Surface acoustic wave excitation device
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 20, 2008
Grant Date -
Oct 25, 2007
app pub date -
Apr 17, 2007
filing date -
Oct 19, 2004
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
[Problems]To provide a surface acoustic wave excitation device for efficiently exciting the surface acoustic wave on the surface of a material such as glass having free size and shape for making mechanical vibration available.[Means to Solve the Problems]The surface acoustic wave excitation device according to the present invention comprises a non-piezoelectric member 30 such as glass, a piezoelectric member 20, interdigital transducers 11 interposed between the non-piezoelectric member 30 and the piezoelectric member 20, and pre-pressurizing means 42 for pressing the piezoelectric member 20 onto the non-piezoelectric member 30 by way of the interdigital transducers. Alternating voltage is applied to the interdigital transducers 11 for exciting the surface acoustic wave on the non-piezoelectric member 30. Standing waves are generated in the piezoelectric member 20 by applying alternating voltage to the interdigital transducers 11, thereby allowing alternating strains to propagate to the non-piezoelectric member 30 such as a glass substrate or the like by way of the electrodes 11 and exciting the surface acoustic wave for making mechanical vibration of the non-piezoelectric member 30 available.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully