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LED-Curable Conformal Coatings: The Green Approach to PCB Protection

Posted by Dan Griffin on Mar 24, 2021 8:30:00 AM

Conformal coatings rose to prominence in protection of printed circuit boards (PCBs) about five decades ago. Through their use, early PCB failures due to dust and dirt, liquids, and humidity contamination were greatly reduced or eliminated. This in turn allowed for the longer warranties and improved reliability we see today. Early conformal coatings, many of which are still in use today, were comprised of polymers dissolved in various solvents such as MEK, toluene, or xylene.

An approximate evolution of conformal coating chemistries could be viewed as

  1. solvent-borne acrylics and polyurethanes
  2. waterborne acrylics
  3. synthetic rubber coatings
  4. UV-curable acrylated urethanes
  5. LED UV-curable acrylated urethanes
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Topics: conformal coating, LED technology, Eco-friendly, LED curable conformal coating

Conformal Coating Packaging Options: We Can Help You Decide

Posted by Dan Griffin on Nov 12, 2020 1:34:10 PM

Packaging. Not the most complex subject when choosing a conformal coating, but treat the decision too lightly at your peril. There are a surprising number of options available, each suitable to very specific needs and conditions. In this brief presentation we will discuss, from smallest to largest, the various packaging choices available to you, along with the advantages and disadvantages of each.

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Topics: conformal coating, Conformal Coating Process, Conformal Coating Packaging

How to Make Sure That Your Conformal Coating Actually Conforms

Posted by Dan Griffin on Oct 1, 2020 11:00:00 AM

Take a quick look at the photograph on your right. If you are in the business of PCB manufacturing with conformal coatings, does it frighten or concern you at all? Does the magnified coating appear to truly “conform” to the surfaces evenly? And if not, what effect, if any, might this have on the protection of your PCBs?

First of all, don’t panic. What you see in the photograph is not unusual and is not necessarily a problem. It is important, however, that if you are in the business of applying conformal coatings, you should have a clear understanding of some of the unique challenges they present.

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Topics: conformal coating, silicone conformal coating, Humiseal, Conformal Coating Process

How To Create Your Own Internal Conformal Coating Test Standard

Posted by Chris Palin on Jun 19, 2017 11:00:00 AM

How do you select and test a conformal coating that is right for your specific application? Or maybe you would like to create your own test specification due to any special characteristics of your device’s operating environment? Or depending on your geographical location, you may also be required to use a different testing specification that is dictated by local authorities.

A widely used method to create an internal specification, is to simply select a conformal coating material that meets an existing specification standard. Such standard could be MIL-I-46058C or IEC-60664. However, you must be careful to ensure that the existing standard that you choose, does indeed meet 100% of your requirements. In such cases, you may have to specify test methods from other existing standards.

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Topics: conformal coating, testing procedure

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