US5424890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetoresistance effect type thin film head
Assignee: Sony Corp
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Filing: 1994-08-24
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Granted: 1995-06-13
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Expires: 2014-08-24
Abstract
Abstract A magnetoresistance effect type thin film head (A) constructed in a manner that a magnetoresistance effect element, that is, an MR element (1) is disposed perpendicularly to a head surface a, and among two electrodes (2a) and (2b) led out from both ends of the MR element (1), the one electrode (2a) is exposed to the head surface a but the other electrode (2b) is not exposed to the head surface a, wherein the one electrode (2a) exposed to the head surface a is connected to a ground voltage Vss, thereby decreasing the change in voltage difference between the electrode (2a) of the MR element (1) and a disc surface b to prevent the electrical breakdown of the thin film head (A).
Inventors
- 👤 Hideo Suyama
- 👤 Tetsuo Sekiya
- 👤 Munekatsu Fukuyama
- 👤 Norio Saito
- 👤 Takuji Shibata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:55
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/33; G11B5/39; G11B5/40
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
86 words
A magnetoresistance effect type thin film head comprising: a magnetoresistance effect element provided in which the longitudinal direction of said magnetoresistance effect element is vertical to a head surface facing the recording medium, two electrodes substantially arranged in parallel and respectively formed at a fore end and a rear end of said magnetoresistance effect element, wherein the electrode formed at the fore end extends along said head surface away from said magnetoresistance element, and is exposed along said head surface and connected to a ground voltage.
Claim 2
Dependent Claim
86 words
A magnetoresistance effect type thin film head comprising: a magnetoresistance effect element provided in which the longitudinal direction of said magnetoresistance effect element is vertical to a head surface facing the recording medium, two electrodes substantially arranged in parallel and respectively formed at a fore end and a rear end of said magnetoresistance effect element, wherein the electrode formed at the fore end extends along said head surface away from said magnetoresistance element, and is exposed along said head surface and connected to a ground voltage.
Claim 3
Dependent Claim
102 words
A magnetoresistance effect type thin film head having a surface for cooperating with a magnetic medium comprising: a magnetoresistance effect element composed of two magnetic layers and a nonmagnetic layer therebetween, the longitudinal direction of said magnetoresistance effect element being vertical to a head surface facing the recording medium, two electrodes substantially arranged in parallel and respectively formed at a fore end and a rear end of said magnetoresistance effect element, wherein the electrode formed at the fore end extends along said head surface away from said magnetoresistance element, and is exposed along said head surface and connected to a ground voltage.
Claim 4
Dependent Claim
102 words
A magnetoresistance effect type thin film head having a surface for cooperating with a magnetic medium comprising: a magnetoresistance effect element composed of two magnetic layers and a nonmagnetic layer therebetween, the longitudinal direction of said magnetoresistance effect element being vertical to a head surface facing the recording medium, two electrodes substantially arranged in parallel and respectively formed at a fore end and a rear end of said magnetoresistance effect element, wherein the electrode formed at the fore end extends along said head surface away from said magnetoresistance element, and is exposed along said head surface and connected to a ground voltage.
Claim 5
Dependent Claim
98 words
A magnetoresistance effect type thin film head comprising: a magnetoresistance effect element provided in which the longitudinal direction of said magnetoresistance effect element is vertical to a head surface facing and adapted to cooperate with a disc surface, two electrodes substantially arranged in parallel and respectively formed at a fore end and a rear end of said magnetoresistance effect element, wherein the electrode formed at the fore end extends along said surface away from said magnetoresistance element, and is exposed along said head surface and connected to the same ground voltage as said disc surface is connected to.
Claim 6
Dependent Claim
98 words
A magnetoresistance effect type thin film head comprising: a magnetoresistance effect element provided in which the longitudinal direction of said magnetoresistance effect element is vertical to a head surface facing and adapted to cooperate with a disc surface, two electrodes substantially arranged in parallel and respectively formed at a fore end and a rear end of said magnetoresistance effect element, wherein the electrode formed at the fore end extends along said surface away from said magnetoresistance element, and is exposed along said head surface and connected to the same ground voltage as said disc surface is connected to.
Claim 7
Dependent Claim
119 words
A magnetoresistance effect type thin film head having a surface for cooperating with a magnetic medium comprising: a magnetoresistance effect element provided in which the longitudinal direction of said magnetoresistance effect element is vertical to the head surface facing and adapted to cooperate with the surface of a disc in a disc rotating system, two electrodes substantially arranged in parallel and respectively formed at a fore end and a rear end of said magnetoresistance effect element, wherein the electrode formed at the fore end extends along said head surface away from said magnetoresistance element, and is exposed along said head surface and connected to a ground voltage which is common to a ground voltage of said disc rotating system.
Claim 8
Dependent Claim
119 words
A magnetoresistance effect type thin film head having a surface for cooperating with a magnetic medium comprising: a magnetoresistance effect element provided in which the longitudinal direction of said magnetoresistance effect element is vertical to the head surface facing and adapted to cooperate with the surface of a disc in a disc rotating system, two electrodes substantially arranged in parallel and respectively formed at a fore end and a rear end of said magnetoresistance effect element, wherein the electrode formed at the fore end extends along said head surface away from said magnetoresistance element, and is exposed along said head surface and connected to a ground voltage which is common to a ground voltage of said disc rotating system.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-06-12 | 1998-12-12 | 1999-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-06-12 | 2002-12-12 | 2003-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-06-12 | 2006-12-12 | 2007-06-13 | $7700.00 | Window Closed / Lapsed |