US4333229A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing thin film magnetic head/slider combination
Assignee: Memorex Corp
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Filing: 1980-07-21
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Granted: 1982-06-08
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Expires: 2000-07-21
Abstract
Abstract A method of manufacturing thin-film magnetic transducers in which the transducers are deposited onto a substrate member adjacent a finished and lapped surface in a manner such that no further lapping of the slider rail adjacent the transducer is required during manufacture. The method includes forming recesses on the substrate member to define slider rails and then forming air bearing surfaces on each such rail.
Inventors
- 👤 Michael L. Ellenberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:30
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/58; G11B5/60; G11B5/6005; G11B5/127; G11B5/31; G11B5/3163; G11B5/3166; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49021; Y10T29/49032; Y10T29/49036; Y10T29/49041; Y10T29/49043; Y10T29/49044
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
244 words
A method of manufacturing a thin film magnetic recording and playback head/slider combination having an air bearing structure, comprising the steps of on an extended member of substrate material, forming at least two intersecting elongated surfaces, a first said surface being flat, and a second said surface being flat and defined as the rear surface of said head/slider combination; depositing a plurality of side-by-side thin film transducers onto said member rear surface and positioned relative to said first surface in the predetermined relationship desired for the finished head/slider combination; forming recesses in said first surface between said transducers, the recesses so formed intersecting both said rear surface and a third surface of said member defined as the front surface thereof, whereby are formed a plurality of rails extending between the member front and rear surfaces and including said first surfaces, at least some of which rails have a transducer at the rear end thereof; and forming on each said rail an air bearing surface and taper extending longitudinally of said rail between said first surface and said forward surface, said air bearing surface intersecting said first surface and being inclined away from said first surface and being formed by abrading said rail at an angle to said first surface until said intersection of said air bearing surface and said first surface is a predetermined distance from said member rear surface, and said taper extending from said air bearing surface to said member forward surface.
Claim 2
Independent Claim
244 words
A method of manufacturing a thin film magnetic recording and playback head/slider combination having an air bearing structure, comprising the steps of on an extended member of substrate material, forming at least two intersecting elongated surfaces, a first said surface being flat, and a second said surface being flat and defined as the rear surface of said head/slider combination; depositing a plurality of side-by-side thin film transducers onto said member rear surface and positioned relative to said first surface in the predetermined relationship desired for the finished head/slider combination; forming recesses in said first surface between said transducers, the recesses so formed intersecting both said rear surface and a third surface of said member defined as the front surface thereof, whereby are formed a plurality of rails extending between the member front and rear surfaces and including said first surfaces, at least some of which rails have a transducer at the rear end thereof; and forming on each said rail an air bearing surface and taper extending longitudinally of said rail between said first surface and said forward surface, said air bearing surface intersecting said first surface and being inclined away from said first surface and being formed by abrading said rail at an angle to said first surface until said intersection of said air bearing surface and said first surface is a predetermined distance from said member rear surface, and said taper extending from said air bearing surface to said member forward surface.
Claim 3
Dependent Claim
72 words
The method of claim 1 wherein said substrate material is in the form of a flat wafer with one of the flat surfaces thereof being said second surface and having a plurality of parallel, spaced-apart slots formed therein to define a plurality of said first surfaces, and said method further comprises severing said wafer within said slots to form a plurality of said extended members prior to said depositing of said transducers.
Claim 4
Dependent Claim
31 words
The method of claim 1 further comprising dividing said member into a plurality of head/slider units by severing said member in a direction parallel to said rails between preselected said rails.
Claim 5
Dependent Claim
23 words
The method of claim 3 wherein said member is divided into a plurality of head/slider units each having at least two said rails.
Claim 6
Dependent Claim
32 words
The method of claim 4 wherein said member is divided such that each said head/slider unit has two said rails and each said rail has a transducer on the rear surface thereof.
Claim 7
Dependent Claim
20 words
The method of claim 3 wherein said member is so severed prior to said formation of said air bearing surfaces.
Claim 8
Dependent Claim
19 words
The method of claim 3 wherein said member is so severed after said formation of said air bearing surfaces.
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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) | 1985-06-07 | 1985-12-07 | 1986-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-07 | 1989-12-07 | 1990-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-07 | 1993-12-07 | 1994-06-08 | $7700.00 | Window Closed / Lapsed |