MG Chemicals Silver Conductive Coating

842UR is a one-part, heat-cured, silver polyurethane coating. It is a smooth, flexible, abrasion resistant coating that provides excellent electrical conductivity and high frequency shielding at a low film thickness. It maintains flexibility at low temperatures, provides exceptional adhesion to a wide variety of substrates, and provides excellent environmental stability. 842UR is designed for large volume board-level or package-level EMI/RFI shielding applications. It can replace traditional metal cap, which reduces cost, board thickness, and mass. Spraying: 1. Mix coating thoroughly with a spatula or mechanized paint mixer. 2. Spray a test pattern to ensure good flow quality. 3. At an approximate distance of 20–25 cm (8–10 in), tilt the board 45° from a vertical position and spray thin and even coat. Use spray-and-release strokes with an even motion to avoid excess paint in one spot. Start and end each stroke off the surface. 4. Wait 20 min before applying another coat to avoid trapping solvent. 5. Rotate the board 90° and spray again to ensure good coverage. 6. Apply other coats until desired thickness is achieved (go to step 3). 7. Let dry for 20 min at room temperature before heat cure. Brushing: 1. Mix coating thoroughly with a spatula or mechanized paint mixer. 2. Use a foam or roller brush to coat the board. Use long, smooth strokes to create an even coat. Selective coating: Custom blended solutions are available and have been verified for use with selective coating machines using both non-atomized and film coating applicators. To inquire about a custom solution tailored to your equipment, contact MG Chemicals’ Technical Support for assistance. Cure Instructions Room temperature cure: Do NOT cure at room temperature. This product will only cure at elevated temperatures. Heat cure: Put in oven at 125 °C [257 °F] for 30 min. —OR— Put in oven at 140 °C [284 °F] for 15 min.

• Surface resistance of 0. 02 Ω/sq. at 7. 5 µm
• Resistivity of 1. 5 x 10¯⁴ Ω. cm
• Excellent toughness and adhesion
• Withstands wave solder temperature
• Designed for robotic spray application