公开(公告)号：US20240321522A1

公开(公告)日：2024-09-26

申请号：US18734128

申请日：2024-06-05

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Shunsuke AKIBA

IPC: H01G4/33 ,  H01G4/18

CPC classification number: H01G4/33 ,  H01G4/18

Abstract: A film capacitor that includes: a dielectric film; and a metal layer on at least one surface of the dielectric film. The dielectric film is a resin film made of a cured product of a first organic material having multiple hydroxy groups in a molecule and a second organic material having multiple isocyanate groups in a molecule. An intensity ratio of a first peak at 1680 cm−1 to 1770 cm−1 derived from carbonyl groups in urethane bonds to a second peak at 1560 cm−1 to 1620 cm−1 derived from aromatic rings in a Fourier-transform infrared spectroscopy (FT-IR) spectrum of the resin film is 0.50 to 0.94.

公开(公告)号：US20240331948A1

公开(公告)日：2024-10-03

申请号：US18735641

申请日：2024-06-06

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Shunsuke AKIBA ,  Tomomichi ICHIKAWA ,  Yumie KAWASAKI ,  Kazuto YAMAZAKI

IPC: H01G4/32 ,  G01N23/22 ,  H01G4/18

CPC classification number: H01G4/32 ,  G01N23/22 ,  H01G4/18

Abstract: A film capacitor that includes: a dielectric resin film having a first surface and a second surface opposite each other; a first metal layer on the first surface; and a second metal layer on the second surface, wherein in a mapping image of nitrogen atoms observed by energy dispersive X-ray spectroscopy in a section of the dielectric resin film along a thickness direction of the dielectric resin film, a ratio of an area of nitrogen atom aggregation regions to an entire observation area is 35% or less.