EMI shield that adheres to and conforms with printed circuit...

Details EMI shield that adheres to and conforms with printed circuit... EMI shield that adheres to and conforms with printed circuit...

2007-03-27

2007-03-27

Ngo, Hung V. (Department: 2831)

Electricity: conductors and insulators

Anti-inductive structures

Shielded

C174S377000

Reexamination Certificate

active

10674107

ABSTRACT:
An electrically continuous, grounded conformal EMI protective shield and methods for applying same directly to the surfaces of a printed circuit board. The EMI shield adheres and conforms to the surface of the components and printed wiring board. The shield takes the shape of the covered surfaces while adding little to the dimensions of the surfaces. The EMI shield includes low viscosity, high adherence conductive and dielectric coatings each of which can be applied in one or more layers using conventional spray techniques. The conductive coating prevents substantially all electromagnetic emissions generated by the shielded components from emanating beyond the conformal coating. The dielectric coating is initially applied to selected locations of the printed circuit board so as to be interposed between the conductive coating and the printed circuit board, preventing the conductive coating from electrically contacting selected components and printed wiring board regions.

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patent: 6377475 (2002-04-01), Reis

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