Conformal Coatings Take a Leap Forward NanoSlic: A Generation Ahead

Where would you be without your mobile phone?  Your laptop?  Your vehicle?

Today’s culture and business depend on a network of electronics that power our lives, from communication to education to entertainment to industry.

We immerse these devices in a huge range of environments, often spanning greater variances in temperature, moisture, and chemical conditions than our own bodies are made to withstand.  Protection is a key consideration when these products are made, and is achieved through conformal coatings.

What are Conformal Coatings?

Conformal coatings are microthin protective layers, generally 25-250 μm thick, designed to laminate printed circuit boards and protect them from moisture, abrasion, chemical, and environmental damage.

Through application processes such as vapor deposition, spraying, brushing or dipping, these coatings conform to the profile of a printed circuit board, sealing its components.  The particular chemistry and the level of protection needed determine the thickness of the application.

Most conformal coatings are transparent. Others contain a fluorescing dye that illuminates under UV light during an inspection. This ensures the coating fully encapsulates the assembly without voids, bubbles, or pinholes.

Types of Conformal Coatings

There are 5 major types of conformal coatings on the market today, differentiated by their base polymer chemistry, strengths, and cure method.

A 6th type of chemistry is a relative newcomer, the so-called nano conformal coatings.

Here fluorine-containing materials are put into a vacuum deposition chamber along with a part to be coated. The fluorine-containing material is then deposited on, theoretically every surface of the part, interior, and exterior providing a nanometer thick protection from water, chemicals, etc.

 

 

Application Methods

 

Acrylic

Spraying

Dipping

Brushing

Epoxy

Spraying

Dipping

Brushing

Polyurethane

Spraying

Dipping

Brushing

Silicone

Spraying

Dipping

Brushing

Paralene

Vapor

Deposition

Advantages

Ease of rework

Simple drying process

Good moisture resistance

Relatively HI temp

High hardness

Abrasion resistance

Low CTE

Higher Tg

Good dielectric properties

Good moisture resistance

Solvent resistance

Less reversion potential

Abrasion resistance

Hi and Low temp performance

Flexible

Good moisture resistance

High dielectric strength

Hydrophobic

Excellent uniformity

Chemical inertness

Low outgassing

Low dielectric constant

Hydrophobic grades

Why Apply Conformal Coatings?

Conformal coatings do an excellent job of protecting printed circuit boards. Their contoured, close-in adhesion to the three-dimensional variations in any surface give tight coverage, prevent delamination, and vigorously resist removal.

Coatings today vary from silicone, acrylic, urethane, epoxy, paralene and more.  Considerations between types include cost, application method, temperature, usage environment, dielectric properties and resistance to moisture, abrasion, and solvents.

NanoSlic’s unique hybrid formula takes this field a lead forward, achieving top marks in each environmental scenario, providing key hydrophobic and oleophobic properties, and transcending the inherent weaknesses older technologies make you choose between.

conformal spray

Learn how NanoSlic’s revolutionary ceramic platform chemistry can help you protect your substrates.

spacex-101795

Performance

Conformal coatings are particularly important in automotive, military, aerospace, marine, lighting, industrial and green energy applications where exposure to the elements is significant. But the use of electronics in industrial, domestic and mobile applications is driving the need for greater protection through the use of conformal coatings.

Various industrial and military specifications categorize conformal coatings by their design and performance criterion. These specifications assist users to select the appropriate coating for their application.

Specifications include:

  • IPC-CC-830B
  • MIL-I-46058
  • UL746E

The key to NanoSlic’s proprietary formula is the nanometer-thick hydrophobic and oleophobic outer shell. NanoSlic utilizes a ceramic platform chemistry meant to withstand some of the harshest environmental factors.

NanoSlic’s essential layer of protection provides a permanent waterproof nanocoating designed to protect your capital investments against water, oil, chemical corrosion and abrasion through its outstanding hardness, modulus, and flexibility.

NanoSlic has surface contact angles of 107°/water and 64°/n-hexadecane, causing water and organic based materials to bead up and roll off. This results in a low energy, slippery surface that reduces drag, friction, and heat build-up.

As the coating dries, highly non-polar molecules align and form the surface. Immediately below, the solvent polymerizes into an inert silica-based structure. On the surface of the printed circuit board, the polymer chemically bonds to the hydroxyl groups. As a result, the dual-layer nature of NanoSlic results in both a high degree of adhesion and protection.

The protective coating improves the performance and durability of industrial surfaces. The anti-corrosion properties of offers protection from moisture, oxidation, rust, and many other environmental elements.  The high adhesion ensures complete and permanent coverage.

NanoSlic offers a new approach to conformal coating technology.

See what next-generation protection is like.