Wafer products

Controlled expansion alloy wafers up to 12” diameter supplied as lapped, polished or polished and metallized wafers, expansion matched to compound semiconductor materials.
更多信息请
Our alloy wafers are used for:
- Medium and high brightness LED
- Photovoltaic cells
Alloys chosen are typically CE6F and CE7F, and these are used to replace sapphire – GaAs.
Advantages of CE6F controlled expansion alloy
- CTE matching of compound semiconductor materials
- Superior thermal and electrical properties
- Enhanced reliability
- Low cost
Material | CE6F |
---|---|
Diameter | 100 mm +/-0.05 mm |
Flat | 32 mm +/-0.02 mm |
Chamfer | 220 μ +/-50 μ |
Thickness | 750 μ +/- 20 μ |
TTV | <5 μ |
Surface | Polished both sides Ra < 20 nm |
Bow weight | < 20 μ |
Property | Ge | Si | GaAs | Sapphire | CE6 |
---|---|---|---|---|---|
CTE 25–300ºC | 5.8 | 3 | 6.8 | 5.8 | 6.2 |
Density g/cc | 5.32 | 2.3 | 5.3 | 4.0 | 2.45 |
Young's Modulus, GPa | 130 | 112 | 85 | 350 | 130 |
Thermal conductivity, W/mK | 64 | 150 | 40 | 35 | 110 |
Electrical resistivity, μΩ.cm | 50 | 105 | 107 | 1014 | 115 |
Plateability | Good | Poor | Poor | Poor | Good |
Machinability (CNC/EDM) | Poor | Poor | Poor | Poor | Good |