US4435900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing a magnetic head unit
Assignee: US Philips Corp
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Filing: 1982-06-25
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Granted: 1984-03-13
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Expires: 2002-06-25
Abstract
Abstract A method of manufacturing an integrated magnetic head unit includes providing a substrate which supports a plurality of electromagnetic transducing elements connected to bonding pads. The transducing elements are then covered by a silicon plate which is arranged in good thermally-conducting relationship with the transducing elements and with a housing.
Inventors
- 👤 Johannes de Wilde
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:25
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/31; G11B5/3103; G11B5/3163; G11B5/40; H; H10; H10W; H10W72/00; H10W72/50; H10W72/531; H10W72/536; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49021; Y10T29/49032; Y10T29/49036; Y10T29/49043; Y10T29/49044
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
124 words
A method of manufacturing a magnetic head unit having a plurality of transducing elements arranged in a housing, comprising: providing a substrate having a plurality of transducing elements and associated bonding pads arranged in a row; covering the transducing elements with a silicon cover plate having a surface facing the transducing elements and also having a groove arranged through the surface so that the groove is disposed above the bonding pads, and further arranging the cover plate to be in a good thermally-conducting relationship with the transducing elements; removing material above the groove in the cover plate to expose the bonding pads; and arranging the resulting assembly in a housing such that the cover plate is in a good thermally-conducting relationship with the housing.
Claim 2
Independent Claim
124 words
A method of manufacturing a magnetic head unit having a plurality of transducing elements arranged in a housing, comprising: providing a substrate having a plurality of transducing elements and associated bonding pads arranged in a row; covering the transducing elements with a silicon cover plate having a surface facing the transducing elements and also having a groove arranged through the surface so that the groove is disposed above the bonding pads, and further arranging the cover plate to be in a good thermally-conducting relationship with the transducing elements; removing material above the groove in the cover plate to expose the bonding pads; and arranging the resulting assembly in a housing such that the cover plate is in a good thermally-conducting relationship with the housing.
Claim 3
Dependent Claim
37 words
A method as claimed in claim 1, comprising in addition the step of selecting the cover plate to have a size such that said covering step leaves at least one end transducing element of the row uncovered.
Claim 4
Independent Claim
152 words
A method of manufacturing a plurality of magnetic head units, each unit having a plurality of transducing elements arranged in a housing, comprising: providing a substrate having a multiplicity of transducing elements and associated bonding pads arranged in parallel rows, each row having a plurality of the elements and pads; covering the transducing elements with a silicon cover plate having a surface facing the transducing elements and also having a pattern of parallel grooves arranged through the surface so that the grooves are disposed above the bonding pads, and further arranging the cover plate to be in a good thermally-conducting relationship with the transducing elements; removing material above the grooves in the cover plate to expose the bonding pads; severing the resultant assembly into a plurality of strip-shaped magnetic head subsassemblies; and arranging each subassembly in a housing such that the cover plate is in a good thermally-conducting relationship with the housing.
Claim 5
Independent Claim
152 words
A method of manufacturing a plurality of magnetic head units, each unit having a plurality of transducing elements arranged in a housing, comprising: providing a substrate having a multiplicity of transducing elements and associated bonding pads arranged in parallel rows, each row having a plurality of the elements and pads; covering the transducing elements with a silicon cover plate having a surface facing the transducing elements and also having a pattern of parallel grooves arranged through the surface so that the grooves are disposed above the bonding pads, and further arranging the cover plate to be in a good thermally-conducting relationship with the transducing elements; removing material above the grooves in the cover plate to expose the bonding pads; severing the resultant assembly into a plurality of strip-shaped magnetic head subsassemblies; and arranging each subassembly in a housing such that the cover plate is in a good thermally-conducting relationship with the housing.
Claim 6
Dependent Claim
37 words
A method as claimed in claim 3, comprising in addition the step of selecting the cover plate to have a size such that said covering step leaves at least one end transducing element of each row uncovered.
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) | 1987-03-13 | 1987-09-12 | 1988-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-13 | 1991-09-12 | 1992-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-13 | 1995-09-12 | 1996-03-13 | $7700.00 | Window Closed / Lapsed |