Electricity: electrical systems and devices – Housing or mounting assemblies with diverse electrical... – For electronic systems and devices
Patent
1994-08-29
1996-12-17
Picard, Leo P.
Electricity: electrical systems and devices
Housing or mounting assemblies with diverse electrical...
For electronic systems and devices
361800, 361816, 174 35R, 257660, H05K 900
Patent
active
055860117
ABSTRACT:
An electric circuit board including EMI shielding. The board comprises a substrate including top and bottom surfaces and at least one internal ground layer, the internal ground layer being electrically insulated from the external surfaces of the substrate. A plurality of vias are formed in the substrate near the edges of the substrate, each via providing an opening from the surface of the substrate to the internal ground layer A metal plating is applied to the vias, the edges of the substrate and the perimeter of the surface of the substrate, the metal plating along the substrate perimeter being applied over the plated-up vias to electrically connect the ground plane with the metal plating applied to the edges of the substrate.
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patent: 4668332 (1987-05-01), Ohnuki et al.
patent: 4882454 (1989-11-01), Peterson et al.
patent: 5119047 (1992-06-01), Brown et al.
AT&T Global Information Solutions Company
Picard Leo P.
Stover James M.
Whang Y.
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