An electric resistive heater having an extended temperature range and repeatable heating characteristics. The polymerization can be carried out in the presence of one or more blowing agents, producing polymers that can be expanded. Each forward transmission block may have a preamble portion and an associated body portion. While the potential is high in the vicinity of the surface of the P-type semiconductor substrate where defects are present, the potential is minimized in the vicinity of the PN junction plane formed by the N-type buried channel layer and the P-type semiconductor substrate. During field testing, the cellular telephone is configured to link the baseband unit to the external bus and the interface board.