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Sapphire Wafer

Sapphire Wafer

Sapphire wafers are thin discs made from a single crystal of sapphire, a high-performance material with excellent mechanical, thermal, and optical properties. Sapphire wafers are commonly used in a wide range of applications, such as in the production of LEDs, high-temperature and high-pressure sensors, microelectronics, and other optical components.

The manufacturing process of sapphire wafers involves a complex and precise process of growing, cutting, and polishing the sapphire crystal. First, a seed crystal is placed in a crucible with molten alumina, and the crystal is slowly pulled upwards while rotating. This process allows a single crystal to form and grow vertically, with a specific orientation and lattice structure.

After the crystal is grown, it is then cut into thin discs using a diamond saw or laser cutting. These discs are then polished to a high degree of smoothness using a series of abrasives and chemical treatments, resulting in a flawless surface finish. The final wafers are then inspected and tested for quality and performance.

Sapphire wafers have a range of advantages over other materials, including high hardness, excellent optical clarity, high thermal conductivity, and high resistance to chemicals and corrosion. These properties make sapphire wafers ideal for a wide range of demanding applications, where precision, durability, and reliability are crucial.


Catalog No. CERAMICS
Size Customized
Material Al2O3
Purity 95% 99% 99.7%
Density 3.8~3.9 g/cm3


At CG Material, we offer high quality Sapphire Wafer with exceptional purity and precision in terms of size. Our products range in diameter from 1mm to 100mm and have a purity level of up to 99.8%. We also provide custom manufacturing options for special shapes to meet specific needs.

Sapphire Wafer Specifications




Ø 1" / Ø 2" / Ø 3" / Ø 4"/ Ø 5"


10 x 10 / 20 x 20 / 50 x 50 / 100 x 100 mm


0.43 mm / 0.5 mm  / 1 mm


one side / two sides epi polished


Ra ≤ 5 A


Single wafer container or Ampak cassette


Chemical formula


Crystal structure


Lattice constant

4.77 A



Thermal conductivity

46 W / mk

Dielectric constant


Refractive index



Sapphire Wafer Applications

– High-frequency device
– High power device
– GaN epitaxy device
– High-temperature device
– Optoelectronic device
– Light-emitting diode


We handle our products with care to ensure they remain in their original condition during storage and transportation and to preserve their quality.



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