4inch Cplane Sapphire Substrate
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4inch Cplane Sapphire Substrate

Chemical Properties:
Sapphire is a crystalline form of aluminium oxide (Al2O3). It is formed of Al3+ cations and O2- anions arranged in a hexagonal lattice. It is extremely unreactive and chemically-resistant to acids and alkalis, including hydrofluoric acid.
Mechanical Properties:
Sapphire is exceptionally hard with a Mohs hardness of 9, second only to diamond (which has a hardness of 10). For comparison, glass has a hardness of ~5.5. This makes it extremely scratch-resistant.
4inch sapphire substrates are also our normal products with large quantity stock,which can be delivered quickly and competitive price.
  • 4inch

  • FineWin

Product Description

Detailed specification:

Item4-inch C-plane(0001) 650μm Sapphire Wafers
Growth MethodKY
Crystal Materials99,999%, High Purity, Monocrystalline Al2O3
OrientationCplane (0001)+/- 0.1°  or Cplane off Mplane0.2+/- 0.1°
Thickness650 μm +/- 25 μm
Primary Flat OrientationA-plane(11-20) +/- 0.2°
Primary Flat Length30.0 mm +/- 1.0 mm
Front surfaceEpi-polished, Ra < 0.2 nm (by AFM)
Back surfaceEpi-polished, Ra < 0.2 nm (by AFM)Fine ground, Ra = 0.8 μm to 1.2 μm
TTV< 20 μm
BOW< 20 μm
WARP< 20 μm
CleaningClass 100 cleanroom cleaning and vacuum packaging,
Packaging25 pieces in one cassette packaging or single piece packaging.


Sapphire substrates are ideal for use instead of glass substrates when optical transmission is required in the ultraviolet (above 200 nm) or infrared (below 5 μm) range. Low-temperature optical measurements will also benefit from the higher thermal conductivity of sapphire substrates, and they may also be used in high temperature environments up to 2300 K.