An improved shielding assembly for a circuit board. The assembly includes a multi-layer circuit board, each layer of which has ground planes around the perimeter thereof. An edge plating on the circuit board connects the ground planes to one another. A number of tab holes are also in the board, and the...http://www.google.es/patents/US5043848?utm_source=gb-gplus-sharePatente US5043848 - Shielded printed circuit board
