• Material: High Purity >99.99%, single crystal Al2O3

• Dimension: 50.8 mm +/- 0.1 mm

• Thickness: 430 um +/- 25 um for SSP and 400 um +/- 25 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

• 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) front side epi-ready 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 epi-ready surface Ra < 0.3 nm (AFM)

Q:What is your minimum order requirement?
A:MOQ:10 piece

Q:How long will it take to execute my order and delivery it ?
A:confirm the order 1days After confirming the payment and delivery in 5days if on stocks.

Q:Can you give warranty of your products ?
A:We promise the quality, if the quality has any problems, we will produce new produces or return you money.

Q:How to pay?
A:T/T, Paypal, West Union, bank transfer.

Q:HOW about the freight ?
A:we can help you pay for the fee if you don’t have account,
if the order is over 10000usd, we can delivery by CIF.
Q:If you have any other questions,please do not hesitate to contact me.
A : connect with by skype/whatsapp :+86 158 0194 2596 or 2285873532@qq.com
we are at your side any time~~