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Dan Griffin

Dan Griffin
HumiSeal Midwest Account Manager
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Recent Posts

Conformal Coating Your PCBs: How to Prepare for the New 2020 Chinese VOC Limitations

Posted by Dan Griffin on Feb 10, 2021 10:30:00 AM

March 4th of 2020 represented a potentially seminal date for both suppliers and manufacturers within the printed circuit board industry. This was the date of release of four updated Guobiao or “GB” standards related to the VOC content and other harmful substances allowable within supplied inks, adhesives, and protective coatings in China. This change in regulations is the result of China’s three-year action plan begun in 2018. The plan is intended to improve air quality through reduction of VOC emissions by at least 10% as compared to 2015 levels.

The new standards are straightforward but can become difficult to understand as they are often implemented by city and by region.

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Topics: Low VOC Applications, VOC China, LTX Coatings, GB standards, VOC emissions, Sustainability

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

Advantages & Characteristics of LED Curable Conformal Coatings

Posted by Dan Griffin on Sep 3, 2020 2:00:00 PM

UV curable conformal coatings have attained widespread use in applications requiring fast through-put times, such as automotive, white goods, and industrial control manufacturing. In addition to speed of cure, UV curable conformal coatings provide the advantage of high physical protection and chemical resistance for electronic systems. Traditionally the UV curing of coatings is an energy intensive process. One that uses high-power mercury discharge lamps, which as a result of use produce considerable amounts of heat and ozone. The recent introduction of new, high-output LED UVA light units allows for the successful cure of conformal coatings by using between 365nm and 395nm wavelength of UVA light, effectively curing with minimal heat and no ozone generation.

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Topics: UV Curable (Type AR/UR), Conformal Coating Process, conformal coating application, UV Curing, UV light, UVA

Electric Vehicles: Polymers for Performance, Reliability, & Protection

Posted by Dan Griffin on Jul 30, 2020 1:00:00 PM

Adoption of plug in -electric vehicles (EVs) has been slower than many expected, but there is little question the next few years will see adoption accelerate. Your hypersensitive dog will have to find new visitors to harass when your delivery drivers arrive without notice, driving to your door silently in all-electric commercial vans. Many of your favorite suppliers and stores have already ordered these vehicles. Game-changing battery and charging developments are eliminating range anxiety, and autonomous driving controls and safety innovations are in the final stages of building our trust.

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Topics: Thermal Interface Materials, Vibration Suppression, Thermosink, Conformal coating benefits, EMI conductive gaskets, EV, Electric Vehicle

How to Calculate the Cost of Conformal Coating on a PCB?

Posted by Dan Griffin on Apr 16, 2020 11:00:00 AM

One of the most basic and common questions we at HumiSeal® are asked by both existing and potential new customers is,

“How much does it cost to conformally coat my printed circuit boards?”

Since conformal coatings are usually sold in liquid form by the liter or gallon, it is necessary to go through a fairly basic calculation that we will present here.

The simplest and most common way to evaluate cost is by determining the cost in dollars of coating per PCB.

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Topics: Conformal Coatings, Conformal Coating Costs, Protection for PCB

Understanding the Importance of the Moisture Vapor Transmission Rate of Conformal Coatings

Posted by Dan Griffin on Mar 25, 2020 10:00:00 AM

A critical function of conformal coatings is to protect PCBs and electronics from damage caused by moisture and humidity. In this discussion, we will attempt to answer some of the more common questions we often hear regarding the level of protection you can expect from a conformal coating.

Are conformal coatings waterproof?

The above is probably the most common question and most misunderstood subject in the area of PCB protection

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Topics: Environmental Conditions, Conformal Coating Process, Conformal coating benefits, waterproofing silicones, waterproofing

What is PCB Surface Energy and How Does It Affect Conformal Coating

Posted by Dan Griffin on Feb 24, 2020 10:15:00 AM

In previous articles, we discussed common defects in conformal coatings related to surface energy issues. These included issues such as

  • fish eyes
  • lack of coating coverage
  • poor bonding
  • delamination

We received significant feedback, and the most common response was to ask for more specifics about just what surface energy is anyway.

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The Potential Cost of NOT Conformal Coating Your PCB

Posted by Dan Griffin on Jan 23, 2020 10:00:00 AM

The PCB industry continues to evolve with ever increasing demands for efficiency and manufacturing cost reductions. From the design phase onward, suppliers and contract manufacturers are being asked by their OEM overlords for increased performance at lower and lower costs. An obvious potential source for cost reduction is the use of alternative cheaper raw materials or their elimination where possible. At some point in the discussion, it is sometimes asked,  “Why don’t we just eliminate the conformal coating?” or "Are conformal coatings necessary".

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Topics: conformal coating application, Conformal Coating Costs, Conformal coating benefits, Protection for PCB

Protective Gels: The Next Level of Protection for Your PCBs

Posted by Dan Griffin on Dec 16, 2019 9:57:33 AM

Conformal coating of printed circuit boards (PCBs) has resulted in a steady evolution in performance and protection for modern electronics. It has allowed for lightweight and reliable controls in industries such as automotive and aerospace among others. This has brought about the possibility of increased length of warranties as well as fewer failures and claims. Nevertheless, original equipment manufacturers (OEMs) and consumers continue to raise their standards and expectations for longevity and reliability to levels unimagined just 10 years ago. In the automotive industry, as an example, thermal cycling testing might have involved as few as 10 or 50 cycles in the recent past. That standard is now often 500 or even 1000 cycles with no apparent ending in sight.

So what do I do when conformal coating is not enough?

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Topics: Conformal Coatings, Protection for PCB, Protective Gels