US 10,381,159 B2 · Multilayer ceramic capacitor · patentgrep

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Abstract

A plurality of dielectric layers containing one of CaZrO3 and SrZrO3 and a plurality of internal electrodes containing Ni are alternately disposed in a second direction. The plurality of internal electrodes includes a plurality of first internal electrodes and a plurality of second internal electrodes. Each of first connecting portions of the first internal electrodes includes a first end portion connected to a first terminal electrode. Each of second connecting portions of the second internal electrodes includes a second end portion connected to a second terminal electrode. The first end portions of the first connecting portions adjacent to each other in the second direction are located not to overlap with each other when viewed from the second direction. The second end portions of the second connecting portions adjacent to each other in the second direction are located not to overlap with each other when viewed from the second direction.

Claims26

Dependent claims

A multilayer ceramic capacitor comprising:

an element body having a first end surface and a second end surface that oppose each other in a first direction;
a first terminal electrode disposed on the first end surface of the element body;
and
a second terminal electrode disposed on the second end surface of the element body;
wherein:
the element body includes a plurality of dielectric layers containing one of CaZrO3 and SrZrO3 as a main component and a plurality of internal electrodes containing Ni as a main component, being alternately disposed in a second direction,
the plurality of internal electrodes includes a plurality of first internal electrodes connected to the first terminal electrode and a plurality of second internal electrodes connected to the second terminal electrode,
each of the first internal electrodes includes
a first main electrode portion, and
a first connecting portion configured to connect the first main electrode portion with the first terminal electrode and including a first end portion connected with the first terminal electrode,
each of the second internal electrodes includes
a second main electrode portion, and
a second connecting portion configured to connect the second main electrode portion with the second terminal electrode and including a second end portion connected with the second terminal electrode,
the first end portions of the first connecting portions adjacent to each other in the second direction are located not to overlap with each other when viewed from the second direction,
the second end portions of the second connecting portions adjacent to each other in the second direction are located not to overlap with each other when viewed from the second direction,
a surface roughness of the element body is 3.0 to 6.0 μm,
the element body includes first and second opposing outer surfaces in the second direction, and
the element body is mounted on an electric device such that the first opposing outer surface faces the electric device.

15 more elements

A multilayer ceramic capacitor comprising:

an element body having a first end surface and a second end surface that oppose each other in a first direction, a pair of outer principal surfaces that opposes each other, and a pair of side surfaces that opposes each other;
a first terminal electrode disposed on the first end surface of the element body;
and
a second terminal electrode disposed on the second end surface of the element body,
wherein:
the element body includes a plurality of dielectric layers containing one of CaZrO3 and SrZrO3 as a main component and a plurality of internal electrodes containing Ni as a main component, being alternately disposed in a second direction,
an area of each of the first and second end surfaces is smaller than an area of (1) each of the principal surfaces and (2) each of the side surfaces,
the plurality of internal electrodes includes a plurality of first internal electrodes connected to the first terminal electrode and a plurality of second internal electrodes connected to the second terminal electrode,
each of the first internal electrodes includes
a first main electrode portion along the first direction, and
a first connecting portion configured to directly connect the first main electrode portion with the first terminal electrode and including a first end portion connected with the first terminal electrode,
each of the second internal electrodes includes
a second main electrode portion along the first direction, and
a second connecting portion configured to directly connect the second main electrode portion with the second terminal electrode and including a second end portion connected with the second terminal electrode,
the first end portions of the first connecting portions adjacent to each other in the second direction are located not to overlap with each other when viewed from the second direction,
the second end portions of the second connecting portions adjacent to each other in the second direction are located not to overlap with each other when viewed from the second direction,
a surface roughness of the element body is 3.0 to 6.0 μm, and
the element body is mounted on an electric device such that one of the pair of principal surfaces faces the electric device.

15 more elements

A multilayer ceramic capacitor comprising:

an element body having a first end surface and a second end surface that oppose each other in a first direction;
a first terminal electrode disposed on the first end surface of the element body;
and
a second terminal electrode disposed on the second end surface of the element body;
wherein:
the element body includes a plurality of dielectric layers containing one of CaZrO3 and SrZrO3 as a main component and a plurality of internal electrodes containing Ni as a main component, being alternately disposed in a second direction,
the plurality of internal electrodes includes a plurality of first internal electrodes connected to the first terminal electrode and a plurality of second internal electrodes connected to the second terminal electrode,
each of the first internal electrodes includes
a first main electrode portion, and
a first connecting portion configured to connect the first main electrode portion with the first terminal electrode and including a first end portion connected with the first terminal electrode,
each of the second internal electrodes includes
a second main electrode portion, and
a second connecting portion configured to connect the second main electrode portion with the second terminal electrode and including a second end portion connected with the second terminal electrode,
the first end portions of the first connecting portions adjacent to each other in the second direction are located not to overlap with each other when viewed from the second direction,
the second end portions of the second connecting portions adjacent to each other in the second direction are located not to overlap with each other when viewed from the second direction,
the first connecting portion includes
a first narrow portion connected to the first terminal electrode and having a width narrower than a width of the first main electrode portion, and
a first wide portion (1) located between the first narrow portion and the first main electrode portion, (2) in contact with the first narrow portion and the first main electrode portion, and (3) having a width same as the width of the first main electrode portion,
the second connecting portion includes
a second narrow portion connected to the second terminal electrode and having a width narrower than a width of the second main electrode portion, and
a second wide portion (1) located between the second narrow portion and the second main electrode portion, (2) in contact with the second narrow portion and the second main electrode portion, and (3) having a width same as the width of the second main electrode portion,
when viewed from the second direction, the first wide portion is located between (1) a first region in which the first main electrode portion and the second main electrode portion overlap with each other and (2) the first narrow portion, and
when viewed from the second direction, the second wide portion is located between (1) the first region and (2) the second narrow portion.

20 more elements

A multilayer ceramic capacitor comprising:

an element body having a first end surface and a second end surface that oppose each other in a first direction;
a first terminal electrode disposed on the first end surface of the element body;
and
a second terminal electrode disposed on the second end surface of the element body;
wherein:
the element body includes a plurality of dielectric layers containing one of CaZrO3 and SrZrO3 as a main component and a plurality of internal electrodes containing Ni as a main component, being alternately disposed in a second direction,
the plurality of internal electrodes includes a plurality of first internal electrodes connected to the first terminal electrode and a plurality of second internal electrodes connected to the second terminal electrode,
each of the first internal electrodes includes
a first main electrode portion, and
a first connecting portion configured to connect the first main electrode portion with the first terminal electrode and including a first end portion connected with the first terminal electrode,
each of the second internal electrodes includes
a second main electrode portion, and
a second connecting portion configured to connect the second main electrode portion with the second terminal electrode and including a second end portion connected with the second terminal electrode,
the first end portions of the first connecting portions adjacent to each other in the second direction are located not to overlap with each other when viewed from the second direction,
the second end portions of the second connecting portions adjacent to each other in the second direction are located not to overlap with each other when viewed from the second direction,
the first main electrode portion includes
a third wide portion having a width greater than a width of the first connecting portion, and
a third narrow portion (1) located between the third wide portion and the first connecting portion, (2) in contact with the third wide portion and the first connecting portion, and (3) having a width same as the width of the first connecting portion,
the second main electrode portion includes
a fourth wide portion having a width greater than a width of the second connecting portion and
a fourth narrow portion (1) located between the fourth wide portion and the second connecting portion, (2) in contact with the fourth wide portion and the second connecting portion, and (3) having a width same as the width of the second connecting portion,
the width of the third narrow portion is narrower than the width of the fourth wide portion, and the width of the fourth narrow portion is narrower than the width of the third wide portion,
the third narrow portion overlaps with the fourth wide portion when viewed from the second direction, and
the fourth narrow portion overlaps with the third wide portion when viewed from the second direction.

21 more elements

A multilayer ceramic capacitor comprising:

an element body having a first end surface and a second end surface that oppose each other in a first direction, a pair of principal surfaces that opposes each other, and a pair of side surfaces that opposes each other;
a first terminal electrode disposed on the first end surface of the element body;
and
a second terminal electrode disposed on the second end surface of the element body, wherein:
the element body includes a plurality of dielectric layers containing one of CaZrO3 and SrZrO3 as a main component and a plurality of internal electrodes containing Ni as a main component, being alternately disposed in a second direction,
an area of each of the first and second end surfaces is smaller than an area of (1) each of the principal surfaces and (2) each of the side surfaces,
the plurality of internal electrodes includes a plurality of first internal electrodes connected to the first terminal electrode and a plurality of second internal electrodes connected to the second terminal electrode,
each of the first internal electrodes includes
a first main electrode portion, and
a first connecting portion configured to directly connect the first main electrode portion with the first terminal electrode and including a first end portion connected with the first terminal electrode,
each of the second internal electrodes includes
a second main electrode portion, and
a second connecting portion configured to directly connect the second main electrode portion with the second terminal electrode and including a second end portion connected with the second terminal electrode,
the first end portions of the first connecting portions adjacent to each other in the second direction are located not to overlap with each other when viewed from the second direction,
the second end portions of the second connecting portions adjacent to each other in the second direction are located not to overlap with each other when viewed from the second direction,
the first connecting portion includes
a first narrow portion connected to the first terminal electrode and having a width narrower than a width of the first main electrode portion, and
a first wide portion (1) located between the first narrow portion and the first main electrode portion, (2) in contact with the first narrow portion and the first main electrode portion, and (3) having a width same as the width of the first main electrode portion,
the second connecting portion includes
a second narrow portion connected to the second terminal electrode and having a width narrower than a width of the second main electrode portion, and
a second wide portion (1) located between the second narrow portion and the second main electrode portion, (2) in contact with the second narrow portion and the second main electrode portion, and (3) having a width same as the width of the second main electrode portion,
when viewed from the second direction, the first wide portion is located between (1) a first region in which the first main electrode portion and the second main electrode portion overlap with each other and (2) the first narrow portion, and
when viewed from the second direction, the second wide portion is located between (1) the first region and (2) the second narrow portion.

20 more elements

A multilayer ceramic capacitor comprising:

an element body having a first end surface and a second end surface that oppose each other in a first direction, a pair of principal surfaces that opposes each other, and a pair of side surfaces that opposes each other;
a first terminal electrode disposed on the first end surface of the element body;
and
a second terminal electrode disposed on the second end surface of the element body, wherein:
the element body includes a plurality of dielectric layers containing one of CaZrO3 and SrZrO3 as a main component and a plurality of internal electrodes containing Ni as a main component, being alternately disposed in a second direction,
an area of each of the first and second end surfaces is smaller than an area of (1) each of the principal surfaces and (2) each of the side surfaces,
the plurality of internal electrodes includes a plurality of first internal electrodes connected to the first terminal electrode and a plurality of second internal electrodes connected to the second terminal electrode,
each of the first internal electrodes includes
a first main electrode portion, and
a first connecting portion configured to directly connect the first main electrode portion with the first terminal electrode and including a first end portion connected with the first terminal electrode,
each of the second internal electrodes includes
a second main electrode portion, and
a second connecting portion configured to directly connect the second main electrode portion with the second terminal electrode and including a second end portion connected with the second terminal electrode,
the first end portions of the first connecting portions adjacent to each other in the second direction are located not to overlap with each other when viewed from the second direction,
the second end portions of the second connecting portions adjacent to each other in the second direction are located not to overlap with each other when viewed from the second direction,
the first main electrode portion includes
a third wide portion having a width greater than a width of the first connecting portion, and
a third narrow portion (1) located between the third wide portion and the first connecting portion, (2) in contact with the third wide portion and the first connecting portion, and (3) having a width same as the width of the first connecting portion,
the second main electrode portion includes a fourth wide portion having a width greater than a width of the second connecting portion and
a fourth narrow portion (1) located between the fourth wide portion and the second connecting portion, (2) in contact with the fourth wide portion and the second connecting portion, and (3) having a width same as the width of the second connecting portion,
the width of the third narrow portion is narrower than the width of the fourth wide portion, and the width of the fourth narrow portion is narrower than the width of the third wide portion,
the third narrow portion overlaps with the fourth wide portion when viewed from the second direction, and
the fourth narrow portion overlaps with the third wide portion when viewed from the second direction.

20 more elements

Dependencies are inferred from the claim text.