JPWO2024257531A5

JPWO2024257531A5 -

Info

Publication number: JPWO2024257531A5
Application number: JP2024564550A
Authority: JP
Filing date: 2024-05-14
Publication date: 2025-05-27
Anticipated expiration: 2044-05-14

Claims

a capacitor section including a first capacitor layer and a second capacitor layer opposed to each other in a thickness direction;
a sealing layer provided so as to cover at least one main surface of the capacitor portion,
each of the first capacitor layer and the second capacitor layer includes an anode plate having a porous portion on at least one main surface of a core portion, a dielectric layer provided on a surface of the porous portion, and a cathode layer provided on a surface of the dielectric layer;
the cathode layer includes a solid electrolyte layer provided on a surface of the dielectric layer, and a conductor layer provided on the surface of the solid electrolyte layer,
the conductive layer in the first capacitor layer facing the second capacitor layer is the same as the conductive layer in the second capacitor layer facing the first capacitor layer;
a first external electrode layer provided on at least one main surface of the sealing layer so as to be electrically connected to the cathode layer of the first capacitor layer and the cathode layer of the second capacitor layer;
a first through-hole conductor provided on at least an inner wall surface of a first through hole penetrating the capacitor portion and the sealing layer in the thickness direction, the first through-hole conductor being electrically connected to the first external electrode layer,
The first through-hole conductor is connected to the conductive layer on an inner wall surface of the first through hole .

The capacitor element according to claim 1 , wherein the first external electrode layer is disposed so as to at least partially overlap the same conductive layer in a plan view in the thickness direction.

The capacitor element according to claim 2, wherein, in a plan view from the thickness direction, the area of the first external electrode layer provided on one of the main surfaces of the sealing layer, which overlaps with the same conductive layer, is 50% or more of the area of the same conductive layer.

a second external electrode layer provided on at least one main surface of the sealing layer so as to be electrically connected to the anode plate of the first capacitor layer and the anode plate of the second capacitor layer;
The capacitor element according to claim 1 , wherein at least one of the first external electrode layer and the second external electrode layer is arranged so as to at least partially overlap the same conductive layer in a plan view from the thickness direction.

5. The capacitor element of claim 4, wherein, when viewed in a plane from the thickness direction, the total area of all of the first external electrode layers and the second external electrode layers provided on either one of the main surfaces of the sealing layer is 50% or more of the area surrounded by the outer peripheral edge of the sealing layer .

a second through-hole conductor provided on at least an inner wall surface of a second through hole penetrating the capacitor portion and the sealing layer in the thickness direction, the second through-hole conductor being electrically connected to the second external electrode layer ,
The capacitor element according to claim 4 , wherein the second through-hole conductor is electrically connected to the anode plate of the first capacitor layer and the anode plate of the second capacitor layer on an inner wall surface of the second through hole.

The capacitor element according to claim 1 , wherein the first capacitor layer and the second capacitor layer have different areas of capacitance portions.