EMI/RFI shielding gasket
First Claim
Patent Images
1. An electrically conductive gasket comprising:
- an open-celled foam substrate having a skeletal structure and a pore density of from about 80 to about 250 pores per 25.4 mm; and
a metal coating deposited onto the skeletal structure; and
in the absence of a substantially non-metallic conductive coating over the metal coating, wherein the metal coating consists of nickel, wherein the gasket has a volume resistivity of less than 10 ohm-cm; and
wherein said gasket is substantially deformable with less than 50 psi of pressure; and
wherein said gasket is substantially recoverable after said pressure is removed.
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Abstract
AN EMI/RFI gasket with an open-celled foam substrate having a metal coating on its skeletal structure that is substantially deformable and recoverable. The gasket provides shielding effectiveness of greater than 40 dB.
95 Citations
24 Claims
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1. An electrically conductive gasket comprising:
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an open-celled foam substrate having a skeletal structure and a pore density of from about 80 to about 250 pores per 25.4 mm; and
a metal coating deposited onto the skeletal structure; and
in the absence of a substantially non-metallic conductive coating over the metal coating, wherein the metal coating consists of nickel, wherein the gasket has a volume resistivity of less than 10 ohm-cm; and
wherein said gasket is substantially deformable with less than 50 psi of pressure; and
wherein said gasket is substantially recoverable after said pressure is removed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 22, 23, 24)
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21. An electrically conductive gasket having an open-celled foam substrate which is substantially deformable with less than 50 psi of pressure and substantially recoverable after said pressure is removed and has between 80 and 140 pores per 25.4 mm;
- and a metal or combination of metals deposited throughout the open-celled foam substrate with a total thickness of less than 5 microns, such that the gasket is conductive throughout the open-celled foam substrate, said gasket made by the process comprising the steps of first sputtering said metal onto said foam and then electroplating the said metal or another metal onto said foam wherein said metal consists of nickel.
Specification