Piezoelectric vibrating piece and piezoelectric vibrating...

Details Piezoelectric vibrating piece and piezoelectric vibrating... Piezoelectric vibrating piece and piezoelectric vibrating...

2007-12-13

2009-08-25

Dougherty, Thomas M (Department: 2834)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C310S363000, C310S346000

Reexamination Certificate

active

07579762

ABSTRACT:
A piezoelectric vibrating piece having a first and a second surface at an opposing side of the first surface is comprised of an piezoelectric piece having designated coefficient of thermal expansion; a first electrode film having bigger coefficient of thermal expansion than the designated coefficient of thermal expansion and formed on the first surface; and a second electrode film having smaller coefficient of thermal expansion than the designated coefficient of thermal expansion and formed on the second surface.

REFERENCES:
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patent: 7408428 (2008-08-01), Larson, III
patent: 2006/0006965 (2006-01-01), Ishii
patent: 2007/0040860 (2007-02-01), Chou et al.
patent: 2007/0152775 (2007-07-01), Fujii et al.
patent: 07-131086 (1995-05-01), None
patent: 09-238045 (1997-09-01), None
patent: 2003-017977 (2003-01-01), None
patent: 2003-198312 (2003-07-01), None
patent: 2006-352619 (2006-12-01), None

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