Description
Substrate Specifications
- Sapphire substrate is the popular substrates for III-V nitrides, superconductor and magnetic epi film due to less mis-matched lattice and stable chemical and physical properties
- Maximum Size: Diadeter 6 inch, and other size contact for me
- Orientation:
(11-20 ) – a plane: 2.379 Å (1-102) – r plane: 1.740 Å
(10-10) – m plane: 1.375 Å (0001) – c plane: 2.165 Å - Edge orietation Indication: +/-2 Deg avaiable as option.
- Polish: EPI polished by CMP tecnology with less sub-surface lattice damage.
- Surface finish (RMS or Ra): <5A
- Pack: Packed in 100 grade plastic bag under 1000 class clean room.
Optical Transmission Properties
Typical Properties:
| Typical Physical Properties | |
| Crystal Structure | Hexagonal. a=4.758 Angstroms c=12.99 Angstroms |
| Growth Method | CZ |
| Density | 3.97 g/cm3 |
| Melt Point | 2040 oC |
| Hardness | 9 ( Mohn) |
| Thermal expansion | 7.5×10-6 (/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 | < 2×10-5 at A axis , < 5 x10-5 at C axis |
| Crystal Purity | ＞99.99% |
| Color and Appearance | Transparent (sometimes slightly brown based on annealing condition). No twins. |
| Chemical Stability | Insoluble in water |
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