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US 6,672,902 B2Granted
Reducing electromagnetic interference (EMI) emissions
AssigneeIntel Corporation
InventorsHarry G. Skinner, Steve Y. Chang, Howard L. Heck, Yun Ji
Life of this patent
Estimating the term…
Abstract
A system includes a chassis having at least one wall, the chassis housing electrical components and a layer of flexible foam electromagnetic interference (EMI) emission absorption material covering an interior surface of the wall. A system also includes a chassis containing slots, the chassis housing electrical components and a layer of flexible foam electromagnetic interference (EMI) emission absorption material covering at least one of the slots.
Claims26
A system comprising:
- a chassis having at least one wall, the chassis housing electrical components;
- and a layer of flexible, lightweight, low density, high-loss foam electromagnetic interference (EMI) emission absorption material covering an interior surface of the wall, the material having a thickness of 0.01″ to 1.0″ and a density of 0.05 to 5 pounds per cubic foot.
Apparatus comprising:
- an electrical chassis, at least one rigid reticulated foam with a continuously graded lossy coating produced using a two part closed cell polyurethane filler connected to a plurality of non-shielded walls.
Apparatus comprising:
- panels joined to form a chassis;
- at least one bay located within an interior of the chassis, the bay having at least one wall;
- and
- a layer of flexible, lightweight, low density, high-loss foam EMI emission absorption material affixed to an interior surface of the wall of the bay, the material having a thickness of 0.01″ to 1.0″ and a density of 0.05 to 5 Pounds per cubic foot.
1 more element
An enclosure comprising:
- a front panel constructed from a rigid reticulated foam with a continuously graded lossy coating produced using a two part closed cell polyurethane filler and joined to two side panels, an upper panel and a lower panel;
- and
- a rear panel joined to the two side panels and upper and lower panels.
A method comprising:
- forming a front panel from a rigid reticulated foam with a continuously graded lossy coating produced using a two part closed cell polyurethane filler;
- and
- joining the front panel to a top and bottom panel, two side panels and a back panel.
A system comprising:
- a chassis containing a plurality of slots, the chassis housing electrical components;
- and
- a layer of flexible, lightweight, low density, high-loss foam electromagnetic interference (EMI) emission absorption material covering at least one of the slots, the material having a thickness of 0.01″ to 1.0″ and a density of 0.05 to 5 pounds per cubic foot.
Dependencies are inferred from the claim text.