Patent ID: 6723915
Filing Date: 2004-04-20
Classification: G06F,H05K

Abstract:
An EMI-shielding riser card comprising at least six stacked adjoining layers:at least three ground layers; at least one power layer; and at least two signal layers, at least one of the at least two signal layers including a via formed therein; a trace on a surface of the at least one signal layer including the via, the trace running through the via; wherein the EMI-shielding riser card is a flat sheet of layered material shaped to fill an opening between two compartments of a computer enclosure, thereby dividing the computer enclosure into an EMI source compartment containing a source of EMI and an unshielded compartment containing a device, wherein the trace is in electrical communication with the EMI source and the device, and wherein at least one of the at least three ground layers is positioned to be interposed between the EMI source compartment and the at least two signal layers, and to cover the via and substantially all of the trace that is in electrical communication with the device in the unshielded compartment when the riser card is mounted in the computer enclosure.