US4152679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microminiature electrical delay line utilizing thin film inductor array with magnetic enhancement and coupling
Assignee: Hull Corp
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Filing: 1977-11-14
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Granted: 1979-05-01
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Expires: 1997-11-14
Abstract
Abstract A microminiature electrical delay line utilizes an m-derived filter formed by depositing a film of permalloy or other high permeability metal on a quartz or other dielectric substrate, then depositing a layer of quartz or other dielectric over the permalloy film, after which a plurality of microminiature thin film inductance coils are deposited on the dielectric layer and joined together electrically in series, a top layer of quartz or other dielectric then is deposited over the interconnected coils and a strip of permalloy or other high permeability metal is deposited over the top dielectric layer to extend across the coils, a gap being provided in the strip of permalloy at the central axis of each coil.
Inventors
- 👤 Stephen T. C. Chen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:46
CPC Classifications
H; H01; H01F; H01F17/00; H01F17/0006; H03; H03H; H03H7/00; H03H7/30; H03H7/32; H05; H05K; H05K1/00; H05K1/16; H05K1/165
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
124 words
A microminiature electrical delay line, comprising the solid, one-piece, integrated assembly of: (a) a first film of high permeability metal, (b) a first film of dielectric material overlying and bonded to the first film of high permeability metal, (c) a plurality of series-connected microminiature inductance coils overlying and bonded to the first film of dielectric material, (d) a second film of dielectric material overlying and bonded to the inductance coils, and (e) a second film of high permeability metal in the form of a narrow strip overlying and bonded to the second film of dielectric material and extending along the center line of the series-connected coils, the second film being interrupted at each coil to form a gap at the axis of ech coil.
Claim 2
Dependent Claim
124 words
A microminiature electrical delay line, comprising the solid, one-piece, integrated assembly of: (a) a first film of high permeability metal, (b) a first film of dielectric material overlying and bonded to the first film of high permeability metal, (c) a plurality of series-connected microminiature inductance coils overlying and bonded to the first film of dielectric material, (d) a second film of dielectric material overlying and bonded to the inductance coils, and (e) a second film of high permeability metal in the form of a narrow strip overlying and bonded to the second film of dielectric material and extending along the center line of the series-connected coils, the second film being interrupted at each coil to form a gap at the axis of ech coil.
Claim 3
Dependent Claim
23 words
The delay line of claim 1 including a substrate of dielectric material underlying and bonded to the first film of high permeability metal.
Claim 4
Dependent Claim
56 words
The delay line of claim 1 wherein the coils are spaced apart in a line, each coil has a central axis extending perpendicular to the plane of the substrate and has opposite end terminals extending in opposite directions from the coil on said line, and electrically conductive metal interconnects the confronting end terminals of adjacent coils.
Claim 5
Dependent Claim
28 words
The delay line of claim 2 wherein the substrate is quartz, the films of high permeability metal are permalloy and the films of dielectric material are silicon oxide.
References Cited (Backward Citations)
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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) | 1982-04-30 | 1982-10-30 | 1983-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-30 | 1986-10-30 | 1987-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-30 | 1990-10-30 | 1991-05-01 | $7700.00 | Window Closed / Lapsed |