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2708 Datasheet(PDF) 2 Page - 3M Electronics |
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2708 Datasheet(HTML) 2 Page - 3M Electronics |
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2 / 4 page ![]() Table 2: Typical physical properties Not for specification purposes. All values @ 25°C unless otherwise specified. Properties Fluorinated Polymer Coating Appearance Transparent, light yellow to orange (depending on thickness) Coating Thickness 0.4 - 5.0 microns (depending on application method) Solvent and Chemical Resistance Resists a variety of solvents and chemicals. Dissolves in acetone. Tg (Glass Transition Temperature) 53°C (127°F) Thermal Stability of Dry Film MIL-B-81744A Repellent to chlorinated silicone oil after 24 hours at 175°C Contact Angles (Static, Dip Coated/Dried on Glass Substrate) 105° (water), 65° (hexadecane) Refractive Index 1.38 Solder-Through Repairability Yes (see SDS for thermal decomposition products) Non-Flammable Meets UL 94 V-0 Coefficient of Thermal Expansion - TMA 88 µm/(m-°C) Thermal Conductivity 0.1 W/m*K Dielectric Constant @30% RH per ASTM D150 3.2 (@1kHz) Dissipation Factor @30% RH per ASTM D150 0.001 (@1kHz) Dielectric Breakdown Strength @20°C, 30% RH per ASTM D149 2500 V/mil *Measured contact angles can vary based on the type of surface, surface roughness and the application method. * The U.S. EPA defines a VOC as “any compound of carbon, excluding carbon monoxide, carbon dioxide, carbonic acid, metallic carbides or carbonates and ammonium carbonate, which participates in atmospheric photochemical reactions, except those designated by EPA as having negligible photochemical reactivity.” 3M™ Novec™ 7200 Engineered Fluid is VOC exempt per the U.S. EPA. PGMEA is <5% of the solvent. PGMEA is VOC per the U.S. EPA. Can serve as: • Anti-migration coating for displays, spindle motors or lubricated electronic parts • Anti-corrosion coating for a variety of materials and components • Designed for moisture and corrosion protection of printed circuit boards and electronic components • Is UV (ultra violet) light detectable for easy identification of coating and quality control • Low surface energy allows lubricating oils, silicones, photoresist solutions, etc. to bead and drain freely from coated surfaces • Helps provide repellency and anti- wetting properties against liquids – water, hydrocarbons, silicones and photoresists • Helps protect against corrosive gases and vapors in addition to liquids • The polymer can endure up to 175°C for 24 hours and maintain repellency • Essentially insoluble in solvents such as heptanes, toluene and water • Adheres to a variety of materials (metals, glass, ceramics, polymers, composites, laminates) • Thermally and electrically stable with good dielectric properties • Easy to apply – dries quickly without the need for post-application curing • Excellent surface wetting, especially under low standoff SMT components • Allows solder-through repairability • Non-flammable, non-ozone-depleting, and low in toxicity • Low in global warming potential (GWP), RoHS compliant and and contains less than 5% volatile organic components (VOCs)* Applications Features Helps provide: • Moisture, chemical and corrosion protection for printed circuit boards and their components • An easy and cost-effective alternative to conformal coatings • Anti-wetting, anti-stiction, anti-migration and anti-corrosion properties in many diverse applications |
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