US5541369A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Printed circuit board having transmission lines with varying thicknesses
Assignee: Nitto Denko Corp
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Filing: 1995-06-05
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Granted: 1996-07-30
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Expires: 2015-06-05
Abstract
Abstract A printed circuit board having juxtaposed thereon in parallel plural conductive paths, at least a part of which has a different length, extending from one end side to the other end side, wherein the electric resistances of the conductive paths are made substantially same by changing the width of at least a part of the conductive paths.
Inventors
- 👤 Hiroshi Tahara
- 👤 Seiju Kobayashi
- 👤 Hitoshi Ohta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:01
CPC Classifications
H; H05; H05K; H05K1/00; H05K1/02; H05K1/0213; H05K1/0263; H05K1/0265; H05K1/0237; H05K1/03; H05K1/0393; H05K1/11; H05K1/118; H05K2201/00; H05K2201/07; H05K2201/0776; H05K2201/0784; H05K2201/09; H05K2201/09209; H05K2201/09654; H05K2201/09727; H05K2201/09736
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
43 words
A printed circuit board, comprising juxtaposed parallel plural conductive paths, at least a part of said paths having different lengths, said paths extending from one end side of said board to another side of said board, wherein said conductive paths have varying thickness.
Claim 2
Dependent Claim
43 words
A printed circuit board, comprising juxtaposed parallel plural conductive paths, at least a part of said paths having different lengths, said paths extending from one end side of said board to another side of said board, wherein said conductive paths have varying thickness.
Claim 3
Dependent Claim
42 words
The printed circuit board of claim 1, wherein said conductive paths have an intermediate long straight line portion between said one end side and said another side of said board and said conductive paths have said varying widths in said intermediate portion.
Claim 4
Dependent Claim
44 words
The printed circuit board of claim 1, wherein said printed circuit board comprises a combination of more than one kind of printed circuit board, and the electric resistance of the conductive paths of each of said printed circuit board is made substantially the same.
Claim 5
Dependent Claim
16 words
The printed circuit board of claim, wherein said conductive paths are formed with a copper foil.
Claim 6
Dependent Claim
16 words
The printed circuit board of claim 4, wherein said copper foil is a rolled copper foil.
Claim 7
Dependent Claim
31 words
The printed circuit board of claim 5, wherein said rolled copper foil is selected from the group consisting of an annealed roller copper foil and a low-temperature annealed rolled copper foil.
Claim 8
Dependent Claim
37 words
The printed circuit board of claim 1, wherein the electric resistances of the whole conductive paths are controlled to substantially the same by changing the widths of the conductive paths in plural conductive paths as every unit.
Claim 9
Dependent Claim
54 words
A cable for transmitting electric signals, comprising a printed circuit board, said printed circuit board comprising juxtaposed parallel plural conductive paths, at least a part of said paths having different lengths, said paths extending from one end side of said board to another side of said board, wherein said conductive paths have varying thickness.
Claim 10
Dependent Claim
54 words
A cable for transmitting electric signals, comprising a printed circuit board, said printed circuit board comprising juxtaposed parallel plural conductive paths, at least a part of said paths having different lengths, said paths extending from one end side of said board to another side of said board, wherein said conductive paths have varying thickness.
Claim 11
Dependent Claim
40 words
The cable of claim 8, wherein said conductive paths have an intermediate long straight line portion between said one end side and said another side of said board and said conductive paths have said varying widths in said intermediate portion.
Claim 12
Dependent Claim
42 words
The cable of claim 8, wherein said printed circuit board comprises a combination of more than one kind of printed circuit board, and the electric resistance of the conductive paths of each of said printed circuit board is made substantially the same.
Claim 13
Dependent Claim
14 words
The cable of 8, wherein said conductive paths are formed with a copper foil.
Claim 14
Dependent Claim
14 words
The cable of 8, wherein said conductive paths are formed with a copper foil.
Claim 15
Dependent Claim
14 words
The cable of claim 11, wherein said copper foil is a rolled copper foil.
Claim 16
Dependent Claim
29 words
The cable of claim 12, wherein said roller copper foil is selected from the group consisting of an annealed rolled copper foil and a low-temperature annealed rolled copper foil.
Claim 17
Dependent Claim
56 words
In a cable for transmitting electric signals, the improvement comprising the use of a printed circuit board comprising juxtaposed parallel plural conductive paths, at least a part of said paths having different lengths, said paths extending from one end side of said board to another side of said board, wherein said conductive paths have varying thickness.
Claim 18
Dependent Claim
56 words
In a cable for transmitting electric signals, the improvement comprising the use of a printed circuit board comprising juxtaposed parallel plural conductive paths, at least a part of said paths having different lengths, said paths extending from one end side of said board to another side of said board, wherein said conductive paths have varying thickness.
References Cited (Backward Citations)
US3093805A
Cited
US3900737A
Cited
JPS5621393A
Cited
US4423467A
Cited
US4445039A
Cited
JPS60194593A
Cited
US4600907A
Cited
US4761517A
Cited
US5156353A
Cited
US4879433A
Cited
JPH0325993A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-07-30 | 2000-01-29 | 2000-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-07-30 | 2004-01-29 | 2004-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-07-30 | 2008-01-29 | 2008-07-30 | $7700.00 | Window Closed / Lapsed |