Five reasons to use custom masking boots in a conformal coating process

The problems of masking and de-masking Parylene on a circuit board assembly compared to traditional liquid conformal coating

There are several reasons why Parylene conformal coating has a more difficult masking and de-masking process compared to normal liquid conformal coatings.

These reasons include:

The science behind thin film Nano-coatings in protecting electronic circuit boards from harsh environments

Nano-coatings are being used all the time to protect electronic circuit board assemblies.

This is because the base materials they are formulated from are fluorinated polymers that have very different properties to traditional conformal coatings.

So, how are the Nano-coatings different to conformal coatings?

To understand the properties of a Nano-coating you have to understand what a fluoropolymer coating is made of.

Five key facts about plasma cleaning and surface treatment

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Here are five key reasons to use plasma cleaning and surface treatment to improve surface properties:

How was the new Molecular Vapor Deposition (MVD) technology developed for protecting electronic circuit boards?

The Molecular Vapor Deposition (MVD®) process was found in 2003 by the SPTS MVD group located in San Jose, California.

SPTS provided Nano-film technology processing, equipment and coating services, supplying to multiple markets including:

Five key facts about Parylene for protecting electronic circuit boards

Parylene is a high performance coating used to protect electronic circuit boards against environmental attack.

It is an organic polymer thin film that 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).

Why use masking boots in a conformal coating process?

Custom masking boots can provide protection for many different types of components on a circuit board from ingress of coatings.

In fact, they can form an integral part of a full masking solution in all of the conformal coating application techniques including batch and selective robotic spraying (as an alternative to difficult technical programming), vertical and horizontal dipping and chemical vapour deposition (CVD) processes such as Parylene and atomic layer deposition (ALD).

Ten reasons to use Molecular Vapor Deposition (MVD) in protecting electronic circuit boards

Molecular Vapor Deposition (MVD) is a new coating from Thin Film Partners that uses a hybrid coating process of alternating layers of ALD (Atomic Layer Deposition)  and CVD (Chemical Vapor Deposition) films combined with a hydrophobic final top coat.

The MVD method uses multiple alternate layers of these ultra-thin coatings with differing properties to build a completely protective coating.

Why use silicone (SR) conformal coatings to protect electronic circuit board assemblies?

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Silicone (inorganic) conformal coatings can be very different in nature to the organic chemistry coatings like the acrylics and polyurethane materials.

For example, they tend to have a much wider temperature range of operation compared to the other conformal coatings.

Do you need UL qualification for your conformal coating?

In conformal coating, there are many International, National and internal company standards for manufacture of coating materials, processing and inspection.

The UL standards (and qualification) are used to qualify a conformal coating material to a certain specification. Therefore, it is a material manufacture standard only.

The question of whether a conformal coating actually needs the UL qualification to the standard is down to whether the test regime is relevant to the user of the conformal coating.


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