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ITO-Coated-Glass-Substrate27

Al2O3- Sapphire Wafer, R Plane 2SP

Size

earures:

  • R plane -- (1-102) orientation sapphire wafer is being used  as a superconductor substrate due to less mis-matched lattice and stable chemical and physical properties. 
  • (1-102) C plane orientation +/- 0.5o
  • Polished surface: Both sides optically polished
  • Surface roughness:  < 5A by AFM
  • Package: Each wafer is packed in 1000 class clean room with 100 grade plastic bag with wafer container
  • Precaution: R plane sapphire wafer is easy to cleave compared with C plane's. Please handle it with a care

Typical Properties:

  • Crystal Structure: Hexagonal. a=4.758 Angstroms c=12.99 Angstroms
  • Melting Point: 2040 degree C
  • Density: 3.97 gram/cm2 
  • Growth Technique: CZ
  • Crystal Purity:  >99.99%
  • Hardness: 9 ( mohs)
  • Thermal Expansion: 7.5x10-6 (oC)
  • Thermal Conductivity: 46.06 @ 0 oC, 25.12 @ 100 oC, 12.56 @ 400 oC ( W/(m.K) ) 
  • Dielectric Constant: ~ 9.4 @300K  at A axis ~ 11.58@ 300K at C axis
  • Loss Tangent at 10 GHz: < 2x10-5  at A axis,  <5 x10-5  at C axis
 

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