US5140484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetoresistive head having electrodes with a predetermined length and positioned to form a predetermined angle with the head surface
Assignee: TDK Corp
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Filing: 1991-03-26
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Granted: 1992-08-18
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Expires: 2011-03-26
Abstract
Abstract A magnetoresistive playback head for a small magnetic disk. Electrodes connected to an MR element each has a linear portion extending over a length which is more than ten times greater than the width of the MR element. The electrodes each extends from the MR element at an angle less than 14 degrees. This allows only a single magnetic domain to exist in the MR element and frees the magneto-resistive response from distortions or hysteresis. As a result, signals reproduced from a magnetic recording medium do not include any distortion or noise.
Inventors
- 👤 Takao Maruyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:19
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/33; G11B5/39; G11B5/3903
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
107 words
A magnetoresistive (MR) head having a surface that faces a magnetic recording medium, said head comprising: an MR element and electrodes formed integrally with said MR element, said electrodes each having a linear portion of predetermined length which is connected to and extends from said MR element, wherein one surface on each linear portion forms a predetermined angle with said head surface, said angle being greater than zero and less than 14 degrees, said MR element having a width in a direction perpendicular to said head surface, wherein said length of said linear portion is more than ten times greater than the width of said MR element.
Claim 2
Dependent Claim
107 words
A magnetoresistive (MR) head having a surface that faces a magnetic recording medium, said head comprising: an MR element and electrodes formed integrally with said MR element, said electrodes each having a linear portion of predetermined length which is connected to and extends from said MR element, wherein one surface on each linear portion forms a predetermined angle with said head surface, said angle being greater than zero and less than 14 degrees, said MR element having a width in a direction perpendicular to said head surface, wherein said length of said linear portion is more than ten times greater than the width of said MR element.
Claim 3
Dependent Claim
47 words
A head as claimed in claim 1, wherein a pair of magnetic shields are located at opposite sides of said MR element and part of said linear portions of said electrodes, one of said magnetic shields underlying said MR element and said electrodes having a flat configuration.
References Cited (Backward Citations)
US4843506A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-08-18 | 1996-02-17 | 1996-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-08-18 | 2000-02-17 | 2000-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-08-18 | 2004-02-17 | 2004-08-18 | $7700.00 | Window Closed / Lapsed |