MSE PRO 1 inch Sapphire Wafer C-Plane Single or Double Side Polish Al₂O₃ Single Crystal

Sapphire Wafer, 1 inch, C-plane (0001), Prime Grade

Product SKU#: WA0427 for single side polished (SSP) or WA0430 for double side polished (DSP)

Customized sapphire wafers and windows are available upon request

• Material: High Purity >99.99%, single crystal Al₂O₃
• Dimension: 25.4 mm +/- 0.1 mm
• Thickness: 650 um +/- 25 um for SSP, 600 um +/- 25 um for DSP
• Lattice Parameter: a=4.785 Å, c=12.991 Å
• Density: 3.98 g/cm³
• Orientation: C plane (0001)
• Primary Flat Orientation: no flat
• Primary Flat Length: no flat
• 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: single side polished (SSP) or double side polished (DSP) Ra < 0.5 nm (by AFM). The reverse side of SSP wafer was fine ground to Ra = 0.8 - 1.2 um.
  
• Transmittance: 88% +/-1 % @460 nm (for DSP wafers)