Germanium
Optical crystal germanium(Ge) has excellent through performance in 2-14 microns band, They are widely used as the window of the thermal imaging system and optical components.Our company production of optical crystal germanium products have excellent uniformity infrared transmittance and refractive index, and can make window,lens and prism and other special shaped products according to customer needs.
We can also make Diamond like Carbon Coating(DLC coating) for Ge windows.
| Major capability parameter
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| Growth method | Czochralski method | ||
| Crystal structure | M3 | ||
| Unit cell constant | a=5.65754 Å | ||
| Density | 5.323g/cm3 | ||
| Melt point | 937.4℃ | ||
| Doped material | No doped | Sb-doped | In / Ga –doped |
| Type | / | N | P |
| Resistivity | ＞35Ωcm | 0.05Ωcm | 0.05~0.1Ωcm |
| EPD | ＜4×103∕cm2 | ＜4×103∕cm2 | ＜4×103∕cm2 |
| Size | 10x3，10x5，10x10，15x15，，20x15，20x20， | ||
| dia2” x 0.33mm dia2” x 0.43mm 15 x 15 mm | |||
| Thickness | 0.5mm，1.0mm | ||
| Polishing | Single or double | ||
| Crystal orientation | <100>、<110>、<111>、±0.5º | ||
| Ra: | ≤5Å（5µm×5µm） | ||
