The influence of LF glow discharge treatment on the dielectric properties of PET film

The influence of low frequency glow discharge treatment on the dielectric properties of. PET film (loss angle and permittivity) was studied over a wide range of frequencies and temperatures. It was shown that the treatment of PET film does not influence the loss angle in the interval of frequencies 100 Hz-3 MHz and at temperatures from 20/spl deg/C to 200/spl deg/C: The permittivity of the treated PET film does not change at low frequencies in. the region from 20/spl deg/C to 200/spl deg/C, but at high frequencies (500 kHz-3 MHz) an apparent increase in a value is observed.