CN114789597A - Screen printing plate and screen printing method - Google Patents

Screen printing plate and screen printing method Download PDF

Info

Publication number
CN114789597A
CN114789597A CN202210073168.XA CN202210073168A CN114789597A CN 114789597 A CN114789597 A CN 114789597A CN 202210073168 A CN202210073168 A CN 202210073168A CN 114789597 A CN114789597 A CN 114789597A
Authority
CN
China
Prior art keywords
screen
inner frame
screen printing
printing plate
internal electrode
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210073168.XA
Other languages
Chinese (zh)
Inventor
幸川进一
平野博之
池田充
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Murata Manufacturing Co Ltd
Original Assignee
Murata Manufacturing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Murata Manufacturing Co Ltd filed Critical Murata Manufacturing Co Ltd
Publication of CN114789597A publication Critical patent/CN114789597A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G4/00—Fixed capacitors; Processes of their manufacture
    • H01G4/002—Details
    • H01G4/018—Dielectrics
    • H01G4/06—Solid dielectrics
    • H01G4/08—Inorganic dielectrics
    • H01G4/12—Ceramic dielectrics
    • H01G4/1209—Ceramic dielectrics characterised by the ceramic dielectric material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F15/00—Screen printers
    • B41F15/14—Details
    • B41F15/34—Screens, Frames; Holders therefor
    • B41F15/36—Screens, Frames; Holders therefor flat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme
    • B41M1/12—Stencil printing; Silk-screen printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme
    • B41M1/26—Printing on other surfaces than ordinary paper
    • B41M1/34—Printing on other surfaces than ordinary paper on glass or ceramic surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N1/00—Printing plates or foils; Materials therefor
    • B41N1/24—Stencils; Stencil materials; Carriers therefor
    • B41N1/247—Meshes, gauzes, woven or similar screen materials; Preparation thereof, e.g. by plasma treatment
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G4/00—Fixed capacitors; Processes of their manufacture
    • H01G4/002—Details
    • H01G4/005—Electrodes
    • H01G4/012—Form of non-self-supporting electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G4/00—Fixed capacitors; Processes of their manufacture
    • H01G4/30—Stacked capacitors
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/10—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern
    • H05K3/12—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern using thick film techniques, e.g. printing techniques to apply the conductive material or similar techniques for applying conductive paste or ink patterns
    • H05K3/1216—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern using thick film techniques, e.g. printing techniques to apply the conductive material or similar techniques for applying conductive paste or ink patterns by screen printing or stencil printing
    • H05K3/1225—Screens or stencils; Holders therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/13—Energy storage using capacitors

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Ceramic Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Textile Engineering (AREA)
  • Plasma & Fusion (AREA)
  • Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
  • Screen Printers (AREA)
  • Printing Methods (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Manufacturing Of Printed Wiring (AREA)

Abstract

Provided are a screen printing plate and a screen printing method capable of forming a printed pattern with high accuracy. The screen printing plate (30) includes: a rectangular inner frame (31); a screen (61) having a printing pattern (65) formed with an opening (64) and being opened to the inside of the inner frame (31) in a state in which tension is applied thereto; an outer frame (41) which is disposed outside the inner frame (31) in a state of surrounding the inner frame (31); a connecting member (51) that connects the inner frame (31) and the outer frame (41); and bolts (71) for adjusting the tension of the screen (61) by applying stress to the inner frame (31) to move the inner frame (31) away from and toward the outer frame (41).

Description

Screen printing plate and screen printing method
Technical Field
The present invention relates to a screen printing plate and a screen printing method.
Background
Conventionally, there has been known a laminated ceramic electronic component such as a laminated ceramic capacitor including a laminate in which dielectric ceramic layers and internal electrode layers are multilayered. Such an electronic component is thinned by forming dielectric ceramic layers and internal electrode layers by printing.
For example, patent document 1 discloses the following technique: a dielectric paste containing a dielectric material is applied to the surface of a support sheet by a gravure coating method to form a spacer layer having a plurality of recesses formed in a pattern complementary to the pattern of the internal electrode layers, the internal electrode layers are formed by printing the electrode paste in the plurality of recesses of the spacer layer, and a ceramic green sheet containing the dielectric material is formed on the internal electrode layers and the spacer layer.
Documents of the prior art
Patent document
Patent document 1: japanese laid-open patent publication No. 2004-304000
Disclosure of Invention
Problems to be solved by the invention
As described in patent document 1, the ceramic green sheet applied to the support sheet expands and contracts together with the support sheet due to thermal and mechanical factors. As a result, the position of the pattern of the internal electrode layer printed on the ceramic green sheet also fluctuates, and it is sometimes difficult to form the pattern of the internal electrode layer with high accuracy.
The invention aims to provide a screen printing plate and a screen printing method which can form a printed pattern with high precision.
Means for solving the problems
The screen printing plate of the present invention comprises: a rectangular inner frame; a screen having a printing pattern formed with an opening, the screen being opened to an inner side of the inner frame in a state of being applied with tension; an outer frame disposed outside the inner frame so as to surround the inner frame; a connecting member that connects the inner frame and the outer frame; and an adjusting member for adjusting the tension of the screen by applying stress to the inner frame to move the inner frame away from and toward the outer frame.
ADVANTAGEOUS EFFECTS OF INVENTION
According to the present invention, it is possible to provide a screen printing plate and a screen printing method capable of forming a printed pattern with high accuracy.
Drawings
Fig. 1 is a schematic perspective view of a multilayer ceramic capacitor having internal electrode layers formed by a screen printing plate according to an embodiment.
Fig. 2 is a sectional view II-II of fig. 1.
FIG. 3 is a plan view showing the 1 st material sheet having an internal electrode layer pattern formed on a ceramic green sheet.
FIG. 4 is a plan view showing a 2 nd material sheet obtained by forming a 3 rd dielectric ceramic layer on the 1 st material sheet in FIG. 3 by printing.
Fig. 5 is an enlarged view of a portion V of fig. 4, showing a dividing line of the ceramic green sheet.
Fig. 6 is a top view of the screen printing plate of the embodiment.
Fig. 7 is a side view schematically showing a state where an internal electrode layer pattern is printed on a ceramic green sheet by using the screen printing plate of the embodiment.
Fig. 8 is a partially enlarged plan view of an inner frame constituting the screen printing plate according to the embodiment.
Fig. 9 is a diagram for explaining an example of the action of correcting the position of the internal electrode layer pattern by the screen printing plate of the embodiment.
Fig. 10 is a diagram illustrating another example of the effect of correcting the position of the internal electrode layer pattern by the screen printing plate of the embodiment.
Fig. 11 is a diagram for explaining an example of a method for grasping the tendency of the internal electrode layers to be deformed, and shows a state where the internal electrode layers are formed on the ceramic green sheet in a pseudo manner.
FIG. 12 is a sectional view showing a part of a screen printing plate in which the 3 rd dielectric ceramic layer is formed between internal electrode layers.
FIG. 13 is a view for explaining an example of the effect of correcting the positions of the internal electrode layer pattern and the 3 rd dielectric ceramic layer by the screen printing plate of the embodiment.
Description of the reference numerals
21. Ceramic green sheets (dielectric sheets, printed matter); 30. 80, screen printing plate; 31. an inner frame; 32. an edge portion; 33. a corner portion; 41. an outer frame; 51. a connecting member; 61. a wire mesh; 62. a grid; 64. 84, an opening; 65. printing a pattern; 71. a bolt (adjustment member, screw member); 87. a thick-walled portion; p, conductive paste (printing material).
Detailed Description
Hereinafter, embodiments will be described with reference to the drawings.
Fig. 1 shows a multilayer ceramic capacitor 10 including a multilayer body 12 in which dielectric ceramic layers and internal electrode layers are alternately multilayered. The internal electrode layers were formed on the dielectric ceramic layers by screen printing using the screen printing plate of the embodiment.
In the following, before the description of the screen printing plate of the embodiment, the laminated ceramic capacitor 10 is described in order to describe the dielectric ceramic layers and the internal electrode layers.
Fig. 1 is a schematic perspective view of a multilayer ceramic capacitor 10. Fig. 2 is a sectional view taken along line II-II of fig. 1.
As shown in fig. 1, the multilayer ceramic capacitor 10 is an electronic component having a substantially rectangular parallelepiped shape as a whole, and includes a main body 11 and a pair of external electrodes 16.
In fig. 1 and 2, arrow T indicates the thickness direction of the multilayer ceramic capacitor 10 and the body portion 11, and arrow L indicates the longitudinal direction of the multilayer ceramic capacitor 10 and the body portion 11, which is orthogonal to the thickness direction T. In fig. 1, an arrow W indicates a width direction orthogonal to the thickness direction T and the longitudinal direction L of the multilayer ceramic capacitor 10 and the body portion 11.
As shown in fig. 1 and 2, the pair of external electrodes 16 are provided so as to be spaced apart from each other so as to cover the outer surfaces of both ends of the main body portion 11 in the longitudinal direction L. The pair of external electrodes 16 are each formed of a conductive film.
The pair of external electrodes 16 is formed of, for example, a laminated film of a sintered metal layer and a plating layer. The sintered metal layer is formed by sintering a paste of, for example, Cu, Ni, Ag, Pd, Ag — Pd alloy, Au, or the like. The plating layer is composed of, for example, an Ni plating layer and an Sn plating layer covering the Ni plating layer. Alternatively, the plating layer may be a Cu plating layer or an Au plating layer. The pair of external electrodes 16 may be formed only by plating. Further, a conductive resin paste may be used as the pair of external electrodes 16.
As shown in fig. 2, the main body 11 includes a laminate 12 composed of dielectric ceramic layers 13 and internal electrode layers 14 alternately laminated along the thickness direction T.
The dielectric ceramic layer 13 is formed of a ceramic material containing barium titanate as a main component, for example. The dielectric ceramic layer 13 may be another ceramic material with a high dielectric constant (for example, CaTiO) 3 、SrTiO 3 、CaZrO 3 Etc. as a main component).
The internal electrode layers 14 are formed of a metal material typified by Ni, Cu, Ag, Pd, an Ag — Pd alloy, Au, or the like, for example. The internal electrode layers 14 are not limited to these metal materials, and may be formed of other conductive materials.
As shown in fig. 2, one of the pair of internal electrode layers 14 adjacent to each other with the dielectric ceramic layers 13 interposed therebetween in the thickness direction T is electrically connected to one of the pair of external electrodes 16 inside the laminated ceramic capacitor 10, and the other of the pair of internal electrode layers 14 adjacent to each other with the dielectric ceramic layers 13 interposed therebetween in the thickness direction T is electrically connected to the other of the pair of external electrodes 16 inside the laminated ceramic capacitor 10. Thus, the pair of external electrodes 16 are electrically connected in parallel to each other.
The dielectric ceramic layer 13 has: a plurality of 1 st dielectric ceramic layers 13a sandwiched between the internal electrode layers 14; a pair of 2 nd dielectric ceramic layers 13b disposed at both ends in the thickness direction T and having a thickness larger than that of the 1 st dielectric ceramic layer 13 a; and a plurality of 3 rd dielectric ceramic layers 13c disposed in a region which is located around the internal electrode 14 and in which the internal electrode layer 14 is not disposed, between the 1 st dielectric ceramic layers 13a facing each other with the internal electrode layer 14 interposed therebetween.
The laminate 12 includes an inner layer portion 12A in which the internal electrode layers 14 face each other with the 1 st dielectric ceramic layer 13a interposed therebetween, and a pair of outer layer portions 12B arranged with the inner layer portion 12A interposed therebetween in the lamination direction T.
Fig. 3 shows the 1 st material sheet 20A when the laminate 12 is produced, and fig. 4 shows the 2 nd material sheet 20B when the laminate 12 is produced.
In the 1 st material sheet 20A shown in FIG. 3, an internal electrode layer pattern 22 including a plurality of internal electrode layers 14 is formed by printing on the surface of a ceramic green sheet 21 to be the 1 st dielectric ceramic layer 13a or the 2 nd dielectric ceramic layer 13 b. The ceramic green sheet 21 is a dielectric sheet and is an example of a printed object.
The 2 nd material sheet 20B shown in fig. 4 is further formed with a plurality of 3 rd dielectric ceramic layers 13c around the internal electrodes 14 by printing on the 1 st material sheet 20A shown in fig. 3. FIG. 5 is an enlarged view of a portion V in FIG. 4, and as shown in FIG. 5, the 3 rd dielectric ceramic layer 13c is formed around the entire periphery of the internal electrodes 14. Fig. 3, 4, and 5 show the longitudinal direction L and the width direction W of the multilayer ceramic capacitor 10, respectively.
The laminate 12 is obtained by laminating and cutting a plurality of the 2 nd material sheets 20B shown in fig. 4. As shown in fig. 5, for example, a plurality of continuous two-sized internal electrode layers 14 and a plurality of two-sized 3 rd dielectric ceramic layers 13c located between the internal electrode layers 14 are formed on the surface of the ceramic green sheet 21. As shown in fig. 5, the 2 nd material sheet 20B is divided in the longitudinal direction by dividing along a plurality of 1 st dividing lines W1 and 2 nd dividing lines W2, and divided in the width direction by dividing along a plurality of dividing lines L1, the plurality of 1 st dividing lines W1 and 2 nd dividing lines W2 being along the width direction W, and the plurality of dividing lines L1 being along the length direction L. The 1 st division line W1 is divided into two equal inner electrode layers 14 at the center of the division boundary in the longitudinal direction L. The 2 nd dividing line W2 is divided into two sizes of the 3 rd dielectric ceramic layer 13c at the center of the dividing boundary in the longitudinal direction L. The dividing line L1 divides the center between the internal electrode layers 14 and the 3 rd dielectric ceramic layers 13c arranged along the width direction W. Thus, a 1 st dielectric ceramic layer 13a (or a 2 nd dielectric ceramic layer 13b), an internal electrode layer 14, and a 3 rd dielectric ceramic layer 13c are formed. The plurality of 2 nd material sheets 20B are alternately stacked in the longitudinal direction L so that the 3 rd dielectric ceramic layers 13c are alternately stacked on one end side and the other end side in the longitudinal direction L of the internal electrode layers 14 and the 1 st division line W1 and the 2 nd division line W2 overlap each other.
Next, the screen printing plate 30 of the embodiment will be described with reference to fig. 6 to 8. Using this screen printing plate 30, the 1 st material sheet 20A described above was obtained.
Fig. 6 is a top view of the screen printing plate 30 of the embodiment. Fig. 7 is a side view schematically showing a state where a plurality of internal electrode layers 14 are printed on the surface of the ceramic green sheet 21 by using the screen printing plate 30. Fig. 8 is a partially enlarged view of the screen printing plate 30.
As shown in fig. 6 and 7, the screen printing plate 30 includes a rectangular inner frame 31 and an outer frame 41, a plurality of coupling members 51, a screen 61, and a plurality of bolts 71. The bolt 71 is an example of an adjusting member and a screw member.
The inner frame 31 has 4 sides 32 constituting four sides and corner portions 33 arranged at four corners between each of a pair of adjacent sides 32.
As shown in fig. 8, a pair of adjacent side portions 32 are connected via corner portions 33. The corner 33 is formed in a rounded shape. The side portion 32 has a connecting piece portion 32a at an end portion close to the corner portion 33. The connecting piece portion 32a is joined to the corner portion 33 by the joining member 34, and the side portion 32 is fixed to the corner portion 33. The coupling member 34 is a combination of a bolt and a nut, for example. By coupling or decoupling the coupling member 34, the side portion 32 can be attached to or detached from the corner portion 33.
As described above, the inner frame 31 of the present embodiment is configured by a combination of a plurality of members, i.e., the 4 side portions 32 and the 4 corner portions 33, but the inner frame 31 is not limited to such a configuration, and may be configured by, for example, one rectangular member.
The outer frame 41 is disposed outside the inner frame 31 so as to surround the inner frame 31. The outer frame 41 has 4 frame portions 42 facing the side portions 32 of the inner frame 31.
The plurality of coupling members 51 couple the inner frame 31 and the outer frame 41. The connecting members 51 are disposed at 4 positions between each corner 33 of the inner frame 31 and each corner 41a of the outer frame 41 facing each corner 33. As shown in fig. 8, the end of the connecting member 51 on the inner frame 31 side is joined to the corner 33 by a joining member 52. The coupling member 52 is a combination of, for example, a bolt and a nut, and the coupling member 51 is attachable to and detachable from the corner portion 33 by coupling and detaching the coupling member 52. That is, the outer frame 41 is detachable from the inner frame 31. The end of the connecting member 51 on the side of the outer frame 41 is not detachably fixed to the outer frame 41 or is detachably fixed to the outer frame 41.
Preferably, the inner frame 31 and the outer frame 41 are made of metal. Preferably, the outer frame 41 is formed of, for example, stainless steel, or the like, and has rigidity that is difficult to flex to the outside and the inside. On the other hand, at least the side portions 32 of the inner frame 31 are made of metal having elasticity, such as aluminum, which is capable of being deformed to some extent by bending inward and outward. In this way, it is preferable that the sides 32 of the inner frame 31 have lower rigidity than the outer frame 41. By making the material of the inner frame 31 different from that of the outer frame 41, the rigidity of the inner frame 31 can be made lower than that of the outer frame 41. Further, by making the thickness of the inner frame 31 different from that of the outer frame 41, the rigidity of the inner frame 31 can be made lower than that of the outer frame 41. The different thickness may be a thickness in a direction perpendicular to the screen 61 or a thickness in a direction parallel to the screen 61.
As shown in fig. 6, the screen 61 includes a mesh 62 expanded to the inner side of the inner frame 31 in a state where tension is applied. The mesh 62 has a fine mesh structure. The mesh 62 is made of a metal mesh made of stainless steel or the like, or a resin mesh such as a nylon mesh. The mesh 62 is fixed to at least the lower surface of each side portion 32 of the inner frame 31 by means of bonding or the like. The grid 62 may also be secured to each side 32 and each corner 33.
A printing region 63 is provided in the center of the mesh 62. The printing area 63 includes a printing pattern 65 formed with a plurality of openings 64. The printed pattern 65 includes a mask 66 that plugs the mesh 62 and a plurality of openings 64 where the mask 66 is not formed. The print pattern 65 is formed, for example, by the following method: the grid 62 is coated with a photosensitive emulsion, and subjected to UV exposure and development processes via a photomask or the like.
The print region 63 is a region corresponding to the surface of the ceramic green sheet 21 on which the internal electrode layer pattern 22 is formed. The print pattern 65 corresponds to the internal electrode layer pattern 22, and the conductive paste is printed on the ceramic green sheet 21 through the plurality of openings 64 to form the plurality of internal electrode layers 14.
The plurality of bolts 71 are screwed to the respective frame portions 42 of the outer frame 41 from the outside toward the inside. The axial direction of each bolt 71 intersects the longitudinal direction of the frame 42 in a perpendicular or nearly perpendicular manner. That is, the bolts 71 are attached to the outer frame 41 so as to be able to advance and retreat with respect to the inner frame 31. Each frame 42 has a screw hole 42a to which the bolt 71 is screwed. In the present embodiment, 3 bolts 71 are disposed at equal intervals along the longitudinal direction of the frame 42 in one frame 42, but the number of bolts 71 per frame 42 is arbitrary and is not limited.
The bolt 71 is fitted to the side portion 32 of the inner frame 31 so as to be rotatable about the axis and immovable in the axial direction. As shown in fig. 7, the bolt 71 has a coaxial flange 71a at its tip, and the flange 71a is rotatably received inside the side portion 32. When the bolt 71 screwed into the screw hole 42a of the frame 42 is rotated, the flange 71a engages with the inside of the side portion 32, and the side portion 32 deforms in accordance with the advance and retreat of the bolt 71. That is, when the bolt 71 is rotated in the fastening direction and is moved inward, the side portion 32 is pressed inward and deformed so as to be deflected toward the screen 61. When the bolt 71 is rotated in the loosening direction and retracted outward, the side portion 32 is deformed so as to be flexed outward. Thus, bolts 71 stress the hem 32 of inner frame 31 to move the hem 32 away from or toward the outer frame 41. Thereby, the tension of the wire mesh 61 that opens inside the inner frame 31 is adjusted in accordance with the displacement of the side portion 32.
In order to print the internal electrode layer pattern 22 on the ceramic green sheet 21 as shown in fig. 3 by using the screen printing plate 30 having the above-described structure, as shown in fig. 7, a screen 61 is disposed above the ceramic green sheet 21 placed on the stage 25. The ceramic green sheet 21 is supported by a support sheet 26 made of a resin sheet such as PET (polyethylene terephthalate). The ceramic green sheet 21 is formed on the surface of the support sheet 26 by, for example, doctor blading, screen printing, or the like.
As shown in fig. 7, the screen 61 of the screen printing plate 30 is arranged in parallel with the ceramic green sheet 21 at a predetermined distance. The conductive paste P as a printing material supplied to the upper surface of the screen 61 is pressed against the printing area 63 by the squeegee 27 so as to be moved closer to the arrow F direction. Thus, when the screen 61 is pressed against the ceramic green sheet 21 by the squeegee 27, the conductive paste P passing through the openings 64 is printed on the ceramic green sheet 21, and the internal electrode layer pattern 22 including a plurality of internal electrode layers is formed.
Before the screen printing of the internal electrode layer pattern 22 by the screen printing plate 30 in this way, the tension of the screen 61 is adjusted using the plurality of bolts 71. By adjusting the tension of the screen 61, it is possible to suppress the internal electrode layer pattern 22 from being deformed with a slight expansion and contraction of the support sheet 26 after printing.
The tension adjustment of the screen 61 is performed as follows. The internal electrode layer patterns 22 were printed on the ceramic green sheet 21 without adjusting the tension, and the tendency of the internal electrode layer patterns 22 to be deformed by the deformation of the support sheet 26 after printing was grasped in advance. Then, after adjusting the tension of the screen 61 by the bolts 71 via the inner frame 31 to correct the grasped tendency of the deformation, screen printing is performed as shown in fig. 7.
Fig. 9 and 10 show examples of tension adjustment.
The left side of fig. 9 shows a state in which the support sheet 26 is deformed after printing, and the entire internal electrode layer pattern 22 printed on the ceramic green sheet 21 is deformed into a mountain shape protruding upward in the drawing. In this case, as shown in the right-hand diagram of fig. 9, the inner frame 31 is deformed by adjusting the amount of advance and retreat of the plurality of bolts 71 at the corresponding portions so that the upper center portion of the screen 61 is pressed downward in the figure and both lower side portions of the screen 61 are pressed upward in the figure.
The arrows in the right-hand diagrams of fig. 9 and 10 indicate the strength when the inner frame 31 is pressed, and the longer the strength, the stronger the strength.
When the support sheet 26 is deformed after printing, the position of the internal electrode layer 14 is displaced in accordance with the deformation of the support sheet, as shown in fig. 7, in a state where the tension adjustment is performed. As a result, as shown in the right side of fig. 9, the internal electrode layers 14 are not arranged in a zigzag manner, and a regular internal electrode layer pattern 22 can be obtained.
The left side of fig. 10 shows a state in which the support sheet 26 is deformed after printing, and the upper and lower sides of the internal electrode layer pattern 22 printed on the ceramic green sheet 21 are laterally enlarged. In this case, as shown on the right side of fig. 10, the inner frame 31 is deformed by adjusting the advance/retreat amount of the corresponding plurality of bolts 71 so as to press the upper and lower portions of the screen 61 from the left to the right toward the inside.
When the support sheet 26 is deformed after printing, the position of the internal electrode layer 14 is displaced in accordance with the deformation of the support sheet, as shown in fig. 7, in a state where the tension adjustment is performed. As a result, as shown in the right side of fig. 10, the internal electrode layers 14 are not arranged in a zigzag manner, and a regular internal electrode layer pattern 22 can be obtained.
In order to grasp the tendency of the internal electrode layer pattern 22 to be deformed by the deformation of the support sheet 26 after printing in advance, for example, the following method is employed.
As shown in fig. 11, 3 columns × 3 columns of internal electrode layers 14 are printed in a pseudo manner on the ceramic green sheet 21 supported by the support sheet 26, and immediately after the printing, the upper left corners of the internal electrode layers 14 are set as measurement points to measure the positions. After that, the time period in which the support sheet 26 is deformed including the time period in which the internal electrode layers 14 are dried is elapsed, and the measurement points are measured again to investigate the fluctuation of the measurement points. This makes it possible to grasp in advance the tendency of the internal electrode layer patterns 22 to be deformed by the support sheet 26 after printing.
Fig. 12 schematically shows a form of screen printing the 3 rd dielectric ceramic layer 13c by the screen printing plate 80. The 3 rd dielectric ceramic layer 13c is formed on the ceramic green sheet 21 by printing after the internal electrode layers 14 are printed. The screen printing plate 80 has the same structure as the screen printing plate 30 of the above embodiment which prints the plurality of internal electrode layers 14, and a plurality of openings 84 which print the 3 rd dielectric ceramic layers 13c are formed instead of the openings 64. Fig. 12 shows the longitudinal direction L and the thickness direction T of the multilayer ceramic capacitor 10.
In the following description of the screen printing plate 80, the same components as those of the screen printing plate 30 are denoted by the same reference numerals, and the description thereof will be omitted.
A thick portion 87 protruding toward the ceramic green sheet 21 is formed at an edge portion in the longitudinal direction L of the opening 84 formed in the mesh 62 of the screen 61 constituting the screen printing plate 80.
A tapered portion 14t is formed at an end portion of the existing internal electrode layer 14 in the longitudinal direction L, and the tapered portion 14t is inclined so as to expand toward the ceramic green sheet 21. The thick portion 87 of the screen 61 is formed so as to be located above the tapered portion 14t and the front end portion 14s, corresponding to the tapered portion 14t and the front end portion 14s continuous with the tapered portion 14 t.
The outer edge of the thick portion 87 facing the opening 84 is formed with a tapered surface 87a, and the tapered surface 87a is away from the opening 84 as the ceramic green sheet 21 side faces downward. By this tapered surface 87a, the 3 rd dielectric ceramic layer 13c printed on the ceramic green sheet 21 through the opening 84 is flow-printed so as to overlap the peripheral edge 14t of the tapered internal electrode layer 14.
As shown in fig. 12, overlapping portions 13e may be formed at both ends of the 3 rd dielectric ceramic layer 13c in the longitudinal direction L, and the overlapping portions 13e may overlap the peripheral edge 14t of the internal electrode layer 14 and further overlap the end 14s on the front surface side of the internal electrode layer 14 so as to be covered therewith. At this time, the conductive paste flowing so as to cover the front-side end portion 14s is raised in a cross-sectional mountain shape at the front-side end portion 14s, and is easily formed into a protrusion portion called a so-called saddle. However, such a protruding portion is difficult to form because it is pressed by the thick portion 87, and is formed in a thin and flat state as in the overlapping portion 13e shown in fig. 12. Therefore, variation in thickness is suppressed.
In the case of printing the 3 rd dielectric ceramic layer 13c on the ceramic green sheet 21 after printing the internal electrode layers 14 as described above, the screen printing plate 30 can also be used.
The left side of fig. 13 shows a state in which the 3 rd dielectric ceramic layer 13c printed between the internal electrode layer pattern 22 of the ceramic green sheet 21 and the plurality of internal electrode layers 14 is entirely deformed into a mountain shape protruding upward in the figure due to the deformation of the support sheet 26 after printing. In this case, as shown in the right-hand diagram of fig. 13, the inner frame 31 is deformed by adjusting the amount of advance and retreat of the plurality of bolts 71 at the corresponding positions so that the central portion of the screen printing plate 30 above the screen 61 is pressed downward in the figure and both side portions of the screen printing plate 30 below the screen 61 are pressed upward in the figure.
The arrows on the right side of fig. 13 indicate the strength when the inner frame 31 is pressed, and the longer the arrows, the stronger the strength.
When the 3 rd dielectric ceramic layer 13c is formed by screen printing in a state where such tension adjustment is performed, when the support sheet 26 is deformed after the formation, the positions of the internal electrode layers 14 and the 3 rd dielectric ceramic layer 13c are displaced following the deformation. As a result, as shown in the right side of fig. 13, the 3 rd dielectric ceramic layers 13c are arranged without unevenness together with the internal electrode layers 14, and the internal electrode layer pattern 22 and the 3 rd dielectric ceramic layers 13c can be obtained in order.
In this way, in the present embodiment, by using the screen printing plate 30, the 3 rd dielectric ceramic layer 13c can be formed neatly without unevenness.
According to the above embodiment, the following effects are obtained.
(1) The screen printing plate 30 of the embodiment includes: a rectangular inner frame 31; a screen 61 having a printing pattern 65 formed with openings 64 and opened to the inside of the inner frame 31 in a state of being applied with tension; an outer frame 41 disposed outside the inner frame 31 so as to surround the inner frame 31; a coupling member 51 for coupling the inner frame 31 and the outer frame 41; and bolts 71 as adjusting members for adjusting the tension of the screen 61 by applying stress to the inner frame 31 to move the inner frame 31 away from and toward the outer frame 41.
Thus, when the distortion occurs after printing, the internal electrode layer pattern 22 after printing can be formed with high accuracy as designed by adjusting the tension of the screen 61 via the inner frame 31 by the bolts 71 to correct the distortion.
(2) In the screen printing plate 30 of the embodiment, it is preferable that the edge portions 32 of the inner frame 31 have lower rigidity than the outer frame 41.
This makes it easy to deform the side portions 32 of the inner frame 31. Therefore, the tension adjustment of the screen 61 is facilitated, and as a result, the internal electrode layer pattern 22 can be formed with higher accuracy.
(3) In the screen printing plate 30 of the embodiment, the inner frame 31 is preferably divided into the sides 32 constituting four sides and the corners 33 arranged at four corners between each of the pair of adjacent sides 32.
This reduces the rigidity of the side portion 32, and the side portion 32 is easily deformed. Therefore, the tension adjustment of the screen 61 is facilitated, and as a result, the internal electrode layer pattern 22 can be formed with higher accuracy.
(4) In the screen printing plate 30 of the embodiment, the screen 61 forms the printing pattern 65 by masking the mesh 62 with the emulsion.
This enables the print pattern 65 to be formed easily.
(5) In the screen printing plate 80 of the embodiment, a thick portion 87 protruding toward the ceramic green sheet 21 as the object to be printed is provided at the edge portion of the opening 84 of the screen 61.
Thus, when a saddle-shaped protrusion is to be formed at the end of the 3 rd dielectric ceramic layer 13c printed corresponding to the opening 84, such a protrusion is difficult to form and is formed flat due to being pressed by the thick portion 87, and variation in thickness is suppressed.
(6) In the screen printing plate 30 of the embodiment, as the adjusting means for adjusting the tension of the screen 61, the bolts 71 attached to the outer frame 41 so as to be able to advance and retreat with respect to the inner frame 31 are used.
This makes it possible to easily configure the adjustment member. In addition, since the adjustment amount can be made smaller by the rotation of the bolt 71, the internal electrode layer pattern 22 can be formed with higher accuracy.
(7) The screen printing method of the embodiment is a screen printing method using the screen printing plate 30, wherein the screen printing method includes a step of grasping a tendency of the conductive paste P printed on the ceramic green sheet 21 to be deformed in a printing surface direction in advance, and after adjusting the tension of the screen 61 by the bolts 71 via the inner frame 31 to correct the tendency of the deformation, the screen printing is performed on the ceramic green sheet 21.
Thus, when the distortion occurs after printing, the internal electrode layer pattern 22 formed of the conductive paste P after printing can be formed with high accuracy as designed by adjusting the tension of the screen 61 via the inner frame 31 by the bolts 71 to correct the distortion.
(8) In the screen printing method of the embodiment, the object to be printed is the ceramic green sheet 21 constituting the multilayer ceramic capacitor 10, and the printing material is the conductive paste P to be the internal electrode layer 14.
This enables the internal electrode layers 14 of the multilayer ceramic capacitor 10 to be formed with high accuracy.
(production example)
The internal electrode layers 14 and the 3 rd dielectric ceramic layers 13c were printed in a matrix on the ceramic green sheet, the internal electrodes 14 in the center portion of each of the 4 sides including each corner were selected as the amount of deviation from the design value of each internal electrode 14 and the end portion of the overlapping portion 13e applied after the application of the internal electrodes 14, and the amounts of deviation in the L direction and the W direction were measured and averaged. The results are shown in table 1.
[ TABLE 1 ]
Figure BDA0003483016210000121
Further, a multilayer ceramic capacitor 10 having the internal electrode layers 14 and the 3 rd dielectric ceramic layers 13c formed thereon was manufactured by tension adjustment using a screen printing plate having the same structure as the screen printing plate 30 of the embodiment, and the occurrence of an electrical short circuit and a conventional multilayer ceramic capacitor having the same structure was examined. As a result, 32 short-circuit defects occurred in 100 conventional multilayer ceramic capacitors, but 0 short-circuit occurred in 100 multilayer ceramic capacitors subjected to tension adjustment.
The embodiments have been described above, but the present invention is not limited to the above embodiments, and modifications, improvements, and the like within a range that can achieve the object of the present invention are included in the present invention.
For example, the adjusting member that presses the inner frame 31 to adjust the tension of the screen 61 is not limited to the bolt 71, and may be another member as long as the same action can be applied to the inner frame 31.
The internal electrode layers of the multilayer ceramic capacitor are first printed, and the 3 rd dielectric ceramic layer 13c is then printed, but the order of printing is not limited, and may be reversed.
The screen printing plate of the embodiment is applied to printing of the internal electrode layers and the dielectric ceramic layers of the laminated ceramic capacitor, but the printing object and the printing material are arbitrary and are not limited thereto.

Claims (8)

1. A screen printing plate, wherein,
the screen printing plate includes:
a rectangular inner frame;
a screen having a printing pattern formed with an opening, the screen being opened to an inner side of the inner frame in a state of being applied with tension;
an outer frame disposed outside the inner frame so as to surround the inner frame;
a connecting member that connects the inner frame and the outer frame; and
an adjusting member for adjusting tension of the screen by applying stress to the inner frame to move the inner frame away from and toward the outer frame.
2. The screen printing plate of claim 1,
the rigidity of the inner frame is lower than that of the outer frame.
3. The screen printing plate according to claim 1 or 2,
the inner frame is divided into sides constituting four sides and corner portions arranged at four corners between each of a pair of adjacent sides.
4. The screen printing plate according to any one of claims 1 to 3,
the screen includes a mesh forming the print pattern by masking the mesh with an emulsion.
5. The screen printing plate according to any one of claims 1 to 4,
the edge portion of the opening of the screen has a thick portion protruding toward the printed object.
6. The screen printing plate according to any one of claims 1 to 5,
the adjustment member is a screw member that can be attached to the outer frame so as to advance and retreat with respect to the inner frame.
7. A screen printing method using the screen printing plate according to any one of claims 1 to 6,
the screen printing method comprises a step of grasping a tendency of a printing material printed on a printing object to form a pattern in a printing surface direction in advance,
and screen-printing the printed matter after adjusting the tension of the screen by means of the inner frame using the adjusting member to correct the tendency of the deformation.
8. The screen printing method according to claim 7, wherein,
the object to be printed is a dielectric sheet,
the printing material is a conductive paste.
CN202210073168.XA 2021-01-26 2022-01-21 Screen printing plate and screen printing method Pending CN114789597A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2021010264A JP2022114115A (en) 2021-01-26 2021-01-26 Screen printing plate and screen printing method
JP2021-010264 2021-01-26

Publications (1)

Publication Number Publication Date
CN114789597A true CN114789597A (en) 2022-07-26

Family

ID=82460622

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210073168.XA Pending CN114789597A (en) 2021-01-26 2022-01-21 Screen printing plate and screen printing method

Country Status (3)

Country Link
JP (1) JP2022114115A (en)
KR (1) KR20220107928A (en)
CN (1) CN114789597A (en)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0852952A (en) * 1994-08-17 1996-02-27 Sony Corp Printing plate
JPH09109364A (en) * 1995-10-16 1997-04-28 Shinya Tomita Screen printing screen frame
JP2000015777A (en) * 1998-04-27 2000-01-18 Process Lab Micron:Kk Mask part-replaceable combination masking plate for printing and manufacture thereof
JP2002307857A (en) * 2001-04-12 2002-10-23 Murata Mfg Co Ltd Screen printing plate and manufacturing method therefor
JP2003025538A (en) * 2001-07-16 2003-01-29 Tdk Corp Method for manufacturing screen plate
JP2003039633A (en) * 2001-08-01 2003-02-13 Ngk Spark Plug Co Ltd Method for screen process printing, method for producing, ceramic circuit board, and mask for screen process printing
JP2006062241A (en) * 2004-08-27 2006-03-09 Ngk Insulators Ltd Plate for screen printing and manufacturing method of printing body using the same
JP2010158903A (en) * 2010-03-15 2010-07-22 Bonmaaku:Kk Method of manufacturing screen printing plate
CN208359680U (en) * 2018-06-28 2019-01-11 昆山万源通电子科技有限公司 A kind of PCB screen printing forme

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004304000A (en) 2003-03-31 2004-10-28 Tdk Corp Laminate unit for laminated ceramic electronic component and method for manufacturing same

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0852952A (en) * 1994-08-17 1996-02-27 Sony Corp Printing plate
JPH09109364A (en) * 1995-10-16 1997-04-28 Shinya Tomita Screen printing screen frame
JP2000015777A (en) * 1998-04-27 2000-01-18 Process Lab Micron:Kk Mask part-replaceable combination masking plate for printing and manufacture thereof
JP2002307857A (en) * 2001-04-12 2002-10-23 Murata Mfg Co Ltd Screen printing plate and manufacturing method therefor
JP2003025538A (en) * 2001-07-16 2003-01-29 Tdk Corp Method for manufacturing screen plate
JP2003039633A (en) * 2001-08-01 2003-02-13 Ngk Spark Plug Co Ltd Method for screen process printing, method for producing, ceramic circuit board, and mask for screen process printing
JP2006062241A (en) * 2004-08-27 2006-03-09 Ngk Insulators Ltd Plate for screen printing and manufacturing method of printing body using the same
JP2010158903A (en) * 2010-03-15 2010-07-22 Bonmaaku:Kk Method of manufacturing screen printing plate
CN208359680U (en) * 2018-06-28 2019-01-11 昆山万源通电子科技有限公司 A kind of PCB screen printing forme

Also Published As

Publication number Publication date
KR20220107928A (en) 2022-08-02
JP2022114115A (en) 2022-08-05

Similar Documents

Publication Publication Date Title
US6475317B1 (en) Method for manufacturing electronic component of laminated ceramics
US9076597B2 (en) Monolithic ceramic capacitor
US7295420B2 (en) Multilayer electronic component and manufacturing method thereof
US6829134B2 (en) Laminated ceramic electronic component and method for manufacturing the same
US7739950B2 (en) Method for manufacturing ceramic electronic component and gravure printing method
US20080100988A1 (en) Multilayer capacitor
KR20060043820A (en) Laminated ceramic capacitor
US20020020310A1 (en) Screen-printing plate, manufacturing method of laminated- ceramic electronic devices, and laminated-ceramic electronic device manufactured by the method
US7828033B2 (en) Method of manufacturing multilayer capacitor and multilayer capacitor
US11065903B2 (en) Gravure printing plate, gravure printing method, and manufacturing method for electronic component
JP7148343B2 (en) Multilayer ceramic electronic component manufacturing method and multilayer ceramic electronic component
JP2002184648A (en) Laminated ceramic electronic component and its manufacturing method
JPH09153433A (en) Manufacture of laminated electronic component
CN114789597A (en) Screen printing plate and screen printing method
US10354797B2 (en) Ceramic electronic component and method for producing same
JP3744368B2 (en) Manufacturing method of multilayer ceramic capacitor
JP2766085B2 (en) Manufacturing method of laminate
JP3159344B2 (en) Manufacturing method of ceramic laminated electronic component
JP2005136146A (en) Capacitor
JP3879700B2 (en) Manufacturing method of multilayer ceramic capacitor
JPH06349663A (en) Impression for screen printing, multilayered electronic component and multilayered ceramic capacitor
JP2001039048A (en) Production of printing pattern forming material and laminated ceramic electronic part
JP4046194B2 (en) Manufacturing method of ceramic electronic component
DE112022001470T5 (en) FASTENING STRUCTURE FOR A CHIP COMPONENT
JP2003188043A (en) Manufacturing method for laminated electronic component

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination