Products

SrTiO3 Substrates
  • Twinless crystal structure, excellent physical and good mechanical properties
  • Maximum diameter: 35mm, typical thickness 0.5 /1.0mm
  • Stocked and custom SrTiO3 substrate
  • Surface Roughness: Ra < 0.5nm
  • Clean package: class1000 clean room and class 100 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 Us  
    CodeSizeThicknessOrientationSurface FinishUnit PriceDeliveryCart
    642-0015x5mm0.5mm<100>SSPInquire2 weeks
    642-0025x5mm0.5mm<100>DSPInquire2 weeks
    642-0035x5mm0.5mm<110>SSPInquire2 weeks
    642-0045x5mm0.5mm<111>SSPInquire2 weeks
    642-00510x10mm0.5mm<100>SSPInquire2 weeks
    642-00610x10mm0.5mm<100>DSPInquire2 weeks
    642-00710x10mm0.5mm<110>SSPInquire2 weeks
    642-00810x10mm0.5mm<111>SSPInquire2 weeks
    642-009Φ12.7mm0.5mm<100>SSPInquire2 weeks
    642-010Φ12.7mm0.5mm<100>DSPInquire2 weeks
    642-011Φ20mm0.5mm<100>SSPInquire2 weeks
    642-012Φ20mm0.5mm<100>DSPInquire2 weeks
    642-013Φ25.4mm0.5mm<100>SSPInquire2 weeks
    642-014φ25.4mm0.5mm<100>DSPInquire2 weeks

    Strontium Titanate or SrTiO3 (STO) single crystal has a twinless crystal structure and very good physical and mechanical properties for film growth. STO provides a good lattice match to most materials with Perovskite structure. It is an excellent substrate for epitaxial growth of HTSC (High-Temperature Superconductor) and various oxide thin films. Its lattice constant (3.905Å) matches well with the common high TC superconductive material YBCO (lattice constant 3.88 Å). STO is also a suitable platform for other high TC films such as Bi-system, La-system, and others.  SrTiO3 single crystal has been utilized for special optical windows and as a high-quality sputtering target as well. It can also accommodate diverse film growth technologies such as Magnet Sputtering, Pulsed Laser Deposition (PLD), Vaporization, MOCVD, CVD, laser MBE, etc. Films made with these materials and technologies on SrTiO3 wafers exhibit excellent performance.

    Shanghai North Optics provides stocked standard SrTiO3 (or STO) wafers and customized wafers.

    Common Specifications:

    MaterialsSrTiO3 crystalsOrientations<100>,<110>,<111>
    Orientation Error±0.5°Maximum Diameter35mm
    Typical Thickness0.5mm, 1.0mmThickness Tolerance±0.05mm
    Size Tolerance±0.1mmSurface FinishSSP or DSP
    RoughnessRa<0.5nmCleanness and Packageclass 1000 clean room, class 100 bags

    STO Basic Properties:

    Crystal StructureM6Growth MethodBlaze method
    Unit Cell Constanta=3.905ÅTwin StructureTwin free
    ColorColorless to light yellowMelt Point(℃)2080
    Density(g/cm35.175(g/cm3Hardness6-6.5(mohs)
    Thermal Expansion(/℃)9.4×10-6Thermal Conductivity120 milliwatts/cm °C at 100 °C
    Dielectric Constantsε=300Chemical StabilityInsoluble in water
    Tangent Loss~5×10-4(300k) ~3×10-4(77k)Specific Resistivity> 107Ohm/cm
    Transmission Range0.4 to 6 µmRefraction Indexnc = 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