4inch 6inch Germanium Single Crystals Ge substrates
Wafers,customized Ge optical lens
2inch 3inch 4inch P-type N-type Ge substrate Germanium Wafers
Germanium substrates
Application: germanium wafer used in production of semiconductor
device, infrared ray optical device, sinking material of solar
cell.
| Main Property Terms | | |
| Production Method | Czochralski method(CZ) | |
| Crystal Structure | Cube | |
| Lattice Constant | a=5.65754Å | |
| Density | 5.323g/cm3 | |
| Melting Point | 937.4℃ | |
| Doped material | None doped or Sb doped | Indium or Gallium Doped |
| Type | /N | P |
| Resistivity | >35Ωcm0.05Ωcm | 0.05~0.1Ωcm |
| EPD | <4×103⁄cm2<4×103⁄cm2 | <4×103⁄cm2 |
| Size | 10x3,10x5,10x10,15x15,,20x15,20x20, | |
| dia2”x0.33mmdia2”x0.43mm15x15mm |
| Thickness | 0.5mm,1.0mm |
| Polishing | Single face or double face |
| Orientation | <100>,<110>,<111>,±0.5º |
| Crystal face Directional Accuracy | ±0.5° |
| Edge Directional Accuracy | 2°(Special request could be customized under 1°) |
| Bevel Shearing Directional Accuracy | Customized by special request, process edge direction by special
angle (inclination 1°-45°)of wafer |
| Ra: | ≤5Å(5µm×5µm) |
| Package | 100 Grade Cleaning Bag,1000Grade Super Cleaning Room |
Germanium (Ge) is the preferred lens and window material for high
performance infrared imaging systems in the 8–12 um wavelength
band. Its high refractive index makes Ge ideal for low power
imaging systems because of minimum surface curvature. Chromatic
aberration is small, often eliminating the need for correction.
Germanium is most widely used for lenses and windows in IR systems
operating in the 2 um - 12 um range. Its transmission is very
temperature sensitive, becoming opaque near 100°C. Environment does
not cause problems because Germanium is inert, mechanically rugged,
and fairly hard.
Germanium is a high index material that is used to manufacture
Attenuated Total reflection (ATR) prisms for spectroscopy. Its
refractive index is such that germanium makes an effective natural
50% beamsplitter without the need for coatings. It is also used
extensively as a substrate for production of optical filters.
Germanium covers the whole of the 8-14 micron thermal band and is
used in lens systems for thermal imaging. It can be AR coated with
diamond producing an extremely tough front optic.
Application as window, lens, beamsplitter, ATR prism or filter in
spectrometers and in thermal imaging.
Ge wafer:
| Growth Method | Cz |
| Dopant | p-type: Ga | n-type: As |
| Wafer Shape | Round (DIA: 2’’, 3’’, 4’’) |
| Surface Orientation * | (100)±0.5° |
| * Other Orientations maybe available upon request |
| Resistivity (Ω.cm) | As Required |
| Etch Pitch Density (cm2) | ≤ 300 |
| Thickness (µm) | 500±50um |
| TTV [P/P] (µm) | ≤ 20 |
| WARP (µm) | ≤ 20 |
| IF** (mm) | 32.5±1 |
| **If needed by customer |
| Surface front side polished | E/E, P/E, P/G |
| Products Feature For Optical Ge lens |
| applications: | infrared optical lens | Absorptivity | ≤0.03 |
| diameter(mm) : | 12mm-380mm | Modulus of rupture | ≥75 |
| length(mm): | customized | Hardness(kg/cm2): | 800 |
| resistance : | 1-50Ω, ≥50Ω | Density(g/cm3): | 5.33 |
| : | 10% | Young modulus(Gpa): | 103 |
| orientation: | 111 | Poisson's ratio: | 0.28 |
off orientation: | 0.5º | Thermal conductivity(Wm-1k-1): | 59 |
| type: | N type | thermal expansivity | 6.1 |
| refractive index(10µm): | 4.0026 | Specific heatCal/(g.k): | 0.074 |
| <1×10ˉ4 | Melting point(℃): | 937 |
thermal refractive index coefficient (10.6µm,10ˉ6/℃ˉ1): | 400 | Dielectric constant | permittivity:16 | 16 |
| Optical windows finished products |
Ge wafer for optical grade:
| SL.No | Material Specifications: | |
| 1 | Crystalline Form : | Polycrystalline |
| 2 | Conductivity Type : | n-type |
| 3 | Absorption Coefficient, at 25°C | 0.035cm-1 max @10.6µm |
| 4 | Typical Resistivity : | 3-40 ohm-cm |
| 5 | size | dia1-150mmxthickness0.5-20mm |
| 6 | Mohs Hardness : | 6.3 |
| 7 | Oxygen Content : | < 0.03 ppm |
| 8 | Holes and Inclusions: | <0.05 mm |
| 9 | surface | lapped/1sp/2sp |
| 10 | S/D | 40/20,20/10,60/40,80/50, |
| | |
FAQ:
Q: What's your MOQ?
A: (1) For inventory, the MOQ is 3pcs.
(2) For customized products, the MOQ is 25pcs up.
Q: What's the delivery time?
A: (1) For the standard products
For inventory: the delivery is 5 workdays after you place the
order.
For customized products: the delivery is 2 or 3 weeks after you
place the order.
(2) For the special-shaped products, the delivery is 4 workweeks
after you place the order.
Q: how is the way of shipping and cost?
A:(1) We accept DHL, Fedex, EMS etc by 100％ in advance before
delivery.
(2) If you have your own express account, it's great.If not,we
could help you ship them.
Freight is in accordance with the actual settlement.
Q: Can I customize the products based on my need?
A: Yes, we can customize the material, specifications for your
optical components
based on your needs.
