SiC Materials
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Polytype
Both of Wolfspeed's product families (n-type and HPSI substrates) are 4H polytype. Wolfspeed does not offer 6H-SiC.
Physical Properties
| Polytype | Single-Crystal 4H |
| Supported diameters | 150mm & 200mm |
| Crystal Structure | Hexagonal |
| Bandgap | 3.26 eV |
| Thermal conductivity (n-type; 0.020 ohm-cm) | a-4.2 W/cm • K @ 298 K c-4.2 W/cm • K @ 298 K |
| Thermal conductivity (HPSI) | a-4.9 W/cm • K @ 298 K c-3.9 W/cm • K @ 298 K |
| Lattice Parameters | a = 3.073 Å c = 10.053 Å |
| Mohs hardness | 9 |
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