渦電流探傷技術によるプリント配線の欠陥検出

概要

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Eddy-current testing (ECT) is apowerful and useful technique for detecting crack and flaws in uniform conductive plates and pipes. We investigated the diagnostics of printed circuit boarda (PCBs) as a new application of ECT. Recent high-density PCBa require a new costeffective testing system for the production phase. ECT is an interesting approach for inspection of as-made printed wirings, because it uses non-contact testing, low stress, conductive testing, and fast scanning. This paper describes the detection characteristics for some flaws in printed wirings. We experimentally examined the use of ECT for inspecting dusconnections, chipping defects, and imperfections in the thickness of printed wirings. The results confirm than the ECT approach is attractive and effective for PCB diagnostics.
社団法人日本磁気学会の論文
1998-04-15