US 12,224,125 B2
Film capacitor
Senichi Ozasa, Nishinomiya (JP); and Tomomichi Ichikawa, Nagaokakyo (JP)
Assigned to SHIZUKI ELECTRIC CO., INC., Nishinomiya (JP); and MURATA MANUFACTURING CO., LTD., Nagaokakyo (JP)
Filed by Shizuki Electric Co., Inc., Nishinomiya (JP); and Murata Manufacturing Co., Ltd., Nagaokakyo (JP)
Filed on Mar. 23, 2023, as Appl. No. 18/188,813.
Application 18/188,813 is a continuation of application No. PCT/JP2021/034556, filed on Sep. 21, 2021.
Claims priority of application No. 2020-158884 (JP), filed on Sep. 23, 2020.
Prior Publication US 2023/0230769 A1, Jul. 20, 2023
Int. Cl. H01G 4/14 (2006.01); C08G 18/58 (2006.01); C08G 18/76 (2006.01); H01G 4/32 (2006.01)
CPC H01G 4/14 (2013.01) [C08G 18/58 (2013.01); C08G 18/7671 (2013.01); H01G 4/32 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A film capacitor comprising:
a dielectric resin film made of a thermosetting urethane resin; and
a metal layer on at least one surface of the dielectric resin film,
wherein the dielectric resin film contains at least an isocyanate group and a carbonyl group, and
a ratio of a first absorption peak intensity of the isocyanate group in a wave number range of 2200 cm−1 to 2350 cm−1 to a second absorption peak intensity of the carbonyl group in a wave number range of 1650 cm−1 to 1800 cm−1 is 0.08 to 1.15.