Patent ID: 8569631

Claim:
A noise dampening energy efficient circuit board, comprising: a first insulating dielectric layer; a carbon material layer disposed on the first dielectric layer, the carbon material layer extending contiguously between the edges of the circuit board; a second insulating dielectric layer having a particular thickness, the second insulating dielectric layer disposed on the carbon material layer; and a conductive layer formed into a conductive pattern, the conductive layer disposed on the second insulating dielectric layer, wherein the carbon material layer includes resin-impregnated carbon fiber fabric; the carbon material layer being encapsulated between the insulating dielectric layers so as to float in electrical isolation from the conductive layer, and having resin-impregnated carbon fibers extending contiguously between the edges of the circuit board substantially parallel to the dielectric and conductive layers and being resistively conductive to electromagnetic radiation to dampen electromagnetic noise relative to the conductive layer, wherein, the resin-impregnated carbon fiber fabric has a specific resistance no greater than 100 Ω/cm2.