KR100847665B1 - Gravure printing press and process for fabricating multilayer ceramic electronic component - Google Patents

Abstract

Provided is a gravure printing machine capable of forming a conductive paste film excellent in smoothness by gravure printing. In the underlined portion 13 formed on the main surface of the gravure roll 2, a plurality of cells 17 partitioned by the printing direction wall 15 and the vertical direction wall 16 are formed, and the vertical direction wall ( A plurality of notches 18 are provided in 16). In addition, in the central portion of the wire line portion 13, most of the portion where the printing direction wall 15 and the vertical direction wall 16 intersect, the vertical direction wall 16 does not penetrate the printing direction wall 15, It consists of the T-shaped intersection part 19 which intersects a shape. Preferably, a round chamfer is added to a portion of a corner where a portion of the printing direction wall 15 and a portion of the vertical direction wall intersect, and a tip of the vertical direction wall 16 facing the notch 18. do.

Gravure printing machine, laminated ceramic, electronic parts, smoothness, printing stain

Description

GRAVURE PRINTING PRESS AND PROCESS FOR FABRICATING MULTILAYER CERAMIC ELECTRONIC COMPONENT}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gravure printing machine and a method for manufacturing a multilayer ceramic electronic component implemented using the same, and more particularly, to a technique for improving the smoothness of a paste film formed by gravure printing.

In order to manufacture a multilayer ceramic electronic component such as a multilayer ceramic capacitor, a process of forming a conductive paste film serving as an internal electrode on a ceramic green sheet, for example, is performed. The internal electrode provided by this conductive paste film is required to have high pattern precision. Gravure printing has attracted attention as a technique capable of satisfying this demand (see Patent Document 1, for example).

In patent document 1, it aims at equalizing the thickness in the outer peripheral part of the paste film formed by gravure printing, and is formed in the wire part to which the printing paste formed on the main surface of a gravure roll is given. For a plurality of cells, it is described that the opening area of the cell in the outer peripheral part is made smaller than the opening area of the cell in the central part, but the depth of the cell in the outer peripheral part is shallower than the depth of the cell in the central part. .

However, in the patent document 1, since each cell formed in a wire line part is independent from each other, the ratio of the area of the cell part with respect to the area of the whole wire line part is comparatively low, and it is between neighboring cells at the time of printing. Since no flow of the printing paste can be produced, it is not particularly suitable for printing for forming a paste film having a relatively large area, and printing unevenness is likely to occur.

As a solution to the above-mentioned problems, the application of the electronic component is not intended, but the wall defining the plurality of cells formed on the wire line part is arranged so as to extend inclined with respect to the printing direction, and the cells are adjacent to each other. In order to make a communication state between things, what provided the notch in the wall which divides each cell is proposed (for example, refer patent document 2).

According to the technique described in Patent Document 2 described above, the ratio of the area of the area (that is, the cell and the cutout) that can hold the print paste to the area of the entire wire line portion can be increased, and the flow of the print paste through the cutout You can expect.

However, in the technique described in Patent Literature 2, it is an essential requirement that the gap between the scratches is smaller than the width of the wall. Thus, for example, when a printing paste having a relatively high viscosity such as a conductive paste is used, this printing is performed. The flow between the paste neighboring cells is limited. As a result, traces of cells may remain on the printed paste film, or a smooth paste film may not be formed.

In addition, in the technique described in Patent Literature 2, since the walls defining the plurality of cells formed in the wire line part are arranged to extend in an inclined direction with respect to the printing direction, so-called printing paste when the printed sheet is separated from the gravure roll. Cobwebbing occurs in an inclined direction with respect to the printing direction, that is, the direction in which the main surface of the gravure roll moves, and local irregularities are likely to occur in the peripheral shape of the printed paste film.

In addition, even if the above-mentioned slipping occurs in the inclined direction with respect to the printing direction, the direction is not constant, and therefore, the printing pastes in the slipping state in a plurality of places may merge with each other and integrate. This causes the variation in the thickness of the paste film.

Patent Document 1: Japanese Patent Application Laid-Open No. 9-76459

Patent Document 2: Japanese Utility Model Registration Application Publication No. Hei 5-41015

Therefore, an object of the present invention is to provide a gravure printing machine that can solve the above problems and a method of manufacturing a multilayer ceramic electronic component implemented using the same.

A gravure printing press for forming a paste film by gravure printing on a printed sheet is a first object.

This gravure printing machine is equipped with the gravure roll which forms the wire part to which the printing paste which gives a paste film | membrane is provided on the main surface.

In order to solve the above-mentioned technical problem in the gravure printing machine which has such a structure, it is characterized by including the following structures.

That is, the firing line portion is provided with a printing direction wall extending substantially in the printing direction and a vertical wall extending substantially perpendicular to the printing direction wall, and a plurality of cells partitioned by the printing direction wall and the vertical direction wall are formed. . In order to bring the cells adjacent to each other in the printing direction into a communication state, a recess is provided in the vertical wall. Further, the printing direction wall and the vertical direction wall form an intersection portion which intersects each other, and the intersection portion includes a T-shaped intersection portion in which the vertical direction wall does not penetrate the printing direction wall and crosses in a T shape.

In addition, as described above, the extending direction of the printing direction wall is almost the printing direction, and the extending direction of the vertical direction wall is almost perpendicular to the printing direction wall, respectively, ± 5 degrees with respect to the printing direction and the vertical direction, respectively. This is because there is a tolerance range.

It is preferable that the above T-shaped intersection part is distributed in at least the center part of a wire line part. In this case, it is preferable that more than half of the intersection located at the center of the wire line portion be a T-shaped intersection. Most preferably, the intersections located at the center of the caustic line are all T-shaped intersections.

It is preferable that a round or a chamfer is added to the portion of the edge where the part of the printing direction wall and the part of the vertical direction wall in the intersection cross each other.

In the center part of a wire line part, it is preferable that the clearance gap mentioned above becomes larger than each width | variety of a printing direction wall and a vertical direction wall.

It is preferable that a chamfer by a round or a slope is added to the front end of the vertical wall facing the flaw.

It is preferable that the printing direction wall is provided so as to extend substantially from the printing start end to the printing end in the line part. The fact that the printing direction wall extends substantially continuously means that the printing direction wall may be cut several places along the way, and for example, a groove may be formed at the beginning or end of printing. .

It is preferable that the above-mentioned flaws adjacent to each other in the printing direction have different positions in the vertical direction with respect to the printing direction. In this case, it is more preferable that the flaws are located at portions of two corners facing the diagonal direction of each cell.

The gravure printing machine according to the present invention is particularly preferably used for producing laminated ceramic electronic components. In this case, the patterned layer which forms a part of the laminated structure with which a laminated ceramic electronic component is equipped becomes a paste film formed by the gravure printing machine. Therefore, this invention also aims at the manufacturing method of the laminated ceramic electronic component implemented using the above-mentioned gravure printing machine.

In the manufacturing method of the multilayer ceramic electronic component which concerns on this invention, it is preferable to use gravure printing in order to form the electrically conductive paste film used as an internal electrode. That is, it is preferable that a conductive paste is used as the above-mentioned printing paste, and the paste film formed by the printing paste is a conductive paste film serving as an internal electrode.

In the above case, the above-mentioned printed sheet is preferably a ceramic green sheet. The printed sheet may be a resin sheet such as a carrier film.

Effect of the Invention

As described above, according to the gravure printing machine according to the present invention, the wire portion formed on the main surface of the gravure roll is provided with a printing direction wall and a vertical direction wall, and a plurality of cells partitioned by the printing direction wall and the vertical direction wall. In order to make communication between neighbors, the vertical wall is provided with a cutout, so as a printing paste, for example, a metal content is relatively high, and therefore, a conductive paste having a relatively high viscosity may be used. The printing paste can be satisfactorily flown between neighboring cells. As a result, the unevenness of the surface of the paste film formed by gravure printing can be reduced, and the thickness of the paste film can be made uniform.

In addition, since the printing direction wall extends almost in the printing direction, the direction of the printing paste slip when the printed sheet is separated from the gravure roll is substantially limited to the printing direction, and is not inclined. This also contributes to the same thickness of the paste film formed by gravure printing and at the same time makes it difficult to generate local irregularities that may occur in the peripheral shape of the printed paste film.

In addition, the printing direction wall and the vertical direction wall form an intersection where they cross each other, and the intersection part intersects in the T shape without the vertical wall passing through the printing direction wall (i.e., not forming a cross-shaped intersection). Since the T-shaped intersections are included, the number of intersections can be increased when compared within the same area as compared with the cross-shaped intersections alone. As a result, the uniformity of the distribution of the openings provided by the cells can be achieved. This also contributes to the smoothing of the surface of the paste film formed by gravure printing. This is because the probability that the slippages generated from a plurality of places join and integrate with each other can be reduced.

The above-described effect of the T-shaped cross section is more reliably exhibited when the T-shaped cross section is distributed in at least the center portion of the wire. In order to more clearly demonstrate the effect of the T-shaped cross section, more than half of the cross section located in the center of the ship line is more preferably a T-shaped cross section. When all are T-shaped intersections.

If a chamfer by a round or a slope is added to the part of the edge where the part of the printing direction wall and the part of the vertical wall at the intersection cross each other, the printing paste can flow better between neighboring cells. At the same time, the flow of slipping can be generated more smoothly. As a result, it can contribute to the smoothing of one layer of the paste film formed by gravure printing. In addition, the effect of facilitating the cleaning of the wire can be expected.

In the center part of a wire line part, if the space | interval of a notch is larger than each width | variety of a printing direction wall and a vertical direction wall, printing paste can flow more favorable between neighboring cells. Therefore, this also contributes to making the thickness of the paste film formed by gravure printing the same.

If a chamfer by a round or slope is added to the distal end of the vertical wall facing the flaw, the round or slope of the chamfer by the round or the slope at the portion where the above-mentioned part of the printing direction wall and the part of the vertical wall cross each other. As in the case, the printing paste can be better flowed between neighboring cells, and the flow of slipping can be generated more smoothly. As a result, it can contribute to the smoothing of one layer of the paste film formed by gravure printing.

In the gravure printing machine according to the present invention, if the printing direction wall is provided so as to extend substantially continuously from the printing start end to the printing end in the wire line portion, the printing paste is in the printing direction only in the range surrounded by the printing direction wall. Since it flows, the effect of suppressing the occurrence of irregularities on the surface of the paste film is large. Therefore, uniformity of the thickness of the paste film formed by gravure printing can be more reliably achieved.

Further, when the positions in the vertical direction with respect to the printing direction are different from each other in the printing directions adjacent to each other, more preferably, the cuttings are located at portions of two corners facing each other in the diagonal direction of each cell. When the extra printing paste on the main surface of the gravure roll is scraped off by the blades, even the fluorine net is scraped up to the printing paste which should be kept in each cell, thereby advantageously preventing the paste film from being partially thinned. In addition, the printing paste slipping when the printed sheet is separated from the gravure roll proceeds continuously through the flaw. Therefore, as described above, if the positions of neighboring grooves are shifted from the vertical direction with respect to the printing direction, the irregularities on the surface of the paste film which may be caused by the printing paste slippage can be suppressed.

In view of the above, when applied to the manufacture of multilayer ceramic electronic components using the gravure printing machine as described above, the characteristics of the obtained multilayer ceramic electronic components can be made stable, and the occurrence of defective products can be suppressed, Can improve the product ratio.

In particular, if the conductive gravure film to be an internal electrode included in the multilayer ceramic electronic component is formed by the gravure printing machine according to the present invention, the thickness of the conductive paste film can be made uniform. It is possible to prevent the occurrence of or inferior insulation resistance.

1 is a front view schematically showing a gravure printing machine 1 according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a state where the conductive paste film 9 is formed on the ceramic green sheet 8 pasted by the carrier film 10 as the printed sheet 3 by the gravure printing machine 1 shown in FIG. 1. to be.

3 is a perspective view showing the gravure roll 2 shown in FIG. 1 alone.

FIG. 4 is a developed view of the main surface of the gravure roll 2 in which one wire line 13 shown in FIG. 3 is enlarged.

FIG. 5 is an enlarged view of a part of the wire line 13 shown in FIG. 4.

FIG. 6 is a diagram corresponding to a part of FIG. 5 for describing the second embodiment of the present invention. FIG.

FIG. 7 is a diagram corresponding to FIG. 5 for describing a third embodiment of the present invention. FIG.

FIG. 8 is a diagram corresponding to FIG. 5 for describing a fourth embodiment of the present invention. FIG.

FIG. 9 is a diagram corresponding to FIG. 5 for describing a fifth embodiment of the present invention. FIG.

FIG. 10 is a diagram corresponding to FIG. 5 for describing the sixth embodiment of the present invention. FIG.

FIG. 11 is a diagram corresponding to FIG. 4 for describing the seventh embodiment of the present invention. FIG.

<Description of the code>

1: gravure printing machine 2: gravure roll

3: printed sheet 8: ceramic green sheet

9: conductive paste film 12: conductive paste

13: wire part 15: printing direction wall

16: vertical wall 17: cell

18,18a: Gap 19: T-shaped intersection

20,21: Chamfer by round 25,26: Chamfer by slope

29: cross intersection

1 is a front view schematically showing a gravure printing machine 1 according to a first embodiment of the present invention.

The gravure printing press 1 is provided with the gravure roll 2 and the pressure 4 which opposes the printed sheet 3 with respect to the gravure roll 2. These gravure rolls 2 and the pressing 4 rotate in the directions of arrows 5 and 6, respectively, whereby the printed sheet 3 is conveyed in the direction of arrow 7. There may also be a gravure press that does not have a pressure, as in the case of a gravure flatbed press.

The gravure printing machine 1 is used to manufacture multilayer ceramic electronic components such as, for example, multilayer ceramic capacitors. More specifically, the gravure printing press 1 is used to form a paste film, which should be a patterned layer that forms part of the laminated structure included in the multilayer ceramic electronic component, by gravure printing on the printed sheet 3. More specifically, as shown in Fig. 2, a conductive paste film 9, which is to be an internal electrode patterned on the ceramic green sheet 8, is formed by gravure printing.

As shown in FIG. 2, the ceramic green sheet 8 is in a state of being pasted by the carrier film 10. Therefore, the printed sheet 3 shown in FIG. 1 is the ceramic green sheet 8 pasted by the carrier film 10 in this way.

As shown in FIG. 1, the gravure roll 2 is immersed in the conductive paste 12 accommodated in the tank 11, whereby a plurality of wire portions 13 (part of which are formed on the main surface of the gravure roll 2). Is schematically shown). The detail of the wire line part 13 is mentioned later. In addition, the supply of the conductive paste 12 to the gravure roll 2 may be performed by a method such as injecting the conductive paste 12 toward the gravure roll 2. The extra conductive paste 12 on the main surface of the gravure roll 2 is scraped off by the doctor blade 14.

Only the representative part of the wire line 13 has a pattern corresponding to the pattern of the conductive paste film 9 shown in FIG. 2, as schematically shown in FIG. In this embodiment, the longitudinal direction of the wire line part 13 faces the circumferential direction of the gravure roll 2.

4 shows an enlarged view of one wire line portion 13. It is an expanded view of the main surface of the gravure roll 2. In FIG. 4, the printing direction is shown by the arrow, and this printing direction corresponds to the arrow 5 shown in FIG. More specifically, the upper end side in FIG. 4 of the wire line part 13 is the printing start end side, and the lower end side is the printing end side. Therefore, in the printing process, the area which contacts the printed sheet 3 of the wire line part 13 changes its position from the upper end side to the lower end side in FIG.

The line portion 13 is provided with a plurality of printing direction walls 15 extending in the printing direction and a plurality of vertical direction walls 16 extending in the vertical direction with respect to the printing direction wall 15. Then, a plurality of cells 17 are formed, which are partitioned by the printing directional wall 15 and the vertical directional wall 16.

Regarding the opening areas of the plurality of cells 17 as described above, the cells 17A located at the periphery of the wire line portion 13 are smaller than the cells 17B located at the center of the wire line portion 13. . In order to reduce the opening area of the cell 17A located at the periphery, each portion of the printing direction wall 15 and the vertical direction wall 16 located at the periphery of the wire line portion 13 is wider than other portions. It is bigger than this. By employing such a configuration, it is possible to make it difficult to generate so-called "saddle phenomenon" as described below.

In general, when a paste film is formed by applying gravure printing, a so-called "saddle phenomenon" is likely to occur in which the periphery of the paste film becomes thicker than the center portion. When a multilayer ceramic electronic component is manufactured using a conductive paste film having such a "saddle phenomenon", a short defect or structural defect may be caused. The configuration as described above is effective in suppressing such "saddle phenomenon".

FIG. 5 is an enlarged view of a part of the wire line 13 shown in FIG. 4.

As shown in FIG.4 and FIG.5, the notch 18 is provided in the vertical direction wall 16, and thereby, the cell 17 adjacent to a printing direction will be in communication. In this embodiment, the vertical wall 16 is intermittently extended by interposing the notches 18 in the vertical direction with respect to the printing direction.

The printing direction wall 15 and the vertical direction wall 16 form intersections with each other. In this embodiment, the intersection portion constitutes a T-shaped intersection portion 19 in which the vertical wall 16 intersects in the T shape without penetrating the printing direction wall 15. In other words, in this embodiment, the intersections are all T-shaped intersections 19.

Also, as shown in FIG. 5, a chamfer is rounded at a corner of a portion of the printing direction wall 15 and a portion of the vertical direction wall 16 intersecting each other in the T-shaped intersection 19. (20) is added. A round chamfer 21 is also added to the front end of the vertical wall 16 facing the groove 18.

In addition, although not employ | adopted in this embodiment, it is preferable to add the chamfer mentioned above even if the vertical direction wall 16 is formed so that the printing direction wall 15 may penetrate, and a cross shape cross part is formed. .

As shown in FIG.4 and FIG.5, in the center part of the wire line part 13, the space | interval of the notch 18 becomes larger than each width | variety of the printing direction wall 15 and the vertical direction wall 16. As shown in FIG. For example, the width | variety of the notch 18 becomes 20-40 micrometers, compared with each width | variety of the printing direction wall 15 and the vertical direction wall 16 being 5-20 micrometers.

By adopting these configurations, even in the case of the conductive paste 12 (see Fig. 1) having a high viscosity such as, for example, 0.1 to 40 Pa · s, a certain flow smoothly occurs in the printing direction, as compared with general gravure inks. In the electrically conductive paste film 9, the smooth surface and uniform thickness can be obtained reliably.

As shown in FIG. 4, each printing direction wall 15 extends substantially continuously from the printing start end to the printing end in the line part 13. As shown in FIG.

By employing such a configuration, the conductive paste 12 can be smoothly flowed between neighboring cells 17, so that the conductive paste 12 can be uniformly flowed in the printing direction. Further, the so-called slippage of the conductive paste 12 when the printed sheet 3 is separated from the gravure roll 2 occurs as regulated in the printing direction, as indicated by the arrow 22 in the broken line in FIG. There is no occurrence, and it is possible to make it difficult to generate local irregularities in the peripheral shape of the printed conductive paste film 9 (see Fig. 2).

In addition, the flaws 18 adjacent to each other with respect to the printing direction have different positions in the vertical direction with respect to the printing direction. Especially in this embodiment, the notch 18 is located in the part of two edge | corners which oppose the diagonal direction of each cell 17. As shown in FIG.

By adopting such a configuration, when the extra conductive paste 12 on the main surface of the gravure roll 2 is scraped off by the doctor blade 14, the conductive paste 12 which must remain in each cell 17 even if it is not desired. ), The conductive paste film 9 can be advantageously prevented from being partially thinned.

In addition, slippage of the conductive paste 12 when the printed sheet 3 is separated from the gravure roll 2 proceeds continuously via the cut 18. Therefore, if the positions of the neighboring portions of the notches 18 are shifted from each other in the vertical direction with respect to the printing direction as described above, the surface of the conductive paste film 9 which may be caused by the dragging of the conductive paste 12 is formed. Unevenness in a part can be suppressed.

When the conductive paste film 9 is formed by the gravure printing machine 1 having the above configuration, the conductive paste film 9 should be smooth over the entire surface and excellent in the linearity of the outline of the outer circumference. Can be.

After using the gravure printing machine 1 to obtain the ceramic green sheet 8 on which the conductive paste 9 is formed as shown in FIG. 2, the plurality of ceramic green sheets 8 are laminated and pressed, as necessary. It is cut and then fired to obtain a laminated structure that becomes a component body for laminated ceramic electronic components. In this laminated structure, the above-mentioned conductive paste film 9 constitutes an internal electrode. Next, if necessary, external electrodes or the like are formed on the outer surface of the laminated structure to complete the desired multilayer ceramic electronic component.

In such a multilayer ceramic electronic component, as described above, since the conductive paste film 9 is formed smoothly throughout, the stress does not locally concentrate in the crimping process, so that the internal electrode is a ceramic layer. It is possible to prevent short defects such as contacting through or to locally reduce the thickness of the ceramic layer to cause poor insulation resistance.

FIG. 6 is a diagram corresponding to a part of FIG. 5 for describing the second embodiment of the present invention. FIG. In Fig. 6, elements corresponding to those shown in Fig. 5 are given the same reference numerals, and redundant descriptions are omitted.

In the second embodiment shown in FIG. 6, a chamfer formed by a slope is formed at a portion of a corner where a part of the printing direction wall 15 and a part of the vertical direction wall 16 intersect each other in the T-shaped intersection 19. 25 is added, and the chamfer 26 by the slope is added to the front-end | tip part of the vertical wall 16 facing the notch 18. As shown in FIG. The chamfers 25 and 26 by these slopes perform the same function as the chamfers 20 and 21 by the round in 1st Embodiment.

7 and 8 are diagrams corresponding to FIG. 5 for describing the third and fourth embodiments of the present invention, respectively. In Figs. 7 and 8, the elements corresponding to those shown in Fig. 5 are given the same reference numerals, and overlapping descriptions are omitted.

In the first embodiment shown in FIG. 5, the planar shape of the cell 17 is substantially square, whereas in the third embodiment shown in FIG. 7, the cell 17 is a rectangular plane in the longitudinal direction in the printing direction. In the fourth embodiment shown in FIG. 8, the cell 17 has a rectangular rectangular planar shape in a direction perpendicular to the printing direction. About features other than the planar shape of these cells 17, 3rd and 4th embodiment have the feature common to 1st embodiment.

9 is a diagram corresponding to FIG. 5 for describing a fifth embodiment of the present invention. In FIG. 9, the same reference numerals are added to elements corresponding to those shown in FIG. 5, and redundant descriptions are omitted.

In the fifth embodiment shown in Fig. 9, in the printing direction of the vertical wall 16, while maintaining the feature that the intersection constitutes the T-shaped intersection 19 as compared with the case of the first embodiment. The location has changed. As a result, the cells 17 are not necessarily aligned with respect to the direction perpendicular to the printing direction. About the other characteristic of 1st Embodiment, this 5th Embodiment is also provided.

FIG. 10 is a diagram corresponding to FIG. 5 for describing the sixth embodiment of the present invention. FIG. In Fig. 10, the same reference numerals are given to elements corresponding to those shown in Fig. 5, and redundant descriptions are omitted.

In the sixth embodiment shown in FIG. 10, as in the case of the fifth embodiment, the cells 17 are arranged side by side in a zigzag shape with respect to the direction perpendicular to the printing direction.

Further, in the sixth embodiment, the neighboring grooves as well as the neighboring grooves 18 provided so as to be located between the one end of the vertical wall 16 and the printing direction wall 15 in relation to the grooves provided in the vertical wall 16 are adjacent to each other. It also has the notch 18a provided so that it may be located in the center part between the printing direction walls 15. FIG.

Other features in the first embodiment also have this sixth embodiment.

FIG. 11 is a diagram corresponding to FIG. 4 for describing the seventh embodiment of the present invention. FIG. In Fig. 11, the same reference numerals are given to elements corresponding to those shown in Fig. 4, and redundant descriptions are omitted.

In the seventh embodiment shown in FIG. 11, all the T-shaped intersections are used for the intersections located at the center of the wires 13, but the crosses of the crosses are located at the periphery of the wires 13. 29). This means that it is important for the T-shaped cross section 19 to be provided at the center of the wire line portion 13.

In addition, although it is most preferable that all the intersection parts located in the center part of the wire line part 13 are T-shaped intersection parts 19, the cross intersection part may be formed in one part. Thus, when the T-shaped cross section and the cross-crossing part are mixed, it is preferable that more than half are T-shaped cross parts.

In the seventh embodiment described above, other features have the same characteristics as in the case of the first embodiment.

As mentioned above, although this invention was demonstrated with respect to embodiment shown, various other modifications are possible within the scope of this invention.

For example, in the illustrated embodiment, the wire line portion 13 has a rectangular shape, but the shape of the wire line portion can be arbitrarily changed according to the pattern of the conductive paste film 9 to be formed by gravure printing.

In the illustrated embodiment, the printed sheet 3 is the ceramic green sheet 8 pasted by the carrier film 10, and the conductive paste film 9 is formed on the ceramic green sheet 8. For example, only the resin sheet like the carrier film 10 may be used as the printed sheet 3 as the printed sheet, and the conductive paste film 9 may be formed on the resin sheet. In this case, the conductive paste film 9 formed on the resin sheet is transferred onto the ceramic green sheet 8 in a subsequent step.

In addition, although the paste film formed by gravure printing was the electrically conductive paste film 9 in embodiment of illustration, the film which consists of a paste-like thing, such as a ceramic slurry, for example may be sufficient. More specifically, for example, in a multilayer ceramic capacitor or the like, in order to absorb a step due to the thickness of the internal electrode, a ceramic layer for absorbing the step may be formed in a region where the internal electrode is not formed. This invention can also be applied to the case where a paste film made of a ceramic slurry should be formed.

Claims (17)

A gravure printing machine for forming a paste film by gravure printing on a printed sheet, A gravure roll is formed on the main surface of which a wire line portion to which the printing paste to which the paste film is applied is applied is provided. The wire portion is provided with a printing direction wall extending substantially in the printing direction and a vertical direction wall extending substantially perpendicular to the printing direction wall, and a plurality of cells partitioned by the printing direction wall and the vertical direction wall. Is formed, In order to make communication between the cells adjacent to the printing direction, a cutout is provided in the vertical wall, The printing direction wall and the vertical direction wall form an intersection portion that crosses each other, and the intersection portion includes a T-shaped intersection portion in which the vertical direction wall crosses in a T shape without penetrating the printing direction wall. Gravure printing machine characterized in that. The gravure printing machine according to claim 1, wherein the T-shaped intersections are distributed in the central portion of the wire line portion. The gravure printing machine according to claim 2, wherein at least half of the intersection located at the center of the wire portion is the T-shaped intersection. The gravure printing machine according to claim 3, wherein all of the intersections located at the center of the wire line are the T-shaped intersections. The chamfer according to claim 1, wherein a part of the corner at which the part of the printing direction wall and the part of the vertical direction wall intersect each other is rounded or oblique. A gravure printing machine characterized in that it is added. The gravure printing machine according to claim 1, wherein an interval between said cutouts in said central portion of said wire line portion is larger than each width of said printing direction wall and said vertical direction wall. The gravure printing machine according to claim 1, wherein a chamfer formed by a round or a slope is added to a tip portion of the vertical wall facing the cut. The gravure printing machine according to claim 1, wherein the printing direction wall is provided so as to extend continuously from the printing start end to the printing end in the line portion. The gravure printing machine according to claim 1, wherein the cutouts adjacent to each other in the printing direction have different positions in the vertical direction with respect to the printing direction. 10. The gravure printing machine according to claim 9, wherein the cutout is located at a part of two corners facing the diagonal direction of each of the cells. The gravure printing machine according to claim 1, wherein the gravure printing machine is used for manufacturing a multilayer ceramic electronic component, and the paste layer is a patterned layer that forms part of a laminated structure included in the multilayer ceramic electronic component. The manufacturing method of the multilayer ceramic electronic component characterized by carrying out using the gravure printing machine of Claim 11. The method for manufacturing a multilayer ceramic electronic component according to claim 12, wherein a conductive paste is used as the printing paste, and the paste film is a conductive paste film serving as an internal electrode. The method of claim 13, wherein the printed sheet is a ceramic green sheet. The method of claim 13, wherein the printed sheet is a resin sheet. It is a gravure roll provided in the gravure printing machine for forming a paste film by gravure printing on a to-be-printed sheet, A caustic line portion to which a printing paste for imparting the paste film is applied is formed on a main surface thereof, The wire portion is provided with a printing direction wall extending substantially in the printing direction and a vertical direction wall extending substantially perpendicular to the printing direction wall, and a plurality of cells partitioned by the printing direction wall and the vertical direction wall. Is formed, In order to make communication between the cells adjacent to the printing direction, a cutout is provided in the vertical wall, The printing direction wall and the vertical direction wall form an intersection portion that crosses each other, and the intersection portion includes a T-shaped intersection portion in which the vertical direction wall crosses in a T shape without penetrating the printing direction wall. Gravure rolls characterized in that. The gravure printing machine according to claim 1, wherein in each of the plurality of cells, the printing direction wall extends in the printing direction without interruption in a portion where the vertical direction wall is installed.

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