Lithium Tantalate Wafers
Lithium tantalate (LiTaO3), has properties which make it useful for SAW (surface acoustic wave) devices and, to a different specification, for optical use. Wafers can be produced with varying properties, such as "black" wafers free of pyroelectric discharge, 4" (100mm), orientation 36°, 39°, 42 °, 46°, 48°, X-CUT detailed specifications, or with higher physical strength to withstand processing during manufacture, resulting in higher yields.
Standard Lithium Tantalate Applications
Typical Specifications (for SAW use)
| Orientation | Diameter | Reference Flat Perpendicular to | Thickness | Surface Finish | ||
|---|---|---|---|---|---|---|
36° Y - Cut |
76.2 ± 0.7 (mm) |
22 ± 3 (mm) |
X |
0.35 ± 0.03 (mm) |
Front |
Mirror Polished |
42° Y - Cut |
X |
0.50 ± 0.03 (mm) |
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X - Cut |
100.0 ± 0.7 (mm) |
32 ± 3 (mm) |
Parallel to 112.2° Y |
0.50 ± 0.03 (mm) |
Back |
Ground |
LiTaO3
Typical Specifications (for Optical use)
| Orientation | Diameter | Reference Flat Perpendicular to | Sub Flat | Thickness | Surface Finish | |||
|---|---|---|---|---|---|---|---|---|
Z - Cut |
50.8 ± 0.7 (mm) |
21 ± 3 (mm) |
Y |
10 ± 3(mm) |
- X |
0.50 ± 0.03 (mm) |
Front |
Mirror Polished |
Back |
Lithium Tantalate Optical Wafer
