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Large Diameter 8 inch LiNbO3 wafers 128°Y-cut and Z-cut For Surface Acoustic Wave Devices
Lithium Niobate (LiNbO3) is colorless or slightly yellowish translucent crystal, with R3C hexagonal structure, density of 4.64×10^3kg/m3, Mohs hardness of 5~5.5, melting point of 1253℃, Curie temperature at 1210℃. Lithium niobate single crystal is a kind of ferroelectric with high electromechanical coupling coefficient and low propagation loss, which can be used to make surface acoustic wave (SAW) devices with bandwidth up to 50%. The surface acoustic wave (SAW) properties of LiNbO3 single crystal materials are closely related to its orientation and propagation direction. According to the different cut angle and propagation direction, its SAW propagation velocity is 3400~4000m/s, the electromechanical coupling coefficient is 0%~5.6%, and the temperature coefficient is -1.1~-95.6 (10^-6/℃).
The development target of Lithium Niobate (LiNbO3) as the next generation SAW and optical material is always to produce larger diameter wafers to meet manufacturer’s requirements. BonTek sees the trend and shares the value, introducing 8 inch LN wafers for 128°Y-cut and Z-cut, 6 inch LN wafers for all cut angles!
Material | 8" Lithium Niobate wafer |
Orientation | Z-cut or Y128°-cut |
Surface finish | Single or Double sides polish (DLP/SLP/ SSP/DSP all available ) |
Thickness | 0.35mm, 0.50mm, 1.00mm |
TTV | < 5µm |
BOW | ± 40um |
Warp | < 80µm |
Orientation flats | Semi Standard Notch |
Polished side Ra | Roughness Ra<10A |
Back Side Criteria | Roughness Ra:0.5-1.0µm GC#1000 |
Edge Rounding | Compliant with SEMI M1.2 Standard/refer to IEC62276 |
Crystal Sturucture | Trigonal, Space group R3c, Point group 3m |
Melting Point | 1253℃ |
Mohs Hardness | 5 |
Density | 4.64g/cm3 |
Deliquescence | None |
Optical Homogeneity | ~5x10-5/cm |
Transparency Range | 420-5200nm |
Absorption Coefficient | ~0.1%/cm @1064nm |
Refractive Indices @1064nm | ne=2.146, no=2.220@1300nm ne=2.156, no=2.232@1064nm ne=2.203, no=2.286@632.8nm |
Thermal Expansion Coefficients (at 25℃ ) | //a,2.0x10-6/K //a,2.2x10-6/K |
Thermal Conductivity Coefficients | 38 W/m/K at 25℃ |
Thermal Optical Coefficients | dno/dT=-0.874 x 10-6/K at 1.4μm dne/dT=39.073 x 10-6/K at 1.4μm |
The Sellmeier Equations (λ in μm) | no2=4.9048+0.11768/(λ2-0.04750)-0.027169λ2 ne2=4.5820+0.099169/(λ2-0.04443)-0.02195λ2 |
FAQs:
A: We look at ourselves as the piezo wafer specialist. We are the very first to work with Single Crystal Quartz in China about 30 years ago. Then gradually we step in the field of LiNbO3, LiTaO3, Quartz glass, LGS, CTGS etc. Especially, if you are looking for a piezo quartz supplier, we are the ultimate choice! We export millions of quartz blanks each year because we master the AT, SC and IT cuts with superior angle precision.
A: Yes, of course. We can fabricate as per your request. In addition, we are so experienced with piezo wafers that we can provide you relevant suggestions if you are not 100% sure about your choice. Besides, we do have some standard wafers in stock, please check with us.
A: Yes, we would suggest you go with the courier agent you are most familiar with (DHL, FedEX, UPS etc.). We can ship via your account. And, of course, we will pack the products safely in acceptable size to help you save the shipping cost. If you need us to take care of the freight, it’s also not a problem. We also have good discount with the international courier companies.
A: The wafer products are fragile and sometimes expensive. The last thing, as the manufacturer, we want to see is the products we make were damaged during courier. As a result, we will pack the wafers adequately and put them in a proper carton filled with buffer sponge. However, accidents are inevitable sometimes. So, please follow the “Acceptance check” steps shown in the drawings below. If the unwanted happened, we will either give the replenishment or refund if you follow the checking steps.
A: Sure. Factory inspection is important for large quantity purchase and long-term cooperation. Face to face discussion is what we mostly confident with. During the past years, big names around the world have witnessed our progress in factory build-up. These days, due to the Covid-19 pandemic, we also had the experience of videoconferencing with global buyers.
Acceptance Check
