Investigation, analysis and determination of inclusions in high-tolerance board design.

Scott, Andrea and Buchanan, William J (2000) Investigation, analysis and determination of inclusions in high-tolerance board design. Circuit World, 26 (2). pp. 7-9. ISSN 0305-6120

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    This paper outlines the inclusions in laminates that can cause the false rejection in printed circuit board (PCB) manufacture. Laminate inclusions are now becoming prevalent because of the higher resolution required for the inspection of reduced track and gap widths. Visual methods have been used to identify four main types of inclusions; these are: tadpoles, resin burnt, metal, and others. Tadpoles have been identified for the first time, and are small black-tailed formations. Metal inclusions contain three main metallic components: chromium, iron and titanium. The paper also outlines the possible sources of these inclusions. For tadpole inclusions, the paper discusses the use of Scanning Electron-Microscope Energy Disperse X-Ray analysis to identify their constituent elements. Other methods of analysis are also discussed, such as Fourier Transform Infra-Red analysis.

    Item Type: Article
    Print ISSN: 0305-6120
    Electronic ISSN: 1758-602X
    Uncontrolled Keywords: Printed circuit boards; laminates; fault analysis; design;
    University Divisions/Research Centres: Faculty of Engineering, Computing and Creative Industries > School of Computing
    Dewey Decimal Subjects: 600 Technology > 620 Engineering > 621 Electronic & mechanical engineering > 621.3 Electrical & electronic engineering > 621.38 Electronics & Communications engineering
    Library of Congress Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
    Item ID: 4023
    Depositing User: Professor Bill Buchanan
    Date Deposited: 12 Jan 2011 14:36
    Last Modified: 13 Sep 2013 16:29

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