Dia 200mm Synthetic Sapphire Wafer BF33 For GaAs Semiconductor Carrier Plate

8inch 12inch Dia200mm synthetic sapphire Bf33 0.725mm Wafer for GaAs

Specifications

Material: Single crystal Al2O3 99.999％
Diameter200.00±0.2mm 155.575±0.03mm；104±0.02mm；159±0.02mm；
Thickness :725±25um
Primary flat: notch 
OF Orientation flat: a±0.2°C-plane(0001)
Orientation: c±0.3°
Frontside Surface Roughness:Ra＜0.3nm
Backside Surface Roughness: Ra＜0.3nm
Or double side polished
TTV:＜15um BOW:-20~0um  WARP:＜30um
Laser Mark Series No. by needs
Package:Vacuum-sealed containers with nitrogen backfill in a class 100environment
Cleanliness :Free visible contamination

Produce step for saphire wafers

Sapphire crystal body--->get rough ingot in customized axis--->cut tail＆ top off---->

repair diameter shape----> Grind OF surface--->( anneal -->)wire cut--->chamfer-->anneal--->lapped---polished---infection

Synthetic sapphire—sometimes referred to as sapphire glass—is commonly used as a window material, because it is both highly transparent to wavelengths of light between 150 nm (UV) and 5500 nm (IR) (the visible spectrum extends about 380 nm to 750 nm, and extraordinarily scratch-resistant.

The key benefits of sapphire windows are:

Very wide optical transmission band from UV to near-infrared, (0.15–5.5 µm)
Significantly stronger than other optical materials or standard glass windows
Highly resistant to scratching and abrasion
Extremely high melting temperature (2030 °C)

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