Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Reexamination Certificate
2011-06-07
2011-06-07
SanMartin, J. (Department: 2837)
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
Reexamination Certificate
active
07956511
ABSTRACT:
A surface acoustic wave device includes a LiNbO3substrate and is constructed such that a reflection coefficient of an IDT is not only high but the electromechanical coupling coefficient K2is also high, and the range of Euler angles of the LiNbO3substrate which obtains a wide range of the electromechanical coupling coefficient K2is increased. A plurality of grooves are provided in the upper surface of the LiNbO3substrate, and an IDT including a plurality of electrode fingers is provided and defined by a metal material filled in the plurality of grooves, and the metal material is made of Ag, Ni, or Cr or an alloy primarily including at least one Ag, Ni, or Cr.
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Kadota et al.; “Surface Acoustic Wave Device”; U.S. Appl. No. 12/825,520, filed Jun. 29, 2010.
Kadota Michio
Kimura Tetsuya
Keating & Bennett LLP
Murata Manufacturing Co. Ltd.
SanMartin J.
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