| Code | Size | Thickness | Orientation | Surface Finish | Unit Price | Delivery | Cart |
|---|---|---|---|---|---|---|---|
| 642-001 | 5x5mm | 0.5mm | <100> | SSP | Inquire | 2 weeks | |
| 642-002 | 5x5mm | 0.5mm | <100> | DSP | Inquire | 2 weeks | |
| 642-003 | 5x5mm | 0.5mm | <110> | SSP | Inquire | 2 weeks | |
| 642-004 | 5x5mm | 0.5mm | <111> | SSP | Inquire | 2 weeks | |
| 642-005 | 10x10mm | 0.5mm | <100> | SSP | Inquire | 2 weeks | |
| 642-006 | 10x10mm | 0.5mm | <100> | DSP | Inquire | 2 weeks | |
| 642-007 | 10x10mm | 0.5mm | <110> | SSP | Inquire | 2 weeks | |
| 642-008 | 10x10mm | 0.5mm | <111> | SSP | Inquire | 2 weeks | |
| 642-009 | Φ12.7mm | 0.5mm | <100> | SSP | Inquire | 2 weeks | |
| 642-010 | Φ12.7mm | 0.5mm | <100> | DSP | Inquire | 2 weeks | |
| 642-011 | Φ20mm | 0.5mm | <100> | SSP | Inquire | 2 weeks | |
| 642-012 | Φ20mm | 0.5mm | <100> | DSP | Inquire | 2 weeks | |
| 642-013 | Φ25.4mm | 0.5mm | <100> | SSP | Inquire | 2 weeks | |
| 642-014 | φ25.4mm | 0.5mm | <100> | DSP | Inquire | 2 weeks |
Strontium Titanate or SrTiO3 (STO) single crystal provides a good lattice match to most materials with Perovskite structure. It is an excellent substrate for epitaxial growth of HTS (High Temperature Superconductor) and many oxide thin films. Its lattice constant (3.905Å) fits the common high Tc superconductive material YBCO (3.88 Å) very well. It has twin-less crystal structure and very good physical and mechanical properties for film growth. It is suitable for various high Tc films such as YBCO, Bi-system, La-system and others. SrTiO3 is an excellent and wide applied High Tc superconductive single crystalline substrate. SrTiO3 single crystal has also been used widely for special optical windows and as high quality sputtering target. It is also suitable for different film growth technologies such as Magnet Sputtering, Pulsed Laser Deposition (PLD), Vapourization, MOCVD, CVD, and laser MBE etc. Films made by these materials and technologies on SrTiO3 wafers have excellent performance, for instance Tc>90K, Jc> = 106A/cm2.
Hangzhou Shalom EO provides both stocked standard SrTiO3 (or STO) wafers and customs wafers.
Common Specifications:
| Materials | SrTiO3 crystals | Orientations | ＜100＞,＜110＞,＜111＞ |
| Orientation Error | ±0.5° | Maximum Diameter | 35mm |
| Typical Thickness | 0.5mm, 1.0mm | Thickness Tolerance | ±0.05mm |
| Size Tolerance | ±0.1mm | Surface Finish | SSP or DSP |
| Roughness | Ra<0.5nm | Cleaness and Package | 1000 grade clean room, 100 grade bags |
STO Basic Properties:
| Crystal Structure | M6 | Growth Method | Blaze method |
| Unit Cell Constant | a=3.905Å | Twin Structure | Twin free |
| Color | Colorless to light yellow | Melt Point（℃） | 2080 |
| Density（g/cm3） | 5.175（g/cm3） | Hardness | 6-6.5（mohs） |
| Thermal Expansion（/℃） | 9.4×10-6 | Thermal Conductivity | 120 milliwatts/cm °C at 100 °C |
| Dielectric Constants | ε=300 | Chemical Stability | Insoluble in water |
| Tangent Loss | ~5×10-4（300k） ~3×10-4（77k） | Specific Resistivity | > 107Ohm/cm |
| Transmission Range | 0.4 to 6 µm | Refraction Index | nc = 2.380 nd = 2.409 nf = 2.488 |
| Dispersion | (nf - nc) = 0.108 |
Curves:
1）Typical X-Ray Diffraction (XRD) Curve of SrTiO3 Crystals Substrates
2) Typical Surface Roughness of SrTiO3 substrate <100> measured by Atomic Force Microscope (AFM) in 5μm x 5μm Scale
