Dielectric Coating
CAS Number: 63148-62-9
Dielectric coating is an electrically insulating polymer or ceramic thin film applied to electronic substrates, PCBs, and semiconductor surfaces to provide electrical isolation, voltage withstand, and environmental protection. Formulations include polyimide, parylene, and silicone-based systems offering different combinations of dielectric constant, thermal stability, and mechanical flexibility. Used where conformal insulating coverage is required on complex geometries.
Technical Specifications
| appearance | Clear or amber liquid/film |
| filmThickness | 1–50 µm (spin or spray coat) |
| volumeResistivity | >10¹⁴ Ω·cm |
| dielectricConstant | 2.5–4.5 (cured) |
| dielectricStrength | >100 kV/mm (thin film) |
| operatingTemperature | -55°C to +250°C |
Applications
- High-voltage PCB insulation coating
- Semiconductor wafer passivation coating
- Flexible circuit interlayer dielectric
- Transformer coil insulation
- MEMS device insulation layer
Key Features
- High dielectric strength for voltage isolation
- Conformal coating on complex 3D surfaces
- Thermal stability for high-temperature applications
- Available in photopatternable grades for IC fabrication