Semiconductor fuse blowing and verifying method and apparatus

Details Semiconductor fuse blowing and verifying method and apparatus Semiconductor fuse blowing and verifying method and apparatus

1988-12-08

1990-06-26

Zazworsky, John

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307441, 307219, H03K 1700, H03K 19003

Patent

active

049374656

ABSTRACT:
One or more selected fuses among a plurality of fuses are blown by using electronic means to discharge a capacitor and route the resulting current spike to the selected fuse. Also, a driver output current is approximated by measuring suply currents for an unloaded output and for a loaded output and comparing the two supply currents. If the driver output is connected to the active end of a fuse, the supply current demanded by the driver indicates a state of the fuse. The invention finds particular utility when used on an integrated circuit memory array with fuse activated redundancy.

REFERENCES:
patent: 3666967 (1972-05-01), Keister et al.
patent: 3882324 (1975-05-01), Smolker et al.
patent: 4446534 (1984-05-01), Smith
patent: 4621201 (1986-11-01), Amdahl et al.
patent: 4714839 (1987-12-01), Chung
patent: 4791319 (1988-12-01), Tagami et al.

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