Ever wondered what a conformal coating is actually made of?

Conformal coating is a kind specialized paint or varnish that is made of volatile and non-volatile components.

A Background on Paint and Varnish

The ISO 4618: 2014 defines paint and varnish as a liquid, paste-like or powder product which, when applied to a circuit board or other substrate, results in a coating.

Hence, conformal coating is a specialized material that belongs to the paint and varnish family

Composition of Conformal Coating

A conformal coating is comprised of two main elements namely the volatile and non-volatile components.

1. Volatile elements – composed of solvents, water, and additives

2. Non-volatile elements – composed of binder and colourants

It’s important to note that every conformal coating has a unique set of physical and electronic properties.

This allows for flexibility when choosing the most appropriate conformal coating.

Read more at What is a conformal coating made of?

Who is Nexus?

Nexus brings together the accumulated knowledge of a group of conformal coating and electronics material dispensing consultants who provide a unique service, focused on helping electronics manufacturing clients improve their conformal coating and electronics materials processes.

Nexus operate across North America, Europe and Asia and can provide a unique perspective to the rapidly growing conformal coating and electronics materials industry. Expertise is held in liquid and parylene coating, capital equipment sales and specifications and material, equipment and process specification, troubleshooting and training.

 

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What are the different classifications of conformal coatings?

The family tree of common conformal coatings normally found include organic and inorganic liquid coatings and Parylene.

The evolution of the conformal coating over the last 50 years has led to a large range of conformal coatings with many different variations.

The family tree below shows the common materials normally found including organic and inorganic liquid coatings and Parylene.

family of coatings

The coatings can be further sub divided:

  • Liquid and Vapour Deposition Groups
  • Liquid Conformal Coatings Families
  • Liquid Conformal Coating Resin Types
  • Drying and Curing Subdivision
  • One / Two-Part Coating
  • Solvent / Solvent Free
  • Physical and electrical properties

To find out more click Classification of Conformal Coatings: An Introduction

Who is Nexus?

Nexus brings together the accumulated knowledge of a group of conformal coating and electronics material dispensing consultants who provide a unique service, focussed on helping electronics manufacturing clients improve their conformal coating and electronics materials processes.

Nexus operate across North America, Europe and Asia and can provide a unique perspective to the rapidly growing conformal coating and electronics materials industry. Expertise is held in liquid and parylene coating, capital equipment sales and specifications and material, equipment and process specification, troubleshooting and training.

Find out more at Nexus3C: Conformal Coating Centre

What Does a Conformal Coating Actually Do?

2015-10-08 13.30.37 reduced and croppedA conformal coating can actually help in many ways by creating a barrier against attack during the lifetime of the circuit board.
This includes:

  • Creating a high degree of insulation protection across the circuit board.
  • Prevents contamination on the surface
  • Increase Dielectric Strength between components
  • Strengthen the board in the field

To find out more click Nexus Ebook: What is a Conformal Coating?

Useful Links

Ebook Overview

Why use a conformal coating to protect a circuit board?

What is a Conformal Coating?

Nexus Conformal Coating 101: The Basic Understanding

Nexus are launching a new section this month to look at the fundamental issues of conformal coating such as why coat and what does the coating do to protect the circuit board?

For example Nexus examines how the conformal coating protects the assembly from corrosion in harsh environments such as moisture, dust, chemicals, and temperature extremes that, if un-coated (non-protected), could result in damage or failure of the electronics to function.

It can also improves reliability in humid environments, reduce the need to hermetically seal the PCB, reduce conductor spacing’s on a PCB and protect the PCB in aggressive environment and keep it free from environmental particulates.

Click NEW Conformal Coating 101 for further information.