A sliding member is disclosed that has superior slidability and durability at a low cost. The method comprises forming a first metal gate on a wafer and second metal gate on the wafer. The method further includes comparing the common-mode voltage of the transmitter with a common-mode voltage of the receiver. Thus it is possible to provide thermal- and electric conducting composite materials with almost the same density and mechanical properties as the pure matrix material at the favourable cost of carbon black as filler. The automated injector source can include a hands-free input mechanism allowing a medical professional to use both hands in manipulating the delivery scope and needleless applicator at the same time an injection is desired.