the fuse is blown. A differential in the voltage at the fuse terminals is sensed in order to indicate the status of the fuse's conductivity.
REFERENCES:
patent: 4446534 (1984-05-01), Smith
patent: 5301159 (1994-04-01), Lee
patent: 5384727 (1995-01-01), Moyal et al.
patent: 5426614 (1995-06-01), Harward
patent: 5818285 (1998-10-01), Lee et al.
patent: 5896328 (1999-04-01), Tanizaki et al.
Le Toan V.
Taylor Scott A.
International Business Machines - Corporation
King Robert L.
Motorola Inc.
Nelms David
Nguyen Hien
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