Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Reexamination Certificate
2008-01-29
2008-01-29
Budd, Mark (Department: 2834)
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
C310S31300R
Reexamination Certificate
active
10296413
ABSTRACT:
A surface acoustic wave device that can operate in alternate-phase mode and single-phase mode, and thus generate surface acoustic waves at two different frequencies. The device is based on a piezoelectric film deposited on an elastic substrate, and includes an electrode layer patterned as two interdigital electrodes and electrical source (2). The device is operated in alternate-phase mode by connecting the two electrodes to different ends of an electrical source (22). The device is operated in single-phase mode by connecting the two electrodes to the same end of an electrical source.
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Cheng Shide
Gan Woon Siong
Kam Chan Hin
Lam Yee Loy
Zhou Yan
Acoustical Technologies Singapore Pte. Ltd.
Budd Mark
Godfrey & Kahn S.C.
Kees Nicholas A.
Nanyang Technological University
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