Journal ArticleDOI
SAW resonator and resonator filter on Li2B4O7 substrate
Yasuo Ebata,Masayoshi Koshino +1 more
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TLDR
In this paper, Li2B4O7 single crystal has attracted attention as a piezoelectric substrate for SAW devices and its application to a SAW resonator is discussed.Abstract:
Lithium tetraborate (Li2B4O7) single crystal has attracted attention as a piezoelectric substrate for SAW devices. This paper focuses on its application to a SAW resonator. Reflection characteristics for aluminum strips and configuration suppressing surface-to-bulk-wave conversion are discussed. Results prove that the strips on Li2B4O7 substrate reflect efficiently, compared with those on the other substrates, and that a newly developed configuration improves the resonator Q at least twice. Further, a low insertion loss of 2.5 dB is achieved for a paging receiver filter.read more
Citations
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PatentDOI
Surface Acoustic Wave Device
TL;DR: In this paper, a surface acoustic wave device consisting of a piezoelectric substrate and first and second comb-shaped electrodes each having a bus-bar portion parallel to a propagation direction of a surface acoustic wave in the substrate is described.
Journal ArticleDOI
Growth of ∅4″ Li2B4O7 single crystals by multi-crucible Bridgman method
Jiayue Xu,Shiji Fan,Baoliang Lu +2 more
TL;DR: In this article, a multi-crucible Bridgman furnace was developed for industrial growth of 4-inch diameter Li 2 B 4 O 7 (LBO) single crystals and 3-6 boules can be grown in the furnace at the same time.
Proceedings ArticleDOI
A 45° X Cut Li 2 B 4 O 7 Single Crystal Substrate for SAW Resonators
TL;DR: In this paper, Li et al. have shown how a 45' X-cut algorithm can be used on a 280 MHz wideband SAW, and they have shown that it can be applied to any SAW more than once.
Journal ArticleDOI
The pressure and temperature dependences of the elastic behaviour of lithium tetraborate
TL;DR: In this article, the authors measured the velocities of selected ultrasonic modes in monocrystalline lithium tetraborate (Li 2 B 4 O 7 ) and obtained the temperature dependences of each component of the elastic stiffness tensor between 4.2 and 300 K.
Proceedings ArticleDOI
Properties, production and application of new piezoelectric crystal lithium tetraborate Li/sub 2/B/sub 4/O/sub 7/
TL;DR: In this paper, the growth and production of LBO crystal by the modified Bridgman (BR) technique (Fan's process) and its application to SAW and BAW devices are also discussed.