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公开(公告)号：US10395829B2
公开(公告)日：2019-08-27
申请号：US14254973
申请日：2014-04-17
Applicant: MURATA MANUFACTURING CO., LTD.
Inventor： Tomomichi Ichikawa , Norihiro Yoshikawa , Ichiro Nakamura , Shinichi Kobayashi , Ichiro Nakaso , Yasunori Hioki , Tomoki Inakura
Abstract: A dielectric resin composition for a film capacitor is a mixture containing an organic material A and an organic material B. The organic material A includes at least two kinds of organic material components A1, A2, . . . having reactive groups (for example, OH, NCO) that cross-link each other. The organic material B does not have a reactive site capable of reacting with the organic material A and has a dielectric loss tan δ of 0.3% or less at a temperature of 125° C. The mixture has a glass transition temperature of 130° C. or higher and preferably 280° C. or lower.
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公开(公告)号：US11948748B2
公开(公告)日：2024-04-02
申请号：US17743598
申请日：2022-05-13
Applicant: Murata Manufacturing Co., Ltd. , Shizuki Electric Co., Inc.
Inventor： Tomoki Inakura , Tomomichi Ichikawa , Atsushi Kawabata
CPC classification number: H01G4/14 , C08G18/48 , C08G18/7692 , H01G4/32 , H01G4/33 , H01G4/232 , H01G4/248
Abstract: A film capacitor that includes a dielectric resin film containing a cured product of a first organic material and a second organic material; and a metal layer on at least one surface of the dielectric resin film. The first organic material contains an organic polymer having a hydroxy group and a benzene ring in a repeating unit; the second organic material contains 4,4′-diphenylmethane diisocyanate, a modified product of 4,4′-diphenylmethane diisocyanate, or a mixture thereof; and 400 ppm to 700 ppm of chlorine ions and 300 ppm to 500 ppm of phosphorus ions are present inside the dielectric resin film.
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公开(公告)号：US11710603B2
公开(公告)日：2023-07-25
申请号：US16918403
申请日：2020-07-01
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Senichi Ozasa , Takuya Sakamoto , Tomomichi Ichikawa
Abstract: A film capacitor that includes first and second dielectric films, first and second inner electrodes, and first and second outer electrodes. The first inner electrode includes a first connection portion, a first main electrode portion joined to the first connection portion and thinner than the first connection portion, and a first thin portion extending from the first main electrode portion and thinner than the first main electrode portion. The second inner electrode includes a second connection portion and a second main electrode portion joined to the second connection portion and thinner than the second connection portion. The first main electrode portion opposes the second main electrode portion across the first dielectric film. The second connection portion includes a reduction region having a thickness that decreases from the second connection portion toward the second main electrode portion. The first thin portion opposes the reduction region across the first dielectric film.
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公开(公告)号：US11373806B2
公开(公告)日：2022-06-28
申请号：US16814095
申请日：2020-03-10
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Tomomichi Ichikawa , Tomoki Inakura , Shinichi Kobayashi
Abstract: A film capacitor that includes a dielectric resin film and a metal layer on one surface of the dielectric resin film. The dielectric resin film has a crosslink density at 225° C. of 2700 mol/m3 or more, or the dielectric resin film has a storage elastic modulus at 125° C. of 1.1 GPa or more.
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公开(公告)号：US11476054B2
公开(公告)日：2022-10-18
申请号：US16814183
申请日：2020-03-10
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Tomomichi Ichikawa , Tomoki Inakura , Shinichi Kobayashi
Abstract: A film capacitor that includes a metallized film having a metal layer on one surface of a dielectric resin film, in which, when a thermal expansion coefficient of the metallized film is αP and a thermal expansion coefficient of the metal layer is αM, a value of αP/αM is 5.1 or less.
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Patent Agency Ranking
公开(公告)号：US11335502B2
公开(公告)日：2022-05-17
申请号：US16524414
申请日：2019-07-29
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Tomomichi Ichikawa , Shinichi Kobayashi , Tomoki Inakura
Abstract: A film capacitor that includes a dielectric resin film having a first surface and a second surface opposite to the first surface, the second surface having a silicone resin-containing layer; a first metal layer opposite to the first surface of the dielectric resin film; and a second metal layer opposed to the second surface of the dielectric resin film.
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公开(公告)号：US11295898B2
公开(公告)日：2022-04-05
申请号：US16814216
申请日：2020-03-10
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Tomoki Inakura , Shinichi Kobayashi , Tomomichi Ichikawa
Abstract: A film capacitor that includes a resin layer having a linear protrusion on a first surface thereof and a linear recess on a second surface thereof opposite the first surface, and a metal layer on the first surface of the resin layer. A total length of the linear recess per 1 cm2 is 3 m or less, and an average depth of the linear recess is 0.01 μm to 1.3 μm.
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公开(公告)号：US09105408B2
公开(公告)日：2015-08-11
申请号：US14472604
申请日：2014-08-29
Applicant: MURATA MANUFACTURING CO., LTD.
Inventor： Tomomichi Ichikawa , Norihiro Yoshikawa , Shinichi Kobayashi , Yasunori Hioki , Ichiro Nakaso , Tomoki Inakura
IPC: C08L27/10 , H01G4/18 , C08G18/58 , C08L63/00 , C08L71/10 , C08G18/62 , C08G18/79 , C08G18/80 , C08G18/40 , H01G4/32 , H01G4/33 , C08L43/00 , C08L61/28
CPC classification number: H01G4/18 , C08G18/4063 , C08G18/58 , C08G18/6212 , C08G18/721 , C08G18/7671 , C08G18/797 , C08G18/8029 , C08G2650/56 , C08L61/28 , C08L63/00 , C08L71/00 , C08L71/10 , H01G4/32 , H01G4/33
Abstract: A resin composition constituting dielectric resin films of a film capacitor includes a first atom group including at least one functional group selected from among a methylene group, an aromatic ring and an ether group and having a relatively small molar polarizability, and a second atom group including at least one functional group selected from among a hydroxyl group, an amino group and a carbonyl group and having a relatively large molar polarizability. The resin composition satisfies the condition that a value calculated from the formula (sum of absorption band intensities of first atom group)/(sum of absorption band intensities of second atom group) is 1.0 or more. Herein, as absorption band intensities of the functional groups, peak intensities detected in specific wavenumber ranges are employed.
Abstract translation: 构成薄膜电容器的介电树脂薄膜的树脂组合物包括：包含至少一种选自亚甲基，芳香环和醚基并具有相对较小的摩尔极化率的官能团的第一原子团和包含 选自羟基，氨基和羰基中的至少一种官能团，并且具有相对较大的摩尔极化率。 树脂组合物满足从式（第一原子组的吸收带强度之和）/（第二原子团的吸收带强度之和）计算出的值为1.0以上的条件。 这里，作为官能团的吸收带强度，使用在特定波数范围内检测出的峰值强度。
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公开(公告)号：US11791099B2
公开(公告)日：2023-10-17
申请号：US16884529
申请日：2020-05-27
Applicant: Murata Manufacturing Co., Ltd. , Shizuki Electric Co., Inc.
Inventor： Satoru Jogan , Shinichi Kobayashi , Tomomichi Ichikawa , Satoshi Kamei , Kimiaki Kikuchi
IPC: H01G4/224 , C08K5/13 , C08K7/00 , C08K7/04 , C08K13/04 , H01G4/32 , H01G4/33 , C08L63/00 , H01G4/005 , H05K1/03 , C08J5/18
CPC classification number: H01G4/224 , C08J5/18 , C08K5/13 , C08K7/00 , C08K7/04 , C08K13/04 , C08L63/00 , H01G4/005 , H01G4/32 , H01G4/33 , H05K1/0373 , C08J2375/04
Abstract: A film capacitor that includes a capacitor element including one or more wound or laminated metallized films, each metallized film including a resin film and a metal layer on a surface of the resin film; an outer case that houses the capacitor element; and a filling resin that fills a space between the capacitor element and the outer case, wherein the outer case is made of a resin composition containing a liquid crystal polymer and an inorganic filler.
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公开(公告)号：US20200294717A1
公开(公告)日：2020-09-17
申请号：US16884529
申请日：2020-05-27
Applicant: Murata Manufacturing Co., Ltd. , Shizuki Electric Co., Inc.
Inventor： Satoru Jogan , Shinichi Kobayashi , Tomomichi Ichikawa , Satoshi Kamei , Kimiaki Kikuchi
Abstract: A film capacitor that includes a capacitor element including one or more wound or laminated metallized films, each metallized film including a resin film and a metal layer on a surface of the resin film; an outer case that houses the capacitor element; and a filling resin that fills a space between the capacitor element and the outer case, wherein the outer case is made of a resin composition containing a liquid crystal polymer and an inorganic filler.
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