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SrTiO3 Substrates

  • Twin-less crystal structure, high physical and good mechanical properties
  • Maximum diameter: 35mm, typical thickness 0.5 /1.0mm
  • Stocked and custom SrTiO3 substrates available
  • Surface Roughness: Ra < 0.5nm
  • Clean package: 1000 grade clean room and 100 grade bags
  • Other applications: epitaxial growth of HTSC and oxide thin films(e.g.YBCO, Bi-system, La-system,etc.), Special optical windows, high quality sputtering, Magnet Sputtering, Pulsed Laser Deposition (PLD)
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 Φ12.7mmx0.5mm <100> DSP

SrTiO3 Wafers Φ12.7mmx0.5mm <100> DSP

STO / SrTiO3 (Strontium Titanate) Crystal Substrates

STO / SrTiO3 (Strontium Titanate) Crystal Substrates

SrTiO3 Wafers Φ25.4mmx0.5mm <100> SSP

SrTiO3 Wafers Φ25.4mmx0.5mm <100> SSP