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What are the different methods available for cleaning electronic circuit boards?

The topic of cleaning printed circuit board assemblies (PCBAs) effectively before application of conformal coating can be daunting. This is because the process of cleaning circuit boards can be difficult especially with so many variables to consider.

When considering cleaning the circuit you need to assess many factors including:

The board and component compatibility with the cleaning method
The ability of the cleaning method to remove the contamination effectively from the circuit
Any residues the cleaning process may leave behind that may be harmful to the circuit in the long term.
The reasons for cleaning the circuit (e.g. contamination removal, adhesion promotion etc.)?
After considering these factors you can compare with the processes available.


The main methods of cleaning printed circuit boards

The main methods of cleaning used in everyday electronics processing before conformal coating application can include:

  • Aqueous washing
  • Semi-aqueous washing
  • Solvent & chemical washing
  • Plasma surface cleaning

These processes can be mixed, the method can be varied but the fundamental concepts still apply.

However, whatever method you choose you still have to consider that the key to success in cleaning circuit boards is similar to the success made with conformal coating.

You need to match the cleaning process, the cleaning materials and the circuit board together.

If you do this then this will give you the best results for cleaning the circuit board assembly.


Want to find out more about cleaning?

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

Or, read more on cleaning circuit boards on our website now.

Contact us now.

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Conformal Coating Outsourcing: What are the “Range of services” you should expect when you subcontract your coating work?

Conformal Coated PCBA conformal coating subcontract service should be able to provide:

  • Many methods of conformal coating application techniques so that the best option is chosen for your circuit board. This includes selective robotic spraying, dip coating and batch spray.
  • Be able to apply many different conformal coating materials including both liquid and parylene conformal coatings so the correct coating is chosen for the project
  • a high level of process control through an ISO 9000 system that provides full control of the conformal coating process.

To understand this more then click conformal coating range of services now.

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

Want to reduce your outsourcing costs of your conformal coating process or check just what it will cost to subcontract?

Conformal Coating PCB inspected in IB101 Inspection Booth 2Conformal Coating Services FREE TRIAL

We guarantee to offer the lowest price solutions on a like for like basis for our subcontract coating services through our North America, Europe and Asia facilities.

How can we say guarantee this?

  • We are experts in what we do! that means you get the best prices
  • We provide conformal coating services at source to the customer where we can
  • This means we benefit from lower costs in our facilities which we can pass on as savings
  • We have the full range of conformal coating processes and materials to offer so the customer gets the right application method and not a process which is isn’t fit for purpose.

This helps SCH provide the lowest cost solution without compromise to the customer.

FREE TRIAL

Let us prove to you we can coat your printed circuit boards and save you money.

Click here for your FREE TRIAL of Conformal Coating Services

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Conformal Coating Parylene Services

Why Use Parylene?

Parylene Equipment

Parylene Removal

Global Subcontract Conformal Coating Services

SCH Technologies provide Global subcontract liquid Conformal Coating and Parylene Coating Service Solutions across North America, Europe and Asia.

We are the number one complete conformal coating solution supplier within these markets. Our aim is provide the same level of conformal coating service for application of all types of coatings wherever the customer is in the world without compromise.

This allows our group to work with customers to offer the best level of service when qualifying or coating products without concern about where the printed circuit boards (PCBs) may eventually finish up being manufactured.

In short

  • We are conformal coating solution providers in North America, Europe and Asia.
  • We apply Parylene, Conformal Coating and RFI Shielding Paints using all manner of the standard methods
  • We aim to provide the same level of service wherever we process your circuit boards in the world

Check out our conformal coating and parylene service pages here.

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

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

 

How do you apply parylene to a printed circuit board?

Parylene is applied through a specialised vapour deposition process at ambient temperature. Parylene polymer deposition occurs at a molecular level, where the coating literally grows one molecule at a time on the substrate surface, assuring entirely conformal and uniform layers of parylene conformal coating are applied.

The process begins with the raw, granular material called the dimer which is heated under vacuum. The dimer is then reduced to a gaseous state in the vaporising chamber. The vapour is next drawn into the furnace and heated to very high temperatures (pyrolised) to allow for sublimation and the splitting of the molecule to a monomer. The gas is finally drawn into the room temperature deposition chamber, where the monomer gas deposits on all surfaces as a thin, transparent polymer film and the result is a parylene conformal coating uniformly deposited on the product.

Because the Parylene is applied as a gas, the conformal coating easily penetrates everywhere on components, providing complete and uniform coverage. Literally a conformal coating. . While Parylene coatings can range in thickness from hundreds of angstroms to several mils, a typical thickness is in the microns range.

If you would like to know more about parylene and coating services or other products offered and supported by SCH Technologies, please do not hesitate to contact us

Telephone: +44 1226 249019

Email: sales@schservices.com

Click Contact Us to send us your requests.

I want to transfer my conformal coated PCBs to Asia but need a reliable coating service. What can I do?

SCH Technologies is part of the Diamond Coating Solutions Group operating across North America, Europe and Asia.

The Diamond Group’s aim is to provide the same level of conformal coating outsourcing service for application of coatings wherever the customer is in the world without compromise. This allows SCH to work with customers to offer the best level of service when qualifying or coating products without concern about where the printed circuit boards (PCBs) may eventually finish up being manufactured.

Our facilities are based strategically across North America, United Kingdom and China with further facilities opening shortly. All sites offer full coating services including Parylene, liquid conformal coatings, EFI / EMI shielding lacquers.

For further information on subcontracting your coating work overseas click Global Conformal Coating Services or other products and services offered and supported by SCH Technologies, please do not hesitate to contact us

Telephone: +44 1226 249019

Email: sales@schservices.com

Click Contact Us to send us your requests.