Parylene Coating Blog by Diamond-MT

How thick should silicone conformal coating be applied?

Posted by Sean Horn on Tue, Oct 09, 2012 @ 06:51 AM

Silicone conformal coating is quickly becoming a very popular choice for conformal coating.  Many people are asking for silicone coating because of its excellent moisture resistance, quick drying nature, and high temperature capabilities.  It is also one of the easiest conformal coatings to work with.  In order for the coating to function at its optimum level, it has to be applied at the proper thickness.

Maintaining proper thickness for silicone conformal coating is critical because it is applied very thick compared to other conformal coatings.  If a coating is applied too thick, it may create excessive stresses on solder joints and components (particularly glass-bodied components).  If a coating is applied too thin, it may not reach the optimum properties described on the Technical Data Sheet.  For this reason, the IPC created the J-STD-001 to regulate and standardize the thickness that coatings are applied at.  For silicones, the J-STD-001 calls out 0.00197 to 0.00827 in.  Our operators strive to hit between .002” and .008” for silicone applications.

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Tags: conformal coating, silicone conformal coating, conformal coating thickness, conformal coating methods, conformal coating rework, automated conformal coating robot

Why Use an Automated Conformal Coating Spray Robot

Posted by Sean Horn on Mon, May 21, 2012 @ 06:39 AM

A typical conformal coating selective robotic spray process consists of a programmable XYZ coordinate platform with a valve or valves attached to a controllable arm, depositing coating onto a printed circuit board in areas specified by the programmers of the system.  An example of this system is the  MACCS 400.

 Technology varies between the platforms and the valves but essentially they achieve the same result.  The goal is to deposit coating where you want it, removing the issue of masking which is required in batch processing with dip or spray booths.

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Tags: conformal coating, conformal coating equipment, conformal coating machines, automated conformal coating robot, MACCS 400