The Mil Standard (MIL-I-46058C) is a US military conformal coating standard.
It has been inactive for new designs since November 1998.
However, the standard is still widely used for independent certification of conformal coatings.
This means that an independent test house will test the conformal coating. It is not self-certified.
All companies tested to the Mil standard are listed on a Qualified Product List (QPL).
Therefore, conformal coatings listed on the QPL will have been through rigorous 3rd party testing.
MIL-I-46058C is a guideline for quality. However, other standards like IPC-CC-830 may be equally relevant.
What is the role of a qualification or standard in conformal coating?
The role of a standard and qualifications is to give a guideline for users on the quality of a product.
For conformal coating standards and qualifications there are two areas that they cover.
- Material manufacture
- Production process
The conformal coating material manufacture standards are used for making the conformal coating.
They are only really relevant to suppliers so that they can measure their coating performance against a set of tests.
The conformal coating production standards are used for qualifying a process.
They are used in the production environment.
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For conformal coating processing and inspection there are many different types of standards.
They include international, national, national trade bodies and internal company standards.
The purpose of standards is to give guidance for users on the quality of the conformal coating process.
For conformal coating standards there are two areas that they address.
- Conformal coating manufacture
- Conformal coating production process
These two areas are distinctly different.
Standards for conformal coating manufacture
These standards are used for the manufacture of the conformal coating.
- Underwriters Laboratories (UL)
- IEC 61086-1 ed2.0
These standards are used to test the quality of the conformal coating before use.
The standards can also be split in two other ways.
- Self-Certification: Those that the manufacturer follows and completes the testing themselves on their own conformal coatings.
- Independent: Those standards that are completed by independent laboratories on the customer coatings.
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Standards for the conformal coating process
The standards for processing conformal coatings are used by the end user of the coating in the production environment.
- IPC A 610 Acceptability of Electronic Assemblies
- IPC-HDBK-830 Guidelines for Design, Selection and Application of Conformal Coatings
Both standards are self-certifying and help the production team control their conformal coating processes.
If further information on these topics and the key question you can go to our free eBook by clicking conformal coating standards now.
If you are new to Nexus and our work on conformal coatings then a good place to go is our Start Here page.
Dr Lee Hitchens is the author of the Nexus conformal coating website and eBook.
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The role of the standard is to give a guideline for users on the quality of the product.
There are International, National, National Trade Bodies and internal company standards for conformal coating processing and inspection.
For Conformal Coating there are two areas that the Standards cover. These are:
- Material Qualification
- Process Control
These two types of standard are very different and it is important to use the right one for your process.
Click Conformal Coating Standards to find out more about the different standards, how they are used and how they can help you in your conformal coating production?
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