JP2004127959A - Process for producing laminated ceramic electronic component and laminated ceramic sheet device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To flush the end faces of laminates by arranging a different kind of electrode pattern on some electrode pattern when laminating cut ceramic sheets. <P>SOLUTION: In a first operation, a ceramic sheet 50 is cut out from a continuous ceramic sheet 10, carried onto a lamination stage 114 by means of a lamination head 108, and laminated on the lamination stage 114 while being aligned. In a second operation, a ceramic sheet 51 is cut out from the continuous ceramic sheet 10, carried onto the lamination stage 114 by means of the lamination head 108, and laminated on the previously cut ceramic sheet 50 while being aligned by turning the lamination head 108 by 90°clockwise about the central axis above the lamination stage 114 thereby turning the cut ceramic sheet 51 by 90°. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a technique for manufacturing a multilayer ceramic electronic component such as a multilayer ceramic capacitor and a multilayer ceramic inductor.
[0002]
[Prior art]
When manufacturing multilayer ceramic electronic components such as array type or area array type multilayer ceramic capacitors and multilayer ceramic inductors, for example, a desired number of ceramic sheets having L electrode patterns printed on the surface are sequentially laminated. Then, the obtained laminate is pressure-bonded by a press, and thereafter, through various steps such as degreasing and firing, L multilayer ceramic electronic components are manufactured at a time.
[0003]
Here, at least two types of L electrode patterns to be printed on the ceramic sheet are required, and when laminating the ceramic sheets, it is necessary to appropriately laminate different types.
[0004]
Therefore, conventionally, a number of printing plates are prepared according to the type of the electrode pattern, and the printing plate is changed and printed each time the type of the electrode pattern is different.
[0005]
For this reason, there have been problems that the number of printing plates is increased, the printing equipment is complicated, and that production, storage and preparation of the printing plates require a great deal of labor and cost.
[0006]
In addition, since a large number of printing plates must be selected each time the type of the electrode pattern is different, the printing process is troublesome and complicated.
[0007]
Furthermore, since the electrode pattern is printed using a large number of printing plates, a pattern shift occurs due to an error between the printing plates, and an error when laminating is added thereto. This leads to problems such as a change in the area and, in turn, a reduction in capacitance accuracy.
[0008]
Therefore, as a method for solving such a problem, a method described in, for example, JP-A-2002-184647 has been proposed in the past.
[0009]
In such a proposed example, an area pattern formed by arranging four types of electrode patterns in a matrix of M rows and N columns is repeatedly printed on the surface of a strip-shaped continuous ceramic sheet by the same printing plate making. While the sheet is being conveyed, in the cutting section, the area including the area pattern is sequentially cut out from the continuous ceramic sheet as a cut ceramic sheet for each area pattern. The different types of electrode patterns are arranged on a certain electrode pattern by laminating the ceramic patterns sequentially for one column or one row in the row or column direction for each ceramic sheet. Thus, in one multilayer ceramic electronic component, the above four types of electrode Over emissions had to be stacked in a desired order.
[0010]
[Problems to be solved by the invention]
However, in the above-mentioned proposed example, the laminating position of the cut ceramic sheets that have been cut out is shifted for each cut ceramic sheet, so that the end faces of the laminated body made of the laminated cut ceramic sheets are aligned. No, it will be uneven. After that, when pressing by pressing, the laminated body is pressed in a state where the end face is regulated by a mold or the like, but as described above, the end face of the laminated body is not aligned and it is uneven. However, since the concave portion is not restricted and free, there is a problem in that when the laminate is subjected to high temperature and high pressure during crimping, the concave portion extends and the end of the laminate is deformed. . Further, in order to avoid this problem, it is possible to cut the ends of the above-mentioned laminated body so as to make the end faces uniform so that there is no unevenness before press-bonding with a press. Is newly added, which causes a problem that the number of steps increases.
[0011]
Therefore, an object of the present invention is to solve the above-mentioned problems of the prior art, and to stack cut ceramic sheets so that different types of electrode patterns are arranged on a certain electrode pattern. It is another object of the present invention to provide a method for manufacturing a laminated ceramic electronic component and a ceramic sheet laminating apparatus capable of aligning the end faces of a laminated body composed of the ends of the laminated cut ceramic sheets.
[0012]
[Means for Solving the Problems and Their Functions and Effects]
In order to achieve at least a part of the above-described object, a method of the present invention is a method for manufacturing a multilayer ceramic electronic component,
(A) preparing a band-shaped continuous ceramic sheet on which the same region pattern is repeatedly printed in the longitudinal direction;
(B) a step of sequentially cutting out, from the continuous ceramic sheet, a region having a certain shape including the region pattern for each region pattern to obtain a cut ceramic sheet;
(C) sequentially laminating the cut out ceramic sheets;
With
The area pattern is formed by arranging a plurality of one or more types of electrode patterns in a predetermined area,
In the region pattern, the arrangement of each electrode pattern is such that, when the region pattern is rotated by a predetermined angle, the arrangement of each electrode pattern after rotation overlaps the arrangement of each electrode pattern before rotation. And
The pattern shape of the electrode pattern is such that, when the electrode pattern itself is rotated by the predetermined angle, the pattern shape after rotation is different from the pattern shape before rotation,
The shape of the region to be cut out in the step (b) is such that, when the region is rotated by the predetermined angle, the region shape before rotation matches the region shape after rotation,
In the step (c), the gist is that the cut ceramic sheet thus cut out is stacked so as to rotate by the predetermined angle relatively to the cut ceramic sheet cut out and stacked last time.
[0013]
In the present invention, when cutting and laminating a cut ceramic sheet for each region pattern, the cut ceramic sheet is laminated so as to rotate by a predetermined angle relative to the cut ceramic sheet cut and laminated last time. Accordingly, the layers can be stacked such that the electrode patterns having different pattern shapes are arranged on the electrode patterns having a certain pattern shape without shifting the stacking position. Moreover, since the lamination positions are not shifted, the end faces of the laminated body composed of the laminated ceramic sheets can be aligned. Therefore, even after that, even if the laminate is pressed by a press, the end of the laminate is not deformed. Moreover, since it is not necessary to cut the end of the laminate, the number of steps does not increase.
[0014]
In the method for manufacturing a multilayer ceramic electronic component of the present invention, it is preferable that the predetermined angle is one of approximately 90 degrees and approximately 180 degrees. By setting such an angle, positioning can be performed with high accuracy when laminating.
[0015]
Here, “substantially 90 degrees” includes a range of 80 degrees to 100 degrees, and “substantially 180 degrees” includes a range of 170 degrees to 190 degrees. The direction of rotation is not particularly limited.
[0016]
Note that the present invention is not limited to aspects of the method invention such as the above-described method for manufacturing a multilayer ceramic electronic component, but can also be realized in aspects as an apparatus invention such as a ceramic sheet laminating apparatus.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in the following order based on examples.
A. Outline of configuration and operation of ceramic sheet laminating device:
B. Example of area pattern:
C. Ceramic sheet cutting and laminating operation:
D. Effects of the embodiment:
E. FIG. Modification:
[0018]
A. Outline of configuration and operation of ceramic sheet laminating device:
FIG. 1 is a configuration diagram showing a ceramic sheet laminating apparatus as one embodiment of the present invention. The ceramic sheet laminating apparatus 100 according to the present embodiment is an apparatus suitable for manufacturing an area array type multilayer ceramic capacitor, and cuts and laminates ceramic sheets from continuous ceramic sheets. The area array type multilayer ceramic capacitor has an internal structure in which planar electrodes are laminated in multiple layers with ceramic layers interposed therebetween, and a large number of vias penetrating through the layers in the laminating direction are arranged, and the vias provide electrodes for each layer. It has a structure to connect them. An area array type multilayer ceramic capacitor having such a structure has a small inductance and is therefore suitable for use as a high-frequency electronic component.
[0019]
In FIG. 1, a ceramic sheet laminating apparatus 100 includes a feeding roller 102, a conveying roller 103, a cutting stage 104, a winding roller 106, a stacking head 108, a cutting cutter 110, a camera 112, and a stacking stage 114. , Is provided.
[0020]
Among these, the belt-shaped continuous ceramic sheet 10 is wound around the delivery roller 102. The continuous ceramic sheet 10 is formed by applying a ceramic slurry made of barium titanate or the like uniformly and thinly on a carrier film such as a PET (polyethylene terephthalate) film and drying. Further, on the surface of the continuous ceramic sheet 10, a region pattern including an electrode pattern as described later is repeatedly printed at regular intervals by screen printing or the like.
[0021]
Such a continuous ceramic sheet 10 is passed from a feed roller 102 to a take-up roller 106 via a transport roller 103 and a cutting stage 104. Then, the continuous ceramic sheet 10 is sequentially sent out from the sending-out roller 102 by the rotation of the sending-out roller 102, the conveying roller 103, and the take-up roller 106, and is conveyed in the direction of arrow a through the cutting stage 104. It is taken up by the take-up roller 106.
[0022]
On the other hand, a camera 112 is installed above the cutout stage 104, thereby reading an area pattern printed on the continuous ceramic sheet 10, a stop mark printed with the area pattern, and the like. When the position of the read stop mark has reached the stop reference position set on the cutout stage 104, the transport of the continuous ceramic sheet 10 is temporarily stopped.
[0023]
A stacking head 108 is provided above the stop reference position, and a cutting cutter 110 is provided around the stacking head 108. Above the lamination head 108, a rotation mechanism (not shown) capable of rotating the lamination head 108 about its central axis is provided.
[0024]
When the conveyance of the continuous ceramic sheet 10 is stopped, the lamination head 108 descends in the direction of the arrow b and stops on the area to be cut out. Then, based on the information on the area pattern read from the camera 112, the lamination head 108 is finely positioned, and thereafter, the cutting cutter 110 descends on the cutting stage 104 along the direction of arrow d, and the continuous ceramic sheet 10 Then, a region having a predetermined shape is cut out from the sheet, and the cut ceramic sheet thus cut out is adsorbed by the lamination head 108. Then, the adsorbed cut ceramic sheet is separated from the carrier film using the edge of the cutting stage 104. After that, the stacking head 108 moves in the direction of arrow c while adsorbing the cut ceramic sheet, and when it comes above the stacking stage 114, it moves down to the stacking stage 114 after being aligned, and the cut sheet that has been adsorbed is cut. The ceramic sheet is released, and is stacked on the cut ceramic sheet, which has been cut out, on the stacking stage 114.
[0025]
Then, the stacking head 108 is returned in the direction of the arrow b, the conveyance of the continuous ceramic sheet 10 is restarted, and the same processing is repeated thereafter. From the continuous ceramic sheet 10, a desired region is cut into a cut ceramic sheet for each region pattern. Cut out and laminated sequentially.
[0026]
B. Example of area pattern:
In this embodiment, for the area pattern to be printed on the surface of the continuous ceramic sheet 10, for example, an area pattern as shown in FIG. 2 for an area array type multilayer ceramic capacitor is used.
[0027]
FIG. 2 is an explanatory diagram showing an example of an area pattern printed on the surface of the continuous ceramic sheet 10. In FIG. 2A, the arrow e indicates the direction in which the continuous ceramic sheet 10 is conveyed.
[0028]
As shown in FIG. 2A, one area pattern 12 is configured as a set of nine electrode patterns 14.
[0029]
In the area pattern 12, each electrode pattern 14 is composed of one kind of electrode pattern, and is arranged in a matrix of 3 rows × 3 columns in a fixed area forming a rectangle. In this embodiment, the same direction as the longitudinal direction of the continuous ceramic sheet 10 (that is, the direction along the arrow e) is defined as the column direction, and the same direction as the width direction of the continuous ceramic sheet 10 is defined as the row direction.
[0030]
Here, when the area pattern 12 is rotated by 90 degrees, the arrangement of the electrode patterns 14 before the rotation is a matrix arrangement of 3 rows × 3 columns, and the arrangement of the electrode patterns 14 after the rotation is also 3 degrees. The arrangement is a matrix of rows × 3 columns. Therefore, the arrangement of the electrode patterns 14 is such that when the area pattern 12 is rotated by 90 degrees, the arrangement of the electrode patterns after the rotation overlaps the arrangement of the electrode patterns before the rotation.
[0031]
In addition, as shown in FIG. 2B, in the electrode pattern 14 of the above type, a plurality of circular windows 22 arranged in a zigzag pattern are opened in the electrode portion 20 for an area array type multilayer ceramic capacitor. It has such a pattern shape. Here, the pattern shape shown in FIG. 2B is referred to as an A pattern shape.
[0032]
As described above, by using the A pattern shape as shown in FIG. 2B as the pattern shape of the electrode pattern 14, when the electrode pattern 14 itself is rotated by 90 degrees, the pattern shape after the rotation is as shown in FIG. As shown in (c), the pattern shape is different from the A pattern shape. Here, the pattern shape shown in FIG. 2C is referred to as a B pattern shape.
[0033]
That is, the pattern shape of the electrode pattern 14 is such that when the electrode pattern 14 itself is rotated 90 degrees, the pattern shape after rotation (B pattern shape) is different from the pattern shape before rotation (A pattern shape). It has a shape.
[0034]
On the other hand, as shown in FIG. 2A, empty areas 16 are provided between the area patterns 12 in order to prevent interference at the time of clipping. Stop marks 18 are provided on both sides of each area pattern 12.
[0035]
C. Ceramic sheet cutting and laminating operation:
Next, the cutting and laminating operations of the ceramic sheet, which are characteristic parts of the present embodiment, will be described with reference to FIGS. FIG. 3 is an explanatory diagram for explaining an operation when cutting a cut ceramic sheet from the continuous ceramic sheet 10, and FIG. 4 is an explanatory diagram schematically showing a state from cutting of the ceramic sheet to lamination. 3, the upper figure is a cross-sectional view along the transport direction, and the lower figure is a plan view. In FIG. 4, (a) shows the cut-out continuous ceramic sheet 10, (b) and (c) show the cut-out cut ceramic sheets, and (d) shows each electrode pattern in the cut ceramic sheet at the time of lamination. (E) shows a laminated cut ceramic sheet, that is, a laminate.
[0036]
In the present embodiment, the first operation and the second operation described below are alternately performed for each area pattern.
[0037]
In the first operation, first, as shown in FIG. 3, the continuous ceramic sheet 10 is conveyed in the direction of arrow e, and the positions of the stop marks 18 attached to both sides of the area pattern are determined by the cutting stage indicated by arrow f. If it is detected that the stop reference position has been reached, the conveyance of the continuous ceramic sheet 10 is stopped. Then, the stacking head 108 is positioned at a reference cutting position, the cutting cutter 110 is lowered at that position, and a cutting region 30 surrounded by a dashed line including the region pattern 12 is cut from the continuous ceramic sheet 10, and FIG. The cut ceramic sheet 50 as shown in FIG. As shown in FIG. 4A, a cut mark 40 is left on the continuous ceramic sheet 10.
[0038]
Subsequently, in the first operation, the cut ceramic sheet 50 that has been cut out is conveyed to the stacking stage 114 by the stacking head 108 as described above, and after being aligned as it is, is stacked on the stacking stage 114.
[0039]
Next, the conveyance of the continuous ceramic sheet 10 is restarted, and the operation proceeds to the second operation. In this operation, similarly, when it is detected that the position of the next stop mark 18 has reached the stop reference position indicated by the arrow f, the conveyance of the continuous ceramic sheet 10 is stopped. Then, the stacking head 108 is positioned at a reference cutting position, the cutting cutter 110 is lowered at that position, and a cutting region 30 surrounded by a dashed line including the region pattern 12 is cut from the continuous ceramic sheet 10, and FIG. The cut ceramic sheet 51 as shown in FIG. As shown in FIG. 4A, a cut mark 40 is left on the continuous ceramic sheet 10.
[0040]
Subsequently, in the second operation, the cut ceramic sheet 51 cut out is carried to the stacking stage 114 by the stacking head 108, and the stacking head 108 is held above the stacking stage 114 while the cut ceramic sheet 51 is being adsorbed. 4C, the cut ceramic sheet 51 is rotated 90 degrees as shown in FIG. 4C. Then, after positioning, it is laminated on the cut ceramic sheet 50 cut out earlier. Therefore, the pattern shape of each electrode pattern on the cut ceramic sheet 51 when being laminated is as shown in FIG. 4D due to the clockwise rotation of the cut ceramic sheet 51 by 90 degrees.
[0041]
Hereinafter, similarly, the first operation and the second operation are alternately repeated for each region pattern as described above.
[0042]
Accordingly, in the first operation, the cut ceramic sheets 50 and 52 are cut out from the continuous ceramic sheet 10 as shown in FIG. 4C, and the continuous ceramic sheet 10 is cut as shown in FIG. Then, cutout marks 40 and 42 remain. Since the cut ceramic sheets 50 and 52 cut out are stacked as they are on the stacking stage 114, the pattern shape of each electrode pattern on the continuous ceramic sheet 10 is the same as shown in FIG. That is, they are stacked in the A pattern shape.
[0043]
On the other hand, in the second operation, cut ceramic sheets 51 and 53 are cut out from the continuous ceramic sheet 10 as shown in FIG. 4B, and the continuous ceramic sheet 10 is shown in FIG. Thus, the cut marks 41 and 43 remain. The cut ceramic sheets 51 and 53 thus cut out are rotated 90 degrees clockwise, and then are stacked on the stacking stage 114 as cut ceramic sheets 51 'and 53' as shown in FIG. 4C. Therefore, as shown in FIG. 4D, the layers are laminated in a pattern shape different from the pattern shape of each electrode pattern on the continuous ceramic sheet 10, that is, a B pattern shape.
[0044]
As described above, in the second operation, the cut ceramic sheets 51 and 53 cut out are rotated 90 degrees clockwise, so that the A pattern shape of the electrode pattern on the cut ceramic sheets 51 and 53 before rotation is changed after rotation. , B pattern shape. That is, when the cut ceramic sheets 51 ′ and 53 ′ after rotation are compared with the cut ceramic sheets 51 and 53 before rotation and the cut ceramic sheets 50 and 52 cut out just before, the pattern shape of the electrode pattern is A It changes from the pattern shape to the B pattern shape.
[0045]
Therefore, by alternately repeating the first operation and the second operation, the cut ceramic sheets 50 and 52 that are cut and are as they are and the cut ceramic sheets 51 and 53 that are cut and rotated by 90 degrees are aligned with each other. By alternately stacking, a stacked body as shown in FIG. 4E is obtained. In FIG. 4E, hatched electrode patterns 14 represent electrode patterns having an A pattern shape, and white electrode patterns 14 represent electrode patterns having a B pattern shape obtained by rotating the A pattern shape by 90 degrees. Shows a pattern.
[0046]
As is clear from FIG. 4 (e), the B pattern shape is arranged on the A pattern shape, and the A pattern shape is arranged on the B pattern shape. In any part of the three rows, the A pattern shape and the B pattern shape are alternately arranged in the vertical direction. Moreover, the cut ceramic sheets positioned above and below are not shifted from each other, and therefore, the end faces of the laminated body composed of these cut ceramic sheets are aligned, and almost no irregularities are formed.
[0047]
FIG. 5 is an explanatory diagram showing a positional relationship between upper and lower cut ceramic sheets in the laminate of FIG. 4 when viewed from above. As described above, by rotating the cut ceramic sheets 51, 53 cut out in the second operation by 90 degrees, the pattern shape of each electrode pattern of the cut ceramic sheets 51 ', 53' after rotation is changed one time before. Each of the cut ceramic sheets 50 and 52 has a B pattern shape which is different from the A pattern shape of the cut ceramic sheets. When these are arranged vertically and viewed from above, the upper electrode pattern At the intermediate point between the circular windows 22 arranged in a staggered pattern, the circular windows 22 arranged in a zigzag pattern of the underlying electrode pattern are arranged, and a plurality of circular windows 22 are formed as a whole. The positional relationship is arranged in a lattice.
[0048]
The laminated body obtained as described above is then pressed by a press and subjected to various steps such as degreasing and firing, whereby a total of nine laminated ceramic capacitors are manufactured at one time. That is, it is possible to manufacture a multilayer ceramic capacitor in which electrodes having an A-pattern shape and electrodes having a B-pattern shape are alternately stacked via ceramic layers as internal structures.
[0049]
D. Effects of the embodiment:
As described above, in the present embodiment, the first operation and the second operation are alternately repeated to cut out the cut ceramic sheet as it is, and cut out the cut ceramic sheet rotated by 90 degrees. They are alternately stacked. In other words, in other words, the cut ceramic sheet that has been cut out is stacked so that it is rotated by 90 degrees relative to the cut ceramic sheet that has been cut out and stacked last time. Thus, in this embodiment, the B pattern shape can be arranged on the A pattern shape, and the A pattern shape can be arranged on the B pattern shape. It is possible to obtain a multilayer ceramic capacitor in which electrodes having a B shape and electrodes having a B pattern are alternately stacked via ceramic layers.
[0050]
Moreover, when laminating the ceramic sheets, they are only rotated by 90 degrees relative to one another, and are not shifted in the lamination position, so that the end face of the laminated body composed of the laminated ceramic sheets is As shown in FIG. 4 (e), they are aligned and almost no irregularities are formed.
[0051]
Therefore, when such a laminate is pressed by a press after lamination, the end faces of the laminate are aligned, so that the entire end face is restricted by the mold, and the end portion is not deformed.
[0052]
This will be described in detail with reference to FIG. 6 in comparison with the above-mentioned proposed example. FIG. 6 is an explanatory diagram showing a state of pressing the laminated body by pressing in comparison with the case of the already proposed example and the case of the present embodiment. In FIG. 6, (a) is the case of the already proposed example, and (b) is the case of the present embodiment.
[0053]
As described above, in the already-proposed example, since the laminating position is shifted when laminating the cut ceramic sheets 60, as shown in FIG. 6A, the end faces of the laminated body 62 are not aligned and unevenness is formed. turn into. When press-bonding with a press, the laminated body 62 is pressed in a state in which the end face is regulated by the mold 64. Free and unregulated. Therefore, if a high temperature and a high pressure are applied to the laminate 62 at the time of press bonding as it is, the concave portion extends in the direction of the arrow, and the end of the laminate 62 is deformed.
[0054]
On the other hand, in the present embodiment, since the laminating position is not shifted when laminating the cut ceramic sheets 60, as shown in FIG. Absent. Therefore, since the end face of the laminated body 62 is entirely regulated by the mold 64, the end of the laminated body 62 is not deformed even when high temperature and high pressure are applied to the laminated body 62 during press bonding.
[0055]
Further, in the already-proposed example, the following problem may occur due to shifting the lamination position of the cut ceramic sheet. That is, when laminating the cut ceramic sheets by the lamination head 108, usually, the pressure is applied by the lamination head 108 so that the lamination of the cut ceramic sheets does not move each time the lamination is performed. The end portion is partially floated due to the displacement of the lamination position, and an unpressurized region occurs. For this reason, when pressurizing, the central axis of pressurization (the axis parallel to the pressurizing direction and passing through the center of the laminating head 108: a mechanical axis for transmitting a force to the laminating head or a frame holding the laminating stage 114) is In order to press evenly, it is necessary to be completely perpendicular to the cut ceramic sheet (accurately, the lamination stage 114). There is a possibility that the central axis is inclined, and if the axis is inclined, the position naturally changes, so that the accuracy is not obtained.
[0056]
On the other hand, in the present embodiment, since the laminating position of the cut ceramic sheet is not shifted during lamination, the entire sheet can be uniformly pressed without tilting the pressing center axis.
[0057]
In addition, as other conventional methods other than the already proposed example, for example, a continuous ceramic sheet on which an area pattern formed by arranging only the A pattern electrode pattern and a B pattern electrode electrode only are arranged. And a continuous ceramic sheet having an area pattern printed thereon, prepared by using a ceramic sheet laminating apparatus having two cutout portions as described in JP-A-10-71611. From one continuous ceramic sheet, alternately, a region including the region pattern is cut out, a cut ceramic sheet having a different electrode pattern is obtained, and a method of stacking the cut ceramic sheets without shifting the stacking position is also conceivable. In such a method, the cut ceramic sheets are separated from different continuous ceramic sheets. To become the cutting Re respectively, with the positioning error at the time of stacking is increased, the structure of the ceramic sheet lamination apparatus itself becomes large, and expensive cost of the apparatus. On the other hand, in this embodiment, since the cut ceramic sheet is cut out from one continuous ceramic sheet, the positioning error at the time of lamination is small, and the ceramic sheet laminating apparatus itself has only one cut-out portion. The scale is small and the cost of the apparatus is low.
[0058]
F. Modification:
The present invention is not limited to the above-described examples and embodiments, and can be implemented in various modes without departing from the gist thereof.
[0059]
In the above-described embodiment, a case where an area array type multilayer ceramic capacitor is manufactured as a multilayer ceramic electronic component will be described. Therefore, the electrode pattern 14 in the region pattern 12 has a pattern shape as shown in FIG. It was. However, the present invention is not limited to this, and can be applied to the case of manufacturing another multilayer ceramic electronic component. In this case, the following pattern shape is used.
[0060]
For example, when manufacturing a multilayer ceramic inductor instead of a multilayer ceramic capacitor as a multilayer ceramic electronic component, the pattern shape of the electrode pattern is, for example, a pattern shape as shown in FIG. 7A or 8A. Use it. 7 and 8 are explanatory views showing the pattern shapes of the electrode patterns for the multilayer ceramic inductor.
[0061]
When a pattern shape as shown in FIG. 7A is used as the pattern shape of the electrode pattern, when the electrode pattern itself is rotated by 90 degrees, the pattern shape after rotation becomes a pattern as shown in FIG. Shape. Here, the pattern shape before rotation is called an A pattern shape, and the pattern shape after rotation is called a B pattern shape.
[0062]
That is, similarly to the pattern shape shown in FIG. 2B, when the electrode pattern itself is rotated by 90 degrees, the pattern shape shown in FIG. The pattern shape is different from the pattern shape before rotation (A pattern shape).
[0063]
Therefore, also in the case of laminating the cut ceramic sheets cut out from the continuous ceramic sheet 10, similarly to the above, the cut ceramic sheet is rotated by 90 degrees relative to the cut ceramic sheet cut out and stacked last time. By laminating the electrodes, it is possible to alternately laminate the A-patterned electrodes and the B-patterned electrodes, and the laminated electrodes 23 form a coil as a whole.
[0064]
When a pattern shape as shown in FIG. 8A is used as the pattern shape of the electrode pattern, when the electrode pattern itself is rotated by 180 degrees, the pattern shape after the rotation is as shown in FIG. 8B. It becomes a pattern shape. Here, the pattern shape before rotation is called an A pattern shape, and the pattern shape after rotation is called a B pattern shape.
[0065]
That is, the pattern shape shown in FIG. 8A is such that, when the electrode pattern itself is rotated by 180 degrees, the pattern shape after rotation (B pattern shape) is different from the pattern shape before rotation (A pattern shape). Pattern shape.
[0066]
Therefore, when laminating cut ceramic sheets cut out from the continuous ceramic sheet 10, the cut ceramic sheets are stacked so that they are rotated by 180 degrees relative to the cut ceramic sheet cut out and stacked last time. It becomes possible to alternately laminate the A-patterned electrodes and the B-patterned electrodes.
[0067]
In this way, when the A-pattern-shaped electrodes and the B-pattern-shaped electrodes are alternately stacked, one end of the electrode 24 is electrically connected to one end of the lower electrode through the via 26, and the other end of the electrode 24 is connected to the other end of the lower electrode. The ends are electrically connected to one end of the upper layer electrode via the upper layer via. As a result, the stacked electrodes form a coil as a whole.
[0068]
In the above-described embodiment, in the area pattern 12, each electrode pattern 14 is configured by one type of electrode pattern, and is arranged in a matrix of 3 rows × 3 columns in a fixed area forming a rectangle. The present invention is not limited to this.
[0069]
FIG. 9 is an explanatory diagram showing an example in which two types of electrode patterns are arranged in a 4 × 4 matrix in a region pattern. For example, as shown in FIG. 9, the electrode pattern is composed of two types of electrode patterns, an electrode pattern having an A pattern shape and an electrode pattern having a B pattern shape, and these electrode patterns are arranged in a matrix of 4 rows × 4 rows. It may be arranged in a shape.
[0070]
In the example shown in FIG. 9A, for example, a pattern shape as shown in FIG. 2B or FIG. 7A is used as the A pattern shape, and a pattern shape as shown in FIG. By using the pattern shape as shown in (b), in the second operation, when the cut ceramic sheets cut out are rotated by 90 degrees and stacked, the electrode pattern of the A pattern shape is rotated by 90 degrees. Although it will move to the position where the electrode pattern of another A pattern shape was, it changes from the A pattern shape to the B pattern shape during the 90-degree rotation. The B-shaped electrode pattern is laminated on the A-shaped electrode pattern. Similarly, the B-patterned electrode pattern is also moved to a position where another B-patterned electrode pattern is located by the 90-degree rotation. Since the shape changes from the shape to the A-pattern shape, in the case of lamination, the A-pattern-shaped electrode pattern is laminated on the B-pattern-shaped electrode pattern previously laminated.
[0071]
On the other hand, in the example shown in FIG. 9B, for example, a pattern shape as shown in FIG. 8A is used as the A pattern shape, and a pattern shape as shown in FIG. By using this, in the second operation, when the cut ceramic sheets thus cut out are stacked by rotating them by 180 degrees, the electrode pattern of the A pattern shape is rotated by 180 degrees so as to match the electrode pattern of another A pattern shape. However, during rotation by 180 degrees, the pattern changes from the A pattern shape to the B pattern shape. , B pattern-shaped electrode pattern. Similarly, the B-patterned electrode pattern is also moved to a position where another B-patterned electrode pattern is located by the 180-degree rotation. Since the shape changes from the shape to the A-pattern shape, in the case of lamination, the A-pattern-shaped electrode pattern is laminated on the B-pattern-shaped electrode pattern previously laminated.
[0072]
Further, in the above-described modified example, in the region pattern, each electrode pattern is configured by two types of electrode patterns, but may be configured by three or more types of electrode patterns.
[0073]
FIG. 10 is an explanatory diagram showing an example in which four types of electrode patterns are arranged in a 4 × 4 matrix in the area pattern. For example, as shown in FIG. 10A, the electrode patterns are an electrode pattern having an A pattern shape, an electrode pattern having a B pattern shape, an electrode pattern having a C pattern shape, and an electrode pattern having a D pattern shape. In the case of using four types of electrode patterns, these electrode patterns may be arranged in a 4 × 4 matrix as shown in FIG. 10B.
[0074]
In this example, in the case of an electrode pattern having an A pattern shape, as shown in FIG. 10A, when the electrode pattern itself is rotated by 90 degrees, the pattern shape after rotation becomes a B pattern shape, and when the electrode pattern is rotated by 180 degrees. , C pattern shape, and when rotated by -90 degrees, it becomes a D pattern shape. The electrode patterns having other pattern shapes (that is, the B pattern shape, the C pattern shape, and the D pattern shape) also change as shown in FIG. 10A by rotating the electrode pattern itself.
[0075]
In the case of this example, in the first operation, the cut-out cut ceramic sheets are laminated as they are, in the second operation, the cut-out cut ceramic sheets are rotated by 90 degrees clockwise and laminated, and in the third operation, In the fourth operation, the cut ceramic sheets that have been cut out are rotated by 180 degrees clockwise and laminated, and in the fourth operation, the cut ceramic sheets that are cut out are rotated by 90 degrees clockwise (that is, 90 degrees clockwise) and laminated. These operations are repeated.
[0076]
Therefore, for example, focusing on the A-patterned electrode pattern, in the second operation, when the cut ceramic sheets cut out are stacked by rotating them by 90 degrees, the A-patterned electrode patterns are separately rotated by 90 degrees. Will move to the position where the electrode pattern of the A pattern shape was located. However, during the 90-degree rotation, the pattern changes from the A pattern shape to the B pattern shape. The B-shaped electrode pattern is laminated on the A-shaped electrode pattern. Also, in the third operation, when the cut ceramic sheets thus cut out are stacked by rotating them by 180 degrees, the cut ceramic sheets are moved to a position where there is still another A-pattern electrode pattern by the rotation of 180 degrees. Since the pattern changes from the pattern A to the pattern C during the rotation by 180 degrees, the electrode pattern of the pattern C is formed on the electrode pattern of the pattern B which was previously laminated. Will be laminated. Further, in the fourth operation, even when the cut ceramic sheet thus cut out is laminated by rotating it by -90 degrees, it is possible to move the cut ceramic sheet to a position where another electrode pattern having the A-pattern shape was present by the rotation of -90 degrees. However, since the shape changes from the A pattern shape to the D pattern shape during the rotation of −90 degrees, the D pattern shape electrode is placed on the C pattern shape electrode pattern laminated last time during lamination. It will be laminated as a pattern.
[0077]
Such an operation is the same for an electrode pattern having another pattern shape (that is, a B pattern shape, a C pattern shape, or a D pattern shape).
[0078]
Therefore, a B-pattern electrode pattern is formed on the A-pattern electrode pattern, a C-pattern electrode pattern is formed on the B-pattern electrode pattern, and a D-pattern electrode pattern is formed on the C-pattern electrode. However, it is possible to manufacture a laminated electronic component in which an A-pattern electrode pattern is sequentially and repeatedly laminated on a D-pattern electrode.
[0079]
In the above-described embodiments and modified examples, the pattern shapes of the electrode patterns were all rotationally symmetric, but they were not necessarily required to be rotationally symmetric, and at least the electrode patterns themselves were rotated by a predetermined angle. In this case, any pattern shape may be used as long as the pattern shape after rotation is different from the pattern shape before rotation.
[0080]
In the above-described embodiment and modified examples, it has been described that one region pattern 12 includes a total of 9 electrode patterns in 3 rows × 3 columns or a total of 16 electrode patterns in 4 rows × 4 columns. However, when the cut ceramic sheets are rotated by 90 degrees during lamination, an electrode pattern of R rows × R columns (where R is an integer of 2 or more) may be arranged. On the other hand, in the case of rotating by 180 degrees, an electrode pattern of P rows × Q rows (where P and Q are each an integer of 2 or more) may be arranged.
[0081]
In the above-described embodiment, when laminating the cut ceramic sheets, the laminating head 108 that adsorbs the cut ceramic sheets is rotated. However, a rotating mechanism is provided below the laminating stage 114, and the laminating stage 114 is provided. May be rotated, or a rotation mechanism may be provided above the lamination head 108 and below the lamination stage 114 to rotate both the lamination head 108 and the lamination stage 114. That is, the cut ceramic sheet to be stacked only needs to rotate by a predetermined angle relative to the cut ceramic sheet stacked last time.
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing a ceramic sheet laminating apparatus as one embodiment of the present invention.
FIG. 2 is an explanatory diagram showing an example of an area pattern printed on the surface of a continuous ceramic sheet 10.
FIG. 3 is an explanatory diagram for explaining an operation when cutting a cut ceramic sheet from a continuous ceramic sheet 10.
FIG. 4 is an explanatory view schematically showing a state from cutting of a ceramic sheet to lamination.
5 is an explanatory diagram showing a positional relationship between upper and lower cut ceramic sheets in the laminate of FIG. 4 as viewed from above.
FIG. 6 is an explanatory diagram showing a state of pressing a laminated body by a press in a case of a proposed example and a case of an example of the present invention in comparison.
FIG. 7 is an explanatory diagram showing a pattern shape of an electrode pattern for a multilayer ceramic inductor.
FIG. 8 is an explanatory diagram showing a pattern shape of an electrode pattern for a multilayer ceramic inductor.
FIG. 9 is an explanatory diagram showing an example in which two types of electrode patterns are arranged in a 4 × 4 matrix in a region pattern.
FIG. 10 is an explanatory diagram showing an example in which four types of electrode patterns are arranged in a 4 × 4 matrix in a region pattern.
[Explanation of symbols]
10 Continuous ceramic sheet
12 ... Area pattern
14 ... Electrode pattern
16: Free space
18. Stop mark
20 ... Electrode part
22 ... Circular window
23 ... electrode
24 ... electrode
26 ... Via
30 ... cutout area
40-43 ... cutting trace
50-53 ... cut ceramic sheet
60 ... cut ceramic sheet
62 ... Laminate
64 ... type
100 ... ceramic sheet laminating device
102: Delivery roller
103 ... Conveying roller
104… Cutout stage
106 ... take-up roller
108 ... Laminated head
110 ... cutter
112… Camera
114 ... Lamination stage

Claims (3)

A method for manufacturing a multilayer ceramic electronic component, comprising:
(A) preparing a band-shaped continuous ceramic sheet on which the same region pattern is repeatedly printed in the longitudinal direction;
(B) a step of sequentially cutting out, from the continuous ceramic sheet, a region having a certain shape including the region pattern for each region pattern to obtain a cut ceramic sheet;
(C) sequentially laminating the cut out ceramic sheets;
With
The area pattern is formed by arranging a plurality of one or more types of electrode patterns in a predetermined area,
In the region pattern, the arrangement of each electrode pattern is such that, when the region pattern is rotated by a predetermined angle, the arrangement of each electrode pattern after rotation overlaps the arrangement of each electrode pattern before rotation. And
The pattern shape of the electrode pattern is such that, when the electrode pattern itself is rotated by the predetermined angle, the pattern shape after rotation is different from the pattern shape before rotation,
The shape of the region to be cut out in the step (b) is such that, when the region is rotated by the predetermined angle, the region shape before rotation matches the region shape after rotation,
In the step (c), the cut ceramic sheet is stacked so that the cut ceramic sheet is rotated by the predetermined angle relative to the cut ceramic sheet cut and stacked last time. . The method for manufacturing a multilayer ceramic electronic component according to claim 1,
The method according to claim 1, wherein the predetermined angle is one of approximately 90 degrees and approximately 180 degrees. A ceramic sheet laminating apparatus for cutting and laminating a ceramic sheet to produce a laminated ceramic electronic component,
A belt-shaped continuous ceramic sheet in which the same area pattern is repeatedly printed in the longitudinal direction, a transport unit that transports the longitudinal direction,
From the continuous ceramic sheet, for each region pattern, sequentially cut out a region of a certain shape including the region pattern, a cutout portion to obtain a cut ceramic sheet,
A lamination portion for sequentially laminating the cut ceramic sheets,
With
The area pattern is formed by arranging a plurality of one or more types of electrode patterns in a predetermined area,
In the region pattern, the arrangement of each electrode pattern is such that, when the region pattern is rotated by a predetermined angle, the arrangement of each electrode pattern after rotation overlaps the arrangement of each electrode pattern before rotation. And
The pattern shape of the electrode pattern is such that, when the electrode pattern itself is rotated by the predetermined angle, the pattern shape after rotation is different from the pattern shape before rotation,
The shape of the region cut out by the cutout portion is a shape such that, when the region is rotated by the predetermined angle, the region shape before rotation matches the region shape after rotation,
The said laminated part is laminated | stacked so that the cut | disconnected cut ceramic sheet may rotate by the said predetermined angle relatively with respect to the cut ceramic sheet cut and laminated | stacked last time, The ceramic sheet lamination apparatus characterized by the above-mentioned.

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