Metal working – Piezoelectric device making
Reexamination Certificate
2005-11-08
2005-11-08
Tugbang, A. Dexter (Department: 3729)
Metal working
Piezoelectric device making
C029S830000, C029S831000, C029S847000, C216S046000
Reexamination Certificate
active
06961981
ABSTRACT:
The invention concerns a piezoelectric resonator piece of a piezoelectric resonator having electrode patterns for forming exciting electrodes each of which is composed of an under a metal layer. Each of the electrode patterns for forming conduction electrodes is composed of the under metal layer except the curved or bent portions of the sides of the piezoelectric resonator piece and each of the electrode patterns in these portions are composed of the under metal layer and a gold electrode layer. It is thus possible to provide a piezoelectric resonator in which, even when noble metal layers are partially removed for increasing adhesion of surface protecting films, exciting electrodes are not brought into an open state between the upper side and the lower side of a piezoelectric resonator piece.
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Kasuga Yoshiharu
Nagai Mitsuru
Nguyen Tai Van
Oliff & Berridg,e PLC
Seiko Epson Corporation
Tugbang A. Dexter
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