JP2015220273A - Method of manufacturing multilayer ceramic electronic component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of manufacturing a multilayer ceramic electronic component that can divide a mother ceramic laminate into individual pieces with securing high form accuracy.SOLUTION: In a method of manufacturing a multilayer ceramic component that is manufactured through a dividing step of dividing a mother ceramic laminate 20 into individual elements 1, (a) the mother ceramic laminate is provided with an end face exposing mark 13 exposed to a side surface 20a of the mother ceramic laminate and a dividing mark 14 which is cut on the basis of the end face exposing mark to be exposed to a cut end face 20b, and (b) the dividing step comprises a step of cutting the mother ceramic laminate on the basis of the end face exposing mark to expose a dividing mark to the cut end face of the mother ceramic laminate, a step of imaging the dividing mark exposed to the cut end face by imaging means, a step of cutting the mother ceramic laminate on the basis of the imaged dividing mark, and then a step of dividing into plural multilayer ceramic electronic component elements as individual pieces.

Description

  The present invention relates to a method for manufacturing a multilayer ceramic electronic component, and more specifically, a step of cutting a mother ceramic multilayer body, which is a multilayer body of a plurality of ceramic layers, at predetermined positions and dividing it into individual multilayer ceramic electronic component elements. The present invention relates to a method for manufacturing a multilayer ceramic electronic component manufactured through the manufacturing process.

  As a method of manufacturing a multilayer ceramic capacitor which is one of typical multilayer ceramic electronic components, a mother ceramic multilayer body (mother multilayer body) which is an aggregate in which a plurality of ceramic multilayer bodies are arranged in a matrix is cut. A method of manufacturing a multilayer ceramic capacitor through a process of dividing into individual elements is widely known.

  Then, in the step of cutting the mother ceramic laminate, which is an aggregate in which a plurality of ceramic laminates are arranged in a matrix, and dividing it into individual ceramic laminates, the peripheral area of the mother ceramic laminate is cut and separated. A method is widely known in which the mother ceramic laminate is cut and divided into individual ceramic laminates while imaging the internal conductor exposed from the cut end face of the mother ceramic laminate as a positioning mark.

  Further, as a cutting device used for cutting the mother ceramic laminate by the above-described method, for example, as shown in FIG. 13, on a table 110 that can be slid in the X-axis direction by a feed mechanism 115. When cutting the green sheet (mother ceramic laminate) G by lowering the cutting blade 113 vertically with respect to the held green sheet (mother ceramic laminate) G, the table 110 is moved in a direction perpendicular to the blade surface. A free cutting device has been proposed (see Patent Document 1).

  In this cutting apparatus, a guide 112 protrudes from the upper surface of the table 110, and one side edge of the green sheet (mother ceramic laminate) G placed on the table 110 is brought into contact with the guide 112. By doing so, the green sheet (mother ceramic laminate) G is positioned.

  When the green sheet (mother ceramic laminate) G is cut using this cutting device, the green sheet (mother ceramic laminate) G can be cut at an intended predetermined position.

  However, in recent years, as the ceramic ceramic capacitor has become smaller or thinner, the thickness of the mother ceramic multilayer body has also decreased, and the rigidity of the mother ceramic multilayer body has decreased as compared with the case where the thickness is thicker than before. The following problems have occurred.

  (A) Since the rigidity of the mother ceramic laminate is low, for example, for positioning, the side surface of the mother ceramic laminate placed on the stage is pushed and moved (slid) on the stage. When one side edge is brought into contact with the guide, the mother ceramic laminate is deformed before the mother ceramic laminate slides on the stage.

  (B) When the thickness of the mother ceramic laminate is thin, the rate of variation in the height position of the mother ceramic laminate when attached to the mount (filter paper) is larger than when the thickness of the mother ceramic laminate is thick. Therefore, it is difficult to stably press the side surface of the mother ceramic laminate, and the position cannot be adjusted with high accuracy.

  (C) Due to the circumstances as described in (a) and (b) above, it is necessary to increase the margin (disposal allowance) of the mother ceramic laminate or to provide a long positioning mark. However, it is difficult to increase the ratio of the number of individual multilayer ceramic capacitors.

  (D) When imaging means such as a camera is arranged on the side surface of the mother ceramic laminate to image a mark indicating a cutting position, and the mother ceramic laminate is cut based on the position of the mark, the mother If both sides of the ceramic laminate are not parallel, the imaging means will not be in focus during imaging, and it will be difficult to cut the mother ceramic laminate with high positional accuracy. Every time it doesn't fit, the equipment stops in trouble and productivity decreases.

  (E) The shape accuracy of the ceramic laminate obtained by cutting the mother ceramic laminate into individual pieces is reduced. The deterioration of the shape accuracy is caused by the deterioration of the electrical characteristics of the product and the unstable mounting posture. Invite them.

Japanese Patent Application Laid-Open No. 11-90894

  The present invention solves the above-described problem, and can efficiently cut a mother ceramic multilayer body at a predetermined position and divide the mother ceramic multilayer body into pieces with high shape accuracy, thereby efficiently producing a multilayer ceramic electronic component. An object of the present invention is to provide a method for manufacturing a multilayer ceramic electronic component capable of achieving the above.

In order to solve the above problems, a method for producing a multilayer ceramic electronic component of the present invention includes
A method for manufacturing a multilayer ceramic electronic component manufactured through a dividing step of cutting a mother ceramic multilayer body including a plurality of laminated ceramic layers at a predetermined position and dividing it into individual multilayer ceramic electronic component elements. And
(A) The mother ceramic laminate includes an end face exposure mark exposed on a side surface and a division mark exposed on a cut end face formed by cutting the mother ceramic laminate based on the end face exposure mark. Has
(B) The dividing step includes a step of cutting the mother ceramic laminate on the basis of the end face mark and exposing the division mark on the cut end surface of the mother ceramic laminate, and exposing the cut end surface. Imaging the division mark by an imaging means, and cutting the mother ceramic laminate on the basis of the imaged division mark and dividing the multilayer ceramic electronic component element into a plurality of pieces. It is characterized by this.

  Further, in the method for manufacturing a multilayer ceramic electronic component of the present invention, a plurality of ceramic green sheets having an inner conductor pattern for an end face exposure mark reaching the outer peripheral edge are laminated, whereby the end face protrusion is performed in the thickness direction. It is preferable that the end surface marking mark in which the inner conductor pattern for the mark is arranged is formed on the side surface of the mother ceramic laminate.

  By providing the above-described configuration, it is possible to reliably form a mother ceramic laminate having end recognition marks that are easy to recognize on the side surfaces, and the present invention can be more effectively realized.

  Further, the step of forming the mother ceramic laminate includes a punching step of punching a long ceramic green sheet into a rectangular shape, and a stacking step of stacking the punched rectangular ceramic green sheet, In the punching step, the long conductor green sheet is punched out so that the end conductor mark internal conductor pattern is cut, so that the end conductor mark inner conductor pattern reaching the outer peripheral edge is formed. It is desirable that the ceramic green sheet be constructed.

  In the punching process of punching a long ceramic green sheet into a rectangular shape, by punching the long ceramic green sheet so as to cut the internal conductor pattern for the end face marking, the end surface reaches the outer peripheral edge. It becomes possible to reliably and efficiently obtain a rectangular ceramic green sheet on which an internal conductor pattern for a lead mark is formed, and the present invention can be further improved.

  Moreover, it is preferable that the end surface marking mark is exposed on both opposite side surfaces of the mother ceramic laminate.

  By providing the above-described configuration, it is possible to obtain a mother ceramic laminated body that can easily recognize the end face marking mark.

  Further, a pair of end face protruding marks are disposed at a predetermined interval in a direction along the main surface of the mother ceramic multilayer body, wherein one end surface marking mark is exposed on the side surface of the mother ceramic multilayer body. It is preferable that the position between the pair of end surface marking marks is recognized as a cutting position.

  By providing the said structure, it becomes possible to raise the precision of a cutting position and is meaningful.

  One of the pair of end face projection marks is a mark formed from an exposed portion of a plurality of layers of internal electrode patterns stacked via a ceramic layer and extending in the stacking direction, and the other is positioned via a ceramic layer. It is preferable that the mark is formed from an exposed portion of a plurality of stacked internal electrode patterns, and extends in the stacking direction in parallel with the one end face projection mark.

  By providing the above configuration, it is possible to obtain a mother ceramic laminate capable of reliably recognizing the end-facing mark from the side surface side, and the present invention can be further effectively realized.

  In the method for manufacturing a multilayer ceramic electronic component according to the present invention, (a) a mother ceramic laminate is formed by cutting the mother ceramic laminate on the basis of the end face exposure mark exposed on the side surface and the end face exposure mark. (B) In the dividing step, the mother ceramic laminate is cut based on the end face marking mark to expose the division marks on the cut end surface of the mother ceramic laminate. A step of imaging the division mark exposed on the cut end face by an imaging means, and a step of cutting the mother ceramic laminate based on the imaged division mark to divide the multilayer ceramic electronic component element as a plurality of pieces; Therefore, the mother ceramic laminate is accurately cut, and the division marks are exposed on the cut end face. More, it is possible to recognize the position reliably. Further, a multilayer ceramic electronic component element that is a plurality of individual pieces can be efficiently obtained by performing a process of reliably cutting the mother ceramic multilayer body at a predetermined position on the basis of the recognized division mark.

  That is, according to the present invention, it becomes possible to cut the mother ceramic laminated body with high accuracy without applying a guide to the side surface, and the division mark exposed on the end face is caused to be out of focus by the imaging means. The mother ceramic laminated body can be separated into pieces by cutting and recognizing without being cut and cutting based on the recognized division marks. As a result, it is possible to obtain a multilayer ceramic electronic component element with high shape accuracy and dimensional accuracy.

  In addition, the manufacturing method of the multilayer ceramic electronic component of the present invention recognizes the division mark exposed on the cut end face by cutting and only cuts the mother ceramic multilayer body into pieces based on the recognition mark. Instead, the mother ceramic laminate with the division marks exposed on the cut end face obtained by cutting is cut with reference to the division marks to make a half piece including a plurality of pieces, and then exposed. A configuration including a process of cutting a half piece into individual pieces using the internal electrode as a reference is included.

In one Embodiment (Embodiment 1) of this invention, it is a top view which shows the structure of the elongate ceramic green sheet used in manufacturing a multilayer ceramic capacitor. It is a perspective view which shows the mother ceramic green sheet cut out from the elongate ceramic green sheet of FIG. It is a disassembled perspective view which shows the structure of the mother ceramic laminated body formed through the process of laminating | stacking the mother ceramic green sheet of FIG. It is front sectional drawing which shows the structure of the mother ceramic laminated body produced in Embodiment 1 of this invention. It is a figure which shows the mark for an end face exposure exposed to the side surface of the mother ceramic laminated body produced in Embodiment 1 of this invention. It is a figure explaining the method of cutting the mother ceramic laminated body of FIG. 5 on the basis of the mark for end faces. In Embodiment 1 of this invention, it is a figure which shows the state in which the division | segmentation mark was exposed to the cutting | disconnection end surface by cutting a mother ceramic laminated body on the basis of the mark for end faces. In Embodiment 1 of this invention, it is a top view which shows the state which has cut the mother ceramic laminated body on the basis of the division | segmentation mark. In Embodiment 1 of this invention, it is a top view which shows the state which has cut the mother ceramic laminated body after cutting on the basis of a division | segmentation mark in the direction orthogonal to a cutting end surface. In Embodiment 1 of this invention, it is front sectional drawing which shows the structure of the piece (multilayer ceramic capacitor | condenser element) obtained by cutting a mother ceramic laminated body. It is front sectional drawing which shows the multilayer ceramic capacitor manufactured by the manufacturing method of the multilayer ceramic electronic component concerning Embodiment 1 of this invention. In other embodiment (Embodiment 2) of this invention, it is a top view which shows the structure of the elongate ceramic green sheet used for manufacturing a multilayer ceramic capacitor. It is a perspective view which shows the structure of the cutting device of the conventional ceramic green sheet.

  Embodiments of the present invention will be described below to describe the features of the present invention in more detail.

[Embodiment 1]
In the first embodiment, as shown in FIG. 11, a ceramic laminated body (multilayer ceramic capacitor element) including internal electrodes 2 (2a, 2b) for forming capacitance and dummy internal electrodes 6 (6a, 6b). 1, external electrodes 5 (5a, 5b) are disposed on end surfaces 3 (3a, 3b) from which the internal electrodes 2 (2a, 2b) are drawn out so as to be electrically connected to the internal electrodes 2 (2a, 2b). An example of manufacturing a multilayer ceramic capacitor having the above structure will be described.

  (1) First, a raw material in which a dielectric ceramic powder (for example, barium titanate ceramic powder), a binder resin, and an organic solvent are blended is formed on a sheet, and a long ceramic green sheet 10 (FIG. 1) is formed. Produced.

  The long ceramic green sheet 10 is obtained by cutting (punching) each mother ceramic green sheet 11 therefrom.

Then, by printing a conductive paste on each region of the long ceramic green sheet 10 to be the mother ceramic green sheets 11, a plurality of internal electrodes having a predetermined shape (as shown in FIG. 1) An internal electrode pattern) 12, an end face marking mark 13, and a division mark 14 were formed.
In this embodiment, since the internal electrode 12, the edge marking mark 13, and the division mark 14 are printed at the same time, each mark can be formed without providing a special process. The relative position accuracy between the marks can be increased.

  The internal electrodes 12 are usually printed so as to have a grid-like or staggered arrangement (FIG. 1 shows a state in which the internal electrodes 12 are formed in a grid).

  In the first embodiment, each end face projection mark 13 is composed of two linear marks 13a and 13b as shown in FIGS. And it is comprised so that the position between the two linear marks 13a and 13b may become a cutting position.

The end surface mark 13 is divided into a cut end surface 20b (FIG. 7) of the mother ceramic laminate 20 by cutting a mother ceramic laminate 20 (FIGS. 3 and 4), which will be described later, with reference to the end face mark 13 as a reference. An aspect in which adjacent end face projection marks 13 sandwich a plurality of division marks 14 when viewed in the longitudinal direction of the long ceramic green sheet 10 so that the marks 14 can be exposed, that is, end faces By performing a cut with reference to the delivery mark 13, the division mark 14 is cut and printed in such a manner as to be exposed on the cut end face 20b (FIG. 7).
Further, in the first embodiment, the end surface marking marks 13 are disposed on both the upper side and the lower side of the long ceramic green sheet 10 of FIG. 1, but depending on the case, the upper side and the lower side may be provided. It is also possible to configure so as to be disposed only on either one side.

  The division mark 14 recognizes the position of the mother ceramic laminate 20 to be cut so that the mother ceramic laminate 20 (FIGS. 3 and 4), which will be described later, can be cut at a predetermined position and divided. It is printed at a position where you can. In addition, the division mark 14 in this Embodiment 1 can show the position where the surface where the internal electrode of a ceramic laminated body is pulled out becomes a cut end surface by cutting the mother ceramic laminated body 20 formed after that. Further, they are arranged at predetermined positions at predetermined pitches. Specifically, in the first embodiment, the division marks 14 are arranged on the upper side and the lower side of the long ceramic green sheet 10 in FIG. 1 so as to face each other. However, it may be configured to be disposed only on either the upper side or the lower side. In that case, the end surface marking marks 13 may also be disposed on the upper and lower sides of the long ceramic green sheet 10 on the side where the division marks 14 are disposed.

The division mark 14 may be arranged at each cutting position for each individual piece, but may be arranged at a ratio (at a predetermined pitch) for each of a plurality of pieces. In the first embodiment, the division marks 14 are arranged at a ratio of one for a plurality of pieces.
Further, the main cutting mark 14 is not limited to a single line-like pattern, but may be a plurality of lines or combs, but it is usually desirable to use a single line pattern.

(2) Then, the above-mentioned long ceramic green sheet 10 was cut at the position indicated by the dotted line L1 in FIG. 1, and each mother ceramic green sheet 11 having a square planar shape was cut out as shown in FIG. .
In the first embodiment, the end surface marking mark 13 is cut in a direction perpendicular to the longitudinal direction at a position midway from one end to the other end.

  However, when the long ceramic green sheet 10 is cut, the internal electrode 12 and the division mark 14 may be cut at a position where they are cut or may be cut at a position where they are not cut. That is, the mother ceramic laminated body 20 (see FIGS. 3 and 4) formed thereafter is cut at a predetermined position based on the end face mark 13 to expose the division marks 14 on the cut end face 20b (FIG. 7). Based on this, as will be described later, the mother ceramic laminate 20 can be cut at a predetermined position (FIG. 8).

  In addition, there is no restriction | limiting in particular in the method of cutting out each mother ceramic green sheet 11 from the elongate ceramic green sheet 10, For example, the method of hold | maintaining the elongate mother ceramic sheet 10 by adsorption | suction, and cutting a periphery part with a cutter, or a type | mold is used. Various methods such as a punching method can be applied.

(3) Next, the cut out mother ceramic green sheets (electrode printing sheets) 11 were laminated in a predetermined order (see FIG. 3).
At this time, a mother ceramic green sheet 11 (11a) having no internal electrode pattern, which is an outer layer portion of the multilayer ceramic capacitor, was laminated on the upper and lower surfaces of the multilayer body.

  In the first embodiment, the internal electrode 2 is drawn to different end faces of the ceramic multilayer body (multilayer ceramic capacitor element) 1 (FIG. 10) using one kind of mother ceramic green sheet (electrode printing sheet) 11. In order to realize the basic structure of the multilayer ceramic capacitor, as shown in FIGS. 3 and 4, the position of the internal electrode 2 is indicated by an arrow A in the mother ceramic green sheet 11 adjacent in the stacking direction. , B, the mother ceramic green sheets 11 were laminated so as to be shifted from each other in the direction indicated by B.

  In addition, as a method of shifting the position of the internal electrode 2 so that the position of the internal electrode 2 is shifted from each other in the mother ceramic green sheet 11 adjacent in the stacking direction as described above, from the long ceramic green sheet 10, After the mother ceramic green sheet 11 having the same internal electrode 2 position is cut out, the stacking position is shifted (the method of the first embodiment), and the long ceramic green sheet 10 is used to position the internal electrode 2 at the same position. There is a method in which two different types of mother ceramic green sheets 11 are cut out and then the cut out mother ceramic green sheets 11 are alternately stacked at the same position. Either method may be used.

  However, as in the latter case, two types of mother ceramic green sheets are prepared in which the positions of the internal electrodes 2 are made different while the positions of the end face-up marks are the same, and the end face-up marks overlap each other. When the two types of mother ceramic green sheets are laminated alternately to form a mother ceramic laminate so that they are in the same position in plan view, the end face marking mark is placed on the side of the mother ceramic laminate. Since it can be recognized as a single linear mark along the stacking direction, it is easy to recognize the cutting position, which is preferable.

(4) Then, the mother ceramic laminated body (block after lamination) 20 is pressure-bonded by a method such as hydrostatic pressure pressing or rigid body pressing, and as shown in FIG. A mother ceramic laminate (mother ceramic laminate after pressure bonding) 20 having the above structure was obtained. The mother ceramic laminate 20 is configured such that a pair of row marks 130a and 130b formed from the exposed portions of the two linear marks 13a and 13b described above can be recognized on the side surface 20a. Yes.
The pair of row marks 130a and 130b are formed by arranging the exposed end portions of the two linear marks 13a and 13b constituting the end face marking mark 13 on the side surface 20a in the stacking direction. It is.

  (5) Next, as shown in FIG. 6, the end face exposure mark 13 exposed on the side surface 20 a of the mother ceramic laminate 20 after press bonding, that is, the pair of row marks 130 a and 130 b is recognized, and the pair of rows The mother ceramic laminate 20 was cut using the position between the shape marks 130a and 130b as a cutting position. As a result, as shown in FIG. 7, the mother ceramic laminate 20 having a structure in which the division marks 14 are exposed on the above-described cut end face (side surface orthogonal to the side surface 20 a) 20 b of the mother ceramic laminate 20 is obtained. .

  In the first embodiment, the mother ceramic green sheets adjacent in the stacking direction are stacked while being shifted in the directions indicated by arrows A and B (FIG. 3), so that the division mark 14 extends in the stacking direction. It will be recognized as a row of marks 140a and 140b.

  (6) Then, as shown in FIG. 8, the division mark 14 (the two row marks 140a and 140b described above) exposed on the cut end face (the side face orthogonal to the side face 20a) 20b of the mother ceramic laminate 20 Was picked up by the image pickup means 21 and recognized, and the mother ceramic laminate 20 was cut at a predetermined interval based on the recognized division marks 14 (row marks 140a and 140b).

  Thereby, the mother ceramic laminated body 20 is divided | segmented into the strip | belt-shaped piece (half piece) 120 containing several piece (ceramic laminated body). In this step, when the mother ceramic laminate 20 is divided into individual pieces (unfired ceramic laminate) to be described later, the cut end surface is the surface from which the internal electrode is drawn (end surface on which the external electrode is formed). It is cut in such a manner as to become.

  In the first embodiment, as the image pickup means for recognizing the division mark 14, the same image pickup means 21 as that used for recognizing the above-described end face projection mark is used. However, it is also possible to use an image pickup means different from the image pickup means used for recognizing the end face mark.

  (7) Further, in (6) above, the mother ceramic laminate 20 cut with reference to the division mark 14 is rotated by 90 ° in plan view as shown in FIG. 9, and divided in the step (6) above. An internal electrode (not shown) exposed on the cut end face 20c formed by cutting with the marks 14 (row marks 140a, 140b) as a reference was imaged by the imaging means 21.

  Then, the mother ceramic multilayer body 20 is cut at a predetermined interval in a direction orthogonal to the cutting direction with the above-described division mark 14 as a reference, with the internal electrode imaged and recognized by the imaging means 21 as a reference. 10 were divided into individual pieces (individual unfired ceramic laminates 1) having the structure shown in FIG. As shown in FIG. 10, the individual piece (ceramic laminate) 1 includes a structure (laminated layer) including internal electrodes 2 (2a, 2b) for forming a capacitance and dummy internal electrodes 6 (6a, 6b). Ceramic capacitor element).

  In the step (7), the mother ceramic laminate 20 which is an aggregate of the strips (half pieces) 120 is cut with respect to the internal electrode and divided into individual pieces. The laminated body is provided with a division mark that becomes a reference when dividing the strip (half piece) into pieces, and the band piece (half piece) is divided into pieces based on the division mark. It is also possible to do.

  (8) Then, after firing the ceramic laminate, the external electrodes 5a and 5b are formed, thereby forming a pair of end faces 3 (3a, 3a, 3b) of the ceramic laminate (multilayer ceramic capacitor element) 1 as shown in FIG. 3b), a multilayer ceramic capacitor having a structure in which the external electrodes 5 (5a, 5b) are disposed so as to be electrically connected to the internal electrodes 2 (2a, 2b) was obtained.

  According to the method of the first embodiment, the mother ceramic multilayer body is cut at a predetermined position without requiring positioning by pressing the guide against the mother ceramic multilayer body as in the prior art, and the shape accuracy is high. It can be divided into individual pieces, and a multilayer ceramic capacitor can be manufactured efficiently.

[Embodiment 2]
In the first embodiment, a region to be the mother ceramic green sheet 11 in which a plurality of internal electrodes (internal electrode patterns) 12 having a predetermined shape, end-facing marks 13, division marks 14, and the like are arranged in the longitudinal direction. The case where the mother ceramic green sheets 11 are cut out one by one from the long ceramic green sheets 10 arranged in a row one by one has been described as an example. As shown in FIG. 12, a unit mother green sheet 51 including four regions 11U corresponding to the mother ceramic green sheet 11 in the first embodiment and a margin portion 53 that is a peripheral region is formed in a long line. Unit mother green sheets 51 are cut out one by one from the green ceramic green sheet 10 Forms.

  That is, in the second embodiment, the unit mother green sheet 51 including the four regions 11U corresponding to the mother ceramic green sheet 11 in the first embodiment and the margin portion 53 that is the peripheral region is used as one unit, and is long. A plurality of unit mother green sheets 51 were cut out from the ceramic green sheet 10 and laminated. In FIG. 13, a region surrounded by a dotted line L <b> 2 is a unit mother green sheet 51 cut out from the long ceramic green sheet 10.

  In FIG. 12, a region 52 surrounded by a cut line L3 indicated by a two-dot chain line is a region corresponding to four of the mother ceramic green sheets 11 in the first embodiment.

  In the second embodiment, each of the regions 11U corresponding to the mother ceramic green sheet 11 of the first embodiment has the same configuration as that of the mother ceramic green sheet 11 of the first embodiment. The internal electrodes 12, the end face marking marks 13, and the division marks 14 were formed on the long ceramic green sheet 10 so that the division marks 14 were arranged. The end surface marking mark 13 is provided on the cut line L3.

  The unit mother green sheets 51 formed by cutting the long mother green sheet 10 along the cut line L2 are stacked in a predetermined order, and the inner layers that are the outer layer portions of the multilayer ceramic capacitor are formed on the upper and lower surfaces of the stacked body. A laminate unit was formed by laminating ceramic green sheets on which no electrode pattern was formed.

  Then, the laminate unit is cut along the cut line L4 to be divided into mother ceramic laminates having the same structure as the mother ceramic laminate 20 in the first embodiment as shown in an exploded perspective view in FIG. To do.

  After that, the multilayer ceramic capacitor having the structure as shown in FIG. 11 is manufactured through steps such as division into individual ceramic laminates, firing, and formation of external electrodes in the same manner as in the first embodiment. can do.

  According to the method of the second embodiment, as described above, by performing one laminating step, a laminated unit including a plurality of mother ceramic laminated bodies is obtained, and by dividing this, a mother ceramic is obtained. Since a laminated body can be produced efficiently, productivity can be improved.

  In the first and second embodiments described above, the case where a long ceramic green sheet is used as the mother ceramic green sheet for printing the internal electrodes and the like has been described as an example. It is also possible to use a ceramic green sheet.

  In the above-described embodiment, the case where a multilayer ceramic capacitor is manufactured has been described as an example. However, the present invention is not limited to a multilayer ceramic capacitor, and various multilayer ceramic electronic components such as a multilayer inductor and a multilayer LC composite component are manufactured. It can be widely applied to.

  The present invention is not limited to the above-described embodiment in other points as well. The dimensions and specific shape of the multilayer ceramic electronic component to be manufactured, the cutting method for cutting the mother ceramic multilayer body in the manufacturing process, Various applications and modifications can be made within the scope of the invention with respect to the type of apparatus used therefor.

1 Ceramic laminate (multilayer ceramic capacitor element)
2 (2a, 2b) Internal electrode 3 for forming capacitance 3 (3a, 3b) End face 5 (5a, 5b) of ceramic laminate External electrode 6 (6a, 6b) Dummy internal electrode 10 Elongated ceramic green sheet 11 Mother ceramic green sheet 11U Area corresponding to mother ceramic green sheet 12 Internal electrode (internal electrode pattern)
13 End mark 13a, 13b Linear mark constituting end face mark 14 Dividing mark 20 Mother ceramic laminate 20a Side surface of mother ceramic laminate 20b Cut end face 20c Cut end face 51 Unit mother green sheet 130a, 130b Column mark (End face marking)
140a, 140b row mark (dividing mark)

Claims (6)

A method for manufacturing a multilayer ceramic electronic component manufactured through a dividing step of cutting a mother ceramic multilayer body including a plurality of laminated ceramic layers at a predetermined position and dividing it into individual multilayer ceramic electronic component elements. And
(A) The mother ceramic laminate includes an end face exposure mark exposed on a side surface and a division mark exposed on a cut end face formed by cutting the mother ceramic laminate based on the end face exposure mark. Has
(B) The dividing step includes a step of cutting the mother ceramic laminate on the basis of the end face mark and exposing the division mark on the cut end surface of the mother ceramic laminate, and exposing the cut end surface. Imaging the division mark by an imaging means, and cutting the mother ceramic laminate on the basis of the imaged division mark and dividing the multilayer ceramic electronic component element into a plurality of pieces. A method for producing a multilayer ceramic electronic component, comprising:   A plurality of ceramic green sheets each having an inner conductor pattern for an end face exposure mark that reaches the outer peripheral edge are stacked, whereby the inner conductor pattern for the end face exposure mark is arranged in the thickness direction. 2. The method for manufacturing a multilayer ceramic electronic component according to claim 1, wherein the mark is formed on a side surface of the mother ceramic multilayer body. Forming the mother ceramic laminate,
A punching process of punching a long ceramic green sheet into a rectangular shape;
A laminating step of laminating the punched rectangular ceramic green sheets,
In the punching step, the long conductor green sheet is punched so as to cut the internal conductor pattern for the end surface marking mark, thereby forming the internal conductor pattern for the end surface marking mark reaching the outer peripheral edge. A method for producing a multilayer ceramic electronic component according to claim 2, wherein a ceramic green sheet is obtained.   The method for manufacturing a ceramic electronic component according to any one of claims 1 to 3, wherein the end surface projecting marks are exposed on opposite side surfaces of the mother ceramic laminate.   One end surface marking mark is exposed from the side surface of the mother ceramic multilayer body, and is formed from a pair of end surface marking marks arranged at a predetermined interval in a direction along the main surface of the mother ceramic multilayer body. 5. The multilayer ceramic electronic device according to claim 1, wherein the multilayer ceramic electronic device is formed so that a position between the pair of end surface projection marks can be recognized as a cutting position. A manufacturing method for parts.   One of the pair of end face projection marks is a mark formed from an exposed portion of a plurality of layers of internal electrode patterns stacked via a ceramic layer and extending in the stacking direction, and the other is positioned via a ceramic layer. 6. The laminate according to claim 1, wherein the laminate is a mark formed from an exposed portion of a plurality of laminated internal electrode patterns and extending in the lamination direction in parallel with the one end face projection mark. Manufacturing method of ceramic electronic components.

Images