US4707671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical transmission line
Assignee: Junkosha Co Ltd
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Filing: 1986-05-09
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Granted: 1987-11-17
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Expires: 2006-05-09
Abstract
Abstract An electrical transmission unit line is provided comprising a porous dielectric layer having positioned on one side thereof a pair of narrow, parallel elongated electrical conductors and on the other side thereof, opposite the pair of conductors and extending transversely across both wires of the pair and parallel thereto, a wide ground conductor. An electrical transmission line having a plurality of such unit lines is also provided. The porous dielectric is preferably porous, expanded polytetrafluoroethylene. The transmission lines are covered with an electrically insulating material, preferably a nonporous plastic.
Inventors
- 👤 Hirosuke Suzuki
- 👤 Tetsuro Umebayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:36
CPC Classifications
H; H01; H01P; H01P3/00; H01P3/02; H01P3/08; H01P3/088; H01B; H01B7/00; H01B7/08; H01B7/0838; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0313; H05K3/00; H05K3/22; H05K3/28; H05K1/0213; H05K1/0216; H05K1/0218; H05K1/0219; H05K1/0237; H05K1/024; H05K2201/00; H05K2201/01; H05K2201/0104; H05K2201/0116; H05K2201/0137; H05K2201/015; H05K2201/0183; H05K2201/0195; H05K2201/09; H05K2201/09209; H05K2201/09218; H05K2201/09236
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
81 words
A high conductor density electrical transmission line comprising a porous dielectric layer having positioned on one side thereof at least one pair of narrow, parallel elongated electrical conductors spaced apart from each other and on the other side of said layer, opposite said pair of conductors and extending transversely across but not beyond both conductors of said pair and arranged parallel to said pair, at least one wide ground conductor, this assembly being covered with a solid, electrically insulating resin layer.
Claim 2
Dependent Claim
81 words
A high conductor density electrical transmission line comprising a porous dielectric layer having positioned on one side thereof at least one pair of narrow, parallel elongated electrical conductors spaced apart from each other and on the other side of said layer, opposite said pair of conductors and extending transversely across but not beyond both conductors of said pair and arranged parallel to said pair, at least one wide ground conductor, this assembly being covered with a solid, electrically insulating resin layer.
Claim 3
Dependent Claim
43 words
The transmission line of claim 1 comprising a plurality of said pairs of conductors positioned on one side of said porous layer, each pair having at least one wide ground conductor positioned opposite said pair on the other side of said dielectric layer.
Claim 4
Dependent Claim
36 words
The transmission line of claim 1 having a second dielectric layer separating said pair of conductors from a second wide ground conductor opposite said pair of conductors and extending transversely across both conductors of said pair.
Claim 5
Dependent Claim
26 words
The transmission line of claim 1 wherein said wide ground conductor comprises a plurality of narrow conductors disposed parallel to and in contact with each other.
Claim 6
Dependent Claim
20 words
The transmission line of claim 1 having a separation layer positioned between said pair of conductors and said porous dielectric.
Claim 7
Dependent Claim
19 words
The transmission line of claim 1 having a separation layer positioned between said ground conductor and said porous dielectric.
Claim 8
Dependent Claim
28 words
The transmission line of claim 1 having at least one additional layer of a porous dielectric positioned between said signal conductors and said solid, electrically insulating resin layer.
Claim 9
Dependent Claim
28 words
The transmission line of claim 1 having at least one additional layer of a porous dielectric positioned between said ground conductor and said solid, electrically insulating resin layer.
Claim 10
Dependent Claim
30 words
A plurality of the transmission lines of claim 1 disposed in parallel relationship and being connected together at at least a longitudinal portion thereof, thereby forming a flat-cable-shaped transmission line.
Claim 11
Dependent Claim
34 words
The transmission line of claim 2 wherein all said pairs of conductors are positioned on one side of said dielectric and all said ground conductors are positioned on the other side of said dielectric.
Claim 12
Dependent Claim
25 words
The transmission line of claim 2 wherein said pairs of conductors and said ground conductors are alternately disposed on both sides of said dielectric layer.
Claim 13
Dependent Claim
32 words
The transmission line of claim 2 wherein a portion of said porous dielectric layer between adjacent sets of conductor pairs and ground conductor is compressed to increase the density of said portion.
Claim 14
Dependent Claim
19 words
The transmission line of claim 2 wherein a solid film is disposed between said porous dielectric and said conductors.
Claim 15
Dependent Claim
23 words
The transmission line of claim 2 wherein a solid film is interleaved alternately through said conductors in the transverse direction across said line.
Claim 16
Dependent Claim
21 words
The transmission line of claim 1 wherein an antistatic layer is provided on the outer surface of said covering resin layer.
Claim 17
Dependent Claim
12 words
The transmission line of claim 1 provided with an outer shielding layer.
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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) | 1990-11-16 | 1991-05-18 | 1991-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-16 | 1995-05-18 | 1995-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-16 | 1999-05-18 | 1999-11-17 | $7700.00 | Window Closed / Lapsed |