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2" Standard Wafer

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Wafer
 
Item Specification
Product Name 2" Standard Sapphire Wafer 4" Standard Sapphire Wafer 6" Standard Sapphire Wafer
Substrate Materials High Purity Al2O3
Per Customers' Request
Surface Plane Orientataion
C-axis tilted toward M-axis 0.20 +/- 0.10 deg.
C-axis tilted toward A-axis 0.00 +/- 0.10 deg.
Primary Flat Orientation A-axis 0.00 +/- 0.20 deg. 
Diameter 50.8 +/- 0.1 mm 100 +/- 0.1 mm
Thickness 430 +/- 15 µm 650 +/- 15 µm
Flat Length 16.0 +/- 1.0 mm 30.0 +/- 1.0 mm
TTV < 10 µm < 20 µm
Bow -10 ~ 0 µm -20 ~ 0 µm
Warp < 15 µm < 30 µm
Front-side Roughness (Ra) < 3 Å < 3 Å
Back-side Roughness (Ra) 1 +/- 0.2 µm 1 +/- 0.2µm
Wafer Edge T type
Remarks:
Customised thickness and flat length are available upon customers' requirement.