Infrared-Grade Germanium (Ge) Single Crystal Wafers

Infrared-Grade Germanium (Ge) Single Crystal Wafers, Double-Side Polished

Product Overview：
High-purity infrared-grade germanium (Ge) single crystal wafers are widely used for infrared optical systems, thermal imaging, laser applications, and scientific research. These double-side polished germanium substrates feature excellent infrared transmission, high thermal stability, and superior mechanical durability. Custom sizes, thicknesses, and coatings are available to meet diverse optical and research requirements.

Physical Properties：
* Material: Germanium (Ge)
* Crystal Structure: Single Crystal, Cubic
* Purity: ≥ 99.9999%
* Atomic Number: 32
* Melting Point: 937 °C
* Density: 5.33 g/cm^3
* Young’s Modulus: 103 GPa
* Thermal Expansion Coefficient: 6.1 × 10^-6 °C^-1

**Optical Infrared Grade Parameters：
* Conductivity Type: N-type (optical infrared grade)
* Crystal Orientation: <111>
* Resistivity: 5–40 Ω·cm
* Diameter Range: 3 – 100 mm (customizable)
* Diameter Tolerance: 0 / -0.1 mm
* Thickness Tolerance: ±0.1 mm
* Surface Finish: Double-Side Polished
* Surface Accuracy: λ/4 – λ/5
* Parallelism: < 5′ * Clear Aperture: > 90%
* Bevel: < 0.2 × 45°
* Coating: Uncoated standard; AR coating or DLC coating optional

**Key Features：
* High infrared transmittance (2–14 μm)
* Excellent thermal and mechanical stability
* Precision double-side polishing
* Suitable for infrared optics and laser systems
* Customizable dimensions and coatings available

**Typical Applications：
* Infrared optical windows
* Thermal imaging systems
* Infrared spectroscopy (FTIR)
* Laser and optical systems
* Scientific research and semiconductor optics

**Packaging：
* Cleanroom vacuum packaging
* Individual wafer box packaging
* Anti-static and shockproof protection for safe transport