Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Michio Kadota0
Date of Patent
January 4, 2011
0Patent Application Number
122728410
Date Filed
November 18, 2008
0Patent Primary Examiner
Patent abstract
An acoustic wave device includes a piezoelectric substrate, IDT electrodes, temperature characteristic-improving layer, and frequency-adjusting layer arranged on the piezoelectric substrate in that order. The piezoelectric substrate has a negative temperature coefficient of frequency TCF. The temperature characteristic-improving layer is made of a material having a positive temperature coefficient of frequency TCF. The frequency-adjusting layer includes a glass thin-film having a velocity of transverse wave less than a velocity of transverse wave of the temperature characteristic-improving layer.
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