| 摘要 |
PROBLEM TO BE SOLVED: To provide a product which has a stable breakdown voltage by suppressing a beat sound when using a dry type metallized polypropylene film capacitor with a high voltage at high frequency. SOLUTION: A device formed by winding a metallized polypropylene film is heat-pressed at a temperature of 80 to 120°C under a press pressure of 500×10<SP>4</SP>to 800×10<SP>4</SP>Pa, then metallized contact portions are formed on both winding end surfaces, and heat aging is performed at 80 to 120°C. COPYRIGHT: (C)2009,JPO&INPIT
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