US4320428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multitrack thin-film magnetic head with stacked electric leads
Assignee: US Philips Corp
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Filing: 1980-01-21
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Granted: 1982-03-16
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Expires: 2000-01-21
Abstract
Abstract Elimination of cross talk in an array of integrated magnetic transducing heads by not arranging the electric input and output leads to which the individual transducing elements are connected in one plane but stacking them one on the other with the interposition of an electrically insulating layer.
Inventors
- 👤 Gerardus H. J. Somers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:59
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/31; G11B5/33; G11B5/332
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
149 words
A magnetic transducer head destined to be brought in operation, into a magnetic flux-coupling relationship with a magnetic recording medium which for that purpose is moved past the head, the head comprising a substrate which supports a plurality of magnetic transducer elements of the thin-film type, each element being connected by two spatially separated strip-shaped electric leads to two bonding pads, characterized in that said two leads of each element are generally planar and are stacked one on top of the other over the greater part of their length in generally registered relationship with an electrically insulating layer interposed therebetween, the transducer elements being formed by magnetic circuits, each magnetic circuit being coupled to an electric turn to generate a transducing action between magnetic flux in the circuit and a current in the turn, each turn comprising two ends situated in one plane and connected to the electric leads.
Claim 2
Dependent Claim
149 words
A magnetic transducer head destined to be brought in operation, into a magnetic flux-coupling relationship with a magnetic recording medium which for that purpose is moved past the head, the head comprising a substrate which supports a plurality of magnetic transducer elements of the thin-film type, each element being connected by two spatially separated strip-shaped electric leads to two bonding pads, characterized in that said two leads of each element are generally planar and are stacked one on top of the other over the greater part of their length in generally registered relationship with an electrically insulating layer interposed therebetween, the transducer elements being formed by magnetic circuits, each magnetic circuit being coupled to an electric turn to generate a transducing action between magnetic flux in the circuit and a current in the turn, each turn comprising two ends situated in one plane and connected to the electric leads.
Claim 3
Dependent Claim
85 words
A transducer head as claimed in claim 1, characterized in that the electric turn of a first transducer element together with one of the electric leads is situated in a first conductor layer, while the other electric lead is situated in a second conductor layer, and that the electric turn of a transducer element situated beside the first transducer element together with one of the electric leads is situated in the second conductor layer, the other electric lead being situated in the first conductor layer.
Claim 4
Dependent Claim
131 words
A magnetic transducer head destined to be brought in operation, into a magnetic flux-coupling relationship with a magnetic recording medium which for that purpose is moved past the head, the head comprising a substrate which supports a plurality of magnetic transducer elements of the thin-film type, each element being connected by two spatially separated strip-shaped electric leads to two bonding pads, characterized in that said two leads of each element are generally planar and are stacked one on top of the other over the greater part of their length in generally registered relationship with an electrically insulating layer interposed therebetween, the transducer elements are formed by flux-sensitive elements, each flux-sensitive element on two oppositely located sides having two ends situated in one plane and being connected to the strip-shaped electric leads.
Claim 5
Dependent Claim
131 words
A magnetic transducer head destined to be brought in operation, into a magnetic flux-coupling relationship with a magnetic recording medium which for that purpose is moved past the head, the head comprising a substrate which supports a plurality of magnetic transducer elements of the thin-film type, each element being connected by two spatially separated strip-shaped electric leads to two bonding pads, characterized in that said two leads of each element are generally planar and are stacked one on top of the other over the greater part of their length in generally registered relationship with an electrically insulating layer interposed therebetween, the transducer elements are formed by flux-sensitive elements, each flux-sensitive element on two oppositely located sides having two ends situated in one plane and being connected to the strip-shaped electric leads.
Claim 6
Dependent Claim
87 words
A transducer head as claimed in claim 3, characterized in that the flux-sensitive element of a first transducer element together with one of the electric leads is situated in a first conductor layer, while the other electric lead is situated in a second conductor layer, and that the flux-sensitive element of a transducer element situated beside the first transducer element together with one of the two electric leads is situated in the second conductor layer, while the other electric lead is situated in the first conductor layer.
Claim 7
Dependent Claim
47 words
A transducer head as claimed in claims 1 or 3 characterized in that of every two electric leads stacked one on the other the lead situated further from the substrate is shorter than the lead situated nearer to the substrate and that their bonding pads are aligned.
References Cited (Backward Citations)
US4065797A
Cited
JPS554734A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-03-15 | 1985-09-14 | 1986-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-03-15 | 1989-09-14 | 1990-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-03-15 | 1993-09-14 | 1994-03-16 | $7700.00 | Window Closed / Lapsed |