Title:
SURFACE ACOUSTIC WAVE ELEMENT AND PORTABLE TELEPHONE SET USING THE SAME
Document Type and Number:
WIPO Patent Application WO/1997/033368
Kind Code:
A1
Abstract:
A surface acoustic wave element comprising electrodes for propagating surface acoustic waves formed on a piezoelectric substrate made of lithium niobate or lithium tantalate. When the cut face and surface acoustic wave propagating direction of the piezoelectric substrate made of lithium niobate are expressed by Euler angles ('phi', , 'psi') and a range substantially equivalent to the angles, the 'phi', and 'psi' are respectively set at 0-86� or 95-180�, 73-118�, and 0-44�. In addition, when the cut face and surface acoustic wave propagating direction of the piezoelectric substrate made of lithium tantalate are expressed by Euler angles ('phi', , 'psi') and a range substantially equivalent to the angles, the 'phi', and 'psi' are respectively set at 0-87� or 91-180�, 80-120�, and 0-44�. Therefore, a high-performance surface acoustic wave element can be obtained.
Inventors:
SHIMIZU YASUTAKA (JP)
NISHIKATA ATSUHIRO
TONAMI SHIGETAKA
NISHIKATA ATSUHIRO
TONAMI SHIGETAKA
Application Number:
PCT/JP1997/000670
Publication Date:
September 12, 1997
Filing Date:
March 04, 1997
Export Citation:
Assignee:
SANYO ELECTRIC CO (JP)
SHIMIZU YASUTAKA (JP)
SHIMIZU YASUTAKA (JP)
International Classes:
H03H9/02; (IPC1-7): H03H9/145; H03H9/25; H03H9/64
Foreign References:
| JPH08316781A | 1996-11-29 |
Other References:
SHIGETAKA TONAMI, ATSUHIRO NISHIKATA, YASUTAKA SHIMIZU, "Study on Leakage Surface Acoustic Wave Propagating through LiTa03 and LiNb03 Substrates (in Japanese)", PREPRINTS OF THE 15TH SYMPOSIUM ON THE BASIC AND THE APPLICATION OF ULTRASONIC ELECTRONICS PB-12, pp. 185-186, (1994).
See also references of EP 0886375A4
See also references of EP 0886375A4
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