WO2024019144A1 - コンデンサ素子 - Google Patents

コンデンサ素子 Download PDF

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Publication number
WO2024019144A1
WO2024019144A1 PCT/JP2023/026760 JP2023026760W WO2024019144A1 WO 2024019144 A1 WO2024019144 A1 WO 2024019144A1 JP 2023026760 W JP2023026760 W JP 2023026760W WO 2024019144 A1 WO2024019144 A1 WO 2024019144A1
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WO
WIPO (PCT)
Prior art keywords
conductor
anode
cathode
center
penetration
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2023/026760
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
章友 ▲高▼橋
剛史 古川
▲高▼志 姫田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Murata Manufacturing Co Ltd
Original Assignee
Murata Manufacturing Co Ltd
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.)
Filing date
Publication date
Application filed by Murata Manufacturing Co Ltd filed Critical Murata Manufacturing Co Ltd
Priority to JP2024535154A priority Critical patent/JP7616492B2/ja
Priority to CN202380050595.9A priority patent/CN119563220A/zh
Publication of WO2024019144A1 publication Critical patent/WO2024019144A1/ja
Priority to US18/990,112 priority patent/US20250125098A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
    • H01G9/004—Details
    • H01G9/04—Electrodes or formation of dielectric layers thereon
    • H01G9/048—Electrodes or formation of dielectric layers thereon characterised by their structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
    • H01G9/004—Details
    • H01G9/008—Terminals
    • H01G9/012—Terminals specially adapted for solid capacitors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
    • H01G9/004—Details
    • H01G9/08—Housing; Encapsulation
    • H01G9/10—Sealing, e.g. of lead-in wires
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
    • H01G9/004—Details
    • H01G9/14—Structural combinations or circuits for modifying, or compensating for, electric characteristics of electrolytic capacitors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
    • H01G9/15—Solid electrolytic capacitors

Definitions

  • the present invention relates to a capacitor element.
  • Patent Document 1 discloses a capacitor array including a plurality of solid electrolytic capacitor elements formed by dividing one solid electrolytic capacitor sheet, a sheet-shaped first sealing layer, and a sheet-shaped second sealing layer.
  • the solid electrolytic capacitor sheet includes: an anode plate made of a valve metal; a porous layer provided on at least one main surface of the anode plate; a dielectric layer provided on the surface of the porous layer; and a cathode layer including a solid electrolyte layer provided on the surface of a dielectric layer, and has a first main surface and a second main surface facing each other in the thickness direction.
  • the first main surface side of each of the plurality of solid electrolytic capacitor elements is arranged on the first sealing layer.
  • the second sealing layer is arranged to cover the plurality of solid electrolytic capacitor elements on the first sealing layer from the second main surface side.
  • the solid electrolytic capacitor elements are divided by a slit-shaped sheet removal section.
  • Patent Document 1 it is preferable that a through electrode is provided that penetrates the first sealing layer or the second sealing layer in the thickness direction, and that the anode plate or the cathode layer and the external electrode are connected via the through electrode. It is stated that.
  • FIGS. 22A and 22B of Patent Document 1 describe a structure in which an anode and a cathode are arranged in a staggered pattern, and the anode plate is directly connected to the wall surface of the anode through electrode.
  • the capacitor array described in Patent Document 1 has room for improvement in terms of reducing the equivalent series resistance (ESR) and equivalent series inductance (ESL) of individual capacitor elements included in the capacitor array.
  • ESR equivalent series resistance
  • ESL equivalent series inductance
  • An object of the present invention is to provide a capacitor element that can reduce equivalent series resistance and equivalent series inductance.
  • the capacitor element of the present invention includes: an anode plate having a porous portion on at least one main surface of the core; a dielectric layer provided on the surface of the porous portion; and a dielectric layer provided on the surface of the dielectric layer.
  • a capacitor section including a cathode layer, a through conductor penetrating the dielectric layer and the anode plate in the thickness direction, a sealing layer provided to cover the capacitor section, and a surface of the sealing layer. and an outer insulating layer provided to cover the sealing layer and the conductor wiring layer.
  • the through conductor includes a cathode through conductor electrically connected to the cathode layer, and an anode through conductor electrically connected to the anode plate.
  • the conductor wiring layer is electrically connected to either the cathode through conductor or the anode through conductor.
  • the cathode through conductor includes a first cathode through conductor and a second cathode through conductor.
  • the anode through conductor includes a first anode through conductor. In plan view from the thickness direction of the anode plate, the distance between the centers of the first anode through conductor and the first cathode through conductor is the distance between the centers of the first anode through conductor and the second cathode through conductor. It is equivalent to distance.
  • the first cathode penetrating conductor, the second cathode penetrating conductor, and the first anode penetrating conductor each penetrate the sealing layer and the capacitor section in the thickness direction and are connected to the conductor wiring layer at their ends. It is a direct through conductor.
  • the cathode through conductor further includes at least one fifth cathode through conductor.
  • the fifth cathode through conductor is an indirect through conductor that penetrates the outer insulating layer, the sealing layer, and the capacitor portion in the thickness direction and is connected to the conductor wiring layer on the side surface.
  • the distance between the centers of the fifth cathode through conductor and the first cathode through conductor is the center distance between the fifth cathode through conductor and the second cathode through conductor. It is equivalent to distance.
  • FIG. 1 is a cross-sectional view schematically showing an example of a capacitor element according to a first embodiment of the present invention.
  • 2A is a plan view taken along lines A and A' in FIG. 1.
  • FIG. 2B is a plan view taken along lines B and B' in FIG. 1.
  • FIG. 2C is a plan view taken along lines C and C' in FIG. 1.
  • FIG. 2D is a plan view taken along lines D and D' in FIG. 1.
  • FIG. 2E is a plan view taken along line E in FIG. 1.
  • FIG. FIG. 3 is a plan view schematically showing an example of the arrangement of through conductors forming the capacitor element according to the first embodiment of the present invention.
  • FIG. 3 is a plan view schematically showing an example of the arrangement of through conductors forming the capacitor element according to the first embodiment of the present invention.
  • FIG. 4 is a plan view for explaining the arrangement of cathode through conductors in the arrangement shown in FIG. 3.
  • FIG. 5 is a plan view schematically showing another example of the arrangement of through conductors constituting the capacitor element according to the first embodiment of the present invention.
  • FIG. 6 is a plan view for explaining the arrangement of the anode through conductor in the arrangement shown in FIG. 3.
  • FIG. 7 is a plan view for explaining the arrangement of the anode through conductor in the arrangement shown in FIG.
  • FIG. 8 is a plan view for explaining the anode through conductor existing inside a circle centered on the center of the cathode through conductor in the arrangement shown in FIG. FIG.
  • FIG. 9 is a plan view for explaining the cathode through conductor existing inside a circle centered on the center of the anode through conductor in the arrangement shown in FIG.
  • FIG. 10 is a plan view schematically showing still another example of the arrangement of the through conductors forming the capacitor element according to the first embodiment of the present invention.
  • FIG. 11 is a plan view for explaining the arrangement of the anode penetrating conductor in the arrangement shown in FIG. 10.
  • FIG. 12 is a cross-sectional view schematically showing an example of a capacitor element according to a second embodiment of the present invention.
  • FIG. 13 is a cross-sectional view at a different position from FIG. 12.
  • FIG. 14A is a plan view taken along lines A and A' in FIG. 12.
  • FIG. 14B is a plan view taken along lines B and B' in FIG. 12.
  • FIG. 14C is a plan view taken along lines C and C' in FIG. 12.
  • FIG. 14D is a plan view taken along lines D and D' in FIG. 12.
  • FIG. 14E is a plan view taken along lines E and E' in FIG. 12.
  • FIG. 14F is a plan view taken along lines F and F' in FIG. 12.
  • FIG. 14G is a plan view taken along line G in FIG. 12.
  • FIG. 15A is a plan view schematically showing an example of the arrangement of through conductors that constitute a capacitor element according to a second embodiment of the present invention.
  • FIG. 15B is a plan view showing a state in which the indirect through conductor is removed from FIG. 15A.
  • FIG. 16A is a plan view schematically showing another example of the arrangement of through conductors forming the capacitor element according to the second embodiment of the present invention.
  • FIG. 16B is a plan view showing a state in which the indirect through conductor is removed from FIG. 16A.
  • FIG. 17 is a plan view schematically showing still another example of the arrangement of the through conductors that constitute the capacitor element according to the second embodiment of the present invention.
  • FIG. 18A is a plan view for explaining the arrangement of the anode through conductor in the arrangement shown in FIG. 15A.
  • FIG. 18B is a plan view showing a state in which the indirect through conductor is removed from FIG. 18A.
  • FIG. 19A is a plan view for explaining the arrangement of the anode through conductor in the arrangement shown in FIG. 16A.
  • FIG. 19B is a plan view showing a state in which the indirect through conductor is removed from FIG. 19A.
  • FIG. 20 is a plan view for explaining the arrangement of the anode penetrating conductor in the arrangement shown in FIG. 17.
  • FIG. 21 is a cross-sectional view schematically showing a modification of the outer insulating layer.
  • FIG. 22 is a cross-sectional view schematically showing an example of the position of a capacitor element including a plurality of capacitor parts.
  • the capacitor element of the present invention will be explained. Note that the present invention is not limited to the following configuration, and may be modified as appropriate without changing the gist of the present invention. Furthermore, the present invention also includes a combination of a plurality of individual preferred configurations described below.
  • FIG. 1 is a cross-sectional view schematically showing an example of a capacitor element according to a first embodiment of the present invention.
  • 2A is a plan view taken along lines A and A' in FIG. 1.
  • FIG. 2B is a plan view taken along lines B and B' in FIG. 1.
  • FIG. 2C is a plan view taken along lines C and C' in FIG. 1.
  • FIG. 2D is a plan view taken along lines D and D' in FIG. 1.
  • FIG. 2E is a plan view taken along line E in FIG. 1.
  • FIG. 1 is a cross-sectional view taken along line II in FIG. 2A.
  • the capacitor element 1 shown in FIG. 1 includes a capacitor section 10 and a through conductor 20.
  • the capacitor element 1 further includes a sealing layer 30 and conductor wiring layers 40A and 40B.
  • the capacitor section 10 includes an anode plate 11 having a porous section 11B on at least one main surface of a core section 11A, a dielectric layer 13 provided on the surface of the porous section 11B, and a dielectric layer 13 provided on the surface of the dielectric layer 13. and a cathode layer 12.
  • the capacitor section 10 constitutes an electrolytic capacitor.
  • the anode plate 11 has the porous portions 11B on both main surfaces of the core portion 11A, but the anode plate 11 may have the porous portions 11B on only one of the main surfaces of the core portion 11A. good.
  • the cathode layer 12 includes, for example, a solid electrolyte layer provided on the surface of the dielectric layer 13.
  • the cathode layer 12 further includes a conductor layer provided on the surface of the solid electrolyte layer.
  • the capacitor section 10 constitutes a solid electrolytic capacitor.
  • the through conductor 20 penetrates the dielectric layer 13 and the anode plate 11 in the thickness direction (vertical direction in FIG. 1).
  • the through conductor 20 includes a cathode through conductor 20A electrically connected to the cathode layer 12 and an anode through conductor 20B electrically connected to the anode plate 11.
  • a plurality of cathode penetrating conductors 20A are provided so as to penetrate the sealing layer 30 and the capacitor section 10 in the thickness direction.
  • Each cathode penetrating conductor 20A is connected at its end to a conductor wiring layer 40A provided on the surface of the sealing layer 30.
  • the cathode penetrating conductor 20A is preferably present in the cathode layer 12 when viewed from above in the thickness direction of the anode plate 11.
  • the cathode through conductor 20A may be provided at least on the inner wall surface of the through hole that penetrates the sealing layer 30 and the capacitor section 10 in the thickness direction. That is, the cathode through-hole conductor 20A may be provided only on the inner wall surface of the through-hole, or may be provided throughout the inside of the through-hole.
  • the cathode through conductor 20A is provided only on the inner wall surface of the through hole, the space surrounded by the cathode through conductor 20A in the through hole may be filled with a material containing resin. That is, a resin filling portion 25A may be provided inside the cathode penetrating conductor 20A.
  • an insulating material such as the sealing layer 30 is filled between the through hole passing through the sealing layer 30 and the capacitor section 10 in the thickness direction and the cathode through conductor 20A.
  • a plurality of anode through conductors 20B are provided so as to penetrate the sealing layer 30 and the capacitor section 10 in the thickness direction.
  • Each anode penetrating conductor 20B is connected at its end to a conductor wiring layer 40B provided on the surface of the sealing layer 30.
  • the anode penetrating conductor 20B is preferably present in the cathode layer 12 when viewed from above in the thickness direction of the anode plate 11, as shown in FIG. 2C.
  • the anode through conductor 20B may be provided at least on the inner wall surface of the through hole that penetrates the sealing layer 30 and the capacitor section 10 in the thickness direction. That is, the anode through-hole conductor 20B may be provided only on the inner wall surface of the through-hole, or may be provided throughout the inside of the through-hole.
  • the space surrounded by the anode through conductor 20B in the through hole may be filled with a material containing resin. That is, a resin filling portion 25B may be provided inside the anode penetrating conductor 20B.
  • a through conductor among the through conductors 20 that penetrates the sealing layer 30 and the capacitor section 10 in the thickness direction and is connected to the conductor wiring layer 40A or 40B at its end is referred to as a "direct through conductor”. call. Therefore, the cathode through conductor 20A and the anode through conductor 20B are each direct through conductors.
  • the anode through conductor 20B is preferably electrically connected to the anode plate 11 at the inner wall surface of a through hole that penetrates the sealing layer 30 and the capacitor section 10 in the thickness direction. More specifically, it is preferable that the anode through conductor 20B is electrically connected to the end surface of the anode plate 11 that faces the inner wall surface of the through hole in the planar direction. In this case, an insulating material such as the sealing layer 30 is not filled between the through hole passing through the sealing layer 30 and the capacitor section 10 in the thickness direction and the anode through conductor 20B.
  • the core portion 11A and the porous portion 11B are exposed on the end face of the anode plate 11 that is electrically connected to the anode through conductor 20B.
  • the porous portion 11B is also electrically connected to the anode penetrating conductor 20B.
  • the anode through conductor 20B When viewed from the thickness direction of the anode plate 11, the anode through conductor 20B has an anode over the entire circumference of the through hole that penetrates the sealing layer 30 and the capacitor section 10 in the thickness direction, as shown in FIGS. 2D and 2E. Preferably, it is electrically connected to the plate 11.
  • the anode penetrating conductor 20B may be electrically connected via the anode connection layer, or may be directly connected to the end surface of the anode plate 11.
  • the sealing layer 30 is provided to cover the capacitor section 10.
  • the capacitor section 10 is protected by the sealing layer 30 .
  • the sealing layer 30 is preferably provided on both main surfaces of the capacitor section 10 facing each other in the thickness direction.
  • the conductor wiring layers 40A and 40B are provided on the surface of the sealing layer 30 and are electrically connected to either the cathode through conductor 20A or the anode through conductor 20B.
  • the conductor wiring layer 40A is electrically connected to the cathode penetrating conductor 20A.
  • the conductor wiring layer 40A is provided on the surface of the cathode penetrating conductor 20A, and functions as a connection terminal of the capacitor element 1.
  • the conductor wiring layer 40A is electrically connected to the cathode layer 12 via a via conductor 45 penetrating the sealing layer 30, and is connected to a connection terminal for the cathode layer 12. functions as
  • the conductor wiring layer 40B is electrically connected to the anode penetrating conductor 20B.
  • the conductor wiring layer 40B is provided on the surface of the anode penetrating conductor 20B and functions as a connection terminal of the capacitor element 1.
  • the conductor wiring layer 40B is electrically connected to the anode plate 11 via the anode penetrating conductor 20B, and functions as a connection terminal for the anode plate 11.
  • FIG. 3 is a plan view schematically showing an example of the arrangement of through conductors that constitute the capacitor element according to the first embodiment of the present invention.
  • the plan view shown in FIG. 3 is the same as the plan view shown in FIG. 2E.
  • the through conductors are arranged squarely. In the square arrangement, a through conductor is arranged at each vertex of the square shape. In FIG. 3, cathode through conductors and anode through conductors are alternately arranged from top to bottom, and cathode through conductors and anode through conductors are alternately arranged from left to right.
  • the cathode penetrating conductor includes a first cathode penetrating conductor 20A1 and a second cathode penetrating conductor 20A2, and the anode penetrating conductor includes a first anode penetrating conductor 20B1.
  • the distance between the centers of the first anode through conductor 20B1 and the first cathode through conductor 20A1 is the center distance between the first anode through conductor 20B1 and the second cathode through conductor 20A2. It is equivalent to distance.
  • a plurality of cathode through conductors are electrically connected to one cathode layer, so that a current path is formed in parallel to one capacitor element.
  • the equivalent series resistance and equivalent series inductance can be reduced. Furthermore, by equalizing the distance between the centers of the anode through conductor and the cathode through conductor, it is possible to reduce the impedance difference between the respective current paths. Furthermore, it is also possible to disperse the heat generated by the capacitor element and increase the current capacity.
  • the center of the through conductor means the center of the smallest circle that includes the through conductor when viewed from above in the thickness direction of the anode plate. Therefore, the distance between the centers of the anode through conductor and the cathode through conductor means the length of the line segment connecting the center of the anode through conductor and the center of the cathode through conductor, which is determined by the above method. The same applies to the center-to-center distance between the cathode through-conductor and the cathode through-conductor, and the center-to-center distance between the anode through-conductor and the anode through-conductor.
  • the distances between centers are equivalent does not mean only when the distances between centers are completely equivalent, but when the distances between centers are substantially equivalent, e.g. , is an expression that means that even a difference of several percent is included.
  • the first cathode penetrating conductor 20A1, the second cathode penetrating conductor 20A2, and the first anode penetrating conductor 20B1 each penetrate the sealing layer 30 and the capacitor section 10 in the thickness direction and end with the conductor wiring layer 40A or 40B. This is a direct through conductor connected at the
  • FIG. 4 is a plan view for explaining the arrangement of cathode through conductors in the arrangement shown in FIG. 3.
  • the cathode through conductor further includes at least one third cathode through conductor 20A3.
  • the distance between the centers of the first cathode penetration conductor 20A1 and the second cathode penetration conductor 20A2 is the center distance between the first cathode penetration conductor 20A1 and the third cathode penetration conductor 20A3. It is equivalent to distance.
  • the cathode penetrating conductor includes the third cathode penetrating conductor 20A3, as shown in FIG. It is preferable that the third cathode penetrating conductor 20A3 exists on a straight line obtained by rotating the line segment connecting the center at an angle of 90 degrees or 180 degrees with respect to the center of the first cathode penetrating conductor 20A1. In this case, the line segment connecting the center of the first cathode penetrating conductor 20A1 and the center of the second cathode penetrating conductor 20A2 is rotated by an angle of 90 degrees or 180 degrees with respect to the center of the first cathode penetrating conductor 20A1. It is sufficient that a minimum circle that includes the third cathode penetrating conductor 20A3 in a plan view from the thickness direction of the anode plate 11 exists on the straight line.
  • the third cathode through conductor 20A3 is a direct through conductor that penetrates the sealing layer 30 and the capacitor portion 10 in the thickness direction and is connected to the conductor wiring layer 40A at the end.
  • the cathode penetrating conductor further includes at least one fourth cathode penetrating conductor 20A4.
  • the distance between the centers of the second cathode penetration conductor 20A2 and the first cathode penetration conductor 20A1 is the center distance between the second cathode penetration conductor 20A2 and the fourth cathode penetration conductor 20A4. It is equivalent to distance.
  • the cathode penetrating conductor includes the fourth cathode penetrating conductor 20A4, a line segment connecting the center of the first cathode penetrating conductor 20A1 and the center of the second cathode penetrating conductor 20A2 in plan view from the thickness direction of the anode plate 11 is It is preferable that the fourth cathode penetrating conductor 20A4 exists on a straight line rotated at an angle of 90 degrees or 180 degrees with respect to the center of the second cathode penetrating conductor 20A2.
  • the line segment connecting the center of the first cathode penetration conductor 20A1 and the center of the second cathode penetration conductor 20A2 is rotated at an angle of 90 degrees or 180 degrees with respect to the center of the second cathode penetration conductor 20A2. It is sufficient that a minimum circle that includes the fourth cathode penetrating conductor 20A4 in a plan view from the thickness direction of the anode plate 11 exists on the straight line.
  • the fourth cathode through conductor 20A4 is a direct through conductor that penetrates the sealing layer 30 and the capacitor portion 10 in the thickness direction and is connected to the conductor wiring layer 40A at the end.
  • FIG. 5 is a plan view schematically showing another example of the arrangement of through conductors that constitute the capacitor element according to the first embodiment of the present invention.
  • the through conductors are arranged hexagonally. In the hexagonal arrangement, through conductors are arranged at each vertex of a regular hexagon and at the center of the regular hexagon. In FIG. 5, cathode through conductors and anode through conductors are alternately arranged from the top to the bottom.
  • the cathode penetrating conductor includes a first cathode penetrating conductor 20A1 and a second cathode penetrating conductor 20A2, and the anode penetrating conductor includes a first anode penetrating conductor 20B1.
  • the distance between the centers of the first anode through conductor 20B1 and the first cathode through conductor 20A1 is the center distance between the first anode through conductor 20B1 and the second cathode through conductor 20A2. It is equivalent to distance.
  • the cathode penetrating conductor includes the third cathode penetrating conductor 20A3, as shown in FIG. It is preferable that the third cathode penetrating conductor 20A3 exists on a straight line obtained by rotating the line segment connecting the first cathode penetrating conductor 20A1 at an angle of 60 degrees or 120 degrees with respect to the center of the first cathode penetrating conductor 20A1. In this case, a line segment connecting the center of the first cathode penetration conductor 20A1 and the center of the second cathode penetration conductor 20A2 is rotated by an angle of 60 degrees or 120 degrees with respect to the center of the first cathode penetration conductor 20A1. It is sufficient that a minimum circle that includes the third cathode penetrating conductor 20A3 in a plan view from the thickness direction of the anode plate 11 exists on the straight line.
  • the cathode penetrating conductor includes the fourth cathode penetrating conductor 20A4, a line segment connecting the center of the first cathode penetrating conductor 20A1 and the center of the second cathode penetrating conductor 20A2 in plan view from the thickness direction of the anode plate 11 is It is preferable that the fourth cathode penetrating conductor 20A4 exists on a straight line rotated at an angle of 60 degrees or 120 degrees with respect to the center of the second cathode penetrating conductor 20A2.
  • a line segment connecting the center of the first cathode penetration conductor 20A1 and the center of the second cathode penetration conductor 20A2 is rotated by an angle of 60 degrees or 120 degrees with respect to the center of the second cathode penetration conductor 20A2. It is sufficient that a minimum circle that includes the fourth cathode penetrating conductor 20A4 in a plan view from the thickness direction of the anode plate 11 exists on the straight line.
  • the cathode penetrating conductor includes the third cathode penetrating conductor 20A3, the center of the first cathode penetrating conductor 20A1 and the second cathode penetrating conductor in plan view from the thickness direction of the anode plate 11.
  • the third cathode penetrating conductor 20A3 is placed on a straight line obtained by rotating the line segment connecting the center of the conductor 20A2 at an angle of 60 degrees, 90 degrees, 120 degrees, or 180 degrees with respect to the center of the first cathode penetrating conductor 20A1.
  • the cathode through conductor includes the fourth cathode through conductor 20A4, a line connecting the center of the first cathode through conductor 20A1 and the center of the second cathode through conductor 20A2 in plan view from the thickness direction of the anode plate 11. It is preferable that the fourth cathode penetrating conductor 20A4 exists on a straight line rotated by 60 degrees, 90 degrees, 120 degrees, or 180 degrees with respect to the center of the second cathode penetrating conductor 20A2.
  • FIG. 6 is a plan view for explaining the arrangement of the anode penetrating conductor in the arrangement shown in FIG. 3.
  • the anode through conductor further includes a second anode through conductor 20B2.
  • the distance between the centers of the first cathode penetration conductor 20A1 and the first anode penetration conductor 20B1 is the center distance between the first cathode penetration conductor 20A1 and the second anode penetration conductor 20B2. It is equivalent to distance.
  • the second anode through conductor 20B2 is a direct through conductor that penetrates the sealing layer 30 and the capacitor portion 10 in the thickness direction and is connected to the conductor wiring layer 40B at the end.
  • the anode through conductor further includes at least one third anode through conductor 20B3.
  • the distance between the centers of the first anode penetration conductor 20B1 and the second anode penetration conductor 20B2 is the center distance between the first anode penetration conductor 20B1 and the third anode penetration conductor 20B3. It is equivalent to distance.
  • the anode penetration conductor includes the third anode penetration conductor 20B3, as shown in FIG. It is preferable that the third anode penetration conductor 20B3 exists on a straight line obtained by rotating the line segment connecting the center at an angle of 90 degrees or 180 degrees with respect to the center of the first anode penetration conductor 20B1. In this case, the line segment connecting the center of the first anode penetration conductor 20B1 and the center of the second anode penetration conductor 20B2 is rotated by an angle of 90 degrees or 180 degrees with respect to the center of the first anode penetration conductor 20B1. It is sufficient that a minimum circle that includes the third anode penetrating conductor 20B3 in a plan view from the thickness direction of the anode plate 11 exists on the straight line.
  • the third anode through conductor 20B3 is a direct through conductor that penetrates the sealing layer 30 and the capacitor portion 10 in the thickness direction and is connected to the conductor wiring layer 40B at the end.
  • the anode through conductor further includes at least one fourth anode through conductor 20B4.
  • the distance between the centers of the second anode penetration conductor 20B2 and the first anode penetration conductor 20B1 is the center distance between the second anode penetration conductor 20B2 and the fourth anode penetration conductor 20B4. It is equivalent to distance.
  • the anode through conductor includes the fourth anode through conductor 20B4
  • a line segment connecting the center of the first anode through conductor 20B1 and the center of the second anode through conductor 20B2 in plan view from the thickness direction of the anode plate 11 is It is preferable that the fourth anode through conductor 20B4 exists on a straight line rotated at an angle of 90 degrees or 180 degrees with respect to the center of the second anode through conductor 20B2.
  • the line segment connecting the center of the first anode penetration conductor 20B1 and the center of the second anode penetration conductor 20B2 is rotated at an angle of 90 degrees or 180 degrees with respect to the center of the second anode penetration conductor 20B2. It is sufficient that the minimum circle that includes the fourth anode through conductor 20B4 in a plan view from the thickness direction of the anode plate 11 exists on the straight line.
  • the fourth anode through conductor 20B4 is a direct through conductor that penetrates the sealing layer 30 and the capacitor portion 10 in the thickness direction and is connected to the conductor wiring layer 40B at the end.
  • FIG. 7 is a plan view for explaining the arrangement of the anode penetrating conductor in the arrangement shown in FIG. 5.
  • the anode through conductor further includes a second anode through conductor 20B2.
  • the anode penetration conductor includes the third anode penetration conductor 20B3, as shown in FIG. It is preferable that the third anode through conductor 20B3 exists on a straight line obtained by rotating the line segment connecting the center at an angle of 60 degrees or 120 degrees with respect to the center of the first anode through conductor 20B1. In this case, the line segment connecting the center of the first anode penetration conductor 20B1 and the center of the second anode penetration conductor 20B2 is rotated by an angle of 60 degrees or 120 degrees with respect to the center of the first anode penetration conductor 20B1. It is sufficient that a minimum circle that includes the third anode penetrating conductor 20B3 in a plan view from the thickness direction of the anode plate 11 exists on the straight line.
  • the anode through conductor includes the fourth anode through conductor 20B4, a line segment connecting the center of the first anode through conductor 20B1 and the center of the second anode through conductor 20B2 in plan view from the thickness direction of the anode plate 11 is It is preferable that the fourth anode through conductor 20B4 exists on a straight line rotated at an angle of 60 degrees or 120 degrees with respect to the center of the second anode through conductor 20B2. In this case, the line segment connecting the center of the first anode penetration conductor 20B1 and the center of the second anode penetration conductor 20B2 is rotated at an angle of 60 degrees or 120 degrees with respect to the center of the second anode penetration conductor 20B2. It is sufficient that the minimum circle that includes the fourth anode through conductor 20B4 in a plan view from the thickness direction of the anode plate 11 exists on the straight line.
  • the anode penetration conductor includes the third anode penetration conductor 20B3, in a plan view from the thickness direction of the anode plate 11, the center of the first anode penetration conductor 20B1 and the second anode penetration conductor
  • the third anode penetration conductor 20B3 is on a straight line obtained by rotating the line segment connecting the center of the conductor 20B2 at an angle of 60 degrees, 90 degrees, 120 degrees, or 180 degrees with respect to the center of the first anode penetration conductor 20B1.
  • the anode through conductor includes the fourth anode through conductor 20B4, a line connecting the center of the first anode through conductor 20B1 and the center of the second anode through conductor 20B2 in plan view from the thickness direction of the anode plate 11. It is preferable that the fourth anode through conductor 20B4 exists on a straight line rotated by 60 degrees, 90 degrees, 120 degrees, or 180 degrees with respect to the center of the second anode through conductor 20B2.
  • FIG. 8 is a plan view for explaining the anode through conductor existing inside a circle centered on the center of the cathode through conductor in the arrangement shown in FIG. 4.
  • the distance between the centers of the first cathode penetrating conductor 20A1 and the second cathode penetrating conductor 20A2 is the radius
  • the center of the first cathode penetrating conductor 20A1 is the radius.
  • the radius is the number of anode through conductors 20B existing inside the center circle and the distance between the centers of the first cathode through conductor 20A1 and the second cathode through conductor 20A2, and the center is the center of the second cathode through conductor 20A2. It is preferable that the number of anode penetrating conductors 20B existing inside the circle is the same. In the example shown in FIG. 8, there are four anode through conductors 20B inside each circle.
  • the noise removal effect can be enhanced by arranging capacitors evenly and in parallel on the evenly arranged current paths.
  • a circle whose radius is the distance between the centers of the first cathode through conductor 20A1 and the second cathode through conductor 20A2 and whose center is the center of the first cathode through conductor 20A1. It exists inside a circle centered on the center of the second cathode penetration conductor 20A2, with the radius being the total area of the overlapping anode penetration conductors 20B and the center-to-center distance between the first cathode penetration conductor 20A1 and the second cathode penetration conductor 20A2. It is preferable that the difference from the total area of the anode through conductor 20B is within ⁇ 5%.
  • FIG. 9 is a plan view for explaining the cathode through conductor that exists inside a circle centered on the center of the anode through conductor in the arrangement shown in FIG. 6.
  • the distance between the centers of the first anode penetration conductor 20B1 and the second anode penetration conductor 20B2 is defined as the radius
  • the center of the first anode penetration conductor 20B1 is defined as the radius.
  • the radius is the number of cathode penetrating conductors 20A existing inside the center circle and the distance between the centers of the first anode penetrating conductor 20B1 and the second anode penetrating conductor 20B2, and the center of the second anode penetrating conductor 20B2 is the center. It is preferable that the number of cathode through conductors 20A existing inside the circle is the same. In the example shown in FIG. 9, there are four cathode through conductors 20A inside each circle.
  • a circle whose radius is the distance between the centers of the first anode penetration conductor 20B1 and the second anode penetration conductor 20B2 and whose center is the center of the first anode penetration conductor 20B1. It exists inside a circle centered on the center of the second anode penetration conductor 20B2, with the radius being the total area of the overlapping cathode penetration conductors 20A and the center-to-center distance between the first anode penetration conductor 20B1 and the second anode penetration conductor 20B2. It is preferable that the difference from the total area of the cathode through conductor 20A is within ⁇ 5%.
  • FIG. 10 is a plan view schematically showing still another example of the arrangement of the through conductors that constitute the capacitor element according to the first embodiment of the present invention.
  • the through conductors are arranged hexagonally.
  • two cathode through conductors and two anode through conductors are alternately arranged from the top to the bottom.
  • the cathode penetrating conductor includes a third cathode penetrating conductor 20A3 and a fourth cathode penetrating conductor 20A4, there are two third cathode penetrating conductors 20A3 and two fourth cathode penetrating conductors 20A4, respectively. It is preferable that there be at least one of them. In this case, the effect of reducing the equivalent series resistance and equivalent series inductance, and the effect of reducing the impedance difference between the current paths can be enhanced. Furthermore, the effect of increasing current capacity by dispersing the heat generated by the capacitor element can be enhanced.
  • FIG. 11 is a plan view for explaining the arrangement of the anode through conductor in the arrangement shown in FIG. 10.
  • each of the third anode penetration conductor 20B3 and the fourth anode penetration conductor 20B4 is It is preferable that there be at least one of them.
  • the planar shape of the capacitor element 1 when viewed from the thickness direction includes, for example, a rectangle (square or rectangle), a square other than a rectangle, a polygon such as a triangle, a pentagon, a hexagon, a circle, an ellipse, or a combination thereof. Examples include shapes such as Further, the planar shape of the capacitor element 1 may be an L-shape, a C-shape (U-shape), a step-shape, or the like.
  • the anode plate 11 is preferably made of a valve metal that exhibits a so-called valve action.
  • valve metals include simple metals such as aluminum, tantalum, niobium, titanium, and zirconium, and alloys containing at least one of these metals. Among these, aluminum or aluminum alloy is preferred.
  • the shape of the anode plate 11 is preferably flat, and more preferably foil-like.
  • plate-like also includes “foil-like”.
  • the anode plate 11 only needs to have a porous portion 11B on at least one main surface of the core portion 11A. That is, the anode plate 11 may have the porous portion 11B only on one main surface of the core portion 11A, or may have the porous portion 11B on both main surfaces of the core portion 11A.
  • the porous portion 11B is preferably a porous layer formed on the surface of the core portion 11A, and more preferably an etching layer.
  • the thickness of the anode plate 11 before etching treatment is preferably 60 ⁇ m or more and 200 ⁇ m or less.
  • the thickness of the core portion 11A that is not etched after the etching process is preferably 15 ⁇ m or more and 70 ⁇ m or less.
  • the thickness of the porous portion 11B is designed according to the required withstand voltage and capacitance, but it is preferable that the total thickness of the porous portions 11B on both sides of the core portion 11A is 10 ⁇ m or more and 180 ⁇ m or less.
  • the pore diameter of the porous portion 11B is preferably 10 nm or more and 600 nm or less. Note that the pore diameter of the porous portion 11B means the median diameter D50 measured by a mercury porosimeter. The pore diameter of the porous portion 11B can be controlled, for example, by adjusting various etching conditions.
  • the dielectric layer 13 provided on the surface of the porous portion 11B is porous reflecting the surface condition of the porous portion 11B, and has a finely uneven surface shape.
  • the dielectric layer 13 is preferably made of an oxide film of the valve metal.
  • the surface of the aluminum foil is anodized (also referred to as chemical conversion treatment) in an aqueous solution containing ammonium adipate, etc. to form a dielectric layer made of an oxide film. 13 can be formed.
  • the thickness of the dielectric layer 13 is designed according to the required withstand voltage and capacitance, but is preferably 10 nm or more and 100 nm or less.
  • the cathode layer 12 includes a solid electrolyte layer
  • examples of the material constituting the solid electrolyte layer include conductive polymers such as polypyrroles, polythiophenes, and polyanilines. Among these, polythiophenes are preferred, and poly(3,4-ethylenedioxythiophene) called PEDOT is particularly preferred.
  • the conductive polymer may contain a dopant such as polystyrene sulfonic acid (PSS).
  • PSS polystyrene sulfonic acid
  • the solid electrolyte layer preferably includes an inner layer that fills the pores (recesses) of the dielectric layer 13 and an outer layer that covers the dielectric layer 13.
  • the thickness of the solid electrolyte layer from the surface of the porous portion 11B is preferably 2 ⁇ m or more and 20 ⁇ m or less.
  • the solid electrolyte layer is formed by forming a polymer film such as poly(3,4-ethylenedioxythiophene) on the surface of the dielectric layer 13 using a treatment liquid containing a monomer such as 3,4-ethylenedioxythiophene.
  • the dielectric layer 13 is formed by applying a dispersion of a polymer such as poly(3,4-ethylenedioxythiophene) to the surface of the dielectric layer 13 and drying it.
  • the solid electrolyte layer can be formed in a predetermined area by applying the above treatment liquid or dispersion liquid to the surface of the dielectric layer 13 by a method such as sponge transfer, screen printing, dispenser coating, or inkjet printing. .
  • the conductor layer 12 includes at least one of a conductive resin layer and a metal layer.
  • the conductor layer may be only a conductive resin layer or only a metal layer.
  • the conductor layer preferably covers the entire surface of the solid electrolyte layer.
  • the conductive resin layer examples include a conductive adhesive layer containing at least one conductive filler selected from the group consisting of silver filler, copper filler, nickel filler, and carbon filler.
  • the metal layer examples include metal plating films, metal foils, and the like.
  • the metal layer is preferably made of at least one metal selected from the group consisting of nickel, copper, silver, and alloys containing these metals as main components. Note that the "main component" refers to the elemental component having the largest weight ratio.
  • the conductor layer includes, for example, a carbon layer provided on the surface of the solid electrolyte layer and a copper layer provided on the surface of the carbon layer.
  • the carbon layer is provided to electrically and mechanically connect the solid electrolyte layer and the copper layer.
  • the carbon layer can be formed in a predetermined area by applying carbon paste to the surface of the solid electrolyte layer by a method such as sponge transfer, screen printing, dispenser coating, or inkjet printing. Note that it is preferable to laminate the copper layer in the next step on the carbon layer in a viscous state before drying.
  • the thickness of the carbon layer is preferably 2 ⁇ m or more and 20 ⁇ m or less.
  • the copper layer can be formed in a predetermined area by applying a copper paste to the surface of the carbon layer by a method such as sponge transfer, screen printing, spray coating, dispenser coating, or inkjet printing.
  • the thickness of the copper layer is preferably 2 ⁇ m or more and 20 ⁇ m or less.
  • the cathode through conductor 20A which is a direct through conductor, is formed, for example, as follows. First, by performing processing such as drilling or laser processing, a first through hole passing through the capacitor portion 10 in the thickness direction is formed. Next, the first through hole is filled with an insulating material such as the sealing layer 30. A second through hole is formed by performing processing such as drilling or laser processing on the portion filled with the insulating material. At this time, by making the diameter of the second through hole smaller than the diameter of the first through hole filled with an insulating material, the inner wall surface of the first through hole and the inner wall surface of the second through hole are An insulating material exists between the two.
  • the inner wall surface of the second through hole is metalized with a metal material containing a low resistance metal such as copper, gold, silver, etc., thereby forming the cathode through conductor 20A, which is a direct through conductor.
  • a metal material containing a low resistance metal such as copper, gold, silver, etc.
  • processing is facilitated by, for example, metalizing the inner wall surface of the second through hole by electroless copper plating, electrolytic copper plating, or the like.
  • the method of forming the cathode through-hole conductor 20A other than the method of metalizing the inner wall surface of the second through-hole, there is a method of filling the second through-hole with a metal material, a composite material of metal and resin, etc. Good too.
  • the anode through conductor 20B which is a direct through conductor, is formed, for example, as follows. First, a third through hole that penetrates the sealing layer 30 and the capacitor section 10 in the thickness direction is formed by performing processing such as drilling or laser processing. Then, by metallizing the inner wall surface of the third through hole with a metal material containing a low resistance metal such as copper, gold, silver, etc., an anode through conductor 20B, which is a direct through conductor, is formed. When forming the anode penetrating conductor 20B, processing is facilitated by, for example, metalizing the inner wall surface of the third through hole by electroless copper plating, electrolytic copper plating, or the like.
  • the method of forming the anode through-hole conductor 20B other than the method of metalizing the inner wall surface of the third through-hole, there is a method of filling the third through-hole with a metal material, a composite material of metal and resin, etc. Good too.
  • the material making up the resin filling part 25A may have a larger coefficient of thermal expansion than the material making up the cathode penetrating conductor 20A (for example, copper), or may have a smaller coefficient of thermal expansion. It may be the same, or it may be the same.
  • the material making up the resin filling part 25B may have a larger or smaller coefficient of thermal expansion than the material (e.g. copper) making up the anode through conductor 20B. It may be the same, or it may be the same.
  • the sealing layer 30 is made of an insulating material.
  • the sealing layer 30 is preferably made of insulating resin.
  • Examples of the insulating resin constituting the sealing layer 30 include epoxy resin, phenol resin, and the like.
  • the sealing layer 30 further contains a filler.
  • Examples of the filler included in the sealing layer 30 include inorganic fillers such as silica particles and alumina particles.
  • the sealing layer 30 may be composed of only one layer, or may be composed of two or more layers. When the sealing layer 30 is composed of two or more layers, the materials constituting each layer may be the same or different.
  • the sealing layer 30 is formed to seal the capacitor portion 10 by, for example, a method of thermocompression bonding an insulating resin sheet, a method of applying an insulating resin paste and then thermosetting it, or the like.
  • a layer such as a stress relaxation layer or a moisture-proof film may be provided between the capacitor section 10 and the sealing layer 30.
  • Examples of the constituent material of the conductor wiring layer 40A include metal materials containing low resistance metals such as silver, gold, and copper.
  • the conductor wiring layer 40A is formed, for example, by plating the surface of the cathode penetrating conductor 20A.
  • silver filler is used as a constituent material of the conductor wiring layer 40A.
  • a mixed material of a resin and at least one conductive filler selected from the group consisting of , copper filler, nickel filler, and carbon filler may be used.
  • Examples of the constituent material of the conductor wiring layer 40B include metal materials containing low-resistance metals such as silver, gold, and copper.
  • the conductor wiring layer 40B is formed, for example, by plating the surface of the anode penetrating conductor 20B.
  • silver filler is used as a constituent material of the conductor wiring layer 40B.
  • a mixed material of a resin and at least one conductive filler selected from the group consisting of , copper filler, nickel filler, and carbon filler may be used.
  • the constituent materials of the conductor wiring layers 40A and 40B are preferably the same, at least in terms of type, but may be different from each other.
  • Examples of the constituent material of the via conductor 45 include metal materials containing low-resistance metals such as silver, gold, and copper.
  • the via conductor 45 is formed by, for example, plating the inner wall surface of a through hole that penetrates the sealing layer 30 in the thickness direction with the above-mentioned metal material, or performing heat treatment after filling with a conductive paste. It is formed by
  • the capacitor section 10 may further include an insulating layer provided around the through conductor 20 on at least one main surface of the anode plate 11.
  • the capacitor section 10 may further include an insulating layer provided to surround the cathode layer 12 on at least one main surface of the anode plate 11. By surrounding the cathode layer 12 with an insulating layer, insulation between the anode plate 11 and the cathode layer 12 is ensured, and short circuits between the two are prevented.
  • the insulating layer is made of an insulating material.
  • the insulating layer is preferably made of insulating resin.
  • Examples of the insulating resin constituting the insulating layer include polyphenylsulfone resin, polyethersulfone resin, cyanate ester resin, fluororesin (tetrafluoroethylene, tetrafluoroethylene/perfluoroalkyl vinyl ether copolymer, etc.), and polyimide.
  • Examples include resins, polyamideimide resins, epoxy resins, and derivatives or precursors thereof.
  • the insulating layer may be made of the same resin as the sealing layer 30. Unlike the sealing layer 30, if the insulating layer contains an inorganic filler, it may have an adverse effect on the capacitance effective portion of the capacitor section 10, so it is preferable that the insulating layer is made of a resin alone.
  • the insulating layer is formed in a predetermined area by applying a masking material such as a composition containing an insulating resin to the surface of the porous portion 11B by a method such as sponge transfer, screen printing, dispenser coating, or inkjet printing. can be formed.
  • a masking material such as a composition containing an insulating resin
  • the insulating layer may be formed on the porous portion 11B at a timing before the dielectric layer 13, or may be formed at a timing after the dielectric layer 13.
  • the through conductor further includes an indirect through conductor.
  • FIG. 12 is a cross-sectional view schematically showing an example of a capacitor element according to a second embodiment of the present invention.
  • FIG. 13 is a cross-sectional view at a different position from FIG. 12.
  • FIG. 14A is a plan view taken along lines A and A' in FIG. 12.
  • FIG. 14B is a plan view taken along lines B and B' in FIG. 12.
  • FIG. 14C is a plan view taken along lines C and C' in FIG. 12.
  • FIG. 14D is a plan view taken along lines D and D' in FIG. 12.
  • FIG. 14E is a plan view taken along lines E and E' in FIG. 12.
  • FIG. 14F is a plan view taken along lines F and F' in FIG. 12.
  • FIG. 14G is a plan view taken along line G in FIG. 12. Note that FIG. 12 is a cross-sectional view taken along line II in FIG. 14A, and FIG. 13 is a cross-sectional view taken along line II-II in FIG. 14A.
  • the capacitor element 2 shown in FIGS. 12 and 13 includes a capacitor section 10, a through conductor 20, a sealing layer 30, conductor wiring layers 40A and 40B, and an outer insulating layer 50.
  • the capacitor element 2 further includes conductor wiring layers 40C and 40D.
  • the capacitor section 10 includes an anode plate 11 having a porous section 11B on at least one main surface of a core section 11A, a dielectric layer 13 provided on the surface of the porous section 11B, and a dielectric layer 13 provided on the surface of the dielectric layer 13. and a cathode layer 12.
  • the capacitor section 10 constitutes an electrolytic capacitor.
  • the anode plate 11 has the porous portion 11B on both main surfaces of the core portion 11A, but has the porous portion 11B on only one of the main surfaces of the core portion 11A. You may.
  • the cathode layer 12 includes, for example, a solid electrolyte layer provided on the surface of the dielectric layer 13.
  • the cathode layer 12 further includes a conductor layer provided on the surface of the solid electrolyte layer.
  • the capacitor section 10 constitutes a solid electrolytic capacitor.
  • the through conductor 20 penetrates the dielectric layer 13 and the anode plate 11 in the thickness direction (vertical direction in FIGS. 12 and 13).
  • the through conductor 20 includes cathode through conductors 20A and 20C that are electrically connected to the cathode layer 12 and anode through conductors 20B and 20D that are electrically connected to the anode plate 11.
  • a plurality of cathode through conductors 20A are provided so as to penetrate the sealing layer 30 and the capacitor section 10 in the thickness direction.
  • Each cathode penetrating conductor 20A is connected at its end to a conductor wiring layer 40A provided on the surface of the sealing layer 30.
  • the cathode penetrating conductor 20A is preferably present in the cathode layer 12 when viewed from above in the thickness direction of the anode plate 11.
  • a plurality of anode through conductors 20B are provided so as to penetrate the sealing layer 30 and the capacitor section 10 in the thickness direction.
  • Each anode penetrating conductor 20B is connected at its end to a conductor wiring layer 40B provided on the surface of the sealing layer 30.
  • anode penetrating conductor 20B exists in the cathode layer 12 when viewed from above in the thickness direction of the anode plate 11, as shown in FIG. 14E.
  • the cathode through conductor 20A and the anode through conductor 20B are each direct through conductors.
  • a plurality of cathode through conductors 20C are provided so as to penetrate the outer insulating layer 50, the sealing layer 30, and the capacitor section 10 in the thickness direction.
  • Each cathode penetrating conductor 20C is connected to a conductor wiring layer 40A provided on the surface of the sealing layer 30 at a side surface.
  • each cathode through conductor 20C is connected at its end to a conductor wiring layer 40C provided on the surface of the outer insulating layer 50.
  • the cathode penetrating conductor 20C is preferably present in the cathode layer 12 when viewed from above in the thickness direction of the anode plate 11, as shown in FIG. 14E.
  • the cathode through conductor 20C may be provided at least on the inner wall surface of the through hole that penetrates the outer insulating layer 50, the sealing layer 30, and the capacitor section 10 in the thickness direction. That is, the cathode through-hole conductor 20C may be provided only on the inner wall surface of the through-hole, or may be provided throughout the inside of the through-hole.
  • the cathode through conductor 20C is provided only on the inner wall surface of the through hole, the space surrounded by the cathode through conductor 20C in the through hole may be filled with a material containing resin. That is, a resin filling portion 25C may be provided inside the cathode penetrating conductor 20C.
  • an insulating material such as the sealing layer 30 is filled between the through hole passing through the sealing layer 30 and the capacitor section 10 in the thickness direction and the cathode through conductor 20C.
  • a plurality of anode through conductors 20D are provided so as to penetrate the outer insulating layer 50, the sealing layer 30, and the capacitor section 10 in the thickness direction.
  • Each anode penetrating conductor 20D is connected to a conductor wiring layer 40B provided on the surface of the sealing layer 30 at a side surface. Further, each anode through conductor 20D is connected at its end to a conductor wiring layer 40D provided on the surface of the outer insulating layer 50.
  • anode penetrating conductor 20D exists in the cathode layer 12 when viewed from above in the thickness direction of the anode plate 11, as shown in FIG. 14E.
  • the anode through conductor 20D may be provided at least on the inner wall surface of the through hole that penetrates the outer insulating layer 50, the sealing layer 30, and the capacitor section 10 in the thickness direction. That is, the anode penetrating conductor 20D may be provided only on the inner wall surface of the through hole, or may be provided throughout the inside of the through hole.
  • the space surrounded by the anode through conductor 20D in the through hole may be filled with a material containing resin. That is, a resin filling portion 25D may be provided inside the anode penetrating conductor 20D.
  • an insulating material such as the sealing layer 30 may be filled between the through hole passing through the sealing layer 30 and the capacitor section 10 in the thickness direction and the anode through conductor 20D. preferable.
  • a through conductor of the through conductor 20 that penetrates the outer insulating layer 50, the sealing layer 30, and the capacitor part 10 in the thickness direction and is connected to the conductor wiring layer 40A or 40B on the side is referred to as "indirect”. It is called "through conductor”. Therefore, the cathode through conductor 20C and the anode through conductor 20D are each indirect through conductors. Further, here, the indirect through conductor is not directly connected to the anode plate 11.
  • the sealing layer 30 is provided to cover the capacitor section 10.
  • the capacitor section 10 is protected by the sealing layer 30 .
  • the sealing layer 30 is preferably provided on both main surfaces of the capacitor section 10 facing each other in the thickness direction.
  • the conductor wiring layers 40A and 40B are provided on the surface of the sealing layer 30 and are electrically connected to either the cathode through conductor 20A or the anode through conductor 20B.
  • the conductor wiring layer 40A is electrically connected to the cathode penetrating conductor 20A.
  • the conductor wiring layer 40A is provided on the surface of the cathode penetrating conductor 20A.
  • the conductor wiring layer 40A is electrically connected to the cathode layer 12 via a via conductor 45 that penetrates the sealing layer 30.
  • the conductor wiring layer 40B is electrically connected to the anode penetrating conductor 20B.
  • the conductor wiring layer 40B is provided on the surface of the anode penetrating conductor 20B.
  • the conductor wiring layer 40B is electrically connected to the anode plate 11 via the anode penetrating conductor 20B.
  • the conductor wiring layers 40C and 40D are provided on the surface of the outer insulating layer 50 and are electrically connected to either the cathode through conductor 20C or the anode through conductor 20D.
  • the conductor wiring layer 40C is electrically connected to the cathode penetrating conductor 20C.
  • the conductor wiring layer 40C is provided on the surface of the cathode penetrating conductor 20C.
  • the conductor wiring layer 40C is electrically connected to the cathode layer 12 via the cathode through conductor 20C, the conductor wiring layer 40A, and the via conductor 45.
  • the conductor wiring layer 40D is electrically connected to the anode penetrating conductor 20D.
  • the conductor wiring layer 40D is provided on the surface of the anode penetrating conductor 20D.
  • the conductor wiring layer 40D is electrically connected to the anode plate 11 via the anode through conductor 20D, the conductor wiring layer 40B, and the anode through conductor 20B.
  • FIG. 15A is a plan view schematically showing an example of the arrangement of through conductors forming the capacitor element according to the second embodiment of the present invention.
  • FIG. 15B is a plan view showing a state in which the indirect through conductor is removed from FIG. 15A.
  • the through conductors are arranged squarely.
  • cathode through conductors, which are direct through conductors, and anode through conductors, which are direct through conductors are alternately arranged from the upper side to the lower side.
  • direct through conductors and indirect through conductors are arranged alternately from left to right, cathode through conductors and anode through conductors are alternately arranged, and indirect through conductors are arranged alternately.
  • the cathode through conductors, which are the through conductors, and the anode through conductors, which are the indirect through conductors are arranged alternately from the upper side to the lower side.
  • the cathode penetrating conductor includes a first cathode penetrating conductor 20A1 and a second cathode penetrating conductor 20A2, and the anode penetrating conductor includes a first anode penetrating conductor 20B1.
  • the first cathode penetration conductor 20A1, the second cathode penetration conductor 20A2, and the first anode penetration conductor 20B1 each penetrate the sealing layer 30 and the capacitor section 10 in the thickness direction and connect to the conductor wiring layer 40A or 40B at the end. It is a direct through conductor that is connected.
  • the cathode penetrating conductor may further include at least one third cathode penetrating conductor 20A3.
  • the third cathode through conductor 20A3 is a direct through conductor that penetrates the sealing layer 30 and the capacitor section 10 in the thickness direction and is connected to the conductor wiring layer 40A at an end.
  • the cathode penetrating conductor may further include at least one fourth cathode penetrating conductor 20A4.
  • the fourth cathode through conductor 20A4 is a direct through conductor that penetrates the sealing layer 30 and the capacitor section 10 in the thickness direction and is connected to the conductor wiring layer 40A at an end.
  • the cathode through conductor further includes at least one fifth cathode through conductor 20C5.
  • the fifth cathode through conductor 20C5 is an indirect through conductor that penetrates the outer insulating layer 50, the sealing layer 30, and the capacitor section 10 in the thickness direction and is connected to the conductor wiring layer 40A on the side surface.
  • the distance between the centers of the fifth cathode penetration conductor 20C5 and the first cathode penetration conductor 20A1 is the center distance between the fifth cathode penetration conductor 20C5 and the second cathode penetration conductor 20A2. It is equivalent to distance.
  • the effect described in the first embodiment of the present invention can be further enhanced by increasing the number of current paths due to the indirect through conductor.
  • the metal material of the anode plate and the metal material of the conductor wiring layer are different, it may be difficult to perform plating treatment on both the anode plate and the conductor wiring layer, and it may be difficult to form a through conductor.
  • indirect through conductors that are not directly connected to the anode plate can be formed without plating the anode plate, and are therefore less subject to such restrictions on the formation method. Therefore, by adopting a configuration including an indirect through conductor as in the capacitor element according to the second embodiment of the present invention, it is possible to improve the reliability of conductor connection and the degree of freedom in design.
  • the cathode through conductor preferably further includes at least one sixth cathode through conductor 20C6.
  • the sixth cathode through conductor 20C6 is an indirect through conductor that penetrates the outer insulating layer 50, the sealing layer 30, and the capacitor section 10 in the thickness direction and is connected to the conductor wiring layer 40A on the side surface.
  • the distance between the centers of the first cathode penetration conductor 20A1 and the fifth cathode penetration conductor 20C5 is the center distance between the first cathode penetration conductor 20A1 and the sixth cathode penetration conductor 20C6. It is equivalent to distance.
  • the distance between the centers of the first cathode penetration conductor 20A1 and the second cathode penetration conductor 20A2 is equivalent to the center distance between the fifth cathode penetration conductor 20C5 and the sixth cathode penetration conductor 20C6. be.
  • FIG. 16A is a plan view schematically showing another example of the arrangement of through conductors forming the capacitor element according to the second embodiment of the present invention.
  • FIG. 16B is a plan view showing a state in which the indirect through conductor is removed from FIG. 16A.
  • the through conductors are arranged hexagonally.
  • the cathode feedthrough conductor which is an indirect feedthrough conductor
  • the cathode feedthrough conductor which is an indirect feedthrough conductor
  • the cathode feedthrough conductor which is an indirect feedthrough conductor
  • the cathode feedthrough conductor which is an indirect feedthrough conductor
  • the cathode penetrating conductor is arranged above the anode penetrating conductor
  • an anode penetrating conductor, which is an indirect penetrating conductor is arranged below.
  • FIG. 17 is a plan view schematically showing yet another example of the arrangement of the through conductors that constitute the capacitor element according to the second embodiment of the present invention.
  • the center-to-center distance between the first cathode through conductor 20A1 and the fifth cathode through conductor 20C5 is The center-to-center distance between the first cathode through-conductor 20A1 and the second cathode through-conductor 20A2 is the same as that between the fifth cathode through-conductor 20C5 and the sixth cathode through-conductor 20C6. Different from center distance.
  • FIG. 18A is a plan view for explaining the arrangement of the anode through conductor in the arrangement shown in FIG. 15A.
  • FIG. 18B is a plan view showing a state in which the indirect through conductor is removed from FIG. 18A.
  • the cathode penetration conductor includes a first cathode penetration conductor 20A1 and a second cathode penetration conductor 20A2, and the anode penetration conductor includes a first anode penetration conductor 20B1 and a second anode penetration conductor 20B2.
  • the first cathode penetration conductor 20A1, the second cathode penetration conductor 20A2, the first anode penetration conductor 20B1, and the second anode penetration conductor 20B2 each penetrate the sealing layer 30 and the capacitor section 10 in the thickness direction to form a conductor wiring layer. It is a direct through conductor connected at the end to 40A or 40B.
  • the anode through conductor may further include at least one third anode through conductor 20B3.
  • the third anode through conductor 20B3 is a direct through conductor that penetrates the sealing layer 30 and the capacitor section 10 in the thickness direction and is connected to the conductor wiring layer 40A at an end.
  • the anode penetrating conductor may further include at least one fourth anode penetrating conductor 20B4.
  • the fourth anode through conductor 20B4 is a direct through conductor that penetrates the sealing layer 30 and the capacitor section 10 in the thickness direction and is connected to the conductor wiring layer 40A at an end.
  • the anode through conductor further includes at least one fifth anode through conductor 20D5.
  • the fifth anode through conductor 20D5 is an indirect through conductor that penetrates the outer insulating layer 50, the sealing layer 30, and the capacitor portion 10 in the thickness direction and is connected to the conductor wiring layer 40A on the side surface.
  • the distance between the centers of the fifth anode penetration conductor 20D5 and the first anode penetration conductor 20B1 is the center distance between the fifth anode penetration conductor 20D5 and the second anode penetration conductor 20B2. It is equivalent to distance.
  • the anode through conductor preferably further includes at least one sixth anode through conductor 20D6.
  • the sixth anode through conductor 20D6 is an indirect through conductor that penetrates the outer insulating layer 50, the sealing layer 30, and the capacitor portion 10 in the thickness direction and is connected to the conductor wiring layer 40A on the side surface.
  • the distance between the centers of the first anode penetration conductor 20B1 and the fifth anode penetration conductor 20D5 is equal to the distance between the centers of the first anode penetration conductor 20B1 and the sixth anode penetration conductor 20D6. It is equivalent to distance.
  • the distance between the centers of the first anode penetration conductor 20B1 and the second anode penetration conductor 20B2 is equivalent to the center-to-center distance between the fifth anode penetration conductor 20D5 and the sixth anode penetration conductor 20D6.
  • FIG. 19A is a plan view for explaining the arrangement of the anode through conductor in the arrangement shown in FIG. 16A.
  • FIG. 19B is a plan view showing a state in which the indirect through conductor is removed from FIG. 19A.
  • FIG. 20 is a plan view for explaining the arrangement of the anode through conductor in the arrangement shown in FIG. 17.
  • the center-to-center distance between the first anode penetration conductor 20B1 and the fifth anode penetration conductor 20D5 is as follows:
  • the center-to-center distance between the first anode penetration conductor 20B1 and the second anode penetration conductor 20B2 is the same as the center-to-center distance between the fifth anode penetration conductor 20D5 and the sixth anode penetration conductor 20D6. Different from center distance.
  • the cathode through conductor 20C and the anode through conductor 20D are formed as follows, for example. First, by performing processing such as drilling or laser processing, a fourth through hole that penetrates the outer insulating layer 50, the sealing layer 30, and the capacitor portion 10 in the thickness direction is formed. Then, by metallizing the inner wall surface of the fourth through hole with a metal material containing a low resistance metal such as copper, gold, silver, etc., a cathode through conductor 20C and an anode through conductor 20D, which are indirect through conductors, are formed. .
  • the inner wall surface of the fourth through hole can be metalized by electroless copper plating, electrolytic copper plating, or the like to facilitate processing.
  • the fourth through-hole may be filled with a metal material, a composite material of metal and resin, etc. It may be a method to do so.
  • the material making up the resin filling portion 25C may have a higher or smaller coefficient of thermal expansion than the material (e.g. copper) making up the cathode through conductor 20C. It may be the same, or it may be the same.
  • the material making up the resin filling portion 25D may have a higher coefficient of thermal expansion than the material (e.g. copper) making up the anode through conductor 20D, or may have a smaller coefficient of thermal expansion. It may be the same, or it may be the same.
  • Examples of the constituent material of the conductor wiring layer 40C include metal materials containing low resistance metals such as silver, gold, and copper.
  • the conductor wiring layer 40C is formed, for example, by plating the surface of the cathode penetrating conductor 20C.
  • silver filler is used as a constituent material of the conductor wiring layer 40C.
  • a mixed material of resin and at least one conductive filler selected from the group consisting of , copper filler, nickel filler, and carbon filler may be used.
  • Examples of the constituent material of the conductor wiring layer 40D include metal materials containing low-resistance metals such as silver, gold, and copper.
  • the conductor wiring layer 40D is formed, for example, by plating the surface of the anode penetrating conductor 20D.
  • silver filler is used as a constituent material of the conductor wiring layer 40D.
  • a mixed material of a resin and at least one conductive filler selected from the group consisting of , copper filler, nickel filler, and carbon filler may be used.
  • the constituent materials of the conductor wiring layers 40C and 40D are preferably the same, at least in terms of type, but may be different from each other.
  • the outer insulating layer 50 is made of an insulating material.
  • the outer insulating layer 50 is formed, for example, by arranging the capacitor element 1 shown in FIG. 1 in a cavity provided in advance on the substrate and embedding it with an insulating resin.
  • the outer insulating layer 50 may be formed, for example, by attaching a cured prepreg to the capacitor element 1 shown in FIG. 1 via an adhesive layer.
  • the outer insulating layer 50 may be composed of only one layer, or may be composed of two or more layers. When the outer insulating layer 50 is composed of two or more layers, the materials constituting each layer may be the same or different.
  • the outer insulating layer 50 may be provided only on one side in the thickness direction, or may be provided on both sides.
  • FIG. 21 is a cross-sectional view schematically showing a modification of the outer insulating layer.
  • the thickness of the outer insulating layer 50 provided on each surface may be different.
  • the capacitor element of the present invention is not limited to the above-described embodiments, and various applications and modifications can be made within the scope of the present invention regarding the structure of the capacitor element, the manufacturing conditions of the capacitor element, etc. .
  • the capacitor element of the present invention may include a plurality of capacitor parts.
  • FIG. 22 is a cross-sectional view schematically showing an example of the position of a capacitor element including a plurality of capacitor parts.
  • a plurality of capacitor parts 10 may be stacked in the thickness direction with the outer insulating layer 50 interposed therebetween.
  • the capacitor element of the present invention includes a plurality of capacitor parts
  • the plurality of capacitor parts may be arranged so as to be stacked in the thickness direction, or may be arranged so as to be lined up on a plane, or both may be arranged so as to be stacked in the thickness direction. They may be arranged in combination.
  • the number of capacitor sections is not particularly limited as long as it is two or more.
  • the size, shape, etc. of the capacitor parts may be the same, or may be partially or completely different.
  • the configurations of the capacitor sections are preferably the same, but capacitor sections with different configurations may be included.
  • the capacitor element of the present invention can be suitably used as a constituent material of composite electronic components.
  • a composite electronic component includes, for example, a capacitor element of the present invention and an external electrode provided outside the sealing layer of the capacitor element and electrically connected to each of the anode plate and cathode layer of the capacitor element. (for example, a conductive wiring layer) and an electronic component connected to the external electrode.
  • the electronic component connected to the external electrode may be a passive element or an active element. Both the passive element and the active element may be connected to the external electrode, or either the passive element or the active element may be connected to the external electrode. Also, a composite of a passive element and an active element may be connected to an external electrode.
  • passive elements include inductors and the like.
  • Active elements include memory, GPU (Graphical Processing Unit), CPU (Central Processing Unit), MPU (Micro Processing Unit), and PMIC (Power Matrix). nagement IC), etc.
  • the capacitor element of the present invention has a sheet-like shape as a whole. Therefore, in the composite electronic component, the capacitor element can be treated like a mounting board, and the electronic component can be mounted on the capacitor element. Furthermore, by making the electronic components mounted on the capacitor element sheet-like, the capacitor element and the electronic components can be connected in the thickness direction via through-hole conductors that penetrate each electronic component in the thickness direction. is also possible. As a result, the active element and the passive element can be configured as a single module.
  • a switching regulator can be formed by electrically connecting the capacitor element of the present invention between a voltage regulator including a semiconductor active element and a load to which the converted DC voltage is supplied.
  • a circuit layer may be formed on one side of a capacitor matrix sheet in which a plurality of capacitor elements of the present invention are further laid out, and then connected to a passive element or an active element.
  • the capacitor element of the present invention may be placed in a cavity provided in advance on a substrate, filled with resin, and then a circuit layer may be formed on the resin.
  • Another electronic component passive element or active element
  • the capacitor element of the present invention may be mounted on a smooth carrier such as a wafer or glass, an outer layer made of resin may be formed, a circuit layer may be formed, and the capacitor element may be connected to a passive element or an active element. good.
  • a capacitor comprising: an anode plate having a porous portion on at least one main surface of a core; a dielectric layer provided on the surface of the porous portion; and a cathode layer provided on the surface of the dielectric layer.
  • the through conductor includes a cathode through conductor electrically connected to the cathode layer and an anode through conductor electrically connected to the anode plate
  • the cathode through conductor includes a first cathode through conductor and a second cathode through conductor
  • the anode through conductor includes a first anode through conductor
  • the distance between the centers of the first anode through conductor and the first cathode through conductor is the distance between the centers of the first anode through conductor and the second cathode through conductor.
  • Capacitor element which is equivalent to distance.
  • the cathode penetrating conductor further includes at least one third cathode penetrating conductor, In plan view from the thickness direction of the anode plate, the distance between the centers of the first cathode through conductor and the second cathode through conductor is the center distance between the first cathode through conductor and the third cathode through conductor.
  • the capacitor element according to ⁇ 1> which is equivalent to the distance.
  • ⁇ 3> In a plan view from the thickness direction of the anode plate, a line segment connecting the center of the first cathode through conductor and the center of the second cathode through conductor is 60 mm with respect to the center of the first cathode through conductor.
  • ⁇ 4> In plan view from the thickness direction of the anode plate, a line segment connecting the center of the first cathode through conductor and the center of the second cathode through conductor is 90 mm with respect to the center of the first cathode through conductor.
  • ⁇ 5> In a plan view from the thickness direction of the anode plate, a line segment connecting the center of the first cathode through conductor and the center of the second cathode through conductor is 60 mm with respect to the center of the first cathode through conductor.
  • the anode penetration conductor further includes a second anode penetration conductor, In plan view from the thickness direction of the anode plate, the center-to-center distance between the first cathode through-conductor and the first anode through-conductor is the center-to-center distance between the first cathode through-conductor and the second anode through-conductor.
  • the capacitor element according to any one of ⁇ 1> to ⁇ 5>, which is equivalent to the distance.
  • the anode penetration conductor further includes at least one third anode penetration conductor, In plan view from the thickness direction of the anode plate, the center-to-center distance between the first anode through-conductor and the second anode through-conductor is the center-to-center distance between the first anode through-conductor and the third anode through-conductor.
  • the capacitor element according to ⁇ 6> which is equivalent to the distance.
  • a line segment connecting the center of the first anode penetration conductor and the center of the second anode penetration conductor is 60 mm with respect to the center of the first anode penetration conductor.
  • a line segment connecting the center of the first anode penetration conductor and the center of the second anode penetration conductor is 90 mm with respect to the center of the first anode penetration conductor.
  • a line segment connecting the center of the first anode penetration conductor and the center of the second anode penetration conductor is 60 mm with respect to the center of the first anode penetration conductor.
  • the cathode penetrating conductor further includes at least one fourth cathode penetrating conductor, In plan view from the thickness direction of the anode plate, the center-to-center distance between the second cathode-through conductor and the first cathode-through conductor is the center-to-center distance between the second cathode through-conductor and the fourth cathode through-conductor.
  • the capacitor element according to any one of ⁇ 2> to ⁇ 5>, which is equivalent to the distance.
  • ⁇ 12> In a plan view from the thickness direction of the anode plate, the inside of a circle whose radius is the distance between the centers of the first cathode through conductor and the second cathode through conductor and whose center is the center of the first cathode through conductor. Exists within a circle centered on the center of the second cathode penetrating conductor, whose radius is the number of the anode penetrating conductors present in the area and the center-to-center distance between the first cathode penetrating conductor and the second cathode penetrating conductor.
  • the distance between the centers of the first cathode penetrating conductor and the second cathode penetrating conductor is the radius, and the radius overlaps with a circle centered on the center of the first cathode penetrating conductor.
  • the radius of the anode through-conductor is the total area of the anode through-conductor and the distance between the centers of the first cathode through-conductor and the second cathode through-conductor, and the radius is the center of the second cathode through-conductor.
  • the anode penetration conductor further includes at least one fourth anode penetration conductor, In a plan view from the thickness direction of the anode plate, the center-to-center distance between the second anode penetration conductor and the first anode penetration conductor is the center-to-center distance between the second anode penetration conductor and the fourth anode penetration conductor.
  • the capacitor element according to any one of ⁇ 7> to ⁇ 10>, which is equivalent to the distance.
  • ⁇ 16> In a plan view from the thickness direction of the anode plate, the inside of a circle whose radius is the center-to-center distance between the first anode penetration conductor and the second anode penetration conductor and whose center is the center of the first anode penetration conductor. Exists within a circle centered on the center of the second anode penetration conductor, with the radius being the number of the cathode penetration conductors present in the area and the center-to-center distance between the first anode penetration conductor and the second anode penetration conductor.
  • the distance between the centers of the first anode penetration conductor and the second anode penetration conductor is the radius, and the radius overlaps with a circle centered on the center of the first anode penetration conductor.
  • the radius of the total area of the cathode through-conductor and the center-to-center distance between the first anode through-conductor and the second anode through-conductor exists within a circle centered on the center of the second anode through-conductor.
  • the capacitor element according to ⁇ 16>, wherein the difference from the total area of the cathode through conductors is within ⁇ 5%.
  • a sealing layer provided to cover the capacitor section; further comprising a conductor wiring layer provided on the surface of the sealing layer and electrically connected to either the cathode through conductor or the anode through conductor,
  • the first cathode penetrating conductor, the second cathode penetrating conductor, and the first anode penetrating conductor each penetrate the sealing layer and the capacitor section in the thickness direction and are connected to the conductor wiring layer at their ends.
  • the capacitor element according to any one of ⁇ 1> to ⁇ 18>, which is a direct through conductor.
  • a sealing layer provided to cover the capacitor section; a conductor wiring layer provided on the surface of the sealing layer and electrically connected to either the cathode through conductor or the anode through conductor; further comprising an outer insulating layer provided to cover the sealing layer and the conductor wiring layer,
  • the first cathode penetrating conductor, the second cathode penetrating conductor, and the first anode penetrating conductor each penetrate the sealing layer and the capacitor section in the thickness direction and are connected to the conductor wiring layer at their ends.
  • the cathode penetrating conductor further includes at least one fifth cathode penetrating conductor
  • the fifth cathode feedthrough conductor is an indirect feedthrough conductor that penetrates the outer insulating layer, the sealing layer, and the capacitor portion in the thickness direction and is connected to the conductor wiring layer on the side surface,
  • the distance between the centers of the fifth cathode through conductor and the first cathode through conductor is the center distance between the fifth cathode through conductor and the second cathode through conductor.
  • the capacitor element according to any one of ⁇ 1> to ⁇ 18>, which is equivalent to the distance.
  • the cathode penetrating conductor further includes at least one sixth cathode penetrating conductor,
  • the sixth cathode through conductor is the indirect through conductor, In plan view from the thickness direction of the anode plate, the distance between the centers of the first cathode through conductor and the fifth cathode through conductor is the center distance between the first cathode through conductor and the sixth cathode through conductor. and the center-to-center distance between the first cathode-through conductor and the second cathode-through conductor is different from the center-to-center distance between the fifth cathode through-conductor and the sixth cathode through-conductor, ⁇ 20>.
  • a sealing layer provided to cover the capacitor section; a conductor wiring layer provided on the surface of the sealing layer and electrically connected to either the cathode through conductor or the anode through conductor; further comprising an outer insulating layer provided to cover the sealing layer and the conductor wiring layer,
  • the first cathode penetrating conductor, the second cathode penetrating conductor, the first anode penetrating conductor, and the second anode penetrating conductor each penetrate the sealing layer and the capacitor section in the thickness direction, and the conductor passes through the sealing layer and the capacitor section in the thickness direction.
  • the anode penetration conductor further includes at least one fifth anode penetration conductor,
  • the fifth anode through conductor is an indirect through conductor that penetrates the outer insulating layer, the sealing layer, and the capacitor portion in the thickness direction and is connected to the conductor wiring layer on the side surface,
  • the center-to-center distance between the fifth anode through-conductor and the first anode through-conductor is the center-to-center distance between the fifth anode through-conductor and the second anode through-conductor.
  • the capacitor element according to any one of ⁇ 6> to ⁇ 10> and ⁇ 15> to ⁇ 18>, which is equivalent to the distance.
  • the anode penetration conductor further includes at least one sixth anode penetration conductor,
  • the sixth anode through conductor is the indirect through conductor,
  • the distance between the centers of the first anode penetration conductor and the fifth anode penetration conductor is the center distance between the first anode penetration conductor and the sixth anode penetration conductor.
  • the center-to-center distance between the first anode-through conductor and the second anode-through conductor is different from the center-to-center distance between the fifth anode through-conductor and the sixth anode through-conductor, ⁇ 22>.
  • capacitor element 10 capacitor part 11 anode plate 11A core part 11B porous part 12 cathode layer 13 dielectric layer 20 through conductor 20A, 20C cathode through conductor 20A1 first cathode through conductor 20A2 second cathode through conductor 20A3 Third cathode penetration conductor 20A4 Fourth cathode penetration conductor 20C5 Fifth cathode penetration conductor 20C6 Sixth cathode penetration conductor 20B, 20D Anode penetration conductor 20B1 First anode penetration conductor 20B2 Second anode penetration conductor 20B3 Third anode penetration conductor 20B4 4 Anode penetration conductor 20D5 5th Anode penetration conductor 20D6 6th Anode penetration conductor 25A, 25B, 25C, 25D Resin filling part 30 Sealing layer 40A, 40B, 40C, 40D Conductor wiring layer 45 Via conductor 50 Outer insulation layer

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
PCT/JP2023/026760 2022-07-22 2023-07-21 コンデンサ素子 Ceased WO2024019144A1 (ja)

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Publication number Priority date Publication date Assignee Title
US20250140483A1 (en) * 2023-10-30 2025-05-01 Saras Micro Devices, Inc. Integrated passive devices with enhanced form factor
WO2026048937A1 (ja) * 2024-09-02 2026-03-05 株式会社村田製作所 コンデンサ素子

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JP2004055794A (ja) * 2002-07-19 2004-02-19 Matsushita Electric Ind Co Ltd 固体電解コンデンサ及びその製造方法
JP2006165152A (ja) * 2004-12-06 2006-06-22 Matsushita Electric Ind Co Ltd 固体電解コンデンサ及び固体電解コンデンサ内蔵基板と、それらの製造方法
JP2008098487A (ja) * 2006-10-13 2008-04-24 Matsushita Electric Ind Co Ltd 固体電解コンデンサおよび固体電解コンデンサ内蔵基板と、それらの製造方法
JP2020167361A (ja) * 2019-03-29 2020-10-08 株式会社村田製作所 コンデンサアレイ、及び、複合電子部品

Patent Citations (4)

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Publication number Priority date Publication date Assignee Title
JP2004055794A (ja) * 2002-07-19 2004-02-19 Matsushita Electric Ind Co Ltd 固体電解コンデンサ及びその製造方法
JP2006165152A (ja) * 2004-12-06 2006-06-22 Matsushita Electric Ind Co Ltd 固体電解コンデンサ及び固体電解コンデンサ内蔵基板と、それらの製造方法
JP2008098487A (ja) * 2006-10-13 2008-04-24 Matsushita Electric Ind Co Ltd 固体電解コンデンサおよび固体電解コンデンサ内蔵基板と、それらの製造方法
JP2020167361A (ja) * 2019-03-29 2020-10-08 株式会社村田製作所 コンデンサアレイ、及び、複合電子部品

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20250140483A1 (en) * 2023-10-30 2025-05-01 Saras Micro Devices, Inc. Integrated passive devices with enhanced form factor
WO2026048937A1 (ja) * 2024-09-02 2026-03-05 株式会社村田製作所 コンデンサ素子

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US20250125098A1 (en) 2025-04-17

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