M. Kiuchi, Ryoma Miyake, S. Yoshida, Shuji Tanaka, Tsuyoshi Takemoto, Y. Yamaguchi, K. Komaki
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Commercial Production of Low-k PZT film using Sputtering Method
Monocrystalline-like epitaxial PZT films for commercial use are described for piezoelectric MEMS applications. The composition ratios of Zr and Ti in the films are Morphotropic phase boundary (52:48) and Ti rich (42:58). The films with a thickness of 1 μm to 2 μm exhibit typical transverse piezoelectric d31 coefficients of -185 pm/V and -149 pm/V, respectively. Relative dielectric permittivities are 430 and 264. Dielectric losses are 0.015 and 0.020. Both of films of figure-of-merit for MEMS device are more than 50 GPa. These films are commercially available for piezoelectric MEMS device development and production.
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