JP2012009562A - Method and apparatus for generating unbaked conductor layer print sheet for laminated electronic component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for generating an unbaked conductor layer print sheet for a laminated electronic component, capable of securing high dimension accuracy in the contour, the thickness, etc. of respective unbaked conductor layers constituting a first unbaked conductor layer group and a second unbaked conductor layer group.SOLUTION: By changing a Y-direction position of a flat-sheet shaped concave plate IP, having a plurality of formed concave portions arrayed in a predetermined manner, a concave region corresponding to the printing of a first unbaked conductor layer group PP1 and a concave region corresponding to the printing of a second unbaked conductor layer group PP2 are selected. Then, on the surface of a belt-shaped green sheet GS, the first unbaked conductor layer group PP1 and the second unbaked conductor layer group PP2 are alternately printed along the sheet lengthwise direction.

Description

  The present invention relates to an unfired conductor layer printed sheet used in the manufacture of multilayer electronic components such as multilayer ceramic capacitors and multilayer inductors, and more specifically, a first green conductor layer having a different arrangement on the surface of a strip-shaped green sheet. The present invention relates to a method and an apparatus for producing an unfired conductor layer printed sheet in which groups and second unfired conductor layer groups are alternately printed along the sheet length direction.

  Multilayer electronic components such as multilayer ceramic capacitors and multilayer inductors are usually manufactured through a “sheet laminating process”, a “laminated body cutting process”, a “chip firing process”, and a “terminal creating process”.

  The “sheet laminating step” is a step in which a predetermined number of first laminating sheets and second laminating sheets are alternately stacked, and a predetermined number of third laminating sheets are stacked on the upper and lower sides thereof, and the layers are thermocompression bonded together. The first laminating sheet and the second laminating sheet are a plurality of green sheets on the surface of a predetermined size green sheet including a dielectric ceramic material powder, an insulator ceramic material powder, a magnetic material powder or the like and a binder. The conductor layer (conductor paste layer) is printed in a predetermined arrangement, and the unfired conductor layer group of the first lamination sheet and the unfired conductor layer group of the second lamination sheet have different arrangements. . Further, the third lamination sheet is a green sheet having the same size as the green sheets constituting the first lamination sheet and the second lamination sheet, and the unfired conductor layer is not printed.

  The first laminating sheet and the second laminating sheet used in the “sheet laminating step” are taken out from a previously produced unfired conductor layer printed sheet by a technique such as punching or cutting. This green conductor layer printed sheet is produced by alternately printing differently arranged first green conductor layer groups and second green conductor layer groups along the sheet length direction on the surface of the belt-shaped green sheet. Yes.

  A screen printing method is generally used for printing the first unfired conductor layer group and the second unfired conductor layer group. Recently, for the purpose of improving production efficiency, a gravure printing method has been used instead of the screen printing method. Use is under consideration (see Patent Documents 1 and 2). The gravure printing method can be roughly divided into a direct gravure printing method and an offset gravure printing method, and any of them uses a cylindrical intaglio plate having a plurality of concave portions formed on the outer peripheral surface.

  In the case of a cylindrical intaglio, each recess is processed on the outer peripheral surface of the cylindrical base by a technique such as cutting or etching, but the outer peripheral surface to be processed is a curved surface having a predetermined radius of curvature. It is difficult to finish with high precision. In other words, since it is difficult to ensure high dimensional accuracy in each recess, the conductor paste filled in each recess is removed and transferred to the surface of the belt-like green sheet (transfer to the surface of the transfer roll in the offset gravure printing method). As a result, it is difficult to ensure high dimensional accuracy in the outline and thickness of each unfired conductor layer constituting each of the first unfired conductor layer group and the second unfired conductor layer group. Become.

  In the case of a cylindrical intaglio, the desired printing is performed by directly transferring the conductive paste filled in the concave portion on the outer peripheral surface to the surface of the belt-shaped green sheet (the surface of the transfer roll in the offset gravure printing method) Since the concave portion is formed on the outer peripheral surface (curved surface having a predetermined radius of curvature), it is difficult to ensure high dimensional accuracy in the concave portion. As a result, it becomes difficult to ensure high dimensional accuracy in the contours and thicknesses of the respective unfired conductor layers constituting each of the first unfired conductor layer group and the second unfired conductor layer group.

JP 2005-197331 A JP 2007-049193 A

  An object of the present invention is for a multilayer electronic component capable of ensuring high dimensional accuracy in the contour and thickness of each unfired conductor layer constituting each of the first unfired conductor layer group and the second unfired conductor layer group. An object of the present invention is to provide a method and an apparatus for producing an unfired conductor layer printed sheet.

  In order to achieve the above object, according to the manufacturing method of the present invention, differently arranged first unfired conductor layer groups and second unfired conductor layer groups are printed alternately along the sheet length direction on the surface of the belt-shaped green sheet. In the method for producing an unfired conductor layer printed sheet for a multilayer electronic component, the plurality of recesses are formed in a predetermined arrangement on a plane and are movable in a direction perpendicular to the sheet length direction of the belt-shaped green sheet Using a plate-like intaglio, (1) by moving the plate-like intaglio in a direction perpendicular to the sheet length direction, a plurality of depressions except for one portion in the direction perpendicular to the sheet length direction are printed. A step of printing the first unfired conductor layer group by directly transferring the conductor paste filled in the recesses to the surface of the belt-shaped green sheet, and (2) a flat intaglio in the sheet length direction. straight The concave portion excluding the other portion in the direction orthogonal to the sheet length direction among the plurality of concave portions can be used for printing, and the conductive paste filled in the concave portion is applied to the surface of the belt-like green sheet. The step of directly transferring and printing the second unfired conductor layer group is alternately repeated.

  In addition, the production apparatus according to the present invention is a stacked type in which differently arranged first unfired conductor layer groups and second unfired conductor layer groups are alternately printed along the sheet length direction on the surface of the belt-shaped green sheet. In an apparatus for producing an unfired conductor layer printed sheet for electronic components, (1) a plurality of recesses are formed in a predetermined arrangement on a plane, and the conductor paste filled in the recesses is directly transferred to the surface of the belt-like green sheet (2) a power source for moving the flat intaglio plate in a direction perpendicular to the sheet length direction of the belt-shaped green sheet; and (3) filling a plurality of concave portions of the flat intaglio plate with a conductive paste. And a paste feeder for the purpose.

  According to the present invention, it is possible to secure high dimensional accuracy in the contour and thickness of each unfired conductor layer constituting each of the first unfired conductor layer group and the second unfired conductor layer group. A method and apparatus for producing an unfired conductor layer printed sheet can be provided.

  The above object and other objects, structural features, and operational effects of the present invention will become apparent from the following description and the accompanying drawings.

FIG. 1 is an overall configuration diagram of an “unfired conductor layer printed sheet producing apparatus” to which the present invention is applied. FIG. 2 is a detailed view of the flat intaglio shown in FIG. FIG. 3 is a view for explaining a first step of “a method for producing an unfired conductor layer printed sheet” based on the “device for producing an unfired conductor layer printed sheet” shown in FIG. FIG. 4 is a view for explaining a second step of “a method for producing an unfired conductor layer printed sheet” by the “device for producing an unfired conductor layer printed sheet” shown in FIG. FIG. 5 is a view for explaining a third step of “a method for producing an unfired conductor layer printed sheet” by the “device for producing an unfired conductor layer printed sheet” shown in FIG. FIG. 6A shows the positional relationship between the flat intaglio and the green sheet in the second step, and FIG. 6B shows the arrangement of the first unfired conductor layer group printed on the green sheet in the third step. FIG. FIG. 7 is a view for explaining a fourth step of “a method for producing an unfired conductor layer printed sheet” by the “device for producing an unfired conductor layer printed sheet” shown in FIG. FIG. 8 is a view for explaining a fifth step of “a method for producing an unfired conductor layer printed sheet” based on the “device for producing an unfired conductor layer printed sheet” shown in FIG. FIG. 9 is a view for explaining a sixth step of “a method for producing an unfired conductor layer printed sheet” based on the “device for producing an unfired conductor layer printed sheet” shown in FIG. FIG. 10 is a view for explaining a seventh step of “a method for producing an unfired conductor layer printed sheet” by the “device for producing an unfired conductor layer printed sheet” shown in FIG. FIG. 11A shows the positional relationship between the flat intaglio and the green sheet in the sixth step, and FIG. 11B shows the arrangement of the second unfired conductor layer group printed on the green sheet in the seventh step. FIG. FIG. 12 is a surface view of the produced unfired conductor layer printed sheet. 13A is a surface view of the first lamination sheet taken out from the unfired conductor layer printed sheet shown in FIG. 12, and FIG. 13B is a first view taken out from the unfired conductor layer printed sheet shown in FIG. It is a surface view of the sheet | seat for 2 lamination | stacking. FIG. 14 is a view for explaining a “sheet laminating step” using the first laminating sheet and the second laminating sheet shown in FIG. 13 and the subsequent “laminate cutting step”. FIG. 15 is a view showing an unfired chip obtained in the “laminated body cutting step”. FIG. 16 is a diagram for explaining a “chip baking step” following the “laminated body cutting step” and a “terminal creating step” subsequent thereto.

<Making apparatus for unfired conductor layer printed sheet>
First, with reference to FIG. 1 and FIG. 2, an overall configuration of an “unfired conductor layer printed sheet producing apparatus” to which the present invention is applied will be described.

  In FIG. 1, RF is a feeding roll, RT is a winding roll, RG is a guide roll (four in the figure), RB is a backup roll, SR is a rotational power source, HE is a heater for drying (two in the figure) , TE is a movable table, IP is a flat intaglio, and PF is a paste feeder.

  Incidentally, the + X and −X arrows and the + Y and −Y arrows shown in FIGS. 1 and 2 indicate two directions (X direction and Y direction) orthogonal to each other in the horizontal plane, and the + Z and −Z arrows are horizontal planes. Indicates a vertical direction (Z direction) perpendicular to.

  Each of the feeding roll RF, the winding roll RT, each guide roll RG, and the backup roll RB is rotatably supported on an axis (not shown) parallel to the Y direction. Further, power for intermittently rotating the winding roll RT in the counterclockwise direction in FIG. 1 is transmitted from the rotational power source SR to the winding roll RT.

  A belt-like green sheet GS is wound around the feeding roll RF. This belt-like green sheet GS was prepared in advance using a coating machine such as a die coater or a doctor blade as a main component of a material powder such as a dielectric ceramic material powder, an insulator ceramic material powder or a magnetic material powder, and a binder. The slurry is prepared by coating a surface of a belt-shaped film made of a plastic such as polyethylene phthalate with a predetermined thickness and drying, but the strip-shaped film is not shown in the drawing.

  The belt-shaped green sheet GS wound around the supply roll RF reaches the take-up roll RT from the supply roll RF via the two guide rolls RG, the backup roll RB, and the two guide rolls RG in order. The belt-like film side of the belt-like green sheet GS is in contact with the outer peripheral surfaces of the backup roll RB and the two guide rolls RG downstream thereof.

  That is, when the winding roll RT rotates intermittently in the counterclockwise direction in FIG. 1, the belt-like green sheet GS is intermittently pulled out from the feeding roll RF with the intermittent rotation, and the belt-like green sheet GS. Runs intermittently along the outer peripheral surface of each guide roll RG and backup roll RB, and the unfired conductor layer printed sheet PS (see FIG. 12) after creation is taken up by the take-up roll RT.

  Each drying heater HE includes a first unfired conductor layer group PP1 (see FIG. 6B) and a second unfired conductor layer group PP2 (see FIG. 11B) printed on the belt-like green sheet GS. The belt-like green sheet GS plays a role of heating and drying in the process of running intermittently.

  The movable table TE is disposed below the backup roll RB. The movable table TE has linear power sources (not shown) corresponding to the X direction, the Y direction, and the Z direction, respectively, and can individually move in the X direction, the Y direction, and the Z direction.

  The flat intaglio IP is detachably fixed on the movable table TE. On the non-fixed side plane of this flat intaglio IP, printing of the first unfired conductor layer group PP1 (see FIG. 6B) and second unfired conductor layer group PP2 (see FIG. 11B) ), A total of 20 recesses shared by printing are formed in a predetermined arrangement. This flat intaglio IP is created by processing each concave portion on the plane of the flat base material by a technique such as cutting or etching.

  As can be seen from FIG. 2, the total of 20 recesses formed in the plane of the plate-like intaglio IP has a total of 12 first recesses CP1 having a quadrangular outline and 4 smaller contours than the first recess CP1. It consists of a total of eight second recesses CP2 forming a square shape. Each first recess CP1 has a predetermined X-direction dimension Lcp1, a predetermined Y-direction dimension Wcp1, and a predetermined depth Dip1 (not shown). Each second recess CP2 has an X-direction dimension Lcp2 corresponding to 1 / 2Lcp1, a Y-direction dimension Wcp2 that is the same as Wcp1, and a depth Dip2 (not shown) that is the same as Dip1.

  The total of 20 recesses are (1) a total of four first recess columns CPL1 in which the second recesses CP2, the first recesses CP1, and the second recesses CP2 are linearly arranged in the X direction with a predetermined interval CLx; (2) A total of four second recess rows CPL2 in which two first recesses CP1 are linearly arranged at the same interval CLx in the X direction are alternately and parallel at a predetermined interval CLy in the Y direction. Have an array of Further, the X-direction center of the two gaps CLx in each first recess column CPL1 and the X-direction center of each first recess CP1 in each second recess column CPL2 coincide with each other in the Y direction.

  The distance between the X-direction center of the two intervals CLx and the X-direction center of the first recess CP1 in each first recess column CPL1, and the X-direction center and the interval CLx of the two first recesses CP1 in each second recess column CPL2 The distance from the center in the X direction substantially coincides with the dimension Lcc in the X direction of the unfired chip Cub (see FIG. 15). In addition, the distance between the centers in the Y direction of the two gaps CLy adjacent in the Y direction is substantially the same as the Y direction dimension Wcc of the unfired chip Cub (see FIG. 15).

  Further, as can be seen from FIGS. 6A and 11A, the belt-like green sheet GS has a total of eight recess rows (four first recess rows CPL1 and 4) formed on the plane of the flat intaglio plate IP. Of the two second recess rows CPL2), it has a dimension in the Y direction facing seven recess rows.

  The paste feeder PF fills the recesses except for some of the total 20 recesses formed on the plane of the plate-like intaglio IP with the previously prepared conductor paste in accordance with the movement of the movable table TE in the X direction. Is responsible. The paste feeder PF includes, for example, a dispenser that discharges the conductive paste onto the concave surface of the flat intaglio IP, and a squeegee that scrapes off the excessive conductive paste from the concave surface of the flat intaglio IP.

<Making method of unfired conductor layer printed sheet>
Next, referring to FIG. 1 and FIGS. 3 to 12, a “method for producing an unfired conductor layer printed sheet” based on the “unfired conductor layer printed sheet producing apparatus” will be described.

  Before the creation method is executed, the movable table TE is stopped at the first initial position shown in FIG. In the first initial position, the Z-direction position of the recess forming plane of the plate-like intaglio IP is set to a position where the paste can be supplied by the paste supply machine PF. In the first initial position, as shown in FIG. 6A, a total of eight recess rows (four first recess rows CPL1 and four second recesses) formed on the plane of the flat intaglio IP. Among the recess rows CPL2), seven recess rows (four first recess rows CPL1 and three second recess rows CPL2) excluding the second recess row CPL2 in one part in the Y direction (the lowest position in the figure) are belt-shaped. Opposite the green sheet GS.

<First step of creation method>
As shown in FIG. 3, the movable table TE is moved by a predetermined distance in the −X direction from the first initial position (see the solid line in the figure), and after the movement, the movable table TE is moved by the same distance in the + X direction. 1 Return to the initial position. Further, when the movable table TE moves in the ± X direction, the paste feeding machine PF applies the respective concave portions of the seven concave rows (four first concave rows CPL1 and three second concave rows CPL2) of the flat intaglio IP. Fill with conductor paste.

  As the paste supply machine PF, for example, a device provided with a dispenser that discharges the conductive paste onto the concave surface of the flat intaglio IP and a squeegee that scrapes off the excessive conductive paste from the concave surface of the flat intaglio IP is used. In this case, the conductive paste is discharged from the dispenser to the concave surface of the flat intaglio IP in the process of moving the movable table TE in the -X direction, and the flat intaglio IP by the squeegee in the process of moving the movable table TE in the + X direction. Excess conductor paste is scraped off from the recess forming plane of the first, and the desired filling is performed.

<Second step of creation method>
Subsequently, as shown in FIG. 4, the movable table TE is moved in the + Z direction by a predetermined distance, and the right end in the drawing of the recess forming plane of the plate-like intaglio IP is placed on the outer peripheral surface of the backup roll RB of the belt-like green sheet GS. Contact existing area.

<Third step of creation method>
Subsequently, as shown in FIG. 5, a portion of the belt-like green sheet GS existing on the outer peripheral surface of the backup roll RB is moved a predetermined distance in the + X direction, and at the same time, the movable table TE is moved in the + X direction by the same distance at the same moving speed. .

  As a result, the contact area between the recess forming plane of the plate-like intaglio IP and the portion existing on the outer peripheral surface of the backup roll RB of the belt-like green sheet GS changes relatively in the -X direction. The conductor paste filled in the concave portions of the seven concave rows of IP (four first concave rows CPL1 and three second concave rows CPL2) is directly transferred to the surface of the belt-like green sheet GS, and is shown in FIG. The first unfired conductor layer group PP1 shown is printed.

  As can be seen from FIG. 6B, the first unfired conductor layer group PP1 includes a total of 10 first unfired conductor layers (conductor paste layers) CS1 and a total of 8 second unfired conductor layers (conductors). The paste layer CS2 is composed of a total of 18 unfired conductor layers, and the seven indentation rows (four first indentation rows CPL1 and three second indentation rows CPL2) of the flat intaglio IP are arranged. It corresponds to the arrangement of a total of 18 recesses.

  Further, the X-direction dimension, the Y-direction dimension, and the thickness of each first unfired conductor layer CS1 of the first unfired conductor layer group PP1 are the X-direction dimension Lcp1 and the Y-direction dimension of the first recess CP1 of the plate-like intaglio IP. Wcp1 and the depth Dip1 substantially coincide with each other, and the X-direction dimension, the Y-direction dimension, and the thickness of each second unfired conductor layer CS2 are the same as the X-direction dimensions Lcp2 and Y of the second recess CP2 of the flat intaglio plate IP. The direction dimension Wcp2 and the depth Dip2 substantially coincide with each other.

  Incidentally, the travel distance in the + X direction of the band-shaped green sheet GS in the third step (= the travel distance in the + X direction of the movable table TE) is equal to the second unfired conductor layer group PP1 and the second unexposed adjacent to the unfired conductor layer group PP1 in the −X direction. It is set to such a value that a predetermined distance SPx (see FIG. 12) can be secured between the fired conductor layer group PP2.

<Fourth step of creation method>
Subsequently, as shown in FIG. 7, the movable table TE is moved by a predetermined distance in the −Z direction, moved and moved by a predetermined distance in the −X direction to return to the first initial position, and after the return, the predetermined distance in the + Y direction. As (see FIG. 11A) is moved and displaced to the second initial position.

  In the second initial position, the Z-direction position of the recess forming plane of the plate-like intaglio IP is set to a position where the paste can be supplied by the paste supply machine PF. Further, in the second initial position, as shown in FIG. 11A, a total of eight recess rows (four first recess rows CPL1 and four second recesses) formed on the plane of the flat intaglio IP. Among the recess rows CPL2), seven recess rows (three first recess rows CPL1 and four second recess rows CPL2) excluding the first recess row CPL1 in the other part in the Y direction (the top in the figure) are belt-shaped. Opposite the green sheet GS.

  In other words, in order to change the row of recesses facing the belt-like green sheet GS, the movable table TE that has returned to the first initial position is moved by the predetermined distance As (see FIG. 11A) in the + Y direction to obtain the second initial stage. Displace to position. Incidentally, this distance As substantially coincides with the dimension Wcc of the unfired chip Cub in the Y direction (see FIG. 15).

<Fifth step of creation method>
Subsequently, as shown in FIG. 8, the movable table TE is moved a predetermined distance in the −X direction from the second initial position (see the solid line in the figure), and after the movement, the movable table TE is moved in the + X direction by the same distance. To return to the second initial position. Further, when the movable table TE moves in the ± X direction, the paste feeding machine PF applies the respective concave portions of the seven concave rows (three first concave rows CPL1 and four second concave rows CPL2) of the flat intaglio IP. Fill with conductor paste.

  As the paste supply machine PF, for example, a device provided with a dispenser that discharges the conductive paste onto the concave surface of the flat intaglio IP and a squeegee that scrapes off the excessive conductive paste from the concave surface of the flat intaglio IP is used. In this case, the conductive paste is discharged from the dispenser to the concave surface of the flat intaglio IP in the process of moving the movable table TE in the -X direction, and the flat intaglio IP by the squeegee in the process of moving the movable table TE in the + X direction. Excess conductor paste is scraped off from the recess forming plane of the first, and the desired filling is performed.

<6th step of creation method>
Subsequently, as shown in FIG. 9, the movable table TE is moved in the + Z direction by a predetermined distance, and the right end in the drawing of the recess forming plane of the plate-like intaglio IP is placed on the outer peripheral surface of the backup roll RB of the belt-like green sheet GS. Contact existing area.

<Seventh step of creation method>
Subsequently, as shown in FIG. 10, the portion of the belt-like green sheet GS existing on the outer peripheral surface of the backup roll RB travels a predetermined distance in the + X direction and simultaneously moves the movable table TE in the + X direction at the same moving speed. .

  As a result, the contact area between the recess forming plane of the plate-like intaglio IP and the portion existing on the outer peripheral surface of the backup roll RB of the belt-like green sheet GS changes relatively in the -X direction. The conductor paste filled in the concave portions of the seven concave rows of IP (three first concave rows CPL1 and four second concave rows CPL2) is directly transferred to the surface of the belt-like green sheet GS and is shown in FIG. The second unfired conductor layer group PP2 shown is printed.

  As can be seen from FIG. 11B, the second unfired conductor layer group PP2 includes a total of 11 first unfired conductor layers (conductor paste layers) CS1 and a total of 6 second unfired conductor layers (conductors). Paste layer) CS2 and a total of 17 unfired conductor layers are arranged in seven concave rows (three first concave rows CPL1 and four second concave rows CPL2) of the flat intaglio IP. It matches the arrangement of the recesses that make up. That is, the arrangement of the second unfired conductor layer group PP2 is different from the arrangement of the first unfired conductor layer group PP1.

  Further, the X-direction dimension, the Y-direction dimension, and the thickness of each first unfired conductor layer CS1 of the second unfired conductor layer group PP2 are the X-direction dimension Lcp1 and the Y-direction dimension of the first recess CP1 of the plate-like intaglio IP. Wcp1 and the depth Dip1 substantially coincide with each other, and the X-direction dimension, the Y-direction dimension, and the thickness of each second unfired conductor layer CS2 are the same as the X-direction dimensions Lcp2 and Y of the second recess CP2 of the flat intaglio plate IP. The direction dimension Wcp2 and the depth Dip2 substantially coincide with each other.

  Incidentally, the travel distance in the + X direction of the belt-shaped green sheet GS in the seventh step (= the travel distance in the + X direction of the movable table TE) is equal to the first unfired conductor layer group PP2 and the first non-fired conductor layer group PP2 adjacent in the −X direction. The value is set such that a predetermined distance SPx (see FIG. 12) can be secured between the fired conductor layer group PP1.

<Eighth step of creation method>
Subsequently, the movable table TE is moved by a predetermined distance As (see FIG. 11A) in the −Y direction, moved a predetermined distance in the −Z direction after the movement, and moved by a predetermined distance in the −X direction after the movement. Return to the initial position (see FIG. 1). Of course, the movable table TE is moved a predetermined distance in the −Z direction, moved a predetermined distance in the −X direction after the movement, and then moved a predetermined distance As (see FIG. 11A) in the −Y direction after the movement. You may make it return to a position.

  Thereafter, the first step to the third step and the fourth step to the eighth step are alternately performed repeatedly, and the first unfired conductor layer group PP1 (FIG. 6B) on the belt-like green sheet GS. And the second unfired conductor layer group PP2 (see FIG. 11B) are alternately performed, and the first unfired conductor layer group PP1 (see FIG. B)) and the second unfired conductor layer group PP2 (see FIG. 11B) are heated and dried by the respective drying heaters HE while the strip-shaped green sheet GS travels intermittently. And the unbaked conductor layer printing sheet PS (refer FIG. 12) after preparation is wound up by the winding roll RT.

<Example of manufacturing method of multilayer electronic component>
Next, a method example for manufacturing a multilayer electronic component, for example, a multilayer ceramic capacitor, using the unfired conductor layer printed sheet PS shown in FIG. 12 will be described with reference to FIGS.

  At the time of manufacture, a first laminate sheet PS1 (see FIG. 13A) on which a predetermined array of first unfired conductor layer group PP1 is printed from unfired conductor layer printed sheet PS, and first unfired conductor A second lamination sheet PS2 (see FIG. 13B) on which the second unsintered conductor layer group PP2 having an arrangement different from that of the layer group PP1 is printed is taken out by a technique such as punching or cutting.

  As described above, in the unfired conductor layer printed sheet PS, differently arranged first unfired conductor layer groups PP1 and second unfired conductor layer groups PP2 are alternately formed along the sheet length direction. Therefore, the first laminate sheet PS1 and the second unfired conductor layer group PP2 of the same size can be easily obtained simply by punching or cutting the unfired conductor layer printed sheet PS in the + X direction. it can.

  Subsequently, a predetermined number of first stacking sheets PS1 and second stacking sheets PS2 are alternately stacked, and a predetermined number of third stacking sheets (not shown) are stacked on the top and bottom, and the layers are thermocompression bonded together. MB (see FIG. 14) is obtained. The third lamination sheet is a green sheet having the same size as the green sheets constituting the first lamination sheet PS1 and the second lamination sheet PS2, and no unfired conductor layer is printed thereon.

  Subsequently, a cutting line DLx in the X direction (see FIG. 14) and a cutting line DLy in the Y direction are set on the stacked body MB, and the stacked body MB is cut at each cutting line DLx and DLy by a cutting machine such as a dicing machine. By cutting, an unsintered chip Cub (see FIG. 15) having a size corresponding to the part is obtained. In this cutting, the center in the X direction of each first unfired conductor layer CS1 inherent in the multilayer body MB is cut in the Y direction, and one end edge in the X direction of each second unfired conductor layer CS2 is cut in the Y direction. For this reason, the edges of the plurality of unfired conductor layers present in the unfired chip Cub are alternately exposed in the stacking direction on both end faces of the unfired chip Cub in the X direction.

  Subsequently, the unfired chip Cub is put into a firing furnace to obtain a fired chip Cba (see FIG. 16) in which the unfired conductor layer and the like are sintered. Subsequently, a terminal paste prepared in advance by a technique such as a dipping method is applied to both ends in the X direction of the fired chip Cba, and this is sintered by a baking process to create a terminal EE (see FIG. 16).

  This completes the production of the multilayer ceramic capacitor, but depending on the material, etc., it is possible to simultaneously sinter the non-fired chip Cub and the terminal paste, and electroplating the surface of the terminal EE as necessary. One or more metal layers are formed by such a method.

<Effects obtained by creation apparatus and creation method>
Next, effects obtained by the above-mentioned “unfired conductor layer printed sheet producing apparatus” and “unfired conductor layer printed sheet producing method” will be described.

  (E1) By changing the Y-direction position of the plate-like intaglio plate IP in which a total of 20 recesses (a total of 12 first recesses CP1 and a total of 8 second recesses CP2) are formed in a predetermined arrangement, the first A recessed area corresponding to printing of the unfired conductor layer group PP1 and a recessed area corresponding to printing of the second unfired conductor layer group PP2 can be selected. That is, using a single flat intaglio IP, the first green conductor layer group PP1 and the second green conductor layer group PP2 that are differently arranged on the surface of the belt-like green sheet GS are alternately arranged along the sheet length direction. Can be printed.

  (E2) Since each recessed part is formed in the plane of flat plate-shaped intaglio IP, it can ensure a high dimensional accuracy in each recessed part compared with the conventional cylindrical intaglio. That is, in the case of the flat plate intaglio IP, each concave portion is processed by a technique such as cutting or etching on the flat surface of the flat plate base material. However, since the processing target is a flat surface, It is easy to finish the contour and depth of the recesses with high accuracy. That is, since it is easy to ensure high dimensional accuracy in each recess, the conductor paste filled in each recess can be easily removed and transferred to the surface of the belt-like green sheet GS. As a result, the first unfired It becomes easy to ensure high dimensional accuracy in the contours and thicknesses of the respective unfired conductor layers constituting the conductor layer group PP1 and the second unfired conductor layer group PP2.

  (E3) In the flat intaglio IP, the intended printing is performed by directly transferring the conductive paste filled in the flat concave portion to the surface of the belt-like green sheet, but the concave portion is formed in the flat surface. Therefore, combined with the fact that it is easy to ensure high dimensional accuracy in the recesses, it is difficult to cause a transfer failure such as paste remaining during the transfer, and as a result, the first unfired conductor layer group PP1 and the second unfired It becomes easy to ensure high dimensional accuracy in the contour and thickness of each unfired conductor layer constituting each conductor layer group PP2.

<Modification of Creation Device and Creation Method>
Next, modifications of the “unfired conductor layer printed sheet producing apparatus” and “unfired conductor layer printed sheet producing method” will be described.

  (M1) The plate-shaped intaglio IP has a total of 20 recesses formed in a predetermined arrangement on a plane (see FIG. 2). The first recess CP1 and the second recess CP2 constituting the first recess row CPL1 are shown. And the number of first recesses CP1 constituting the second recess column CPL2 may be increased in the same X direction, and the first recess column CPL1 and the second recess The number of columns CPL2 may be increased in the same Y direction.

  (M2) An example of the unfired conductor layer printed sheet PS in which the first unfired conductor layer group PP1 and the second unfired conductor layer group PP2 shown in FIG. The first unsintered conductor layer group and the second unsintered conductor layer group PP1 and the second unsintered conductor layer group PP2 and the second unsintered conductor layer group PP2 and the second unsintered conductor layer group PP1 and the second unsintered conductor layer group PP2 by changing the array of the recesses formed on the surface of the flat intaglio IP. The unfired conductor layer group can be printed on the surface of the belt-like green sheet GS. In addition, if the contour of the recess formed on the surface of the flat intaglio IP is changed, an unfired conductor layer printed sheet used for the manufacture of multilayer electronic components other than multilayer ceramic capacitors, such as multilayer inductors, is created. You can also

  RF ... feeding roll, RT ... winding roll, RG ... guide roll, RB ... backup roll, SR ... rotary power source, GS ... strip green sheet, TE ... movable table, IP ... flat plate intaglio, CP1 ... first recess, CP2 ... second recess, CPL1 ... first recess row, CPL2 ... second recess row, PF ... paste feeder, PP1 ... first unfired conductor layer group, PP2 ... second unfired conductor layer group, CS1 ... first Unsintered conductor layer, CS2 ... second unsintered conductor layer.

Claims (4)

Non-fired conductor layer printed sheet for multilayer electronic components, wherein first and second unfired conductor layer groups and second unfired conductor layer groups having different arrangements are alternately printed on the surface of the belt-like green sheet along the sheet length direction In the creation method of
A plurality of recesses are formed in a predetermined arrangement on a plane, and a plate-like intaglio that is movable in a direction perpendicular to the sheet length direction of the belt-like green sheet is used. (1) The plate-like intaglio is orthogonal to the sheet length direction. The concave portion excluding one portion in the direction perpendicular to the sheet length direction among the plurality of concave portions can be used for printing, and the conductive paste filled in the concave portion is applied to the surface of the belt-like green sheet. Direct transfer to print the first unfired conductor layer group; and (2) perpendicular to the sheet length direction among the plurality of recesses by moving the flat intaglio in a direction perpendicular to the sheet length direction. The recesses except for the other part in the direction to be printed can be used for printing, and the conductor paste filled in the recesses is directly transferred to the surface of the belt-like green sheet to print the second unfired conductor layer group That the steps are repeated alternately,
A method for producing an unfired conductor layer printed sheet for a multilayer electronic component. The plate-like intaglio can be moved in the sheet length direction of the belt-like green sheet, and the printing of the first unfired conductor layer group in the step (1) and the printing of the second unfired conductor layer group in the step (2) Each is performed while moving the strip-shaped green sheet in the sheet length direction and simultaneously moving the plate-shaped intaglio in the sheet length direction of the strip-shaped green sheet.
The method for producing an unfired conductor layer printed sheet for a multilayer electronic component according to claim 1. Non-fired conductor layer printed sheet for multilayer electronic components, wherein first and second unfired conductor layer groups and second unfired conductor layer groups having different arrangements are alternately printed on the surface of the belt-like green sheet along the sheet length direction In the creation device,
(1) a plate-like intaglio plate having a plurality of recesses formed in a predetermined arrangement on a plane and directly transferring the conductive paste filled in the recesses to the surface of the belt-like green sheet; A power source for moving the sheet in a direction orthogonal to the sheet length direction, and (3) a paste feeder for filling a plurality of concave portions of the flat intaglio with a conductive paste,
An apparatus for producing an unfired conductor layer printed sheet for a laminated electronic component. (4) a second power source for moving the belt-shaped green sheet in the sheet length direction; and (5) a third power source for moving the flat plate-shaped intaglio in the sheet length direction of the belt-shaped green sheet. And more,
The apparatus for producing an unfired conductor layer printed sheet for a multilayer electronic component according to claim 3.

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