The ABCs of fluoropolymer nano-coatings

What is a fluoropolymer coating?

A fluoropolymer coating is a material comprised of fluorocarbons and characterized by carbon-fluorine bonds.

Chemically inert, fluorocarbons are not susceptible to Van der Waals force. This means they are hydrophobic, non-stick and friction reducing.

Protect Your Circuit Boards With Conformal Coating

Some of the most important pieces of your hardware are minuscule. The high performance and durability of your circuit boards greatly depend on their longevity. These tiny powerful technologies are prone to damage brought about by contamination, dust, fungus, moisture, and other forms of corrosion.

Why is adhesion important for conformal coatings?

The durability and performance of conformal coatings can depend on two basic properties. These are the cohesion and the adhesion of the coating.

Cohesion is the inner strength of a material and is associated with the strength of the molecular forces within the bulk material. Adhesion is the strength of the bonds forming between the conformal coating and another surface.

How can plasma treatment help my conformal coating process?

Cleaning and coating circuit boards for long-term protection has taken place for many years.

The reasons for doing this have always remained the same:

What is Parylene?

Parylene is an organic polymer conformal coating. It is generically known as Poly (p-xylylene).

This thin film coating is linear, amorphous and crystalline (10%), when in polymer form.

The Parylene film is created via a controlled Chemical Vapor Deposition (CVD) process.

This involves the vaporization and subsequent pyrolysis of a feedstock (Dimer), resulting in the formation of a monomer that is then polymerized in a vacuum chamber (at low pressure and at room temperature).

Five key differences between a fluoropolymer coating (FC) and a conformal coating for protecting an electronic printed circuit board or assembly

There are five key differences between a fluoropolymer coating (FC) and a liquid conformal coating when using these materials to protect an electronic printed circuit board or assembly.

They are:

  • Hydrophobic Properties
  • Extremely thin coating
  • No masking
  • Simple application process
  • Fast drying

To find out more click the five key differences for fluoropolymers now.

Key Cost Drivers: Parylene versus Liquid Conformal Coatings

Author: Warren Boomer

I recently wrote an article for Nexus that highlighted the costs for Parylene and how they compare to other liquid coatings. I think its relevant to re-print it here for Thin Film Partner subscribers since I think it has value to most people who are considering Parylene.

We all know coatings like Parylene are considered high-performance solutions. This material has been in continuous use for at least 60 years. We have come to accept it as a superior alternative to many of the liquid coatings available.

MVD – An exciting new technology for Thin Film Partners

Want to apply an nano-scale coating that is completely uniform and conformal across all surfaces, hydrophobic and optically clear, but not wait forever for the deposition process?

Further, would you like that coating at a sensible price?

Then perhaps one of the newest additions to outline of coating processes, Molecular Vapour deposition (MVD), could be a solution for you.

What five factors affect the cost of Parylene coating the most?

No one denies that Parylene coating can be a more costly application process compared to liquid conformal coatings. 

In my 35 years of working in the Chemical Industry and 12 in the Parylene industry I have never heard anyone say - Wow, that’s a low priced process!

Parylene may be more costly, but what it offers are many unique properties that outperform the normal conformal coatings typically used in the industry.

It just may be worth you paying the extra cost.  Usually, you get what you pay for.


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