Ac electrical properties of the dielectric part-hard hydrocarbon plasm
a polymer C: H of the composite Ag/C: H prepared by an unbalanced magn
etron were investigated. Capacitance and dielectric losses tg 6 of the
C:H film sandwiched between the two Al thin film electrodes and measu
red without breaking vacuum at a single frequency (1592 Hz) decreased
considerably with time. In addition ac conductivity of the C: H film w
ithin 10 min after its deposition was measured in the frequency range
10-10(4) Hz. An explanation in terms of post deposition trapped free r
adical reactions resulting in their decay is given. This is supported
by FTIR absorption measurements. (C) 1998 Elsevier Science Ltd. All ri
ghts reserved.