Sapphire Wafer (Al2O3 Wafer)
OST Photonics offers a variety of standard and customized sapphire wafers in different specifications, with diameters ranging from 2 inches to 8 inches. In addition, sapphire optical windows can also be provided according to your requirements. Sapphire crystals have the characteristics of scratch resistance, high transmittance, and easy cleaning, and are widely used in the optical and digital imaging fields of mobile phones, cameras, etc.
Specifications of Sapphire Wafers (Al2O3 Single Crystal Wafers)
Parameter | Specification | |||
2 inch | 4 inch | 6 inch | 8 inch | |
Material | >99.996% Single Crystal AL₂O₃ | |||
Crystal Orientation | 0.2°off axis±0.1°Towards M axis or Customized | |||
Primary Flat | 0°±0.15° | |||
Diameter | 50.8±0.1mm | 100±0.1mm | 150±0.2mm | 200±0.2mm |
Thickness | 430±10um | 650±15um | 1300±25um/ 1000±25um | 1600/1300/1000/ 800/700±15μm |
Flat Length/Notch | 16.0±1.0mm | 30.0±1.0mm or Depth 1-1.25mm Angle 89°-95° | 47.5±1.0mm/ 57.5±1mm or Depth 1-1.25mm Angle 89°-95° | 63.5±1mm or Depth 1-1.25mm Angle 89°-95° |
TTV | <5um | <10um | <10um | <10um |
LTV | <1.5um(5*5mm) | <2um(5*5mm) | <2um(1*10mm) | <3um(10*10mm) |
BOW | -8-0um | -10-0um | -15-0um | -10~10um |
WARP | <10um | <15um | <20um | <20um |
Front Surface Finish | Ra<0.3nm or Ra<0.2nm | |||
Back Surface | Ra=0.6~1.2um or customized | |||
Laser Marking | Front Surface/Back Surface | |||
Cleanliness | Free Visible Contamination | |||
| Cassette (25 pieces) or single-piece box | ||||
Other | Upon Request | |||