JPH11204370A - Stacked electronic component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress troubles such as distortion in a cross section face, by setting the lead-out parts of inner electrodes to be narrower than inner electrodes, and varying positions of respective lead-out parts in respective width wise directions, which are adjacent to the stacking direction of a stacked body. SOLUTION: Lead-out parts 20 and 21 are narrower than inner electrodes 13 and 14. The positions of the lead-out parts 20 and 21 in respective width wise directions, which are adjacent in the stacking direction of a sacked body 15, are mutually different. The adjacent parts in the stacking direction of the stacked body 15 are positioned so that they are not overlapped one another in the stacking direction of the stacked body 15. When respective areas which the lead-out parts 20 and 21 on end faces 16 and 17 lead out are divided into two areas 22 and 23 through a boundary line extending in the stacking direction of the stacked body 15, one part adjacent to the stacking direction of the stacked body 15 is lead out to the area 22 and the other to the area 23.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated electronic component, and more particularly to a form of a lead-out portion from an internal electrode to an external electrode.

[0002]

2. Description of the Related Art A multilayer ceramic capacitor is an example of a multilayer electronic component that is of interest to the present invention. FIG.
1 shows a conventional multilayer ceramic capacitor 1 in a sectional view. Referring to FIG. 5, a multilayer ceramic capacitor 1 includes a multilayer body 5 including a plurality of stacked ceramic layers 2 and a plurality of internal electrodes 3 and 4 extending along a specific interface between the plurality of ceramic layers 2. Is provided. External electrodes 8 and 9 are provided on opposing first and second end surfaces 6 and 7 of the laminate 5, respectively.

The internal electrodes 3 and 4 are connected to a first external electrode 8
The first internal electrode 3 connected to the first lead portion 10 drawn out to the first end face 6 so as to be connected to the first end face 6, and the second end face 7 connected to the second external electrode 9. Second internal electrode 4 connected to second extraction portion 11 to be extracted
Classified as The first internal electrodes 3 and the second internal electrodes 4 are alternately arranged while overlapping each other in the stacking direction of the stacked body 5.

FIG. 6 shows a first end face 6 of the above-mentioned laminated body 5. As described above, the first end surface 6 shown in the drawing has the first lead portion 1 connected to the first internal electrode 3.
0 is exposed. Although not shown, the second end face 7 includes:
In a similar manner, the second extraction portion 11 connected to the second internal electrode 4 is exposed. When manufacturing such a multilayer ceramic capacitor 1, a plurality of ceramic green sheets to be used as the ceramic layers 2 are prepared, and the internal electrodes 3 and 4 and the lead portions 10 and A conductive film to be 11 is formed by printing, these ceramic green sheets are laminated, and then pressed,
Cutting is performed to obtain a plurality of laminates 5. By this cutting, for example, as shown in FIG.
First and second end faces 6 and 7 of the obtained laminate 5
First and second drawers 10 and 1 respectively
1 comes to appear.

[0005]

However, since the conductive films forming the internal electrodes 3 and 4 and the lead portions 10 and 11 are more brittle than the ceramic green sheets, the end faces 6 and the lead portions 10 or 11 are exposed. 7
Are more susceptible to brittle fracture during cutting than other surfaces. In particular, under the recent trend of multilayer ceramic capacitors with thin-film multilayering, the ceramic green sheets tend to be thinner and the number of stacked layers tends to be larger, so that the ratio occupied by the lead portions 10 or 11 on the end faces 6 and 7 is very large. Is higher. This makes the above-described brittle fracture more likely to occur, and as a result, increases the rate of occurrence of defects such as distortion in the cut surface.

An object of the present invention is to provide a laminated electronic component which can solve the above-mentioned problems.

[0007]

SUMMARY OF THE INVENTION The present invention is directed to a laminated electronic component having the following configuration. That is, the multilayer electronic component according to the present invention includes a multilayer body including a plurality of stacked functional material layers and a plurality of internal electrodes extending along a specific interface between the plurality of functional material layers. A first and a second external electrode provided on the second end face, respectively. The internal electrode is connected to the first external electrode connected to the first external electrode and connected to the first external electrode and the second external electrode so as to be connected to the first external electrode. A second internal electrode connected to a second extraction portion that extends to the second end surface, wherein the first internal electrode and the second internal electrode are alternately arranged while overlapping each other in the stacking direction of the stacked body. Have been.

[0008] In the laminated electronic component having such a configuration,
A feature of the present invention is that the first and second lead-out portions each have a width smaller than the first and second internal electrodes, and the first and second lead-out portions have a stacked body. The positions in the width direction of the components adjacent to each other in the stacking direction are different from each other. In the present invention, it is preferable that, for each of the first and second lead-out portions, those adjacent to each other in the stacking direction of the stacked body are positioned so as not to overlap with each other in the stacking direction of the stacked body. Such a preferred embodiment can be embodied, for example, by the following first or second aspect.

In the first aspect, each area on the first and second end faces from which the first and second lead-out portions are drawn out is connected to the first and second drawers via a boundary line extending in the stacking direction of the stacked body. When divided into the second region, for each of the first and second lead-out portions, one of the adjacent ones in the stacking direction of the laminate is pulled out to the first region, and the other is drawn to the second region. Drawn to.

[0010] In the second aspect, the respective regions on the first and second end faces from which the first and second lead-out portions are drawn out are sequentially placed on the first and second end faces via a boundary line extending in the stacking direction of the stacked body. When divided into the second and third regions, one of the first and second lead-out portions that are adjacent to each other in the stacking direction of the stacked body is drawn to the first and third regions, and the other is also drawn to the second and third regions. , To the second area.

In the present invention, when the functional material layer is made of a dielectric ceramic, a multilayer ceramic capacitor is formed.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described below with reference to a multilayer ceramic capacitor. FIG.
FIG. 3 to FIG. 3 are for explaining a multilayer ceramic capacitor as a multilayer electronic component according to the first embodiment of the present invention. Here, FIG. 1 is a view corresponding to FIG. 6 described above, and shows the first end face 16 of the multilayer body 15 provided in the multilayer ceramic capacitor. FIG.
FIG. 2 is a sectional view taken along line II-II in FIG. 1.

The laminate 15 includes a plurality of stacked ceramic layers 12 and a plurality of internal electrodes 13 and 14 extending along a specific interface between the plurality of ceramic layers 12. Although not shown, the first and second external electrodes 8 and 9 shown in FIG. 5 are provided on the opposed first and second end surfaces 16 and 17 of the laminated body 15. And first and second external electrodes are provided.

The internal electrodes 13 and 14 are connected to a first external electrode (not shown). The internal electrodes 13 and 14 are connected to a first lead portion 20 which is drawn to the first end face 16 and are connected to a second external electrode (not shown). And the second internal electrode 14 connected to the second extraction portion 21 which is extended to the second end face 17 so as to be connected to the external electrode. The first internal electrodes 13 and the second internal electrodes 14 are alternately arranged while overlapping each other in the stacking direction of the stacked body 15.

Although the configuration described so far is substantially the same as that of the conventional multilayer ceramic capacitor 1, this embodiment is characterized by the formation of the lead portions 20 and 21. That is, the first and second drawers 20 and 2
1 has a width narrower than the first and second internal electrodes 13 and 14, respectively. In addition, as can be seen from the state in which the plurality of first extraction portions 20 are illustrated in FIG. 1, each of the first and second extraction portions 20 and 21 that are adjacent to each other in the stacking direction of the stacked body 15 The positions in the width direction are different from each other.

More specifically, in this embodiment, for each of the first and second lead-out portions 20 and 21, those adjacent to each other in the stacking direction of the stacked body 15 They are located so that they do not overlap. In particular, in this embodiment, the first and second
And second drawers 2 on end faces 16 and 17 of
As shown in FIG. 1, when each area from which 0 and 21 are respectively extracted is divided into first and second areas 22 and 23 via a boundary line extending in the stacking direction of the stacked body 15, With respect to each of the second extraction portions 20 and 21, one of the second extraction portions adjacent to each other in the stacking direction of the stacked body 15 is extracted to the first region 22, and the other is similarly extracted to the second region 22.
Area 23.

As described above, according to this embodiment, the first
And the second drawers 20 and 21 occupy the first and second end faces 16 and 17 respectively.
Compared to the conventional case shown in FIG. 6, it can be substantially halved, and the distance between adjacent first and second drawers 20 and 21 can be further increased. . Therefore, the brittleness of the end surfaces 16 and 17 caused by the cutting is less likely to occur due to the brittleness of the internal electrodes 13 and 14 and the lead portions 20 and 21, and the occurrence of problems such as distortion on the cut surface is suppressed. be able to.

FIG. 3 is a plan view showing a ceramic green sheet 24 to be the ceramic layer 12.
The ceramic green sheet 24 is to be cut along a plurality of cutting lines 25 and 26, each of which is indicated by a dashed line and orthogonal to each other, to provide portions to be individual ceramic layers 12. A plurality of conductive films 27 are formed on the ceramic green sheet 24 by, for example, printing. Each conductive film 27 becomes the first and second internal electrodes 13 and 14 and the first and second extraction portions 20 and 21, and is cut along a cutting line 25 crossing the conductive film 27. One side is the first internal electrode 13 and the first extraction section 20, and the other side is the second internal electrode 14 and the second extraction section 21. The edges of each of the first and second drawers 20 and 21 appear on the cutting line 25.

Such a ceramic green sheet 24
Are prepared, and the first ceramic green sheet 24 is provided.
On top, the second ceramic green sheets 24 are stacked while being shifted in the + Y direction by one interval of the cutting line 25, and then the third ceramic green sheets 24 are shifted in the + X direction by one interval of the cutting line 26. Then, the fourth ceramic green sheets 24 are stacked in the −Y direction while being shifted by one interval of the cutting line 25, and thereafter, such stacking is repeated as necessary.

The mother laminate thus obtained is then pressed and then cut along cutting lines 25 and 26 to remove the individual laminates 15 in the green state. . Next, these green laminates 15 are fired, and when first and second external electrodes are provided on the first and second end faces 16 and 17, respectively, a desired multilayer ceramic capacitor is completed.

FIG. 4 is a diagram corresponding to FIG. 1 for explaining a second embodiment of the present invention. In FIG. 4, elements corresponding to the elements shown in FIG. 1 are denoted by the same reference numerals, and redundant description will be omitted. FIG. 4 shows a laminate 15a.
Although the first end face 16a is shown in this embodiment, in this embodiment, the first drawer part 20a drawn to the first end face 16a and the second drawer part drawn to the second end face (not shown) are shown. Each drawer has a feature. The drawing mode of the second drawer (not shown) corresponds to the first drawer shown in the drawing.
Therefore, the following description will be made with respect to the first drawer 20a, and the description of the second drawer will be omitted.

Referring to FIG. 4, a region on the first end face 16a from which the first lead-out portion 20a is drawn is defined as a laminate 15
When sequentially divided into the first, second, and third regions 28, 29, and 30 via the boundary line extending in the stacking direction of a,
One of the first drawers 20a adjacent to the stacked body 15a in the stacking direction is the first and third regions 28 and 3
0, and the other is also drawn to the second area 29.

According to this embodiment, as in the case of the above-described embodiment, the ratio of the first drawer 20a and the second drawer occupied by the first end face 16a and the second end face, respectively, is shown in FIG. It can be substantially halved compared to the conventional case shown. Therefore, brittle fracture hardly occurs on the first end face 16a and the second end face, and it is possible to suppress the occurrence of problems such as cross-sectional distortion due to cutting.

Although the present invention has been described with reference to the illustrated embodiments, other embodiments are possible within the scope of the present invention. For example, in the first embodiment,
For each of the first lead-out portion 20 and the second lead-out portion 21, one of the adjacent ones in the stacking direction of the stacked body 15 is drawn out to the first region 22, and the other is connected to the second region 22.
And in the second embodiment, and in the second embodiment,
With respect to each of the first lead-out portion 20a and the second lead-out portion, one of the adjacent ones in the stacking direction of the stacked body 15a is drawn out to the first and third regions 28 and 30, and the other is drawn out to the second and third regions 28 and 30. Drawn to area 29,
Without being limited to these, the first
Further, the number of regions where the respective regions from which the second extraction portions are respectively extracted are extended through the boundary line extending in the stacking direction of the stacked body is further increased, thereby further diversifying the regions from which adjacent ones of the extraction portions should be extracted. You may.

In each of the above-described embodiments, each of the first lead-out portion 20 or 20a and the second lead-out portion 21 that is adjacent to the stacked body 15 or 15a in the stacking direction of the stacked body 15 or 15a Are positioned so as not to overlap with each other in the stacking direction of the layers. However, the present invention is not limited to this, and the positions in the width direction may be different from each other while partially overlapping.

Further, in each of the above-described embodiments, the ceramic layer 12 is made of a dielectric ceramic. Therefore, the present invention is applied to a multilayer ceramic capacitor. With the layers, the multilayer electronic component according to the present invention can be used as a multilayer varistor. In each of the embodiments described above, the ceramic layer 12 included in the laminate 15 or 15a may be replaced with a layer made of a functional material other than ceramic.

[0027]

As described above, according to the present invention, the lead portion of the internal electrode has a width smaller than that of the internal electrode, and each lead portion has a width in the width direction of the one adjacent to the stacking direction of the laminate. Since the positions are different from each other, the ratio of the drawer occupying the end face of the laminate can be reduced as compared with the conventional case shown in FIG. Therefore, brittleness of the end face of the laminated body caused by cutting due to the brittleness of the internal electrode and the lead-out portion is less likely to occur, and it is possible to suppress the occurrence of problems such as distortion on the cut surface.

In the present invention, when each region on the end face from which each lead-out portion is drawn out is divided into first and second regions through a boundary line extending in the stacking direction of the laminated body, One of the members that are adjacent to each other in the stacking direction of the stacked body is drawn out to the first region, and the other is also drawn out to the second region. Alternatively, each region on the end face from which each drawn out part is drawn out, When the first, second, and third regions are successively divided into three through a boundary line extending in the stacking direction of the stack, one of the drawer portions that is adjacent to the stack in the stacking direction of the stack is the first and second. By being drawn out to three regions and the other being drawn out to the second region, for each lead-out portion, those adjacent to each other in the stacking direction of the stacked body overlap with each other in the stacking direction of the stacked body. It can be made to be positioned so as not. And, in this way, for each of the drawers, the ones adjacent in the stacking direction of the stacked body are positioned so as not to overlap with each other in the stacking direction of the stacked body. Can be substantially halved as compared with the conventional case shown in FIG. 6, and the distance between the adjacent drawer portions can be further increased. Therefore, brittle fracture at the end face caused by cutting is less likely to occur, and the effect of suppressing the occurrence of problems such as distortion on the cut surface can be further enhanced.

When the present invention is applied to a multilayer ceramic capacitor in which a functional material layer is made of a dielectric ceramic, the ceramic green sheet becomes thinner and the number of layers becomes smaller under the recent trend of multilayer ceramic capacitors having a thin film multilayer structure. Tend to be more, so that
The ratio occupied by the lead portion on the end face of the laminate becomes extremely high, and a state in which brittle fracture is more likely to be caused is brought about, so that the above-mentioned effects are more effectively exhibited.

[Brief description of the drawings]

FIG. 1 is a view showing a first end face 16 of a multilayer body 15 provided in a multilayer ceramic capacitor according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along line II-II of FIG.

FIG. 3 is a plan view showing a ceramic green sheet 24 prepared to obtain the ceramic layer 12 shown in FIG.

FIG. 4 shows a first end face 16a of a multilayer body 15a provided in a multilayer ceramic capacitor according to a second embodiment of the present invention.
FIG. 2 is a diagram corresponding to FIG.

FIG. 5 is a longitudinal sectional view showing a conventional multilayer ceramic capacitor 1 of interest to the present invention.

6 is a view showing a first end face 6 of a multilayer body 5 provided in the multilayer ceramic capacitor 1 shown in FIG.

[Explanation of symbols]

 Reference Signs List 12 ceramic layer (functional material layer) 13 first internal electrode 14 second internal electrode 15, 15a laminate 16, 16a first end face 17 second end face 20, 20a first lead-out part 21 second lead-out Part 22, 28 First area 23, 29 Second area 30 Third area

Claims (4)

[Claims] 1. A stacked body including a plurality of stacked functional material layers and a plurality of internal electrodes extending along a specific interface between the plurality of functional material layers, and first and second end faces of the stacked body. A first and a second external electrode respectively provided on the first electrode, wherein the internal electrode is connected to the first external electrode at a first extraction portion which is extended to the first end face. A first internal electrode connected to the second external electrode, and a second internal electrode connected to a second lead portion that is drawn out to the second end face so as to be connected to the second external electrode; In the multilayer electronic component, the electrode and the second internal electrode are alternately arranged while overlapping with each other in a stacking direction of the multilayer body.
And having a width narrower than the second internal electrode, and that, in each of the first and second lead-out portions, the positions in the width direction of those adjacent to the stacking direction of the stacked body are different from each other. Characterized by multilayer electronic components. 2. The method according to claim 1, wherein, for each of the first and second drawers, ones adjacent to each other in the stacking direction of the stacked body are positioned so as not to overlap with each other in the stacking direction of the stacked body. The laminated electronic component as described. 3. The method according to claim 1, wherein the first and second end faces are arranged on the first and second end faces.
And each region from which the second lead-out portion is drawn out is connected to the first through a boundary line extending in the stacking direction of the stacked body.
When divided into two regions, the first and second regions
3. For each of the drawers, one of the drawers adjacent to the stack in the stacking direction of the stack is drawn to the first region, and the other is drawn to the second region.
3. The laminated electronic component according to item 1. 4. The method according to claim 1, wherein the first and second end surfaces are arranged on the first and second end faces.
When each of the regions from which the second drawer and the second drawer are drawn out is sequentially divided into first, second, and third regions through a boundary line extending in the stacking direction of the laminate, the first region is divided into three regions.
2. For each of the first and second drawers, one of adjacent ones in the stacking direction of the stacked body is drawn to the first and third regions, and the other is drawn to the second region. 3. The laminated electronic component according to 2.