US6943288B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
EMI foil laminate gasket
Assignee: Schlegel Systems Inc
•
Filing: 2004-06-04
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Granted: 2005-09-13
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Expires: 2024-06-04
Abstract
Abstract A conductive electromagnetic interference (EMI) shielding gasket having a compressible non-conductive core enwrapped with a conductive sheath. The sheath is a laminate formed by laminating a conductive metal foil at least 0.2 mils thick to a flexible non-conductive substrate, preferably a non porous polyester film.
Inventors
- 👤 Stanley R. Miska
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:15
CPC Classifications
H; H05; H05K; H05K9/00; H05K9/0007; H05K9/0015; H05K9/0073; H05K9/0081; H05K9/0084; Y; Y10; Y10S; Y10S277/00; Y10S277/92; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49124; Y10T29/49155
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
100 words
In a conductive electromagnetic interference (EMI) shielding gasket including a compressible core having a conductive laminate on a least one surface of the core, the improvement comprising the laminate having: a) a substrate being one of a woven fabric, a non woven fabric and a polymeric film; b) an adhesive layer on a surface of the substrate; c) a metal foil at least 0.2 mils thick bonded to the substrate by the adhesive directly contacting a reverse surface of the metal foil; and d) a vapor deposited abrasion and corrosion resistant coating on the obverse surface of the metal foil.
Claim 2
Dependent Claim
100 words
In a conductive electromagnetic interference (EMI) shielding gasket including a compressible core having a conductive laminate on a least one surface of the core, the improvement comprising the laminate having: a) a substrate being one of a woven fabric, a non woven fabric and a polymeric film; b) an adhesive layer on a surface of the substrate; c) a metal foil at least 0.2 mils thick bonded to the substrate by the adhesive directly contacting a reverse surface of the metal foil; and d) a vapor deposited abrasion and corrosion resistant coating on the obverse surface of the metal foil.
Claim 3
Dependent Claim
17 words
A conductive EMI shielding gasket as in claim 1 wherein the substrate is a non-porous polymeric film.
Claim 4
Dependent Claim
22 words
A conductive EMI shielding gasket as in claim 1 wherein the substrate is a non-woven polyester and the metal foil is aluminum.
Claim 5
Dependent Claim
31 words
A conductive EMI shielding gasket as in claim 1 wherein the substrate comprises a polyester film substrate, the metal foil is aluminum and the compressible core is an open cell polyurethane.
Claim 6
Dependent Claim
40 words
A conductive EMI shielding gasket as in claim 1 wherein the surface resistivity of the gasket is below 0.004 ohms/square and the average Shielding Effectiveness over a range of frequencies from 20 MHz to 10 GHz is below 97 dB.
Claim 7
Dependent Claim
16 words
A conductive EMI shielding gasket as in claim 1 wherein the adhesive is ethyl acrylic acetate.
Claim 8
Dependent Claim
51 words
A conductive EMI shielding gasket as in claim 1 wherein the contact resistance is less than 0.11 Ohms-inch at a 1 kg load, the surface resistivity is less than 0.003 ohms/sq and the average Shielding Effectiveness over a range of frequencies from 20 MHz to 10 GHz is below 97 dB.
Claim 9
Dependent Claim
110 words
A conductive EMI shielding gasket comprising: a) a core composed of an open cell polyurethane foam; b) a sheath wrapped around the core, the sheath having a non porous, non woven polyester film substrate, an acrylate adhesive layer on a surface of the substrate, a metal foil at least 0.2 inches thick bonded to the substrate by the adhesive and a vapor deposited abrasion and corrosion resistant coating on the exposed surface of the metal foil; and c) the gasket having a surface resistivity of less than 0.003 ohms/sq and an average Shielding Effectiveness over a range of frequencies from 20 MHz to 10 GHz that is below 97 dB.
Claim 10
Dependent Claim
110 words
A conductive EMI shielding gasket comprising: a) a core composed of an open cell polyurethane foam; b) a sheath wrapped around the core, the sheath having a non porous, non woven polyester film substrate, an acrylate adhesive layer on a surface of the substrate, a metal foil at least 0.2 inches thick bonded to the substrate by the adhesive and a vapor deposited abrasion and corrosion resistant coating on the exposed surface of the metal foil; and c) the gasket having a surface resistivity of less than 0.003 ohms/sq and an average Shielding Effectiveness over a range of frequencies from 20 MHz to 10 GHz that is below 97 dB.
Claim 11
Dependent Claim
14 words
A conductive EMI gasket as in claim 8 wherein the metal foil is aluminum.
Claim 12
Independent Claim
69 words
A method of making a conductive EMI gasket comprising: a) forming a sheath by laminating a metal foil at least 0.2 inches thick to a substrate comprising one of a woven fabric, a non woven fabric and a polymeric film, the sheath including a corrosion resistant coating on the exposed surface of the metal foil; and b) applying the sheath to at least one surface of a compressible core.
Claim 13
Independent Claim
69 words
A method of making a conductive EMI gasket comprising: a) forming a sheath by laminating a metal foil at least 0.2 inches thick to a substrate comprising one of a woven fabric, a non woven fabric and a polymeric film, the sheath including a corrosion resistant coating on the exposed surface of the metal foil; and b) applying the sheath to at least one surface of a compressible core.
Claim 14
Dependent Claim
16 words
A method as in claim 10 wherein the metal foil is one of aluminum and copper.
Claim 15
Dependent Claim
13 words
A method as in claim 10 wherein the polymeric film is a polyester.
Claim 16
Dependent Claim
29 words
A method as in claim 10 wherein laminating is accomplished by applying an adhesive to one of the substrate and the metal foil and pressing one against the other.
Claim 17
Dependent Claim
27 words
A method as in claim 10 wherein the corrosion resistant coating is applied to the surface of the metal foil after laminating the foil to the substrate.
Claim 18
Dependent Claim
15 words
A method as in claim 14 comprising applying the corrosion resistant coating by vapor deposition.
Claim 19
Dependent Claim
30 words
A method as in claim 10 wherein the substrate is a polymeric film and laminating of the foil to the substrate is accomplished by extruding polymeric film onto the substrate.
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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) | 2008-09-12 | 2009-03-14 | 2009-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2012-09-12 | 2013-03-14 | 2013-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2016-09-12 | 2017-03-14 | 2017-09-13 | $7700.00 | Window Closed / Lapsed |