Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Reexamination Certificate
2006-01-17
2006-01-17
Schuberg, Darren (Department: 2834)
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
C310S365000, C310S344000, C310S348000, C310S325000, C310S366000
Reexamination Certificate
active
06987347
ABSTRACT:
A piezoelectric resonator component includes an energy-trapped piezoelectric resonator utilizing a third order harmonic wave of thickness longitudinal vibration and including a piezoelectric substrate having first and second major surfaces and polarized in a direction of thickness between the first and second major surfaces, and first and second vibrating electrodes opposed to each other with the piezoelectric substrate interposed therebetween, and first and second casing substrates respectively laminated on the first and second major surfaces of the piezoelectric resonator so that cavities are arranged so as not to interfere with vibration of a vibration section where the first and second vibrating electrodes face each other through the piezoelectric substrate. The first and second vibrating electrodes are dimensioned so that the difference between the peak values of the phases of S0 and S1 modes of the fundamental wave of the thickness longitudinal vibration falls within a range of about ±5 degrees.
REFERENCES:
patent: 6232699 (2001-05-01), Wajima
patent: 19922146 (1999-05-01), None
patent: 08-148967 (1996-06-01), None
patent: 2003-087077 (2003-03-01), None
Kotani Kenichi
Yamada Mitsuhiro
Yoshio Masakazu
Aguirrechea J.
Keating & Bennett LLP
Murata Manufacturing Co. Ltd.
Schuberg Darren
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