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Technical Articles

Technical Articles

Resins for potting and encapsulation in the electronics and electrical industries

Posted on 01 October 2009 by Electrolube
Tags: Encapsulation Resins

Resins used for these applications can be of various chemical types. Epoxy resins have been widely used for many years – they are generally hard and tough and exhibit low shrinkage on cure. They are characterised by an excellent level of mechanical properties, good high temperature performance and good adhesion to a wide variety of substrates – chemical resistance is also good. The cross-linking or curing process generally takes place slowly especially where small volumes of resin are involved. Fast cure hardeners can be used but these generate…

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Essential Cleaning for Electronics Assemblies

Posted on 01 October 2009 by Electrolube
Tags: Cleaning

Cleaning is an essential process within electronics manufacture and has been used for many years to remove potentially harmful contaminants during PCB manufacture. Such contaminants include flux, solder and adhesive residues, and other more general contaminants such as dust and debris present from other manufacturing processes. The purpose of cleaning, specifically within the rapidly expanding electronics industry, is to essentially improve product lifetime by ensuring good surface resistance and by preventing current leakage leading to PCB failure.…

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Conformal Coating of Printed Circuit Boards

Posted on 01 October 2009 by Electrolube
Tags: Conformal Coatings

Newly manufactured and cleaned printed circuit boards will generally perform well electrically, but performance will quickly deteriorate due to adsorption of atmospheric moisture, contamination of the surface with airborne ionic material, electrostatic attraction of dust to the surface, condensation etc. In order to avoid these problems boards for more demanding and high specification applications are often conformally coated as the last stage of manufacture.

Conformal coatings are normally applied to circuit boards by dipping or spraying,…

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