Printed board quality encompasses many parameters, cleanliness being one important parameter. This document defines the recommended general requirements for the cleanliness of unpopulated (bare) single, double-sided and multilayer printed boards. Coverage is given to Ion Chromatography (IC) testing and Ionic cleanliness testing for process control.

TABLE OF CONTENTS

1 SCOPE
1.1 Statement of Scope
1.2 Post Analysis Considerations
1.3 Terms and Definitions
1.3.1 As Agreed Between User and Supplier
(AABUS)
1.4 Interpretation
2 APPLICABLE DOCUMENTS
2.1 IPC
2.2 International Organization for Standardization
2.3 Industry

3 TEST SPECIMENS

4 CLEANLINESS REQUIREMENTS
4.1 Ion Chromatography (IC) Testing
4.1.1 Analysis of Extract Solution
4.1.2 Inorganic Ions
4.1.3 Application of Solder Mask
4.1.4 Qualification by Similarity
4.2 Ionic Cleanliness Testing for Process Control

5 DOCUMENTATION
Tables
Table 4-1 Bare Printed Board Ionic Contamination
Maximum Limits (μg/cm2)
Table 4-2 Inorganic Ions