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Conformal Coatings

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About Conformal Coatings

Conformal coatings encapsulate circuit boards and their electronic components in order to prevent the ingress of moisture, fungus, dust and other environmental contaminants. There are several basic types of conformal coatings. Electrically conductive products provide low resistivity and are often used to prevent electrostatic discharge (ESD), electromagnetic interference (EMI), and radio frequency interference (RFI). They are also used in thick film metallization and to provide electrical interconnections at both the device and circuit board level. Thermally conductive conformal coatings are applied between a heat-generating electrical device and a heat sink in order to improve heat dissipation. They form a thermally conductive layer on the substrate, either between components or within a finished product.  


Products & Services Related to Conformal Coatings

Conductive Adhesives and Compounds
Conductive adhesives and compounds provide an electrically and/or thermally conductive path between components.
Epoxy Adhesives
Epoxy adhesives are chemical compounds for joining components. They require clean surfaces and are valued for their toughness and resistance to chemical and environmental damage.
Gel Elastomers
Gel elastomers are highly viscoelastic polymer gel materials that have excellent shock absorption and damping characteristics. They are available in a variety of material types and grades.
Pressure Sensitive Adhesives (PSA) and Contact Adhesives
Pressure sensitive adhesives (PSA) and contact adhesives adhere to most surfaces with very slight pressure. They are available in solvent and latex or water-based forms.
Silicone Adhesives and Sealants
Silicone adhesives and sealants have a high degree of flexibility and a very high temperature resistance (up to 600° F), but lack the strength of other epoxy or acrylic resins.
Thermoplastics and Thermoplastic Materials
Thermoplastics and thermoplastic materials soften when heated and harden when cooled. They can withstand many heating and cooling cycles and are often suitable for recycling.
Thermosets and Thermoset Materials
Thermosets and thermoset materials are crosslinked polymeric resins that are cured or set using heat or heat and pressure. They generally have a higher resistance to heat than thermoplastics.

Engineering Web: Conformal Coatings - Machine Design

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Conformal-coating-narrows | Machine Design
Conformal coatings protect surfaces and let screws and mating surfaces fit more snugly.
Conformal-coating-narrows5 | Machine Design
Compressed coatings let rotors move past each other with minimal clearance but without friction, even at elevated temperatures.
conformal-coating-narrows | Machine Design
Conformable coatings protect surfaces and let screws and mating surfaces fit more snugly.
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