Patent ID: 6713685
Filing Date: 2004-03-30
Classification: H01L,H05K

Abstract:
An EMI shielding structure for a printed circuit for shielding a plurality of wire circuit trace layers that are electrically isolated by printed circuit board layers, characterized by:a printed circuit board having a plurality of wire trace circuit layers and a plurality of printed circuit board insulation layers there between and having a plurality of printed circuit board edges and a grounding plane; and a first trench having an interior wall and extending in parallel with the board edge within a perimeter defined by the board edge encompassing the printed circuit board wire circuit trace and extending through the printed circuit board layers and extending to the ground plane, exposing said ground plane; and an electrically conductive plating material applied over the interior wall there through and electrically connecting to the exposed ground plane providing at least a partial perimeter shield for the printed circuit board and an EMC sensitive track of conductive material extending wholly within and parallel with an outer perimeter defined by a first elongated through hole and disposed between circuit board insulation layers through with the trenched through hole extends.