JP2017124596A - Planographic printing method and planographic printing apparatus used for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a planographic printing method, and a planographic printing apparatus used for the same.SOLUTION: The planographic printing method comprises: providing a planographic plate having a lot of cells formed by intaglio on the surface; charging a lot of cells with printing paste; and contacting a sheet to the lot of cells having the charged printing paste using a pressure moving roll to transfer the printing paste on the sheet. The sheet is provided on the planographic plate by a roll-to-roll method. The planographic printing method uses the planographic printing device.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a planographic printing method and a planographic printing apparatus used therefor.

  A multilayer ceramic capacitor (MLCC) is a passive component that instantaneously charges electricity with an electronic device.

  Multilayer ceramic capacitors are usually formed by sintering a plurality of dielectric layers and a plurality of internal electrodes printed on the plurality of dielectric layers and alternately drawn to the outside, and plating and paste on the outside of the body Consists of external electrodes formed by printing or the like.

  At this time, conventionally, screen printing has been used as a method of forming internal electrodes in the process of manufacturing such a multilayer ceramic capacitor.

  On the other hand, in order to pursue the miniaturization and high performance functions of electronic devices, there is an urgent need for monolithic ceramic capacitors with a small size and ultra-high capacity.

  However, in order to develop a small-sized and high-capacity model, there is no pattern deformation during printing, and it is necessary to embody the printed shape in a substantially square shape. There was a limit.

  One of the various objects of the present invention is to solve such a problem, and there is no pattern deformation at the time of printing, the printing shape can be realized in a substantially square shape, and a new printing capable of continuous printing. An object of the present invention is to provide a printing method and a printing apparatus used therefor.

  One of various solutions proposed through the present invention is provided in a roll-to-roll method by filling a large number of cells of a lithographic plate having a large number of cells formed in a surface on a surface with a printing paste. The sheet is pressed using a pressure roll and brought into contact with the surface of the lithographic plate to transfer the printing paste directly onto the sheet.

  According to the present invention, a step of providing a lithographic plate having a large number of cells formed on the surface in a negative pattern, a step of filling the large number of cells with a printing paste, and a pressure applied to the large number of cells filled with the printing paste. Transferring the printing paste to the sheet using a moving roll to contact the sheet, the sheet being provided to the lithographic plate in a roll-to-roll manner, A lithographic printing method is provided.

  According to the present invention, a lithographic plate having a large number of cells formed in a negative pattern on the surface, a chamber doctor for applying a printing paste to the surface of the lithographic plate and filling the large number of cells with the printing paste, A lithographic printing apparatus comprising: a pressure roll that pressurizes a sheet provided to the lithographic plate in a roll-to-roll manner and contacts the sheet with a number of cells filled with the printing paste. Provided.

  As one of the various effects of the present invention, there is provided a new printing method and a printing apparatus used therefor, in which there is no deformation of the pattern during printing, the printing shape can be embodied in a substantially square shape, and continuous printing is possible. Can be provided.

  According to the present invention, the conventional high-viscosity paste for screen printing can be used, and the pattern shape can be embodied in a square shape, so that the electrode connectivity at the pattern edge is improved and the capacitance of the multilayer ceramic capacitor is improved. Increase and reliability can be ensured.

  According to the present invention, it is possible to perform thin film printing of 0.1 μm or less by reducing the size of the indented cell formed on the lithographic surface and reducing the cell depth. As a result, it can be used in conformity with the manufacture of products that require a small size and a high capacity.

  According to the present invention, since the cell size and depth of the lithographic surface can be manufactured in various ways, depending on the applied product, the pattern thickness can be made thinner and the number of stacks can be increased. it can. As a result, the capacity can be further increased.

  According to the present invention, cells are formed on the lithographic plate in a negative manner, and the lithographic plate is fixed and then printed. Therefore, unlike conventional screen printing, there is almost no pattern deformation due to the number of times of use, thereby minimizing defects in subsequent processes. Can do.

  According to the present invention, when a cell is formed on a lithographic plate, a pattern can be designed in advance, and the designed pattern can be copied and attached, so that the size of the pattern can be made the same. As a result, the size distribution of the print pattern can be minimized.

1 illustrates a schematic system of a lithographic printing method according to an example. 1 illustrates a schematic perspective view of a lithographic printing apparatus according to an example. FIG. 4 illustrates a schematic cross-sectional view of a fixation plate according to an example. Figure 2 illustrates a schematic plan view of a lithographic plate according to an example. FIG. 3 illustrates a schematic cross-sectional view of a chamber doctor according to an example. 1 shows a schematic process flowchart of a planographic printing method using a planographic printing apparatus according to an example. 1 schematically illustrates a printing paste filling process of a planographic printing method using a planographic printing apparatus according to an example. 1 schematically illustrates a printing paste transfer process of a planographic printing method using a planographic printing apparatus according to an example. 2 illustrates a printing pattern formed by a planographic printing method according to an example. The printing pattern formed by the screen printing method is illustrated.

  Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings. The shape and size of elements in the drawings may be exaggerated for a clearer description.

  FIG. 1 illustrates a schematic system of a lithographic printing method according to an example.

  Referring to the drawings, a system of a planographic printing method according to an example includes a step of feeding a wound sheet by an unwinder 100 and conveying it to a printing device 200, a step of transferring a printing paste to a sheet by the printing device 200, and a printing paste. A step of conveying the sheet on which the ink is transferred to the drying device 300, a step of drying the printing paste transferred by the drying device 300 to form a printing pattern, and a sheet on which the printing pattern is formed are conveyed to the rewinder 400. And the step of winding.

  The unwinder 100 and the rewinder 400 may be a part of a roll-to-roll facility, and thus use the roll-to-roll facility to print on a sheet. Continuous printing is possible. Such a roll-to-roll facility can be provided with a large number of support rolls (not labeled), and the large number of support rolls serve to support and move the sheet.

  The printing apparatus 200 may be a lithographic printing apparatus as will be described later, and the specific contents thereof will be described later.

  The drying apparatus 300 may use an apparatus in a form normally used in the art, and may be integrated with a roll-to-roll facility. For example, the drying apparatus 300 may include a drying chamber, and in this case, drying may be performed in a chamber disconnected from the outside. Further, nitrogen or argon can be injected into the chamber, and the internal pressure and the like can be adjusted appropriately.

  FIG. 2 illustrates a schematic perspective view of a lithographic printing apparatus according to an example.

  Referring to the drawings, a lithographic printing apparatus 200 according to an example includes a lithographic plate 202 provided with a large number of cells 203 formed on a surface thereof, and a printing paste is applied to the surface of the lithographic plate 202. A chamber doctor 204 to be filled and a pressure roll 206 that pressurizes the sheet 101 provided on the planographic plate 202 in a roll-to-roll manner to bring the sheet 101 into contact with a large number of cells 203 filled with the printing paste.

  The lithographic plate 202 is a printing plate on which a printing pattern is primarily engraved, and a large number of cells 203 for forming such a printing pattern are formed on the surface of the lithographic plate 202 in a negative manner. The material of the lithographic plate 202 is not particularly limited, and may be, for example, a glass material, a nickel (Ni) material, a resin material, a SUS material, or the like, but is not limited thereto.

  The large number of negative cells 203 formed on the surface of the planographic plate 202 can be formed small in size and can be formed thin. In this case, thin film printing of 0.1 μm or less is possible, and as a result, it can be used in conformity with the manufacture of products that require a small size and a high capacity. In addition, since the large number of indented cells 203 formed on the surface of the planographic plate 202 can be manufactured in various sizes and depths, the thickness of the pattern can be made thinner depending on the applied product. And the number of stacked layers can be increased. As a result, the capacity can be further increased.

  Unlike the conventional screen printing, since many negative cells 203 formed on the surface of the lithographic plate 202 are formed and the lithographic plate 202 is fixed, the printing pattern is hardly deformed by the number of times of use. Process defects can be minimized. In addition, when a large number of indented cells 203 are formed on the surface of the planographic plate 202, the pattern can be designed in advance, and the designed pattern can be copied and attached, so that the pattern can be produced with the same size. it can. As a result, the size distribution of the print pattern can be minimized.

  The chamber doctor 204 applies a printing paste on the surface of the planographic plate 202 and fills a large number of cells 203 with the printing paste. The chamber doctor 204 may be a sealed chamber doctor 204 in which the printing paste is disposed in an arrangement space therein. When the sealed chamber doctor 204 is used in this way, the printing paste is all from low viscosity to high viscosity. It can be used. A printing paste can be placed in the sealed chamber doctor 204. The specific form of the chamber doctor 204 is not particularly limited, and the material is not particularly limited.

  The pressure roll 206 plays a role of pressing the sheet 101 to contact the surface of the planographic plate 202. The pressure roll 206 can be formed of an elastic material, and can be moved up and down by a driving member 207 described later. The pressure roll 206 may have a shape in which the diameter decreases from the center in the length direction toward the edge. In this case, the pressure roll 206 is deformed flatly so that the pressure applied to the sheet 101 is uniform. However, the present invention is not necessarily limited to this, and may be formed of other materials or may have a shape having the same diameter.

  If necessary, the lithographic printing apparatus 200 according to an example may further include a fixing plate 201 that fixes the lithographic plate 202. In addition, a driving member 207 for moving the pressure roll 206 up and down can be further included.

  The fixing plate 201 is a structure for fixing the lithographic plate 202 in order to eliminate pattern deformation during printing. As a method of fixing the lithographic plate 202, when such a fixing plate 201 is used instead of a bolt or a locking type, there is an advantage that the pattern is not shaken because the assembly is easy and the fixing force is good.

  The drive member 207 is configured to move the pressure roll 206 up and down, and through this, the pressure roll 206 can apply pressure to the sheet 101. For example, the driving member 207 may be formed of an air cylinder (not shown) that is connected to both ends of the central axis of the pressure roll 206 to raise and lower the pressure roll 206, but is not limited thereto.

  The driving member 207 may include upper and lower sensors (not shown) for controlling the lifting and lowering distance of the pressure roll 206. In this case, it may further include a control member (not shown) that is connected to upper and lower sensors (not shown) and controls the raising and lowering distance of the pressure roll 206 by signals sent from these sensors.

  FIG. 3 illustrates a schematic cross-sectional view of a fixation plate according to an example.

  Referring to the drawing, a fixing plate 201 according to an example is provided with a number of vacuum holes 201h. For example, it includes a first plate 201a in which a large number of vacuum holes 201h are processed, and a second plate 201b disposed on the first plate 201a. The planographic plate 202 may be fixed on the second plate 201b.

  The first plate 201a in which a large number of vacuum holes 201h are processed may be a normal steel material, and the second plate 201b may be a normal ceramic material, but is not limited thereto. . The vacuum hole 201h can be formed on the surface of the first plate 201a and can be covered with the second plate 201b.

  FIG. 4 illustrates a schematic plan view of a lithographic plate according to an example.

  Referring to the drawing, on the surface of the planographic plate 202 according to an example, a large number of cells 203 formed in a negative pattern are formed. At this time, the large number of cells 203 are based on a direction orthogonal to the printing direction (arrow) of the planographic plate 202. As shown, a large number of first cells 203 a formed at the edge of the lithographic plate 202 and a large number of second cells 203 b formed at the center of the lithographic plate 202 are included.

The size S ₁ of the first cell 203 a formed at the edge of the planographic plate 202 may be larger than the size S ₂ of the second cell 203 b formed at the center of the planographic plate 202. In this case, the printing paste transferred to the sheet 101 can be embodied in a rectangular shape instead of a dome shape. As a result, the electrode connectivity can be improved and the capacity can be increased. Here, the square shape means that it is not a perfect square shape but a substantially square shape (see FIG. 9).

Specifically, larger form sizes S ₁ of the edge cell 203a, when formed small size S ₂ of the center cells 203b, transfer amount of the printing paste on the sheet 101 is increased in the edge, the At this time, since the transferred printing paste is leveled and dried while being leveled, it can be realized close to a square shape. In addition, when the printing shape is a square shape, the effective area is wider than that of the dome shape even under the same conditions, so that it is more effective to implement the capacity.

  FIG. 5 illustrates a schematic cross-sectional view of a chamber doctor according to an example.

  Referring to the drawings, a chamber doctor 204 according to an example includes a main body 204a, a placement space 204b of a printing paste 208 provided in the main body 204a, and squeegees 204c provided on both sides of the main body 204a. Further, a squeegee hold 204d that supports the squeegee 204c can be further included as necessary. The chamber doctor 204 having such a structure may be a sealed chamber doctor. In this case, as described above, the printing paste 208 can be used from bottom viscosity to high viscosity.

  The main body 204a is a body of the chamber doctor 204, and other components are coupled around the main body 204a. The specific form and material of the main body 204a are not particularly limited, and any form and material can be applied as long as the printing paste 208 can be applied while moving the surface of the planographic plate 202.

  The arrangement space 204b is a space in which the printing paste 208 is arranged. In this way, the printing paste 208 can be arranged in a sealed manner, and as described above, the printing paste 208 can be used from bottom viscosity to high viscosity. There is an advantage of being. The specific form and material of the arrangement space 204b are not particularly limited, and forms and materials well known in the technical field can be applied.

  The squeegee 204 c is configured to scrape out the printing paste remaining on the surface of the planographic plate 202 and remove the printing paste remaining on the surface of the planographic plate 202, and through this, a large number of cells 203 formed by engraving the planographic plate 202. The printing paste can be filled only in the interior. Specific forms and materials of the squeegee 204c are not particularly limited, and forms and materials well known in the art can be applied.

  FIG. 6 illustrates a schematic process flowchart of a planographic printing method using a planographic printing apparatus according to an example.

  Referring to the drawings, a planographic printing method 1001 according to an example includes a step of providing a plurality of lithographic cells having a number of cells formed on a surface in an intaglio, a step of filling a printing paste, and a step of filling the printing paste. And a step of contacting the sheet with a number of cells using a pressure roll to transfer the printing paste to the sheet. If necessary, the lithographic printing method 2001 according to an example may further include a step of drying the sheet to which the printing paste is transferred.

  FIG. 7 illustrates a schematic printing paste filling process of a planographic printing method using a planographic printing apparatus according to an example.

  Referring to the drawings, the printing paste filling process according to an example applies the printing paste 208 to the surface of the lithographic plate 202 using the chamber doctor 204, and uses the squeegee 204 c provided on the surface of the lithographic plate 202 to the chamber doctor 204. And scrape it out.

  The printing paste 208 varies depending on the product to be applied. For example, when printing internal electrodes of a multilayer ceramic capacitor, the printing paste 208 may include a mixture of conductive powder, resin, solvent, and the like, but is not limited thereto.

  Various conductive metals such as silver (Ag), gold (Au), platinum (Pt), copper (Cu), aluminum (Al), nickel (Ni) can be used for the conductive powder. . At this time, the metal may be an alloy. Moreover, you may use what coat | covered other metal to the particle | grains of electroconductive powder. The shape of the particles may be various shapes such as a spherical shape, a dendrite shape, and a flake shape.

  As the resin, for example, various resins such as a thermosetting resin, an ultraviolet curable resin, and a thermoplastic resin are used. Examples of the thermosetting resin include melamine resin, epoxy resin, phenol resin, polyimide resin, and acrylic resin. Examples of the ultraviolet curable resin include an acrylic resin having a (meth) acryloyl group, an epoxy resin, a polyester resin, and a mixture of these with a monomer. Moreover, as a thermoplastic resin, a polyester resin, polyvinyl butyral resin, a cellulose resin, an acrylic resin etc. are mentioned, for example. These resins may be used alone or in combination of two or more.

  In order to prevent the printing paste 208 from being dried in the printing process, the solvent preferably contains, for example, a high boiling point solvent having a boiling point of 240 ° C. or higher. Examples of such high-boiling solvents include diamylbenzene, triamylbenzene, diethylene glycol, diethylene glycol monobutyl ether acetate, diethylene glycol dibutyl ether, diethylene glycol monoacetate, triethylene glycol, triethylene glycol monomethyl ether, and triethylene glycol monoethyl ether. , Triethylene glycol monobutyl ether, tetraethylene glycol, tetraethylene glycol monobutyl ether and the like. However, it is needless to say that the present invention is not limited to this, and a low boiling point solvent can also be used.

  FIG. 8 illustrates a schematic printing paste transfer process of a planographic printing method using a planographic printing apparatus according to an example.

  Referring to the drawings, in the transfer process of the printing paste according to an example, the sheet 101 moving in the printing direction (arrow) is pressed using the pressure roll 206 to move the printing paste 208 of the planographic plate 202 moving in the printing direction (arrow). Is brought into contact with a large number of cells 203 filled with.

  The moving direction of the sheet 101 and the moving direction of the lithographic plate 202 are the same as the printing direction, and the lithographic plate 202 moves while being fixed to the vacuum plate 201. During such movement, the sheet 101 and the surface of the lithographic plate 202 come into contact with each other by the pressure roll 206, and at this time, the printing paste 208 of the lithographic plate 202 is directly transferred to the sheet 101.

  The sheet 101 differs depending on a product to be applied. For example, the sheet 101 may be a dielectric sheet as long as the internal electrode of the multilayer ceramic capacitor is printed, but is not limited thereto.

The dielectric sheet may be formed of a ceramic powder having a high dielectric constant, and the ceramic powder may be, for example, a barium titanate (BaTiO ₃ ) -based powder or a strontium titanate (SrTiO ₃ ) -based powder. However, the present invention is not limited to this, and it goes without saying that other known ceramic powders can also be used. The dielectric sheet can be formed by applying a slurry containing such ceramic powder on a carrier film and drying to provide a plurality of ceramic green sheets. In other words, the sheet 101 can be formed on a carrier film although not specifically shown in the drawing.

  FIG. 9 illustrates a printing pattern formed by a planographic printing method according to an example.

  FIG. 10 illustrates a printing pattern formed by the screen printing method.

  Referring to the drawings, it can be seen that a printing pattern manufactured by a planographic printing method according to an example can be implemented in a square shape. Meanwhile, it can be seen that the printing pattern formed by the conventional screen printing method has a dome shape. In the case where a rectangular shape can be realized, such as a printing pattern manufactured by a planographic printing method according to an example, the electrode connectivity can be improved and the capacity can be increased as described above.

  The first and second expressions used in the present invention are used to distinguish one component from another component. The order and / or importance of the corresponding component is indicated. Not limited. In some cases, the first component may be named the second component, and similarly, the second component may be named the first component without departing from the scope of the present invention.

  Further, the expression “example” used in the present invention does not mean the same embodiment, but is provided to emphasize and explain different and unique features. However, the presented example does not exclude being realized in combination with other example features. For example, even if a matter described in a specific example is not explained in another example, the explanation is related to the other example as long as there is no explanation contrary to or contradicting the matter in another example. Can be understood.

  It should be noted that the terms used in the present invention are merely used to describe an example, and are not intended to limit the present invention. At this time, the singular includes the plural unless the context clearly indicates otherwise.

  As mentioned above, although embodiment of this invention was described in detail, the scope of the present invention is not limited to this, and various correction and deformation | transformation are within the range which does not deviate from the technical idea of this invention described in the claim. It will be apparent to those having ordinary knowledge in the art.

DESCRIPTION OF SYMBOLS 100 Unwinder 200 Printing apparatus 300 Drying apparatus 400 Rewinder 101 Sheet 201 Vacuum plate 201a 1st plate 201b 2nd plate 201h Vacuum hole 202 Flat plate 203 Cell 203a Edge cell 203b Center part cell 204 Chamber doctor 204a Main body 204b Arrangement space 204c Squeeze 204d squeegee hold 206 pressure roll 207 driving member

Claims (16)

Providing a lithographic plate provided with a number of cells formed in a negative pattern on the surface;
Filling the plurality of cells with printing paste;
Transferring the printing paste to the sheet by bringing a sheet into contact with a number of cells filled with the printing paste using a pressure roll;
The sheet is provided to the planographic plate in a roll-to-roll manner.
Lithographic printing method. The plurality of cells are based on a direction orthogonal to the printing direction of the planographic plate,
A number of first cells formed at the edge of the lithographic plate;
A plurality of second cells formed in the center of the lithographic plate,
The size of the first cell is greater than the size of the second cell;
The planographic printing method according to claim 1. The printing pattern formed by transferring the printing paste has a square shape,
The planographic printing method according to claim 2. In the step of providing the lithographic plate,
Fixing the lithographic plate to a fixing plate having a number of vacuum holes;
The planographic printing method according to any one of claims 1 to 3. The fixed plate includes a first plate in which a number of vacuum holes are processed,
A second plate disposed on the first plate,
The planographic plate is fixed on the second plate;
The planographic printing method according to claim 4. In the step of filling the printing paste,
Applying the printing paste to the surface of the lithographic plate using a chamber doctor, and scraping the surface of the lithographic plate using a squeegee provided in the chamber doctor;
The planographic printing method according to any one of claims 1 to 5. In transferring the printing paste,
The sheet moving in the printing direction is pressed with the pressure roll and brought into contact with a large number of cells filled with the printing paste.
The planographic printing method according to any one of claims 1 to 6. Further comprising the step of drying the sheet to which the printing paste is transferred.
The lithographic printing method according to any one of claims 1 to 7. The sheet is unwound from the unwinder before drying and conveyed to the planographic plate, conveyed to the rewinder after the transfer and drying, and wound.
The planographic printing method according to claim 8. A lithographic plate provided with a number of cells formed on the surface in a negative pattern;
A chamber doctor for applying a printing paste to the surface of the lithographic plate and filling the plurality of cells with the printing paste;
A pressure roll that pressurizes a sheet provided to the lithographic plate in a roll-to-roll manner, and contacts the sheet with a number of cells filled with the printing paste,
Lithographic printing device. The plurality of cells are based on a direction orthogonal to the printing direction of the planographic plate,
A number of first cells formed at the edge of the lithographic plate;
A plurality of second cells formed in the center of the lithographic plate,
The size of the first cell is greater than the size of the second cell;
The planographic printing apparatus according to claim 10. The printing pattern formed by transferring the printing paste has a square shape,
The planographic printing apparatus according to claim 11. The chamber doctor is
The body,
An arrangement space for the printing paste provided in the main body,
Including squeegees provided on both sides of the main body,
The lithographic printing apparatus according to any one of claims 10 to 12. The lithographic plate is fixed, and further includes a fixing plate provided with a number of vacuum holes.
The lithographic printing apparatus according to any one of claims 10 to 13. The fixing plate is
A first plate with a number of vacuum holes machined;
A second plate disposed on the first plate,
The planographic plate is fixed on the second plate;
The planographic printing apparatus according to claim 14. It further includes a drive member for raising and lowering the pressure roll.
The planographic printing apparatus according to any one of claims 10 to 15.