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Double Side Polish Sapphire Wafer C-Plane Al2O3 Single Crystal, 25x25x1mm

  • $ 3950


Sapphire Wafer, 25x25x1mm, C-plane (0001), Double Side Polish, Prime Grade


Customized sapphire wafers and windows are available upon request

  • Material: High Purity >99.99%, single crystal Al2O3
  • Dimension: 25x25x1mm
  • Lattice Parameter: a=4.785 Å, c=12.991 Å
  • Density: 3.98 g/cm3
  • Orientation: C plane (0001)
  • Total Thickness Variation (TTV): <5 um
  • Bow: <10 um
  • Warp: <10 um
  • Thermal Expansion Coefficient: 6.66 x 10-6 / °C parallel to C axis, 5 x 10-6 /°C perpendicular to C axis
  • Dielectric Strength: 4.8 x 105 V/cm
  • Dielectric Constant: 11.5 (1 MHz) along C axis, 9.3 (1 MHz) perpendicular to C axis
  • Dielectric Loss Tangent (a.k.a. dissipation factor): less than 1 x 10-4
  • Thermal Conductivity: 40 W/(m.K) at 20℃ 
  • Polishing: Double side polished (DSP) Ra < 0.5 nm (by AFM).