Antifuse device for controlling current in a circuit using an an

Active solid-state devices (e.g. – transistors – solid-state diode – Non-single crystal – or recrystallized – semiconductor... – Non-single crystal – or recrystallized – active junction...

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257 77, 257530, H01L 23525, H01L 2912

Patent

active

054344328

ABSTRACT:
A device (10) for controlling current through a circuit has an antifuse material (18) separating a first conductor (12) and a second conductor (20). An insulating element (14) and another insulating element (16) further separate the first conductor (12) from the second conductor (20). The antifuse material (18) includes a dopant which raises the band gap and seals off paths in grain boundaries of the antifuse material (18) in order to limit leakage current from flowing between the first conductor (12) and the second conductor (20). When an interconnection is desired, a high voltage pulse is applied across the first conductor (12) and the second conductor (20) to initially break down the antifuse material (18). The breakdown of the antifuse material (18) causes a filament (22) to form between the first conductor (12) and the second conductor (20). The filament (22) creates a conduction path connecting the first conductor (12) and the second conductor (20) electrically together. Additional current is forced through the antifuse material (18) to permanently set the filament (22) in order to interconnect circuit elements coupled to the first conductor (12) and the second conductor (20).

REFERENCES:
patent: 4499557 (1985-02-01), Holmberg et al.
patent: 4748490 (1988-05-01), Hollingsworth
patent: 5093711 (1992-03-01), Hirakawa

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