Durable transparent EMI shielding film
First Claim
1. A process for transparently shielding a device or an enclosed area that can cause or is sensitive to electromagnetic interference, comprising at least partially surrounding the device or area with a visible light-transmissive film comprising a flexible support, an extensible visible light-transmissive continuous metal or metal alloy layer and a visible light-transmissive crosslinked polymeric protective layer, wherein the metal or metal alloy layer is coextensive with the support and when incorporated into the visible light-transmissive film can be stretched by at least 3% in an in-plane direction without loss of electrical continuity and without forming visible discontinuities in the surface of the metal or metal alloy layer as detected by the naked eye at a distance of about 0.25 meters;
- and connecting at least one grounding electrode to the metal or metal alloy layer.
1 Assignment
0 Petitions
Accused Products
Abstract
A device or an enclosed area that can cause or is sensitive to electromagnetic interference (EMI) is shielded by at least partially surrounding the device or the area with a visible light-transmissive film comprising a flexible support, an extensible visible light-transmissive metal or metal alloy layer and a visible light-transmissive crosslinked polymeric protective layer, and connecting at least one grounding electrode to the metal or metal alloy layer. The film has reduced susceptibility to fracture or corrosion compared to commercially available EMI shielding films.
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Citations
27 Claims
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1. A process for transparently shielding a device or an enclosed area that can cause or is sensitive to electromagnetic interference, comprising at least partially surrounding the device or area with a visible light-transmissive film comprising a flexible support, an extensible visible light-transmissive continuous metal or metal alloy layer and a visible light-transmissive crosslinked polymeric protective layer, wherein the metal or metal alloy layer is coextensive with the support and when incorporated into the visible light-transmissive film can be stretched by at least 3% in an in-plane direction without loss of electrical continuity and without forming visible discontinuities in the surface of the metal or metal alloy layer as detected by the naked eye at a distance of about 0.25 meters;
- and connecting at least one grounding electrode to the metal or metal alloy layer.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An electromagnetically shielded article comprising a device or enclosed area that can cause or is sensitive to electromagnetic interference, wherein the device or area is at least partially surrounded with a visible light-transmissive film comprising a flexible support, an extensible visible light-transmissive continuous metal or metal alloy layer and a visible light-transmissive crosslinked polymeric protective layer, wherein the metal or metal alloy layer is coextensive with the support and when incorporated into the visible light-transmissive film can be stretched by at least 3% in an in-plane direction without loss of electrical continuity and without forming visible discontinuities in the surface of the metal or metal alloy layer as detected by the naked eye at a distance of about 0.25 meters;
- and at least one grounding electrode connected to the metal or metal alloy layer.
- View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. An electromagnetically shielded article comprising an electromagnetic shield surrounding a device or enclosed area that can cause or is sensitive to electromagnetic interference, wherein at least a portion of the shield comprises a visible light-transmissive film comprising a flexible support, and first and second extensible visible light-transmissive continuous metal or metal alloy layers separated by a visible light-transmissive crosslinked polymeric protective layer, wherein the metal or metal alloy layer is coextensive with the support and when incorporated into the visible light-transmissive film can be stretched by at least 3% in an in-plane direction without loss of electrical continuity and without forming visible discontinuities in the surface of the metal or metal alloy layer as detected by the naked eye at a distance of about 0.25 meters.
Specification