| http://www.w3.org/ns/prov#value | - A typical multi-layered printed circuit board (PCB) 12, shown in FIG. 1B, consists of multiple alternating layers of metal, typically copper, 14 a,b and dielectric 16 a,b where the dielectric is typically epoxy, epoxy impregnated with fillers such as glass fibers, teflon, polyimide, BT or other choices of suitable dielectric material.
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