Polyvinylpyrrolidone(PVP) thin film doped copper phthalocyanine(CuPC) is fabricated on the delayline of surface acoustic wave(SAW) component by using spin coating method.The thin film is characterized by four-point probe method and scanning electron microscopy(SEM).The results show that the CuPc particles are well dispersed in the polymeric matrix.The average size of CuPc particles in the film is about 20nm
and the electric conductivity of the thin film is about 10-6Ω-1·cm-1.According to the given theory
the shift of central frequency of SAW sensor due to the change of mass and electric conductivity of the sensitive film is calculated
the shift valum is in agreement with the experimental data.