Three key reasons to use a Molecular Vapor Deposition (MVD) process to protect a circuit board instead of conformal coatings

Blog, Molecular vapour deposition

Molecular Vapour Deposition (MVD) is a new process introduced to the electronics coating market.

MVD is a hybrid coating technique using ALD (Atomic Layer Deposition) and CVD (Chemical Vapor Deposition) coating processes in combination.

The method uses multiple layers of ultra-thin coatings with differing properties to build a completely protective coating with a final hydrophobic Nano coating as a top layer.

MVD

Here are three key points that strongly suggest you should find out more about this coating:

  1. The physical and electric performance of the MVD coating is superior to other materials like conformal coatings and Parylene. Parameters such as Water Vapor Transmission Rate (WVTR), hydrophobicity, coating adhesion, dielectric strength and temperature performance (>250°C) are vastly improved when protecting circuit boards.
  2. The MVD coating does not require masking to protect sensitive components and electric connectivity in connectors is easily made even when coated. This is because the coating thickness of the MVD material is x10 less than that of Parylene.
  3. The cost of process is much lower than all other protective materials due to the fact that raw ingredients are low cost and no masking is required.

There are many other performance criteria that make this material a really interesting process that could change perceptions.

For further reading try the Nexus Blog articles

See how this coating could improve the performance of your circuits now.

Want to find out more about Molecular Vapor Deposition?

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

Find out how we can help you with your conformal coating process now.

Contact us now.

How do I correctly dip coat my circuit board in conformal coating?

Blog, conformal coating

Dip coating is a traditional conformal coating application method that has been used to conformal coat circuit boards for a very long time.

The process in its simplest form is as follows:

  • The printed circuit board (PCB) is dipped into a tank of conformal coating liquid.
  • This can be complete submersion or partial dip.
  • The board can be dipped vertically, horizontally or at another angle.
  • The board can be dipped manually or automatically.
  • The board is removed from the coating and the excess coating drains away.

This process is highly effective in applying a conformal coating to a printed circuit board (PCB).

What equipment may you need for dipping circuit boards in conformal coating?

A simple process is a board dipped by hand into a container of conformal coating. This can give some reasonable results.

However, normally dip coating equipment is used. This is especially true if medium and high volume processing is required.

The reason for using dipping machines is because the process has variables that are critical to film integrity and they are controlled by the machine system.

The variables that are critical for film quality and thickness are:

  • The speed of immersion
  • Dwell time in the coating
  • The withdrawal speed of the board

These factors, plus the viscosity of the conformal coating, are important to create a high quality finish and reduce costs.

A simple process is a board dipped by hand into a container of conformal coating. This can give some reasonable results. However, normally dip coating equipment is used. This is especially true if medium and high volume processing is required.
A simple process is a board dipped by hand into a container of conformal coating. This can give some reasonable results. However, normally dip coating equipment is used. This is especially true if medium and high volume processing is required.

 

How cost effective is the dip process for conformal coating?

The conformal coating process itself can be extremely low cost.

The cost of a dip system can be low compared to many other processes and when balanced against the speed of application.

However, if the circuit board demands a lot of components be masked before processing then the overall coating process can be expensive.

Masking for dipping can be very demanding and very difficult to complete successfully.

Need to know more about using a conformal coating in your application process?

Contact us now and we can discuss how we can help you.

Give us a call at (+44) 1226 249019 or email your inquiries at sales@schservices.com

 

0
    0
    Your Cart
    Your cart is empty
    Continue Shopping
      Calculate Shipping