US4001890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double chip flying head
Assignee: Bull HN Information Systems Inc
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Filing: 1974-08-05
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Granted: 1977-01-04
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Expires: 1994-08-05
Abstract
Abstract A plurality of thin-film transducer chips are mounted on a flying head. The head is mounted adjacent a magnetic storage medium having a plurality of closely spaced tracks. Each of the transducer chips has a transducer adjacent a corresponding one of each of the tracks of the storage medium so that a plurality of transducers may be used for reading or writing on each of the tracks. A specially designed write transducer may be used to write on each track and another specially designed read transducer may be used to read from each track.
Inventors
- 👤 Wolfgang W. O. G. Kayser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:24
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/33; G11B5/39; G11B5/3903; G11B5/3967; G11B5/48; G11B5/488
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
202 words
A multitrack magnetic read/write head for use with a movable magnetic recording medium having a plurality of tracks, said head having a plurality of transducers for each of said tracks, said head comprising: a substrate having first and second mutually spaced surfaces normal to the plane of said medium, the distance between said first and said second surfaces being relatively small compared to the length dimension of each of said surfaces in a direction parallel to the plane of said medium; a plurality of first magnetic write poles mounted in spaced relationship in a row on said first surface; a plurality of second magnetic write poles each overlying a corresponding first write pole in paired alignment therewith; a continuous write conductor, successive spaced portions of said write conductor being mounted between said write pole pairs to form successive spaced write transducers; a plurality of write terminals mounted on said continuous conductor between said spaced write transducers; a magnetoresistive film deposited on said second surface of said substrate and extending along the full length dimension thereof opposite said write transducers; and a plurality of read terminals respectively mounted on said magnetoresistive film opposite corresponding spaces between said write transducers to form read transducers.
Claim 2
Dependent Claim
202 words
A multitrack magnetic read/write head for use with a movable magnetic recording medium having a plurality of tracks, said head having a plurality of transducers for each of said tracks, said head comprising: a substrate having first and second mutually spaced surfaces normal to the plane of said medium, the distance between said first and said second surfaces being relatively small compared to the length dimension of each of said surfaces in a direction parallel to the plane of said medium; a plurality of first magnetic write poles mounted in spaced relationship in a row on said first surface; a plurality of second magnetic write poles each overlying a corresponding first write pole in paired alignment therewith; a continuous write conductor, successive spaced portions of said write conductor being mounted between said write pole pairs to form successive spaced write transducers; a plurality of write terminals mounted on said continuous conductor between said spaced write transducers; a magnetoresistive film deposited on said second surface of said substrate and extending along the full length dimension thereof opposite said write transducers; and a plurality of read terminals respectively mounted on said magnetoresistive film opposite corresponding spaces between said write transducers to form read transducers.
Claim 3
Dependent Claim
23 words
The apparatus of claim 1 wherein said substrate consists of a pair of superposed wafers, and a magnetic shield disposed between said wafers.
Claim 4
Dependent Claim
44 words
The apparatus of claim 1 and further including first and second insulating surfaces, said first insulating surface being interposed between said first substrate surface and said first write poles, said second insulating surface being interposed between said second substrate surface and said magnetoresistive film.
Claim 5
Dependent Claim
27 words
The apparatus of claim 3 wherein said continuous write conductor is further disposed in contact with said first insulating surface in the spaces between successive write transducers.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-01-04 | 1980-07-05 | 1981-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-04 | 1984-07-05 | 1985-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-04 | 1988-07-05 | 1989-01-04 | $7700.00 | Window Closed / Lapsed |