Patent US4841395A successfully refreshed from Google Patents.
US4841395A
Expired / Lapsed
US
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Static electricity discharge device for a magnetic head
Assignee: Seagate Technology LLC
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Filing: 1988-03-21
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Granted: 1989-06-20
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Expires: 2008-03-21
Abstract
Abstract A static electricity discharge device for a magnetic head formed by providing a recess to expose one of the conductors connected to the head's magnetic circuits. Static electricity buildup on the conductors discharges through the exposed portion of the conductor rather than through the pole pieces of the magnetic circuits.
Inventors
- 👤 David C. Craft
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:55
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/31; G11B5/3103; G11B5/40
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
109 words
In a magnetic head having a non magnetic dielectric material with an outer surface, a set of magnetic circuits, including at least one pole exposed at said outer surface, and a plurality of conductors extending from said magnetic circuits through said non magnetic dielectric material, said non magnetic dielectric material mounted on a conductive body, the improvement comprising: a recess formed in said non magnetic dielectric material sufficiently deep to expose a portion of one of said conductors to provide a static electricity discharge path between said exposed portion of said one of said conductors and said conductive body along said outer surface of said non magnetic dielectric material.
Claim 2
Dependent Claim
109 words
In a magnetic head having a non magnetic dielectric material with an outer surface, a set of magnetic circuits, including at least one pole exposed at said outer surface, and a plurality of conductors extending from said magnetic circuits through said non magnetic dielectric material, said non magnetic dielectric material mounted on a conductive body, the improvement comprising: a recess formed in said non magnetic dielectric material sufficiently deep to expose a portion of one of said conductors to provide a static electricity discharge path between said exposed portion of said one of said conductors and said conductive body along said outer surface of said non magnetic dielectric material.
Claim 3
Dependent Claim
121 words
In a magnetic head having a non magnetic dielectric material with an outer surface, a set of magnetic circuits, including at least one pole exposed at said outer surface, a plurality of conductors extending from said magnetic circuits through said non magnetic dielectric material, said non magnetic dielectric material mounted on a conductive slider, and at least one recess formed in said non magnetic dielectric material, the recess aiding the flying characteristics of said slider, the improvement comprising: deepening the recess to expose a portion of one of said conductors to provide a static electricity discharge path between said exposed portion of said one of said conductors and said conductive slider along said outer surface of said non magnetic dielectric material.
Claim 4
Dependent Claim
121 words
In a magnetic head having a non magnetic dielectric material with an outer surface, a set of magnetic circuits, including at least one pole exposed at said outer surface, a plurality of conductors extending from said magnetic circuits through said non magnetic dielectric material, said non magnetic dielectric material mounted on a conductive slider, and at least one recess formed in said non magnetic dielectric material, the recess aiding the flying characteristics of said slider, the improvement comprising: deepening the recess to expose a portion of one of said conductors to provide a static electricity discharge path between said exposed portion of said one of said conductors and said conductive slider along said outer surface of said non magnetic dielectric material.
Claim 5
Dependent Claim
129 words
In a magnetic head having a non magnetic dielectric material with an outer surface, a set of magnetic circuits, including at least one pole exposed at said outer surface, a plurality of conductors extending from said magnetic circuits through said non magnetic dielectric material, said non magnetic dielectric material mounted on a conductive slider, and at least one recess formed in said non magnetic dielectric material, the recess aiding the flying characteristics of said slider, the improvement comprising: broadening at least one of said conductors adjacent the recess to expose a portion of said one of said conductors to provide a static electricity discharge path between said exposed portion of said one of said conductors and said conductive slider along said outer surface of said non magnetic dielectric material.
Claim 6
Dependent Claim
129 words
In a magnetic head having a non magnetic dielectric material with an outer surface, a set of magnetic circuits, including at least one pole exposed at said outer surface, a plurality of conductors extending from said magnetic circuits through said non magnetic dielectric material, said non magnetic dielectric material mounted on a conductive slider, and at least one recess formed in said non magnetic dielectric material, the recess aiding the flying characteristics of said slider, the improvement comprising: broadening at least one of said conductors adjacent the recess to expose a portion of said one of said conductors to provide a static electricity discharge path between said exposed portion of said one of said conductors and said conductive slider along said outer surface of said non magnetic dielectric material.
Claim 7
Dependent Claim
133 words
In a magnetic head having a non magnetic dielectric material with an outer surface, a set of magnetic circuits, including at least one pole exposed at said outer surface, a plurality of conductors extending from said magnetic circuits through said non magnetic dielectric material, said non magnetic dielectric material mounted on a conductive slider, and at least one recess formed in said non magnetic dielectric material, the recess aiding the flying characteristics of said slider, the improvement comprising: deepening the recess and broadening at least one of said conductors adjacent the recess to expose a portion of said one of said conductors to provide a static electricity discharge path between said exposed portion of said one of said conductors and said conductive slider along said outer surface of said non magnetic dielectric material.
Claim 8
Dependent Claim
133 words
In a magnetic head having a non magnetic dielectric material with an outer surface, a set of magnetic circuits, including at least one pole exposed at said outer surface, a plurality of conductors extending from said magnetic circuits through said non magnetic dielectric material, said non magnetic dielectric material mounted on a conductive slider, and at least one recess formed in said non magnetic dielectric material, the recess aiding the flying characteristics of said slider, the improvement comprising: deepening the recess and broadening at least one of said conductors adjacent the recess to expose a portion of said one of said conductors to provide a static electricity discharge path between said exposed portion of said one of said conductors and said conductive slider along said outer surface of said non magnetic dielectric material.
References Cited (Backward Citations)
US4317149A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-06-19 | 1992-12-19 | 1993-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-19 | 1996-12-19 | 1997-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-19 | 2000-12-19 | 2001-06-20 | $7700.00 | Window Closed / Lapsed |