Metal working – Piezoelectric device making
Reexamination Certificate
2007-07-10
2007-07-10
Tugbang, A. Dexter (Department: 3729)
Metal working
Piezoelectric device making
C029S594000, C029S830000, C029S831000, C029S832000, C029S846000, C029S847000, C310S324000
Reexamination Certificate
active
11094622
ABSTRACT:
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 SiO2and Al2O3, respectively, Al2O3having 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.
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Official Communication issued in corresponding Japanese Patent Application No. 2002-338036, dated Sep. 5, 2006.
Official Communication issued in corresponding Japanese Patent Application No. 2002-338037, dated Sep. 5, 2006.
Fujino Hiroyuki
Hayashi Takashi
Kawamura Hideki
Nakamura Daisuke
Nomura Tadashi
Keating & Bennett LLP
Murata Manufacturing Co. Ltd.
Nguyen Tai Van
Tugbang A. Dexter
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