Epi – Ready DSP SSP Sapphire Substrates Wafers 4inch 6inch 8inch 12inch

Material Sapphire(Al2O3)

Density(20°C) Kg/M3 3.98×103

Crystal Structure Hexagonal

Crystal Lattice Constant A=4.785Å C=12.991 Å

Mohs Hardness 9

Melting Point 2045°C

Boiling Point 3000°C

Coefficient Of Thermal Expansion Α=5.8×10 -6 /K

Specific Heat 0.418W.S/G/K

Thermal Conductio 25.12W/M/K(@100°C)

Refractive Index (Nd) No=1.768Ne=1.76

Dn/Dt 13×10-6/K(@633Nm)

Tranmission T≈85%(0.3~5Um)

Permittivity 11.5(//C), 9.3(⊥C)

Sapphire Washers, Sapphire Windows, Sapphire Bearings, Sapphire Rods, Sapphire Tubes, Ruby

Sapphire Wafer, Dome Sapphire, Sapphire Insulation Film, Sapphire Ball Lens, Sapphire/Ruby Ball

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)

1. 8inch Sapphire Specification for reference 

Material: Single crystal Al2O3 99.999％
Diameter200.00±0.2mm
Thickness :725±25um
Primary flat: Round or V- notch 
OF Orientation flat: a±0.2°A-plane(0001)
Orientation: C(0001)±0.3°
Frontside Surface Roughness:Ra＜0.3nm
Backside Surface Roughness: Ra＜0.3nm
Or SSP side polished;Backside Surface Roughness: Ra＜1.0nm
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