Al2O3 Substrate (Sapphire)
Al2O3 crystal or Sapphire is a multi-function crystal materials with excellent properties: good thermos-stability, high thermal conductivity, high hardness, high transmission at infrared wavelength rang and excellent chemical stability. Sapphire is widely used in industrial, defense and security and scientific research fields. sapphire is also an important substrate materials for high temperature superconductivity applications, it can be used for film growth of Y-series, La-series, and it is also used to grow the superconductivity film of MgB2.
OST Photonics offers high quality Al2O3 substrates for researchers and industries. Crystal orientation, size and thickness can be customized according to your requirements.
Features
Good thermos-stability
High thermal conductivity
High hardness
Applications
High temperature superconductivity film
IR window
Processing Capability
Orientation: A-plane<11-20>, R-plane<1-102>, M-plane<10-10>, C-plane<0001>, etc.
Dimension: 2”, 4”, 6”, 8”, 10x5mm, 10x10mm, 15x15mm, 20x15mm, 20x20mm, etc.
Thickness: 0.43mm, 0.5mm, 0.65mm, 1.0mm, etc.
Available items: wafers, substrates and customized products
Specification and Properties of Al2O3 Substrates
Crystal Structure | Hexagonal | ||
Lattice Constant | a=4.748Å, c=12.97Å | ||
Density | 3.98 g/cm^3 | ||
Melt Point | 2040 ℃ | ||
Growth Method | Czochralski, Kyropoulos | ||
Mohs Hardness | 9 Mohs | ||
Refractive Index (300K) | ∥c, 1.762 @630nm ⊥c, 1.770 @630nm | ||
Thermal Expansion | 5.8 ×10-6/K | ||
Thermal Conductivity (K/(°cm.s)) | ⊥c | //c | |
23℃, 0.055 | 26℃, 0.06 | ||
77℃, 0.040 | 70℃, 0.041 | ||
Loss Tangent at 293K | 1×10^-4 (1MHz) | ||
Dielectric Constant at 103-109Hz @25℃ | ∥c, 11.5 ⊥c, 9.3 | ||
Transmittance | 80%@ 400~4000nm | ||
Orientation | A-plane | <11-20> | 2.379 Å |
R-plane | <1-102> | 1.740 Å | |
M-plane | <10-10> | 1.375 Å | |
C-plane | <0001> | 2.165 Å | |
Orientation Tolerance | ±0.5° or better | ||
Dimensions | 2”, 4”, 6”, 8”, 10x5mm, 10x10mm, 15x15mm, 20x15mm, 20x20mm, etc. | ||
Dimension Tolerance | ±0.1 mm or better | ||
Thickness | 0.43mm, 0.5mm, 0.65mm, 1.0mm, etc. | ||
Thickness Tolerance | ±0.05 mm or better | ||
Surface Finish | Single side polished (SSP)/Double sides polished (DSP) | ||
Surface Roughness | Ra<5Å (5×5μm) | ||
Package | Class 100 clean bag, Class 1000 super clean room | ||