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SrTiO3 Substrates

      • Maximum diameter: 35mm
      • Custom wafers available upon request
      Inquire for custom product  
      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







      SrTiO3 Wafers Φ25.4mmx0.5mm <100> DSP

      SrTiO3 Wafers Φ25.4mmx0.5mm <100> DSP

      SrTiO3 Wafers 10x10x0.5mm <100> SSP

      SrTiO3 Wafers 10x10x0.5mm <100> SSP

      SrTiO3 Wafers 5x5x0.5mm <100> DSP

      SrTiO3 Wafers 5x5x0.5mm <100> DSP