OST Photonics offers a variety of sizes and thicknesses of SAW grade Lithium Tantalate (LiTaO3) wafers, with wafer diameters ranging from 3 inches to 6 inches, the thickness can be customized according to your requirements (generally above 0.18 mm). The orientations can be X/Y/Z/X112Y/Y36/Y42/Y48 etc. SAW grade pyroelectric free black lithium tantalate wafers(LiTaO3 wafers) and Fe doped LiTaO3 are also available upon request.
RF type SAW devices
High frequency filters
pyroelectric detectors.
Stable mechanical properties
Stable chemical properties
High optical damage threshold
Good piezoelectric and pyroelectric properties
Diameter: 3”, 4”, 6”
Orientations: X, Y, Z, X112Y, Y36, Y42, Y48, etc.
Thickness: 0.25mm, 0.35 mm, 0.5 mm, 1.0 mm etc.
Available items: crystal wafers, black reduced wafers, Fe doped LiTaO3 wafers, boules, blanks and customized optics
Material | LiTaO3 single crystal | |
Curie Temp | 603±2.0℃ | |
Reduction | Standard Black - 0.9E+11 ~ 9.0E+11 Super Black - 1.0E+10 ~ 9.0E+10 | |
Cutting Angle | X/Y/Z/X112Y/Y36/Y42/Y48 etc | |
Orientation Tolerance (±) | ≤15′ | |
Diameter | 3”/4”/6” | |
Diameter Tolerance (±) | ≤0.20 mm | |
Thickness | 0.18 ~ 0.5mm or more | |
Thickness Tolerance (±) | ≤0.025 mm | |
Primary Flat Length | 22mm/32mm/42.5mm | |
LTV (5mmx5mm) | <1.5 µm | |
TTV | <1~5 µm | |
BOW | ± (25~40 um) | |
Warp | <= 35 µm | |
PLTV(<0.5um) | ≥98%(5mm*5mm) with 2mm edge excluded | |
Orientation Flat | According to our standards or your requests | |
Surface Type | Single side polished(SSP)/double sides polished(DSP) | |
Polished Side Ra | <0.5nm | |
Back Side Criteria | General is 0.2-0.5 um or as customized | |
Edge Criteria | Compliant with SEMI M1.2 Standard/refer to IEC62276 | |
Fe doped | Fe doped for saw grade LiNbO3 wafers | |
Wafer Surface Criteria | Transmissivity | General:5.9x10^-11<s<2.0*10^-10 at 25℃ |
Contamination | None | |
Particles φ>0.3 um | <= 30 | |
Scratch , Chipping | None | |
Defect | No edge cracks, scratches, saw marks, stains | |
Packaging | Qty/Wafer box | 25pcs per box |
Material | Grade | Diameter | Growth direction |
LiTaO3 | SAW | 3”/4”/6” | X/Y/Z/X112Y/Y36/Y42/Y48 etc |
Fe:LiTaO3 | SAW | 3”/4”/6” | X/Y/Z/X112Y/Y36/Y42/Y48 etc |
Crystal Structure | Trigonal, Space group R3c, Point group 3m |
Lattice Constant | a=5.154Å, c=13.781Å |
Melting Point | 1650℃ |
Curie Temperature | 603℃ |
Mohs Hardness | 5.5 |
Density | 7.46g/cm3 |
Dielectric Constants | ε11/ε0:51.7 |
ε33/ε0:44.5 | |
Elastic Stiffness Coefficients | CE11:2.33(x10^11 N/m2) |
CE33:2.77(x10^11 N/m2) | |
Piezoelectric Strain Constants | d22:2.4(x10^-11 C/N) |
d33:0.8(x10^-11 C/N) | |
Transmission range | 400-4500 nm |
Electro-optical coefficients | r33=30.4pm/V |
Refractive index at 632.8nm | no=2.176, ne=2.180 |
