Growth and properties of /spl Phi/3" <011> LBO crystal for leaky SAW devices
/spl Phi/3" <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 /spl Phi/3" <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 k/sup 2/ 2.8%, propagation loss 0.0083 dB//spl lambda/, which indicates (011) cut of LBO substrate is suitable for high frequency device fabrication.