US 11,923,147 B2
Film capacitor
Satoru Jogan, Nagaokakyo (JP); and Hiroki Kitamura, Nishinomiya (JP)
Assigned to MURATA MANUFACTURING CO., LTD., Nagaokakyo (JP)
Filed by Murata Manufacturing Co., Ltd., Nagaokakyo (JP)
Filed on Dec. 20, 2021, as Appl. No. 17/555,637.
Application 17/555,637 is a continuation of application No. PCT/JP2020/018698, filed on May 8, 2020.
Claims priority of application No. 2019-157102 (JP), filed on Aug. 29, 2019.
Prior Publication US 2022/0115183 A1, Apr. 14, 2022
Int. Cl. H01G 4/224 (2006.01); H01G 4/30 (2006.01); H01G 4/32 (2006.01)
CPC H01G 4/224 (2013.01) [H01G 4/30 (2013.01); H01G 4/32 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A film capacitor comprising:
an outer case defining an opening;
a capacitor element within the outer case, the capacitor element including one or more metallized films, each metallized film including a resin film and a metal layer on a surface of the resin film; and
a filling resin that fills a space between the capacitor element and the outer case,
wherein the filling resin includes a first filling resin layer surrounding the capacitor element and a second filling resin layer disposed closer to the opening of the outer case than the first filling resin layer,
the first filling resin layer and the second filling resin layer are made of the same resin and each contain a filler,
a filler content of the second filling resin layer is higher than a filler content of a portion of the first filling resin layer opposing the second filling resin layer, and
an average filler content of the first filling resin layer is equal to the filler content of the second filling resin layer.