Electrical wires may well be insulated with polyethylene, crosslinked polyethylene , PVC, Kapton, rubber-like polymers, oil impregnated paper, Teflon, silicone, or modified ethylene tetrafluoroethylene . Larger power cables might use compressed inorganic powder, based on the application. In microelectronic components such as transistors and ICs, the silicon material is typically a conductor simply