JP4356186B2 - Screen printing plate and manufacturing method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a screen printing plate used for screen printing, and more particularly to a screen printing plate intended to suppress or prevent bleeding of printed graphics and dimensional changes of printed graphics due to wear, and a method for manufacturing the same.
[0002]
[Prior art]
For example, in the field of laminated electronic components, when an internal electrode is formed on a laminated green sheet, a screen printing method is widely used as a method for obtaining a predetermined printed figure. A printing plate (screen printing plate) used in this screen printing method has a graphic pattern of a predetermined shape corresponding to the graphic to be printed, and has a high dimension so that a desired printed graphic can be obtained. Manufactured with precision.
[0003]
4 is a perspective view showing a main part of a conventional screen printing plate 51, and FIG. 5 is a sectional view thereof. As shown in FIGS. 4 and 5, the screen printing plate 51 includes a mesh hole forming area (mesh area) 52 in which mesh holes (through holes) 54 through which a paste to be printed (for example, electrode paste) is passed, A mesh hole is not formed, and a mesh hole non-formation region (non-mesh region) 53 through which the paste does not pass is provided.
[0004]
The mesh area 52 is an area surrounded by a broken line 100 and has a planar shape corresponding to the printed figure. In the mesh area 52, a plurality of mesh holes 54 having a predetermined shape are arranged in a predetermined pattern. It is installed.
[0005]
In addition, a concave portion 55 having a planar shape corresponding to the printed figure is formed on the surface of the screen printing plate 51 facing the substrate 59.
[0006]
The screen printing plate 51 corresponds to the concave portion 55 on the mesh region metal film 56 for forming the mesh region formed by, for example, an electroforming method which is a kind of matte plating method. It is manufactured by forming a recess-forming metal film 57 that is provided with a planar opening 58 and is integrated with the mesh region metal film 56 to form the recess 55.
In this screen printing plate 51, the surface roughness (Ra value) of the surface (contact surface) 51a in contact with the substrate 59 and the lower surface (ceiling surface of the recess 55) 56a of the mesh region metal film 56 is Is about 1.6 to 2.2 μm.
[0007]
[Problems to be solved by the invention]
By the way, when printing the paste 60 using the conventional screen printing plate 51, as shown in FIG. 6, the paste 60 is supplied from the mesh hole 54 of the mesh region 52 into the recess 55 by a squeegee, Printing is performed on the substrate 59 through the recess 55, and a predetermined printed figure is formed.
[0008]
However, since the surface roughness (Ra value) of the contact surface 51 a of the screen printing plate 51 with the substrate 59 is as rough as 1.6 to 2.2 μm, the paste 60 is formed between the contact surface 51 a and the substrate 59. Since it oozes out from the gaps on the surface 59a, there is a problem that a printed figure with a desired pattern cannot be obtained.
[0009]
Further, when the number of times the screen printing plate 51 is used (number of times of printing) increases, the contact surface 51a of the screen printing plate 51 with the substrate 59 is worn, and the surface state (roughness) changes, and the printed figure is changed. There is a problem in that the size and shape of the fluctuate.
[0010]
The present invention solves the above-described problems, and can suppress and prevent paste bleeding and wear on the contact surface with the printing medium, and can stably produce a desired printed figure for a long period of time. It is an object of the present invention to provide a screen printing plate capable of performing high-accuracy screen printing and a method for producing the same.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, the inventors have conducted various experiments and examinations to reduce the surface roughness of the contact surface of the screen printing plate with the printing material, thereby allowing the paste to ooze out and screen printing. Knowing that the wear of the plate is suppressed, further experimentation was conducted to complete the present invention.
[0012]
That is, the screen printing plate of the present invention (Claim 1) is:
A mesh hole forming region (mesh region) in which a plurality of mesh holes through which the paste passes are formed;
A mesh hole non-formation area (non-mesh area) in which no mesh hole that allows the paste to pass is formed,
A screen printing plate comprising: a concave portion having a planar shape corresponding to a predetermined printed figure formed on a surface of the mesh region facing the substrate;
(a) a metal film in which the mesh region is formed (metal film for mesh region);
(b) provided with an opening having a shape corresponding to the recess, and joined to the mesh region metal film, the recess forming metal film constituting the recess together with the mesh region metal film,
The mesh region metal film and the recess forming metal film each have a thickness in the range of 1 to 100 μm,
The Ra value of the surface in contact with the substrate to be printed is in the range of 0.01 to 0.30 μm,
The mesh region metal film is formed by a matte plating method, and the concave portion forming metal film is formed by a bright plating method.
[0013]
The screen printing plate includes (a) a mesh region metal film that forms a mesh region, and (b) a concave portion forming metal film that forms a recess together with the mesh region metal film, and the mesh region metal film And the thickness of the metal film for forming recesses is 1 to 100 μm, respectively, and the surface roughness of the surface (contact surface) in contact with the substrate to be printed, that is, the Ra value is in the range of 0.01 to 0.30 μm. By suppressing and preventing paste oozing, the wear of the contact surface due to repeated use of the screen printing plate is suppressed, and the change in the size and shape of the printed figure is suppressed and prevented over a long period of time. High-quality screen printing can be performed.
[0014]
In addition, because it has a structure comprising a metal film for mesh area formed by matte plating method and a metal film for recess formation formed by gloss plating method, plating is not required without complicated manufacturing processes. Only by the method, the mesh region metal film and the recess forming metal film can be efficiently formed.
[0015]
In addition, when the screen printing plate is formed only by the bright plating method, the printed figure tends to be stretched due to the compressive stress of the bright plating film, and the figure size tends to increase. It is possible to improve the figure dimensional accuracy by suppressing the growth of printed figures by using a two-layer structure consisting of two types of plating films: a metal film for regions) and a bright plating film (metal film for forming recesses). become.
[0016]
The matte plating method is a concept that means a method of plating in a plating bath to which an additive (brightening agent) that affects the surface roughness is not added. It is a concept that means a method of performing plating in a plating bath to which an additive (brightening agent) that affects roughness is added.
[0017]
Further, the method for producing a screen printing plate of the present invention (Claim 2),
A method for producing a screen printing plate according to any one of claims 1-3,
A metal film for forming a mesh region is formed by matte plating, and then a metal film for forming recesses is formed on the metal film for mesh region by gloss plating.
[0018]
After forming the metal film for mesh region by matte plating method, the surface roughness of the contact surface with the substrate to be printed is formed on the metal film for mesh region by gloss plating method. That is, it is possible to efficiently produce the screen printing plate of the present invention having a low Ra value of 0.01 to 0.30 μm and less wear on the contact surface with the printing medium. It can be tightened.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the features of the present invention will be described in more detail with reference to embodiments of the present invention.
FIG. 1 is a perspective view showing a main part of a screen printing plate according to an embodiment of the present invention, and FIG. 2 is a sectional view thereof.
[0020]
The screen printing plate 1 is made of a nickel metal material, and has a mesh hole forming region (mesh region) 2 in which mesh holes (through holes) 4 through which a paste to be printed (for example, electrode paste) passes are formed, And a mesh hole non-formation region (non-mesh region) 3 in which no mesh hole is formed.
[0021]
The mesh area 2 is an area surrounded by a broken line 200 and has a planar shape corresponding to a printed figure. In the mesh area 2, a plurality of mesh holes 4 having a predetermined shape are formed in a predetermined pattern. It is arranged by.
[0022]
In addition, a concave portion 5 having a planar shape corresponding to a predetermined printed figure is formed on a surface (contact surface) 1 a of the screen printing plate 1 that is in contact with the substrate 9.
This screen printing plate 1 includes a mesh region metal film (mesh region nickel film) 6 constituting a mesh region and a planar opening 8 corresponding to the recess 5. 5 has a two-layer structure composed of a concave-forming metal film (a concave-forming nickel film) 7.
[0023]
In the screen printing plate 1 of this embodiment, the film thickness A (FIG. 2) of the mesh region nickel film 6 and the film thickness B (FIG. 2) of the recess forming nickel film 7 are 50 μm, respectively. .
Further, the surface roughness (Ra value) of the surface (contact surface) 1a of the screen printing plate 1 in contact with the substrate 9 is 0.1 μm.
[0024]
Next, the manufacturing method of said screen printing plate 1 is demonstrated.
(1) First, a nickel film 6 for a mesh region having a film thickness of 1 to 100 μm (in this embodiment, 50 μm) is formed by an electroforming method (electroforming method) through a resist having a mesh pattern shape.
At this time, matte plating is performed using a nickel sulfamate bath for matte plating as the plating bath. As a result, the surface roughness (Ra value) of the surface (the ceiling surface of the recess 5) 6a of the mesh region nickel film 6 facing the substrate 9 is 1.6 to 2.2 μm.
(2) Next, a nickel plating sulfamate bath for bright plating is used as a plating bath, and a film thickness is obtained by an electroforming method (electroforming method) through a resist that covers a region where the opening 8 is to be formed. 1 to 100 μm (in this embodiment, 50 μm), a recess-forming nickel film 7 having a recess 5 corresponding to a printed figure is formed.
The nickel sulfamate bath for bright plating can be obtained by adding a brightener to the nickel sulfamate bath for matte plating.
In this way, by forming the recess-forming nickel film 7 by the bright plating method, the recess-forming nickel film 7 having a low surface roughness value of the contact surface (in this embodiment, the Ra value is 0.1 μm) is formed. .
[0025]
Next, a method for printing a paste (electrode paste) on the surface of a printing medium using the screen printing plate according to this embodiment will be described.
FIG. 3 is a cross-sectional view of an essential part for explaining a state in which the screen printing plate 1 according to this embodiment is used and the paste 10 is printed on the surface 9a of the printing medium 9 by a squeegee.
As shown in FIG. 3, when the paste 10 is printed on the surface 9a of the substrate 9 using the screen printing plate 1 of this embodiment, the paste 10 is injected into the recess 5 through the mesh holes 4, It is printed on the surface 9 a of the substrate 9 in a shape corresponding to the planar shape of the recess 5.
[0026]
In the screen printing plate 1 of this embodiment, the surface roughness (Ra value) of the contact surface 1 a is as small as 0.1 μm, and the contact surface 1 a of the screen printing plate 1 is in close contact with the surface 9 a of the printing medium 9. Therefore, the paste 10 in the concave portion 5 is suppressed and prevented from oozing out from the gap between the contact surface 1a of the screen printing plate 1 and the surface 9a of the substrate 9 to be printed.
As a result, it is possible to surely obtain a printed figure having a desired pattern shape with no oozing and excellent dimensional accuracy and shape accuracy.
[0027]
Further, since the surface roughness of the contact surface 1a of the screen printing plate 1 with the substrate 9 is low and smooth, even if the number of printing times (number of print shots) increases, the contact surface 1a is less worn and contacted. Since the surface state of the surface 1 is not easily changed, high-quality screen printing can be performed stably over a long period of time.
[0028]
The screen printing plate of the above embodiment has a two-layer plating film structure comprising a mesh region nickel film 6 formed by a matte plating method and a recess forming nickel film 7 formed by a gloss plating method. Therefore, it is possible to manufacture efficiently by a plating method without requiring a complicated manufacturing process.
[0029]
In addition, the screen printing plate has a two-layer structure composed of two types of plating films, a matte plating film (metal film for mesh region) and a bright plating film (metal film for forming recesses), thereby increasing the elongation of printed figures. It is possible to suppress and improve figure dimensional accuracy.
[0030]
In the above embodiment, the case where nickel is used as the constituent material of the screen printing plate has been described. However, in the present invention, the constituent material of the screen printing plate is not particularly limited, and other metal materials (for example, nickel) It is also possible to use a cobalt alloy).
In the above embodiment, the screen printing plate is formed from one type of material (nickel). However, depending on the case, the type of material may be different between the mesh region metal film and the recess forming metal film. Is also possible.
Further, the present invention has no special restrictions on the type of paste to be printed and the type of printing medium, and can be widely applied when printing various pastes on various printing media.
[0031]
In addition, the present invention is not limited to the above-described embodiment in other points as well, but is a specific value of the surface roughness of the contact surface with the substrate, a mesh region metal film, and a recess forming metal. Various applications and modifications can be made within the scope of the invention regarding the value of the film thickness, the relationship between the film thicknesses, the specific conditions of the method for producing the screen printing plate, and the like.
[0032]
【The invention's effect】
As described above, the screen printing plate of the present invention (Claim 1) comprises a screen printing plate having (a) a mesh region metal film for forming a mesh region and (b) a concave portion together with the mesh region metal film. The thickness of the mesh region metal film and the recess forming metal film is set to 1 to 100 μm, respectively, and the Ra value of the surface (contact surface) in contact with the substrate to be printed Is in the range of 0.01 to 0.30 μm, so that the bleeding of the paste is suppressed and prevented, and the wear of the contact surface due to repeated use of the screen printing plate is suppressed. Can be suppressed and prevented, and high-quality screen printing can be performed over a long period of time.
[0033]
In addition, because it has a structure comprising a metal film for mesh area formed by matte plating method and a metal film for recess formation formed by gloss plating method, plating is not required without complicated manufacturing processes. By this method, it is possible to efficiently form the mesh region metal film and the recess forming metal film, and it is possible to provide a low-cost screen printing plate.
In addition, the screen printing plate has a two-layer structure composed of two types of plating films, a matte plating film (metal film for mesh region) and a bright plating film (metal film for forming recesses), thereby increasing the elongation of printed figures. It can suppress and can improve figure dimensional accuracy.
[0034]
Further, in the method for producing a screen printing plate of the present invention (Claim 2), after forming a mesh region metal film by a matte plating method, a recess forming metal is formed on the mesh region metal film by a gloss plating method. Since the film is formed, the screen of the present invention has a low Ra value of 0.01 to 0.30 [mu] m on the contact surface with the printing body and little wear on the contact surface with the printing body. A printing plate can be produced efficiently.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a main part of a screen printing plate according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view showing a main part of a screen printing plate according to an embodiment of the present invention.
FIG. 3 is a cross-sectional view of an essential part showing a state in which a paste is printed on the surface of a printing medium using a screen printing plate according to an embodiment of the present invention.
FIG. 4 is a perspective view showing a main part of a conventional screen printing plate.
FIG. 5 is a cross-sectional view showing a main part of a conventional screen printing plate.
FIG. 6 is a cross-sectional view showing a state in which a paste is printed on the surface of a printing medium using a conventional screen printing plate.
[Explanation of symbols]
1 Screen printing plate 1a Contact surface of screen printing plate with substrate 2 Mesh hole formation area (mesh area)
3 Mesh hole non-formation area (non-mesh area)
4 mesh holes (through holes)
5 Recessed portion 6 Metal film for mesh region (nickel film for mesh region)
6a Opposite surface of the mesh region metal film to the printing medium (ceiling surface of the recess)
7 Metal film for forming recesses (nickel film for forming recesses)
8 Opening 9 Substrate 9a Surface of Print 10 Paste A Film thickness of nickel film for mesh region B Film thickness of nickel film for forming recess

Claims (2)

A mesh hole forming region (mesh region) in which a plurality of mesh holes through which the paste passes are formed;
A mesh hole non-formation area (non-mesh area) in which no mesh hole that allows the paste to pass is formed,
A screen printing plate comprising: a concave portion having a planar shape corresponding to a predetermined printed figure formed on a surface of the mesh region facing the substrate;
(a) a metal film in which the mesh region is formed (metal film for mesh region);
(b) provided with an opening having a shape corresponding to the recess, and joined to the mesh region metal film, the recess forming metal film constituting the recess together with the mesh region metal film,
The mesh region metal film and the recess forming metal film each have a thickness in the range of 1 to 100 μm,
The Ra value of the surface in contact with the substrate to be printed is in the range of 0.01 to 0.30 μm,
The screen printing plate, wherein the mesh region metal film is formed by a matte plating method, and the recess forming metal film is formed by a gloss plating method. A method for producing a screen printing plate according to claim 1, comprising:
A method for producing a screen printing plate, comprising: forming a metal film for a mesh region by a matte plating method, and then forming a metal film for forming a recess by the gloss plating method on the metal film for the mesh region.

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