SCS Blog
Recent SCS Blogs
Solvent Resistance of Parylene
Parylene variants offer robust solvent resistance, protecting substrates like printed circuit boards (PCBs) and other electronics components. This high level of protection is sustained over a wide temperature range that exceeds typical operating conditions for PCBs. The exceptional solvent resistance of Parylene is attributed to its unique molecular structure, which makes it largely insoluble in... Read More >>
Acrylic vs. Polyurethane Conformal Coating
Acrylic resin (Type AR) and polyurethane (Type UR) are widely used conformal coatings. While they share the same methods of applications and end use, consider their individual properties before deciding which conformal coating is the best for an application. Application Methods Acrylic liquid conformal coatings, which include MG Chemicals 419C, HumiSeal® 1B31 and HumiSeal 1B73,... Read More >>
Liquid Conformal Coating Failure: 6 Common Causes
Liquid conformal coatings frequently play a critical role in protecting medical, electronics, defense, aerospace, LED and automotive applications from contaminants and other potentially hazardous substances. As reliable as conformal coatings can be, they are not infallible. If the preparation, application, and drying processes are not properly managed, for example, conformal coating defects could develop that compromise... Read More >>
Conformal Coating: Spray, Dip, or Brush?
Liquid conformal coatings-such as acrylics, epoxies, silicones and urethane resins–are applied to electronic applications by means of wet methods, primarily brush, dipping (component immersion) or automated/manual spraying. Parylene conformal coating is applied as a gas through chemical vapor deposition (CVD). Material selection is largely dependent on the application or component being coated and its intended... Read More >>
Conformal Coating Applications: Liquid vs Parylene
Conformal coating of an object occurs when an appropriate coating material is applied on-top and around an underlying substrate, to protect it from such environmental and performance concerns, such as chemical incursion and excess moisture. Liquid organic polymer conformal coatings – acrylic, epoxy, silicone and urethane – prevent: Liquid coatings also reduce the incidence of... Read More >>
What Chemical Removes Parylene?
How To Remove Parylene Coating Conformal coatings provide reliable protection for substrate surfaces of printed circuit boards (PCBs) and related electrical components. However, these coatings sometimes require removal for repair or other purposes. Many coating materials can be removed by abrasive, mechanical, plasma and thermal techniques, but chemical methods are typically the most popular for... Read More >>
Different Ways to Deal with Solvents in Conformal Coatings
Option 1: Regularly Measure the Solvent Exposure to Operators Solvents can be safely utilized, however, solvent fumes can be harmful to the operator if not safely monitored. To avoid potential OSHA violations, exposure of the operator to solvent fumes must be regularly measured and recorded. Regularly measuring the exposure of solvent fumes is a low... Read More >>
Does Parylene make my Product Waterproof?
Protecting printed circuit boards (PCBs) and similar electronics from the incursion of water is an essential responsibility of Parylene conformal coating. Suitable Parylene permeation barriers assure no form of liquid passes through to underlying components and that the water vapor transmission rate (WVTR) is minimal. WVTR measures the level of water vapor migration through the... Read More >>
Challenges to Parylene
Ultra-thin and pinhole-free, Parylene conformal coatings provide a number of high-value surface treatment properties such as excellent moisture, chemical and dielectric barrier properties, thermal and UV stability, and dry-film lubricity. At the same time, certain challenging variables can influence the Parylene coating process and should be accounted for in coating design and implementation. Given the... Read More >>
Causes of Parylene Delamination
Delamination Problems of Parylene Conformal Coatings Providing a uniform and pinhole-free substrate coating that is ultra-thin, lightweight and durable, Parylene coatings completely conform to targeted components and assemblies. Parylene chemical vapor deposition (CVD) generates a structurally continuous film. With the appropriate pre-treatment, Parylene penetrates deep within substrate surfaces rather than simply attaching to the exterior... Read More >>
