CN-224203964-U - Laminated ceramic electronic component

CN224203964UCN 224203964 UCN224203964 UCN 224203964UCN-224203964-U

Abstract

Provided is a laminated ceramic electronic component which can provide a laminated ceramic capacitor capable of improving the fixing force between a laminate and a base electrode layer without increasing the ESR in an external electrode. In a laminated ceramic electronic component, a plurality of ceramic layers are laminated, wherein Ca and Zr are used as main components, a first external electrode and a second external electrode are provided with a first base electrode layer and a second base electrode layer, and a plating layer formed to cover a part of the first base electrode layer and the second base electrode layer, the first base electrode layer and the second base electrode layer are provided with a first compound region extending toward a first end face and a second compound region extending toward a second end face at an edge part in a lamination direction of a laminated body, the first compound region is bonded to the first base electrode layer, the second compound region is bonded to the second base electrode layer, and the first compound region and the second compound region are not bonded.

Inventors

See Fang Shanghui
YASUDA Tatsunori

Assignees

株式会社村田制作所

Dates

Publication Date: 20260505
Application Date: 20230815
Priority Date: 20221003

Claims (14)

1. A laminated ceramic electronic component is characterized by comprising: A laminated body including a plurality of ceramic layers including Ca and Zr as main components, the laminated body including first and second main surfaces opposing each other in a lamination direction, first and second side surfaces opposing each other in a width direction orthogonal to the lamination direction, first and second end surfaces opposing each other in a longitudinal direction orthogonal to the lamination direction and the width direction, first internal electrode layers alternately laminated with the plurality of ceramic layers and exposed at the first end surfaces, and second internal electrode layers alternately laminated with the plurality of ceramic layers and exposed at the second end surfaces; A first external electrode disposed to be wound from the first end face to the first main face and the second main face, and A second external electrode provided so as to extend from the second end surface to the first main surface and the second main surface, The first external electrode and the second external electrode have: a first base electrode layer and a second base electrode layer, and A plating layer formed to cover a portion of the first base electrode layer and the second base electrode layer, The first base electrode layer and the second base electrode layer are made of Cu as a main component, In the laminate, the following regions are arranged at the edges in the lamination direction: a first compound region extending toward the first end face, and A second compound region extending toward the second end face, The first compound region is bonded to the first base electrode layer, The second compound region is bonded to the second base electrode layer, The first compound region and the second compound region are not joined.
2. The laminated ceramic electronic component according to claim 1, wherein, The first compound region and the second compound region are not located on the central side in the longitudinal direction of the laminate with respect to the first base electrode layer and the second base electrode layer disposed on the first main surface and the second main surface.
3. The laminated ceramic electronic component according to claim 1 or 2, wherein, The thickness of the first compound region and the thickness of the second compound region in a direction orthogonal to the first base electrode layer and the second base electrode layer are 4 μm to 25 μm.
4. The laminated ceramic electronic component according to claim 1 or 2, wherein, The main component of the first compound region and the second compound region is Cu.
5. The laminated ceramic electronic component according to claim 1 or 2, wherein, The laminate is provided with the following regions at the edges in the width direction: A third compound region extending toward the first end face, and A fourth compound region extending toward the second end face, The third compound region is bonded to the first base electrode layer, The fourth compound region is bonded to the second base electrode layer, The third compound region and the fourth compound region are not joined.
6. The laminated ceramic electronic component according to claim 1 or 2, wherein, The portion of the first internal electrode layer and the second internal electrode layer which face each other in the lamination direction is an electrode facing portion, L-gaps are provided in the longitudinal direction of the laminate between the electrode facing portion and the first end surface and between the electrode facing portion and the second end surface, The length of the L-gap in the longitudinal direction of the laminate is 10% to 30% of the length of the laminate in the longitudinal direction.
7. The laminated ceramic electronic component according to claim 1 or 2, wherein, The laminate has a first dummy electrode layer disposed on the same plane as the first internal electrode layer and exposed at the second end face, The distance in the longitudinal direction of the laminate between the front end on the second end surface side of the first internal electrode layer and the front end on the first end surface side of the first dummy electrode layer is 10% to 30% of the length in the longitudinal direction of the laminate.
8. The laminated ceramic electronic component according to claim 7, wherein, The first dummy electrode layer is disposed on the same plane as the first internal electrode layer closest to any one of the first main surface and the second main surface.
9. The laminated ceramic electronic component according to claim 1 or 2, wherein, The laminate is provided with: A second dummy electrode layer disposed on the same plane as the first internal electrode layer and exposed at the second end face, and A first dummy electrode layer disposed on the same plane as the second internal electrode layer and exposed at the first end surface, The distance in the longitudinal direction of the laminate between the front end on the second end surface side of the first internal electrode layer and the front end on the first end surface side of the second dummy electrode layer is 10% to 30% of the length in the longitudinal direction of the laminate.
10. The laminated ceramic electronic component according to claim 9, wherein, The first dummy electrode layer closest to the first main surface or the second main surface among the first dummy electrode layers is longer in length in the longitudinal direction than other first dummy electrode layers adjacent to the first dummy electrode layer in the stacking direction, The second internal electrode layer disposed on the same plane as the first dummy electrode layer closest to the first main surface or the second main surface has a shorter length in the longitudinal direction than the other second internal electrode layers disposed on the same plane as the other first dummy electrode layers adjacent to the first dummy electrode layer in the stacking direction.
11. The laminated ceramic electronic component according to claim 9, wherein, The second dummy electrode layer closest to the first main surface or the second main surface among the second dummy electrode layers is longer in length in the longitudinal direction than other second dummy electrode layers adjacent to the second dummy electrode layer in the stacking direction, The first internal electrode layer disposed on the same plane as the second dummy electrode layer closest to the first main surface or the second main surface has a shorter length in the longitudinal direction than the other first internal electrode layers disposed on the same plane as the other second dummy electrode layers adjacent to the second dummy electrode layer in the stacking direction.
12. The laminated ceramic electronic component according to claim 1 or 2, wherein, The portion of the first internal electrode layer and the second internal electrode layer which face each other in the lamination direction is an electrode facing portion, W gaps are respectively formed between the electrode facing portions and the first side surfaces and between the electrode facing portions and the second side surfaces in the width direction of the laminated body, The length of the W gap in the width direction of the laminate is 20% to 30% of the length of the laminate in the width direction.
13. The laminated ceramic electronic component according to claim 1 or 2, wherein, The actual boundary line of the first internal electrode layer or the second internal electrode layer is 92% or more and 103% or less of the ideal path length of the corresponding first internal electrode layer or second internal electrode layer.
14. The laminated ceramic electronic component according to claim 1, wherein, The main component is the component most contained in the unit area.

Description

Laminated ceramic electronic component Technical Field The present utility model relates to a laminated ceramic electronic component, and more particularly, to a laminated ceramic capacitor. Background In recent years, along with miniaturization of electronic devices having laminated ceramic electronic components mounted thereon, the size of the electronic components has also been reduced. In addition, when the laminated ceramic electronic component is a laminated ceramic capacitor, there is a problem that the external electrode peels off when a device such as a smart phone on which the laminated ceramic capacitor is mounted falls from a certain level, when deflection from the substrate is transmitted to the laminated ceramic electronic component, or the like. As a countermeasure against this problem, patent document 1 and the like describe that the fixing strength of the laminated chip and the external electrode is improved by providing a glass composition layer between the laminated chip and the external electrode. Prior art literature Patent literature Patent document 1 Japanese patent application laid-open No. 2018-182107 Disclosure of utility model Problems to be solved by the utility model However, when the glass component layer is provided, since glass is insulating, the Equivalent series resistance (ESR: equivalent SERIES RESISTANCE) of the laminated ceramic capacitor increases. Accordingly, an object of the present application is to provide a laminated ceramic electronic component such as a laminated ceramic capacitor, which can improve the fixing force between the laminate and the base electrode layer without increasing the ESR in the external electrode. Technical scheme for solving problems A laminated ceramic electronic component of the present utility model comprises a laminate including a plurality of ceramic layers laminated with Ca and Zr as main components, the laminate including a first main surface and a second main surface facing each other in a lamination direction, a first side surface and a second side surface facing each other in a width direction orthogonal to the lamination direction, a first end surface and a second end surface facing each other in a longitudinal direction orthogonal to the lamination direction and the width direction, a first internal electrode layer alternately laminated with the plurality of ceramic layers and exposed at the first end surface, and a second internal electrode layer alternately laminated with the plurality of ceramic layers and exposed at the second end surface, a first external electrode provided so as to be wound from the first end surface to the first main surface and the second main surface, and a second external electrode provided so as to be wound from the second end surface to the first main surface and the second main surface, the first external electrode and the second external electrode having a first compound layer and a second compound layer laminated with the second end surface and a second compound layer laminated with the second compound layer and a second compound layer formed in a second area, and a first compound layer and a second compound layer formed on the first area and a second compound layer and a second area formed so as to extend in the first area and a second compound layer. Effects of the utility model According to the present utility model, it is possible to provide a laminated ceramic electronic component capable of improving the fixing force between the laminate and the base electrode layer without increasing the ESR in the external electrode. Drawings Fig. 1 is a perspective view of a laminated ceramic electronic component according to an embodiment of the present utility model. Fig. 2 is a sectional view taken along line I-I of fig. 1. Fig. 3 is a sectional view taken along line II-II of fig. 1. Fig. 4 is a sectional view taken along line III-III of fig. 1. Fig. 5 is a diagram corresponding to the I-I line cross-sectional view of fig. 1 illustrating a dummy electrode layer. Fig. 6 is a diagram showing characteristics of the laminated ceramic electronic component. Description of the reference numerals 1. Laminated ceramic electronic component 2. Laminate body 4. Ceramic layer 7. Edge of laminate 8. Compound region 10 Internal electrode layers 11 Opposite electrode portions 12 Lead electrode portion 14 Dummy electrode layer 20 External electrode 21 Base electrode layer 23 Plating layer 24 Inner plating layer 25 Surface plating layer 27 End face external electrode 28 Main surface external electrode 29 Side external electrode 50 Electrode facing portion 51L gap 52W gap 53 Inner layer portion 54 Outer layer portion 61 Major face 62 End face 63 Side surfaces 70 Laminate center position Front end of 71 area 72 Front end of base 73 Front end of inner electrode 74 Dummy electrode layer front end 80-83 End points T stacking direction L length direction W width direction. Detailed Description An example of the embodiment of