US 12,217,912 B2
Film capacitor, film, and metallized film
Kazuto Yamazaki, Nagaokakyo (JP); and Tomoki Inakura, Nagaokakyo (JP)
Assigned to MURATA MANUFACTURING CO., LTD., Nagaokakyo (JP)
Filed by Murata Manufacturing Co., Ltd., Nagaokakyo (JP)
Filed on Apr. 4, 2023, as Appl. No. 18/295,604.
Application 18/295,604 is a continuation of application No. PCT/JP2021/036969, filed on Oct. 6, 2021.
Claims priority of application No. 2020-171216 (JP), filed on Oct. 9, 2020.
Prior Publication US 2023/0298822 A1, Sep. 21, 2023
Int. Cl. H01G 4/14 (2006.01); H01B 3/30 (2006.01); H01B 5/14 (2006.01); H01B 17/56 (2006.01); H01G 4/012 (2006.01); H01G 4/32 (2006.01)
CPC H01G 4/14 (2013.01) [H01B 5/14 (2013.01); H01B 17/56 (2013.01); H01G 4/012 (2013.01); H01G 4/32 (2013.01); H01B 3/302 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A film capacitor comprising:
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,
wherein the first main surface of the dielectric film includes a plurality of protrusions having the second organic material, and
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.