Antifuse programming by transistor snap-back

Details Antifuse programming by transistor snap-back Antifuse programming by transistor snap-back

1992-01-14

1993-10-26

Popek, Joseph A.

Static information storage and retrieval

Read only systems

Fusible

3652257, 257530, G11C 1700

Patent

active

052572226

ABSTRACT:
The present invention comprises a method to program antifuse elements in integrated circuits, such as programmable read-only memory (PROM) or option selections/redundancy repair on dynamic random access memories (DRAMs) by utilizing the phenomenon of transistor snap-back. Multiple programming pulses are applied to an NMOS transistor which provides access to the desired antifuse element. The first pulses applied ruptures the antifuse element causing it so become a resistive short. The second programming pulses cause the access NMOS transistor to go into snap-back thus allowing a surge of current to flow through the resistively shorted antifuse thereby lowering the resistance of the shorted antifuse element substantially allowing for less power consumption and higher reliability of the permanently programmed element.

REFERENCES:
patent: 5163180 (1992-11-01), Eltowkhy et al.

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