| 摘要 |
PROBLEM TO BE SOLVED: To achieve high heat resistance and high withstand voltage at the same time regarding a metallized film capacitor used for a motor vehicle or the like. SOLUTION: The capacitor comprises an element whereon a pair of metallized films are wound so that a metal vapor deposition electrode 2 is disposed opposed via a dielectric film 1 and a metallicon electrode 4 formed in both ends of the element. A PEN film which does not contain a filler is used as the dielectric film 1 and thermal contraction rate of the PEN film in a longitudinal direction at 150°C is 1.5 to 4.0%. According to this constitution, unevenness of a film surface is reduced as filler is not incorporated, and the film does not bite air when the dielectric film 1 is wound in lamination. Furthermore, since thermal contraction rate in a longitudinal direction is large, an element of higher winding fastening force can be obtained by carrying out thermal aging, thus achieving high heat resistance and high withstand voltage at the same time. COPYRIGHT: (C)2009,JPO&INPIT
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