Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Reexamination Certificate
2005-08-26
2008-10-21
Budd, Mark (Department: 2834)
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
C310S31300R
Reexamination Certificate
active
07439648
ABSTRACT:
A surface acoustic wave device configured by forming an oxide layer2on a piezoelectric substrate1composed of a lithium tantalate single crystal or a lithium niobate single crystal and having weak pyroelectric properties having a lower oxygen content than a stoichiometric composition ratio, and forming thereon an IDT electrode3. There is no static destruction of a minute electrode due to the pyroelectric effect of the piezoelectric substrate having weak pyroelectric properties, and frequency characteristics are not degraded.
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Iioka Kiyohiro
Makibuchi Daisuke
Muraoka Kunihiko
Obara Ikuo
Budd Mark
Hogan & Hartson LLP
Kyocera Corporation
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