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BSI PD IEC/TS 61189-3-301:2016

BSI PD IEC/TS 61189-3-301:2016

$102.76

Test methods for electrical materials, printed boards and other interconnection structures and assemblies – Test methods for interconnection structures (printed boards). Appearance inspection method for plated surfaces on PWB

Published By Publication Date Number of Pages
BSI 2016 20
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This part of IEC 61189 outlines a way to determine the appearance non-uniformity of both the lustre and colour on plated metal surfaces in printed wiring boards (PWBs). The method is applicable to gold, nickel and copper plating in PWBs.

PDF Catalog

PDF Pages PDF Title
4 CONTENTS
5 FOREWORD
7 1 Scope
2 Normative references
3 Terms and definitions
4 Test specimens
5 Equipment / apparatus
5.1 Evaluation of lustre non-uniformity
8 5.2 Evaluation of colour non-uniformity
6 Procedure
6.1 Outline of the method
6.2 Specimen preparation
6.3 Imaging of surface roughness/chromaticity distribution
6.4 Binarization of images
Figure 1 – Flow chart of the test procedure
9 6.5 Extraction of feature quantities
6.6 Derivation of discriminant function
6.7 System registration
10 7 Report
8 Additional information
11 Annex A (informative) Example of equipment and tested result for lustre non-uniformity
A.1 Equipment for lustre non-uniformity inspection
A.2 Tested result
A.2.1 Surface roughness image
Figures
Figure A.1 – Equipment prototype
12 Figure A.2 – Images of gold-plating of non-defective and defective products
13 A.2.2 Binarized image and feature extraction
Figure A.3 – Images of S- and P-polarized components,and Ψ’ for gold-plating with lustre non-uniformity
Figure A.4 – Image examples of gold-plating with lustre non-uniformity
14 A.2.3 Frequency analysis of feature quantities
A.2.4 Final estimate
Figure A.5 – Example of frequency analysis of feature quantity
Figure A.6 – Example of the final estimate of the quality of gold-plating
15 Annex B (informative) Example of tested result for colour non-uniformity inspection
B.1 Image analysis of colour non-uniformity
Figure B.1 – Images of gold-plating pads
16 B.2 Feature extraction and discriminant analysis
Figure B.2 – Images of colour distribution
Figure B.3 – Frequency analysis example of a feature quantity
17 Figure B.4 – Example of the discriminant analysis result
18 Bibliography

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BSI PD IEC/TS 61189-3-301:2016
$102.76