IPC - Institute for Interconnecting and Packaging Electronic Circuits
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| IPC-CC-830B |
| Qualification and Performance of Electrical Insulating Compound for Printed Wiring Assemblies |
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IPC - CC-830B - 08/01/2002 - Qualification and Performance of Electrical Insulating Compound for Printed Wiring Assemblies
Scope
This standard establishes qualification and conformance requirements for electrical insulating compounds (conformal coatings). It has been designed and constructed with the intent of obtaining maximum confidence in the materials with minimum test redundancy. This standard covers:
- The qualification and qualification retention of the conformal coating material (Table 3-1, Column A and B).
- The quality conformance of conformal coating material properties (Table 3-1, Column C).
For the purpose of this standard, the term conformal coating is used herein when referring to a type of protective coating for use on printed wiring assemblies. The conformal coating is intended to provide protection from moisture and contamination and provide electrical insulation; not as a sole source of mechanical support.
For the purpose of this standard, inspections are performed on standardized test vehicles instead of real production assemblies. A standardized test vehicle refers to the test vehicle specified per test method indicated, coated with the conformal coating under inspection.
Purpose
With standardized testing on standardized test vehicles under test conditions specified in test methods listed herein, this standard enables a manufacturer to qualify his conformal coating product and express the qualification it possesses. This standard also enables the manufacturer to attest the conformance of the quality of production to the qualification of each product.
Classification
Types Conformal coatings shall be categorized into types by the cured chemistry of the coating. The type for multifunctional materials shall be based on the chemistry type which is the highest percentage by weight. Conformal coatings shall be of the following types:
- Type AR- Acrylic
- Type ER - Epoxy
- Type SR - Silicone
- Type UR- Polyurethane
- Type XY- Paraxylylene