WO2021038963A1 - フィルムコンデンサ - Google Patents

フィルムコンデンサ Download PDF

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Publication number
WO2021038963A1
WO2021038963A1 PCT/JP2020/017756 JP2020017756W WO2021038963A1 WO 2021038963 A1 WO2021038963 A1 WO 2021038963A1 JP 2020017756 W JP2020017756 W JP 2020017756W WO 2021038963 A1 WO2021038963 A1 WO 2021038963A1
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WIPO (PCT)
Prior art keywords
external electrode
film
metal layer
metal
film capacitor
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Application number
PCT/JP2020/017756
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English (en)
French (fr)
Japanese (ja)
Inventor
賢 城岸
菊池　公明
亀井　聡
智道 市川
Original Assignee
株式会社村田製作所
株式会社指月電機製作所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 株式会社村田製作所, 株式会社指月電機製作所 filed Critical 株式会社村田製作所
Priority to JP2021541997A priority Critical patent/JP7312261B2/ja
Priority to CN202090000813.XU priority patent/CN217507111U/zh
Publication of WO2021038963A1 publication Critical patent/WO2021038963A1/ja

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G4/00—Fixed capacitors; Processes of their manufacture
    • H01G4/002—Details
    • H01G4/228—Terminals
    • H01G4/252—Terminals the terminals being coated on the capacitive element
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G4/00—Fixed capacitors; Processes of their manufacture
    • H01G4/32—Wound capacitors

Definitions

  • the present invention relates to a film capacitor.
  • a film capacitor is generally manufactured by winding or laminating a metallized film having a metal layer on the surface of a dielectric film and forming a pair of external electrodes on both end faces thereof.
  • the external electrode is usually formed by thermal spraying of a metal called a metallikon.
  • Such a film capacitor has a structure of being housed in an outer case and then sealed with a sealing resin such as an epoxy resin, for example, as described in Patent Document 1 and the like.
  • the external electrode may be damaged by the stress when the sealing resin expands or contracts due to the change in the ambient temperature.
  • the external electrode is easily damaged at the ridgeline portion of the external electrode where stress is concentrated, that is, at the outer peripheral end of the external electrode.
  • the present invention has been made to solve the above problems, and an object of the present invention is to provide a film capacitor in which an external electrode is not easily damaged.
  • the film capacitor of the present invention has a laminate in which a film containing a metallized film having a metal layer provided on at least one main surface of a dielectric film is laminated in the lamination direction, and a laminate in a width direction orthogonal to the lamination direction.
  • a first external electrode and a second external electrode provided on both end faces of the laminated body are provided, and the first external electrode is a first portion and a second portion surrounded by the first portion.
  • the surface layer of the first portion of the first external electrode is closer to the second external electrode than the surface layer of the second portion of the first external electrode. In position.
  • FIG. 1 is a perspective view schematically showing an example of the film capacitor of the present invention.
  • 2A is a cross-sectional view taken along the line IIa-IIa of the film capacitor shown in FIG. 1
  • FIG. 2B is an enlarged cross-sectional view of the IIb portion of FIG. 2A.
  • FIG. 3A is a cross-sectional view taken along the line IIIa-IIIa of the film capacitors shown in FIGS. 1 and 2A
  • FIG. 3B is an enlarged cross-sectional view of a portion IIIb of FIG. 3A.
  • FIG. 4 is a perspective view schematically showing an example of a laminated state of the metallized film contained in the laminated body constituting the film capacitor shown in FIG. 1.
  • FIG. 5 is a perspective view schematically showing an example of a wound state of the laminate constituting the film capacitor shown in FIG. 1.
  • 6A and 6B are perspective views schematically showing an example of how to use the film capacitor shown in FIG. 1.
  • FIG. 7 is a perspective view schematically showing an example of a method of forming an external electrode.
  • FIG. 8 is a cross-sectional view schematically showing an example of a method of forming a step on the first external electrode.
  • FIG. 9 is a cross-sectional view schematically showing an example of a method of forming a metal portion connected to the first external electrode 11.
  • the film capacitor of the present invention will be described.
  • the present invention is not limited to the following configuration, and may be appropriately modified without departing from the gist of the present invention.
  • a combination of a plurality of individual preferred configurations described below is also the present invention.
  • the film capacitor of the present invention As an example of the film capacitor of the present invention, a so-called winding type film capacitor, which is wound in a state where a dielectric film and a metal layer are laminated, will be described below.
  • the film capacitor of the present invention may be a so-called laminated film capacitor in which dielectric films and metal layers are alternately laminated.
  • FIG. 1 is a perspective view schematically showing an example of the film capacitor of the present invention.
  • 2A is a cross-sectional view taken along the line IIa-IIa of the film capacitor shown in FIG. 1, and FIG. 2B is an enlarged cross-sectional view of the IIb portion of FIG. 2A.
  • FIG. 3A is a cross-sectional view taken along the line IIIa-IIIa of the film capacitors shown in FIGS. 1 and 2A, and FIG. 3B is an enlarged cross-sectional view of a portion IIIb of FIG. 3A.
  • the stacking direction and the width direction of the film capacitor are defined by arrows T and W, respectively, as shown in FIGS. 1, 2A, 2B, 3A and 3B, respectively. It can be said that the winding type film capacitor has a plurality of stacking directions, but in the present specification, the direction is defined by the arrow T.
  • the stacking direction T and the width direction W are orthogonal to each other.
  • the film capacitor 1 shown in FIG. 1 has a laminate 10, a first external electrode 11 provided on one end surface of the laminate 10 in the width direction W, and the other end surface of the laminate 10 in the width direction W.
  • a second external electrode 12 provided in the above is provided.
  • the laminated body 10 is wound with the first metallized film 21 and the second metallized film 22 laminated in the stacking direction T. It is a so-called winding body.
  • the film capacitor 1 is a winding type film capacitor including a laminated body 10 which is also such a winding body.
  • the cross-sectional shape of the laminated body 10 is pressed into a flat shape such as an ellipse or an oval, and the laminated body 10 is pressed. It is preferable that the cross-sectional shape of is smaller than that when it is a perfect circle.
  • FIG. 4 is a perspective view schematically showing an example of a laminated state of the metallized film contained in the laminated body constituting the film capacitor shown in FIG. 1.
  • the first metallized film 21 has a first metal layer 41 provided on one main surface of the first dielectric film 31.
  • the first metal layer 41 is provided so as to reach one side edge of the first metallized film 21 and not reach the other side edge of the first metallized film 21 in the width direction.
  • the second metallized film 22 is one in which a second metal layer 42 is provided on one main surface of the second dielectric film 32.
  • the second metal layer 42 is provided so as not to reach one side edge of the second metallized film 22 but to reach the other side edge of the second metallized film 22 in the width direction.
  • the first metallized film 21 and the second metallized film 22 are laminated in a state of being displaced in the width direction as shown by double-headed arrows Y1 and Y2. At this time, the main surfaces of the first metallized film 21 and the second metallized film 22 on which the first metal layer 41 and the second metal layer 42 are provided have the same orientation (upward in FIG. 4). It is laminated in the state of
  • FIG. 5 is a perspective view schematically showing an example of a wound state of the laminate constituting the film capacitor shown in FIG. 1.
  • the first metallized film 21 and the second metallized film 22 laminated in the state shown in FIG. 4 are first wound around the pre-wound film 23 in a roll shape as shown in FIG. To.
  • the second metallized film 22 is inside the first metallized film 21, the first metal layer 41 is inside the first dielectric film 31, and the second metal layer 42 is second.
  • the first metallized film 21 and the second metallized film 22 are wound in a laminated state so as to be inside the dielectric film 32 of the above.
  • a protective winding film 24 for protecting the first metallized film 21 and the second metallized film 22 is connected to the winding end portion of the second metallized film 22 by being wound in layers.
  • the protective winding film 24 is wound a plurality of times around the outer peripheral surface of the winding end portion of the laminated body 10.
  • the protective roll film 24 is fixed by heat welding using, for example, a heat seal or the like.
  • the laminate 10 is formed by winding the first metallized film 21 and the second metallized film 22 around the first-wound film 23 in a plurality of manners.
  • the capacitor is formed by sandwiching the first dielectric film 31 or the second dielectric film 32 between the pair of the first metal layer 41 and the second metal layer 42.
  • the second metal layer 42 is provided not on one main surface of the second dielectric film 32 but on the other main surface of the first dielectric film 31. It may have been.
  • the first metal layer 41 is provided on one main surface of the first dielectric film 31, and the second metal layer 42 is provided on the other main surface.
  • the metallized film and the second dielectric film 32 are wound in a laminated state.
  • the first external electrode 11 is provided on one end surface of the laminated body 10 and is connected to the first metal layer 41 by coming into contact with the exposed end portion of the first metal layer 41.
  • the second external electrode 12 is provided on the other end surface of the laminated body 10 and is connected to the second metal layer 42 by coming into contact with the exposed end portion of the second metal layer 42.
  • Examples of the constituent materials of the first external electrode 11 and the second external electrode 12 include metals such as zinc, aluminum, tin, and zinc-aluminum alloy. It is preferable that at least the portion of the first external electrode 11 connected to the first metal layer 41 is made of a zinc-aluminum alloy. It is preferable that at least the portion of the second external electrode 12 connected to the second metal layer 42 is made of a zinc-aluminum alloy.
  • the first external electrode 11 and the second external electrode 12 are preferably formed by spraying the metal onto one end face and the other end face of the laminate 10, respectively.
  • the first external electrode 11 has a first portion 11a and a second portion 11b surrounded by the first portion 11a.
  • the surface layer of the first portion 11a of the first external electrode 11 is second from the surface layer of the second portion 11b of the first external electrode 11. It is located near the external electrode 12. Therefore, a step 13 recessed toward the second external electrode 12 is provided at the outer peripheral end of the first external electrode 11.
  • the second external electrode 12 has a first portion 12a and a second portion 12b surrounded by the first portion 12a.
  • the surface layer of the first portion 12a of the second external electrode 12 is the first external electrode 11 from the surface layer of the second portion 12b of the second external electrode 12. It is in a position close to. Therefore, a step 13 recessed toward the first external electrode 11 is provided at the outer peripheral end of the second external electrode 12.
  • a step 13 is provided at the outer peripheral end of the first external electrode 11 or the second external electrode 12, the first external electrode 11 or the first external electrode 11 or when expansion or contraction of the sealing resin occurs due to a change in ambient temperature. Since the stress concentrated on the outer peripheral end of the second external electrode 12 is dispersed, the stress applied to the outer peripheral end of the first external electrode 11 or the second external electrode 12 can be relaxed. As a result, the first external electrode 11 or the second external electrode 12 is less likely to be damaged.
  • At least one of the external electrodes may have the first portions 11a and 12a and the second portions 11b and 12b. That is, a step 13 may be provided at the outer peripheral end of at least one of the first external electrode 11 and the second external electrode 12. Further, the step 13 is preferably provided on the entire circumference of the outer peripheral end of the first external electrode 11 or the second external electrode 12, but may be provided on a part of the outer peripheral end.
  • the shape of the step 13 is not particularly limited, and as shown in FIG. 3B, the step 13 may have a roundness.
  • the shape of the step 13 may be constant at the outer peripheral end of the first external electrode 11 or the second external electrode 12, or may differ from place to place. Further, the number of steps 13 is not particularly limited.
  • the end face of the laminate 10 on the first external electrode 11 side is the most of the laminate 10. It is preferable that the edge of the film located on the outside is recessed toward the second external electrode 12. Further, as shown in FIG. 3A, when the second external electrode 12 has the first portion 12a and the second portion 12b, the end face of the laminated body 10 on the second external electrode 12 side is the outermost of the laminated body 10. It is preferable that the end portion of the film located at is recessed toward the first external electrode 11.
  • the first external electrode 11 When the first external electrode 11 is formed by thermal spraying, the first external electrode 11 having the first portion 11a and the second portion 11b is provided by providing a recess at the end of the film located on the outermost side of the laminated body 10. Therefore, a step 13 can be formed at the outer peripheral end of the first external electrode 11.
  • the second external electrode 12 when the second external electrode 12 is formed by thermal spraying, the second portion 12a and the second portion 12b are provided by providing a recess at the end of the film located on the outermost side of the laminated body 10. Since the external electrode 12 can be formed, a step 13 can be formed at the outer peripheral end of the second external electrode 12.
  • the outermost film of the laminate 10 is preferably the protective roll film 24.
  • the width of the protective winding film 24 may be the same as the width of the first dielectric film 31 and the second dielectric film 32, or the width of the first dielectric film 31 and the second dielectric film 32. It may be shorter than the width. Even if the width of the protective winding film 24 is the same as the width of the first dielectric film 31 and the second dielectric film 32, the first dielectric film 31 and the second dielectric film 32 are in the width direction. Since the films are laminated in a staggered manner, a dent is formed at the end of the protective roll film 24. Therefore, when the first external electrode 11 and the second external electrode 12 are formed by thermal spraying, a step 13 can be formed at the outer peripheral end of the first external electrode 11 or the second external electrode 12.
  • the outermost film of the laminate 10 is the protective winding film 24, as shown in FIGS. 3A and 3B, the end portion of the first dielectric film 31 and the end portion of the second dielectric film 32. It is preferable that the end portion of the protective roll film 24 is arranged between the two.
  • the metal portion 14 when the first external electrode 11 has the first portion 11a and the second portion 11b, the metal portion 14 may be connected to the first external electrode 11. When projected in the width direction W, the metal portion 14 is provided at a position overlapping the first portion 11a of the first external electrode 11. That is, the metal portion 14 is provided so as to cover the step 13. Further, as shown in FIG. 3A, when the second external electrode 12 has the first portion 12a and the second portion 12b, the metal portion 14 may be connected to the second external electrode 12. When projected in the width direction W, the metal portion 14 is provided at a position overlapping the first portion 12a of the second external electrode 12. That is, the metal portion 14 is provided so as to cover the step 13.
  • the metal portion 14 is weakly connected to the first external electrode 11 or the second external electrode 12 by the anchor effect.
  • the metal portion 14 preferably has a lower density than the first external electrode 11 or the second external electrode 12.
  • the film capacitor 1 is housed in the outer case and sealed with a sealing resin.
  • the stress applied to the joint portion between the first metallized film 21 and the first external electrode 11 or the joint portion between the second metallized film 22 and the second external electrode 12 can be relaxed. .. The reason will be described with reference to FIGS. 6A and 6B below.
  • FIG. 6A and 6B are perspective views schematically showing an example of how to use the film capacitor shown in FIG. 1.
  • the film capacitor 1 is housed in the outer case 50.
  • the first lead terminal 51 is electrically connected to the first external electrode 11, and the second lead terminal 52 is electrically connected to the second external electrode 12.
  • FIG. 6B by filling the inside of the outer case 50 with the sealing resin 53, the periphery of the film capacitor 1 is covered with the sealing resin 53, and the opening of the outer case 50 is sealed. ..
  • the first lead terminal 51 and the second lead terminal 52 project from the inside of the outer case 50 toward the outside.
  • a film capacitor housed in an outer case and sealed with a sealing resin is exposed to a sudden change in external temperature, and the outer outer case and the sealing resin are compared with the inner laminate and the outer electrode.
  • the temperature of is changed in advance. Therefore, when the external temperature changes, the outer case and the sealing resin expand or contract in advance. As a result, the external electrode receives compressive stress or tensile stress from the sealing resin, and the joint portion between the metallized film and the external electrode may be peeled off.
  • the metal portion 14 is connected to the first external electrode 11 or the second external electrode 12 so as to cover the step 13, instead of the first external electrode 11 or the second external electrode 12.
  • the metal portion 14 is destroyed by receiving compressive stress or tensile stress from the sealing resin 53. Therefore, the stress applied to the joint portion between the first metallized film 21 and the first external electrode 11 or the joint portion between the second metallized film 22 and the second external electrode 12 can be relaxed. .. As a result, peeling of the joint portion is less likely to occur.
  • the metal portion 14 preferably exists on a flat surface.
  • the metal portion 14 may be present in the entire flat surface or a part of the flat surface.
  • the shape of the metal portion 14 is not particularly limited, and may not protrude from the first external electrode 11 or the second external electrode 12, or may protrude from the first external electrode 11.
  • the shape of the metal portion 14 may be constant at the outer peripheral end of the first external electrode 11 or the second external electrode 12, or may differ from place to place.
  • the metal portion 14 can be formed by spraying the metal constituting the first external electrode 11 and the second external electrode 12. In that case, the metal portion 14 is made of the same metal as the first external electrode 11 and the second external electrode 12.
  • the first dielectric film 31 constituting the first metallized film 21 and the second dielectric film 32 constituting the second metallized film 22 each contain a curable resin as a main component.
  • the principal component means a component having the largest weight percentage, and preferably means a component having a weight percentage larger than 50% by weight.
  • the curable resin may be a thermosetting resin or a photocurable resin.
  • the thermosetting resin means a resin that can be cured by heat, and does not limit the curing method. Therefore, as long as the resin can be cured by heat, the thermosetting resin also includes a resin cured by a method other than heat (for example, light, electron beam, etc.). Further, depending on the material, the reaction may be started due to the reactivity of the material itself, and a thermosetting resin is also used if the material is cured without necessarily applying heat or light from the outside. The same applies to the photocurable resin, and the curing method is not limited as long as the resin can be cured by light.
  • the curable resin may have at least one of urethane bond and urea bond, and may not have both urethane bond and urea bond.
  • the presence of urethane bond and / or urea bond can be confirmed by using a Fourier transform infrared spectrophotometer (FT-IR).
  • FT-IR Fourier transform infrared spectrophotometer
  • the curable resin is preferably composed of a cured product of the first organic material and the second organic material.
  • a cured product include a cured product obtained by reacting a hydroxyl group (OH group) contained in the first organic material with an isocyanate group (NCO group) contained in the second organic material.
  • NCO group isocyanate group
  • the first dielectric film 31 and the second dielectric film 32 may each contain one of a hydroxyl group and an isocyanate group, or may contain both a hydroxyl group and an isocyanate group. ..
  • the presence of hydroxyl groups and / or isocyanate groups can be confirmed using a Fourier transform infrared spectrophotometer (FT-IR).
  • FT-IR Fourier transform infrared spectrophotometer
  • the first organic material is preferably a polyol having a plurality of hydroxyl groups in the molecule.
  • the polyol include polyvinyl acetal such as polyvinyl acetal acetal, polyether polyol such as phenoxy resin, polyester polyol and the like.
  • the first organic material a plurality of types of organic materials may be used in combination.
  • the second organic material is preferably an isocyanate compound, an epoxy resin, or a melamine resin having a plurality of functional groups in the molecule.
  • a plurality of types of organic materials may be used in combination.
  • isocyanate compound examples include aromatic polyisocyanates such as diphenylmethane diisocyanate (MDI) and tolylene diisocyanate (TDI), and aliphatic polyisocyanates such as hexamethylene diisocyanate (HDI).
  • aromatic polyisocyanates such as diphenylmethane diisocyanate (MDI) and tolylene diisocyanate (TDI)
  • aliphatic polyisocyanates such as hexamethylene diisocyanate (HDI).
  • the isocyanate compound may be a modified product of these polyisocyanates, for example, a modified product having carbodiimide, urethane, or the like.
  • the epoxy resin is not particularly limited as long as it has an epoxy ring, and examples thereof include a bisphenol A type epoxy resin, a biphenyl skeleton epoxy resin, a cyclopentadiene skeleton epoxy resin, and a naphthalene skeleton epoxy resin.
  • the melamine resin is not particularly limited as long as it is an organic nitrogen compound having a triazine ring at the center of the structure and three amino groups around it, and examples thereof include alkylated melamine resins.
  • the melamine resin may be a modified form of melamine.
  • the first dielectric film 31 and the second dielectric film 32 are preferably formed by forming a resin solution containing the first organic material and the second organic material into a film, and then heat-treating and curing the resin solution. It is made.
  • the first dielectric film 31 and the second dielectric film 32 may each contain a vapor-deposited polymer film as a main component.
  • the vapor-deposited polymerized film may have at least one of a urethane bond and a urea bond, or may not have both a urethane bond and a urea bond.
  • the thin-film deposition polymer film refers to a film formed by a thin-film deposition polymerization method, and is basically included in a curable resin.
  • the first dielectric film 31 and the second dielectric film 32 may each contain a thermoplastic resin as a main component.
  • thermoplastic resin examples include polypropylene, polyether sulfone, polyetherimide, polyarylate and the like.
  • Each of the first dielectric film 31 and the second dielectric film 32 has uncured portions of starting materials such as silicone resin, first organic material and second organic material as components other than the main components. Etc. may be contained.
  • the first dielectric film 31 and the second dielectric film 32 may each contain additives for adding various functions.
  • the additive include a leveling agent for imparting smoothness.
  • the additive preferably has a functional group that reacts with a hydroxyl group and / or an isocyanate group, and forms a part of the crosslinked structure of the cured product.
  • examples of such an additive include a resin having at least one functional group selected from the group consisting of a hydroxyl group, an epoxy group, a silanol group, and a carboxyl group.
  • compositions of the first dielectric film 31 and the second dielectric film 32 may be different from each other, but are preferably the same.
  • the thickness of the first dielectric film 31 and the second dielectric film 32 is preferably 0.5 ⁇ m or more and 5 ⁇ m or less, respectively.
  • the thicknesses of the first dielectric film 31 and the second dielectric film 32 may be different from each other, but are preferably the same.
  • the thickness of the first dielectric film 31 and the second dielectric film 32 can be measured using an optical film thickness meter.
  • the constituent materials of the first metal layer 41 constituting the first metallized film 21 and the second metal layer 42 constituting the second metallized film 22, are, for example, aluminum, zinc, and titanium, respectively. , Magnesium, tin, nickel and other metals.
  • compositions of the first metal layer 41 and the second metal layer 42 may be different from each other, but are preferably the same.
  • the thicknesses of the first metal layer 41 and the second metal layer 42 are preferably 5 nm or more and 40 nm or less, respectively.
  • the thickness of the first metal layer 41 can be specified by observing the cut surface of the first metallized film 21 in the thickness direction using a transmission electron microscope (TEM).
  • the thickness of the second metal layer 42 can be specified in the same manner.
  • the constituent material of the first-winding film 23 is not particularly limited as long as it can easily wind the first metallized film 21 and the second metallized film 22, and for example, polypropylene, polyethylene terephthalate, polyphenylene sulfide, and polyethylene na. Examples include phthalate.
  • the first-winding film 23 may be composed of an independent film separate from the first dielectric film 31 or the second dielectric film 32, or may be composed of a continuous series of films. When composed of a series of continuous films, the electrode may not be provided at the portion corresponding to the first-winding film 23.
  • the constituent material of the protective roll film 24 is not particularly limited as long as it can protect the first metallized film 21 and the second metallized film 22, and for example, polypropylene, polyethylene terephthalate, polyphenylene sulfide, and polyethylene naphthalate. And so on.
  • the protective roll film 24 may be composed of an independent film separate from the first dielectric film 31 or the second dielectric film 32, or may be composed of a continuous series of films. When composed of a series of continuous films, the electrode may not be provided at the portion corresponding to the protective roll film 24.
  • the configuration of the laminated body 10 may be different from the configuration shown in FIGS. 3A and 3B.
  • the first metal layer 41 is divided into two metal layers in the width direction, one metal layer reaches one side edge of the first metallized film 21, and the other.
  • the metal layer is provided so as to reach the other side edge of the first metallized film 21, and in the second metallized film 22, the second metal layer 42 does not reach one side edge and the other side. It may be provided so as not to reach the edge.
  • the first metal layer 41 one metal layer is connected to the first external electrode 11, and the other metal layer is connected to the second external electrode 12, while the second metal layer is connected. Even when the 42 is provided so as not to be connected to both the first external electrode 11 and the second external electrode 12, a capacitor can be formed between the first metal layer 41 and the second metal layer 42.
  • the film capacitor of the present invention is manufactured by, for example, the following method.
  • a first metallized film 21 and a second metallized film 22 are produced.
  • the first metallized film 21 and the second metallized film 22 are wound around the first wound film 23 in a roll shape.
  • the protective winding film 24 is wound a plurality of times around the outer peripheral surface of the winding end portion.
  • the first external electrode 11 is formed so as to be connected to the first metal layer 41 by spraying a metal onto one end surface of the laminated body 10. Further, the second external electrode 12 is formed so as to be connected to the second metal layer 42 by spraying metal on the other end face of the laminated body 10.
  • FIG. 7 is a perspective view schematically showing an example of a method of forming an external electrode.
  • the flat surface of the laminated body 10 is sandwiched between the thermal spraying jigs 61 and 62 so that the end face of the laminated body 10 is opened.
  • the thermal spraying jigs 61 and 62 are not in contact with the corner surfaces of the laminated body 10.
  • molten metal is injected from the thermal spray nozzle 63 onto the end face of the laminated body 10.
  • FIG. 8 is a cross-sectional view schematically showing an example of a method of forming a step on the first external electrode.
  • FIG. 9 is a cross-sectional view schematically showing an example of a method of forming a metal portion connected to the first external electrode 11.
  • the molten metal may be injected only to the outside of the laminated body with the thermal spray nozzle 63 separated from the laminated body 10 as compared with the state shown in FIG.
  • the metal portion 14 having a density lower than that of the first external electrode 11 can be formed on the step 13.
  • the method of forming the metal portion 14 is not limited to the method shown in FIG.
  • the step 13 and the metal portion 14 can be formed by the same method as described above.
  • the film capacitor 1 shown in FIG. 1 is manufactured.
  • the film capacitor of the present invention is not limited to the above embodiment, and various applications and modifications can be added within the scope of the present invention regarding the configuration of the film capacitor, manufacturing conditions, and the like.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
PCT/JP2020/017756 2019-08-28 2020-04-24 フィルムコンデンサ WO2021038963A1 (ja)

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JP2021541997A JP7312261B2 (ja) 2019-08-28 2020-04-24 フィルムコンデンサ
CN202090000813.XU CN217507111U (zh) 2019-08-28 2020-04-24 薄膜电容器

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JP2019155996 2019-08-28
JP2019-155996 2019-08-28

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WO2021038963A1 true WO2021038963A1 (ja) 2021-03-04

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CN (1) CN217507111U (enrdf_load_stackoverflow)
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Citations (4)

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JPS5749217A (en) * 1980-09-09 1982-03-23 Matsushita Electric Ind Co Ltd Method of producing condenser
JPS5797610A (en) * 1980-12-11 1982-06-17 Matsushita Electric Ind Co Ltd Oil-immersed metallized film capacitor
JP2012222137A (ja) * 2011-04-08 2012-11-12 Nichicon Corp 金属化フィルムコンデンサおよびその製造方法
JP2014183158A (ja) * 2013-03-19 2014-09-29 Nichicon Corp 金属化フィルムコンデンサ

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JPS5749217A (en) * 1980-09-09 1982-03-23 Matsushita Electric Ind Co Ltd Method of producing condenser
JPS5797610A (en) * 1980-12-11 1982-06-17 Matsushita Electric Ind Co Ltd Oil-immersed metallized film capacitor
JP2012222137A (ja) * 2011-04-08 2012-11-12 Nichicon Corp 金属化フィルムコンデンサおよびその製造方法
JP2014183158A (ja) * 2013-03-19 2014-09-29 Nichicon Corp 金属化フィルムコンデンサ

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