MSE PRO 2 inch Sapphire Wafer C-Plane Single or Double Side Polish Al₂O₃ Single Crystal

Sapphire Wafer, 2 inch, C-plane (0001), Prime Grade

Customized sapphire wafers and windows are available upon request

• Product SKU#: WA0405 single side polished, WA0402 double side polished 400um, WA0401 double side polished 300um, WA0422 double side polished 200um
• Material: High Purity >99.99%, single crystal Al₂O₃
• Dimension: 50.80 mm +/- 0.10 mm
• Thickness: 430 um +/- 25 um for SSP and 400 um +/- 15 um for DSP (other thickness available upon request)
• Lattice Parameter: a=4.785 A, c=12.991 A
• Density: 3.98 g/cm³
• Orientation: C plane (0001) to M (1-100) 0.2 +/- 0.1 degree off.
• Primary Flat Orientation: A-plane [11-20] +/- 0.2 deg
• Primary Flat Length: 16.0 +/- 1.0 mm
• Total Thickness Variation (TTV): <5 um (SSP), ≤6 um (DSP)
• Bow: -10 to 0 um
• Warp: <10 um (SSP), ≤ 20 um (DSP)
• 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) polished side surface Ra < 0.3 nm (AFM), back side fine-ground Ra = 0.8 ~ 1.2 um, or double side polished (DSP) both front and back sides surface Ra < 0.3 nm (AFM)