Patent US4451527A successfully refreshed from Google Patents.
US4451527A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conformable metal-clad laminate
Assignee: 3M Co
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Filing: 1981-07-28
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Granted: 1984-05-29
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Expires: 2001-07-28
Abstract
Abstract A metal clad laminate of at least about 20 mils dielectric thickness containing a low-loss dielectric soft polymeric material and at least two layers of glass cloth reinforcement, wherein the separation between the metal cladding and the nearest layer of glass cloth is at least about 7 mils of the soft polymeric material.
Inventors
- 👤 Murray Olyphant, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:07
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/04; B32B15/08; B32B15/085; B32B27/00; B32B27/12; B32B27/32; B32B27/322; H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0313; H05K1/032; H05K1/034; H05K1/0353; H05K1/036; B32B2255/00; B32B2255/02; B32B2255/26; B32B2315/00; B32B2315/08; B32B2315/085; H05K1/0213; H05K1/0237; H05K1/024; H05K1/0366; H05K2201/00; H05K2201/01; H05K2201/0137; H05K2201/015; H05K2201/0183; H05K2201/0191; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/266; Y10T428/31504; Y10T428/3154; Y10T428/31544; Y10T428/31678; Y10T442/00; Y10T442/60; Y10T442/654; Y10T442/656
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
120 words
In a metal clad laminate of at least about 20 mils dielectric thickness having a metallic foil on at least one surface thereof and containing at least one low-loss dielectric soft polymeric material having a room temperature elongation of at least about 75 percent and a tensile modulus of less than about 120,000 psi and wherein the polymer must have a dielectric loss tangent of less than 0.001 in the frequency range of from about 1 to about 10 G Hz and at least two layers of glass cloth reinforcement, the improvement comprising the separation of said metallic foil from the nearest of said layers of glass cloth reinforcement with at least about 7 mils of said soft polymeric material.
Claim 2
Dependent Claim
120 words
In a metal clad laminate of at least about 20 mils dielectric thickness having a metallic foil on at least one surface thereof and containing at least one low-loss dielectric soft polymeric material having a room temperature elongation of at least about 75 percent and a tensile modulus of less than about 120,000 psi and wherein the polymer must have a dielectric loss tangent of less than 0.001 in the frequency range of from about 1 to about 10 G Hz and at least two layers of glass cloth reinforcement, the improvement comprising the separation of said metallic foil from the nearest of said layers of glass cloth reinforcement with at least about 7 mils of said soft polymeric material.
Claim 3
Dependent Claim
12 words
The laminate of claim 1 wherein said polymeric material is a fluorocarbon.
Claim 4
Dependent Claim
10 words
The laminate of claim 2 wherein said fluorocarbon is polytetrafluoroethylene.
Claim 5
Dependent Claim
14 words
The laminate of claim 1 wherein said polymeric material includes a thermoplastic fluorocarbon resin.
Claim 6
Dependent Claim
14 words
The laminate of claim 1 wherein said separation is at least about 10 mils.
Claim 7
Dependent Claim
12 words
The laminate of claim 1 wherein said dielectric thickness is 90 mils.
Claim 8
Dependent Claim
13 words
The laminate of claim 6 wherein said separation is at least 10 mils.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-05-29 | 1987-11-28 | 1988-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-29 | 1991-11-28 | 1992-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-29 | 1995-11-28 | 1996-05-29 | $7700.00 | Window Closed / Lapsed |