Blog

Developing Conformal Coatings for the 21st Century: An Ever-Changing Landscape

Posted by David Greenman on Nov 29, 2023 3:49:37 PM

Before we look at conformal coating in the 21st Century, it is worth looking at how our industry has changed since the 20th Century and the effect these changes have had on reliability. 

30 years ago, we had:

  • Through-hole PCAs with axial components and wide conductor spacing (see fig. 1)
  • Round axial components that were easy to conformably coat
  • Wide conductor spacing (causing a few problems with dendritic growth)
  • Leaded solder
  • The widely adopted practice of cleaning before conformal coating

Fig. 1

Now move forward 30 years. In that time, surface mount components have been developed that are predominantly square with sharp edges, conductor spacing has been reduced, and packing densities have increased to levels never dreamt of in the past (see fig. 2). 

Read More

Topics: Conformal Coatings, Sharp Edge

Tired of Masking Conformal Coating Applications?  Try Selective Dip Coating Instead

Posted by David Greenman on Nov 21, 2023 3:02:41 PM

When conventional coating methods such as hand spray, total dipping or robotic selective coating don’t provide the protection required, there is always selective dip coating.

What is selective dip conformal coating?

Selective dip coating is a process whereby the substrate rather than globally immerised in the coating, is discreetly coated in desired locales.  The technique in one form or another, has been around for over 25 years and is used with both classic solvent-based coatings and 100% UV cure conformal coatings.

Read More

Topics: Conformal Coatings, Humiseal, Selective Dip Coating, Electronic Protection

Counterfeit Conformal Coatings: A Real Problem with Real Consequences

Posted by Chase Corp Editor on Oct 5, 2023 11:58:19 AM

Counterfeit conformal coatings have infiltrated the electronics industry, posing a significant threat to device reliability. These counterfeit coatings may look like genuine products, but they lack the quality and protective properties required for electronic applications. Here are some reasons why counterfeit conformal coatings are causing failures:

Read More

Topics: Conformal Coatings, counterfeit

Sharp Edge Coverage: Solving 3 of the Biggest Problems Facing Modern Conformal Coating Application

Posted by Dan Griffin on Sep 21, 2023 10:40:43 AM

Conformal coatings have a long and storied history with printed circuit boards. A good conformal coating protects PCB components from moisture, corrosion, contaminants, and additional PCB threats like vibration and thermal shock. Coatings are a complicated science, and there isn’t one best coating or application method for every job. These choices are dependent on the design, use case, and assembly of the PCB. For instance, manual brushing PCB coating material is a slow, tedious process; but for small batch applications, it’s quite cost-effective.

Regardless of the chosen method, there are fundamental application errors that can occur, leading to defects forming in the coating which ultimately limit the functional service life of the PCB.

Read More

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

Maximum Durability and Flexibility: UV550 LED-Curing Conformal Coating

Posted by Dan Griffin on Jul 31, 2023 11:49:08 AM

Conformal coating technology is on a continuous path of improvement, and we're excited to say the latest step on that path just happened. UV550 is the most recent innovation from HumiSeal, continuing the trend of industry-defining capabilities in the conformal coating space. This is to be expected from the original inventors of conformal coating material. But what sets UV550 apart from the rest?

Let's discuss how the ever-changing requirements of the automotive and white market space fueled the thresholds this uv-curable material attains, especially with regard to its durability under the most extreme thermal and mechanical cycling conditions.  

 

Read More

Topics: UV Curable (Type AR/UR), Conformal Coatings, UV Curing, UV550

The Next Stage of Total PCB Protection: Sharp Edge Conformal Coatings

Posted by Dan Griffin on May 18, 2023 2:11:10 PM

We at HumiSeal are no strangers to conformal coatings; and if you’re reading our blogs, it’s likely you’re familiar with these coatings as well. The word “conformal” is descriptive of the function of the coatings which are expected to spread and conform evenly across all surfaces that are to be protected. This uniform and even distribution is necessary to protect delicate electronic components from things such as humidity, water, vibrations, and thermal damage (to name a few).

Read More

Topics: Conformal Coatings, Conformal Coating Troubleshooting, Sharp Edge

Get the Best Results When Manual Brushing Conformal Coatings

Posted by Vlad David on Nov 9, 2022 10:54:30 AM

Manual brushing is just one of many methods commonly used for applying conformal coating materials to PCBs and other components. It is a hand-applied method that requires little investment into automation or equipment. With practice, it can be one of the simplest methods available, especially for small-batch production or isolated applications.

Read More

Topics: Conformal Coatings, conformal coating application, Manual Brush

Protective Coatings and Polymers for Hydrogen Fuel Cell Electronics

Posted by Jacek Knop on Jun 30, 2020 2:45:04 PM

Modern hydrogen fuel cell technologies require ever more sophisticated and reliable electronic control systems to assure both safety and longevity. Hydrogen fuel cells are gaining in popularity in critical industries including automotive, aerospace, ocean transportation, military, and power microgrid systems among others. Protection of printed circuit boards and their components from physical, chemical, and thermal damage is essential to produce robust and reliable fuel cell systems for demanding applications.

Read More

Topics: UV Curable (Type AR/UR), Conformal Coatings, Humiseal Blog, Conformal coating benefits, UV Curing, microgrids, renewable energy

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.

Read More

Topics: Conformal Coatings, Conformal Coating Costs, 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?

Read More

Topics: Conformal Coatings, Protection for PCB, Protective Gels

Subscribe Here!

Recent Posts

Request FREE Sample

Posts by Topics

See all

Subscribe Here!

Recent Posts

Posts by Topics

See all