Patent US4581291A successfully refreshed from Google Patents.
US4581291A
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Microminiature coaxial cable and methods manufacture
Assignee: University of California Berkeley
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Filing: 1983-12-29
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Granted: 1986-04-08
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Expires: 2003-12-29
Abstract
Abstract A coaxial cable is provided having a ribbon inner conductor surrounded by a dielectric and a circumferential conductor. The coaxial cable may be microminiature comprising a very thin ribbon strip conductor from between 5 to 15 μm thick and from 150 to 200 μm wide, having a surrounding foamed dielectric or parylene applied thereon by a vapor plasma process and an outer conductor of an adhering high conductivity metal vacuum deposited on the dielectric. Alternately the foam dielectric embodiment may have a contiguous parylene coating applied adjacent the inner conductor or the outer conductor or both. Also, the cable may be fabricated by forming a thin ribbon of strip conductive material into an inner conductor, applying thereabout a dielectric by spraying on a solution of polystyrene and polyethylene and then vacuum depositing and adhering high conductivity metal about the dielectric. The cable strength may be increased by adding glass microfilament fibers or glass microballoons to the solution of polystyrene and polyethylene. Further, the outer conductive layer may be applied by electroless deposition in an aqueous solution rather than by vacuum deposition. A thin coating of parylene is preferably applied to the outer conductor to prevent its oxidation and inhibit mechanical abrasion.
Inventors
- 👤 Wayne L. Bongianni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:51
CPC Classifications
H; H01; H01B; H01B11/00; H01B11/18; H01B11/1808; H01B11/1817; H01B11/1834; H01B11/1839; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294; Y10T428/2942; Y10T428/2944; Y10T428/2947; Y10T428/2949; Y10T428/2958
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
67 words
A method of constructing microminiature coaxial cable comprising: (a) preparing a strip conductor into a very thin ribbon from between 5 to 15 μm thick and from 150 to 200 μm wide; (b) applying a foamed dielectric comprising low-loss plastic about the strip conductor; (c) applying parylene by a vapor plasma process; and (d) applying an outer conductor by vacuum deposition of an adhering high conductivity metal.
Claim 2
Independent Claim
67 words
A method of constructing microminiature coaxial cable comprising: (a) preparing a strip conductor into a very thin ribbon from between 5 to 15 μm thick and from 150 to 200 μm wide; (b) applying a foamed dielectric comprising low-loss plastic about the strip conductor; (c) applying parylene by a vapor plasma process; and (d) applying an outer conductor by vacuum deposition of an adhering high conductivity metal.
Claim 3
Dependent Claim
33 words
The method of claim 1 wherein the strip conductor is made of a drawn copper wire of circular cross section by rolling the wire between rollers until a very thin ribbon is obtained.
Claim 4
Dependent Claim
13 words
The invention of claim 1 wherein aluminum is the adhering high conductivity metal.
Claim 5
Dependent Claim
13 words
The invention of claim 1 wherein during vapor deposition the cable is rotated.
Claim 6
Dependent Claim
34 words
The invention of claim 1 further comprising applying a thin coating of parylene to the outside surface of the cable to hold the outer conductor in place and prevent oxidation and mechanical abrasion thereof.
Claim 7
Independent Claim
53 words
A method for manufacturing a microminiature coaxial cable comprising: (a) forming a thin ribbon of strip conductive material into an inner conductor; (b) applying a dielectric about the inner conductor by spraying a solution of polystyrene and polyethylene about the center conductor; and (c) applying an adhering high conductivity metal about the dielectric.
Claim 8
Independent Claim
53 words
A method for manufacturing a microminiature coaxial cable comprising: (a) forming a thin ribbon of strip conductive material into an inner conductor; (b) applying a dielectric about the inner conductor by spraying a solution of polystyrene and polyethylene about the center conductor; and (c) applying an adhering high conductivity metal about the dielectric.
Claim 9
Dependent Claim
28 words
The invention of claim 6 further comprising adding glass microfilament fibers or glass microballoons to the solution of polystyrene and polyethylene to increase the strength of the cable.
Claim 10
Dependent Claim
20 words
The invention of claim 6 wherein said high conductivity metal is applied by electroless deposition thereof in an aqueous solution.
Claim 11
Dependent Claim
29 words
The invention of claim 6 further comprising applying a thin coating of parylene to the outside of the outer conductor to prevent its oxidation and inhibit mechanical abrasion thereof.
Claim 12
Dependent Claim
47 words
A microminiature coaxial cable comprising: a thin ribbon inner conductor; a dielectric coaxial with and surrounding said thin inner conductor; a thin outer conductor coaxial with and surrounding said dielectric; and a protective coating surrounding said outer conductor wherein said protective coating is a parylene protective coating.
Claim 13
Dependent Claim
47 words
A microminiature coaxial cable comprising: a thin ribbon inner conductor; a dielectric coaxial with and surrounding said thin inner conductor; a thin outer conductor coaxial with and surrounding said dielectric; and a protective coating surrounding said outer conductor wherein said protective coating is a parylene protective coating.
Claim 14
Independent Claim
69 words
A method of constructing coaxial cable comprising: (a) preparing a strip conductor into a thin ribbon; (b) applying a dielectric comprising low-loss plastic coaxially distributed about said thin ribbon; (c) applying an outer conductor coaxial with and surrounding said dielectric; and (d) applying a thin coating of parylene to the outside surface of the cable to hold the outer conductor in place and prevent oxidation and mechanical abrasion thereof.
Claim 15
Independent Claim
69 words
A method of constructing coaxial cable comprising: (a) preparing a strip conductor into a thin ribbon; (b) applying a dielectric comprising low-loss plastic coaxially distributed about said thin ribbon; (c) applying an outer conductor coaxial with and surrounding said dielectric; and (d) applying a thin coating of parylene to the outside surface of the cable to hold the outer conductor in place and prevent oxidation and mechanical abrasion thereof.
Claim 16
Independent Claim
61 words
A method for manufacturing a coaxial cable comprising: (a) forming a thin ribbon of strip conductive material into an inner conductor; (b) applying a dielectric coaxially distributed about the inner conductor by spraying a solution of polystyrene and polyethylene about the inner conductor; and (c) depositing an adhering high conductivity metal about the dielectric such that said metal surrounds said dielectric.
Claim 17
Independent Claim
61 words
A method for manufacturing a coaxial cable comprising: (a) forming a thin ribbon of strip conductive material into an inner conductor; (b) applying a dielectric coaxially distributed about the inner conductor by spraying a solution of polystyrene and polyethylene about the inner conductor; and (c) depositing an adhering high conductivity metal about the dielectric such that said metal surrounds said dielectric.
Claim 18
Dependent Claim
28 words
The invention of claim 12 further comprising adding glass microfilament fibers or glass microballoons to the solution of polystyrene and polyethylene to increase the strength of the cable.
Claim 19
Dependent Claim
20 words
The invention of claim 12 wherein said high conductivity metal is applied by electroless deposition thereof in an aqueous solution.
Claim 20
Dependent Claim
29 words
The invention of claim 12 further comprising applying a thin coating of parylene to the outside of the outer conductor to prevent its oxidation and inhibit mechanical abrasion thereof.
Claim 21
Dependent Claim
40 words
A coaxial cable comprising: a thin ribbon inner conductor; a dielectric surrounding said thin inner conductor; a thin outer conductor surrounding said dielectric; and a protective coating surrounding said outer conductor wherein said protective coating is a parylene protective coating.
Claim 22
Dependent Claim
40 words
A coaxial cable comprising: a thin ribbon inner conductor; a dielectric surrounding said thin inner conductor; a thin outer conductor surrounding said dielectric; and a protective coating surrounding said outer conductor wherein said protective coating is a parylene protective coating.
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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) | 1989-04-07 | 1989-10-07 | 1990-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-07 | 1993-10-07 | 1994-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-07 | 1997-10-07 | 1998-04-08 | $7700.00 | Window Closed / Lapsed |