US4824381A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit board containing a metal net
Assignee: Perstorp AB
•
Filing: 1988-01-29
•
Granted: 1989-04-25
•
Expires: 2008-01-29
Abstract
Abstract Metal net, mainly intended for the production of printed circuit boards. Said net is made of covar, molybdenum, invar or wolfram and is possibly coated with copper.
Inventors
- 👤 Tommy H. Hertzberg
- 👤 Bernt Ekstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:16
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/46; H05K3/4611; H05K3/4641; H05K1/00; H05K1/02; H05K1/03; H05K1/05; H05K2201/00; H05K2201/06; H05K2201/068; H05K2201/09; H05K2201/09209; H05K2201/09654; H05K2201/09681
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
33 words
A printed circuit board which comprises as a part of the circuit board at least one metal net made of a material taken from the group consisting of Covar, Invar, molybdenum or wolfram.
Claim 2
Dependent Claim
33 words
A printed circuit board which comprises as a part of the circuit board at least one metal net made of a material taken from the group consisting of Covar, Invar, molybdenum or wolfram.
Claim 3
Dependent Claim
18 words
A printed circuit board according to claim 1, wherein the net has been provided with a copper coating.
Claim 4
Dependent Claim
23 words
A printed circuit board according to claim 2, wherein the net has been provided with a copper coating by electroplating or chemical deposition.
Claim 5
Dependent Claim
17 words
A printed circuit board according to claim 1, wherein the overall thickness of the net is 50-2000μ.
Claim 6
Dependent Claim
17 words
A printed circuit board according to claim 1, wherein the overall thickness of the net is 50-500μ.
Claim 7
Dependent Claim
35 words
A printed circuit board according to claim 1 or claim 9, wherein the net has been coated with a partially cured resin selected from the group consisting of epoxy resin polyimide resin or phenolic resin.
Claim 8
Dependent Claim
24 words
A printed circuit board according to claim 1, wherein the board is a multilayer board with a coefficient of thermal expansion of 5-9 ppm/°C.
Claim 9
Dependent Claim
17 words
A printed circuit board according to claim 7, wherein the coefficient of thermal expansion is 6-8 ppm/°C.
Claim 10
Dependent Claim
18 words
A printed circuit board according to claim 1, wherein the metal net is used as a ground plane.
Claim 11
Dependent Claim
18 words
A printed circuit board according to claim 1, wherein the metal net is used as a power plane.
Claim 12
Dependent Claim
26 words
A printed circuit board according to claim 1, wherein the metal net is used as a layer reducing the thermal expansion of the printed circuit board.
References Cited (Backward Citations)
US2962057A
Cited
US3297461A
Cited
US3615373A
Cited
US3936548A
Cited
SE430742B
Cited
US4569692A
Cited
US4754546A
Cited
US4711804A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-04-24 | 1992-10-24 | 1993-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-24 | 1996-10-24 | 1997-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-24 | 2000-10-24 | 2001-04-25 | $7700.00 | Window Closed / Lapsed |