How do I select a conformal coating?

Dr Lee Hitchens, Author of Nexus website and ebook
Dr Lee Hitchens, Author of Nexus

I am regularly asked how I would go about choosing a conformal coating?

I normally respond to the person involved by asking an awful lot of questions and they wonder what they got themselves in to!

Why do I have to ask a lot of questions?

The questions are there because choosing a conformal coating process is a complicated process usually balancing a lot of important trade-offs and compromises.

When I consider the question I actually see three major parts of the complete process.

These parts are:

  1. The conformal coating material
  2. The application method
  3. The circuit board design

When you consider these three points you have to balance them to create the best compromise process solution that suits your requirements.

This is what I call the Holistic Approach to conformal coating.

So, what should you do next?

It is tempting to consider one of these parts in isolation.

However, this could be a mistake.

After all, the wrong choice can be devastating to the conformal coating production process as a whole and even worse, the reliability of your product.

 

I feel that to identify the best conformal coating material and application process there are several key factors that you need to consider that, if you are lucky, will add up to at least one sensible process choice.

Factors to be considered include:

  • Temperature operating range
  • International, customer or National Standards
  • Environmental considerations of the circuit board
  • Requirement to rework the conformal coating
  • Conformal coating material type
  • Application process considerations
  • Curing the conformal coating
  • National, State, Regional Legislation and Insurance
  • Supplier performance and availability
  • Price

To find out more about these factors visit Nexus and see how we recommend you select a conformal coating through the holistic approach.

 

Conformal Coating Materials and How they affect Production

Conformal Coating Bubble defectsNexus has highlighted six critical areas that affect coating production and reduce performance on the line. These are the machines, materials, staff, process control, upstream processes and customer requirements.

In a series of six articles over the next six weeks Nexus will attempt to highlight these six key areas for production and how the production line can be improved to achieve acceptable levels of defects.

This week Dr Lee Hitchens will consider the conformal coating material itself and how it affects the selective conformal coating production process.

Click here to Find out more…..

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China Nexus Workshop Topic: The Conformal Coating Process – Are you in control?

Nexus are to hold a FREE conformal coating workshop in the Diamond SCH coating facility in Shenzhen China on the 17th October 2012.

Topics include Process Control of Conformal Coating : How do you keep control of your coating line and ensure your customer stays happy? this presentation addresses many of the process issues found on a conformal coating line and shows how to control these variables using measurement systems and the appropriate methods.

Want to control your conformal coating process? Watch this presentation.

This One-day workshop will be held at the Diamond SCH Conformal Coating Facility. The address is 3rd Floor, A5 Building, Tianrui Industrial Park, Fuyuan Road1, FuYong Town, Baoan District, Shenzhen, China.

Click  Shenzhen China Conformal Coating Workshop October 2012 for further information or book your place.

Nexus Webinars: Conformal Coating Guide to Design, Application and Reliability

Nexus are to hold a series of webinars on conformal coating topics in the Autumn of 2012.The series of four online conformal coating webinars will cover the following topics and each last 90 min. The first of the online training webinars will be:

Conformal Coating Guide to Design, Application & Reliability
12th November 2012

Conformal coating may be a new process to many people and its important to have a good grounding in the fundamentals before embarking on the use of coatings. An incorrect choice at the design stage can add significant cost to the product without the desired benefits. Correct selection of components and application techniques can significantly reduce cost by reducing or eliminating masking steps. A key step during design is to assess the effective reliability prior to going into full production.

Topics will include:

Why conformal coating is necessary
Types of material and their benefits
Design engineers check list
Coating application methods
Testing product reliability

Please click online conformal coating webinars for further information.

Nexus How To Guide on the Control of Conformal Coating Viscosity available NOW

One of the most important variables in conformal coating that can cause chaos in your processes. What does viscosity affect and how can you control it in your conformal coating assembly processing?

The Nexus How To Guides are a range of Technical Bulletins that will be available weekly.

Each How To Guide will be initially launched through the FREE subscription service. The Guides will then be available for access online here below. There will also be a Printer Friendly version and a PDF version for easy download if required.

Dont miss out on your copy of the NEW How To Guides from Nexus as they are published

If already subscribed, Click Nexus How To Guide on the Control of Conformal Coating Viscosity to access.

To join Nexus for Free click Nexus Conformal Coating Resource Sign Up