Keating & Bennett, LLP
Piezoelectric resonator, piezoelectric filter, duplexer, communication apparatus, and method for manufacturing piezoelectric resonator
A piezoelectric thin film resonator having a stabilized temperature characteristic of resonant frequency, a method for manufacturing the same, and a communication apparatus using the piezoelectric thin film resonator are provided. The piezoelectric thin film resonator is provided with a substrate having an opening, first and second insulation films which are provided on one surface of the substrate while covering the opening and which primarily include SiO2 and Al2O3, respectively, Al2O3 having oxygen defect and being in an amorphous state, and a piezoelectric thin film which is provided on the second insulation film and is sandwiched between electrodes and which primarily includes ZnO.
Murata Manufacturing Co., Ltd.
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Yukio Masaki Hajime Daisuke Hiroyuki Hideki Ken-ichi Tadashi Yoshimitsu Takashi
Yoshino Takeuchi Yamada Nakamura Fujino Kawamura Uesaka Nomura Ushimi Hayashi