SAW filter manufacture and piezoelectric materials evaluation based on printed electronics technology

Abstract:

In this paper, the silver nanoparticle ink and ink-jet printing technology are used to manufacture the surface acoustic wave (SAW) filters. The characteristics of three common substrate piezoelectric materials of ST-quartz, Y36°-LiTaO₃ and Y128°-LiNbO₃ are evaluated. The experimental results show that Y128°-LiNbO₃ matches the ink much better than others. The printed SAW filter with Y128°-LiNbO₃ as piezoelectric substrate is realized, and its center frequency and bandwidth are 18.4 MHz and 500 kHz, respectively.