A flexible cable comprises a cable body of a silicone material and circuits in the flexible cable body. In one embodiment the flexible cable body comprises a multiple number of individual layers of poly(dimethylsiloxane). In one embodiment silicone material encapsulates the individual layers. The flexible cable is made by providing a multiplicity of substrates of a flexible silicone material, producing circuits in the substrates, and stacking the multiplicity of substrates to produce the high density flexible cable.