EMI Shielding Coating
CAS Number: 7440-22-4
EMI shielding coating is a conductive paint or spray formulation containing silver, copper, or nickel particles designed to attenuate electromagnetic interference on PCBs, enclosures, and electronic housings. It provides effective shielding effectiveness typically exceeding 60 dB across a broad frequency range. Used extensively in telecommunications, medical devices, and automotive electronics to meet EMC regulatory requirements.
Technical Specifications
| adhesion | Cross-cut adhesion 0 (ISO 2409) |
| appearance | Dark gray or silver liquid |
| filmThickness | 15–50 µm |
| conductiveFiller | Silver, copper, or nickel |
| surfaceResistivity | <0.1 Ω/sq at 25 µm |
| shieldingEffectiveness | >60 dB at 1 GHz |
Applications
- PCB-level EMI shielding enclosures
- Plastic housing EMI coating
- Cable shielding and gasket coating
- Medical imaging device shielding
- 5G module enclosure shielding
Key Features
- Broadband EMI shielding effectiveness >60 dB
- Sprayable or brushable for complex geometries
- Good adhesion to plastics, metals, and composites
- Passes FCC and CE EMC test requirements