US4996097A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High capacitance laminates
Assignee: W.L. Gore and Associates Inc
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Filing: 1989-03-16
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Granted: 1991-02-26
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Expires: 2009-03-16
Abstract
Abstract High capacitance laminates made of thin films of polytetrafluoroethylene filled with large amounts of dielectric filler, in which the films are plated or clad with conductive material.
Inventors
- 👤 Paul Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:19
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/04; B32B15/08; B32B15/085; B32B27/00; B32B27/18; B32B27/20; B32B27/32; B32B27/322; H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0313; H05K1/0353; H05K1/0373; H05K1/16; H05K1/162; B32B2307/00; B32B2307/20; B32B2307/204; B32B2307/50; B32B2307/54; B32B2327/00; B32B2327/12; B32B2327/18; B32B2457/00; B32B2457/08; H05K2201/00; H05K2201/01; H05K2201/0104; H05K2201/0116; H05K2201/0137; H05K2201/015; H05K2201/02; H05K2201/0203; H05K2201/0206; H05K2201/0209; Y; Y10; Y10S; Y10S428/00; Y10S428/901; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154; Y10T428/31544
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
73 words
A laminate comprising: (a) a thin film of filled polytetrafluoroethylene that: 1. contains 25-85 volume percent particulate filler having a high dielectric constant, 2. has a film thickness of between 0.0001 and 0.005 inches, 3. is substantially free of visual pinholes, and 4. has a matrix tensile strength of at least 2600 psi, and (b) a film of conductive metal attached to at least one side of the film defined in Part (a).
Claim 2
Dependent Claim
73 words
A laminate comprising: (a) a thin film of filled polytetrafluoroethylene that: 1. contains 25-85 volume percent particulate filler having a high dielectric constant, 2. has a film thickness of between 0.0001 and 0.005 inches, 3. is substantially free of visual pinholes, and 4. has a matrix tensile strength of at least 2600 psi, and (b) a film of conductive metal attached to at least one side of the film defined in Part (a).
Claim 3
Dependent Claim
16 words
The laminate of claim 1 wherein the laminate has a dielectric constant of at least 7.
Claim 4
Dependent Claim
18 words
The laminate of claim 1 where the filler is TiO 2 or barium titanate or a ferroelectric complex.
Claim 5
Dependent Claim
13 words
A printed circuit board containing a layer of the laminate of claim 1.
Claim 6
Dependent Claim
16 words
A laminate of claim 1 having a capacitance of greater than 650 picofarads per square inch.
Claim 7
Dependent Claim
14 words
A laminate of claim 1 wherein the break strength is at least 1500 psi.
Claim 8
Dependent Claim
13 words
A laminate of claim 1 where the thin film contains a thermoset resin.
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) | 1994-02-25 | 1994-08-27 | 1995-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-02-25 | 1998-08-27 | 1999-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-02-25 | 2002-08-27 | 2003-02-26 | $7700.00 | Window Closed / Lapsed |