Murata Manufacturing Co., Ltd.

Kazuto Yamazaki

Tomoki Inakura

A film capacitor that includes: a wound body in which a dielectric film and a metal layer are wound, the dielectric film including a cured product of a first organic material having a hydroxy group and a second organic material that is an aromatic compound having an isocyanate group, the dielectric film including a first main surface and a second main surface opposed to each other in a thickness direction, the metal layer being disposed at least on the first main surface of the dielectric film. The first main surface of the dielectric film includes a plurality of protrusions having the second organic material. In an area range of 100 μm by 140 μm of the first main surface of the dielectric film, a skewness of the first main surface of the dielectric film is 0.782 to 14.3.

Film capacitor, film, and metallized film

A film capacitor that includes a wound body having a dielectric film and a metal layer. When a film face positioned at an average height in the thickness direction is defined in an area range of 100 μm by 140 μm of the first main surface of the dielectric film, an area ratio of a region having a height higher than the film face by 0.05 μm or more and less than 0.20 μm is 6.04% or less, an area ratio of a region having a height higher than the film face by 0.20 μm or more and less than 2.50 μm is 0.0998% to 1.13%, and an area ratio of a region having a height higher than the film face by 2.50 μm or more is 0.100% or less.

A film capacitor that includes a wound body having a dielectric film and a metal layer, the dielectric film including a cured product of a first organic material having a hydroxy group and a second organic material that is an aromatic compound having an isocyanate group, the metal layer being disposed at least on a first main surface of the dielectric film. The first main surface of the dielectric film includes a plurality of protrusions having the second organic material. In an area range of 100 μm by 140 μm of the first main surface of the dielectric film, the plurality of the protrusions have an average diameter of 0.58 μm to 5.98 μm and an average height of 0.11 μm to 2.54 μm, and a number of the plurality of the protrusions ranges from 50 to 450.

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Nagaokakyo, Japan

Kazuto Yamazaki