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EUBO Conformal Coating
Time:2014-03-17    Author: EUBO Synthetic Grease    Key word:

Product introduction 

        EUBO Conformal Coating material is applied to  to act as protection against moisture, dust, chemicals, and temperature extremes that, if uncoated (non-protected), could result in damage or failure of the electronics to function。 When electronics must withstand harsh environments and added protection is necessary, most circuit board assembly houses coat assemblies with a layer of transparent conformal coating rather than .

EUBO Conformal Coating    

Applications

  Precision  may suffer degraded accuracy if insulating surfaces become contaminated with  substances such as fingerprint residues, which can become weakly  in the presence of moisture. (The classic symptom of micro-contamination on an analog circuit board is sudden changes in performance at high humidity, for example when a technician breathes on it). Furthermore, a suitably chosen material coating has proved to actually reduce the effects of  and vibrations on the circuit and its ability to cope in extreme temperatures。

  For example, in a chip-on-board assembly process, a silicon  is mounted on the board with an adhesive or a  process, then electrically connected by , typically with .001-inch-diameter gold or aluminum wire. The chip and the wire are very delicate, so they're encapsulated in a version of conformal coating called  This prevents accidental contact from damaging the wires or the chip。 Another use of conformal coating is to increase the  rating of a dense circuit assembly; an insulating coating can withstand a much stronger  than air, particularly at high altitude.

EUBO Conformal Coating

  With the exception of , most organic coatings are readily penetrated by water molecules. A coating preserves the performance of precision electronics primarily by preventing ionizable contaminants such as salts from reaching , and combining there with water to form a microscopically thin  film. For this reason, coating is far more effective if all surface contamination is removed first, using a highly repeatable industrial process such as  or semi-aqueous washing in a special machine。 Extreme cleanliness also greatly improves adhesion。 Pinholes would defeat the purpose of the coating, because a continuous contaminant film would be able to make contact with the circuit nodes and form undesired conductive paths between them。

EUBO Conformal Coating 

Coating methods

  The coating material can be applied by various methods, from brushing, spraying and dipping, or, due to the increasing complexities of the electronic boards being designed and with the 'process window' becoming smaller and smaller, by selectively coating via robot. Different methods of curing / drying are available depending on the conformal coating material.

EUBO Conformal Coating

 
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