Title:
SURFACE ACOUSTIC WAVE DEVICE
Document Type and Number:
WIPO Patent Application WO/2013/061926
Kind Code:
A1
Abstract:
Provided is a surface acoustic wave device wherein it is possible to adjust the band width without connecting an additional capacitance and the propagation loss is sufficiently low. A surface acoustic wave device (1) wherein multiple surface acoustic wave elements (2, 3) are formed using a piezoelectric body (4) having the same cut angle, the propagation direction (X1) of the surface acoustic waves of at least one of the surface acoustic wave elements (2) is different from the propagation direction (X2) of the surface acoustic waves of the other surface acoustic wave element (3), and a confinement layer (12) for confining the surface acoustic waves on the side of the piezoelectric body (4) is formed on the surface of the surface acoustic wave elements (2, 3) that is on the opposite side of the electrode formation surface of the piezoelectric body (4).
Inventors:
KANDO HAJIME (JP)
OKADA KEIJI (JP)
OKADA KEIJI (JP)
Application Number:
PCT/JP2012/077243
Publication Date:
May 02, 2013
Filing Date:
October 22, 2012
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H03H9/25; H01L41/09; H01L41/18; H03H9/145; H03H9/64
Domestic Patent References:
| WO2009119007A1 | 2009-10-01 | |||
| WO2005060094A1 | 2005-06-30 | |||
| WO2007007475A1 | 2007-01-18 | |||
| WO2003088483A1 | 2003-10-23 | |||
| WO2005060094A1 | 2005-06-30 |
Foreign References:
| JPH02311007A | 1990-12-26 | |||
| JPH07283688A | 1995-10-27 | |||
| JPH0865089A | 1996-03-08 |
Other References:
See also references of EP 2773040A4
Attorney, Agent or Firm:
MIYAZAKI & METSUGI (JP)
Patent business corporation Miyazaki and table-of-contents patent firm (JP)
Patent business corporation Miyazaki and table-of-contents patent firm (JP)
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Claims:
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