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Flexible ultrasonic transducer (UT) arrays consisting of a thin substrate, a bottom electrode if the substrate is an insulator, a piezoelectric composite ceramic layer and a top electrode with a total thickness less than 100 mum have been produced. A stainless steel foil, aluminum foil and polyimide film were used as a substrate. On top of the polyimide film a thin (<1 mum thick) nickel alloy layer...
This paper describes the first demonstration for feeding back the results obtained by the line-focus-beam ultrasonic material characterization (LFB-UMC) system to the crystal growth conditions for optical-grade LiTaO/sub 3/ crystals and for achieving much improved homogeneity of chemical composition. We evaluated a commercially available optical-grade LiTaO/sub 3/ single crystal with a nominally congruent...
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