High Refractive DSP Surface GE Germanium Wafer

Place of Origin CHINA
Brand Name zmkj
Model Number Ge-optical
Minimum Order Quantity 3pcs
Price by case
Packaging Details single wafer case
Delivery Time 1-4weeks
Supply Ability 1000pcs/month
Product Details
Materials Ge Single Crystal Industry Semiconductor Substrates,device,optical
Color Black Diameter 0.5~150mm
Surface DSP Thickness 0.1-100mm
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DSP Surface Germanium Wafer


high refractive Germanium Wafer


DSP Surface ge wafer

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Product Description

2inch 4inch 6inch N Type P type doped Germanium Single Crystals Wafers,

Germanium Single Crystals optical plates


Ge wafer / Ge window


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.

General Properties
General Properties Structure
Cubic, a = 5.6754 Å
Density: 5.765 g/cm3
Melting Point: 937.4 oC
Thermal Conductivity: 640
Crystal Growth Technology
Doping available
Sb Doping
Doping In or Ga
Conductive Type
Resistivity, cm-1
< 0.05
0.05 - 0.1
< 4x10^3/cm2
< 4x10^3/cm2
< 4x10^3/cm2
Crystal Grades and Application
(please specify when you order) Electronic Grade
Used for diodes and transistors
Infrared Grade
Used for IR optical window
Cell Grade
Used for substrates of solar cell
Standard Specs of Ge Crystal and wafers
Crystal Orientation
<111>,<100> and <110> ± 0.5° or custom orientation
Crystal boule as grown
1" ~ 5" diameter x 200 mm Length
Standard blank as cut
1"x 0.5mm
Standard Polished wafer(One/two sides polished)
1"x 0.30 mm


Germanium  also 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.

Specifications for Ge windows :



Dimension Tolerance +0.0, -0.1mm
Thickness Tolerance: ± 0.1mm
Surface quality: 60/40
Clear Aperture: >85%
Flatness: λper 25mm
Parallelism: 3'
Bevel: <0.25mm X 45°
Coating: Upon requirement


Materials characteristics

Item                                       B270  CaF2  Ge    MgF2  N-BK7  Sapphire      Si    UV Fused Sillca 
Refractive index(nd)           1.523  1.434  1.003  1.413   1.517   1.768         3.422          1.458 
Coeffcient of dispersion(Vd)58.5   95.1    N/A    106.2     64.2      72.2           N/A             67.7
Density(g/cm3)                     2.55  3.18    5.33     3.18     2.46       3.97          2.33           2.20  
TCE(μm/m℃)                       8.2   18.85   6.1      13.7       7.1         5.3            2.55          0.55  
Soften Temperature(℃)     533     800     936      1255     557       2000          1500          1000 
Knoop hardness(kg/mm2) 542   158.3    780      415       610        2200          1150          500 


High Refractive  DSP Surface GE Germanium Wafer 0




Q:Why to choose ZMKJ?

A. ZMKJ has a factory manufactuer offers custom varied high quality optical and semi wafers products.

B. A compelet set of trade serves timely.

C. Stable delivery,General produce time:7-20 days.

Q:How to pay?

100% in advance before delivery by TT,paypal, Alipay. delivery company choose DHL,Fedex ,SF,EMS.