JP4508235B2 - Method for manufacturing ceramic electronic component and gravure printing method - Google Patents

Description

  The present invention relates to a method of manufacturing a ceramic electronic component such as a multilayer capacitor, and more particularly to a method of manufacturing a ceramic electronic component having an improved process of printing a conductive paste and a ceramic green sheet using a gravure printing method.

  For example, when manufacturing a multilayer ceramic capacitor, a method of gravure printing a ceramic paste and a conductive paste on a ceramic green sheet supported by a support film is known.

  In the following Patent Document 1, in the method of manufacturing a multilayer ceramic capacitor, a plurality of internal electrode patterns are gravure-printed by a first gravure roll on a dielectric grease sheet formed on a long support film; Disclosed is a gravure-printed stepped dielectric pattern between the patterns by a second gravure roll.

  As described above, when performing gravure printing on the long dielectric green sheet with the gravure roll for the internal electrode pattern and the step eliminating dielectric pattern, the width direction of the dielectric green sheet (dielectric green sheet A positional shift may occur in a direction perpendicular to the transport direction.

  Such misalignment in the width direction is caused when the internal electrode pattern and the step elimination dielectric pattern are printed on the dielectric grease sheet as described above. They overlap each other, or the gap between the two is excessively open, so that they cannot be formed at a desired position.

Therefore, conventionally, the correction of the deviation in the width direction is performed by moving the second gravure roll in its axial direction, that is, in the width direction of the long dielectric grease sheet before the second gravure printing step. It was done.
JP-A-8-250370

  For this reason, as shown in FIG. 17, a distorted step eliminating dielectric pattern 101 b has to be generated depending on the movement timing of the gravure roll. In FIG. 17, reference numeral 102 denotes a long dielectric grease sheet, the support film transport direction is the arrow A direction, the printing direction is the arrow B direction, and the position where the gravure roll is moved is the arrow C. The print patterns 101a, 101b, and 101c are each printed by one rotation of the gravure roll.

  Further, there is a problem that the coating thickness of the step eliminating dielectric pattern 101b varies depending on the movement timing of the gravure roll.

  When the printing distortion of the dielectric pattern for level difference and the variation in coating thickness occur as described above, the level difference with the internal electrode pattern, which is the original purpose of the level-resolving dielectric pattern, cannot be eliminated. There was a problem that structural defects of the body would occur.

  In addition to the method of printing the conductive paste and step-removing ceramic paste in the production of the above multilayer ceramic capacitor by gravure printing, the multi-color gravure printing method similarly causes printing misalignment and multi-color printing with high accuracy. There is a problem that it is difficult to perform printing.

  An object of the present invention is to provide a method for manufacturing a ceramic electronic component comprising a step of gravure printing a conductive paste or a step-resolving ceramic paste on a sheet in view of the above-described state of the prior art, and to improve printing misalignment. It is an object of the present invention to provide a method for manufacturing a ceramic electronic component which can be performed with high accuracy and hardly causes printing distortion of a ceramic paste for eliminating a step or a conductive paste.

The first invention of the present application includes a step of preparing a long composite sheet in which a ceramic green sheet is formed on a support film, and a gravure printing method in a first area in a printing area on the ceramic green sheet. A first gravure printing step of printing a first paste and forming a first print mark on the ceramic green sheet or support film; and gravure printing on a second region in a print region on the ceramic green sheet A second gravure printing step of printing a second paste by a method, and the printing result of the first gravure printing step and the printing result of the second gravure printing step are in a desired positional relationship, A method of manufacturing a ceramic electronic component for controlling a printing position in a second gravure printing process, comprising: a first imaging device; A step of obtaining the position of the first print mark using one image processing apparatus, and a desired position of the first print mark stored in advance and a position of the formed first print mark Based on the result, the second gravure printing process is performed by controlling the position of the composite sheet in the length direction of the composite sheet and the direction orthogonal to the conveyance direction of the composite sheet. , the position control of the composite sheet in the longitudinal direction of the composite sheet in the second gravure printing process is performed by moving the compensator roll provided upstream of the second gravure printing process, the second gravure the position control of the composite sheet in the direction orthogonal to the conveying direction of the composite sheet in the printing step, the second gravure roll the ceramic green It is a manufacturing method of a ceramic electronic component and performing by moving axially relative relative Nshito.

In another specific aspect of the first invention, the second gravure printing process, after moving the previous SL compensator roll and / or the second gravure roll, or carried out during the movement.

In another specific aspect of the first invention, before Symbol second gravure printing process, the second print mark formed on the ceramic green sheet or support film on the second imaging device and the second image processing Further comprising a step of determining the position of the second print mark using an apparatus, and the length direction of the composite sheet in the subsequent second gravure printing step and the direction orthogonal to the conveyance direction of the composite sheet control of the position of the composite sheet, rows based on a result of comparison between the position of the first and second print mark is the form with the desired positions of the first and second printing marks stored in advance Is called.

In still another specific aspect of the first invention, the position of a second print mark printing unit provided in a plate cylinder used in the second gravure printing step is the second imaging device and the second image. The position of the second print mark formed on the ceramic green sheet is obtained by detecting using the processing device .

Shape In another still another specific aspect of the first invention, the first and / or second print mark, the lengthwise dimension of the ceramic green sheet varies along the width direction of the ceramic green sheets have.

In still another specific aspect of the first invention, the first paste and the second paste are a conductive paste and a step eliminating ceramic paste, a step eliminating ceramic paste and a conductive paste, a conductive paste and a conductive paste. Any combination of pastes.
A second invention of the present application is a ceramic electronic component manufacturing apparatus for manufacturing a ceramic electronic component by the method for manufacturing a ceramic electronic component according to claim 1, wherein the ceramic green sheet is formed on a support film. In order to supply the composite sheet in the shape of a scale, a roller in which the composite sheet is wound around an outer peripheral surface, and a first area in a printing area on the ceramic green sheet of the composite sheet that is fed out from the roller. The first paste is printed by the gravure printing method, and the first gravure printing part that forms the first printing mark on the ceramic green sheet or the support film, and the first gravure printing part are arranged after the first gravure printing part. The second paste is printed on the second area in the print area on the ceramic green sheet by the gravure printing method. The second gravure printing unit, the printing result by the first gravure printing unit, and the printing result by the second gravure printing unit by the second gravure printing unit. It is arranged between the control device for controlling the printing position and the first and second gravure printing units, and is printed by the first gravure printing unit prior to printing in the second gravure printing unit. A first imaging device and a first image processing device for obtaining the position of the first print mark, and a front stage of the second gravure printing unit, and when printing by the second gravure printing unit A compensator roll for controlling the position of the composite sheet in the length direction of the composite sheet, The position control of the composite sheet in a direction, said a second gravure roll performed by moving axially relative the ceramic green sheet, to the control apparatus, the first printing mark The desired position of the first print mark obtained in advance is compared with the position of the first print mark thus formed, and the result is compared with the result. Based on this, by moving the compensator roll and the second gravure roll, the composite sheet is moved in the length direction of the composite sheet and in the direction orthogonal to the conveyance direction of the composite sheet. The apparatus for manufacturing a ceramic electronic component is characterized in that the position of printing by the second gravure printing unit is controlled .
In certain aspects of the second aspect of the present gun, the second gravure printing unit, a second further printing a print mark on the ceramic green sheet or support film on, the second gravure printing unit A second imaging device and a second image processing device that are provided in a subsequent stage and obtain the position of the second print mark are further provided, and the control device has a desired position of the second print mark. Further, the control device stores the positions of the first and second print marks detected by the first and second detection means and the desired first and second print marks stored in advance. The printing position by the second gravure printing unit is controlled so as to eliminate the difference.
In another specific aspect of the second invention of the present application, the second imaging device, which detects the position of the second printing mark printing portion provided on the plate cylinder used in the second gravure printing unit The control device obtains the position of the second print mark formed on the ceramic green sheet based on the position of the second print mark printing unit given from the second imaging device .

  Hereinafter, the present invention will be clarified by describing specific embodiments of the present invention with reference to the drawings.

  FIG. 4 is a schematic configuration diagram of a manufacturing apparatus used for manufacturing a multilayer ceramic capacitor in the present embodiment.

  In the multilayer ceramic electronic component manufacturing apparatus 1, a composite sheet 2 in which a ceramic green sheet is formed on a support film made of a synthetic resin such as polyethylene terephthalate, polypropylene, or polyethylene naphthalate is supplied as indicated by an arrow B in the drawing. . The multilayer ceramic electronic component manufacturing apparatus 1 includes first and second gravure printing units 3 and 4 and is arranged so that printing is performed on one surface of the composite sheet.

  The first gravure printing unit 3 includes a first gravure roll 5 as a plate cylinder and a first pressure contact roll 6. As shown in the perspective view of FIG. 5A, the gravure roll 5 has a cylindrical shape, and the outer peripheral surface 5a is provided with a printing portion 7a along the circumferential direction, and a predetermined extension extending in the axial direction. There is a gap 5b. In the printing unit 7a, a plurality of rectangular recesses 7b are arranged in a matrix so that the longitudinal direction thereof is parallel to the rotation direction of the gravure roll 5 in order to print the conductive paste serving as an internal electrode on the ceramic green sheet. Is provided. A plurality of cells (not shown) surrounded by a substantially grid-like bank are provided in each recess 7b. In addition, the shape of the recess is adapted to the shape of the electrode required for the multilayer ceramic electronic component, and is not limited to a rectangular shape. In addition, in FIG. 5A, one printing unit 7a is shown, but two or more printing units may be provided.

  Further, on the outer peripheral surface of the first gravure roll 5, not only the first printing unit 7a but also a first print mark for correcting a positional deviation in the conveyance direction of the composite sheet described later is printed. One print mark printing section 7c is provided. The shape of the print portion 7c for print marks is not particularly limited. In addition, a first trigger mark printing unit 7d is provided in front of the printing direction of the printing unit 7c for printing marks.

  The composite sheet 2 is sandwiched between the gravure roll 5 and the pressure roll 6 of the first gravure printing unit 3, and the conductive paste (the first paste is filled in the recess 7 b of the printing unit 7 a by a conductive paste applying means (not shown). ) Is transferred to the composite sheet 2 and gravure printing is performed. The conductive paste is a mixture of conductive powder such as Ag, Ag-Pd, Ni, Cu, Au, and an organic vehicle.

  In the 1st gravure printing part 3, in order to supply the composite sheet 2 between the said gravure roll 5 and the press-contact roll 6, the rollers 8a-8e are arrange | positioned and a composite sheet is provided via the rollers 8a-8e. 2 is supplied between the gravure roll 5 and the pressure contact roll 6. In addition, a roller 8 f is arranged at the subsequent stage of the gravure roll 5, and the printed composite sheet 2 is conveyed to the first drying device 9 through the roller 8 f. The drying device 9 includes an appropriate heater and is provided to dry the printed conductive paste.

  Rollers 10 a and 10 b are arranged on the downstream side of the drying device 9, and after the conductive paste is dried, the composite sheet 2 is supplied to the second gravure printing unit 4. In the second gravure printing unit 4, a second gravure roll 11 and a second pressure contact roll 12 are arranged for performing gravure printing.

  As shown in FIG. 5 (b), the second gravure roll 11 has a cylindrical shape like the first gravure roll 5, and the second outer surface 11a has a second shape along the circumferential direction. The printing unit 11b is provided and has a predetermined gap 11g extending in the axial direction.

  In the printing part 11b, in order to print the step-dissolving ceramic paste in the area where the conductive paste on the composite sheet 2 is not printed, there are a plurality of banks 11c composed of convex parts having substantially the same shape as the printed conductive paste. In addition to being provided at a position corresponding to the conductive paste, a lattice-shaped groove 11d filled with a ceramic paste for eliminating a step is provided around the periphery. In FIG. 5B, one printing unit 11b is shown, but two or more printing units may be provided.

  Further, on the outer peripheral surface 11a of the second gravure roll 11, not only the second printing unit 11b, but also the second gravure roll 5, the second for correcting the positional deviation in the conveyance direction of the composite sheet. A print mark printing unit 11f is provided for printing the print mark. The shape of the printing part 11f for print marks is not particularly limited. A trigger mark printing unit 11e is provided in front of the printing direction of the printing unit 11f for printing marks.

  The composite sheet 2 on which the conductive paste is printed is sandwiched between the gravure roll 11 and the pressure contact roll 12 of the second gravure printing unit 4, and a step-resolving ceramic paste applying means (not shown) is inserted into the groove 11d of the printing unit 11b. Is transferred to the composite sheet 2 and gravure printing is performed to eliminate the level difference. The step eliminating ceramic paste is a mixture of dielectric ceramic, magnetic ceramic, glass, glass ceramic or other ceramic powder and an organic vehicle.

  Moreover, in order to supply the composite sheet 2 between the gravure roll 11 and the pressure contact roll 12, rollers 13a to 13e and a compensator roll 28 are arranged.

  The compensator roll 28 is configured such that its position can be moved in the direction of arrow D in FIG. 4, thereby controlling the position in the length direction of the ceramic green sheet. Further, a second drying device 14 is disposed downstream of the gravure roll 11 via a roller 13f. The second drying device 14 is configured in the same manner as the first drying device 9. But the 2nd drying apparatus 14 is comprised so that it may have a heating source suitable for drying the ceramic paste for level | step difference elimination provided with the 2nd gravure roll 11. FIG.

  Rollers 15a and 15b are arranged downstream of the second drying device 14, and the composite sheet 2 printed by the first and second gravure printing units 3 and 4 is discharged along the direction of arrow C. Is done.

  As shown in FIG. 6, in this embodiment, the width direction of the conductive paste printed in the first gravure printing unit 3 and the ceramic paste for level difference elimination printed in the second gravure printing unit 4 (of the composite sheet). In order to correct the positional deviation in the direction orthogonal to the conveying direction), the second gravure roll 11 is connected to a moving device 20 that moves the second gravure roll 11 in the axial direction. The moving device 20 is schematically shown in FIG. 6, but may be constituted by any reciprocating drive source that can move the gravure roll 11 in an axial direction by a signal from the control device 24. Examples of such a reciprocating drive source include a reciprocating drive device such as an air cylinder and a hydraulic cylinder, or a reciprocating drive device combining a motor, a rack, and a pinion.

  On the other hand, FIG. 2 is a schematic configuration diagram showing a main part for controlling the axial position of the gravure roll 11 and the longitudinal position of the composite sheet in this embodiment. As shown in FIG. 2, the trigger sensor 21 and the first camera 22 are arranged in the front stage of the second gravure roll 11. The trigger sensor 21 is provided for detecting the first trigger mark, and the camera 22 is provided for detecting the first print mark. The trigger sensor 21 and the first camera 22 are connected to the first image processing device 23. The first image processing device 23 is connected to the control device 24.

  When the trigger mark is detected by the trigger sensor 21, the control device 24 gives the camera 22 a signal for photographing the first print mark by the camera 22. Then, the image of the first print mark detected by the camera 22 is processed by the image processing device 23, and a signal indicating the position of the first print mark is given to the control device 24.

  On the other hand, a trigger sensor 25, a second camera 26, and a second image processing device 27 are disposed downstream of the second gravure roll 11. The trigger sensor 25 is provided for photographing the second trigger mark printed by the second gravure roll 11, and the camera 26 is provided for photographing the second print mark. Further, the image processing device 27 is connected to the control device 24. When the control device 24 receives a signal indicating that the second trigger mark has been detected by the trigger sensor 25 after the second gravure printing step, the control device 24 drives the camera 26 so as to photograph the second print mark. The second camera 26 is driven. Then, the image captured by the second camera 26 is processed by the image processing device 27, and a signal indicating the position of the second print mark is given to the control device 24.

  The control device 24 stores predetermined desired positions of the first and second print marks, that is, desired length direction and width direction positions of the ceramic green sheets of the first and second print marks. Has been.

  Next, with reference to FIGS. 1A to 1C and FIGS. 3A and 3B, a method for manufacturing the multilayer ceramic electronic component of this example will be described.

  FIG. 1A is a schematic plan view of the composite sheet after the first and second gravure printing steps are performed. In FIG. 1A, the width of the support film (the dimension in the direction perpendicular to the arrow) and the width of the ceramic green sheet are the same, but the width of the ceramic green sheet may be smaller than the width of the support film. For example, the support film is exposed on both sides of the ceramic green sheet. In this case, the first and second trigger marks and the first and second print marks may be printed on the support film.

  The first trigger mark 33 and the first print mark 34 are printed in the first gravure printing process. As shown in FIG. 1B, the first trigger mark 33 and the first print mark 34 are printed as print marks after the first printing process. Only one print mark 34 is printed. The second trigger mark 35 and the second print mark 36 are printed in the second gravure printing process.

  As shown in FIG. 2, in the present embodiment, the position of the first print mark 34 is detected by using the image processing device 23 after the first gravure printing process and before the second gravure printing process. . That is, when the first trigger mark 33 is confirmed by the trigger sensor 21, the camera 22 as the first camera is driven by the control device 24, and the first print mark 34 is photographed. Then, the actual position of the first print mark 34 is given to the control device 24.

  The control device 24 calculates the difference between the actual position of the first print mark 34 obtained as described above and the desired position of the first print mark stored in advance in the control device 24, Based on the difference, the width direction distance q and the length direction distance r between the first and second print marks 34 and 35 shown in FIG. 1C are between predetermined positions of the first and second print marks. The composite sheet 2 is moved so as to match the width direction distance Q and the length direction distance R. This movement is performed by the moving device 20 and the compensator roll 28 described above. That is, the movement of the ceramic green sheet in the width direction is performed by the moving device 20, and the position of the compensator roll 28 is adjusted so that the movement in the length direction eliminates the difference in the length direction.

  Therefore, prior to the second gravure printing process, the composite green sheet is moved so that the positional relationship between the first and second print marks is appropriate, and the second gravure printing process is performed. That is, even if the first print mark is deviated from the desired position, the second print mark is printed so as to have a correct positional relationship with the first print mark. Therefore, in the subsequent second gravure printing process, it is possible to form a printed figure by the second gravure printing process with high accuracy with an appropriate positional relationship with respect to the figure printed by the first gravure printing process. . That is, it is possible to reliably suppress the relative displacement between the printed figures printed in the first and second gravure printing processes.

  In the present embodiment, the movement of the ceramic green sheet by the moving device 20 and the compensator roll 28 is performed prior to the second gravure printing step, but may be performed during the second gravure printing step. . That is, the ceramic green sheet may be moved during the process in the middle of starting the second gravure printing, and the subsequent printing in the second gravure printing process may be performed with high accuracy. In particular, in the second gravure printing process, when a plurality of printed figures are printed along the length direction, if the ceramic green sheet is moved in the area between the printed figures, the second gravure printing process It is possible to suppress deformation of a printed figure to be printed.

  However, in this embodiment, after the ceramic green sheet is moved, a second gravure printing process is performed using the gravure roll 11.

  When the second gravure printing process is performed, the second trigger mark 35 and the second print mark 36 shown in FIG. 1A are printed. When the second trigger mark 35 is detected by the trigger sensor 20 downstream of the second gravure roll 11, the control device 24 drives the camera 26, and the second print mark 36 is photographed by the camera 26. The position of the second print mark 36 is detected by the processing device 27 and given to the control device 24.

  On the other hand, the control device 24 stores a predetermined desired position of the second print mark. The control device 24 includes the positions of the first and second print marks actually printed in the first and second gravure printing processes, and the desired positions of the first and second print marks stored in advance. The ceramic green sheets are moved so as to eliminate the difference.

  Therefore, after the second gravure printing process, the ceramic green is eliminated so as to eliminate the difference between the actual printing positions of the first and second printing marks and the desired positions of the first and second printing marks stored in advance. By moving the sheet, in the subsequent printing, printing in the first and second gravure printing processes can be performed with high accuracy. However, in the present invention, the feedback control using the second print mark is not necessarily required, and only the feedforward control using the first print mark described above may be performed.

  However, in this embodiment, after the second gravure roll 11 is moved along the width direction of the ceramic green sheet and the position of the compensator roll 28 is moved by the moving device 20 as described above, , The distance between the second print marks 34 and 36 is surely matched with the target distances Q and R. Therefore, as shown in FIG. 7 and FIG. 8, when the second gravure printing process is performed thereafter, the graphic printed in the second gravure printing process is changed to a printed graphic printed in the first gravure printing process. On the other hand, it is possible to print at an accurate position. In other words, the conductive paste and the step eliminating ceramic paste can be printed accurately so that they do not overlap.

  In the composite sheet 2 subjected to the first and second gravure printing processes as described above, the ceramic green sheet 72 is formed on the support film 71 and the first sheet is formed on the ceramic green sheet 72 as shown in FIG. In the gravure printing process, the internal electrode 73 is formed, and in the second gravure printing process, the step elimination ceramic 74 is formed. In FIG. 8, the internal electrode 73 and the step eliminating ceramic 74 are formed without a gap, but may be formed to have a predetermined gap or a step with a desired width at the outer edge of the internal electrode. You may form so that the ceramic for cancellation may overlap.

  Such a long composite sheet 2 is cut by a cutting head (not shown) to cut the ceramic green sheet 72, the internal electrode 73, and the step-removing ceramic 74, and peels them off from the support film 71, either on the laminated stage or cut. By repeating the step of laminating in the head, a mother laminate 81 shown in FIG. 9A is obtained. A plain ceramic green sheet is laminated below the composite sheet to be laminated. In the upper layer, a plain ceramic green sheet may be laminated as necessary.

  In addition, the long composite sheet is cut into a card shape so as to surround the printing portion, and with the support film facing upward, it is crimped onto the lower plain ceramic green sheet placed on the lamination stage. The mother laminate 81 may be formed by repeating the process of peeling and laminating the support film 71.

  Next, the mother multilayer body 81 is cut in the thickness direction to obtain a multilayer body in units of individual multilayer ceramic capacitors. And the laminated body of each multilayer ceramic capacitor unit obtained as mentioned above is baked, and the ceramic sintered compact 92 shown in FIG.8 (b) is obtained. By forming the external electrodes 93 and 94 on both end faces of the ceramic sintered body 92, the multilayer ceramic capacitor 91 is obtained. The laminate and the external electrode may be fired simultaneously.

  In the method of manufacturing the multilayer ceramic capacitor 91, since the conductive paste and the step eliminating ceramic paste are printed in accordance with the above-described embodiment, the displacement due to the alignment of the printing of the conductive paste and the step eliminating ceramic paste is reduced. The level difference due to can be solved more reliably.

  Therefore, structural defects such as delamination hardly occur in the obtained sintered body, and the yield rate can be effectively increased.

  In addition to the above-described multilayer ceramic capacitor, the present invention can be applied to multilayer ceramic electronic components such as multilayer inductors, multilayer noise filters, multilayer LC filters, and multilayer composite modules. In this case, for example, by forming a via hole in a ceramic green sheet, the circuit element may be configured by connecting to a planar internal electrode pattern.

(First modification)
With reference to FIGS. 10-12, the manufacturing method of the multilayer ceramic electronic component of the 1st modification of a 1st Example is demonstrated. The first modified example and the second and third modified examples described later are different from the first example except that the configuration for detecting the position of the second print mark after the second gravure printing step is different. Since it is the same, only a different part is demonstrated and it abbreviate | omits by using the description of 1st Example about the same part.

  As shown in FIG. 10, the trigger sensor 41 and the camera 42 are connected to the image processing device 27. The trigger sensor 41 is provided for detecting the trigger mark printing unit 11 e on the second gravure roll 11. The camera 42 is provided for photographing the second print mark printing unit 11 f provided on the second gravure roll 11. That is, in this modification, not the second trigger mark and the second print mark printed on the composite sheet but the trigger mark printing unit 11e and the second print mark printing unit provided on the second gravure roll 11 11f itself is used to determine the position of the second print mark printing unit, which is given to the control device 24.

  Also in this modification, the control device 24 stores a desired position of the first print mark and a desired position of the second print mark in advance.

  In the present modification, as shown in FIG. 11, the first print mark 34 is printed on the composite sheet, and the position of the first print mark 34 is given to the control device 24 in the same manner as in the first embodiment. It is done.

  The control device 24, based on the position of the first printed mark 34 that is actually printed, is a position that is separated from the first and second printed marks stored in advance in the width direction distance Q and the length direction distance R. In the same manner as in the first embodiment, the ceramic green sheet is moved so that the second print mark is printed on. Therefore, prior to the second gravure printing step, the ceramic green sheet is moved to an appropriate position. Therefore, also in the second embodiment, even if the printed graphic printed in the first gravure process is shifted, the second positional relationship is appropriate with respect to the printed graphic printed in the first gravure printing process. A printed figure in the gravure printing process can be formed.

  Next, in the second gravure printing step, when the trigger sensor 41 detects the second trigger mark printing unit 11e, the second printing mark printing unit 11f shown in FIG. It is given to the control device 24. The timing at which the image was taken is also given to the control device 24. Based on the position information and timing, the control device 24 calculates the print position of the second print mark.

  In the present modification, the first and second print mark field desired positions stored in advance in the control device 24, the print position of the first print mark described above, and the second calculated by the control device 24 are used. The ceramic green sheet is moved in the same manner as in the first embodiment so as to eliminate the difference from the printing position of the print mark, and the second and subsequent second gravure printing steps are performed.

  Therefore, when the second gravure printing process after the next time is performed, the printed figure printed in the first and second gravure printing processes is printed at the correct position.

  Further, instead of directly obtaining the positions of the second trigger mark and the second print mark printed on the composite sheet, the trigger mark printing unit 11e provided on the second gravure roll 11 and the second print mark print Since the positions of the second trigger mark and the second print mark are obtained using the portion 11f itself, image processing is possible regardless of the material of the second trigger mark and the second print mark.

  For example, when the same ceramic material as the ceramic green sheet of the composite sheet is used for the second trigger mark and the second print mark, image processing of the second trigger mark and the second print mark is performed on the composite sheet. Although it may be difficult, if image processing is performed on the trigger mark printing unit 11e and the second printing mark printing unit 11f itself, the second gravure roll 11, the trigger mark printing unit 11e, and the second printing mark printing unit 11f Comparison is possible regardless of the material of the trigger mark and the print mark.

  The positions of the trigger mark printing unit 11e and the second printing mark printing unit and the positions of the second trigger mark and the second printing mark printed on the composite sheet are the second gravure roll 11 and the composite sheet. As long as there is no deviation due to slipping or the like, it is practically possible.

(Second modification)
A second modification of the first embodiment will be described with reference to FIGS.

  In the second modification, as shown in the plan view of the composite sheet after the second gravure printing process in FIG. 14, the first printing is performed outside the printing region after the first and second gravure printing processes. A mark 51 and a second print mark 52 are printed.

  The dimensions of the first and second print marks 51 and 52 along the length direction of the composite sheet 2 vary depending on the position in the width direction of the composite sheet. Specifically, the first and second print marks 51 and 52 have a shape in which the dimension along the composite sheet length direction increases inward along the width direction of the composite sheet. More specifically, the first and second print marks 51 and 52 have a triangular shape having a base on the inside.

  On the other hand, as shown in FIG. 13, a first sensor 53 and a first time measuring device 54 are arranged in the preceding stage of the second gravure roll 11. The first sensor 53 is configured to be turned on when the first print mark 51 passes, that is, while it passes. The first time measuring device 54 measures the time during which the first sensor 53 is in the on state. In other words, the first time measuring device 54 measures the time period during which the first print mark 51 is passing, and gives it to the control device 24. The timing at which the first sensor 53 is turned on is also given to the control device 24.

  On the other hand, the second sensor 55 and the second time measuring device 56 are similarly arranged in the subsequent stage of the second gravure roll 11. The second sensor 55 is configured in the same manner as the first sensor 53, except that the second sensor 55 is in an ON state while the second print mark 52 passes. Therefore, the control device 24 is given a time period during which the second print mark 52 passes from the second time measuring device 56. The timing at which the second sensor 55 is turned on is also given to the control device 24.

  Incidentally, as described above, the first and second print marks 51 and 52 are configured such that the dimension along the length direction of the composite sheet changes depending on the position in the width direction. Therefore, the position in the width direction of the first and second print marks 51 and 52 can be detected by measuring the time period during which the first and second print marks 51 and 52 pass. This will be described more specifically with reference to FIGS. 15 and 16.

  When the first print mark 51 passes, a time period i during which the first print mark 51 passes is obtained as shown in FIG. On the other hand, when the second print mark 52 passes, the control device 24 is given a time period u shown in FIG. When the time period i and the time period u are given, the first and second print marks 51 and 52 have the shape as described above. The position in the width direction can be calculated. Based on the calculation result, the sheet width direction distance w between the first and second print marks 51 and 52 is obtained. On the other hand, in the control device 24, the distance in the width direction between the first and second print marks 51 and 52 when printing is performed accurately in the first and second gravure printing steps is stored in advance. . Therefore, in the control device 24, the second gravure roll 11 is moved by the moving device so as to eliminate the difference between the actually obtained distance between the first and second print marks 51 and 52 and the target distance. If this is the case, it is possible to reliably eliminate printing misalignment in the width direction.

  In addition, printing deviation not only in the width direction but also in the length direction of the ceramic green sheet can be eliminated.

  That is, since the sensor 53 and 55 simultaneously detect the measurement start timing when the time periods i and u are measured, the distance v in the length direction of the print marks 51 and 52 is also obtained. If the control device 24 stores in advance the target distance in the length direction between the first and second print marks 51 and 52 printed in the first and second gravure printing steps, the length The second gravure printing is performed by moving the compensator roll 28 by the difference between the target distance in the direction and the distance in the length direction between the first and second print marks 51 and 52 obtained as described above. What is necessary is just to correct | amend the length direction position of the ceramic green sheet in a process.

(Third Modification)
In the second modification, the second sensor 55 measures the period during which the second print mark 52 printed by the second gravure roll 11 passes, but as shown in FIG. These sensors may be arranged so as to measure the time period Ua through which the second print mark printing unit 11h provided in the second gravure roll 11 passes. In this case, if the positional relationship between the passage time period Ua of the second print mark printing part on the surface of the gravure roll 11 and the second print mark that is actually printed is obtained, the time period Ua can be determined. The position where the second print mark is printed can be determined. About another point, it is the same as that of the 2nd modification.

(Other variations)
In the first embodiment, the first and second print marks are photographed by one camera arranged downstream of the gravure roll 11, but the first and second print marks are separated from each other. You may comprise so that it may print with a camera. That is, in addition to the camera that captures the trigger mark, two cameras may be further arranged behind the second gravure roll 11.

  Also in the second modified example, two sensors may be arranged in the subsequent stage of the second gravure roll 11 in order to measure the passage times of the first and second print marks.

  In the present invention, only the control along the width direction of the sheet may be performed by moving the axial position of the second gravure roll.

  In the embodiments and modifications described above, the first paste is the conductive paste and the second paste is the step eliminating ceramic paste, but the first paste is the step eliminating ceramic paste, The paste may be a conductive paste. Further, both the first and second pastes may be conductive pastes. Examples of the first and second pastes are conductive pastes, for example, when electrode patterns having different shapes are formed of the first and second pastes, when a structure using conductive pastes of different materials is obtained, or stacked For example, when painting is necessary.

  Further, the present invention can be applied not only to the multilayer ceramic electronic component but also to the manufacture of other ceramic electronic components.

(A) is a schematic plan view for explaining the printed figure and the first and second print marks after the first and second gravure printing steps are performed, and (b) shows the first print mark. A schematic plan view for explaining, (c) a schematic plan view for explaining the relationship between the first and second print marks. FIG. 3 is a schematic configuration diagram of an apparatus for detecting the positions of first and second print marks according to the first embodiment of the present invention. FIG. 3 is a schematic perspective view for explaining an axial movement amount of the second gravure roll. The schematic block diagram of the apparatus for performing the 1st, 2nd gravure printing process used in the 1st Example of this invention. (A) And (b) is a perspective view for demonstrating the 1st and 2nd gravure roll, respectively. The schematic block diagram for demonstrating the apparatus which moves a gravure roll to the axial direction in a 1st Example. The typical top view which shows the state after performing the gravure printing by the 1st, 2nd gravure printing process on the ceramic green sheet on a support film in a 1st Example. The typical front sectional view showing the state where the 1st and 2nd gravure printing process was performed on the ceramic green sheet on a support film in the 1st example, and the conductive paste and the ceramic paste for level difference cancellation were printed. (A) is front sectional drawing which shows the laminated body of the mother obtained in the 1st Example, (b) is front sectional drawing which shows the laminated ceramic capacitor finally obtained in the 1st Example. The schematic block diagram which shows the structure for detecting the position of the 1st printing mark and the 2nd printing mark printing part in the 1st modification of this invention. The typical top view for demonstrating the 1st printing mark printed in the 1st modification. The top view which shows typically the 2nd printing mark printed in the 1st modification. FIG. 9 is a schematic configuration diagram of an apparatus for detecting the positions of first and second print marks in a second modification of the present invention. The typical top view for demonstrating the printed figure and the 1st, 2nd printing mark after the 1st, 2nd gravure printing process was performed in the 2nd modification. (A) is a schematic diagram for demonstrating the process of detecting the passage time of the 1st printing mark in a 2nd modification, (b) demonstrates the process of detecting the passage period of the 2nd printing mark. Schematic for doing. The typical perspective view for demonstrating the process of detecting the passage period of the 2nd printing mark printing part provided in the 2nd gravure roll in the 3rd modification. The typical top view for demonstrating the process of printing the electrically conductive paste and the ceramic paste for level | step difference elimination in the manufacturing method of the conventional ceramic electronic component.

Explanation of symbols

DESCRIPTION OF SYMBOLS 2 ... Composite sheet 3, 4 ... 1st, 2nd gravure printing part 5 ... 1st gravure roll 6 ... 1st press-contact roll 7a ... 1st printing part 7b ... Recessed part 7c ... 1st printing mark printing part 7d ... 1st trigger mark printing part 11 ... 2nd gravure roll 11a ... Outer peripheral surface 11e ... 2nd trigger mark printing part 11f ... 2nd printing mark printing part 20 ... Moving device 21 ... Trigger sensor 22 ... 1st camera DESCRIPTION OF SYMBOLS 23 ... Image processing apparatus 24 ... Control apparatus 25 ... Trigger sensor 26 ... 2nd camera 27 ... Image processing apparatus 28 ... Compensator roll 32 ... Print figure 33 ... 1st trigger mark 34 ... 1st print mark 35 ... 1st 2 trigger mark 36 ... 2nd print mark 41 ... trigger sensor 42 ... camera 51 ... 1st print mark 52 ... 2nd print mark 53 ... 1st sensor 54 ... 1st 1 time measuring device 55 ... second sensor 56 ... second time measuring device 71 ... support film 72 ... ceramic green sheet 73 ... internal electrode 74 ... ceramic for level difference elimination 81 ... laminated body of mother 91 ... laminated ceramic capacitor 92 ... Ceramic sintered body 93, 94 ... External electrode

Claims (9)

Preparing a long composite sheet in which a ceramic green sheet is formed on a support film;
A first gravure printing step of printing a first paste by a gravure printing method on a first area in a printing area on the ceramic green sheet and forming a first print mark on the ceramic green sheet or a support film When,
A second gravure printing step of printing a second paste by a gravure printing method in a second region in the printing region on the ceramic green sheet,
A method of manufacturing a ceramic electronic component that controls a printing position in the second gravure printing step so that a printing result in the first gravure printing step and a printing result in the second gravure printing step have a desired positional relationship. There,
A step of obtaining a position of the first print mark using a first imaging device and a first image processing device;
The desired position of the first print mark stored in advance is compared with the position of the formed first print mark, and based on the result, the length direction of the composite sheet and the composite sheet are compared. Controlling the position of the composite sheet in a direction orthogonal to the transport direction of the second gravure printing process,
The position control of the composite sheet in the length direction of the composite sheet in the second gravure printing step is performed by moving a compensator roll provided in the previous stage of the second gravure printing step,
The position control of the composite sheet in a direction orthogonal to the conveyance direction of the composite sheet in the second gravure printing step is performed by moving a second gravure roll in the axial direction relative to the ceramic green sheet. A method of manufacturing a ceramic electronic component. The second gravure printing process, the production of ceramic electronic component according to claim 1, before Symbol after moving the compensator roll and / or the second gravure roll, or be characterized that takes place during the movement Method. Prior Symbol second gravure printing process to form a second printed mark on the ceramic green sheet or the supporting film on,
A step of obtaining a position of the second print mark using a second imaging device and a second image processing device;
The control of the position of the composite sheet in the length direction of the composite sheet in the subsequent second gravure printing step and the direction orthogonal to the conveyance direction of the composite sheet is the first and second stored in advance. production of a ceramic electronic component according to claim 1 or 2, characterized in that dividing line based on a result of comparison between the position of the first and second print mark is the form with the desired position of the print mark Method. The ceramic is detected by detecting the position of a second printing mark printing unit provided on a plate cylinder used in the second gravure printing process by using the second imaging device and the second image processing device. The method for manufacturing a ceramic electronic component according to claim 3 , wherein the position of the second printed mark formed on the green sheet is obtained. The said 1st and / or 2nd printing mark has the shape from which the length direction dimension of this ceramic green sheet changes along the width direction of a ceramic green sheet, The 3rd or 4th characterized by the above-mentioned. The manufacturing method of the ceramic electronic component of description. The first paste and the second paste are any combination of a conductive paste and a step eliminating ceramic paste, a step eliminating ceramic paste and a conductive paste, or a conductive paste and a conductive paste. The manufacturing method of the ceramic electronic component in any one of 1-5 . A ceramic electronic component manufacturing apparatus for manufacturing a ceramic electronic component by the method for manufacturing a ceramic electronic component according to claim 1,
In order to supply a long composite sheet in which a ceramic green sheet is formed on a support film, a roller around which the composite sheet is wound,
A first paste is printed by a gravure printing method in a first area in the printing area on the ceramic green sheet of the composite sheet fed from the roller, and the first paste is printed on the ceramic green sheet or the support film. A first gravure printing part for forming a print mark ;
A second gravure printing unit, which is arranged at a subsequent stage of the first gravure printing unit, and prints a second paste by a gravure printing method in a second region in the printing region on the ceramic green sheet;
A control device for controlling a printing position by the second gravure printing unit so that a printing result by the first gravure printing unit and a printing result by the second gravure printing unit have a desired positional relationship; ,
Positioned between the first and second gravure printing sections, the position of the first print mark printed by the first gravure printing section is obtained prior to printing in the second gravure printing section. A first imaging device and a first image processing device for
A compensator roll that is provided in a preceding stage of the second gravure printing unit and performs position control of the composite sheet in the length direction of the composite sheet at the time of printing by the second gravure printing unit;
Position control of the composite sheet in a direction orthogonal to the conveyance direction of the composite sheet during printing by the second gravure printing unit is performed by moving in the axial direction relative to the ceramic green sheet . 2 gravure rolls ,
In the control device, a desired position of the first print mark is stored in advance, and the control device stores the desired position of the first print mark obtained in advance and the formed first print mark. The position of the print mark is compared, and based on the result, the composite sheet is moved in the length direction of the composite sheet by moving the compensator roll and the second gravure roll, and the composite sheet An apparatus for manufacturing a ceramic electronic component, wherein the position of printing by the second gravure printing unit is controlled by moving in a direction perpendicular to the conveying direction . The second gravure printing unit further prints a second print mark on the ceramic green sheet or the support film,
A second imaging device and a second image processing device, which are provided at a subsequent stage of the second gravure printing unit and obtain a position of the second print mark ;
The control device further stores a desired position of the second print mark,
The control device calculates a difference between the positions of the first and second print marks detected by the first and second detection means and desired positions of the first and second print marks stored in advance. The apparatus for manufacturing a ceramic electronic component according to claim 7 , wherein the printing position by the second gravure printing unit is controlled so as to eliminate the difference. The second imaging device detects a position of a second print mark printing unit provided on a plate cylinder used in the second gravure printing unit ,
Wherein the control device, based on said second second position of the printing mark printing unit provided from the imaging device, and obtains the position of the second print mark formed on the ceramic green sheet The apparatus for manufacturing a ceramic electronic component according to claim 8 .

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