Having parastic shield for electrostatic discharge protection

Details Having parastic shield for electrostatic discharge protection Having parastic shield for electrostatic discharge protection

1995-06-07

1998-06-02

Cao, Allen

Dynamic magnetic information storage or retrieval

Head

Hall effect

G11B 5127

Patent

active

057610096

ABSTRACT:
A magneto-resistive read head having a "parasitic shield" provides an alternative path for currents associated with sparkovers, thus preventing such currents from damaging the read head. The parasitic shield is provided in close proximity to a conventional magnetic shield. The electrical potential of parasitic shield is held essentially equal to the electrical potential of the sensor element. If charges accumulate on the conventional shield, current will flow to the parasitic shield at a lower potential than would be required for current to flow between the conventional shield and the sensor element. Alternatively, conductive spark gap devices are electrically coupled to sensor element leads and to each magnetic shield. Each spark gap device is brought within very close proximity of the substrate to provide an alternative path for charge that builds up between the sensor element and the substrate to be discharged. The ends of the spark gaps that are brought into close proximity of the substrate are preferably configured with high electric field density inducing structures which reduce the voltage required to cause a sparkover between the spark gap device and the substrate.

REFERENCES:
patent: 3940797 (1976-02-01), Brock et al.
patent: 4663685 (1987-05-01), Tsang
patent: 4879610 (1989-11-01), Jove et al.
patent: 4907113 (1990-03-01), Mallary
patent: 4918554 (1990-04-01), Bajorek et al.
patent: 4935832 (1990-06-01), Das et al.
patent: 5103553 (1992-04-01), Mallary
patent: 5111352 (1992-05-01), Das et al.
patent: 5272582 (1993-12-01), Shibata et al.
patent: 5323285 (1994-06-01), Smith
patent: 5465186 (1995-11-01), Bajorek et al.
patent: 5491605 (1996-02-01), Hughbanks et al.
patent: 5539598 (1996-07-01), Denison et al.
IBM Technical Disclosure Bulletin, "Electrostatic Shielding for Magnetoresistive Read Heads", vol. 21, No. 11, Apr. 1979.

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