Repair circuitry with an enhanced ESD protection device

Details Repair circuitry with an enhanced ESD protection device Repair circuitry with an enhanced ESD protection device

2006-08-30

2009-06-23

Nguyen, Danny (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

Load shunting by fault responsive means

C361S111000

Reexamination Certificate

active

07551415

ABSTRACT:
A repair circuitry consisting of at least one electrical fuse forming part of a conduction path between a positive voltage supply (Vq) pad and a complimentary lower voltage supply source (Vss). The repair circuitry includes at least one switching device and at least one control circuitry. The at least one switching device has a control terminal and is coupled between the Vq pad and the at least one electrical fuse. The at least one control circuitry is coupled to the control terminal and the Vq pad respectively. Upon an application of a positive high voltage to the Vq pad, the control circuitry delays the turned-on state of the switching device for a predetermined period of time, thereby blocking stray currents occurred during ESD events. Consequently, the repair circuitry can prevent the at least one electrical fuse from being mistakenly programmed.

REFERENCES:
patent: 6385021 (2002-05-01), Takeda et al.
patent: 7102862 (2006-09-01), Lien et al.
patent: 7271989 (2007-09-01), Huang et al.

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