MSE PRO Sapphire Crystal Substrate, 25x25x1mm, C-plane (0001), Double Side Polish, Prime Grade

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

SKU# WA0432

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): <10 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).