US5237476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thin film tape head assembly
Assignee: Western Digital Technologies Inc
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Filing: 1991-05-28
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Granted: 1993-08-17
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Expires: 2011-05-28
Abstract
Abstract A thin film tape head assembly is formed by depositing a multiplicity of thin film transducers on a ceramic wafer or substrate. The wafer is divided into head bars, each of which has one or more thin film transducers on its face. End sections and a cover bar are joined to the head bar to form a head bar subassembly. A flexible cable or electrical pins are provided between the end sections to enable electrical connection between the head circuit and external circuitry. By joining a number of head bar subassemblies, a multigap thin film tape head assembly is produced to serve as a read/write device.
Inventors
- 👤 Peter G. Bischoff
- 👤 Carroll S. Gooden
- 👤 Chak M. Leung
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:30
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/31; G11B5/3103
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
132 words
A thin film tape head assembly comprising: a head bar having opposing ends and a top surface between said ends and having at least one thin film head formed on the face of said head bar, said thin film head having a transducing gap disposed at the top surface of said head bar; a plurality of end caps joined to said opposing ends of said head bar for supporting said head bar for forming a head bar subassembly including a cover bar attached to the face of said head bar for covering the face of said head bar and said thin film head, including longitudinal grooves formed in said end caps, and rectangular surface blocks seated in said grooves, said head bar and said cover bar being joined to said surface blocks.
Claim 2
Dependent Claim
132 words
A thin film tape head assembly comprising: a head bar having opposing ends and a top surface between said ends and having at least one thin film head formed on the face of said head bar, said thin film head having a transducing gap disposed at the top surface of said head bar; a plurality of end caps joined to said opposing ends of said head bar for supporting said head bar for forming a head bar subassembly including a cover bar attached to the face of said head bar for covering the face of said head bar and said thin film head, including longitudinal grooves formed in said end caps, and rectangular surface blocks seated in said grooves, said head bar and said cover bar being joined to said surface blocks.
Claim 3
Dependent Claim
19 words
A thin film tape head assembly as in claim 1, including a connecting plate disposed between said end caps.
Claim 4
Dependent Claim
35 words
A thin film tape head assembly as in claim 1, including bond pads formed with said head bar subassembly, and a flexible electrical cable or pins connected to said bond pads for accessing external circuitry.
Claim 5
Dependent Claim
24 words
A thin film tape head assembly as in claim 1, wherein said head bar and said end caps are made of a ceramic material.
Claim 6
Dependent Claim
18 words
A thin film tape head assembly as in claim 4, wherein said ceramic material is aluminum oxide-titanium carbide.
Claim 7
Dependent Claim
30 words
A thin film tape head assembly as in claim 1, including bleed slots formed along the top surfaces of said head bar subassembly, said bleed slots surrounding said transducing gap.
Claim 8
Dependent Claim
36 words
A thin film tape head assembly as in claim 1, comprising a multiplicity of joined head bar subassemblies, said joined head bar subassemblies having a lapped and contoured configuration over which a magnetic tape is moved.
Claim 9
Dependent Claim
23 words
A thin film tape head assembly as in claim 1, wherein said head bar subassembly comprises at least one inductive or magnetoresistive head.
Claim 10
Dependent Claim
26 words
A thin film tape head assembly as in claim 1, wherein said end caps are joined to opposing ends of said head bar by an adhesive.
Claim 11
Dependent Claim
19 words
A thin film tape head assembly as in claim 1, including lapping guide means formed on said head bar.
Claim 12
Dependent Claim
28 words
A thin film tape head assembly as in claim 1, including an interconnecting part, wherein said end caps and said interconnecting part are fabricated as an internal structure.
Claim 13
Dependent Claim
22 words
A thin film tape head assembly as in claim 11, wherein said integral structure is made of calcium titanate or nickel zinc.
Claim 14
Dependent Claim
18 words
A thin film tape head assembly as in claim 1, including vernier indicators located on said head bar.
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) | 1996-08-16 | 1997-02-15 | 1997-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-08-16 | 2001-02-15 | 2001-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-08-16 | 2005-02-15 | 2005-08-17 | $7700.00 | Window Closed / Lapsed |