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What Is Conformal Coating?

Application of Wet Conformal Coating Services

Application of Wet Conformal Coating

PCB Conformal Coating Services

Conformal Coated Boards Under UV Light


Circuit Board Conformal Coating Services

Circuit Board - Conformal Coating

Paryelen Conformal Coating - Vapor Deposition

Parylene - XY Vapor Deposition Conformal Coating Clean Room Class 10,000.

Conformal coating involves applying a thin, protective layer of a high performance polymeric to a PCB (or designated target). Conformal coatings are designed to form protective chemical barriers over finished electronics assemblies to protect them against extreme environments. Conformal coatings protect against corrosion and provide added protection against the formation of tin whiskers. These types of severe conditions include:

  • Electrical leakage
  • Exposure to moisture
  • Salt, Fog and other corrosive threats
  • Temperature fluctuation, Shock and Vibration
  • Fungus
  • Dust


Your Guide To Conformal Coating

One of the most critical considerations for PCB coating is choosing the optimal coating method for your specific product or application. Product volume, application speed, uniformity, and cost effectiveness are just a few factors to consider when choosing between conformal coating methods. Coating methods can also be applied manually by a skilled technician—such as in brush or spray coating—or through an automated process depending on your specific requirements.


Brush conformal coating methods involve using a brush to apply conformal coating manually and selectively to circuits and is ideal for a wide variety of applications, including coating repairs.


Dip conformal coating involves dipping a PCB or other components and fully submerging it into the desired coating and is ideal for high-speed, high-volume complete PCB protection.


Spray conformal coating involves using automated equipment or a manual technician to apply selected PCB coating. This method provides pinhole-free coating and a higher quality finish than brush or dip methods and is ideal for larger components.

Vapor Deposition

Vapor Deposition involves using a chemical vacuum polymerization process to effectively seal your PCBs with a uniform Parylene coating. Vapor deposition is a specialized application process that coats almost every possible surface on LED’s and offers extremely low permeability, added moisture, and solvent protection. 

Thermal Curing Services

Our heat curing mechanisms can be applied to single or multicomponent systems in order to accelerate the curing process or cause the system to polymerize. Thermal curing is best utilized as a secondary cure mechanism for UV cure, moisture cure, evaporative cure, or other instances in which a single curing mechanism is insufficient to gain the curing properties required.

It is important to consider the thermal sensitivity of your circuit boards and components prior to thermal curing your PCB. Not sure where to start? Get in touch with a PRS expert and learn more about how our complete conformal coating curing services can meet your industry needs.

Conformal Coating Thickness Measurement Services

Because Plasma Ruggedized Solutions offers extensive conformal coating services with varying application methods, it is important to evaluate the thickness of your conformal coating to understand how heat entrapment, increased weight, and additional factors are impacting your printed circuit board. Our current thickness measurement methods include:

Digital Drop Gauge

The drop gauge measurement approach utilizes a series of notches with an established length that is placed on the surface of the board while the coating is still wet. The collected measurement is then approximated based on the percent of solids in the coating in relation to the wet coating thickness.


Measurements of the cured coating are taken at several locations on one side of the board and then used to calculate the approximate thickness and uniformity of the coating. This method is not ideal for hard coatings that do not deform under pressure.

Filmetrics (mainly Parylene applications)

Measurements are taken by light reflection off the substrate and then analyzed over a range of wavelengths. Light reflections are employed from the top and bottom interfaces of the film. This results in characteristic intensity oscillations in the reflectance spectrum. Thus, the thicker the film the more oscillations are present in the reflectance spectrum.

Advanced Conformal Coating Services

Conformal coatings are essential for protecting against corrosion and extreme environments. Our processing and technological advancements help improve the overall quality of all products in our industry, allowing us to give you the finest state-of-the-art circuit board coating services possible We offer testing, advanced cleaning and Plasma applications with both invasive and noninvasive laboratory services to inspect each assembly before applying coatings, and use innovative conformal coating materials such as Blue Spark™Kronos-10, and Kryptos-17. Additional advantages to choosing Plasma Ruggedized Solutions coating include:

  • Advanced Thin film applications (angstrom level) than other coating processes
  • Excellent mechanical and thermal-resistant coating materials
  • Water, chemical and corrosion-resistant properties
  • Reduces vibration effect for circuit boards
  • Meets FDA requirements and military specifications


Interested in exploring the conformal coating possibilities offered by PRS? Learn more about our conformal coating services or contact us for more information.

Conformal Coating Removal And Stripping Services

Whether you need to access your PCB or repair a poor conformal coating application, the process of removing conformal coatings without disrupting the design/wiring of your PCB is extremely challenging. Chemical stripping offers a series of challenges due to coating resistance, moisture resistance and application inconsistencies from manual PCB removal. The right solvent-based, physical (subsonic velocities with reduced media) and plasma-based methodologies to remove several types of circuit board coatings varies by chemical composition and device, including:

  • Acrylic
  • Urethane
  • Silicone
  • Parylene
  • Nano Chemistries
  • Epoxies

Why Work With Plasma?

While our state-of-the-art material application concepts are constantly evolving, we have always operated on four major structural pillars:

1. High-quality NADCAP, AS9100 and NASA-certified engineering services.

2. A constant drive for developing process and safety control.

3. A quality first/customer-centric mentality centered on open and honest communication.

4. Continuous improvement performance (CIP) culture for the empowerment of both our customers and employees.

Contact Plasma Ruggedized Solutions Today for Conformal Coating Services, FIPS Compliance, and More

Plasma Ruggedized Solutions is the industry leader in FIPS compliance, potting & encapsulation, and conformal coating services. PRS works across industries, providing solutions for a variety of applications. 

Not sure which application method is right for you? Get in touch with a PRS expert and learn more about our complete conformal coating services.