Black Pyroelectric Free LiNbO3 Wafer 8 Inch 128Y-cut for SAW IDT Applications with 1142°C Curie Temperature
Black Pyroelectric Free Lithium Niobate (LiNbO3) wafers are specialized ferroelectric materials engineered for high-frequency surface acoustic wave (SAW) device applications. These 8-inch 128Y-cut wafers feature exceptional electro-optic, nonlinear, and piezoelectric properties.
The reduction process creates black lithium niobate with superior charge neutralization capabilities, even under instantaneous electric potential. This technology virtually eliminates pyroelectric effects while maintaining the same piezoelectric performance as standard wafers, making them ideal for advanced SAW devices.
BonTek offers black LN wafers in 3", 4", 6", and 8" diameters for all cutting angles, including 128°Y and Z-cuts.
| Parameter | Specifications |
|---|---|
| Material | 3" 4" 6" 8" LN wafer SAW/Optical grade |
| Orientation | X/Z/Y41°/Y64°/Y128°/YZ/YX or Customized |
| Curie Temperature | 1142°C±3°C |
| Reduction Levels | Standard Black: 0.9E+11 ~ 9.0E+11 Super Black: 1.0E+10 ~ 9.0E+10 |
| Surface Finish | Single or double sides polish (DLP/SLP/SSP/DSP available) |
| Thickness | 0.18/0.25/0.35/0.50/1.00+ mm |
| TTV | < 1~5µm |
| BOW | ± (25µm ~40µm) |
| Warp | <= 35µm |
| LTV (5mmx5mm) | <1.5 µm |
| PLTV (<0.5µm) | ≥98% (5mm*5mm) with 2mm edge excluded |
| Property | Value |
|---|---|
| Melting Point | 1253°C |
| Crystal System | Trigonal |
| Point Group | 3m |
| Crystal Density | 4.647 x 10³ kg/m³ |
| Curie Temperature (Tc) | 1150°C |
| Heat Capacity (Cp) | 89 J/k.mol |
| Dielectric Constants | T11=85.2 T33=28.7 |
| Elastic Constants | CE11=2.03 x 10¹¹ N/m² CE12=0.573 CE13=0.752 CE14=0.085 CE33=2.424 CE44=0.595 |
| Piezoelectric Strain Constants | e15=3.7 C/m² e22=2.5 e31=0.23 e33=1.33 |
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