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) | ||||
| 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 | Front | Mirror Polished | |
Lithium Tantalate Optical Wafer
Reproduced by kind permission of Yamaju Ceramics Co., Ltd.
© Yamaju 2004 Specifications subject to change without notice. All rights reserved.
