US4616279A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical connections for thin film transducer heads
Assignee: HP Inc
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Filing: 1983-05-19
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Granted: 1986-10-07
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Expires: 2003-05-19
Abstract
Abstract Electrical connections between the read/write elements on the magnetic transducer head and the circuitry associated therewith (usually an amplifier/driver integrated circuit chip) are provided by means of fine, flat conductive wires encapsulated in a plastic film. At points where the wires need to make substantial angular turns, portions of the plastic film are removed so as to permit such turns to be accomplished without unacceptably increasing the stiffness of the connections which would adversely affect the aerodynamic properties of the transducer head as it "flies" over a spinning magnetic recording disc.
Inventors
- 👤 Paul W. Poorman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:34
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/4806; G11B5/4853; G11B5/10; G11B5/105; G11B5/58; G11B5/60; G11B5/6005
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
145 words
In a magnetic transducer mechanism having a write/read transducer member carried by a flexure support member, and electrical connection means comprising a plurality of electrical conductors encapsulated in an electrically insulating film, said electrical connection means extending along the length of said flexure support member, said electrical connection means for providing electrical connections to said write/read transducer member, an improvement comprising: said electrical connection means having predetermined portions of said electrically insulating film removed from said plurality of electrical conductors such that said electrical connection means is encapsulated in said film along straight portions of said conductors and devoid of said film along bent portions thereof, whereby said plurality of conductors turn in a predetermined angle to permit greater flexibility and substantially eliminate bias effects resulting from an increase in stiffness of said electrical connection means when said conductors encapsulated in said film are bent.
Claim 2
Dependent Claim
145 words
In a magnetic transducer mechanism having a write/read transducer member carried by a flexure support member, and electrical connection means comprising a plurality of electrical conductors encapsulated in an electrically insulating film, said electrical connection means extending along the length of said flexure support member, said electrical connection means for providing electrical connections to said write/read transducer member, an improvement comprising: said electrical connection means having predetermined portions of said electrically insulating film removed from said plurality of electrical conductors such that said electrical connection means is encapsulated in said film along straight portions of said conductors and devoid of said film along bent portions thereof, whereby said plurality of conductors turn in a predetermined angle to permit greater flexibility and substantially eliminate bias effects resulting from an increase in stiffness of said electrical connection means when said conductors encapsulated in said film are bent.
Claim 3
Dependent Claim
39 words
The invention as in claim 1 wherein a bent portion of said plurality of electrical conductors devoid of said film between said flexure support member and said write/read transducer member forms at least one turn of a predetermined angle.
Claim 4
Dependent Claim
65 words
The invention as in claim 2 wherein at least one narrow strip of said electrically insulating film remains in situ along said bent portions where said plurality of electrical conductors turn to maintain each of said plurality of electrical conductors in spaced-apart relationship with each of the other said plurality of electrical conductors and to provide electrical isolation of each of said plurality of conductors.
Claim 5
Dependent Claim
31 words
The invention as in claim 3 wherein a bent portion of said plurality of electrical conductors between said flexure support member and said write/read transducer member forms a 180 degree turn.
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) | 1989-10-06 | 1990-04-07 | 1990-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-06 | 1994-04-07 | 1994-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-06 | 1998-04-07 | 1998-10-07 | $7700.00 | Window Closed / Lapsed |