Tag Archive | conformal coating materials

I have been asked to apply a really thick layer of conformal coating to my printed circuit board. What are the problems with this approach?

Applying conformal coating really thick is not a good idea especially if you exceed the recommended thickness from the manufacture.

There are several reasons for this but the two key ones are:

  1. Applying a thick coating can cause long-term reliability issues. This is because the conformal coating can crack and craze in the long-term. It can also possibly cause damage to the PCB due to Coefficient of Thermal Expansion (CTE) mismatch between components and the coating.
  2. Defects like bubbles can occur when applying really thick conformal coating layers.

If in doubt, more is not better. Conformal coatings are not designed as encapsulates and potting compounds. The IPC and mil spec recommend certain thicknesses such as 30-150um for acrylics. It’s a good idea to keep within these tolerances and use conformal coating thickness measurement systems to check.

For further information on Coating Thickness application issues or other areas please contact us here at +44 1226 249019 or email sales@schservices.com


 

Need a Conformal Coating Expert on the team but don’t need them full time?

Want to have instant access to questions like this by talking with our team?

Then sign up for our great value Conformal Coating Support Contracts.

Contact us NOW at  +44 1226 249019 or email sales@schservices.com

 

Are the Conformal Coating Masking Boots ESD safe?

Completely masked PCB ready for conformal coating 3 close upThe short answer is no for our standard boots!  The good news is we can make the same boots in ESD safe material for you.

Click conformal coating masking boots FAQs for further questions or conformal coating masking boots for general information.

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


Conformal Coating Masking Boots FREE TRIAL

SCH has worked hard to develop conformal coating masking boots at an affordable price.We now find that

  • We can reduce the costs of the conformal coating masking process by as much as 80%
  • Reduce the number of errors in processing by making the masking job much easier and reducing problems like leaking tape I thing of the past
  • Reduce the time for masking and de-masking by as much as 80% by simplifying the process

Don’t believe us?

We are happy to provide a free trial of our masking boots so you can test it for yourself. We can then work out your Return on Investment. All we ask is you pay for the carriage of the parts and we will refund this cost against an order if successful.

Click Conformal Coating Masking Boots FREE TRIAL and try the boots today.


 

Can I horizontally dip my printed circuit board in conformal coating and achieve a good finish?

Dipping PCBs in conformal coating

Dipping PCBs in conformal coating

The answer is yes.

In fact we can dip your PCBs at any angle you choose. The key is control of the dipping depth and being able to hold the PCB. If we can achieve both successfully then it is perfectly possible to horizontally dip PCBs using automated batch dip coating machines such as the DS101 dip system.

There are many factors to consider such as the size of the board, the depth of dipping allowed, the type of conformal coating to be used, how to hold the PCB and the masking & components on the board that must be considered.

However, SCH regularly use this technique to minimise costs for customers. We can develop the fixtures to support the PCBs as well as design for multiple dipping of the boards.

Click conformal coating dip system FAQs for further questions

Try our different conformal coating dip system pages to see if they meet your needs:

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

I would like to order some conformal coating masking boots. What do I do?

Conformal Coating Masking Boots on a circuit board before coating

Conformal Coating Masking Boots on a circuit board before coating

There are two realistic options for getting accurate quotes and designs made for custom boots.

These are:

  1. Supply a sample of the PCB along with a masking diagram so that we know what needs masking.
  2. Supply photos of the PCB along with exact dimensions of the components or the component codes .  You can get this from the component supplier.

With this information we will then check against stock and quote you a price. Please remember we want to get this right so we cannot guess. We will make the boots to a very high tolerance and need to get the measurements correct.

Click conformal coating masking boots FAQs for further questions or conformal coating masking boots for general information.

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


Conformal Coating Masking Boots FREE TRIAL

SCH has worked hard to develop conformal coating masking boots at an affordable price.We now find that

  • We can reduce the costs of the conformal coating masking process by as much as 80%
  • Reduce the number of errors in processing by making the masking job much easier and reducing problems like leaking tape I thing of the past
  • Reduce the time for masking and de-masking by as much as 80% by simplifying the process

Don’t believe us?

We are happy to provide a free trial of our masking boots so you can test it for yourself. We can then work out your Return on Investment. All we ask is you pay for the carriage of the parts and we will refund this cost against an order if successful.

Click Conformal Coating Masking Boots FREE TRIAL and try the boots today.


 

Dont know where to start in Conformal Coating? then start here….

Conformal Coating PCB inspected in IB101 Inspection Booth 2Conformal coating processing can be tricky and confusing. It can also take a lot of time to process. We know as our website has over 500 pages of information to digest!

So, we have created a start-up page that allows people who don’t quite know where to go first the chance to review a few points and then find the right information quickly. After all, navigating through a complex topic like conformal coating can be daunting.

Don’t let it be!

Click Start Here for Conformal coating and make life easier.

 

Want help in Selecting a Conformal Coating Material. Then use our New Technical Bulletin

Conformal coating Material SelectionChoosing the right conformal coating material for your process can be difficult. You need to consider several factors which if you are lucky will all add up to at least one material choice. If not, then compromises are required.

Factors to be considered are:

  • Temperature Operating Range
  • International, Customer or National Standards
  • Environmental Considerations
  • Chemical Resistance
  • Requirement to Rework the Conformal Coating
  • Application Process Considerations
  • Curing the conformal coating
  • National, State, Regional Legislation and Insurance
  • Supplier Performance
  • Price

Each of these factors is examined briefly in our new Technical Bulletin How Select a Conformal Coating Material. It is written to allow an insight into the complexity of selecting a conformal coating material and gives you everything you need to ask to ensure you get it right.

Click Technical Bulletin How Select a Conformal Coating Material to download the PDF to understand what we can offer you.

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