Secondly, after the completion of the Bragg reflector, a piezoelectric layer sandwiched between two electrodes was deposited onto the Bragg reflector. Pt thin film was employed as the bottom electrode and patterned using photolithography and lift-off techniques. ZnO piezoelectric layer was deposited on the bottom electrode using a reactive rf magnetron sputtering system. Finally, the transparent film of the alloy of Ag and Ti was deposited and patterned as the top electrode of G-S-G type to fit Cascade Microtech's coplanar probes. The detailed fabrication processes of an SMR device is illustrated in Fig. 1.