An Effortless Approach to Eliminate Bubbles in Conformal Coating Through Solvent Type and Product Selection

Hello Again!  The last time we discussed bubbles in conformal coating, I wrote how to resolve process related root causes.  There are other simple ways to reduce the amount of bubbles:

  • by varying the types of solvents used in a product
  • by using a product that contains a surface tension modifier, hence increasing the rate at which bubbles burst.

If you recall, most of the bubbles are...

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How to Achieve Long Term Conformal Coating Thermal Shock Resistance – It’s All About Selection!

Figure 1: Thermally induced cracking in conformal coating

Does your conformal coating require long term thermal shock testing?   Do you struggle to overcome cracking and adhesion loss with your current conformal coating after 1000 thermal shock cycles?   With the drive for increasing functionality for end devices, and increased life cycles being placed on all electronic assemblies, the need to...

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Synthetic Rubber Conformal Coatings, Industry's Best Kept Secret, Until Now!

What is so special about synthetic rubber conformal coatings?   Why do many high reliability applications require synthetic rubber?  Would synthetic rubber be a better fit for your application?  Synthetic rubber copolymer provides higher operating temperature and exhibits superior mechanical properties compared to traditional materials. The products have been developed to withstand the...

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Easy Techniques to Abate Conformal Coating Wicking

Have you ever experienced uncontrolled conformal coating migration?   Have you had to strip your recently coated boards because conformal coating wicked into non-desired keep out zones?   Wicking is a phen

omenon caused by a combination of low surface tension coating, which is usually characterized by low viscosity, cou

pled with strong capillary forces generated by low standoff gaps possessed...

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Simple Steps to Resolve Conformal Coating Wetting Problems

Does your conformal coating not wet properly? Do you struggle with craters, fish-eyes, or film separation? The culprit could be that the surface energy of your PCB is lower than the surface tension of the conformal coating.   The above defects are discussed frequently with customers on our technical support line, and any time we receive a technical enquiry regarding poor wetting or loss of...

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Potting and Conformal Coating with 2C51 Two-Part Silicone

Have you ever wondered if you can use the same material to pot or conformaly coat your electronics?  HumiSeal has launched a new fast curing, two-part silicone (Humiseal 2C51) that can be easily applied as a conformal coating or as a potting material.  This option allows users to standardize on one product for multiple applications.

Humiseal 2C51 is a high solids, low viscosity, fast curing...

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Straightforward Explanation of the MIL-I-46058C Specification for Conformal Coatings

During your selection of conformal coating you ran in to a specification that you have seen before but not fully understood, MIL-I-46058C.   Conformal coating choice sare vast, but with so many available, how does a user pick the correct one? Are there minimum standards that define what a conformal coating is supposed to do? Thankfully, yes there are. This article will focus on one such...

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Simple Recipe To Avoid Conformal Coating Blush

Your conformal coating film is supposed to be clear and transparent, but it’s cloudy-white and dull…it’s BLUSHING.  This condition is an indication that your coating film is trying to tell you something, and it isn’t that it’s embarrassed.  This blog will help you better understand why your conformal coating film is blushing from acquired moisture contamination and help you eliminate this...

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Simple Techniques to Avoid Bubbles in Conformal Coating

"Have you ever experienced air entrapment in your conformal coating?  We would like to offer some assistance to help you to get rid of those exasperating bubbles in the conformal coating process.

Contrary to what most people think bubbles are not material related, bubbles are mostly caused by process related issues.  Yes, it is true that the conformal coating contents would influence in having...

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How to Establish UV Conformal Coating Curing Process in a Few Easy Steps

UV curing of conformal coatings can appear to be a complicated topic, however a few simple steps will help to correctly set up your production process.   The main difference of UV curable coatingsto the traditional cure mechanisms is the utilization of UV energy to effect the change from a liquid to solid. After this rapid UV curing step the coating is tack-free and the PCB can continue its...

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