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Fe:SrTiO3 Crystals and Substrates
Similar crystal structure to SrTiO3
  • Typical Thickness: 0.5/1.0mm or customized
  • Typical Orientations:<100> <110> <111>
  • Clean package: class 1000 clean room and class 100 bags
  • Single side or double sides polished optional
  • Fe concentration (%): 0.05%, 0.04%
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    Specifications:

    Material Fe:SrTiO3 Size(mm) 10×3, 10×5, 10×10, 15×15, 20×15
    Thickness 0.5mm, 1.0mm Size Tolerance <±0.1mm
    Thickness Tolerance <±0.015mm (special requirement can reach <±0.005mm) Polishing Single or Double surface polished (SSP or DSP)
    Orientations <100>, <110>, <111> Redirection Precision ±0.5°
    Redirection the Edge 2°(special in 1°)
     

    Basic Properties:

    Crystal Structure Cubic Growth Method Flame Method
    Lattice Constant a=3.905Å Fe Concentration(%) 0.05%, 0.04%
    Melt Point(℃) 2080 Density(g/cm3) 5.122
    Hardness(mohs) 6-6.5 Dielectric Constants ε=5.20
    Chemical Stability Insoluble in Water Coefficient of Thermal Expansion(/℃) 9.4×10-6
    Thermal Expansion Coefficient 10.4×10-6/k Loss Tangent ~5×10-4(300k) ~3×10-4(77k)

    Iron Doped Strontium Titanate Crystal Substrate (Fe:STO) is manufactured through adding small amounts of Iron into the SrTiO3 lattice. The dielectric and magnetic properties from the iron dopants grant Fe-doped SrTiO3 crystal substrate usage in field-effect transistors (FETs), HEMTs, MRAM, and magnetic field sensors. Shanghai North Optics provides Fe:SrTiO3 substrates with 0.05%, and 0.04% iron doping concentrations.