Dielectric characteristics of ultra-pure SP adulterated with PANI

Restraining the impurity ions' conductance under high temperature and preventing movement and accumulating of the ions under high field are concerned much in power silicon devices' surface passivation. More attention should be paid to the high temperature conductance characteristic of silicone resin modified polyester (SP), which is used in power silicon device's surface protection. The resistivity-temperature characteristic of PANI/SP composite, showing a positive resistivity-temperature characteristic or 'Platform effect' in some temperature region, differs significantly from that of pure SP. The temperature threshold from electron conductance to ion conductance increases from 343 K to 383 K, which has different conductance mechanism. Permitivity and dielectric loss (tan/spl delta/) have little difference between SP and PANI-SP composite with certain ratio. Fourier transform infrared spectroscopy (FTlR) shows that the same solidification procedure for PANI/SP composite can be used as that for SP.