Infrared-Grade Germanium (Ge) Single Crystal Wafers

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

Product Overview:
infrared-grade germanium (Ge) single crystal wafers are used for infrared optical systems, thermal imaging, laser applications, and scientific research. These double-side polished germanium substrates feature infrared transmission, thermal stability, and mechanical properties. Custom sizes, thicknesses, and coatings are available to meet listed 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/cm³
* 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

**Features:
* High infrared transmittance (2–14 μm)
* thermal and mechanical stability
* Precision double-side polishing
* 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 transport