JP6848399B2 - Manufacturing method of laminated electronic components - Google Patents

Description

The present invention relates to a method for manufacturing a laminated electronic component.

In the manufacturing process of the multilayer ceramic capacitor, a crimping step is performed in which a large number of green sheets having an internal electrode layer formed by using a conductive paste are laminated to form a laminate, and the laminate is crimped.

In the laminated body, a step is generated in the laminated thickness between the portion where the internal electrode layer is formed and the portion where the internal electrode layer is not formed. Therefore, a larger pressure is applied to the portion where the internal electrode layer is formed in the crimping step, and the conductive paste spreads to the portion where the internal electrode layer is not formed. Therefore, the shape of the internal electrode pattern is designed based on the fact that the conductive paste spreads in the crimping process.

Patent Document 1 discloses an example of a so-called three-terminal capacitor having one internal electrode extraction portion on one side surface as a monolithic ceramic capacitor.

Japanese Unexamined Patent Publication No. 2013-201417

Until now, when designing the shape of the internal electrode pattern formed on the green sheet used in the manufacture of 3-terminal capacitors, even if the conductive paste spreads, the conductive paste does not squeeze out other than the electrode lead-out portion on the side surface of the laminate. I was doing it.
Specifically, in consideration of the fact that the conductive paste spreads outward in the width direction in the crimping process, the width of the insulating pattern portion, which is a region where there is no internal electrode pattern in the width direction, is widened. Then, even if the conductive paste spreads outward, it stays within the width of the widened insulation pattern portion so that the conductive paste does not protrude to the side surface of the laminate.

This will be described below with reference to the drawings.
8 (a) and 8 (b) are top views schematically showing an example of a green sheet on which an internal electrode pattern is formed, which has an internal electrode pattern for manufacturing a 3-terminal capacitor in the prior art. .. FIG. 8 (c) is a plan view showing the internal electrode patterns shown in FIGS. 8 (a) and 8 (b) in an overlapping manner. FIG. 8D is a plan view schematically showing how the internal electrode pattern expands when the laminate having the internal electrode pattern shown in FIG. 8C is crimped.

In the first green sheet 610a shown in FIG. 8A, when the first end face electrode 623a reaches the first short side 613a, which is the first end face when the laminated body is formed, the first end face electrode 623a is formed. The second end face electrode 624a reaches the second short side 614a which is the second end face.
On the other hand, in the second green sheet 610b shown in FIG. 8B, the first side electrode 621b reaches the first long side 611b, which is the first side surface when the laminated body is formed, and the laminated body is formed. The second side electrode 622b reaches the second long side 612b, which is the second side surface.

FIG. 8C shows the internal electrode patterns when the first green sheet 610a and the second green sheet 610b are overlapped with each other. In the shape obtained by stacking two green sheets, the capacity of the capacitor is exhibited by the portion obtained by overlapping the internal electrode patterns of the two types of green sheets. This "portion where the internal electrode patterns of the two types of green sheets overlap" is called a capacitance forming portion. The capacitance forming portion 630 in FIG. 8C is a rectangle surrounded by a thick dotted line having four vertices 660a, 660b, 660c, and 660d. The capacitance forming portion 630 shown in FIG. 8C has a rectangular shape as a design shape, and is not the same as the shape of the capacitance forming portion actually obtained through the crimping step.
The portion without hatching in FIG. 8C is the insulating pattern portion 690, which is a region without any internal electrode pattern.

When the laminated body having the stacked internal electrode patterns is crimped as shown in FIG. 8C, the conductive paste constituting the internal electrode pattern spreads toward the insulating pattern portion. FIG. 8C shows the direction in which the conductive paste spreads with an arrow, and FIG. 8D shows the internal electrode pattern after the conductive paste spreads.
In particular, from the four vertices of the rectangle as the design shape of the capacitance forming portion (positions indicated by reference numerals 660a, 660b, 660c and 660d in FIG. 8C) toward the insulation pattern portion 690, and the first length. The conductive paste spreads toward the side 611 or the second long side 612. Then, the tip of the expanded conductive paste (indicated by reference numerals 641a, 641b, 641c and 641d) approaches the first long side 611 or the second long side 612.

In this way, even if the conductive paste spreads at the four corners of the rectangle, the conductive paste does not reach the first long side 611 or the second long side 612, and the tip of the spread conductive paste is used as a starting point. It is necessary to secure the width of the insulation pattern portion as much as necessary for insulation. Schematically shows the width required for insulation as double arrow W ₁ in FIG. 8 (d). This width W ₁ is the shortest distance between the tip of the widened internal electrode pattern and the first long side or the second long side.

On the other hand, the width of the insulating pattern portion is sufficiently large for the portion where the internal electrode pattern is not expanded. This width is shown as a double-headed arrow W _2. It can be seen that this width W ₂ is widely secured so as not to reach the first long side or the second long side even if the conductive paste spreads at the four corners of the rectangle.

By widening the width of the insulating pattern portion in this way, it is possible to prevent the conductive paste from protruding to the side surface of the laminate.
On the other hand, in multilayer ceramic capacitors, there is an increasing demand for smaller size and larger capacity, and in order to achieve smaller size and larger capacity, it is required to increase the proportion of capacitance forming portions.
However, as described above, if the width of the insulating pattern portion is widened in order to prevent the conductive paste from protruding to the side surface, it is inevitable that the proportion of the capacity forming portion is reduced. There was a problem that the request could not be met.

The present invention has been made to solve the above problems, and it is possible to increase the proportion of the capacitance forming portion and prevent the conductive paste from protruding to the side surface in the crimping process. It is an object of the present invention to provide a method for manufacturing a part.

As a result of examining means capable of solving the above problems, the present inventors have found that an internal electrode pattern capable of preventing the conductive paste from protruding to the side surface in the crimping process without increasing the width of the insulating pattern portion. He found a design guideline and came up with the present invention.
That is, in the method for manufacturing a laminated electronic component of the present invention, the first green sheet in which the internal electrode pattern of the first shape is formed of the conductive paste and the internal electrode pattern of the second shape are formed of the conductive paste. It is a method of manufacturing a laminated electronic component including a laminating step of laminating 2 green sheets to produce a laminated body and a crimping step of crimping the laminated body in the laminating direction, and is an internal electrode pattern having the first shape. In the figure drawn when the internal electrode patterns of the second shape are overlapped with each other, the internal electrode pattern portion, which is a region having one of the internal electrode patterns, and the insulation pattern, which is a region without any internal electrode pattern, are formed. It is characterized in that the shape of the internal electrode pattern portion is designed in a direction away from the design shape by the amount that the internal electrode pattern spreads to the insulating pattern portion in the crimping process.

In the method for manufacturing a laminated electronic component of the present invention, the internal electrode pattern portion has a capacitance forming portion in which the internal electrode pattern of the first shape and the internal electrode pattern of the second shape overlap each other. The design shape of the forming portion is rectangular, and the shape of the internal electrode pattern portion is the insulating pattern portion with respect to the design shape so that the internal electrode pattern expands to the insulating pattern portion to form a rectangular capacitance forming portion in the crimping process. It is preferable that it is designed in a direction away from.

In the method for manufacturing a laminated electronic component of the present invention, the internal electrode pattern of the first shape reaches the first end face electrode reaching one end in the length direction of the first green sheet and the other end. It has a second end face electrode, and the internal electrode pattern of the second shape reaches the first side electrode reaching one end in the width direction of the second green sheet and the other end. It has two side electrodes, and the figure drawn when the internal electrode pattern of the first shape and the internal electrode pattern of the second shape are overlapped is the design shape of the capacitance forming portion drawn in the center. The first end face electrode, the second end face electrode, the first side electrode, and the second side electrode each protrude from the four sides of a certain rectangle in a substantially cross shape, and the four corners of the rectangle are chamfered. It is preferable that the laminated electronic component is a three-terminal capacitor because of its shape.

In the method for manufacturing a laminated electronic component of the present invention, the figure drawn when the internal electrode pattern of the first shape and the internal electrode pattern of the second shape are overlapped is the design shape of the capacitance forming portion drawn in the center. A first side electrode, a second side electrode, and a third side electrode are provided so as to project from one long side of the rectangle in this order, and a fourth side electrode and a fifth side electrode are provided from the other long side of the rectangle. The side electrode and the sixth side electrode are provided so as to project in order, and are provided between the first side electrode and the second side electrode, and between the second side electrode and the third side electrode. The shape of the internal electrode pattern portion between the side electrodes is designed so that the farther away from any of the side electrodes, the more away from the insulating pattern portion with respect to one long side of the rectangle. The more the shape of the internal electrode pattern portion between the side electrode and the fifth side electrode and between the fifth side electrode and the sixth side electrode is separated from any of the side electrodes, the more rectangular the rectangle is. It is preferably designed so as to be away from the insulation pattern portion with respect to the other long side, and the laminated electronic component is a capacitor having three terminals at the internal electrode extraction points on one side.

In the method for manufacturing a laminated electronic component of the present invention, the internal electrode pattern of the first shape is a first side electrode, a second side electrode, and a first side electrode reaching one end in the width direction of the first green sheet. The internal electrode pattern of the second shape has three side electrodes, and the fourth side electrode, the fifth side electrode, and the sixth side electrode reach the other end in the width direction of the second green sheet. It is preferable to have a side electrode of.

In the method for manufacturing a laminated electronic component of the present invention, the internal electrode pattern of the first shape includes a first side electrode and a third side electrode that reach one end in the width direction of the first green sheet. It has a fifth side electrode that reaches the other end, and the internal electrode pattern of the second shape is the fourth side electrode that reaches the other end in the width direction of the second green sheet. It is preferable to have a sixth side electrode and a second side electrode reaching one end.

In the method for manufacturing a laminated electronic component of the present invention, the figure drawn when the internal electrode pattern of the first shape and the internal electrode pattern of the second shape are overlapped is the design shape of the capacitance forming portion drawn in the center. The first side electrode and the second side electrode are provided so as to project from one long side of the rectangle in order, and the third side electrode and the fourth side electrode are sequentially provided from the other long side of the rectangle. It is a shape that is provided so as to protrude, and the longer the shape of the internal electrode pattern portion between the first side electrode and the second side electrode is, the farther away from one of the side electrodes, the longer side of one of the rectangles. It is designed in a direction away from the insulating pattern portion, and the more the shape of the internal electrode pattern portion between the third side electrode and the fourth side electrode is separated from any of the side electrodes. It is preferably designed in a direction away from the insulation pattern portion with respect to the other long side of the rectangle, and the laminated electronic component is a capacitor having two terminals for drawing out the internal electrodes on one side.

In the method for manufacturing a laminated electronic component of the present invention, the internal electrode pattern of the first shape reaches the first side electrode reaching one end in the width direction of the first green sheet and the other end. It has a fourth side electrode, and the internal electrode pattern of the second shape has a third side electrode reaching the other end in the width direction of the second green sheet, and one end. It is preferable to have a second side electrode that reaches.

According to the method for manufacturing a laminated electronic component of the present invention, a method for manufacturing a laminated electronic component capable of increasing the proportion of the capacitance forming portion and preventing the conductive paste from protruding to the side surface in the crimping step. Can be provided.

FIG. 1 is a perspective view schematically showing an example of a multilayer ceramic capacitor that can be manufactured by the method for manufacturing a laminated electronic component of the present invention. FIG. 2A is a top view schematically showing the internal electrode pattern of the first green sheet, and FIG. 2B is a top view schematically showing the internal electrode pattern of the second green sheet. is there. FIG. 2C is a plan view showing the internal electrode patterns shown in FIGS. 2A and 2B in an overlapping manner. FIG. 2D is a plan view schematically showing how the internal electrode pattern expands when the laminate having the internal electrode pattern shown in FIG. 2C is crimped. 3 (a), 3 (b), 3 (c), 3 (d) and 3 (e) are schematic views showing another example of the shape in which the corners of the rectangle are chamfered. FIG. 4A is a top view schematically showing the internal electrode pattern of the first green sheet, and FIG. 4B is a top view schematically showing the internal electrode pattern of the second green sheet. is there. FIG. 4 (c) is a plan view showing the internal electrode patterns shown in FIGS. 4 (a) and 4 (b) in an overlapping manner. FIG. 4D is a plan view schematically showing how the internal electrode pattern expands when the laminate having the internal electrode pattern shown in FIG. 4C is crimped. FIG. 5A is a top view schematically showing the internal electrode pattern of the first green sheet, and FIG. 5B is a top view schematically showing the internal electrode pattern of the second green sheet. is there. 5 (c) is a plan view showing the internal electrode patterns shown in FIGS. 5 (a) and 5 (b) superimposed. FIG. 5D is a plan view schematically showing how the internal electrode pattern expands when the laminate having the internal electrode pattern shown in FIG. 5C is crimped. FIG. 5E is a schematic view illustrating the dimensions of the shape of the internal electrode pattern portion between the side electrodes. FIG. 6A is a top view schematically showing the internal electrode pattern of the first green sheet, and FIG. 6B is a top view schematically showing the internal electrode pattern of the second green sheet. is there. FIG. 6 (c) is a plan view showing the internal electrode patterns shown in FIGS. 6 (a) and 6 (b) in an overlapping manner. FIG. 6D is a plan view schematically showing how the internal electrode pattern expands when the laminate having the internal electrode pattern shown in FIG. 6C is crimped. FIG. 7A is a top view schematically showing the internal electrode pattern of the first green sheet, and FIG. 7B is a top view schematically showing the internal electrode pattern of the second green sheet. is there. FIG. 7 (c) is a plan view showing the internal electrode patterns shown in FIGS. 7 (a) and 7 (b) superimposed. FIG. 7D is a plan view schematically showing how the internal electrode pattern expands when the laminate having the internal electrode pattern shown in FIG. 7C is crimped. 8 (a) and 8 (b) are top views schematically showing an example of a green sheet on which an internal electrode pattern is formed, which has an internal electrode pattern for manufacturing a 3-terminal capacitor in the prior art. .. FIG. 8 (c) is a plan view showing the internal electrode patterns shown in FIGS. 8 (a) and 8 (b) in an overlapping manner. FIG. 8D is a plan view schematically showing how the internal electrode pattern expands when the laminate having the internal electrode pattern shown in FIG. 8C is crimped.

Hereinafter, a method for manufacturing a laminated electronic component of the present invention will be described with reference to the drawings. However, the present invention is not limited to the following configurations, and can be appropriately modified and applied without changing the gist of the present invention. It should be noted that a combination of two or more individual desirable configurations of the present invention described below is also the present invention.

Hereinafter, the method for manufacturing a laminated electronic component of the present invention will be described by taking the case of manufacturing a multilayer ceramic capacitor as an example.
FIG. 1 is a perspective view schematically showing an example of a multilayer ceramic capacitor that can be manufactured by the method for manufacturing a laminated electronic component of the present invention.
In the multilayer ceramic capacitor 1 shown in FIG. 1, a side surface external electrode 21 is provided on the first side surface 11 of the laminate 10, and a side surface external electrode 22 is provided on the second side surface 12. Further, the end face external electrode 23 is provided on the first end face 13 of the laminated body 10, and the end face external electrode 24 is provided on the second end face 14.
The portion where each external electrode is provided is a portion where the internal electrode is pulled out from the side surface or the end surface of the laminated body. In FIG. 1, the internal electrode behind the external electrode is schematically shown by a dotted line. The multilayer ceramic capacitor 1 shown in FIG. 1 is a so-called three-terminal capacitor having external electrodes on the side surface and the end surface.
Hereinafter, a method for manufacturing a laminated electronic component capable of manufacturing such a laminated ceramic capacitor will be described.

First, a first green sheet in which the internal electrode pattern of the first shape is formed of the conductive paste and a second green sheet in which the internal electrode pattern of the second shape is formed of the conductive paste are laminated to form a laminate. Perform the laminating process to produce.
In both the first green sheet and the second green sheet, the internal electrode pattern is formed by the conductive paste on the ceramic green sheet, which can be prepared as follows.

Ceramic green is obtained by applying a ceramic slurry, which is a mixture of ceramic as a dielectric layer, an organic substance, a solvent, etc., onto a carrier film such as a PET film in the form of a sheet by a method such as spray coating, die coating, or screen printing. Get a sheet.
Subsequently, a conductive paste for forming an internal electrode pattern, which is made of a metal material such as Ni powder, a solvent, a dispersant, a binder, or the like, is prepared. The conductive paste for forming the internal electrode pattern is printed on the ceramic green sheet by a method such as screen printing or gravure printing to form the internal electrode pattern.
In this way, a green sheet on which the internal electrode pattern is formed is prepared.
By making the internal electrode patterns different, a first green sheet and a second green sheet can be obtained.

As the ceramic to be the dielectric layer, for example _{, a ceramic material containing barium titanate (BaTIO 3} ), calcium titanate (CaTIO ₃ ), strontium titanate (SrTIO ₃ ), calcium zirconate (CaZrO ₃ ) or the like as a main component. including. Further, the ceramic material may contain Mn, Mg, Si, Co, Ni, rare earths and the like as subcomponents having a content smaller than that of the main component.
Examples of the organic substance contained in the ceramic slurry include a polyvinyl butyral-based binder as a binder, a phthalate ester-based binder and the like.
The thickness of the ceramic green sheet is preferably 0.5 μm or more and 1.2 μm or less.

The conductive paste for forming the internal electrode pattern preferably contains a metal material such as Ni, Cu, Ag, Pd, Ag—Pd alloy or Au. It is also preferable that a dielectric material having the same composition as the ceramic material contained in the ceramic green sheet is contained.
The thickness of the internal electrode pattern formed on the green sheet is preferably 0.2 μm or more and 1.5 μm or less. When the thickness of the internal electrode pattern is 0.2 μm or more, the continuity of the internal electrodes is improved, so that the acquisition capacity does not decrease. Further, when the thickness of the internal electrode pattern is 1.5 μm or less, the adhesion between the green sheets does not decrease, and the occurrence of structural defects such as delamination can be prevented.

The top-viewed shapes of the first green sheet and the second green sheet are preferably rectangular, and the length of the long side of the rectangle is preferably 0.5 mm or more and 1.5 mm or less. Further, the length of the short side of the rectangle is preferably 0.4 mm or more and 0.6 mm or less.
Further, the first green sheet and the second green sheet are laminated to prepare a laminated body, and the number of laminated sheets is preferably 100 or more and 900 or less.

Further, in producing the laminated body, it is preferable to laminate the outer layer green sheet for forming the outer layer on the outer side of the green sheet on which the internal electrode pattern is formed.
The outer layer green sheet is a ceramic green sheet having no internal electrode pattern. The thickness of the outer layer green sheet is preferably 1 μm or more and 10 μm or less.

In the method for manufacturing a laminated electronic component of the present application, the shape of the internal electrode pattern is designed to a predetermined shape. Hereinafter, an example of a preferable shape of the internal electrode pattern in which the laminated electronic component is a 3-terminal capacitor will be described.
FIG. 2A is a top view schematically showing the internal electrode pattern of the first green sheet, and FIG. 2B is a top view schematically showing the internal electrode pattern of the second green sheet. is there.
FIG. 2C is a plan view showing the internal electrode patterns shown in FIGS. 2A and 2B in an overlapping manner. FIG. 2D is a plan view schematically showing how the internal electrode pattern expands when the laminate having the internal electrode pattern shown in FIG. 2C is crimped.

In the internal electrode pattern of the first shape of the first green sheet 110a shown in FIG. 2A, the first end face electrode 123a is formed on the first short side 113a, which is the first end face when formed into a laminated body. The second end face electrode 124a reaches the second short side 114a, which becomes the second end face when the laminated body is formed.
In the internal electrode pattern of the first shape shown in FIG. 2A, the rectangle shown by the thick dotted line having four vertices 160a, 160b, 160c, and 160d is the design shape of the capacitance forming portion 130.
In the first green sheet 110a shown in FIG. 2A, the width of the end face electrode and the width of the capacitance forming portion are the same.

On the other hand, in the internal electrode pattern having the second shape of the second green sheet 110b shown in FIG. 2B, the first long side 111b, which is the first side surface when formed into a laminated body, has a first The side electrode 121b reaches, and the second side electrode 122b reaches the second long side 112b, which is the second side surface when the laminated body is formed.
In the internal electrode pattern of the second shape shown in FIG. 2B, the rectangle shown by the thick dotted line having four vertices 160a, 160b, 160c, and 160d is the design shape of the capacitance forming portion 130. The internal electrode pattern of the second shape has a corner portion 150a, a corner portion 150b, a corner portion 150c, and a corner portion 150d in which the four corners of the rectangle are chamfered.

FIG. 2C shows the internal electrode patterns when the first green sheet 110a and the second green sheet 110b are overlapped with each other. FIG. 2C shows the design shape of the capacitance forming portion 130 as a rectangle surrounded by a thick dotted line.
The portion without hatching in FIG. 2C is the insulating pattern portion 190, which is a region without any internal electrode pattern.

When the laminated body having the stacked internal electrode patterns is crimped as shown in FIG. 2C, the conductive paste constituting the internal electrode pattern spreads toward the insulating pattern portion. FIG. 2C shows the direction in which the conductive paste spreads with an arrow, and FIG. 2D shows the internal electrode pattern after the conductive paste spreads.
Specifically, the conductive paste is directed toward the insulating pattern portion 190 from the vicinity of the corner portion 150a, the corner portion 150b, the corner portion 150c, and the corner portion 150d, and toward the first long side 111 or the second long side 112. Spreads.
Unlike the internal electrode pattern after crimping shown in FIG. 8D, in the internal electrode pattern after crimping shown in FIG. 2D, the position of the conductive paste in which the laminate is crimped and spread is the design of the capacitance forming portion. It forms a rectangle that almost matches the shape. Therefore, the width W of the insulating pattern portion becomes substantially uniform.

In this way, the width W of the insulating pattern portion after crimping becomes substantially uniform, so that the uniform width W may be the width required for insulation.
Therefore, it is not necessary to secure a width of the insulation pattern portion larger than the width required for insulation, so that the ratio of the capacitance forming portion can be increased. As a result, it is possible to meet the demand for larger capacity.
The width of the insulating pattern portion of the green sheet before crimping is preferably 5 μm or more and 100 μm or less. It should be noted that this width is a width measured at a place other than the corner where the corner of the rectangle is chamfered.
Further, it is preferable that the width W of the insulating pattern portion after crimping is 5 μm or more and 100 μm or less. Further, it is preferable that the linearity (variation of width W) of the insulating pattern portion after crimping is 5 μm or less.
According to the present invention, it was possible to achieve an example in which the maximum value of the width W of the insulating pattern portion after crimping is 61 μm and the minimum value is 60 μm, and the linearity of the insulating pattern portion after crimping is 1 μm. On the other hand, the conditions corresponding to the conventional method are that the maximum value of the width W of the insulation pattern portion after crimping is 67 μm and the minimum value is 61 μm, and the linearity of the insulation pattern portion after crimping is as large as 6 μm. ..
Further, the area of the design shape of the capacitance forming portion is preferably 80% or more with respect to the area of the green sheet. If the width of the insulating pattern portion after crimping can be reduced, the ratio of the area of the design shape of the capacitance forming portion can be increased.

That is, in the internal electrode pattern described so far, the shape of the internal electrode pattern portion is the insulating pattern portion with respect to the design shape so that the internal electrode pattern expands to the insulating pattern portion to form a rectangular capacitance forming portion in the crimping process. It can be said that it is designed in a direction away from.
Specifically, the corner portion 150a, the corner portion 150b, the corner portion 150c, and the corner portion 150d form an insulating pattern portion with respect to the four vertices 160a, 160b, 160c, and 160d, which are the design shapes of the capacitance forming portion. It is formed in a direction away from.

Further, the figure drawn when the internal electrode pattern of the first shape and the internal electrode pattern of the second shape are overlapped is the first end face from the four sides of the rectangle which is the design shape of the capacitance forming portion drawn in the center. The electrode, the second end face electrode, the first side electrode, and the second side electrode each have a substantially cross shape in which they protrude, and a rectangular square is chamfered.
This shape is the shape shown in FIG. 2C, and four electrodes (first end face electrode 123, second end face electrode 124, first side surface) are shown from the thick dotted line showing the design shape of the capacitance forming portion 130. It can be seen that the electrode 121 and the second side electrode 122) are protruding.

3 (a), 3 (b), 3 (c), 3 (d) and 3 (e) are schematic views showing another example of the shape in which the corners of the rectangle are chamfered.
In each figure, the dotted line portion shows a part of the rectangle which is the design shape of the capacitance forming portion, and the apex indicated by the dotted line is the apex of the rectangle.
In each drawing, points P and Q, which are two points that are the starting points of chamfering, are shown.
The point P is the point on the long side of the green sheet, and the point Q is the point on the short side of the green sheet.
FIG. 3A shows a shape in which the internal electrode pattern is convex with respect to the straight line connecting the points P and Q.
FIG. 3B shows a shape in which the internal electrode pattern is concave from the straight line connecting the points P and Q.
FIG. 3C shows a shape in which points P and Q are connected in a staircase pattern.
FIG. 3D shows a shape in which points P and Q are connected in a stepped manner, and protrusions are provided from each step.
In each of these shapes, the shape of the internal electrode pattern portion is designed in a direction away from the insulation pattern portion with respect to the design shape of the capacitance forming portion.

FIG. 3E is a schematic view illustrating the dimensions of the shape in which the corners of the rectangle are chamfered.
The chamfer shape shown in FIG. 3 (e) is a shape in which two points P and Q are connected by a straight line, similar to the chamfer shape shown in FIG. 2 (b).
The dimensions of the chamfered shape are determined by the positions of points P and Q.
The chamfering angle is the angle θ on the point P side. The chamfering angle θ is preferably 1 ° or more and 45 ° or less.
The depth of the chamfer is a dimension indicated by the depth of the point Q side by a double-headed arrow W _3. The chamfering depth W ₃ is preferably 1 μm or more and 100 μm or less.

Next, another example of a preferable internal electrode pattern in which the laminated electronic component is a 3-terminal capacitor will be described.
FIG. 4A is a top view schematically showing the internal electrode pattern of the first green sheet, and FIG. 4B is a top view schematically showing the internal electrode pattern of the second green sheet. is there.
FIG. 4 (c) is a plan view showing the internal electrode patterns shown in FIGS. 4 (a) and 4 (b) in an overlapping manner. FIG. 4D is a plan view schematically showing how the internal electrode pattern expands when the laminate having the internal electrode pattern shown in FIG. 4C is crimped.

In the internal electrode pattern having the first shape of the first green sheet 210a shown in FIG. 4A, the first end face electrode 223a is formed on the first short side 213a, which is the first end face when formed into a laminated body. The second end face electrode 224a reaches the second short side 214a, which is the second end face when the laminated body is formed.
In FIG. 4A, the rectangle shown by the thick dotted line having four vertices 260a, 260b, 260c, and 260d is the design shape of the capacitance forming portion 230.
The first green sheet 210a shown in FIG. 4A is different from the first green sheet 110a shown in FIG. 2A in that the width of the end face electrode and the width of the capacitance forming portion are different.

The first green sheet 210a has a rectangular square portion 250a, a corner portion 250b, a corner portion 250c, and a corner portion 250d, which are the design shapes of the capacitance forming portion 230.
The relationship between the rectangle and the corner portion, which is the design shape of the capacitance forming portion, can be the same as the relationship between the rectangle and the corner portion in the second green sheet 110b shown in FIG. 2 (b).

On the other hand, in the internal electrode pattern having the second shape of the second green sheet 210b shown in FIG. 4B, the first long side 211b, which is the first side surface when formed into a laminated body, has a first The side electrode 221b reaches, and the second side electrode 222b reaches the second long side 212b, which is the second side surface when the laminated body is formed.

In the internal electrode pattern of the second shape shown in FIG. 4B, the rectangle shown by the thick dotted line having four vertices 260a, 260b, 260c, and 260d is the design shape of the capacitance forming portion 230. The internal electrode pattern of the second shape has a corner portion 250a, a corner portion 250b, a corner portion 250c, and a corner portion 250d in which the four corners of the rectangle are chamfered.
The relationship between the rectangle and the corner portion, which is the design shape of the capacitance forming portion, can be the same as the relationship between the rectangle and the corner portion in the second green sheet 110b shown in FIG. 2 (b).

FIG. 4C shows the internal electrode patterns when the first green sheet 210a and the second green sheet 210b are overlapped with each other. FIG. 4C shows the design shape of the capacitance forming portion 230 as a rectangle surrounded by a thick dotted line.
The portion without hatching in FIG. 4C is the insulation pattern portion 290, which is a region without any internal electrode pattern.

When the laminated body having the stacked internal electrode patterns is crimped as shown in FIG. 4C, the conductive paste constituting the internal electrode pattern spreads toward the insulating pattern portion. FIG. 4C shows the direction in which the conductive paste spreads with an arrow, and FIG. 4D shows the internal electrode pattern after the conductive paste spreads.
The relationship between FIGS. 4 (c) and 4 (d) is the same as that between FIGS. 2 (c) and 2 (d), and in the internal electrode pattern after crimping shown in FIG. 4 (d), the laminated body is formed. The position of the conductive paste that has been crimped and spread almost coincides with the design shape of the capacitance forming portion to form a rectangle. Therefore, the width W of the insulating pattern portion becomes substantially uniform at the portion in contact with the capacitance forming portion.
Since the preferable range of the width of the insulating pattern portion before and after crimping and the preferable shape and dimensions of the corner portion can be the same as those described above, detailed description thereof will be omitted.

Next, an example of a preferable internal electrode pattern in which the laminated electronic component serves as a capacitor having three terminals for drawing out the internal electrodes on one side surface will be described.
FIG. 5A is a top view schematically showing the internal electrode pattern of the first green sheet, and FIG. 5B is a top view schematically showing the internal electrode pattern of the second green sheet. is there.
5 (c) is a plan view showing the internal electrode patterns shown in FIGS. 5 (a) and 5 (b) superimposed. FIG. 5D is a plan view schematically showing how the internal electrode pattern expands when the laminate having the internal electrode pattern shown in FIG. 5C is crimped.
FIG. 5E is a schematic view illustrating the dimensions of the shape of the internal electrode pattern portion between the side electrodes.

In the internal electrode pattern having the first shape of the first green sheet 310a shown in FIG. 5A, the first side electrode is formed on the first long side 311a, which is the first side surface when formed into a laminated body. 321a, the second side electrode 322a and the third side electrode 323a have reached.

In the second-shaped internal electrode pattern of the second green sheet 310b shown in FIG. 5B, the fourth side electrode is formed on the second long side 312b, which is the second side surface when formed into a laminated body. The 324b, the fifth side electrode 325b and the sixth side electrode 326b have reached.

In FIGS. 5A and 5B, the rectangle shown by the thick dotted line having four vertices 360a, 360b, 360c, and 360d is the design shape of the capacitance forming portion 330.

FIG. 5C shows the internal electrode patterns when the first green sheet 310a and the second green sheet 310b are overlapped with each other. FIG. 5C shows the design shape of the capacitance forming portion 330 as a rectangle surrounded by a thick dotted line.
The portion without hatching in FIG. 5C is the insulating pattern portion 390, which is a region without any internal electrode pattern.

Hereinafter, the shape of the internal electrode pattern portion between the side electrodes will be described focusing on the shape of the internal electrode pattern portion between the first side electrode and the second side electrode.
The shape of the internal electrode pattern portion between the first side electrode 321 and the second side electrode 322 is the long side of the rectangle (reference numeral 331) which is the design shape of the capacitance forming portion 330 as the distance from the side electrode increases. It is designed in a direction away from (the part indicated by).
This is clear from the relationship between the long side 331 of the rectangle between the first side electrode 321 and the second side electrode 322 and the boundary line 351 and the boundary line 352 which are a part of the shape of the internal electrode pattern portion. Is. This will be described with reference to FIG. 5 (e).

FIG. 5E is a schematic view illustrating the dimensions of the shape of the internal electrode pattern portion between the side electrodes.
Boundary 351 as a starting point a point P ₁ on the first side electrode 321 goes toward the inside (away from the insulating pattern portions 390) than rectangular long side 331 is a design shape of the capacitor design unit. The boundary line 352 is a starting point a point _{P 2} on the second side electrode 322 goes toward the inside (away from the insulating pattern portions 390) than the long side 331. The position corresponding to the midpoint of the first side electrode 321 and the second side electrode 322 is the intersection Q of the boundary line 351 and the boundary line 352, and this intersection Q is the intersection Q of the first side electrode 321 and the second side electrode 322. It is the farthest position from any of them, and is the farthest position from the insulation pattern portion 390. Further, this intersection Q is the position farthest from the long side 331 of the rectangle which is the design shape of the capacitance forming portion 330.

Boundary 351 is a line that connects the point P ₁ and the point Q, the boundary line 352 is a line that connects the point P ₂ and the point Q, the shape of the boundary line, FIG. 3 (a), 3 ( It can be the same as the chamfered shape described with reference to b), FIG. 3 (c), FIG. 3 (d) and FIG. 3 (e).
The angle theta ₁ angle border points P ₁ or point P _{2 side,} can be defined as theta _2, also with the distance of the long side 331 and the intersection point Q, and the depth W ₄ of the internal electrode pattern part Can be determined. Angle theta ₁ of the boundary _line, the preferable range of the theta ₂ is the same as the angle theta of the chamfer in FIG. 3 (e), the preferred range of the internal electrode pattern of the depth W ₄ is the depth of the chamfer in FIG 3 (e) is the same as that of the _{W 3} is.

When the laminated body having the stacked internal electrode patterns is crimped as shown in FIG. 5C, the conductive paste constituting the internal electrode pattern spreads toward the insulating pattern portion. FIG. 5C shows the direction in which the conductive paste spreads with an arrow, and FIG. 5D shows the internal electrode pattern after the conductive paste spreads.
The relationship between FIGS. 5 (c) and 5 (d) is the same as that between FIGS. 2 (c) and 2 (d), and in the internal electrode pattern after crimping shown in FIG. 5 (d), the laminated body is formed. The position of the conductive paste that has been crimped and spread almost coincides with the design shape of the capacitance forming portion to form a rectangle. Therefore, the width W of the insulating pattern portion becomes substantially uniform.

Next, another example of a preferable internal electrode pattern in which the laminated electronic component is a capacitor of the three terminals of the internal electrode extraction points on one side surface will be described.
FIG. 6A is a top view schematically showing the internal electrode pattern of the first green sheet, and FIG. 6B is a top view schematically showing the internal electrode pattern of the second green sheet. is there.
FIG. 6 (c) is a plan view showing the internal electrode patterns shown in FIGS. 6 (a) and 6 (b) in an overlapping manner. FIG. 6D is a plan view schematically showing how the internal electrode pattern expands when the laminate having the internal electrode pattern shown in FIG. 6C is crimped.

In the internal electrode pattern having the first shape of the first green sheet 410a shown in FIG. 6A, the first side electrode is formed on the first long side 411a, which is the first side surface when formed into a laminated body. 421a and the third side electrode 423a have reached.
Further, the fifth side electrode 425a reaches the second long side 412a, which is the second side surface when the laminated body is formed.

In the internal electrode pattern having the second shape of the second green sheet 410b shown in FIG. 6B, the second side electrode is formed on the first long side 411b, which is the first side surface when formed into a laminated body. 422b has been reached.
Further, the fourth side electrode 424b and the sixth side electrode 426b reach the second long side 412b, which is the second side surface when the laminated body is formed.

In FIGS. 6A and 6B, the rectangle shown by the thick dotted line having four vertices 460a, 460b, 460c, and 460d is the design shape of the capacitance forming portion 430.

FIG. 6C shows the internal electrode patterns when the first green sheet 410a and the second green sheet 410b are overlapped with each other. FIG. 6C shows the design shape of the capacitance forming portion 430 as a rectangle surrounded by a thick dotted line.
The shape of the internal electrode pattern portion shown in FIG. 6 (c) is the same as the shape of the internal electrode pattern portion shown in FIG. 5 (c), and which green sheet the side electrode is derived from is different. ..
Preferred forms such as a rectangular long side 431, an insulating pattern portion 490, a boundary line 451 and a boundary line 452, which are the shapes of the internal electrode pattern portions between the first side electrode 421 and the second side electrode 422, are respectively. Since each part shown in FIG. 5C can be the same as the corresponding part, detailed description thereof will be omitted.

When the laminated body having the stacked internal electrode patterns is crimped as shown in FIG. 6C, the conductive paste constituting the internal electrode pattern spreads toward the insulating pattern portion. FIG. 6C shows the direction in which the conductive paste spreads with an arrow, and FIG. 6D shows the internal electrode pattern after the conductive paste spreads.
The relationship between FIGS. 6 (c) and 6 (d) is the same as that between FIGS. 5 (c) and 5 (d), and in the internal electrode pattern after crimping shown in FIG. 6 (d), the laminated body is formed. The position of the conductive paste that has been crimped and spread almost coincides with the design shape of the capacitance forming portion to form a rectangle. Therefore, the width W of the insulating pattern portion becomes substantially uniform.

Next, an example of a preferable internal electrode pattern in which the laminated electronic component serves as a capacitor for two terminals of the internal electrode extraction points on one side surface will be described.
FIG. 7A is a top view schematically showing the internal electrode pattern of the first green sheet, and FIG. 7B is a top view schematically showing the internal electrode pattern of the second green sheet. is there.
FIG. 7 (c) is a plan view showing the internal electrode patterns shown in FIGS. 7 (a) and 7 (b) superimposed. FIG. 7D is a plan view schematically showing how the internal electrode pattern expands when the laminate having the internal electrode pattern shown in FIG. 7C is crimped.

In the internal electrode pattern of the first shape of the first green sheet 510a shown in FIG. 7A, the first side electrode is formed on the first long side 511a, which is the first side surface when formed into a laminated body. 521a has been reached.
Further, the fourth side electrode 524a reaches the second long side 512a, which is the second side surface when the laminated body is formed.

In the internal electrode pattern having the second shape of the second green sheet 510b shown in FIG. 7B, the second side electrode is formed on the first long side 511b, which is the first side surface when formed into a laminated body. 522b has been reached.
Further, the third side electrode 523b reaches the second long side 512b, which is the second side surface when the laminated body is formed.

In FIGS. 7 (a) and 7 (b), the rectangle shown by the thick dotted line having four vertices 560a, 560b, 560c, and 560d is the design shape of the capacitance forming portion 530.

FIG. 7C shows the internal electrode patterns when the first green sheet 510a and the second green sheet 510b are overlapped with each other. FIG. 7C shows the design shape of the capacitance forming portion 530 as a rectangle surrounded by a thick dotted line.
The portion without hatching in FIG. 7 (c) is the insulation pattern portion 590, which is a region without any internal electrode pattern.

The shape of the internal electrode pattern portion between the first side electrode 521 and the second side electrode 522 is such that the farther away from either side electrode, the farther away from the long side of the rectangle which is the design shape of the capacitance forming portion 530. Is designed for.
This is the long side of the rectangle between the first side electrode 521 and the second side electrode 522 (the portion indicated by reference numeral 531), and the boundary line 551 and the boundary line which are a part of the shape of the internal electrode pattern portion. It is clear from the relationship of 552.
These relationships are described with reference to FIGS. 5 (c) and 5 (e), and the long side of the rectangle between the first side electrode 321 and the second side electrode 322 (the portion indicated by reference numeral 331). ) And the boundary line 351 and the boundary line 352, which are a part of the shape of the internal electrode pattern portion, can be made similar to the relationship, and thus detailed description thereof will be omitted.

When the laminated body having the stacked internal electrode patterns is crimped as shown in FIG. 7 (c), the conductive paste constituting the internal electrode pattern spreads toward the insulating pattern portion. FIG. 7 (c) shows the direction in which the conductive paste spreads with an arrow, and FIG. 7 (d) shows the internal electrode pattern after the conductive paste spreads.
The relationship between FIGS. 7 (c) and 7 (d) is the same as that between FIGS. 5 (c) and 5 (d), and in the internal electrode pattern after crimping shown in FIG. 7 (d), the laminated body is formed. The position of the conductive paste that has been crimped and spread almost coincides with the design shape of the capacitance forming portion to form a rectangle. Therefore, the width W of the insulating pattern portion becomes substantially uniform.

A crimping step is performed in which a laminated body obtained by laminating such a first green sheet and a second green sheet is crimped in the laminating direction.
The crimping conditions are not particularly limited, and conditions usually known as crimping conditions for laminated bodies may be applied. Further, the elastic sheet may be placed above and below the laminated body and then crimped. Further, a rigid body press may be performed after crimping using an elastic sheet.

After that, a laminated ceramic capacitor can be obtained by firing the laminated body and forming an external electrode. These steps can be performed by a known method.

Up to this point, the manufacturing method of the laminated electronic component of the present invention has been described by taking the case of manufacturing a multilayer ceramic capacitor as an example, but the laminated electronic component manufactured by the manufacturing method of the laminated electronic component of the present invention is limited to the multilayer ceramic capacitor. It is not something that is done.
In the case of electronic components other than multilayer ceramic capacitors, piezoelectric ceramics such as PZT-based ceramics, semiconductor ceramics such as spinel-based ceramics, and magnetic ceramics such as ferrite can be used as the ceramics constituting the dielectric layer.
When a piezoelectric ceramic is used, it functions as a piezoelectric component, when a semiconductor ceramic is used, it functions as a thermistor, and when a magnetic ceramic is used, it functions as an inductor. In these laminated electronic components, the effect of increasing the capacitance is not obtained, but the effect of obtaining the internal electrode pattern according to the design shape is exhibited.

1 Multilayer ceramic capacitor 10 Laminated body 11 First side surface 12 Second side surface 13 First end surface 14 Second end surface 21, 22 Side surface external electrodes 23, 24 End surface external electrodes 110a, 210a, 310a, 410a, 510a First Green Sheets 110b, 210b, 310b, 410b, 510b Second Green Sheets 121, 121b, 221b, 321, 321a, 421, 421a, 521, 521a First Side Electrodes 122, 122b, 222b, 222, 222a, 422 422b, 522, 522b Second side electrode 123, 123a, 223a First end face electrode 124, 124a, 224a Second end face electrode 130, 230, 330, 430, 530 Capacity forming part 190, 290, 390, 490 , 590 Insulation pattern part 323a, 423a, 523b Third side electrode 324b, 424b, 524a Fourth side electrode 325b, 425a Fifth side electrode 326b, 426b Sixth side electrode 331, 431, 513 Long side of rectangular 351 and 352, 451 and 452, 551 and 552 boundaries

Claims (6)

A laminated body is produced by laminating a first green sheet in which the internal electrode pattern of the first shape is formed of the conductive paste and a second green sheet in which the internal electrode pattern of the second shape is formed of the conductive paste. Laminating process and
A method for manufacturing a laminated electronic component, which includes a crimping step of crimping the laminated body in the laminating direction.
In the figure drawn when the internal electrode pattern of the first shape and the internal electrode pattern of the second shape are overlapped, the internal electrode pattern portion which is the region where any of the internal electrode patterns is located and the inside of which. There is an insulation pattern part that is an area without an electrode pattern,
The internal electrode pattern portion includes a capacitance forming portion in which the internal electrode pattern of the first shape and the internal electrode pattern of the second shape overlap.
The design shape of the capacitance forming portion is rectangular,
The shape of the internal electrode pattern portion is designed in a direction away from the design shape so as to form a rectangular capacitance forming portion by expanding the internal electrode pattern to the insulating pattern portion in the crimping process.
The internal electrode pattern of the first shape has a first end face electrode reaching one end in the length direction of the first green sheet and a second end face electrode reaching the other end.
The internal electrode pattern of the second shape has a first side electrode reaching one end in the width direction of the second green sheet and a second side electrode reaching the other end.
The figure drawn when the internal electrode pattern of the first shape and the internal electrode pattern of the second shape are overlapped is the first end face from the four sides of the rectangle which is the design shape of the capacitance forming portion drawn in the center. The electrode, the second end face electrode, the first side electrode, and the second side electrode each have a substantially cross shape in which they protrude, and the rectangular squares are chamfered.
In the chamfered shape of the internal electrode pattern of the first shape and the internal electrode pattern of the second shape, the chamfer angle θ including the point P on the length direction side is 1 ° or more and 45 ° or less.
A method for manufacturing a laminated electronic component, characterized in that the laminated electronic component is a 3-terminal capacitor. A laminated body is produced by laminating a first green sheet in which the internal electrode pattern of the first shape is formed of the conductive paste and a second green sheet in which the internal electrode pattern of the second shape is formed of the conductive paste. Laminating process and
A method for manufacturing a laminated electronic component, which includes a crimping step of crimping the laminated body in the laminating direction.
In the figure drawn when the internal electrode pattern of the first shape and the internal electrode pattern of the second shape are overlapped, the internal electrode pattern portion which is the region where any of the internal electrode patterns is located and the inside of which. There is an insulation pattern part that is an area without an electrode pattern,
The internal electrode pattern portion includes a capacitance forming portion in which the internal electrode pattern of the first shape and the internal electrode pattern of the second shape overlap.
The design shape of the capacitance forming portion is rectangular,
The shape of the internal electrode pattern portion is designed in a direction away from the design shape so as to form a rectangular capacitance forming portion by expanding the internal electrode pattern to the insulating pattern portion in the crimping process.
The figure drawn when the internal electrode pattern of the first shape and the internal electrode pattern of the second shape are overlapped is the first from one long side of the rectangle which is the design shape of the capacitance forming portion drawn in the center. The side electrode, the second side electrode, and the third side electrode are provided so as to project in order, and the fourth side electrode, the fifth side electrode, and the sixth side electrode are arranged in order from the other long side of the rectangle. Each has a protruding shape,
The shape of the internal electrode pattern portion between the first side electrode and the second side electrode and between the second side electrode and the third side electrode is separated from any side electrode. It is designed in a direction away from the insulation pattern portion with respect to one long side of the rectangle.
The shape of the internal electrode pattern portion between the fourth side electrode and the fifth side electrode and between the fifth side electrode and the sixth side electrode is separated from any side electrode. It is designed in a direction away from the insulation pattern portion with respect to the other long sides of the rectangle.
A method for manufacturing a laminated electronic component, wherein the laminated electronic component serves as a capacitor having three terminals for drawing out internal electrodes on one side surface. The internal electrode pattern of the first shape has a first side electrode, a second side electrode, and a third side electrode that reach one end in the width direction of the first green sheet.
The claim that the internal electrode pattern of the second shape has a fourth side electrode, a fifth side electrode, and a sixth side electrode reaching the other end in the width direction of the second green sheet. 2. The method for manufacturing a laminated electronic component according to 2. The internal electrode pattern of the first shape includes a first side electrode and a third side electrode reaching one end in the width direction of the first green sheet, and a fifth side electrode reaching the other end. And have
The internal electrode pattern of the second shape includes a fourth side electrode and a sixth side electrode reaching the other end in the width direction of the second green sheet, and a second side electrode reaching one end. The method for manufacturing a laminated electronic component according to claim 2. A laminated body is produced by laminating a first green sheet in which the internal electrode pattern of the first shape is formed of the conductive paste and a second green sheet in which the internal electrode pattern of the second shape is formed of the conductive paste. Laminating process and
A method for manufacturing a laminated electronic component, which includes a crimping step of crimping the laminated body in the laminating direction.
In the figure drawn when the internal electrode pattern of the first shape and the internal electrode pattern of the second shape are overlapped, the internal electrode pattern portion which is the region where any of the internal electrode patterns is located and the inside of which. There is an insulation pattern part that is an area without an electrode pattern,
The internal electrode pattern portion includes a capacitance forming portion in which the internal electrode pattern of the first shape and the internal electrode pattern of the second shape overlap.
The design shape of the capacitance forming portion is rectangular,
The shape of the internal electrode pattern portion is designed in a direction away from the design shape so as to form a rectangular capacitance forming portion by expanding the internal electrode pattern to the insulating pattern portion in the crimping process.
The figure drawn when the internal electrode pattern of the first shape and the internal electrode pattern of the second shape are overlapped is the first from one long side of the rectangle which is the design shape of the capacitance forming portion drawn in the center. The side electrode and the second side electrode of the above are provided in order, and the third side electrode and the fourth side electrode are provided in order from the other long side of the rectangle.
The farther the shape of the internal electrode pattern portion between the first side electrode and the second side electrode is from any of the side electrodes, the farther away from the insulating pattern portion with respect to one long side of the rectangle. Designed in the direction,
The farther the shape of the internal electrode pattern portion between the third side electrode and the fourth side electrode is from any of the side electrodes, the farther away from the insulating pattern portion with respect to the other long side of the rectangle. Designed in the direction,
A method for manufacturing a laminated electronic component, wherein the laminated electronic component serves as a capacitor having two terminals for drawing out internal electrodes on one side surface. The internal electrode pattern of the first shape has a first side electrode reaching one end in the width direction of the first green sheet and a fourth side electrode reaching the other end. ,
The internal electrode pattern of the second shape has a third side electrode reaching the other end in the width direction of the second green sheet and a second side electrode reaching one end. The method for manufacturing a laminated electronic component according to claim 5.

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