US5208716A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetoresistant magnetic head for longitudinal recording and process for producing such a head
Assignee: Commissariat à l'Énergie Atomique et Aux Énergies Alternatives
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Filing: 1990-03-28
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Granted: 1993-05-04
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Expires: 2010-03-28
Abstract
Abstract Magnetoresistant magnetic reading head and process for producing the same. The head comprises a magnetoresistant strip beneath a magnetic spacer. This strip is obtained by etching using the spacer partly as a mask. Therefore, the magnetoresistant element is self-aligned with respect to the spacer and is buried beneath it. Such a device finds particular application in magnetic recording and reading.
Inventors
- 👤 Jean-Pierre Lazzari
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:46
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/33; G11B5/39; G11B5/3903; G11B5/3967
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
129 words
A magnetic reading head comprising: a horizontal lower magnetic layer; a horizontal upper magnetic layer interrupted by a gap filled with a non-magnetic spacer, said spacer having a predetermined length (L) and thickness; two magnetic vertical connectors connecting said lower and upper magnetic layer; a H-shaped magnetoresistant element with two large strips and a ribbon linking said two large strips, said ribbon being placed beneath said spacer and having a predetermined length (l) less than said predetermined length (L) of said spacer and a predetermined thickness equal to said predetermined thickness of said spacer; and two reading terminals connected to contacts made on said two large strips wherein said head being adapted to read a track written over a width 1 less than the width L of the track.
Claim 2
Dependent Claim
129 words
A magnetic reading head comprising: a horizontal lower magnetic layer; a horizontal upper magnetic layer interrupted by a gap filled with a non-magnetic spacer, said spacer having a predetermined length (L) and thickness; two magnetic vertical connectors connecting said lower and upper magnetic layer; a H-shaped magnetoresistant element with two large strips and a ribbon linking said two large strips, said ribbon being placed beneath said spacer and having a predetermined length (l) less than said predetermined length (L) of said spacer and a predetermined thickness equal to said predetermined thickness of said spacer; and two reading terminals connected to contacts made on said two large strips wherein said head being adapted to read a track written over a width 1 less than the width L of the track.
Claim 3
Dependent Claim
24 words
Magnetic head according to claim 1, further comprising a conductor coil surrounding said two magnetic connectors and being joined to the two writing terminals.
Claim 4
Dependent Claim
29 words
Magnetic head according to claim 2, wherein one of said two writing terminals connected to said coil coincides with one of said two reading terminals connected to magnetoresistant ribbon.
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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) | 1996-05-03 | 1996-11-02 | 1997-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-03 | 2000-11-02 | 2001-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-03 | 2004-11-02 | 2005-05-04 | $7700.00 | Window Closed / Lapsed |