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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