JP2013089765A - Gravure printing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gravure printing apparatus in which the transfer amount of print paste onto a printed sheet can be adjusted partially.SOLUTION: A gravure printing apparatus 20 includes a plate cylinder 22 having a recess 24 in the surface, and an impression cylinder 30 placed to face the plate cylinder 22. The recess 24 is filled with a conductive paste 28 stored in a reservoir 26, and then the conductive paste 28 is transferred onto a ceramic green sheet 32 at the opposing part of the plate cylinder 22 and the impression cylinder 30. Transfer amount of the conductive paste 28 at a magnetized part is adjusted by magnetizing a part of the plate cylinder 22 and a part of the impression cylinder 30.

Description

  The present invention relates to a gravure printing apparatus, and more particularly to a gravure printing apparatus for printing a conductive paste on a ceramic green sheet used for a multilayer electronic component, for example.

  FIG. 13 is an illustrative view showing a multilayer ceramic capacitor as an example of a multilayer electronic component. The multilayer ceramic capacitor 1 includes a base 2. The base 2 includes a plurality of dielectric ceramic layers 3, and internal electrodes 4 a and 4 b are formed between the adjacent dielectric ceramic layers 3. One end of one internal electrode 4a is drawn out to one side of the opposite end of the base 2, and the other end of the internal electrode 4a is formed to extend to the vicinity of the other side of the opposite end of the base 2. The Further, one end side of the other internal electrode 4b is drawn out to the other side of the opposite end portion of the base body 2, and the other end side of the internal electrode 4b extends to the vicinity of one side of the opposite end portion of the base body 2. It is formed. These internal electrodes 4 a and 4 b are alternately arranged in the thickness direction of the base 2. Therefore, the internal electrodes 4 a and 4 b overlap each other inside the base 2, and the adjacent internal electrodes 4 a and 4 b are drawn out to the opposite end of the base 2. External electrodes 5a and 5b are formed at both ends of the base 2, and the internal electrodes 4a and 4b are connected to the external electrodes 5a and 5b, respectively. Accordingly, a capacitance is formed between the external electrodes 5a and 5b.

  In order to obtain a multilayer electronic component such as a multilayer ceramic capacitor, a ceramic green sheet having an electrode pattern formed with a conductive paste or the like is laminated, and the resulting laminate is fired to form a substrate having internal electrodes. . A multilayer electronic component is formed by forming an external electrode connected to the internal electrode at the end of the substrate. FIG. 14 is an illustrative view showing one example of a gravure printing apparatus for printing a conductive paste on a ceramic green sheet. The gravure printing apparatus 10 includes a cylindrical gravure roll 11. On the surface of the gravure roll 11, a recess 12 having an electrode pattern shape formed on the ceramic green sheet is formed. The lower part of the gravure roll 11 is immersed in a conductive paint 13 put in an ink pan, and the conductive paint 13 is introduced into the recess 12 by rotating the gravure roll 11. A doctor blade 14 is pressed against the surface of the gravure roll 11, and the conductive paint adhering to the surface of the gravure roll 11 rotating by the doctor blade 14 is scraped off.

  Opposite to the gravure roll 11, a cylindrical impression cylinder 15 is arranged. A magnet 16 is disposed inside the impression cylinder 15, and a magnetic field orthogonal to the surface of the gravure roll 11 is applied to a portion where the gravure roll 11 and the impression cylinder 15 are opposed to each other. Then, by passing the ceramic green sheet 17 between the rotating gravure roll 11 and the impression cylinder 15, the conductive paint 13 introduced into the recess 12 of the gravure roll 11 is transferred onto the ceramic green sheet 17 and the electrode pattern is changed. It is formed. Here, by containing the magnetic powder in the conductive paint 13, the conductive paint 13 is attracted to the ceramic green sheet 17 side by the magnetic field by the magnet 16 at the facing portion between the gravure roll 11 and the impression cylinder 15. It is done. Therefore, the transfer rate of the conductive paint 13 from the gravure roll 11 to the ceramic green sheet 17 can be increased, and the stability of the printing thickness of the transferred conductive paint 13 can be ensured (see Patent Document 1). .

  As shown in FIG. 15, the N pole and the S pole may be arranged adjacent to each other in the circumferential direction of the impression cylinder 15. In this case, a magnetic field is generated in a direction slightly inclined with respect to the surface of the impression cylinder 15, but the above-described effect can be obtained (see Patent Document 1).

  A plurality of ceramic green sheets 17 to which the conductive paint 13 is transferred are laminated to form a laminate. At this time, as shown in FIG. 16, the gap portion 18 between the conductive paints 13 adjacent on one ceramic green sheet 17 is disposed at the center of the conductive paint 13 on the adjacent ceramic green sheet 17. In this way, a plurality of ceramic green sheets 17 are laminated. And a chip | tip is formed by cut | disconnecting a laminated body in the gap part 18 between the conductive paints 13 adjacent on one ceramic green sheet 17. FIG. The ends of the conductive paint adjacent to each other in the stacking direction of the ceramic green sheets 17 are alternately drawn out to the opposite ends of the chip.

  By firing this chip, the base 2 is formed with the internal electrodes 4a and 4b facing each other with the dielectric ceramic layer 3 interposed therebetween. The obtained substrate 2 is subjected to barrel polishing, for example, to expose the lead-out portions of the internal electrodes 4a and 4b, and the corners of the substrate 2 are rounded as necessary. Then, the conductive electrodes are applied to the end portions of the base body 2 where the internal electrodes 4a and 4b are exposed, and sintered, thereby forming the external electrodes 5a and 5b.

JP-A-8-316091

  When the ceramic green sheets 17 to which the conductive paint is transferred are laminated, as shown in FIG. 16, the adjacent ceramic green sheets are placed in the gap portion 18 between the adjacent conductive paints 13 on one ceramic green sheet 17. The central part of the conductive paint 13 on 17 is arranged so as to overlap. Therefore, when the laminated ceramic green sheets 17 are pressure-bonded, the adjacent ceramic green sheet 17 fits into the gap portion 18 between the conductive paints 13, and the central part of the conductive paint 13 thereover is deformed, so that the center There is a step between the part and the other part. Such a level difference increases as the number of laminated ceramic green sheets 17 increases, resulting in a structural defect of the multilayer ceramic capacitor.

  Therefore, as shown in FIG. 17, the thickness near the center of the conductive coating 13 transferred onto the ceramic green sheet 17 is made larger than that of other portions, and this portion is set to the conductive coating 13 on the adjacent ceramic green sheet 17. If it arrange | positions so that it may overlap with the gap part 18 between, the gap part 18 and the thick part of the conductive coating material 13 will overlap, and the deformation | transformation of the conductive coating material 13 can be prevented. However, the technique of Patent Document 1 is for increasing the transfer amount of the conductive paint 13 onto the ceramic green sheet 17, and the thickness of a part of the transferred conductive paint 13 cannot be adjusted. .

  Therefore, the main object of the present invention is to provide a gravure printing apparatus capable of partially adjusting the transfer amount of the printing paste onto the printing sheet, and in particular, to determine the transfer amount of the conductive paint onto the ceramic green sheet. It is to provide a gravure printing apparatus that can be adjusted automatically.

The present invention includes a plate cylinder provided with a concave portion in the shape of a print pattern on the outer peripheral surface, and supplies a printing paste containing magnetic powder in the concave portion to bring the printing sheet into contact with the plate cylinder. A gravure printing apparatus for transferring a held printing paste to a printing sheet, wherein the surface of the recess is locally magnetized.
The amount of the printing paste in which the printing paste containing the magnetic powder is locally attracted to the printing drum side due to the surface of the concave portion of the printing drum being locally magnetized, and only that portion is transferred onto the ceramic green sheet. Less. Therefore, the transferred printing paste is thin at a position corresponding to the magnetized portion in the concave portion of the plate cylinder, and the printing paste is thick at a position corresponding to the non-magnetized portion.

In such a gravure printing apparatus, the printing sheet is a ceramic green sheet, the printing paste is a conductive paste, the printing pattern is used as an internal electrode pattern, the concave portion is rectangular, and the rectangular concave portion is formed in two. A central region that is divided into two regions is provided, and the region other than the central region can be magnetized.
In particular, this gravure printing apparatus transfers a conductive paste onto a ceramic green sheet, and the conductive paste is rectangularly formed on the ceramic green sheet by magnetizing a recess in a portion other than the rectangular central region. The thickness of the central region of the electrode pattern transferred to the shape can be increased, and the thickness of the other portions can be decreased. Therefore, by laminating the ceramic green sheet so that the gap between adjacent electrode patterns on one ceramic green sheet and the thick part of the electrode pattern on the adjacent ceramic green sheet overlap, Can be reduced.

The printed sheet is a ceramic green sheet, the printing paste is a conductive paste, the printing pattern is rectangular, the rectangular printing pattern is composed of a drawer part and a capacity part, and the drawer part is a rectangular shape. It is provided along one side of the print pattern, and the capacitor portion of the recess can be magnetized.
This gravure printing apparatus can be used particularly for producing a multilayer ceramic capacitor. In this case, an electrode pattern composed of a lead portion and a capacitor portion is printed on a ceramic green sheet using a conductive paste. The At this time, by magnetizing the capacitor portion in the concave portion of the plate cylinder, the thickness of the portion serving as the lead portion of the internal electrode can be increased. In this case as well, the distortion of the electrode pattern can be reduced by superimposing the portion of the electrode pattern that becomes the lead electrode on the gap portion between the electrode patterns on the adjacent ceramic green sheet.

The present invention also includes a plate cylinder provided with a concave portion having a printed pattern shape on the outer peripheral surface, and an impression cylinder provided at a position facing the plate cylinder, and supplying a printing paste containing magnetic powder in the concave portion. The gravure printing apparatus transfers the printing paste held in the recess to the printing sheet by bringing the printing sheet into contact with the printing cylinder by sandwiching the printing sheet between the plate cylinder and the impression cylinder, The gravure printing apparatus is characterized in that a region of the surface of the impression cylinder facing the concave portion is locally magnetized.
In order to transfer the printing paste onto the sheet to be printed so that the thickness is partially different, the impression cylinder disposed opposite to the plate cylinder may be partially magnetized. In this case, since the printing paste is attracted to the printing sheet side in contact with the impression cylinder in the magnetized portion of the impression cylinder, the transfer amount of the printing paste onto the printing sheet can be partially increased.

In such a gravure printing apparatus, the printing sheet is a ceramic green sheet, the printing paste is a conductive paste, the printing pattern is used as an internal electrode, and the area of the impression cylinder facing the recess is rectangular. The central region can be locally magnetized so as to divide the rectangular region into two regions.
When the gravure printing apparatus is used for the production of multilayer electronic components, a rectangular printed pattern is used as an internal electrode, and the central area is divided into two areas on the impression cylinder on the rectangular area facing the recess. Is locally magnetized. Thereby, the central region of the electrode pattern to which the conductive paste is transferred in a rectangular shape can be thickened.

The printed sheet is a ceramic green sheet, the printing paste is a conductive paste, the printing pattern is rectangular, the rectangular printing pattern is composed of a drawer part and a capacity part, and the drawer part is a rectangular shape. It is provided along one side of the printing pattern, and can contact the printing sheet of the impression cylinder so that the portion corresponding to the drawing portion is magnetized.
In particular, this gravure printing apparatus can be used for the production of a multilayer ceramic capacitor. In this case, the portion of the impression cylinder that comes into contact with the print-receiving sheet is magnetized. Thereby, it is possible to form a thickened lead portion of the electrode pattern to which the conductive paste is transferred.

  According to the present invention, by partially magnetizing the plate cylinder or the impression cylinder, printing can be performed on the printing sheet by partially changing the thickness using the printing paste containing the magnetic powder. This gravure printing apparatus can be used for producing a multilayer electronic component. In this case, the conductive paste containing the magnetic powder is printed on the ceramic green sheet, but by partially magnetizing the plate cylinder and the impression cylinder, for example, only a portion that becomes the lead portion of the internal electrode is formed thick. be able to. Thus, for example, when a ceramic green sheet is laminated to produce a multilayer ceramic capacitor, the thick part of the electrode pattern formed by transferring the conductive paste is arranged in the part without the electrode pattern of the adjacent ceramic green sheet. As a result, deformation of the electrode pattern can be suppressed, and a step between the lead-out portion of the internal electrode and the other portion can be suppressed. Therefore, it is possible to obtain a monolithic ceramic capacitor in which internal electrode distortion is small and structural defects are small.

  The above-mentioned object, other objects, features and advantages of the present invention will become more apparent from the following description of embodiments for carrying out the invention with reference to the drawings.

It is an illustration figure which shows an example of the gravure printing apparatus of this invention. It is an illustration figure which shows a part of gravure printing apparatus shown in FIG. It is an illustration figure which shows the electrode pattern formed in the ceramic green sheet shown in FIG. It is an illustration figure which shows the recessed part formed in the plate cylinder shown in FIG. It is an illustration figure which shows the lamination | stacking state of the ceramic green sheet printed using the gravure printing apparatus shown in FIG. It is an illustration figure which shows a part of other example of the gravure printing apparatus shown in FIG. It is an illustration figure which shows the magnetization part of the impression cylinder shown in FIG. It is an illustration figure which shows the other example of the electrode pattern formed in a ceramic green sheet. It is an illustration figure which shows a part of gravure printing apparatus used in order to form the electrode pattern shown in FIG. It is an illustration figure which shows the example of the recessed part formed in the plate cylinder shown in FIG. It is an illustration figure which shows the impression cylinder used for the other example of the gravure printing apparatus for forming the electrode pattern shown in FIG. It is an illustration figure which shows the magnetization part formed in the impression cylinder shown in FIG. It is an illustration figure which shows the multilayer ceramic capacitor as an example of a multilayer type electronic component. It is an illustration figure which shows an example of the conventional printing apparatus. It is an illustration figure which shows the other example of the conventional printing apparatus. It is an illustration figure which shows the lamination | stacking state of the ceramic green sheet printed using the conventional printing apparatus. It is an illustration figure which shows the lamination | stacking state considered in order to solve the subject of the lamination | stacking state shown in FIG.

  FIG. 1 is an illustrative view showing one example of a gravure printing apparatus of the present invention. This gravure printing apparatus is used for printing a pattern or the like on a printing sheet using a printing paste. Here, for example, a gravure printing apparatus used for manufacturing a multilayer electronic component such as a multilayer ceramic capacitor, and a gravure printing apparatus for printing an electrode pattern serving as an internal electrode on a ceramic green sheet will be described. . The gravure printing apparatus 20 includes a cylindrical plate cylinder 22. A plurality of recesses 24 are formed on the surface of the plate cylinder 22 so as to have an electrode pattern printed on the ceramic green sheet. The recesses 24 are formed, for example, at intervals in the circumferential direction and the width direction of the plate cylinder 22 so that the depth is 5 to 50 μm. The recess 24 is formed, for example, by etching or engraving using a photomask master.

  A storage tank 26 is disposed below the plate cylinder 22, and a conductive paste 28 as a printing paste is stored in the storage tank 26. For the conductive paste 28, for example, Ni powder having a particle diameter of 0.03 to 1 μm is used as a conductor material. Ni powder is used not only as a conductor material but also as a magnetic material. When a non-magnetic material other than Ni is used as the conductive material, for example, a magnetic powder such as a magnetic resin is added. A resin is used as the binder. Furthermore, a ceramic material, a dispersant, and the like for controlling shrinkage during sintering are added. The conductive paste 28 is stored in the storage tank 26, and the lower part of the plate cylinder 22 is immersed in the conductive paste 28. Thereby, the conductive paste 28 is introduced into the recess 24 on the surface of the plate cylinder 22.

  Further, a cylindrical impression cylinder 30 is disposed above the plate cylinder 22 so as to face the plate cylinder 22. The plate cylinder 22 and the impression cylinder 30 are arranged in parallel, and a ceramic green sheet 32 is passed between the plate cylinder 22 and the impression cylinder 30.

  In this printing apparatus 20, the conductive paste 28 stored in the storage tank 26 is introduced into the concave portion 24 of the plate cylinder 22, and the conductive paste 28 is carried to the contact portion with the ceramic green sheet 32. The blade 34 is pressed against the surface of the plate cylinder 22. The blade 34 scrapes off the conductive paste 28 attached to the surface of the plate cylinder 22 outside the recess 24.

  In order to form the electrode pattern 36 by transferring the conductive paste 28 to the ceramic green sheet 32 using the gravure printing apparatus 20, the plate cylinder 22 and the pressure cylinder 30 and the pressure cylinder 30 are rotated. A ceramic green sheet 32 is passed between the cylinders 30. Thereby, the ceramic green sheet 32 is conveyed by the impression cylinder 30 and pressed against the surface of the plate cylinder 22.

  The conductive paste 28 is applied to the surface of the plate cylinder 22 in the storage tank 26, but the excess conductive paste 28 is scraped off by the blades 28 arranged in the rotation direction of the plate cylinder 22. Accordingly, the ceramic green sheet 32 is pressed against the plate cylinder 22 in a state where the conductive paste 28 is introduced into the recess 24 of the plate cylinder 22. As shown in FIG. 2, the ceramic green sheet 32 is pressed against the plate cylinder 22 by the impression cylinder 30, whereby the conductive paste 28 filled in the recess 24 is transferred onto the ceramic green sheet 32, and the electrode A pattern 36 is formed.

  Here, as shown in FIG. 3, for example, the surface of the plate cylinder 22 is magnetized in both longitudinal portions 24 a of the recess 24, and the center region in the longitudinal direction of the recess 22 is not magnetized. As described above, since the vicinity of the surface of the recess 24 of the plate cylinder 22 is locally magnetized, the conductive paste 28 in the recess 24 is attracted to the plate cylinder 22 side at the magnetized portion. For this reason, in the facing portion between the plate cylinder 22 and the impression cylinder 30, the transfer amount of the conductive paste 28 on the magnetized portion of the concave portion 24 onto the ceramic green sheet 32 is small, and the portion of the concave portion 24 that is not magnetized. The transfer amount of the conductive paste 28 onto the ceramic green sheet 32 increases.

  In the case of this gravure printing apparatus 20, since it is magnetized except for the central region in the longitudinal direction of the rectangular recess 24, among the conductive paste 28, the conductive paste located in the central region in the longitudinal direction that is not magnetized. Is easily transferred to the ceramic green sheet 32, and the central portion of the conductive paste 28 in the longitudinal direction is thicker than its peripheral portion. In this way, the electrode pattern 36 is formed by transferring the conductive paste 28 to the ceramic green sheet 32, and as shown in FIG. 4, thin portions on both sides in the longitudinal direction of the electrode pattern 36 are used as the capacitor portion 36a. The thick portion at the center in the longitudinal direction is used as the drawer portion 36b.

  A plurality of ceramic green sheets 32 on which the electrode pattern 36 is formed are laminated. At this time, as shown in FIG. 5, the gap portion 38 between the electrode patterns 36 of one ceramic green sheet 32 and the lead-out portion 36b of the electrode pattern 36 of the adjacent ceramic green sheet 32 are overlapped with each other. Sheets 32 are laminated. Furthermore, a laminated body is formed by laminating and pressing the ceramic green sheets 32 without conductive paste on both sides thereof.

  The laminated body is cut at a predetermined dividing line to form a chip in which the drawn portions 36b of the electrode pattern 36 are alternately drawn at both ends. Here, the dividing line is set at a position where the drawing portion 36b is divided in the central region in the longitudinal direction that divides the electrode pattern 36 into two regions. The adjacent ceramic green sheets 32 are stacked such that the lead portion 36b of the electrode pattern 36 and the gap portion 38 overlap each other, so that the central region of the gap portion 38 between the electrode patterns 36 is also set as a dividing line. By firing the chip thus obtained, the internal electrodes 4a and 4b are opposed to each other with the ceramic layer 3 as shown in FIG. 13 interposed therebetween, and the substrate 2 with one end alternately drawn to the opposite end is formed. It is formed. For example, the obtained base 2 is baked and barrel-polished to expose the lead-out portions of the internal electrodes 4a and 4b, and the corners of the base 2 are rounded as necessary. Then, the conductive electrodes are applied to the end portions of the base 2 where the internal electrodes 4a and 4b are exposed, and the conductive paste is baked to form the external electrodes 5a and 5b.

  Thus, when the ceramic green sheet 32 on which the electrode pattern 36 is formed is laminated and pressure-bonded, as shown in FIG. 5, the gap portion 38 between the adjacent electrode patterns 36 on the ceramic green sheet 32 is adjacent to the adjacent ceramic green sheet. A plurality of ceramic green sheets 32 are laminated so as to be arranged in the thick lead portion 36b in the center of the electrode pattern 36 of the sheet 32. By laminating in this way, the gap portion 38 between the electrode patterns 36 and the thick lead portion 36b of the electrode pattern 36 overlap each other, and deformation of the electrode pattern 36 can be prevented. Therefore, by cutting the laminated body of the ceramic green sheets 32 in the central region of the lead portion 36b and the gap portion 38 of the electrode pattern 36 and firing the resulting chip, a substrate with less internal electrode distortion can be obtained. .

  As described above, when the conductive paste 28 is transferred onto the ceramic green sheet 32 so as to partially differ in thickness, the concave portion 24 of the plate cylinder 22 shown in FIG. 2 is not magnetized, as shown in FIG. The impression cylinder 30 may be partially magnetized. In this case, the plate cylinder 22 and the impression cylinder 30 are formed to have the same diameter, and a mechanism is provided in which they rotate in complete synchronization. As shown in FIG. 7, in the portion 40 corresponding to the concave portion 24 of the plate cylinder 22 in the impression cylinder 30, the portion 40a corresponding to the capacitor portion 36a of the electrode pattern 36 is not magnetized and corresponds to the lead portion 36b. Portion 40b is magnetized.

  In such a gravure printing apparatus 20, the region facing the concave portion of the plate cylinder 22 is locally magnetized in the impression cylinder 30, so that the ceramic green sheet 32 is electrically conductive between the plate cylinder 22 and the impression cylinder 30. When the conductive paste 28 is transferred, the conductive paste 28 in the central region in the longitudinal direction set so as to divide the recess 24 into two regions is strongly attracted to the ceramic green sheet 32 side. Therefore, the electrode pattern 36 formed by transferring the conductive paste 28 in a rectangular shape to the ceramic green sheet 32 is thicker than the other capacitor portion 36a in the center lead portion 36b in the longitudinal direction.

  As the electrode pattern 34, as shown in FIG. 8, an electrode pattern in which one figure becomes one electrode can be formed. In this electrode pattern 36, two electrode patterns 36 arranged close to each other form a pair, and in the longitudinal direction of the ceramic green sheet 32, a plurality of pairs of electrode patterns 36 are formed so as to line up with a gap portion 38. . In this case, the opposing end portions of a pair of adjacent electrode patterns 36 are the lead portions 36b formed thick, and the portions extending on both sides thereof are the capacitor portions 36a. When the ceramic green sheets 32 on which such electrode patterns 36 are formed are stacked, in the adjacent ceramic green sheets 32, the thickened lead portions 36b of a pair of adjacent electrode patterns 36 and the gap portions 38 overlap. To be arranged. Thereby, when the ceramic green sheets 32 are stacked, the deformation of the electrode pattern 36 is prevented. When such an electrode pattern 36 is formed, a gap 38 is set as a dividing line 42 between a pair of adjacent electrode patterns 36 and the laminated body is cut at the dividing line 42.

  When such an electrode pattern 36 is formed, a plurality of recesses 24 are formed in the width direction and the circumferential direction of the plate cylinder 22 as shown in FIG. Here, as shown in FIG. 10, in a pair of recesses 24 corresponding to a pair of adjacent electrode patterns 36, a portion 24 a excluding the opposing end portions 24 b of the pair of recesses 24 is magnetized. As a result, the conductive paste 28 held in the magnetized portion 24 a of the recess 24 is attracted to the plate cylinder 22 side, and the amount of the conductive paste 28 transferred to the ceramic green sheet 32 is reduced. Therefore, the electrode pattern 36 formed by transferring the conductive paste 28 to the ceramic green sheet 32 becomes thicker at the lead-out portion 36b that is the opposed portion of the pair of adjacent electrode patterns 36.

  Further, the plate cylinder 22 and the impression cylinder 30 are formed to have the same diameter, and are rotated so as to be synchronized with each other. As shown in FIG. 11, the portion 40 of the impression cylinder 30 corresponding to the recess 24 is formed. A part may be magnetized. In this case, as shown in FIG. 12, among the portion 40 corresponding to the concave portion 24 formed in the plate cylinder 22, the portion 40b corresponding to the drawing portion 36b of the pair of electrode patterns 36 adjacent to each other is magnetized, and the capacitance portion The portion 40a corresponding to 36a is not magnetized. Thereby, when the conductive paste 28 is transferred to the ceramic green sheet 32, the conductive paste 28 held in the recess 24 of the plate cylinder 22 is attracted to the ceramic green sheet 32 side in the magnetized portion of the impression cylinder 30. It is done. As a result, the conductive paste 28 can be transferred to the ceramic green sheet 32 so that the lead-out portion 36b, which is the opposed portion of the pair of adjacent electrode patterns 36, is thicker than the capacitor portion 36a.

  In this manner, the conductive paste 28 can be transferred onto the ceramic green sheet 32 by locally magnetizing the plate cylinder 22 or the impression cylinder 30 so that the thickness is partially different. Therefore, if the gravure printing apparatus 20 is used to form the electrode pattern 36 on the ceramic green sheet 32 and apply it to the production of a multilayer electronic component such as a multilayer ceramic capacitor, an electronic component with less distortion of the internal electrode can be obtained. Can do.

  In the above-described embodiment, the case where the conductive paste 28 is transferred onto the ceramic green sheet 32 has been described. However, a printing sheet other than the ceramic green sheet may be used, and a printing paste other than the conductive paste may be used. Needless to say, it is good. In this case, magnetic powder is added to the printing paste.

DESCRIPTION OF SYMBOLS 20 Gravure printing apparatus 22 Plate cylinder 24 Recessed part 26 Reservoir 28 Conductive paste 30 Impression cylinder 32 Ceramic green sheet 34 Blade 36 Electrode pattern 36a Capacitance part 36b Drawer part 38 Gap part 40 The part corresponding to a recessed part

Claims (6)

A plate cylinder provided with a concave portion having a printed pattern shape on the outer peripheral surface is supplied, and a printing paste containing magnetic powder is supplied into the concave portion, and held in the concave portion by bringing a printing sheet into contact with the plate cylinder. A gravure printing apparatus for transferring the printed paste to the printing sheet,
The surface of the said recessed part is magnetized locally, The gravure printing apparatus characterized by the above-mentioned.   The printing sheet is a ceramic green sheet, the printing paste is a conductive paste, the printing pattern is used as an internal electrode pattern, the concave portion is rectangular, and the rectangular concave portion is divided into two regions. The gravure printing apparatus according to claim 1, wherein a central region is provided, and a region other than the central region is magnetized.   The printing sheet is a ceramic green sheet, the printing paste is a conductive paste, the printing pattern is rectangular, the rectangular printing pattern is composed of a drawer part and a capacity part, and the drawer part is 2. The gravure printing apparatus according to claim 1, wherein the gravure printing apparatus is provided along one side of the rectangular print pattern, and the capacitor portion is magnetized in the concave portion. A plate cylinder provided with a concave portion in the form of a printing pattern on the outer peripheral surface; and an impression cylinder provided at a position facing the plate cylinder; and supplying a printing paste containing magnetic powder in the concave portion; A gravure printing apparatus for transferring the printing paste held in the recess to the printing sheet by bringing the printing sheet into contact with the plate cylinder by sandwiching the printing sheet between the cylinder and the impression cylinder There,
A gravure printing apparatus, wherein a region of the surface of the impression cylinder facing the concave portion is locally magnetized.   The sheet to be printed is a ceramic green sheet, the printing paste is a conductive paste, the printing pattern is used as an internal electrode, a region of the impression cylinder facing the recess is rectangular, and the rectangular The gravure printing apparatus according to claim 4, wherein the central region is locally magnetized so as to divide the shape region into two regions.   The printing sheet is a ceramic green sheet, the printing paste is a conductive paste, the printing pattern is rectangular, the rectangular printing pattern is composed of a drawer part and a capacity part, and the drawer part is 5. The rectangular printing pattern is provided along one side, and the portion of the impression cylinder that contacts the printing sheet and corresponds to the drawing portion is magnetized. A gravure printing apparatus according to 1.

Images