エレクトロニクス実装学会誌
Online ISSN : 1884-121X
Print ISSN : 1343-9677
ISSN-L : 1343-9677
プリント配線板用絶縁材料の劣化試験中における内部電荷挙動の観測
福永 香岡本 健次前野 恭
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2006 年 9 巻 2 号 p. 119-122

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The internal charge behaviour of insulation layers of printed circuit boards is discussed. Internal charges due to ion impurities can move under adc electric field, and the internal electric field is determined by the charges. The charge behaviour is strongly influenced by temperature and humidity. We have newly developed an in-situ space charge measurement system that can measure the space charge profiles in an environmental chamber at 85°C and 85%. Larger levels of internal charge were observed at higher humidity, and the electric fields near the electrodes were increased. The in-situ space charge measurement system should contribute to the study of ageing phenomena of insulation layers of PCBs.

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