US 12,381,038 B2
Film capacitor
Satoru Jogan, Nagaokakyo (JP); Ryo Majima, Nagaokakyo (JP); and Kimiaki Kikuchi, Nishinomiya (JP)
Assigned to MURATA MANUFACTURING CO., LTD., Nagaokakyo (JP); and SHIZUKI ELECTRIC CO., INC., Nishinomiya (JP)
Filed by Murata Manufacturing Co., Ltd., Nagaokakyo (JP); and Shizuki Electric Co., Inc., Nishinomiya-shi (JP)
Filed on Jan. 11, 2022, as Appl. No. 17/573,051.
Application 17/573,051 is a continuation of application No. PCT/JP2020/017741, filed on Apr. 24, 2020.
Claims priority of application No. 2019-158673 (JP), filed on Aug. 30, 2019.
Prior Publication US 2022/0130611 A1, Apr. 28, 2022
Int. Cl. H01G 4/248 (2006.01); H01G 4/18 (2006.01); H01G 4/32 (2006.01)
CPC H01G 4/248 (2013.01) [H01G 4/18 (2013.01); H01G 4/32 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A film capacitor comprising:
a laminate including:
a first dielectric film having a first main surface and a second main surface opposing each other;
a second dielectric film having a third main surface and a fourth main surface opposing each other;
a first metal layer on the first main surface of the first dielectric film; and
a second metal layer on one of the second main surface of the first dielectric film and the third main surface of the second dielectric film,
the first dielectric film, the second dielectric film, the first metal layer, and the second metal layer being laminated in a laminate direction;
a first external electrode on a first end surface of the laminate in a width direction perpendicular to the laminate direction and connected to the first metal layer; and
a second external electrode on a second end surface of the laminate in the width direction,
the first external electrode having first protrusions arranged in the laminate direction and protruding toward the second external electrode in the width direction,
at least one of the first protrusions of the first external electrode having a first protrusion end with a length in the laminate direction greater than a total thickness of the first dielectric film and the second dielectric film by two times or more, and
a surface of the first protrusion end of the at least one of the first protrusions of the first external electrode has a level difference of 10 μm or less.