EMI shielding having flexible condustive sheet and I/O Gasket
First Claim
1. An electromagnetic shield, comprising:
- a flexible sheet comprising an electrically insulating material;
a conductive material substantially coextensive with the flexible sheet and defining a shielding barrier, the insulating material spacing the conductive material from at least an exposed insulating area on at least one surface of the flexible sheet on at least one side thereof, and the conductive material being exposed at another area on at least one side thereof, presenting an exposed contact area for coupling electrically to the conductive material;
wherein the flexible sheet substantially forms an enclosure for a circuit element, the enclosure having an opening, and wherein the insulating area and the contact area are arranged selectively, for protecting portions of the circuit element from contact with the conductive material, and for coupling the conductive material to a conductive body; and
,wherein the flexible sheet comprises a flange associated with the opening, a part of the contact area being disposed on the flange.
3 Assignments
0 Petitions
Accused Products
Abstract
An electronic device is shielded against electromagnetic interference using a flexible conductive sheet forming a shield barrier or enclosure. The sheet has electrically insulating polymer material exposed on the surface of at least one face. Conductive material is embedded in or laminated on the sheet so as to be exposed selectively. More particularly, a nonconductive surface area is formed, especially oriented inwardly to avoid electrical shorts, but also exposed inwardly or outwardly where necessary to ground the shield barrier or to engage with another conductive body. The flexible sheet can form a loose envelope with a flange-like gasket at an open end. The gasket can be used to improve physical contact with a conductive body, and preferably also admits I/O connectors that need to traverse the shield barrier, and advantageously have external shielding that is grounded to the shielding barrier for continuing the shielding enclosure. Alternatively or additionally, openings are provided in the sheet for access, the conductive material being insulated around a perimeter or the openings by insulating lips which prevent unwanted shorting. This permits changing or adding circuit chips without removing the shield, and can be provided with a flap closure for minimizing the gap in the shield. The flexible envelope can be joined to a circuit ground by clamping the gasket or the conductive fibers on an exposed face to a the I/O connector, to a common ground, or to an external grounded panel.
134 Citations
18 Claims
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1. An electromagnetic shield, comprising:
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a flexible sheet comprising an electrically insulating material; a conductive material substantially coextensive with the flexible sheet and defining a shielding barrier, the insulating material spacing the conductive material from at least an exposed insulating area on at least one surface of the flexible sheet on at least one side thereof, and the conductive material being exposed at another area on at least one side thereof, presenting an exposed contact area for coupling electrically to the conductive material; wherein the flexible sheet substantially forms an enclosure for a circuit element, the enclosure having an opening, and wherein the insulating area and the contact area are arranged selectively, for protecting portions of the circuit element from contact with the conductive material, and for coupling the conductive material to a conductive body; and
,wherein the flexible sheet comprises a flange associated with the opening, a part of the contact area being disposed on the flange. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. In combination, a shield and a shielded circuit element, comprising:
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the shield having a flexible sheet comprising an electrically insulating material and a conductive material substantially coextensive with the flexible sheet and defining a shielding barrier, the insulating material spacing the conductive material from at least an exposed insulating area on at least one surface of the flexible sheet on at least one side thereof, and the conductive material being exposed at another area on at least one side thereof, presenting an exposed contact area for coupling electrically to the conductive material; wherein the flexible sheet substantially forms an enclosure for the circuit element, the enclosure having an opening, and wherein the insulating area and the contact area are arranged selectively, for protecting portions of the circuit element from contact with the conductive material, and for coupling the conductive material to a conductive body; and
,wherein the flexible sheet comprises a flange associated with the opening, a part of the contact area being disposed on the flange. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification