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SMTnet Express, July 13, 2017, Subscribers: 30,584, Companies: 10,624, Users: 23,496

Technical Library

Divergence in Test Results Using IPC Standard SIR and Ionic Contamination Measurements

K. Tellefsen, M. Holtzer, T. Cucu, M. Liberatore, M. Schmidt - Alpha Assembly Solutions, S. Moser, L. Henneken, P. Eckold, U. Welzel, R. Fritsch, D. Schlenker - Robert Bosch GmbH

Controlled humidity and temperature controlled surface insulation resistance (SIR) measurements of flux covered test vehicles, subject to a direct current (D.C.) bias voltage are recognized by a number of global standards organizations as the preferred method to determine if no clean solder paste and wave soldering flux residues are suitable for reliable electronic assemblies. The IPC, Japanese Industry Standard (JIS), Deutsches Institut fur Normung (DIN) and International Electrical Commission (IEC) all have industry reviewed standards using similar variations of this measurement. (...)

This study will compare the results from testing two solder pastes using the IPC-J-STD-004B, IPC TM-650 2.6.3.7 surface insulation resistance test, and IPC TM-650 2.3.25 in an attempt to investigate the correlation of ROSE methods as predictors of electronic assembly electrical reliability.

Forum search results for related keywords: ionic contamination test, surface insulation resistance.


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SMTA - Surface Mount Technology Association is a non-profit international association of companies and individuals (totalling 4,000) involved in all aspects of advanced electronics assembly, surface mount and related technologies.

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IPC - Association Connecting Electronics Industries is a US-based trade association dedicated to the competitive excellence and financial success of its nearly 2,600 member companies which represent all facets of the electronic interconnection industry, including design, printed wiring board manufacturing and electronics assembly.

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Technical Editor - Davef (submit your technical articles)

Newsletter Editor - Anna Girouard

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