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Fused Quartz Substrate 4" 0.2mm (Thin)
$120.00 USD
Thin fused silica (quartz) substrate, 4 inch diameter, 0.2 mm thickness, double-side polished. Reduced thickness for mmWave and sub-THz circuits requiring tight impedance control and minimized dielectric loading.
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Specifications
| Material | Fused Silica (Quartz) / SiO₂ |
|---|---|
| Diameter | 4 inch (101.6 mm) |
| Thickness | 0.20 mm ± 0.01 mm |
| Surface Finish | Double-side polished, Ra < 0.1 nm |
| Dielectric Constant (εr) | 3.78 ± 0.02 @ 50 GHz |
| Loss Tangent (tanδ) | 0.00005 @ 50 GHz |
| Thermal Conductivity | 1.4 W/m·K |
| CTE | 0.55 × 10⁻⁶ /°C (near-zero) |
| Transparency | Transparent (UV to NIR) |
| Notch | Primary flat (32 mm) + secondary flat (18 mm) |
| Purity | 99.995% SiO₂ |
| Operating Temperature | -200 °C to +1100 °C |
Applications
- mmWave 5G/6G Circuits
- Sub-THz Components
- Phased Array Antennas
- Photonic Integrated Circuits