Conformal Coating Company

Parylene Conformal Coatings

Parylene is an organic and biocompatible compound that delivers superior protection against all forms of environmental risks. It’s uniquely inert and highly effective at reaching small recesses because of how it forms.

Parylene coating applications take place inside a chemical vapor deposition (CVD) vacuum system, where the products wait inside a room-temperature chamber. After the raw material heats up from a solid to a gas — so much so that the Parylene splits into monomers — the vapors travel to a coating chamber where the molecules cool and polymerize on everything in the chamber. Over time, this builds layers of a polymerized film, microns-thin, and pinhole-free.

Parylene conformal coatings are excellent for applications found in the aerospace, defense, medical device, and industrial products industries. This type of versatility makes it a top choice amongst OEMs.

There are several different types of Parylene, each with their attributes:

  • HZO Guardian Plus™: Best barrier properties, including preventing gas, water vapor, and salt penetration.
  • HZO Guardian Zero™: Highest in dielectric properties.
  • HZO Guardian EX™: Two options available. One is more capable of withstanding higher thermal loads, and the other withstands exposure to UV.

Depending on the application, one form of Parylene can be more beneficial over the other. But in all cases, it provides sophisticated waterproofing for IPX ratings of 7, corrosion resistance, and reliability in the wake of harmful gases.

Pros and Cons of Parylene Coatings

Parylene excels at stopping many threats, like acidic beverages, air pollutants, and other complex chemicals. It’s even safe for implanted medical devices. Parylene’s quality coverage does come at a higher cost than other conformal coatings available, and repairs can be a challenge. But in exchange, Parylene is very durable, making it the prime option for longevity and sustainable impact.

Because of its high dielectric constant, Parylene makes an exceptional barrier against electrical interference for your device. You won’t find a more rugged, environmentally friendly material.



Parylene Conformal Coatings
At A Glance

  • Completely conformal thin-film coating
  • Perfect for protecting mission-critical devices
  • Long-lasting environmental damage protection
  • High dielectric strength, low dielectric constant
  • Microns thin, pinhole-free protective coating


Plasma-Based Nanocoatings

Plasma-based nanocoatings are an ideal choice if you want to protect your electronics from splashes and spills. However, you may want to consider a Parylene coating for complete waterproofing capabilities or to withstand the harshest, most corrosive environments commonly found in industrial settings.

Plasma-based nanocoatings, applied with plasma-enhanced CVD, at micron-thin layers are marginally conformal. Plasma-enhanced CVD works by flowing a precursor gas into the plasma chamber. The gases ionize in an electric field and become plasma, with those ionized materials bonding chemically to the product’s surface and each other to create a barrier. The resulting thickness can range from several nanometers to several micrometers.

At HZO, we possess a wide variety of proprietary materials and applications to provide the best nanocoating services for your specific product. We’re able to formulate combinations that will suit the properties of your device, whether you’re considering conductivity, cost, resistance to particular solvents, or other factors.

Pros and Cons of Plasma-Based Nanocoatings

Plasma-based nanocoatings create consistent coverage for every material surface. And with plenty of treatment options available, they’re an excellent option to explore in adding reliable water resistance properties at an accessible price point. The hydrophobicity of this coating ensures that moisture and dense humidity won’t seep into circuitry and, instead, rolls off. Plus, these coatings provide reliable protection against gases and vapors that can corrode metal components. They offer fast, easy curing with high thermal stability.

Plasma-Based Nanocoatings Conformal At A Glance

  • Great protection for splashes and spills
  • Consistent coverage for material surfaces
  • Reliable against corrosive gases and vapor
  • Moisture and humidity resistant
  • More competitive price-point


Atomic Layer Deposition (ALD)

Atomic layer deposition used to produce conformal coating is related to chemical vapor deposition but occurs on an atomic scale, as the name suggests. One material is heated into a vapor and allowed into the coating chamber, then removed after a uniform film is created so a different substance can be introduced next. Once two or more materials collect on the component, their reactions produce new protective properties and effects.

With the atomic layer deposition (ALD) process, it’s possible to use thin metal and ceramic coatings for your PCBAs.

This process creates coatings on an atomic layer by layer basis. ALD works especially nicely for the most miniature of parts and components, as you can control the application down to nearly an atomic layer.

Since ALD can use many different substances in the process, it’s essential to choose a safe, effective treatment for the composition of your assembly. HZO’s in-depth knowledge of these materials and application techniques will help determine the most useful approach in applying a stable, protective covering for any PCBA.

Pros and Cons of ALD Coatings

When it comes to treating microcircuits and nanocircuits, atomic layer deposition conformal coatings offer the necessary precision for the job. With many combinations available, there’s unparalleled flexibility for meeting the performance specifications you need. This variety makes the costs differ widely as well. We recommend consulting with our engineers to pin down what’s right for your application needs and business purposes.

Like Parylene blending, ALD can take longer intervals to make these layers and complete the process, but enhancements with plasma help.

Atomic Layer Deposition (ALD) At A Glance

  • Ideal for miniaturized components
  • Variety of materials can be used
  • Conformal coating for complex parts


Conformal Coating Services

There are many different approaches to conformal coating today. But only HZO’s turnkey solutions are a modern, streamlined process for all the essential environmental coatings your existing or upcoming products may need. With our Spectrum of Protection™, you have access to a broad list of premium resources and high-volume deposition chambers at your site or ours. Specialized members of our staff can assist with any stage of the design and refine which CVD application will satisfy your specifications.

Choose HZO As Your Conformal Coating Company

We know you can’t leave anything in doubt, which is why we deliver the most comprehensive protection capabilities in the industry. Whether you’re looking to harness plasma-based nanocoating, Parylene and its blends, or the pinpoint accuracy of atomic layer deposition, HZO is willing and ready to help. We’ll give you the most considerable benefits and highest efficiency from the treatment process and secure the life of your product, protecting against corrosion, increasing reliability, and decreasing failure rates.

Request a quote and start incorporating innovations into your devices. Reach out to our team to connect with an expert today!


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