Tag Archive | parylene

Five key facts about Parylene when protecting printed circuit board assemblies

  1. The Parylene conformal coating process is a very specialised vapour deposition application method using specialist vacuum chamber systems. This differs significantly to all of the other liquid conformal coatings available on the market that are applied by spraying, brushing and dipping.
  2. Parylene coating is completely conformal and uniform to the surface of the Printed Circuit Board (PCB) or product. It is also pinhole free. Therefore, components with sharp edges, points, flat surfaces, crevices or exposed internal surfaces are coated uniformly without voids.
  3. Parylene coating provides an excellent moisture and gas barrier due its very low permeability. This means that electronics circuit boards coated in Parylene generally are more “waterproof” than the same electronics coated in a liquid conformal coating.
  4. Parylene is unaffected by solvents (it has very high chemical resistance) and is very effective against salt attack.
  5. Parylene has excellent electrical properties. This includes having low dielectric constant and loss with good high-frequency properties, good dielectric strength, and high bulk and surface resistance.

Want to find out more about Parylene?

Contact us to discuss your needs and let us explain how we can help you.

Or, read more on Parylene equipment and our Parylene subcontract services now.

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Why use Parylene conformal coating?

parylene-system-in-operation-400

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.

10 Reasons To Use Parylene Coating for Circuit Board Protection

  1. True Conformal Coating. Parylene coating is completely conformal to the surface of the Circuit Board. This means that the coating has a uniform thickness and is pinhole free.
  2. Very Low Permeability. 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.
  3. Solvent Protection. Parylene is unaffected by solvents, has low bulk permeability and is hydrophobic.
  4. Salt Protection. Coatings easily pass a 100hr salt-spray test due to the homogeneous coating.
  5. 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.
  6. 100% Clarity. Parylene is transparent and can be used to coat optical elements.
  7. Room Temperature Deposition. 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.
  8. Inert in nature. Parylene is chemically and biologically inert and stable and make excellent barrier material.
  9. Excellent Penetration. Parylene coating completely penetrates spaces as narrow 0.01mm (10 microns)
  10. Good Thermal Properties. 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.

To find out more click Parylene Application Process

SCH provide Parylene Machines from Paratronix. SCH also offer Conformal Coating Materials, Equipment, Services, Training and Consultancy.

SCH Technologies: 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 is Parylene used for waterproofing circuit boards?

Parylene is a completely homogeneous coating. That means it is the same thickness all over the circuit.

This is achieved by the coating being applied as a vapour and the coating condensing onto the circuit board uniformly.

This uniformity of coating means that the water cannot easily come into contact with the circuit and cause shorts.

To find out more click Parylene Application Process

SCH provide Parylene Machines from Paratronix. SCH also offer Conformal Coating Materials, Equipment, Services, Training and Consultancy.

SCH Technologies: 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

What information do I need to provide to get a conformal coating quotation for subcontract service?

When deciding to look at outsourcing your conformal coating process there are fundamental questions you need to answer and information to be provided to allow us to provide an accurate quote.

Questions to be answered include:

  1. Do you require the circuit boards to be cleaned or is this a no clean process?
  2. What are your expected volumes of PCBs to be processed?
  3. What turnaround time do you require on the service?
  4. What conformal coating material do you want applied?
  5. Do you have photos and /or masking drawings of the PCBs?
  6. How big are the PCBs for costing purposes?
  7. Do you have a particular coating process you prefer to be used?
  8. Do you have any masking requirements before coating application?
  9. What conformal coating standards do you require the PCBs to be inspected to?
  10. Are there any materials on the PCB such as silicone RTV that can cause problems when processing?
  11. Are there any special requirements?

These are the basic questions and each of them will lead to further questions. As with many projects, many answers are unknown and SCH can help develop the conformal coating process with you.

Take a look at our conformal coating services introduction to understand what we can offer you.

Or, contact us here at +44 1226 249019 or email sales@schservices.com

 

Ten Reasons to use Parylene Conformal Coatings on your Circuit Boards

  1. Parylene coatings are completely conformal to the surface of the PCB. This means that they have a uniform thickness and are pinhole free. As a result, component configurations with sharp edges, points, flat surfaces, crevices or exposed internal surfaces are coated uniformly without voids. This provides the best protection possible, can make the circuit board “waterproof” and is impossible to achieve with liquid conformal coatings.
  2. Parylene coatings are chemically and biologically inert and stable and make excellent barrier materials.
  3. Parylene conformal coating has excellent electrical properties: low dielectric constant and loss with good high-frequency properties; good dielectric strength; and high bulk and surface resistance.
  4. Parylene is completely transparent and can be used to coat optical elements like LEDs without changing the properties of the device.
  5. Parylene complies with USP Class VI Plastics requirements
  6. Parylene conformal coating is both MIL-I- 46058C and IPC-CC-830B listed.
  7. Parylene has achieved FDA approval of when used on devices and is well-documented.
  8. 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
  9. Parylene coating completely penetrates spaces as narrow 0.01mm (10 microns)giving you a complete coverage of a circuit board.
  10. 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.

For further information on Parylene Coatings click

Or, contact us here at +44 1226 249019 or email sales@schservices.com

NEW Parylene Machines available from SCH Technologies

Parylene Coating System in Production Environment

Parylene Coating System in Production Environment

SCH now has a contract to distribute Parylene Coating Machines along with a full range of parylene dimers including parylene C and N in Europe to suit small, medium or large volume end users.

This partnership allows SCH to offer the full solution to customers whether they want liquid or parylene conformal coating and may require either coating services or equipment and materials. What is also unique from a customer perspective is that we also offer full training, installation and continuous support for your parylene process throughout the lifetime of the machine as you would require in tackling your issues. We don’t just sell you the machine and walk away. We are a partnership there to help.

For further information click parylene coating systems to read further information on the new systems or contact us directly to discuss your needs.