Growth and properties of Φ3" ⟨011⟩ LBO crystal for leaky SAW devices

Author

Fan, Shi-ji ; Xu, Jia-Yue ; Sun, Ren-ying ; Zhang, Guang-Yu

Author_Institution

Inst. of Ceramics, Acad. Sinica, Shanghai, China

fYear

1996

fDate

5-7 Jun 1996

Firstpage

118

Lastpage

121

Abstract

Φ3" ⟨011⟩ LBO crystals have been grown successfully by the modified Bridgman (BR) technique. The feature of ⟨011⟩ LBO growth is to form easily laminar twinning parallel to (100) face and ⟨011⟩ growth direction. The laminar twins can be increased in thickness and size of them or disappear from periphery of LBO boule. Twin-free Φ3" ⟨011⟩ LBO crystal can be grown by careful preparation of seed crystal and maintenance of stable growth conditions. (011) cut of BR-LBO substrate has phase velocity of longitudinal leaky surface acoustic wave (LLSAW) 6676 m/s, coupling coefficient k² 2.8%, propagation loss 0.0083 dB/λ, which indicates (011) cut of LBO substrate is suitable for high frequency device fabrication

Keywords

acoustic wave absorption; acoustic wave propagation; crystal growth from melt; lithium compounds; surface acoustic wave devices; Li₂B₄O₇; coupling coefficient; high frequency device fabrication; laminar twinning; leaky SAW devices; modified Bridgman technique; phase velocity; propagation loss; seed crystal; surface acoustic wave; Acoustic waves; Crystallography; Crystals; Fabrication; Frequency; Global Positioning System; Propagation losses; SAW filters; Shape; Surface acoustic wave devices;

fLanguage

English

Publisher

ieee

Conference_Titel

Frequency Control Symposium, 1996. 50th., Proceedings of the 1996 IEEE International.

Conference_Location

Honolulu, HI

Print_ISBN

0-7803-3309-8

Type

conf

DOI

10.1109/FREQ.1996.559829

Filename

559829