US Patent 7863801 Acoustic wave device
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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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Patent Inventor Names
Michio Kadota0
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US Patent 07863801 Acoustic wave device US Patent 7863801 Acoustic wave device
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Patent Number
078638010
Patent Number
78638010
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Patent Jurisdiction
Patent Number
078638010
Date of Patent
January 4, 2011
0Patent Application Number
122728410
Date Filed
November 18, 2008
0Official Website
Patent Primary Examiner
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US Patent 07863801 Acoustic wave device
Infobox
Is a
Patent jurisdiction
Patent number
07863801
Date of patent
January 4, 2011
Patent application number
12272841
Date Filed
November 18, 2008
Patent primary examiner
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