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Formulating Anisotropically Conductive Adhesives for Ever-smaller Electronics

SpecialChem / Andy Extance – Apr 4, 2011

While anisotropically conductive adhesives have been in existence for some time, innovation continues apace as higher-resolution displays and slimmer electronics shrink the space between electrodes. To help deal with the potential short-circuits this causes formulators coat the conductive particles used in the adhesives with insulating layers, and mix them with insulating fillers. Each of these approaches has downsides, but researchers are now devising ways to circumvent even those. When people look at the liquid crystal display on their cell phone or television, they aren't thinking about how the pictures get there. Even if they were, few would entertain the idea that adhesives play a crucial role in turning electrical signals into images. But that's just what anisotropically conductive adhesives (ACAs) do. By forming films that conduct electricity in one dimension but are insulating in the other two, they can connect matrices of electrodes that pass signals to the individual pixels of an LCDs.

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