Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Takuya Owaki0
Takao Morita0
Date of Patent
December 9, 2008
Patent Application Number
11319404
Date Filed
December 29, 2005
Patent Primary Examiner
Patent abstract
A surface acoustic wave device has a piezoelectric substrate and an IDT formed on the piezoelectric substrate, and uses an excited wave as an SH wave. The piezoelectric substrate is a quartz plate in which a cut angle θ of a rotated Y-cut quartz substrate is set in the range of −65°≦θ≦−51° in a counter-clockwise direction from a crystal Z-axis and the propagation direction of a surface acoustic wave is set in the range (90°±5°) with respect to a crystal X-axis. The IDT is made of Ta or an alloyed metal containing Ta as the main component.
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