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The Next Evolution in Conformal Coating Protection

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.

 

 Solving  the Most Common Problems in
 Conformal Coating Application. 

The printed circuit board industry is rapidly evolving. Just think of all the massive technological advancements we’ve seen in the last 30 years! PCBAs evolved at a similar rate. Through this evolution, we’ve noticed two significant trends that cause issues with conformal coating application.

Tight Spacing Challenges
As PCBs and components shrink in size, dense spacing between components makes it increasingly difficult to apply sufficient material coverage.

Increased Complexity & Demands

Smaller, more intricate components are designed to meet higher performance expectations, adding complexity to their application and functionality.

 How?   The short answer: science—
a lot of complicated,  boundary-pushing science.  

We’ve done extensive research on the matter. It’s only natural as we are the initial inventors of conformal coatings. The details are far too complex to discuss in this blog. That said, Chris Brightwell, our Head of Development, has put together a tremendous research paper outlining the experiments and results found in our latest push to address these challenges. 

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The Problem:  Uneven Conformal Coating Coverage

Conformal coating distribution often ends up too thin around corners and too thick in areas prone to accumulation. This imbalance can be just as damaging as under-coverage, leading to potential failures such as:
  • Electro-migration on the coating surface
  • System failures from condensation on the PCA
  • Unrestricted growth of tin whiskers
These issues highlight the need for a solution that ensures precise and consistent coverage across all areas of the PCB.

Our Solution:  HumiSeal SEC Technology

To tackle these challenges, HumiSeal developed the Sharp Edge Coverage (SEC) product line, featuring 1B59SEC and 1A33SEC. These advanced coatings:
  • Adhere tightly around component sides for single-layer PCB protection
  • Offer faster and stronger protection with UV-curing capabilities
Our commitment to innovation in conformal coating technology is detailed in our white paper, Conformal Coatings - New Solutions to Existing Problems. Ready to explore these cutting-edge solutions? Fill out the form to get started today!
 
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HumiSeal is a wholly owned brand of Chase Corporation. To learn more, visit www.chasecorp.com