KR101952876B1 - Multi layer ceramic capacitor - Google Patents

Abstract

The present invention includes a first surface and a second surface including first and second dielectric layers and facing each other in a stacking direction, and a third surface and a fourth surface connected to and opposed to the first and second surfaces, A body including fifth and sixth surfaces connected to the first to fourth surfaces and opposing each other; A first internal electrode disposed on the first dielectric layer, exposed through the third, fifth and sixth surfaces, and spaced apart from the fourth surface by a first space; The second dielectric layer is disposed to face the first internal electrode with the first or second dielectric layer interposed therebetween, and is exposed through the fourth, fifth and sixth surfaces, and is formed from the third surface. Second internal electrodes spaced apart by two spaces; A first dielectric pattern disposed in at least a portion of the first space; A second dielectric pattern disposed in at least a portion of the second space; Side insulating layers disposed on the fifth and sixth surfaces; A first external electrode connected to the first internal electrode and disposed on the third surface; And a second external electrode connected to the second internal electrode and disposed on the fourth surface, wherein the first and second dielectric patterns have a multilayer ceramic capacitor having a different color from that of the first and second dielectric layers. to provide.

Description

Multilayer Ceramic Capacitors {MULTI LAYER CERAMIC CAPACITOR}

The present invention relates to a multilayer ceramic capacitor.

A capacitor is a device that can store electricity. Basically, two electrodes are opposed to each other, and when a voltage is applied, electricity is accumulated on each electrode. When a DC voltage is applied, current flows inside the capacitor while electricity is stored, but when the accumulation is completed, the current does not flow. On the other hand, when an alternating current voltage is applied, alternating current flows continuously while the polarity of the electrode is altered.

These capacitors are made of aluminum according to the type of insulator provided between the electrodes, an aluminum electrolytic capacitor comprising an electrode made of aluminum and having a thin oxide film between the aluminum electrodes, a tantalum capacitor using tantalum as an electrode material, and a titanium barium between the electrodes. Ceramic capacitor using high dielectric constant, multi-layer ceramic capacitor (MLCC) using high dielectric constant ceramic as multilayer structure between electrodes, and using polystyrene film as dielectric between electrodes It can be divided into several types, such as a film capacitor.

Among them, multilayer ceramic capacitors have advantages of excellent temperature characteristics and frequency characteristics and can be implemented in a small size.

In the multilayer ceramic capacitor according to the related art, a plurality of dielectric sheets are stacked to form a laminate, and external electrodes having different polarities are formed outside the laminate, and internal electrodes alternately stacked inside the laminate are formed. It may be electrically connected to each of the external electrodes.

Recently, due to the miniaturization and high integration of electronic products, many studies have been made for miniaturization and high integration in the case of multilayer ceramic capacitors. In particular, in the case of multilayer ceramic capacitors, various attempts have been made to improve the connectivity of internal electrodes while increasing the thickness of the dielectric layers by increasing the thickness of the dielectric layers.

In particular, in the development of ultra high-capacity multilayer ceramics, securing reliability of high-layer products of thin film dielectric layers and internal electrodes has become more important. As the number of stacked layers increases, the level difference due to the difference in thickness between the internal electrodes and the dielectric layers increases. This step is caused by the bending of the electrode end due to the lateral stretching of the dielectric layer in the densification process of pressing the body.

In other words, the end of the internal electrode is bent to fill the step, the margin portion is removed by the cover and the empty space due to the step by reducing the margin width. As the void caused by the step is removed, the capacitive layer is also stretched by the decreasing margin width. Such structural irregular stretching of the internal electrodes reduces the reliability of the withstand voltage characteristics of the multilayer ceramic capacitor.

The generation of such a step may be a problem in both the first direction perpendicular to the stacking direction of the multilayer ceramic capacitor and the second direction perpendicular to the stacking direction and the first direction, and a solution for this problem is needed.

Korea Patent Publication No. 10-114157 Korean Laid-Open Patent Publication No. 2005-0075903 Korean Unexamined Patent Publication No. 2013-0063234

An object of the present invention is to provide a multilayer ceramic capacitor having a structure that can solve the step problem caused by the thickness of the dielectric layer and the internal electrode.

One aspect of the present invention includes first and second dielectric layers, and includes a first surface and a second surface facing each other in a stacking direction, and a third surface and a second surface connected to and opposed to the first and second surfaces. A body including a fourth surface and a fifth surface and a sixth surface connected to the first to fourth surfaces and facing each other; A first internal electrode disposed on the first dielectric layer, exposed through the third, fifth and sixth surfaces, and spaced apart from the fourth surface by a first space; The second dielectric layer is disposed to face the first internal electrode with the first or second dielectric layer interposed therebetween, and is exposed through the fourth, fifth and sixth surfaces, and is formed from the third surface. Second internal electrodes spaced apart by two spaces; A first dielectric pattern disposed in at least a portion of the first space; A second dielectric pattern disposed in at least a portion of the second space; Side insulating layers disposed on the fifth and sixth surfaces; A first external electrode connected to the first internal electrode and disposed on the third surface; And a second external electrode connected to the second internal electrode and disposed on the fourth surface, wherein the first and second dielectric patterns have a multilayer ceramic capacitor having a different color from that of the first and second dielectric layers. to provide.

In the multilayer ceramic capacitor according to an exemplary embodiment of the present invention, the first and second internal electrodes are exposed to the fifth and sixth surfaces, which are both end surfaces in the width direction of the body, so that the step difference due to the internal electrodes is formed at both end surfaces in the width direction. It is possible to improve the reliability of the multilayer ceramic capacitor by preventing the occurrence of the step caused by the internal electrode at both ends of the longitudinal direction, including the first and second dielectric patterns that complement the stepped ends of the longitudinal direction. have.

In addition, since the first and second dielectric patterns have different colors from those of the first and second dielectric layers, since the alignment of the first and second dielectric patterns is easy when printing, the productivity and reliability of the multilayer ceramic capacitor may be improved. .

1 schematically illustrates a perspective view of a multilayer ceramic capacitor according to an embodiment of the present invention.
2 is a schematic perspective view of a body of a multilayer ceramic capacitor according to an exemplary embodiment of the present invention.
3 is a schematic cross-sectional view taken along line II ′ of FIG. 1.
4 is a schematic cross-sectional view taken along line II-II ′ of FIG. 1.
FIG. 5A is a diagram illustrating a case in which internal electrodes and dielectric patterns disposed on a ceramic sheet are aligned without misalignment during manufacturing, and FIG. 5B is a cross-sectional view of FIG. 5A.
FIG. 6A is a diagram illustrating a case where internal electrodes and dielectric patterns disposed on a ceramic sheet are misaligned during manufacturing, and FIG. 6B is a cross-sectional view of FIG.
FIG. 7A is a view illustrating a case in which internal electrodes and dielectric patterns disposed on a ceramic sheet are aligned without misalignment during a manufacturing process using a dielectric pattern having a width larger than an internal electrode gap, and FIG. 7B is a cross-sectional view of FIG. 7A.
FIG. 8A illustrates a case in which internal electrodes and dielectric patterns disposed on a ceramic sheet are displaced during a manufacturing process using a dielectric pattern having a width larger than that of the internal electrode gaps, and FIG.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. However, in describing the preferred embodiment of the present invention in detail, if it is determined that the detailed description of the related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

In addition, the same reference numerals are used throughout the drawings for parts having similar functions and functions.

In addition, the term 'comprising' a certain component throughout the specification means that, unless specifically stated otherwise, it may further include other components other than to exclude the other components.

Laminated Ceramic Electronic Components

1 schematically illustrates a perspective view of a multilayer ceramic capacitor according to an embodiment of the present invention. 2 is a schematic cross-sectional view taken along line II ′ of FIG. 1, and FIG. 3 is a schematic cross-sectional view taken along line II-II ′ of FIG. 1.

Hereinafter, the multilayer ceramic capacitor 100 according to an exemplary embodiment of the present invention will be described with reference to FIGS. 1 to 3.

The multilayer ceramic capacitor 100 according to an exemplary embodiment of the present invention may include a body 110 in which a plurality of first and second dielectric layers 111a and 111b are stacked, a first external electrode 151, and a second external electrode 152. ).

The body 110 is obtained by stacking a plurality of dielectric layers 111a and 111b in the thickness direction and then firing them. The number of dielectric layers 111a and 111b can be adjusted suitably, and it is also possible to laminate | stack tens or hundreds of layers. In this case, the dielectric layers 111a and 111b adjacent to each other of the body 110 may be integrated to such an extent that it is difficult to identify a boundary between them. In addition, the body 110 may be a hexahedron shape, but is not limited thereto.

When the body 110 is a hexahedron, the body 110 is in contact with each other in the stacking direction with the first surface 1 and the second surface 2, the first surface 1, and the second surface 2. Third and third surfaces 3 and 4 connected and opposed to each other, and fifth and fifth surfaces 6 and 6 connected to and opposed to each other, and the first to fourth surfaces 1, 2, 3, and 4, respectively. It may comprise the face (6).

In this case, the lamination direction may be referred to as a thickness direction or a first direction Z, and a direction in which the third and fourth surfaces are formed may be referred to as a longitudinal direction or a second direction X, and the fifth surface and the fifth The direction in which the six surfaces are formed may be referred to as the width direction or the third direction (Y).

Lower and upper cover layers 112 and 113 having a predetermined thickness may be formed on the lower portion of the lowermost inner electrode and the uppermost inner electrode of the body 110. In this case, the lower cover layer 112 and the upper cover layer 113 may be formed of the same composition as the dielectric layers 111a and 111b, and a dielectric layer not including the internal electrodes may be formed on top of the upper internal electrodes of the body 110. It may be formed by laminating at least one or more on the lower portion of the lower inner electrode.

The first and second dielectric layers 111a and 111b may include a high dielectric constant ceramic material. For example, the first and second dielectric layers 111a and 111b may include a BaTiO 3 (barium titanate) -based ceramic powder, but the present invention is not limited thereto. The BaTiO3-based ceramic powder is, for example, (Ba1-xCax) TiO3, Ba (Ti1-yCay) O3, (Ba1-xCax) (Ti1-yZry) in which Ca (calcium), Zr (zirconium) and the like are partially dissolved in BaTiO3. ) O3 or Ba (Ti1-yZry) O3, and the like, but the present invention is not limited thereto. In addition, the dielectric layers 111a and 111b may further include at least one or more of a ceramic additive, an organic solvent, a plasticizer, a binder, and a dispersant. As the ceramic additive, for example, transition metal oxide or carbide, rare earth element, magnesium (Mg), aluminum (Al), or the like may be used.

The first internal electrode 121 is disposed on the first dielectric layer 111a. The first internal electrode 121 is disposed on the first dielectric layer 111a to be exposed through the third surface 3, the fifth surface 5, and the sixth surface 6 of the body 110. In this case, the first internal electrode 121 is disposed to be spaced apart from the fourth surface 4 by a predetermined distance. An area spaced between the first internal electrode 121 and the fourth surface 4 may be defined as a first space 121 ′.

The second internal electrode 122 is disposed on the second dielectric layer 111b. The second internal electrode 122 is disposed on the second dielectric layer 111b to be exposed through the fourth surface 4, the fifth surface 5, and the sixth surface 6 of the body 110. In this case, the second internal electrodes 122 are disposed to be spaced apart from the third surface 3 by a predetermined distance. An area spaced apart between the second internal electrode 122 and the third surface 3 may be defined as the second space 122 ′.

The first and second internal electrodes 121 and 122 are formed and stacked on a ceramic sheet forming the first dielectric layer 111a and the second dielectric layer 111b, and then fired by one dielectric layer 111a and 111b. Interposed therebetween in the thickness direction within the body 110.

The first and second internal electrodes 121 and 122 are electrodes having different polarities, and are disposed to face each other along the stacking direction of the dielectric layers 111a and 111b, and are disposed on the dielectric layers 111a and 111b interposed therebetween. By means of electrical insulation from one another.

When the internal electrode is exposed to the outside of the body, a short circuit occurs due to the inflow of conductive foreign matter, thereby reducing the reliability of the multilayer ceramic capacitor. Therefore, in the related art, when the internal electrode is formed on the dielectric layer, the area of the dielectric layer is formed to be larger than the area of the internal electrode to form a margin on the remaining circumferential portion of the internal electrode except for the part connected to the external electrode. In other words, the margin means a region of the dielectric in which no internal electrode is formed. In the manufacturing process, when the internal electrode is formed on the dielectric layer, the internal electrode has a shape such that the internal electrode protrudes from the margin part. Due to such a protruding shape, a step is generated, and when tens or hundreds of layers of dielectric layers are stacked, the dielectric layers are stretched to fill the steps. When the dielectric layer is stretched, the internal electrodes also bend together. If the internal electrode is bent, there is a problem that the breakdown voltage (BDV) decreases in the corresponding portion.

Accordingly, the multilayer ceramic capacitor according to the exemplary embodiment of the present invention removes the margins on the fifth surface 5 and the sixth surface 6 of the body 110 to prevent the step caused by the internal electrode. Accordingly, it is possible to prevent the internal electrode from bending in the width direction to prevent the problem of decreasing the withstand voltage characteristics, thereby improving the reliability of the multilayer ceramic capacitor.

The first internal electrode 121 or the second internal electrode 122 is formed on the third surface 3 and the fourth surface 4, respectively, but the first external electrode (3) is then formed on the third surface 3. 151 is formed, and since the second external electrode 152 is formed on the fourth surface 4, the first internal electrode 121 and the second internal electrode 122 are not exposed to the outside, respectively, and the first external electrode is respectively exposed. 151 and the second external electrode 152 may be protected.

However, since the first internal electrode 121 and the second internal electrode 122 are both exposed on the fifth surface 5 and the sixth surface 6, a separate side insulating layer 140 is disposed to form the interior. It is necessary to protect the internal electrodes formed in the.

In order to form the side insulating layer 140, the body 110 may be dipped into a slurry including ceramic. The slurry may include a ceramic powder, an organic binder, and an organic solvent. The ceramic powder is a material having a high dielectric constant, and when forming the side insulating layer 140, a material having a wide operating operating range due to excellent heat resistance and durability may be used.

The ceramic powder is not limited thereto, but may be a barium titanate-based material, a lead composite perovskite-based material, a strontium titanate-based material, or the like. Preferably, barium titanate powder may be used.

The organic binder is to secure the dispersibility of the ceramic powder in the slurry, but is not limited thereto, and ethyl cellulose, polyvinyl butyral, and mixtures thereof may be used.

When the body 110 is dipped in the slurry manufactured as described above, the slurry may be applied to a surface on which the body 110 is bonded to the slurry, thereby forming the side insulating layer 140. Then, in order to form a body 110 having a desired thickness, dipping and drying may be repeated to apply a desired amount of slurry to the body 110.

When the body 110 is dipping into the slurry, external electrodes 151 and 152 should be formed on the third and third surfaces 3 and 4 of the body 110 to prevent application of the slurry. There is a need. Accordingly, the third surface 3 and the fourth surface 4 may be attached to the third surface 3 and the fourth surface 4 so as not to be exposed to the outside, and may be dipped into the slurry. Although not limited thereto, before the third surface 4 and the fourth surface 4 are cut, the third surface 3 and the fourth surface 4 may be dipping without being exposed. That is, by such dipping, the slurry may be applied to the fifth surface 5 and the sixth surface 6 of the body 110.

The side insulating layer 140 is disposed on the fifth surface 5 and the sixth surface 6, thereby preventing conductive foreign substances from entering the internal electrodes exposed to the fifth surface 5 and the sixth surface 6. can do.

In addition, the side insulating layer 140 may be formed using a polymer. For example, it may be formed by applying an epoxy to the side of the body (110).

The multilayer ceramic capacitor 100 according to the embodiment of the present invention may further improve the capacity of the multilayer ceramic capacitor by securing a maximum effective capacitance area by removing margins on the fifth surface 5 and the sixth surface 6. Can be. That is, the multilayer ceramic capacitor 100 according to the embodiment of the present invention has a side insulating layer 140 that is relatively thinner than the margin part instead of the margin part and prevents the inflow of conductive foreign matter. By arranging on the face 5 and the sixth face 6, it is possible to increase the volume capable of spherical capacitance in the multilayer ceramic capacitor 100.

However, as in the step generation caused by the margin part in the width direction, the step occurs in the longitudinal direction in which the internal electrode is connected to the external electrode. That is, even when the step difference caused by the margin part in the width direction is solved, the withstand voltage characteristic of the multilayer ceramic capacitor cannot be improved by the target value due to the step in the longitudinal direction.

The first and second internal electrodes 121 and 122 are alternately exposed to the third surface 3 and the fourth surface 4, which are both end surfaces in the longitudinal direction of the body, respectively, to expose the first and second external electrodes 151. , 152).

That is, the first internal electrode 121 is only connected to the first external electrode 151, and the second internal electrode 122 is only connected to the second external electrode 152. Therefore, the first internal electrode 121 is formed to be spaced apart from the fourth surface 4 by a predetermined distance, and the second internal electrode 122 is formed to be spaced apart from the third surface 3 by a predetermined distance.

When the dielectric layers having the internal electrodes having such a shape are stacked, the first and second internal electrodes 121 and 122 are alternately exposed to the third surface 3 and the fourth surface 4, thereby laminating them. A step may occur in a portion in which only the first internal electrode 121 or only the second internal electrode 122 is formed in the direction Z.

When stacking tens to hundreds of dielectric layers 111, the dielectric layer 111 is stretched due to a step in a portion where only the first internal electrode 121 or only the second internal electrode 122 is formed in the stacking direction Z. . By stretching the dielectric layer, the first internal electrode or the second internal electrode of the portion where only the first internal electrode or only the second internal electrode is formed in the stacking direction is bent together. The problem that the breakdown voltage characteristic is mainly reduced in the bent portion of the internal electrode.

However, the capacitor 100 according to an embodiment of the present invention has a first space when the spaced area between the first internal electrode 121 and the fourth surface 4 is defined as the first space 121 ′. When the first dielectric pattern 131 is disposed in the space 121 ′ and the spaced apart area between the second internal electrode 122 and the third surface 3 is defined as the second space 122 ′. The second dielectric pattern 132 may be disposed in the second space 122 ′ to prevent a step from occurring in a portion where only the first internal electrode 121 or only the second internal electrode 122 is formed.

That is, since the capacitor according to the exemplary embodiment includes the first and second dielectric patterns 131 and 132, only the first internal electrode 121 of the first and second internal electrodes 121 and 122 may be used. Alternatively, the step may be prevented from occurring at the portion where only the second internal electrode 122 is formed, thereby reducing the problem of decreasing the breakdown voltage characteristic occurring at the curved portion of the internal electrode.

Therefore, the multilayer ceramic capacitor 100 according to the exemplary embodiment of the present invention removes the margins on the fifth surface 5 and the sixth surface 6 and arranges the side insulating layer 140, thereby causing the step in the width direction. It is possible to prevent the breakdown voltage characteristic, and at the same time, only the first internal electrode 121 or the second internal electrode 122 among the first and second internal electrodes 121 and 122 may be formed using the first and second dielectric patterns 131 and 132. It is possible to solve the reduction in the breakdown voltage characteristic due to the step in the longitudinal direction by preventing the step from occurring in the formed portion, thereby substantially improving the breakdown voltage characteristic of the entire multilayer ceramic capacitor 100.

In addition, in the capacitor according to the exemplary embodiment, the first and second dielectric patterns 131 and 132 have different colors from those of the first and second dielectric layers 111a and 111b.

The first and second dielectric patterns 131 and 132 may be formed by printing the first and second dielectric patterns 131 and 132 in spaces spaced between the internal electrodes on the ceramic sheet on which the internal electrodes are printed. The use of other dielectrics is used for Align Matching in first and later printing. As a printing method, it can be applied to all printing methods such as a screen method or a roll-to-roll method.

In the case of using the screen method, printing can be performed by first viewing the printed material and adjusting the position. In the case of the roll-to-roll method, the continuous process can improve productivity and patterning. The roll-to-roll method that can be used) includes, for example, an offset printing method, a gravure printing method, a gravure offset printing method, and the like.

FIG. 5A is a diagram illustrating a case in which internal electrodes and dielectric patterns disposed on a ceramic sheet are aligned without misalignment during manufacturing, and FIG. 5B is a cross-sectional view of FIG. 5A. FIG. 6A is a diagram illustrating a case where internal electrodes and dielectric patterns disposed on a ceramic sheet are misaligned during manufacturing, and FIG. 6B is a cross-sectional view of FIG. 6A.

5 and 6, generally, in the process of manufacturing the multilayer ceramic capacitor, forming the internal electrode and the dielectric pattern may include forming the ceramic sheet 11 on the jig 10, and forming the ceramic sheet 11 on one surface of the ceramic sheet 11. After printing the internal electrode 20, the dielectric pattern 30 is printed between the printed internal electrodes in the longitudinal direction X. The ceramic sheet 11 becomes the first and second dielectric layers 111a and 111b after completion of manufacturing, and the dielectric pattern 30 becomes the first and second dielectric patterns 131 and 132.

At this time, precisely forming the dielectric pattern 30 at a desired position is an important factor to lower the defective rate. Therefore, as shown in FIG. 5, the dielectric pattern 30 should be accurately formed between the internal electrodes 20. If the dielectric pattern 30 is not printed at a desired position due to manufacturing error, the dielectric pattern ( 30) is t-sided to one side to form. As shown in FIG. 6, the dielectric pattern 30 is formed to be inclined by one side between the internal electrodes 20 so that the dielectric pattern 30 is not formed when the dielectric pattern 30 does not come into contact with the internal electrodes 20 on the other side. Nevertheless, the step problem due to the internal electrode 20 cannot be solved. Accordingly, it is possible to ensure that the dielectric pattern 30 is accurately disposed between the internal electrodes 20 as shown in FIG.

When the dielectric pattern 30 has the same color as the ceramic sheet 11, it is not only difficult to print the dielectric pattern at the correct position, but also it is not easy to adjust alignment through tension adjustment.

However, in the capacitor according to the embodiment of the present invention, the first and second dielectric patterns 131 and 132 have different colors from those of the first and second dielectric layers 111a and 111b, thereby printing the dielectric patterns at the correct positions. It is easy to adjust the alignment when the roll-to-roll method is applied, so that the first and second dielectric patterns 131 and 132 are formed in the first and second spaces 121 ′ and 122 ′, respectively. It can be accurately placed, further improving the productivity and reliability of multilayer ceramic capacitors.

In addition, in order to prevent the dielectric pattern 30 from being formed on one side between the internal electrodes 20 due to manufacturing errors, the dielectric pattern 30 covers the end portion of the internal electrode 20. It may be arranged to have.

FIG. 7A is a view illustrating a case in which internal electrodes and dielectric patterns disposed on a ceramic sheet are aligned without misalignment during a manufacturing process using a dielectric pattern having a width larger than an internal electrode gap, and FIG. 7B is a cross-sectional view of FIG. 7A. FIG. 8A is a view illustrating a case in which internal electrodes and dielectric patterns disposed on a ceramic sheet are displaced during a manufacturing process using dielectric patterns having a width larger than that of internal electrodes, and FIG. 8B is a cross-sectional view of FIG. 8A.

Referring to FIGS. 7 and 8, the dielectric patterns 30 are disposed to cover the ends of the internal electrodes 20, so that not only the dielectric patterns 30 are exactly formed at desired positions as shown in FIG. Even when the dielectric pattern 30 is formed on one side between the internal electrodes 20 as shown in 9b, the step difference caused by the internal electrodes 20 can be solved. In addition, since the dielectric pattern 30 is formed thicker than the internal electrode 20, a short circuit may be prevented from occurring between the internal electrodes 20 in the stacking direction due to the sliding of the dielectric layer and the internal electrodes during compression.

Accordingly, the first dielectric pattern 131 is disposed to cover the end portion of the first internal electrode 121 from the first space 121 ′, and the second dielectric pattern 132 is second space 122 ′. The second internal electrode 122 may be disposed to cover an end portion of the second internal electrode 122. Alternatively, the first dielectric pattern 131 may be disposed to cover an end portion of the first internal electrode 121 from the first space 121 ′, or the second dielectric pattern 132 may be the second space 122 ′. The second internal electrode 122 may be disposed to cover an end portion of the second internal electrode 122.

In order to make the first and second dielectric patterns 131 and 132 have a different color from the first and second dielectric layers 111a and 111b, known colorants may be used, and both pigments and dyes may be used. Can be used.

However, in the case of a pigment or a pure organic dye, there is a concern that the firing density of the multilayer ceramic capacitor may be improved and the rigidity of the multilayer ceramic capacitor may be reduced.

As a result of experiments by the inventors, a dye containing a metal complex dye, which is a dye containing a metal complex containing a metal in the form of an intramolecular complex salt, and a phthalocyanine containing Cu, When used, it was confirmed that the inherent characteristics of the multilayer ceramic capacitor were not deteriorated.

In addition, the metal of the metal complex dye (Metal complex dye) is, for example, Ni, Cr, Co and Cu, but is not limited thereto.

In this case, the content of the metal complex may be 0.05 to 3% by weight based on the total multilayer ceramic capacitor, and the metal content of the metal complex may be 0.001 to 0.1% by weight based on the total multilayer ceramic capacitor.

If the content of the metal complex is less than 0.05% by weight, or if the metal content of the metal complex is less than 0.001% by weight, the recognition rate may decrease during printing. On the other hand, when the content of the metal complex is more than 3% by weight, or when the metal content of the metal complex is more than 0.1% by weight, the density of the multilayer ceramic capacitor may be lowered and the characteristics of the multilayer ceramic capacitor may be lowered.

In addition, in order for the first and second dielectric patterns to have a different color than the first and second dielectric layers, metal complexes are included in the first and second dielectric patterns, or metal complexes are included in the first and second dielectric layers. You can.

However, when the metal complex is included in the first and second dielectric layers, the first and second dielectric layers have a large area in contact with the internal electrodes, which may affect the internal electrodes. Therefore, the metal complexes may be in the first and second dielectric patterns. It may be more desirable to include.

The first and second external electrodes are disposed on the third and fourth surfaces, respectively, and are connected to the first and second internal electrodes, respectively. In addition, the first and second external electrodes may extend to cover a portion of the first surface, the second surface, and the side insulating layer.

In conclusion, the multilayer ceramic capacitor according to an embodiment of the present invention is generated due to the margin part by arranging the first and second internal electrodes 121 and 122 to be exposed to the fifth surface 5 and the sixth surface 6. The first and second positions of the first and second internal electrodes 121 and 122 may correspond to portions where only the first internal electrode 121 or only the second internal electrode 122 is formed. By arranging the first and second dielectric patterns 131 and 132 in the two spaces 121 ′ and 122 ′, only the first internal electrode 121 or the second internal of the first and second internal electrodes 121 and 122 is disposed. The step problem caused by the portion where only the electrode 122 is formed can be solved.

In addition, since the first and second dielectric patterns 131 and 132 have different colors from those of the first and second dielectric layers 111a and 111b, it is easy to print the dielectric pattern at the correct position and is aligned by adjusting the tension ( Alignment is also easy to adjust so that the first and second dielectric patterns can be precisely disposed in the first and second spaces 121 ′ and 122 ′, respectively, thereby further improving the productivity and reliability of the multilayer ceramic capacitor. .

Therefore, the multilayer ceramic capacitor according to the exemplary embodiment of the present invention may significantly improve the breakdown voltage characteristics, productivity, and reliability of the multilayer ceramic capacitor.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and variations can be made without departing from the technical matters of the present invention described in the claims. It will be obvious to those of ordinary skill in the field.

110: body
111: dielectric layer
121, 122: internal electrode
121`, 122`: first and second space
131, 132: dielectric pattern
140: side insulation layer
151, 152: external electrode

Claims (13)

First and second surfaces comprising first and second dielectric layers and facing each other in a stacking direction, and third and fourth surfaces connected to and opposed to the first and second surfaces, and the first surface. A body including a fifth surface and a sixth surface connected to the fourth surface and opposing each other;
A first internal electrode disposed on the first dielectric layer, exposed through the third, fifth and sixth surfaces, and spaced apart from the fourth surface by a first space;
The second dielectric layer is disposed to face the first internal electrode with the first or second dielectric layer interposed therebetween, and is exposed through the fourth, fifth and sixth surfaces, and is formed from the third surface. Second internal electrodes spaced apart by two spaces;
A first dielectric pattern disposed in at least a portion of the first space;
A second dielectric pattern disposed in at least a portion of the second space;
Side insulating layers disposed on the fifth and sixth surfaces;
A first external electrode connected to the first internal electrode and disposed on the third surface; And
And a second external electrode connected to the second internal electrode and disposed on the fourth surface.
The side insulating layer, the first and second external electrodes are disposed such that the first and second dielectric patterns are not exposed to the outside.
And the first and second dielectric patterns have different colors from the first and second dielectric layers.
The method of claim 1,
And the first and second dielectric layers comprise metal complexes.
The method of claim 1,
And the first and second dielectric patterns comprise metal complexes.
The method of claim 3,
The content of the metal complex is a multilayer ceramic capacitor of 0.05 to 3% by weight based on the total multilayer ceramic capacitor.
The method of claim 3,
The metal content of the metal complex is a multilayer ceramic capacitor of 0.001 to 0.1% by weight based on the total multilayer ceramic capacitor.
The method of claim 3,
And the metal complex comprises at least one of Ni, Cr, Co, and Cu.
The method of claim 1,
The first and second dielectric patterns may include a phthalocyanine containing Cu.
The method of claim 1,
The first or second dielectric pattern is a multilayer ceramic capacitor printed by a roll to roll method.
The method of claim 1,
The first dielectric pattern is disposed to cover an end portion of the first internal electrode from the first space,
The second dielectric pattern is disposed to cover an end portion of the second internal electrode from the second space.
The method of claim 1,
The first dielectric pattern is disposed to cover an end portion of the first internal electrode from the first space,
The second dielectric pattern is disposed to cover an end portion of the second internal electrode from the second space.
The method of claim 1,
The side insulating layer is a multilayer ceramic capacitor comprising a ceramic.
The method of claim 1,
The side insulating layer is a multilayer ceramic capacitor comprising a polymer.
The method of claim 1,
The first and second external electrodes may extend to cover a portion of the first, second and side insulating layers.

Images