US5524908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-layer EMI/RFI gasket shield
Assignee: W.L. Gore and Associates Inc
•
Filing: 1994-09-14
•
Granted: 1996-06-11
•
Expires: 2014-09-14
Abstract
Abstract An multi-layered EMI gasket has a first layer constructed of an electrically conductive resilient material and a second, support layer of an electrically conductive material secured in facing engagement with the first layer. The material of the second layer is more rigid than the material of the first layer, so that the second layer imparts rigidity to the gasket. Preferably, the resilient material is carbon particle filled EPTFE and the support layer is a metal foil. The combination of these elements is very effective at conducting electrical signals, thereby providing exceptional EMI/RFI shielding of electronic components, while being far easier to handle and install than prior art gaskets. Further, the resilient material of the first layer permits the gasket to conform to irregular surfaces, thus providing an excellent environmental seal.
Inventors
- 👤 Bradley E. Reis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:03
CPC Classifications
H; H05; H05K; H05K9/00; H05K9/0007; H05K9/0015; Y; Y10; Y10S; Y10S277/00; Y10S277/916; Y10S277/919; Y10S277/92
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
67 words
A multi-layered gasket for shielding electrical components from electromagnetic interference comprising: a first flexible layer of electrically conductive resilient material; a second, electrically conductive support layer secured to the first layer in facing engagement, the support layer being less flexible than the first layer so as to impart stiffness to the first layer; and wherein the second layer is approximately one-fifth as thick as the first layer.
Claim 2
Dependent Claim
67 words
A multi-layered gasket for shielding electrical components from electromagnetic interference comprising: a first flexible layer of electrically conductive resilient material; a second, electrically conductive support layer secured to the first layer in facing engagement, the support layer being less flexible than the first layer so as to impart stiffness to the first layer; and wherein the second layer is approximately one-fifth as thick as the first layer.
Claim 3
Dependent Claim
14 words
The gasket of claim 1 wherein the first layer comprises carbon particle filled EPTFE.
Claim 4
Dependent Claim
28 words
The gasket of claim 1 wherein the material of the support layer is selected from the group consisting of copper, aluminum, nickel, gold, silver, tin and alloys thereof.
Claim 5
Dependent Claim
14 words
The gasket of claim 1 wherein the first layer comprises a conformable, conductive material.
Claim 6
Dependent Claim
25 words
The gasket of claim 4 wherein the conformable conductive material comprises a carbon particle filled EPTFE and the second, support layer comprises a metal foil.
Claim 7
Dependent Claim
18 words
The gasket of claim 1 wherein each of the first and second layers further comprise a discontinuous leg.
Claim 8
Dependent Claim
27 words
The gasket of claim 1 wherein the support layer includes a tab extending outwardly therefrom, wherein the tab is formable for securing the gasket to a substrate.
Claim 9
Dependent Claim
32 words
The gasket of claim 1 wherein the first layer includes a through hole in a leg of the gasket and the second layer includes a tab which projects through the through hole.
Claim 10
Dependent Claim
25 words
The gasket of claim 1 wherein the gasket includes a transverse notch for allowing a circuit board trace to pass therebeneath without contacting the gasket.
Claim 11
Dependent Claim
23 words
The gasket of claim 1 wherein the support layer includes an arcuate cross-section for mating to a substrate having a complementary arcuate cross-section.
Claim 12
Dependent Claim
72 words
The gasket of claim 1 wherein the first and second layers have a plurality of corners, at least one of the corners being bent such that the corner extends at an angle of 45 degrees or greater from the first and second layers for acting as a planar shield to provide a clearance over the first and second layers equal to a thickness of the gasket for also providing shock absorbing capabilities.
Claim 13
Dependent Claim
25 words
The gasket of claim 1 wherein the support layer includes one or more holes for allowing the first, resilient layer to protrude through the hole.
Claim 14
Dependent Claim
28 words
The gasket of claim 1 wherein the support layer is comprised of a mesh layer and a portion of the first, resilient material layer extends through the mesh.
Claim 15
Dependent Claim
13 words
The gasket of claim 13 wherein the mesh layer comprises a conductive polymer.
Claim 16
Dependent Claim
31 words
The gasket of claim 13 further comprising an adhesive positioned between the support layer and the first, resilient material layer, at least a portion of the adhesive extending into the mesh.
Claim 17
Dependent Claim
16 words
The gasket of claim 1 further comprising a means for fastening the gasket to a substrate.
Claim 18
Dependent Claim
29 words
The gasket of claim 15 wherein the first and second layers include a plurality of through holes for receiving a fastener, the fastener securing the gasket to a substrate.
Claim 19
Dependent Claim
36 words
The gasket of claim 1 further comprising a third layer of electrically conductive resilient material secured in facing engagement with the support layer, such that the support layer is positioned between the first and third layers.
Claim 20
Dependent Claim
39 words
The gasket of claim 1 further comprising a third layer of electrically conductive material secured in facing engagement with the first, resilient material layer, such that the first, resilient material layer is positioned between the second and third layers.
Claim 21
Dependent Claim
28 words
The gasket of claim 1 wherein the gasket comprises a multiple layered structure having multiple EMI patterns for attachment around a component to provide shielding to multiple surfaces.
Claim 22
Dependent Claim
121 words
A multi-layered gasket for shielding electrical components from electromagnetic interference comprising: a first flexible layer of electrically conductive resilient material; a second, electrically conductive support layer secured to the first layer in facing engagement, the support layer being less flexible than the first layer so as to impart stiffness to the first layer; and wherein the first and second layers have a plurality of corners, at least one of the corners being bent such that the corner extends at an angle of 45 degrees or greater from the first and second layers for acting as a planar shield to provide a clearance over the first and second layers equal to a thickness of the gasket for also providing shock absorbing capabilities.
Claim 23
Dependent Claim
121 words
A multi-layered gasket for shielding electrical components from electromagnetic interference comprising: a first flexible layer of electrically conductive resilient material; a second, electrically conductive support layer secured to the first layer in facing engagement, the support layer being less flexible than the first layer so as to impart stiffness to the first layer; and wherein the first and second layers have a plurality of corners, at least one of the corners being bent such that the corner extends at an angle of 45 degrees or greater from the first and second layers for acting as a planar shield to provide a clearance over the first and second layers equal to a thickness of the gasket for also providing shock absorbing capabilities.
Claim 24
Dependent Claim
74 words
A multi-layered gasket for shielding electrical components from electromagnetic interference comprising: a first flexible layer of electrically conductive resilient material; a second, electrically conductive support layer secured to the first layer in facing engagement, the support layer being less flexible than the first layer so as to impart stiffness to the first layer; and wherein the gasket includes a transverse notch for allowing a circuit board trace to pass therebeneath without contacting the gasket.
Claim 25
Dependent Claim
74 words
A multi-layered gasket for shielding electrical components from electromagnetic interference comprising: a first flexible layer of electrically conductive resilient material; a second, electrically conductive support layer secured to the first layer in facing engagement, the support layer being less flexible than the first layer so as to impart stiffness to the first layer; and wherein the gasket includes a transverse notch for allowing a circuit board trace to pass therebeneath without contacting the gasket.
Claim 26
Dependent Claim
72 words
A multi-layered gasket for shielding electrical components from electromagnetic interference comprising: a first flexible layer of electrically conductive resilient material; a second, electrically conductive support layer secured to the first layer in facing engagement, the support layer being less flexible than the first layer so as to impart stiffness to the first layer; and wherein the support layer includes an arcuate cross-section for mating to a substrate having a complementary arcuate cross-section.
Claim 27
Dependent Claim
72 words
A multi-layered gasket for shielding electrical components from electromagnetic interference comprising: a first flexible layer of electrically conductive resilient material; a second, electrically conductive support layer secured to the first layer in facing engagement, the support layer being less flexible than the first layer so as to impart stiffness to the first layer; and wherein the support layer includes an arcuate cross-section for mating to a substrate having a complementary arcuate cross-section.
Claim 28
Dependent Claim
77 words
A multi-layered gasket for shielding electrical components from electromagnetic interference comprising: a first flexible layer of electrically conductive resilient material; a second, electrically conductive support layer secured to the first layer in facing engagement, the support layer being less flexible than the first layer so as to impart stiffness to the first layer; and wherein the gasket comprises a multiple layered structure having multiple EMI patterns for attachment around a component to provide shielding to multiple surfaces.
Claim 29
Dependent Claim
77 words
A multi-layered gasket for shielding electrical components from electromagnetic interference comprising: a first flexible layer of electrically conductive resilient material; a second, electrically conductive support layer secured to the first layer in facing engagement, the support layer being less flexible than the first layer so as to impart stiffness to the first layer; and wherein the gasket comprises a multiple layered structure having multiple EMI patterns for attachment around a component to provide shielding to multiple surfaces.
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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) | 1999-06-11 | 1999-12-11 | 2000-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-06-11 | 2003-12-11 | 2004-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-06-11 | 2007-12-11 | 2008-06-11 | $7700.00 | Window Closed / Lapsed |