JP2000138127A - Laminated ceramic capacitor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a laminated ceramic capacitor on which the irregularity of capacity, when positional deviation in L and W directions is generated, is reduced. SOLUTION: The first and the second outer electrodes 4 and 5, where rectangular dielectric ceramic layers 1a, 1b..., the first inner electrode layer 2 arranged between the dielectric ceramic layers and the second inner electrode layer 3 arranged between the layers adjacent to the thickness direction, are arranged on a pair of edge faces of the laminated body in this ceramic capacitor. The first band-like electrodes 2a and 3b, to be connected to the first outer electrode 4, and the second band-like electrodes 2b and 3a are provided side by side on the first and the second inner electrode layers 2 and 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a strip electrode constituting an internal electrode layer of a multilayer ceramic capacitor.

[0002]

2. Description of the Related Art A multilayer ceramic capacitor has a rectangular dielectric ceramic layer, a first internal electrode layer disposed between the dielectric ceramic layers, and a layer disposed between the adjacent layers in the thickness direction. The first and second external electrodes are formed on a pair of end surfaces of a laminated body 1 in which a second internal electrode layer is laminated. As shown in FIG. 6, the laminated body 61 having the most typical structure has a rectangular shape on one side of a first green sheet 61a serving as a dielectric ceramic layer, serving as an internal electrode having one end exposed on one end face of the sheet. The first conductive film 62 is formed by printing a conductive paste, and although not shown in the drawing, the other end is exposed on the other end surface of the second green sheet to be a dielectric ceramic layer. A second conductive film having a rectangular shape is formed, and the two green sheets are alternately laminated, pressed, and integrally formed by firing the green sheet and the conductive film.

FIG. 7 is a sectional view of such a laminated body 61. That is, in the laminate 61, the dielectric ceramic layer 6
Internal electrodes 62 and 63 are alternately laminated between layers 1, 61a and 61b.

Although not shown in the figure, the internal electrodes 62
The first external electrode is provided on one end face where
The second external electrodes were formed on the other end surfaces from which 3 extended.

[0005] However, since the multilayer ceramic capacitor is quite small, when printing a conductive paste,
In addition, misalignment occurs when laminating the ceramic green sheets. As a result, there is a problem that the variation in the capacitance of the multilayer ceramic capacitor is increased.

In printing the internal electrodes, the peripheral portion of the internal electrodes rises by about 0.1 to 2 μm from the central portion.
In the structure of FIG. 7, the density of the peripheral portion of the internal electrode in the laminating direction tends to be the highest compared to the density of the other portions in the laminating direction. As described above, when a plurality of green sheets are laminated and pressed, there is a problem that the density distribution in the laminating direction becomes extremely non-uniform, and delamination, binder removal, and sinterability appear non-uniformly. .

Further, during the manufacturing process of the multilayer ceramic capacitor, the internal electrode of metal and the dielectric of ceramic are distorted inside the laminated body 61 due to the difference in the thermal expansion coefficient and the behavior during sintering. Stress occurs. This internal stress is particularly concentrated on the peripheral portions of the internal electrodes 62 and 63. In addition, since the longitudinal sides of the internal electrodes 62 and 63 overlap with each other, the internal stress concentrates on the side of each internal electrode, and there is no occurrence of cracks or internal cracks inside the multilayer ceramic capacitor. Even in this case, there is a problem that the thermal shock resistance is greatly reduced.

In order to solve these problems, conventionally, multilayer ceramic capacitors shown in FIGS. 8 and 9 have been proposed (Japanese Patent Laid-Open Nos. 8-181,035 and 8-250,369).
reference).

That is, the electrode width of the first internal electrode 82 formed on the green sheet serving as the dielectric ceramic layer 81a is narrow, and the first internal electrode 82 formed on the green sheet serving as the green sheet 81b serving as the dielectric ceramic layer 81b is formed. (2) The electrode width of the internal electrode 83 is increased.

According to the multilayer ceramic capacitor having such a structure, even if the printing position of the conductive paste is slightly shifted in the width (W) direction to form the internal electrodes 82 and 83,
Also, even if the lamination position of the green sheets slightly shifts in the W direction, if the internal electrode 82 having a narrow electrode width is within the internal electrode 83 having a wide electrode width, there is no change in the facing area between the two, and printing deviation or lamination deviation occurs. This prevents variations in capacitance due to

Further, the internal electrodes 82 and 83 provided adjacent to and opposed to each other with one dielectric layer interposed therebetween have different side margin areas without overlapping side portions. In addition, the non-uniformity of the density distribution in the laminating direction is reduced, and the frequency of occurrence of a defective rate due to dielectric breakdown around the internal electrodes 82 and 83 is greatly reduced. Further, since the positions of the concentrated portions of the internal stress generated at the side portions of the adjacent internal electrodes 82 and 83 are dispersed, internal defects during firing are suppressed, and the thermal shock resistance is greatly improved.

However, according to the structures shown in FIGS. 8 and 9, it is necessary to use two types of plates for printing the first internal electrode 82 and the second internal electrode 83, respectively.
There has been a problem that the cost for equipment for accurately adjusting the type of plate making to a desired position increases.

Therefore, a structure as shown in FIGS. 10 and 11 has been proposed.

The first internal electrode layer (101) has a first strip electrode 101a and a second strip electrode 101b formed on a green sheet to be the dielectric ceramic layer 101a. The second internal electrode layer (102) has a first strip-shaped electrode 102a and a second strip-shaped electrode 102b formed on the green sheet to be the dielectric ceramic layer 101b. The first internal electrode layer 101 extends to one end face of the multilayer body 10 and is connected to the first external electrode 103 formed on this end face. Also, the second internal electrode layer 10
2 extends to the other end face of the laminate 10 and is connected to the second external electrode 104 formed on this end face.

In the first internal electrode layer 101, the electrode widths of the first band-shaped electrode 101a and the second band-shaped electrode 101b are different from each other.
02a and the second band-shaped electrode 102b have different electrode widths. In the figure, the first strip electrode 1 of the first internal electrode layer 101 is shown.
The width of the electrode 01a is narrow, and the width of the second strip-shaped electrode 101b is wide. The electrode width of the first strip electrode 102a of the second internal electrode layer 102 facing the first strip electrode 101a of the first internal electrode layer 101 is increased,
The electrode width of the second band-shaped electrode 102b of the second internal electrode layer 102 facing the second band-shaped electrode 101b of the internal electrode layer 101 is narrow.

Since the structure of the first internal electrode layer 101 and the structure of the second internal electrode layer 102 can be made the same, one type of plate making can be performed. Further, in this structure, the gap between the first and second strip electrodes arranged side by side, on which the internal electrodes are not printed, becomes a passage or an escape path for the debinding gas, and also a heat treatment in the firing step. The difference in expansion and contraction between the internal electrode layer on the sheet and the green sheet is reduced. For this reason, the internal stress distortion at the time of debinding, the ease of debinding treatment, and the crimpability of the multilayer chip are improved, and a multilayer ceramic capacitor with high productivity and high reliability, particularly with a large capacity, can be obtained. There is also an effect that can be done.

[0017]

However, FIG. 10 and FIG.
1, according to the multilayer ceramic capacitor, as shown in FIGS. 8 and 9, even if the first internal electrode layer 101 and the second internal electrode layer 102 are shifted in the width (W) direction, the facing area is substantially equal. Since the capacitance does not change, the capacitance does not change, but if the first internal electrode layer 101 and the second internal electrode layer 102 are shifted in the length direction, the opposing areas of the two change greatly. As a result, There is a problem that a change in capacitance occurs.

The present invention has been devised in view of the above-mentioned problems, and an object of the present invention is to provide a multilayer ceramic capacitor which has a very small variation in capacitance and can have a small size and a large capacitance.

[0019]

According to the present invention, a first internal electrode layer is disposed between a plurality of stacked rectangular dielectric ceramic layers, and a second internal electrode layer is disposed between adjacent layers. In the multilayer ceramic capacitor having the first and second external electrodes formed on a pair of end surfaces of the multilayer body,
A first strip-shaped electrode connected to the first external electrode and a second strip-shaped electrode connected to the second external electrode layer are respectively provided side by side on the second internal electrode layer. First
The band-shaped electrode faces the second band-shaped electrode of the second internal electrode layer, and the second band-shaped electrode of the first internal electrode layer faces the first band-shaped electrode of the second internal electrode layer via the dielectric ceramic layer. This is a multilayer ceramic capacitor.

Further, the electrode width of the first band-shaped electrode of the first internal electrode layer and the electrode width of the first band-shaped electrode of the second internal electrode layer are equal to the electrode width of the second band-shaped electrode of the first internal electrode layer. It is wider than the electrode width of the second strip electrode of the two internal electrode layers.

The interval at which the first strip electrode and the second strip electrode of the first internal electrode layer are provided side by side is the same as the interval at which the first strip electrode and the second strip electrode of the second internal electrode layer are provided side by side. Are different.

[0022]

According to the first aspect of the invention, the first and second internal electrode layers are each composed of a first strip electrode and a second strip electrode. The first strip electrode is connected to a first external electrode formed on one of the pair of end faces of the laminate, and the second strip electrode is connected to a second external electrode formed on the other of the pair of end faces of the laminate. Connected to electrodes.

That is, the first band-shaped electrode and the second band-shaped electrode provided in parallel with the first internal electrode layer extend from different end face directions.

Therefore, even if a printing shift of the conductive paste or a stacking shift of the ceramic green sheet occurs in the longitudinal direction of the laminate in order to form a strip-shaped electrode serving as an internal electrode layer, for example, the first internal electrode layer Of the first strip electrode and the second
When one of the facing areas of the internal electrode layer facing the second belt-shaped electrode and the facing area of the first internal electrode layer facing the second belt-shaped electrode and the second internal electrode layer facing the first belt-shaped electrode decreases,
The other opposing areas increase and therefore cancel each other out. From this, it can be seen that the variation in the capacitance value due to the displacement in the longitudinal direction is effectively suppressed.

Further, the electrode width of the first strip electrode of the first internal electrode layer and the electrode width of the second strip electrode of the second internal electrode layer are set to the electrode width of the second strip electrode of the first internal electrode layer. The second
By making the width of the internal electrode layer larger than that of the first band-shaped electrode of the first internal electrode layer, the opposing area between the first band-shaped electrode of the first internal electrode layer and the second band-shaped electrode of the second internal electrode layer due to displacement in the width direction. And the opposing area between the second band-shaped electrode of the first internal electrode layer and the first band-shaped electrode of the second internal electrode layer is unlikely to fluctuate, whereby the variation of the capacitance value due to the displacement in the width direction is effectively suppressed. Will be done. As a result, a stable capacitance value can be obtained even if a shift occurs in the longitudinal direction and the width direction.

Even if the first band-shaped electrode of the first internal electrode layer having a large electrode width and the second band-shaped electrode of the second internal electrode layer are opposed to each other due to the displacement in the width direction, Since they have the same potential, no stray capacitance is generated. Therefore, the distance between the first strip-shaped electrode and the second strip-shaped electrode can be reduced, and a multilayer ceramic capacitor having a small size and a large capacity can be realized.

Further, the first and second strip electrodes have substantially the same electrode width, and the interval between the first and second strip electrodes of the first internal electrode layer is set to be equal to the second internal electrode. By making the distance between the first band-shaped electrodes and the second band-shaped electrodes of the layers different from each other, the first band-shaped electrodes of the first internal electrode layers and the second band-shaped electrodes of the first internal electrode layers are displaced in the width direction of the internal electrode layers. Variations in the opposing area of the second strip electrode and the opposing areas of the first internal electrode layer and the second strip electrode and the first internal electrode layer of the second internal electrode layer cancel each other out, and thus the capacitance value varies. Is effectively suppressed. As a result, a stable capacitance value can be obtained even if a shift occurs in the longitudinal direction and the width direction.

The distance between the first and second strip electrodes is defined, and the first and second strip electrodes have different potentials during that time. Will occur. This also provides a stable, large-capacity multilayer ceramic capacitor with no room for stray capacitance.

[0029]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a multilayer ceramic capacitor according to the present invention will be described in detail with reference to the drawings.

FIG. 1 is an external perspective view of the multilayer ceramic capacitor of the present invention. FIG. 2 is a schematic plan view illustrating the structure of a first internal electrode layer and a second internal electrode layer of the multilayer ceramic capacitor of FIG. FIG. 3 is a schematic cross-sectional view for explaining the state of the structure of the first internal electrode layer and the second internal electrode layer facing each other in the thickness direction.

In the figure, 1 is a laminate, 2 is a first internal electrode layer, 3 is a second internal electrode layer, 4 is a first external electrode,
5 is a second external electrode.

The laminate 1 is formed by laminating rectangular dielectric ceramic layers 1a, 1b,... Made of a dielectric ceramic material such as barium titanate or strontium titanate. And each dielectric ceramic layer 1
a, 1b: a first layer made of a noble metal material such as Pd or Ag-Pd alloy or a base metal material such as Ni between layers.
The internal electrode layer 2 or the second internal electrode layer 3 is provided.

A pair of end faces of the laminate 1 have A
A thick conductive film mainly composed of g or Ag alloy, a first external electrode 4 and a second external electrode 5 formed by plating are formed.

For example, in the plan view shown in FIG. 2, a first internal electrode layer 2 is formed on a green sheet to be a dielectric ceramic layer 1a, and a dielectric ceramic layer 1b
The second internal electrode layer 3 is formed on the green sheet to be formed. In FIG. 2, the second internal electrode layer 3 is indicated by a dotted line.

For example, the first internal electrode layer 2 has two types of strip electrodes 2a and 2b arranged side by side. First strip electrode 2
“a” extends from one end (right end in the figure) of the rectangular dielectric ceramic layer 1a to the center in the longitudinal direction. The second strip-shaped electrode 2b extends from the other end (the left end in the figure) of the rectangular dielectric ceramic layer 1a to the center in the longitudinal direction.

That is, the first strip electrode 2a is connected to the first external electrode 4 at one end of the dielectric ceramic layer 1a, and the second strip electrode 2b is connected to the other end of the dielectric ceramic layer 1b. The side is connected to the second external electrode 5.

The electrode width of the first strip electrode 2a is
The width is wider than the electrode width of the strip electrode 2b. Both are arranged in parallel at a predetermined interval.

The first band electrode 2a having a large electrode width of the first internal electrode layer 2 is connected to the second band electrode 3b having a narrow electrode width of the second internal electrode layer 3 via the dielectric ceramic layer 1a.
Facing. The second band-shaped electrode 2b having a narrow electrode width of the first internal electrode layer 2 is connected to the first band-shaped electrode 3 having a wide electrode width of the second internal electrode layer 3 via a dielectric ceramic layer 1a.
a.

Similarly, the second internal electrode layer 3 is formed as shown in FIG.
As shown by the dotted line, two types of band-shaped electrodes 3b and 3a are arranged in parallel. The first strip electrode 3a extends from one end side to the center in the longitudinal direction on the lower surface side (on the dielectric ceramic layer 1b) of the rectangular dielectric ceramic layer 1a.
The second strip electrode 3b is formed on the lower surface side of the rectangular dielectric ceramic layer 1a and extends from the other end to the center in the longitudinal direction.

That is, the first strip electrode 3a is connected to the first external electrode 4, and the second strip electrode 3b is connected to the second external electrode 5.

As described above, the second internal electrode layer 3
Of the second strip-shaped electrode 3b is a dielectric ceramic layer 1a, 1b
Are opposed to the first strip electrode 2a of the first internal electrode layer 2 via..., And the second strip electrode 3a is connected to the first internal electrode layer 2
Of the second band-shaped electrode 2b.

According to this structure, the first strip electrode 2a of the first internal electrode layer 2 and the second strip electrode 3b of the second internal electrode layer 3
Between the first external electrode 4 and the second external electrode 4.
It is derived from between the external electrode 5. In this facing state, for example, the second band-shaped electrode 3b having a narrow electrode width of the second electrode layer 3 has a large width of the first internal electrode layer 2 except for a portion connected to the second external electrode 5. It is arranged so as to be included in the region of the strip electrode 2a.

Further, the second band-like electrode 2 of the first internal electrode layer 2
The capacitance generated at the portion where b faces the first strip electrode 3a of the second internal electrode layer 3 is derived from between the first external electrode 4 and the second external electrode 5. In this facing state, for example, the second band-shaped electrode 2b having a narrow electrode width of the first electrode layer 2 is
Except for the connection portion with the second external electrode 5, the second internal electrode layer 3 is arranged so as to be included in the region of the first band-shaped electrode 3a having a wide electrode width.

The multilayer ceramic capacitor having the above structure is manufactured as follows.

First, a conductive film to be the first internal electrode layer 2 is formed on the first ceramic green sheet by using a conductive paste. That is, the conductor films to be the first and second strip electrodes 2a and 2b constituting the first internal electrode layer 2 are simultaneously formed by printing.

On the second ceramic green sheet, a conductive film serving as the second internal electrode layer 3 is formed with a conductive paste. That is, the conductor films to be the first and second strip electrodes 3a and 3b constituting the second internal electrode layer 3 are simultaneously formed by printing.

Each of the strip electrodes 2a, 2b (3b, 3a)
Are printed so as to be regularly arranged on a green sheet.

Thereafter, the first ceramic green sheets and the second ceramic green sheets are alternately laminated, and a margin green sheet is laminated, so that the green sheets and the strip electrodes shown in FIG. 2 are laminated. It is cut to a predetermined dimension in the direction to form an unfired laminate.

Then, the unfired laminate is fired at a predetermined atmosphere and temperature, and the internal electrode layers 2, 3 and the dielectric ceramic layers 1a, 1b,... Are integrally sintered.

Next, the first and second external electrodes 4 and 5 are formed on a pair of end surfaces of the laminated body 10 having the above structure. Specifically, a conductive paste made of Ag or an Ag-Pd alloy is dipped at an end face portion of the laminate 10 to form the laminate 10.
In order to connect to the first strip electrodes 2a, 3a of the internal electrode layers 2, 3 exposed on the pair of end faces,
A conductive paste is applied so as to be connected to the third second strip electrodes 2b, 3b. Then, baking is performed in a predetermined atmosphere and temperature, and furthermore, Ni made of a material that is unlikely to cause solder erosion.
An electrode layer made of a material such as a plating layer and Sn or a Sn—Pb alloy is formed.

As described above, according to the multilayer ceramic capacitor of the present invention, the dielectric ceramic layers 1a, 1b,.
1st strip electrode 2 of the first internal electrode layer 2 disposed between
a is connected to the first external electrode 4, and the second strip electrode 2 b is connected to the second external electrode 5. Further, the first strip electrode 3a of the second internal electrode layer 3 is connected to the first external electrode 4, and the second strip electrode 3b is connected to the second external electrode 5.

Therefore, when printing the above-mentioned strip-shaped electrode,
Even when a positional shift occurs in the longitudinal direction of the laminated body 10 when the green sheets are stacked, for example, if the first internal electrode layer 2 in FIG. 2 is shifted to the left, the first band-shaped electrode of the first internal electrode layer 2 2a and the second band-shaped electrode 3b of the second internal electrode layer 3 increase the facing area, but conversely, the second band-shaped electrode 2b of the first internal electrode layer 2 and the first band-shaped electrode of the second internal electrode layer 3 3
The area opposed to “a” decreases, and there is no change in the area opposed to “a”.
In addition, when it is shifted in the opposite direction, the increase and decrease of the facing area are reversed. For this reason, it is possible to effectively reduce the variation in the capacitance of the multilayer capacitor due to the displacement in the longitudinal direction.

At the same time, at the time of printing the strip electrode,
Even when a displacement occurs in the width direction of the laminate 10 during the lamination of the green sheets, for example, when the first internal electrode layer 2 in FIG. If it is within the allowable range due to the difference from the narrow strip electrode,
The facing area between the first strip electrode 2a of the first internal electrode layer 2 and the second strip electrode 3b of the second internal electrode layer 3 does not change, and the second strip electrode 2b of the first internal electrode layer 2 and the second strip electrode 2b do not change. The area of the internal electrode layer 3 facing the first strip electrode 3a does not change.
For this reason, there can be no variation in the capacitance of the multilayer capacitor due to the displacement in the width direction.

The first band-shaped electrode 2a of the first internal electrode layer 2 having a wide electrode width and the first band-shaped electrode 2a of the second internal electrode layer 3 having a wide electrode width are formed.
Even if the strip electrodes 3a partially face each other due to positional displacement, these strip electrodes are connected to the same first external electrode 4, so that no floating capacitance is generated. Therefore, even if the distance between the first strip-shaped electrode and the second strip-shaped electrode is reduced, there is no variation in capacitance, and the multilayer ceramic capacitor can be reduced in size and increase in capacity.

Further, since the strip electrodes 2a, 3a having a large electrode width and the strip electrodes 2b, 3b having a narrow electrode width face each other, the longitudinal sides of the strip electrodes do not overlap each other. As a result, the non-uniformity of the density distribution in the stacking direction is reduced, and the frequency of occurrence of a defective rate due to dielectric breakdown around the strip-shaped electrode can be significantly reduced. In addition, the position of the concentrated portion of the internal stress generated in the side portion of the adjacent strip electrode is shifted without being continuous in the laminating direction, so internal defects during firing are suppressed and thermal shock resistance is greatly improved. Is done.

Further, the space between the strip-shaped electrodes and the gap between the strip-shaped electrodes serves as a passage or an escape route for the debinding gas, or the internal electrode layer on the sheet and the dielectric ceramic green sheet during the heat treatment in the firing step. The difference in expansion and contraction is reduced. For this reason, the internal stress distortion at the time of debinding, the ease of debinding treatment, and the crimpability of the multilayer chip are improved, and a multilayer ceramic capacitor with high productivity and high reliability, particularly with a large capacity, can be obtained. it can.

FIG. 4 is a schematic plan view illustrating the structure of a first internal electrode layer and a second internal electrode layer of another multilayer ceramic capacitor. FIG. 5 is a schematic cross-sectional view for explaining the state of the structure of the first internal electrode layer and the second internal electrode layer facing each other in the thickness direction. 2 and 3 are denoted by the same reference numerals. In the figure, 2c is a first strip-shaped electrode constituting the first internal electrode layer 2, and 2d is a first internal electrode layer 2
, 3c is a first band-shaped electrode forming the second internal electrode layer 3, and 3d is a second band-shaped electrode forming the second internal electrode layer 3.

In this embodiment, the first strip electrodes 2c, 3c,
The second strip electrodes 2d, 3d have substantially the same electrode width.

However, in order to prevent the fluctuation of the capacitance due to the above-described displacement in the width direction, for example, the distance W between the juxtaposed portions of the first band-shaped electrode 2c and the second band-shaped electrode 2d of the first internal electrode layer 2 is set. The distance w between the juxtaposed portions of the first strip electrode 3c and the second strip electrode 3d of the second internal electrode layer 3 is different. That is, the interval W> the interval w.

The center line in the width direction of the overlapping portion between the first internal electrode layer 2 and the second internal electrode layer 3 is matched.

Here, if the first internal electrode layer 2 is displaced in the longitudinal direction, for example, in the left side of FIG. 4,
As described above, the first strip electrode 2c of the first internal electrode layer 2
The opposing area between the second internal electrode layer 3 and the second band electrode 3d increases, and the opposing area between the second internal electrode layer 2d of the first internal electrode layer 2 and the first internal band electrode 3c of the second internal electrode layer 3 increases. Decreases,
There is no change in the facing area as a whole. When the position is shifted in the opposite direction, the increase and decrease are reversed. For this reason, it is possible to effectively reduce the variation in the capacitance of the multilayer capacitor due to the displacement in the longitudinal direction.

When the first internal electrode layer 2 is displaced in the width direction, for example, in the upper part of FIG. 4, the first band-like electrode 2c of the first internal electrode layer 2 and the second internal electrode layer 3 Of the first internal electrode layer 2 and the first band-shaped electrode 3c of the second internal electrode layer 3 decrease, and as a whole, There is no change in the facing area. For this reason, it is possible to effectively reduce the variation in the capacitance of the multilayer capacitor due to the displacement in the width direction.

This displacement is half the difference ΔW between the interval W between the strip electrodes 2c and 2d of the first internal electrode layer 2 and the interval w between the strip electrodes 3c and 3d of the second internal electrode layer 3. Values up to acceptable.

The printing position shift of the conductive paste and the stacking shift of the green sheet are generated by about 100 μm even when manufactured by ordinary manufacturing management. Therefore, if the half value of the difference ΔW is set to 100 μm or more, even if a normal displacement in the width direction occurs, the variation in capacitance of the multilayer capacitor can be effectively reduced.

In this way, when a band-shaped electrode is formed on each green sheet by printing using a conductive paste, and when the printed green sheets are laminated, misalignment occurs in the longitudinal direction or the width direction. No change in the capacitance value.

Other functions and the functions described with reference to FIGS. 2 and 3 are also achieved.

In the above-described embodiment, the number of the strip electrodes arranged between one dielectric ceramic layers is two, but may be plural.

Further, the first internal electrode layer 2
The first strip electrode 3 constituting the second internal electrode layer 3 has a wider electrode width between the first strip electrode 2a and the second strip electrode 2b.
a and the second strip-shaped electrode 3b, the width of the first strip-shaped electrode 2a and the second strip-shaped electrode 2b constituting the first internal electrode layer 2 are reduced. The juxtaposed intervals between the first strip electrodes 3a and the second strip electrodes 3b constituting the internal electrode layer 3 may be different from each other.

[0069]

As described above, according to the present invention, even if printing misalignment or lamination misalignment occurs in the longitudinal direction, the variation in capacitance is extremely small, the occurrence of stray capacitance is suppressed, and the size and size are reduced. The resulting multilayer ceramic capacitor has a capacity.

Further, by making the electrode widths of the strip electrodes constituting the internal electrode layers different, and by making the intervals of the strip electrodes different, even if a further displacement occurs in the width direction, the capacitance variation is extremely large. The multilayer ceramic capacitor can be reduced in size.

Further, since the sides of the strip-shaped electrodes facing each other do not overlap each other, the unevenness of the density distribution in the laminating direction is reduced, and the frequency of occurrence of a defective rate due to dielectric breakdown can be greatly reduced. Internal defects at the time are suppressed, and the thermal shock resistance is greatly improved.

[Brief description of the drawings]

FIG. 1 is an external perspective view of a multilayer ceramic capacitor according to the present invention.

FIG. 2 is a schematic plan view of the multilayer ceramic capacitor of the present invention.

FIG. 3 is a cross-sectional view of the multilayer ceramic capacitor of the present invention.

FIG. 4 is a schematic plan view of another multilayer ceramic capacitor of the present invention.

FIG. 5 is a cross-sectional view of another multilayer ceramic capacitor of the present invention.

FIG. 6 is a schematic plan view showing internal electrodes of a conventional multilayer ceramic capacitor.

7 is a cross-sectional view of the multilayer ceramic capacitor of FIG.

FIG. 8 is a schematic plan view showing internal electrodes of a conventional multilayer ceramic capacitor.

9 is a cross-sectional view of the multilayer ceramic capacitor of FIG.

FIG. 10 is a schematic plan view showing a strip electrode of a conventional multilayer ceramic capacitor.

11 is a cross-sectional view of the multilayer ceramic capacitor of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Laminated body 1a, 1b ... Dielectric ceramic layer 2 ... 1st internal electrode layer 2a, 2c ... 1st strip electrode 2b, 2d ... 2nd strip electrode 3 ... No. 2 internal electrode layers 3b, 3c first band-shaped electrodes 3a, 3d second band-shaped electrodes 4 first external electrodes 5 second external electrodes

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5E001 AB03 AC08 AC09 AC10 AE01 AE02 AE03 AF00 AF06 AH01 AH09 AJ01 5E082 AA01 AB03 BC14 BC33 BC35 BC38 BC39 EE04 EE11 EE16 EE23 EE35 FF05 FG06 FG26 FG27 GG27 GG27 GG27 JJ12 JJ21 JJ23 LL02 MM24

Claims (3)

[Claims] A first internal electrode layer is disposed between a plurality of laminated rectangular dielectric ceramic layers, and a second internal electrode layer is disposed between adjacent layers. In the multilayer ceramic capacitor formed with first and second external electrodes, the first and second internal electrode layers are respectively connected to a first strip-shaped electrode connected to the first external electrode and a second external electrode layer. The second band-shaped electrodes are arranged side by side. The first band-shaped electrodes of the first internal electrode layer are connected to the second band-shaped electrodes of the second internal electrode layer, and the second band-shaped electrodes of the first internal electrode layer are connected to the second band-shaped electrode. (2) A multilayer ceramic capacitor characterized in that it faces a first strip-shaped electrode of an internal electrode layer via a dielectric ceramic layer. 2. An electrode width of a first strip electrode of the first internal electrode layer and a first strip electrode of the second internal electrode layer are equal to an electrode width of a second strip electrode of the first internal electrode layer. 2. The multilayer ceramic capacitor according to claim 1, wherein the width of the second internal electrode layer is wider than the electrode width of the second strip electrode. 3. An interval at which the first strip electrode and the second strip electrode of the first internal electrode layer are provided side by side, and an interval at which the first strip electrode and the second strip electrode of the second internal electrode layer are provided side by side. The multilayer ceramic capacitor according to claim 1, wherein the multilayer ceramic capacitor is different from the multilayer ceramic capacitor.