Wave transmission lines and networks – Coupling networks – Electromechanical filter
Reexamination Certificate
2005-08-23
2005-08-23
Summons, Barbara (Department: 2817)
Wave transmission lines and networks
Coupling networks
Electromechanical filter
C333S195000, C333S133000, C310S31300R
Reexamination Certificate
active
06933810
ABSTRACT:
A surface acoustic wave device includes a piezoelectric substrate having a first surface on which comb-like electrodes are formed, and a second surface, and a support substrate joined to the second surface of the piezoelectric substrate. The piezoelectric substrate is made of lithium, tantalate, and the support substrate is made of sapphire. The following expressions being satisfied:in-line-formulae description="In-line Formulae" end="lead"?T/t<⅓ (1)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?T/λ>10 (2)in-line-formulae description="In-line Formulae" end="tail"?where T is a thickness of the piezoelectric substrate, t is a thickness of the support substrate, and λ is a wavelength of a surface acoustic filter, propagated along the first surface of the piezoelectric substrate.
REFERENCES:
patent: 4006438 (1977-02-01), Bennett
patent: 6198197 (2001-03-01), Yamanouchi et al.
patent: 6259186 (2001-07-01), Shibata et al.
patent: 6445265 (2002-09-01), Wright
patent: 6767749 (2004-07-01), Kub et al.
patent: 51-77154 (1982-11-01), None
patent: 6-56592 (1994-03-01), None
patent: 2516817 (1996-04-01), None
patent: 9-208399 (1997-08-01), None
patent: 11-55070 (1999-02-01), None
patent: 2001-285019 (2001-10-01), None
Y. Shibata et al.; “Piezoelectric LiNbO3 and LiTaO3 Films for SAW Device Applications”, 1996 IEEE Ultrasonics Symposium, vol. 1, Nov. 1996, pp. 247-254.
SAW Properties of SiO2/128* Y-X LiNb03 Structure Fabricated by Magnetron Sputtering Technique Kazuhiki Yamanouchi, Member IEEE, and Satoshi Hayama, IEEE Transactions on Sonics and Ultrasonics, vol. SU-31, No. 1, Jan. 1984, pp. 51-57.
Temperature Stable SAW Devices Using Directly Bonded LiTa03/Glass Substrates H. Sato, K. Onishi, T. Shimamura and Y. Tomita, 1998 IEEE Ultrasonics Symposium, vol. 1, Oct. 1998, pp. 335-338.
Theoretical Analysis of SAW Propagation Characteristics under the Strained Medium and Applications for High Temperature Stable High Coupling SAW Substrates K. Yamanouchi, K. Kotani, H. Odagawa, and Y. Cho, 1999 IEEE Ultrasonics Symposium, vol. 1, Jul. 2000, pp. 471-474.
Matsuda Takashi
Miura Michio
Satoh Yoshio
Ueda Masanori
Arent & Fox PLLC
Fujitsu Limited
LandOfFree
Surface acoustic wave device with lithium tantalate on a... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Surface acoustic wave device with lithium tantalate on a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Surface acoustic wave device with lithium tantalate on a... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3510539