Sapphire

Sapphire (α-Al2O3) is widely used in many fields for its excellent characteristics, in particular chemical resistance, thermal conductivity, hardness, transparency. Adamant Namiki grows single crystal sapphire by EFG method, by which different cross-section forms can be obtained.

Characteristics of Single Crystal Sapphire

  • High-hardness
    - abrasion resistance
  • Transparency
    - in the range from ultraviolet to infrared light (200~7000nm)
  • Chemical resistance and heat resistance
    - resist almost all kinds of acid and alkaline, heat up ~2000°C
  • Suitable for the application of insulation property required.

Applications of Single Crystal Sapphire

Single Crystal Sapphire Growth

Namiki produces single crystal sapphire in any desired section shape by EFG Method.
(Edge-defined Film-fed Growth Method)

Characteristics of EFG Method

  • Growth of sapphire wafers with large diameter
  • Controllability of crystal orientation

Crystal Shape after pull-up

Sectional View Dimensions Tolerance Crystal Orientation Surface Flatness
Sectional View 0.3~300mm
t=0.01~100
±0.005 ±2deg Ra=0.0001μm
Sectional View 0.3~300mm ±0.005 C Axis in 5μm
Sectional View O.D:Max.φ100mm
I.D:Min.Φ2.0mm
±0.005
±0.002
-
-
5μm
Sectional View Offer any desired sectional shape. - C Axis in 5μm
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