Wave transmission lines and networks – Coupling networks – Electromechanical filter
Reexamination Certificate
2006-02-28
2006-02-28
Summons, Barbara (Department: 2817)
Wave transmission lines and networks
Coupling networks
Electromechanical filter
C333S150000, C310S31300R, C331S1160FE
Reexamination Certificate
active
07005947
ABSTRACT:
A surface acoustic wave element includes a single crystal substrate; a buffer layer formed by a crystal film that is formed on top of the single crystal substrate; and a piezoelectric thin film having a hexagonal system or a trigonal system crystal structure that is formed on top of the buffer layer. The surface acoustic wave element has an improved performance by improving the film quality of the piezoelectric thin film. In addition, because a semiconductor device can be formed on the single crystal substrate, the surface acoustic wave element can be integrated with the semiconductor device. Moreover, leakages of surface acoustic waves into the single crystal substrate are prevented. There are also provided a frequency filter, an oscillator, an electronic circuit, and an electronic instrument that are provided with this surface acoustic wave element.
REFERENCES:
patent: 6045626 (2000-04-01), Yano et al.
patent: 6198208 (2001-03-01), Yano et al.
patent: 6258459 (2001-07-01), Noguchi et al.
patent: 6555946 (2003-04-01), Finder et al.
patent: 6583690 (2003-06-01), Lee et al.
patent: 6855996 (2005-02-01), Noguchi et al.
patent: 2003/0011280 (2003-01-01), Nakahata et al.
patent: 01-103310 (1989-04-01), None
patent: 06-120416 (1994-04-01), None
patent: 07-050436 (1995-02-01), None
patent: 2001-196892 (2001-07-01), None
patent: 2003-017981 (2003-01-01), None
Patent Abstracts of Japan, 2001-196892 (2 pages), Jul., 2001.
Patent Abstracts of Japan. 2003-017981 (2 pages), Jan. 2003.
Patent Abstracts of Japan, 07-050436 (2 pages), Feb. 1995.
Patent Abstracts of Japan, 01-103310 (2 pages), Apr. 1989.
Patent Abstracts of Japan, 06-120416 (2 pages), Apr. 1994.
Shibata, Yoshihiko et al, Epitaxial growth and surface-acoustic-wave properties of LiTaO3 films grown by pulsed laser deposition, Appl Phys Letter 62, Jun. 7, 1993, pps. 3046-3048.
Higuchi Takamitsu
Iwashita Setsuya
Miyazawa Hiromu
Seiko Epson Corporation
Summons Barbara
LandOfFree
Surface acoustic wave element, frequency filter, oscillator,... 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 element, frequency filter, oscillator,..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Surface acoustic wave element, frequency filter, oscillator,... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3651353