US6541698B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abrasion resistant conductive film and gasket
Assignee: SCHLEGEL ELECTRONIC MATERIALS Inc
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Filing: 2001-03-13
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Granted: 2003-04-01
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Expires: 2021-03-13
Abstract
Abstract A conductive gasket for use in apparatus to block the exit or entry of electromagnetic interference (EMI) between adjacent metal surfaces of the apparatus. The gasket is formed at least in part by a polymeric film having an outward facing surface embossed so as to provide a plurality of peaks distributed over the surface. A metal is coated, by vapor deposition, onto the surface so as to over lie the peaks. This provides the film with a conductive surface. When located between adjacent metal surfaces, abrasion of the metal coating from the peaks over time does not adversely affect the conductive properties of the film surface. This is because the wearing away of the metal from the tops of the peaks exposes a cross section of the metal at the sides of the peaks, which remain in contact with the adjacent metal surfaces of the apparatus.
Inventors
- 👤 Stanley R. Miska
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:26
CPC Classifications
H; H05; H05K; H05K9/00; H05K9/0007; H05K9/0015; Y; Y10; Y10S; Y10S277/00; Y10S277/92; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49124; Y10T29/49126; Y10T29/49128; Y10T29/49155
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
101 words
A gasket having electromagnetic interference (EMI) properties for disposition between adjacent metal components comprising a polymeric film having at least one side provided with an embossed surface so as to provide said surface with a plurality of peaks and valleys and a vapor deposited conductive metal coating on said surface overlying said peaks and valleys, said metal coating including a first metal layer as an adhesive layer on the surface of said film, a second metal coated onto said first layer as a conductive layer and a third metal coated onto said second layer as an abrasion and anti corrosion layer.
Claim 2
Dependent Claim
101 words
A gasket having electromagnetic interference (EMI) properties for disposition between adjacent metal components comprising a polymeric film having at least one side provided with an embossed surface so as to provide said surface with a plurality of peaks and valleys and a vapor deposited conductive metal coating on said surface overlying said peaks and valleys, said metal coating including a first metal layer as an adhesive layer on the surface of said film, a second metal coated onto said first layer as a conductive layer and a third metal coated onto said second layer as an abrasion and anti corrosion layer.
Claim 3
Dependent Claim
54 words
A gasket as in claim 1 wherein said film has opposite facing sides each of which has an embossed surface so as to provide a plurality of peaks and valleys and a metal coating on said surfaces overlying said peaks and valleys, said opposite facing sides being adapted for disposition between adjacent metal surfaces.
Claim 4
Dependent Claim
19 words
A gasket as in claim 1 wherein said layers are applied to said film in sequence by vapor deposition.
Claim 5
Dependent Claim
22 words
A gasket as in claim 3 wherein said conductive layer is selected from the group consisting of silver, copper, gold or platinum.
Claim 6
Dependent Claim
22 words
A gasket as in claim 3 wherein said first layer is selected from the group consisting of Nichrome, Inconel, chrome, or titanium.
Claim 7
Dependent Claim
22 words
A gasket as in claim 3 wherein said third layer is selected from the group consisting of nickel, tin, Nichrome, or Inconel.
Claim 8
Dependent Claim
80 words
A gasket having electromagnetic interference (EMI) properties for disposition between adjacent metal components comprising a polymeric film having at least one side provided with an embossed surface so as to provide said surface with plurality of peaks and valleys and a vapor deposited conductive metal coating on said surface overlying said peaks and valleys, said metal coating including an inner layer, and outer layer and a layer of a conductive metal disposed between the inner layer and the outer layer.
Claim 9
Dependent Claim
80 words
A gasket having electromagnetic interference (EMI) properties for disposition between adjacent metal components comprising a polymeric film having at least one side provided with an embossed surface so as to provide said surface with plurality of peaks and valleys and a vapor deposited conductive metal coating on said surface overlying said peaks and valleys, said metal coating including an inner layer, and outer layer and a layer of a conductive metal disposed between the inner layer and the outer layer.
Claim 10
Dependent Claim
23 words
A gasket as in claim 7 in which at least one of said inner layer and said outer layer is a non metal.
Claim 11
Dependent Claim
21 words
A gasket as in claim 7 wherein said film is selected from the group consisting of conductive and non-conductive polymeric films.
Claim 12
Dependent Claim
26 words
A gasket as in claim 7 wherein said peaks are distributed over the surface of said film in a density of about 165 peaks/in 2 .
Claim 13
Dependent Claim
18 words
A gasket as in claim 10 wherein said peaks are in the shape of flat-topped four sided pyramids.
Claim 14
Dependent Claim
27 words
A gasket as in claim 10 wherein said film is a 4-mil linear low-density film and said peaks have a height of about one-fourth the film thickness.
Claim 15
Dependent Claim
26 words
A gasket as in claim 7 including a resilient core and said polymeric film enclosing said core with said embossed surface facing outward from said core.
Claim 16
Dependent Claim
21 words
A gasket as in claim 7 wherein said film has a thickness of from about 0.5 mils to about 100 mils.
Claim 17
Dependent Claim
153 words
A gasket having electromagnetic interference properties for disposition between adjacent metal components comprising: a resilient core; a conductive sheath surrounding the resilient core; the conductive sheath being formed of a polymeric film having a reverse surface in contact with the resilient core and an obverse surface facing outward from the core, the obverse surface being embossed to provide a plurality of peaks integrally formed therein and standing above the plane of said obverse surface; and a conductive metal coating overlying said obverse surface including said peaks and valleys the metal coating including a first metal as an adhesive layer on the surface of said film, a second metal coated onto said first layer as a conductive layer and a third metal coated onto said second layer as abrasion and anti corrosion layer whereby the EMI provided by the gasket is unaffected by erosion of the metal coating from the tops of said peaks.
Claim 18
Dependent Claim
153 words
A gasket having electromagnetic interference properties for disposition between adjacent metal components comprising: a resilient core; a conductive sheath surrounding the resilient core; the conductive sheath being formed of a polymeric film having a reverse surface in contact with the resilient core and an obverse surface facing outward from the core, the obverse surface being embossed to provide a plurality of peaks integrally formed therein and standing above the plane of said obverse surface; and a conductive metal coating overlying said obverse surface including said peaks and valleys the metal coating including a first metal as an adhesive layer on the surface of said film, a second metal coated onto said first layer as a conductive layer and a third metal coated onto said second layer as abrasion and anti corrosion layer whereby the EMI provided by the gasket is unaffected by erosion of the metal coating from the tops of said peaks.
Claim 19
Dependent Claim
23 words
A gasket as in claim 15 in which at least one of said inner layer and said outer layer is a non metal.
Claim 20
Dependent Claim
22 words
A gasket as in claim 15 including a conductive metal coating on both the reverse an observe surfaces of said polymeric film.
Claim 21
Dependent Claim
14 words
A gasket as in claim 15 wherein said polymeric film is a non-conductive film.
Claim 22
Dependent Claim
12 words
A gasket as in claim 15 wherein said peaks are slope sided.
Claim 23
Dependent Claim
111 words
A gasket having electromagnetic interference properties for disposition between adjacent metal components comprising: a resilient core; a conductive sheath surrounding the resilient core; the conductive sheath being formed of a polymeric film having a reverse surface in contact with the resilient core and an obverse surface facing outward from the core, the obverse surface being embossed to provide a plurality of peaks standing above the plane of said obverse surface; and a conductive metal coating overlying said obverse surface including said peaks and valleys wherein said metal coating includes an inner layer, an outer layer, and a layer of a conductive metal disposed between the inner layer and the outer layer.
Claim 24
Dependent Claim
111 words
A gasket having electromagnetic interference properties for disposition between adjacent metal components comprising: a resilient core; a conductive sheath surrounding the resilient core; the conductive sheath being formed of a polymeric film having a reverse surface in contact with the resilient core and an obverse surface facing outward from the core, the obverse surface being embossed to provide a plurality of peaks standing above the plane of said obverse surface; and a conductive metal coating overlying said obverse surface including said peaks and valleys wherein said metal coating includes an inner layer, an outer layer, and a layer of a conductive metal disposed between the inner layer and the outer layer.
Claim 25
Dependent Claim
113 words
A gasket having electromagnetic interference (EMI) properties for disposition between adjacent conductive components comprising a polymeric film having at least one side provided with a plurality of embossed surface features, integrally formed in the film, the features comprising side portions, and a top portion and a multi-layer, vapor deposited conductive metal coating on the side portions and the top portion, the thickness of the coating being sufficient so that if the coating is abraded from the top portion, and upper surface of the side portions exposed and contacts the adjacent conductive surface, whereby the EMI shield provided by the gasket is substantially unaffected by erosion of the metal coating from the top portions.
Claim 26
Dependent Claim
113 words
A gasket having electromagnetic interference (EMI) properties for disposition between adjacent conductive components comprising a polymeric film having at least one side provided with a plurality of embossed surface features, integrally formed in the film, the features comprising side portions, and a top portion and a multi-layer, vapor deposited conductive metal coating on the side portions and the top portion, the thickness of the coating being sufficient so that if the coating is abraded from the top portion, and upper surface of the side portions exposed and contacts the adjacent conductive surface, whereby the EMI shield provided by the gasket is substantially unaffected by erosion of the metal coating from the top portions.
Claim 27
Dependent Claim
44 words
The gasket of claim 21 in which the side portions and the top portion of the embossed surface features are arranged at an angle that increases the area of the side portions of the coating that are exposed by abrasion of the top portions.
Claim 28
Dependent Claim
23 words
The gasket of claim 21 in which the angle between the top portion and the side portion is substantially greater than 90 degrees.
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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) | 2006-03-31 | 2006-09-30 | 2007-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-03-31 | 2010-09-30 | 2011-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-03-31 | 2014-09-30 | 2015-04-01 | $7700.00 | Window Closed / Lapsed |