Surface acoustic wave device having a polarization inverted...

Details Surface acoustic wave device having a polarization inverted... Surface acoustic wave device having a polarization inverted...

2005-06-07

2005-06-07

Summons, Barbara (Department: 2817)

Wave transmission lines and networks

Coupling networks

Electromechanical filter

C333S195000, C310S31300R, C310S357000

Reexamination Certificate

active

06903630

ABSTRACT:
A surface acoustic wave device includes multiple SAW resonators formed on a piezoelectric substrate and connected in a ladder arrangement, the piezoelectric substrate having a polarization inverted region on which either a series-arm resonator or a parallel-arm resonator is formed.

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K. Nakamura et al.; “Effect of a Ferroelectric Inversion Layer on the Temperature Characteristics of SH-Type Surface Acoustic Waves on 36° Y-X LiTaO3Substrates”; IEEE Trans. on Ultrasonics, Ferroelectrics, and Freq. Control, vol. 41, No. 6, pp. 872-875, Nov., 1994.
“Theoretical Analysis of SAW Propagation Characteristics under the Strained Medium and Applications for High Temperature Stable High Coupling SAW Substrates,” K. Yamanouchi et al., IEEE Trans. On Sonics and Ultrasonics, vol. SU-31, pp. 51-57, 1984.
“Temperature Stable SAW Devices Using Directly Bonded LiTaO3/Glass Substrates,” Proc. Of IEEE Ultrasonics Symposium, pp. 335-338, 1998.
“SAW Properties of SiO2/128° Y-K LiNbO3Structure Fabricated by Magnetron Sputtering Technique,” Yamanouchi et al., The 20th Symposium, Nov., 1999.

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