Why use a conformal coating to protect your electronic circuit board assembly?

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A conformal coating protects the circuit board during its lifetime of use

A conformal coating is a protective non conductive dielectric layer that is applied onto the printed circuit board assembly surface to protect the electronic assembly during its working life.

The coating protects from damage due to contamination, salt spray, moisture, fungus, dust and corrosion caused by harsh or extreme environments.

The coating is usually used on electronic products that are exposed to adverse environments where heat, chemicals and / or moisture are prevalent.

Conformal coating also can prevent damage from rough handling, installation, reduction of mechanical and thermal stress.

It can prolong the life of the product during its operation and at the same time, it can help to increase the dielectric strength between conductors enabling the design of the PCB to be more compact and small.

Finally, it also acts to protect circuitry and components from abrasion and solvents.


Want to know more?

For help on conformal coatings then talk to SCH directly.

We can help with all coating requirements and offer free advice to help you.

Contact us now

Check out our website at http://www.conformalcoating.co.uk or call us on +44 (0) 1226 249019, email your requirements on sales@schservices.com, contact our distributors direct or complete the details in the contact form.

What is a fluoropolymer coating?

surface-tension-fluoroploymer-coating-500A fluoropolymer coating is comprised of fluorocarbons and characterized by carbon-fluorine bonds.

The coating is chemically inert as fluorocarbons are not susceptible to Van der Waals force. This means their characteristics  are being non-stick, friction reducing and hydrophobic.

They are also very chemically resistant demonstrating a high level of durability to acids, bases and most solvents. This is due to the fluorine bonds.

Why select a nano conformal coating like a fluoropolymer?

The nano coatings do a different job to the traditional liquid conformal coatings.

What they do is effectively change the surface energy of the substrate they are applied to.

This change in surface energy makes it harder for liquids like water and oils to wet the surface and cause corrosion etc.


Want to know more?

For help on nano coatings and fluoropolymers then talk to SCH directly. We can help with all your requirements and offer free advice on these new materials.

Contact us now

Check out our website at http://www.conformalcoating.co.uk or call us on +44 (0) 1226 249019, email your requirements on sales@schservices.com, contact our distributors direct or complete the details in the contact form.

Why use Parylene conformal coating?

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The Parylene conformal coating process is a specialised vapour deposition application process using specialist systems differing significantly to all of the other liquid conformal coatings available on the market.

This difference leads to many unique advantages:

  • Parylene coatings are completely conformal to the surface of the Printed Circuit Board (PCB) or product. This means that the coating has a uniform thickness and is pinhole free. As a result, component configurations with sharp edges, points, flat surfaces, crevices or exposed internal surfaces are coated uniformly without voids.
  • Parylene coating provides an excellent barrier that exhibits a very low permeability to moisture and gases. This means that products coating in parylene generally are more “waterproof” than the same products coated in a liquid conformal coating.
  • Parylene is unaffected by solvents, has low bulk permeability and is hydrophobic. Coatings easily pass a 100hr salt-spray test.
  • Parylene has excellent electrical properties. These include low dielectric constant and loss with good high-frequency properties, good dielectric strength, and high bulk and surface resistance
  • Parylene is transparent and can be used to coat optical elements.No initiators or catalysts are involved in the polymerization so the coating is very pure and free from trace ionic impurities.
  • Parylene is unique in being created directly on the surface at room temperature. Room temperature formation means the conformal coating and the parts are effectively stress-free.
  • Parylene coating completely penetrates spaces as narrow 0.01mm (10 microns)
  • Parylene is chemically and biologically inert and stable and make excellent barrier material.
  • Parylene has good thermal endurance: Parylene C performs in air without significant loss of physical properties for 10 years at 80°C and in the absence of oxygen to temperatures in excess of 200°C.
  • FDA approval of parylene-coated devices is well-documented. The coatings comply with USP Class VI Plastics requirements and are MIL-I-46058C / IPC-CC-830B listed.

Want to know more?

Contact us

Check out our website at http://www.conformalcoating.co.uk or

Call us on +44 (0) 1226 249019, email your requirements on sales@schservices.com, contact our distributors direct or complete the details in the contact form.

What would happen if I don’t mask a component or my circuit board correctly and apply conformal coating?

conformal coating masking tape and latex used to protect the circuit boardThe simple answer is the conformal coating is likely to go where you don’t want it to.

This will lead to the obvious step of either repairing the leak, stripping the conformal coating off the circuit board, removing a component to replace it or scrapping the board.

Therefore, the best option is to learn to mask printed circuit boards correctly.

For help on this talk to SCH directly. We can help with all your masking requirements and offer free advice on how to mask.


Want to know more?

Contact us now

Check out our website at http://www.conformalcoating.co.uk or call us on +44 (0) 1226 249019, email your requirements on sales@schservices.com, contact our distributors direct or complete the details in the contact form.

Are SCH Technologies conformal coating masking tapes and dots ESD safe?

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Our masking tapes and dots are not made of ESD material so they are not ESD safe.

The problem is that conductive material does not make good masking tape for conformal coating. There are issues with properties like adhesion and flexibility.

However, you can overcome the static generated by the products by using ESD ionising blowers and fans around the area.

Combining this with your standard ESD protection like mats, wrist straps etc should make the process completely safe.

Need to know more?

Contact us

Call us on +44 (0) 1226 249019, email your requirements on sales@schservices.com, contact our distributors direct or complete the details in the contact form.

Five Reasons To Use A Conformal Coating Spray Booth To Apply Coating to circuits

spray gun in operationConformal coating batch spraying is one of the most widely used processes in low and medium volume production. Using the right equipment like a conformal coating spray booth is very important.

This is because:

  1. The spray booth is a low cost investment compared to most application methods
  2. The spray booth is relativley quick to set up and use
  3. The spraying process is very flexible, allowing easy processing of small batches with different conformal coatings
  4. The spray process gives the best finish of coating. It produce the perfect finish and causes less issues of thin tip coverage compared to other methods.
  5. The conformal coating spray booth is designed for coating application. It has built in features like a UV light which help the operator apply the best coating.

Contact SCH Technologies now to discuss how we can help with our conformal coating spray booths that are used in our coating services.

SCH Technologies: Materials, Equipment, Services, Training and Consultancy. Conformal Coating Solutions made easy…

Contact Us Now:

  • Tel: +44 1226 249109,
  • Contact our distributors
  • Email us : Sales@scshervices.com
  • Use our website: conformalcoating.co.uk

Why Inspecting Conformal Coatings Under UV Magnification Helps

UV Inspection lamp reduced sizeConformal coating inspection is one of the most critical aspects of the process. A good inspection process ensures the coated circuit is correctly coated or finds the faults in the process.

However, inspection is not an easy process. Operators can become tired and suffer from eye strain from constantly staring at coated boards under UV light.

OLYMPUS DIGITAL CAMERA

One way to minimise this fatigue is to inspect under a UV lamp that also provides a small amount of magnification.

When this is in the range of 1.5x to 2x it can make all the difference to the operator and give more reproducible results.

Contact SCH Technologies now to discuss how we can help with our NEW UV Inspection lamp specifically used for conformal coating inspection and used in our coating services.

SCH Technologies: Materials, Equipment, Services, Training and Consultancy. Conformal Coating Solutions made easy…

Contact Us Now:

  • Tel: +44 1226 249109,
  • Contact our distributors
  • Email us : Sales@scshervices.com
  • Use our website: conformalcoating.co.uk