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Hard-To-Bond Materials

By Cova Scientific • March 30, 2017

Some materials that are prohibitively difficult to bond, and chemical adhesives should be cautiously considered due to their inferior bonding capabilities.

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Anisotropic conductive adhesives (ACAs) are a group of electrically conductive adhesives that exclusively conduct across the bond-line.

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Silver Epoxy

By Cova Scientific • March 13, 2017

Although silver is expensive it's still the most common conductive epoxy filler. Particles are highly conductive and available in useful shapes and sizes.

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Solder outperforms epoxy in regards to electrical resistance, and therefore epoxy is generally only chosen due to specific assembly constraints.

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Compares electrical resistance of neat, silver, silver coated glass sphere, nickel, and carbon/ graphite filled epoxy adhesives.

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What's the difference between isotropic and anisotropic adhesives? In this post we briefly explore the differences.

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Thermally conductive conformal coatings are formulated with metal oxides to provide thermal conductivity without decreasing electrical resistance.

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Epoxy resins can be filled with electrically conductive metals to achieve low electrically resistivity and compete with solder in many applications.

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Cationic UV epoxy resins can be formulated to cure between opaque substrates. This "dark cure" requires light to activate, but not complete, the reaction.

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Cationic epoxies are UV curable, but aren't inhibited by oxygen like free radical alternatives. They do however have their own airborne weakness: moisture.

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