Film capacitor, combination type capacitor, inverter, and electric vehicle
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United States of America Patent
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Feb 16, 2021
Grant Date -
Jun 6, 2019
app pub date -
Jan 24, 2019
filing date -
Jul 26, 2016
priority date (Note) -
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Abstract
A film capacitor includes a main body portion and external electrodes. The main body portion includes a dielectric film and a metal film that is disposed on one surface of the dielectric film. The metal film has surface roughnesses of S1 and S2 where S1 denotes a surface roughness of the metal film in a first direction, and S2 denotes a surface roughness of the metal film in a second direction. The first direction is perpendicular to the second direction. S1 is greater than S2. The main body portion includes a pair of ends in the first direction thereof. The external electrodes are disposed on the pair of ends in the first direction of the main body portion, respectively. An average value of fractal dimensions of irregularity boundary lines due to wrinkles of the metal film is 1.08 or more.
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