New approach to breakdown study by measuring pre-breakdown current in insulating materials

A technique of measuring current prior to breakdown was introduced. The breakdown mechanism was discussed on the basis of results obtained for polythylene (PE) and polymide (PI) by applying dc ramp voltage. At 90°C the pre-breakdown current of PI sharply increased from about 1 msec before breakdown....

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Bibliographic Details
Published inJapanese Journal of Applied Physics Vol. 23; no. 12; pp. 886 - 888
Main Authors HIKITA, M, TAJIMA, S, KANNO, I, SAWA, G, IEDA, M
Format Journal Article
LanguageEnglish
Published Tokyo Japanese journal of applied physics 01.01.1984
Subjects
Applied sciences
Electrical, magnetic and optical properties
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Properties and characterization
Polyimide
Polyethylene
Temperature
Electric breakdown
Electrical properties
Dielectric materials
Reaction mechanism
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Summary:A technique of measuring current prior to breakdown was introduced. The breakdown mechanism was discussed on the basis of results obtained for polythylene (PE) and polymide (PI) by applying dc ramp voltage. At 90°C the pre-breakdown current of PI sharply increased from about 1 msec before breakdown. For PE, the sharp current increase could not be detected till about 100 ns before breakdown, which is the resolution limit of the measuring system. If this sharp increase is due to the temperature rise of the sample, thermal breakdown may be dominant in the case of PI but not of PE.
ISSN:0021-4922
1347-4065
DOI:10.1143/jjap.23.l886