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Latent short circuit failure in high-rel PCBs caused by lack of cleanliness of PCB processes and base materials

Published:

March 10, 2021

Author:

Stan Heltzel

Abstract:

Latent short circuit failures have been observed during testing of Printed Circuit Boards (PCB) for power distribution of spacecraft of the European Space Agency. Root cause analysis indicates that foreign fibers may have contaminated the PCB laminate. These fibers can provide a pathway for electromigration if they bridge the clearance between nets of different potential in the presence of humidity attracted by the hygroscopic laminate resin. PCB manufacturers report poor yield caused by contamination embedded in laminate. Inspections show ......

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Company Information:

European Space Agency

The European Space Agency is an intergovernmental organisation of 22 member states dedicated to the exploration of space. Established in 1975 and headquartered in Paris, ESA has a worldwide staff of about 2,200 in 2018 and an annu

75345 Paris CEDEX 7, France

Research Institute / Laboratory

  • Phone +33 1 53 69 76 54

European Space Agency website

Company Postings:

(1) technical library article

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