IPC-CC-830B.pdf - 第8页
Appendix A Example of Qualification Inspection Report ........................................................ 9 Appendix B Example of Qualification Retention Inspection Report .................................. 10 Appendi…
Table of Contents
1 SCOPE ....................................................................... 1
1.1 Scope ...................................................................... 1
1.2 Purpose ................................................................... 1
1.3
Classification ......................................................... 1
1.3.1
Types....................................................................... 1
1.3.2
Classes.................................................................... 1
1.4
Interpretation .......................................................... 1
2 APPLICABLE DOCUMENTS ..................................... 1
2.1
IPC ......................................................................... 1
2.2
Government ........................................................... 2
2.3
American Society for Testing of Materials .......... 2
2.4
Underwriters Laboratories .................................... 2
2.5
ANSI ...................................................................... 2
2.6
ISO ........................................................................ 2
3 REQUIREMENTS ....................................................... 2
3.1
General Requirements ........................................... 2
3.1.1
Terms and Definitions............................................ 2
3.1.2
Conflict ................................................................... 2
3.2
Inspection and Testing Requirements.................... 2
3.2.1
Qualification Inspection and Testing..................... 2
3.2.2 Qualification Retention Inspection
and Testing ............................................................. 2
3.2.3
Quality Conformance Inspection Testing.............. 2
3.2.4
Additional Testing.................................................. 3
3.3
Materials Requirements ........................................ 3
3.3.1
Materials................................................................. 3
3.3.2
Shelf Life................................................................ 3
3.3.3
Cure ........................................................................ 3
3.4
Chemical Requirements ........................................ 3
3.4.1 Fourier Transform Infrared Spectroscopy
Test (FTIR)............................................................. 3
3.5
Physical Requirements .......................................... 4
3.5.1
Viscosity ................................................................. 4
3.5.2
Appearance............................................................. 4
3.5.3
Fluorescence........................................................... 4
3.5.4
Fungus Resistance.................................................. 4
3.5.5
Flexibility................................................................ 4
3.5.6
Flammability........................................................... 4
3.6
Electrical Requirements ........................................ 4
3.6.1
Dielectric Withstanding Voltage (DWV)............... 4
3.7
Environmental Requirements ................................ 4
3.7.1
Moisture and Insulation Resistance....................... 4
3.7.2 Thermal Shock ....................................................... 4
3.7.3 Temperature and Humidity Aging (Hydrolytic
Stability) ................................................................. 4
4 QUALITY ASSURANCE PROVISION ....................... 5
4.1 Responsibility for Inspection................................. 5
4.2 Categories of Inspection ....................................... 5
4.2.1 Qualification Inspection ......................................... 5
4.2.2 Qualification Retention Inspection ........................ 5
4.2.3 Quality Conformance Inspection........................... 5
4.3 Frequency of Inspection ....................................... 5
4.3.1 Qualification Inspection ......................................... 5
4.3.2 Qualification Retention Inspection ........................ 5
4.3.3 Quality Conformance Inspection........................... 5
4.4 Product Change...................................................... 5
4.5 Test Equipment and Inspection Facilities.............. 5
4.5.1 Standard Laboratory Conditions............................ 5
4.5.2 Permissible Temperature Variation in
Environmental Chambers....................................... 6
4.5.3 Reference Conditions............................................. 6
4.6 Inspection Routine.................................................. 6
4.7 Inspection Sampling .............................................. 6
4.7.1 Test Vehicles ......................................................... 6
4.7.2 Sample Size............................................................ 6
4.7.3 Preparation Prior to Coating.................................. 6
4.7.4 Coating.................................................................... 7
4.8 Failures ................................................................... 7
4.9 Inspection Reporting ............................................. 7
4.9.1 Qualification Reporting.......................................... 7
4.9.2 Qualification Retention Reporting......................... 7
4.9.3 Quality Conformance Reporting............................ 7
5 PREPARATION FOR DELIVERY .............................. 7
5.1 Containers............................................................... 7
5.2 Packaging................................................................ 8
5.3 Marking .................................................................. 8
6 NOTES ........................................................................ 8
6.1 Order Data.............................................................. 8
6.2 Formulation Change............................................... 8
6.3
Conditioning........................................................... 8
6.4
Cleanliness.............................................................. 8
6.5
Adhesion................................................................. 8
6.6
Solvent Compatibility ............................................ 8
6.7 Identification of Solvent Sensitive Conformal
Coatings.................................................................. 8
August 2002 IPC-CC-830B
v
Copyright Association Connecting Electronics Industries
Provided by IHS under license with IPC
Not for Resale
No reproduction or networking permitted without license from IHS
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Appendix A Example of Qualification Inspection
Report
........................................................ 9
Appendix B Example of Qualification Retention
Inspection Report
.................................. 10
Appendix C Example of Quality Conformance
Inspection Report
.................................. 11
Figures
Figure 4-1 IPC-B-25A.......................................................... 7
Figure 4-2 Test Coupon with ‘‘Y’’ Shape Pattern................ 7
Tables
Table 3-1 Requirements for Qualification, Qualification
Retention and Quality Conformance of
Conformal Coating Products................................ 3
Table 4-1 Test Vehicles and Sample Sizes.......................... 6
Table 4-2 Thickness Requirements on Test Vehicle ........... 7
IPC-CC-830B August 2002
vi
Copyright Association Connecting Electronics Industries
Provided by IHS under license with IPC
Not for Resale
No reproduction or networking permitted without license from IHS
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Qualification and Performance of Electrical Insulating
Compound for Printed Wiring Assemblies
1 SCOPE
1.1 Scope
This standard establishes qualification and
conformance requirements for electrical insulating com-
pounds (conformal coatings). It has been designed and con-
structed with the intent of obtaining maximum confidence
in the materials with minimum test redundancy. This stan-
dard covers:
• The qualification and qualification retention of the confor-
mal 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 coat-
ing is used herein when referring to a type of protective
coating for use on printed wiring assemblies. The confor-
mal 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.
1.2 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.
1.3 Classification
1.3.1 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 chemis-
try 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
1.3.2 Classes This standard allows a manufacturer to
classify his qualified products according to functional capa-
bilities. Inspection and testing requirements are different
for each class. Classification attained shall be reported in
the qualification inspection report. An example of the
report format is shown in Appendix A.
Conformal coatings shall be of the following classes:
Class A — Non-hydrolytically stable conformal coating.
Temperature and humidity aging test is not required for this
class of product. Lower moisture insulation resistance is
permitted (see 3.7.1).
Class B — Hydrolytically stable conformal coating. Tem-
perature and humidity aging test is required for this class of
product. Higher moisture insulation resistance is required
(see 3.7.1).
Note: Previous versions of this specification, and other IPC
documents, make reference to ‘‘Class 1,’’ ‘‘Class 2’’ and
‘‘Class 3.’’ Inspection and testing requirements for these
classes are not directly correlated to Class A and B.
1.4 Interpretation ‘‘Shall,’’ the imperative form of the
verb, is used throughout this standard whenever a require-
ment is intended to express a provision that is mandatory.
Deviation from a ‘‘shall’’ requirement may be considered if
sufficient data is supplied to justify the exception.
The words ‘‘should’’ and ‘‘may’’ are used whenever it is
necessary to express non-mandatory provisions. ‘‘Will’’ is
used to express a declaration of purpose.
To assist the reader, the word ‘‘shall’’ is presented in bold
characters.
2 APPLICABLE DOCUMENTS
The following documents of the issue currently in effect
form a part of this standard to the extent specified herein.
2.1 IPC
1
IPC-B-25A Multipurpose Test Board
IPC-T-50 Terms and Definitions for Interconnecting and
Packaging Electronic Circuits
IPC-TM-650 Test Methods Manual
2
2.3.42 Identification of Solder Mask Products Using
Fourier Transform Infrared Spectroscopy (FTIR)
1. www.ipc.org
2. Current and revised IPC Test Methods are available through IPC-TM-650 subscription and on the IPC Web site (www.ipc.org/html/testmethods.htm).
August 2002 IPC-CC-830B
1
Copyright Association Connecting Electronics Industries
Provided by IHS under license with IPC
Not for Resale
No reproduction or networking permitted without license from IHS
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