Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Reexamination Certificate
2003-12-16
2008-12-30
Budd, Mark (Department: 2834)
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
C310S31300R
Reexamination Certificate
active
07471027
ABSTRACT:
A boundary acoustic wave device includes a dielectric substance that is laminated on one surface of a piezoelectric substance, an IDT and reflectors used as electrodes are disposed at a boundary between the piezoelectric substance and the dielectric substance, and the thicknesses of the electrodes are set such that the acoustic velocity of the SH type boundary acoustic wave is less than that of a slow transverse wave propagating in the dielectric substance and than that of a slow transverse wave propagating in the piezoelectric substance, so that a boundary acoustic wave device is formed.
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Budd Mark
Keating & Bennett LLP
Murata Manufacturing Co. Ltd.
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