Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
SURFACE ACOUSTIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2005/099089
Kind Code:
A1
Abstract:
A SAW device employing a quartz substrate having device size smaller than that of conventional structure and exhibiting a high Q and excellent frequency-temperature characteristics. An IDT (2) consisting of a plurality of interdigital electrode fingers is mounted on a piezoelectric substrate (1) and grating reflectors (3a, 3b) are arranged on the both sides of the IDT (2). The piezoelectric substrate (1) is a flat quartz plate where the cut angle Ѳ of a rotary Y-cut quartz substrate is set in the range of -64.0&ring <Ѳ < -49.3&ring in the counter clockwise direction from the crystal Z-axis and the propagating direction of surface acoustic wave is set at 90&ring ± 5&ring with respect to the crystal X-axis, and the exciting acoustic wave is SH wave. The IDT (2) and the reflectors (3a, 3b) are composed of Al or an alloy principally comprising Al and the electrode film thickness standardized by wavelength H / &lgr is set in the range of 0.04 < H / &lgr < 0.12, where &lgr is the wavelength of surface acoustic wave.

More Like This:
JP2005057666METHOD FOR MANUFACTURING SURFACE ACOUSTIC WAVE CHIP, SURFACE ACOUSTIC WAVE CHIP MANUFACTURED BY THE MANUFACTURING METHOD AND SURFACE ACOUSTIC WAVE DEVICE
JP3643497MANUFACTURE OF SURFACE ACOUSTIC WAVE ELEMENT
JP6716838Methods for manufacturing substrates
Inventors:
MORITA TAKAO (JP)
OHWAKI TAKUYA (JP)
Application Number:
PCT/JP2005/003998
Publication Date:
October 20, 2005
Filing Date:
March 08, 2005
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
TOYO COMMUNICATION EQUIP (JP)
MORITA TAKAO (JP)
OHWAKI TAKUYA (JP)
International Classes:
H03H3/10; H03H9/02; H03H9/145; H03H9/25; H03H9/64; (IPC1-7): H03H9/145; H03H3/10; H03H9/25; H03H9/64
Foreign References:
JPH0746079A1995-02-14
JP2004007846A2004-01-08
JPH09275323A1997-10-21
JP2004023254A2004-01-22
JPH07198428A1995-08-01
JP2003204245A2003-07-18
JP2004007846A2004-01-08
JP2001068959A2001-03-16
JPS5833309A1983-02-26
JPH0134411B21989-07-19
Other References:
See also references of EP 1732216A4
Attorney, Agent or Firm:
Suzuki, Hitoshi (2nd Floor 6-5, Arai 2-chom, Nakano-ku Tokyo, JP)
Download PDF:
View/Download PDF      PDF Help



 
Previous Patent: A μ-FLAP TYPE NANO/MICRO MECHANICAL DEVICE AND FABRICATION METHOD THEREOF

Next Patent: ELASTIC BOUNDARY WAVE FILTER