JP2015131427A - Screen printing plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a screen printing plate enabling print of more thin graphics.SOLUTION: The screen printing plate includes: a) a support layer on which printing graphic holes passing through a space between principal surfaces are formed; and b) a mesh layer which is joined to one of the principal surfaces of the support layer and in which trapezoidal-shape first and second mesh holes 42, 43 arranged in a line are adjacently formed in a print graphic region 30 superimposed on the print graphic holes when viewed from a direction perpendicular to the principal surfaces, along border lines 32, 33 in a longitudinal direction of the print graphic region 30 at intervals from one another. Mutually-parallel first and second sides 42a, 42b of the first mesh hole 42 extend so as to be oblique to the border line 33. Mutually-parallel fifth and sixth sides 43a, 43b of the second mesh hole 43 extend so as to be oblique to the boarder lines 33, and extend in a direction opposite to the first and second sides 42a, 42b.

Description

The present invention relates to a screen printing plate, and more particularly to a screen printing plate for printing a conductive pattern on an electronic component.
About.

  It is known that a screen printing plate used for printing a conductive pattern such as an electrode pad or wiring in a manufacturing process of an electronic component is manufactured using an electroforming technique. For example, a first layer corresponding to a mesh portion is formed by plating on a conductive substrate, and a second layer graphic portion corresponding to a printed figure is formed thereon by plating. Thereafter, the first layer and the second layer are The integrated plating sheet is peeled off from the substrate and attached to a printing frame to produce an all-metal screen printing plate. This all-metal screen printing plate has a higher degree of freedom in mesh design than a printing plate that uses a screen cage, and is superior in terms of desired printing quality, printing characteristics, and in-plate printing variation control. Since the mesh portion can be designed by freely selecting the shape / dimension, mesh line width, etc., it is optimal for obtaining a desired print quality.

  Various configurations have been proposed for the mesh portion of an all-metal screen printing plate.

  For example, Patent Document 1 discloses disposing rhomboid mesh holes and triangular mesh holes so that mesh lines intersect in a printed figure region. In this case, the number of arrangements can be selected by freely setting the angle of the mesh line intersection so that the shape and area of the opposing triangular mesh holes are equal.

  Further, in Patent Document 2, in order to perform good printing without blurring or rubbing on the outline of a printed figure, fine square mesh holes are arranged along the sides of the printed figure area, and the mesh holes are formed inside the honeycomb. It is disclosed to arrange in a shape.

Japanese Patent No. 4670487 JP 2013-107344 A

  In order to reduce costs by reducing the size of individual printed graphics and increasing the size of screen printing plates, it is necessary to have higher-precision controlled printing graphic quality and small in-plane variation. There is a need for a printing plate that is more controlled, such as the dimensional accuracy of the printed figure, the linearity of the printed figure (print blur control), and the coating thickness uniformity within the printed figure. In order to satisfy this requirement, an all-metal printing plate produced by using the electroforming technique is promising, and accordingly, mesh arrangement design is extremely important. Each mesh hole depends on the resist image formed by photolithography, but if this mesh hole is too small, it becomes difficult to stably form a resist image corresponding to the mesh hole in the process of producing a screen printing plate. In the process, there is a problem of clogging of the printing paste in the mesh holes. On the other hand, if the mesh hole is too large, it is not stable in terms of printing quality (bleeding, linearity, uniformity of coated surface), and there are many design issues regarding the shape / size and mesh line width of the mesh hole. Further, as the shape and arrangement of the mesh holes become more complicated, the drawing data of the corresponding original mask becomes more complicated and larger.

  In order to provide screen printing plates that satisfy requirements such as uniformity of coating thickness in printed figures, linearity of printed figures, and control of the amount of printing bleeding, finer meshes (higher meshing: thinner mesh lines, Smaller mesh holes and more mesh holes) are promising, but on the other hand, stable formation of mesh holes with photolitho technology becomes very difficult, and even when mesh holes are formed, clogging of the printing paste is difficult. Not all mesh holes arranged in the figure of the screen printing plate are necessarily necessary and effective for printing because problems occur. In other words, it is not always best to place smaller mesh holes, and the shape and size of the mesh holes may be appropriate depending on the shape of the printed figure (such as the edges or corners of the figure). It is necessary to arrange mesh holes with a certain thickness for printing quality (linearity, coating thickness uniformity, etc.).

  When the configuration disclosed in Patent Document 1 is applied to a finer figure (high mesh design specification), the area of the triangular mesh hole arranged along the side of the printed figure region becomes extremely small, and the all-metal screen printing is performed. In the photolithographic process, which is a plate manufacturing process, it is very difficult to stably form a resist mesh image. In addition, even if fine triangular mesh holes arranged along the sides of the printed figure area can be formed, the risk of paste clogging in the printing process is increased, and the configuration of the mesh portion disclosed in Patent Document 1 is applied. Has its limits.

  In the configuration of Patent Document 2, data creation for mesh master production is extremely complicated. In addition, the square mesh holes arranged along the sides of the printed figure area are required to be arranged in large numbers with extremely small dimensions in order to have excellent edge linearity in printing. It is difficult to stably form a resist image corresponding to each square mesh hole. Since there is a limit to reducing the size of the square mesh holes arranged along the sides of the printed figure area, when forming a thinner printed figure, there is no area to place other than the square mesh holes inside the printed figure area, etc. Even in the configuration of Patent Document 2, there is a limit to adapt to a thin line figure.

  In view of such circumstances, the present invention intends to provide a screen printing plate capable of printing a thinner figure.

  In order to solve the above problems, the present invention provides a screen printing plate configured as follows.

  The screen printing plate includes a support layer and a mesh layer. The support layer is formed with printed graphic holes penetrating between the main surfaces. The mesh layer is bonded to one of the main surfaces of the support layer, and extends in a longitudinal direction of the printed graphic region in a printed graphic region overlapping the printed graphic hole when viewed from a direction perpendicular to the main surface. And at least two first mesh holes arranged in a row at intervals along one of the existing boundary lines and at least one second mesh hole arranged along the other of the boundary lines. Is formed. When viewed from a direction perpendicular to the main surface, (a) the first mesh hole has a trapezoidal shape having first to fourth sides, and the first and second sides are parallel to each other and the boundary The first side is longer than the second side, and the third side on the one side of the boundary line is the boundary among the third and fourth sides. Extending along the one side of the line, the fourth side on the other side of the boundary line out of the third and fourth sides extending obliquely with respect to the boundary line, (b) The second mesh hole has a trapezoidal shape having fifth to eighth sides, the fifth and sixth sides are parallel to each other, and the fifth side is longer than the sixth side, The fifth side is adjacent to the fourth side of the first mesh hole of one of the two adjacent first mesh holes, and the seventh and The seventh side on the other side of the boundary line extends along the other side of the boundary line, and the one side of the boundary line among the seventh and eighth sides. The eighth side is adjacent to the first side of the other one of the two adjacent first mesh holes.

  In the above configuration, a printed figure is formed corresponding to the printed figure hole. In the mesh layer, the printed graphic region is formed in a mesh shape by the first and second mesh holes. Since the mesh line extends obliquely with respect to the boundary line in the longitudinal direction of the printed figure region, the linearity of the edge of the printed figure can be increased. Further, since the mesh lines intersect in a T shape, the print paste can be filled more evenly in the printed figure holes than in the case of intersecting in the X shape, so that the print quality is improved. Furthermore, by arranging the first and second mesh holes obliquely in the printed graphic region having a constant width, the first and second mesh holes can be arranged more than in the case where the first and second mesh holes are not inclined. 2 mesh holes can be made larger. Therefore, even if the width of the printed graphic area is reduced, good printing is possible. That is, it is possible to print a thinner figure.

  The first mesh hole may include a different size. Further, the second mesh holes may include those having different sizes. Further, the first and second sides may not be parallel to the eighth side, or the fifth and sixth sides may not be parallel to the fourth side.

  Preferably, all of the first mesh holes have the same size and shape. All of the second mesh holes have the same size and shape. In the first and second mesh holes in which the first side and the eighth side are adjacent to each other, the fourth side and the sixth side are aligned on the same straight line. In the first and second mesh holes in which the fourth side and the fifth side are adjacent to each other, the second side and the eighth side are arranged on another same straight line.

  In this case, the mesh line width can be made constant.

  Preferably, a plurality of the printed figure holes having the same size and shape are arranged in parallel to each other. A direction of an angle formed by the first and second mesh holes formed in the printed graphic region overlapping the first set of printed graphic holes including one or more of the printed graphic holes; and The direction of the angle formed by the first and second mesh holes formed in the printed graphic region overlapping the second set of printed graphic holes including one or more of the printed graphic holes different from the printed graphic hole And the opposite direction.

  In this case, non-uniform displacement of the printed figure can be prevented as compared with the case where the first and second mesh holes are arranged obliquely with respect to the boundary line in the longitudinal direction in all printed figure regions. , Can extend the plate life.

  When the screen printing plate of the present invention is used, it is possible to print a thinner figure.

It is a principal part top view of a mesh layer. Example 1 It is explanatory drawing which shows the example of a design of a mesh hole. Example 1 It is sectional drawing which shows the manufacturing process of a printing sheet typically. Example 1 It is sectional drawing which shows the manufacturing process of a printing sheet typically. Example 1 It is a principal part top view which shows a mesh layer typically. (Comparative Examples 1-4) It is a principal part top view which shows a mesh layer typically. (Comparative Examples 5 to 8)

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  <Example 1> The screen printing plate of Example 1 will be described with reference to FIGS.

  The screen printing plate is obtained by sticking and fixing the printing sheet 11 shown in the cross-sectional view of FIG. 4 (7) to a printing frame via a support rod screen or directly. As shown in FIG. 4 (7), in the printing sheet 11, the mesh layer 12 is bonded to one main surface of the support layer 14. The support layer 14 is formed with printed graphic holes 15 penetrating between the main surfaces of the support layer 14. In the mesh layer 12, mesh holes 13 penetrating between the main surfaces of the mesh layer 12 are formed.

  FIG. 1 is a plan view of a main part of the mesh layer. As shown in FIG. 1, the mesh layer includes first to fourth mesh holes 42 to 45 in a printed graphic region 30 that overlaps the printed graphic hole when viewed from the direction perpendicular to the joint surface between the support layer and the mesh layer. Is formed.

  The first mesh holes 42 are arranged in a line along one boundary line 32 in a state where the first mesh holes 42 are obliquely inclined with respect to one boundary line 32 in the longitudinal direction of the printed graphic region 30. The second mesh holes 43 are arranged in a line along the other boundary line 33 in a state where the second mesh holes 43 are inclined with respect to the other boundary line 33 in the longitudinal direction of the printed graphic region 30. The third and fourth mesh holes 44 and 45 are arranged along boundary lines 34 and 35 at both ends in the longitudinal direction of the printed graphic region 30.

  The first mesh hole 42 has a trapezoidal shape having first to fourth sides 42a to 42d. The first side 42 a and the second side 42 b are parallel to each other and extend obliquely with respect to the boundary lines 32 and 33 in the longitudinal direction of the printed graphic region 30. The first side 42a is longer than the second side 42b. The third side 42c is disposed on the one boundary line 32 side, and the fourth side 42d is disposed on the other boundary line 33 side. The third side 42 c extends along one boundary line 33. The fourth side 42 d extends obliquely with respect to the boundary lines 32 and 33.

  The second mesh hole 43 has a trapezoidal shape having fifth to eighth sides 43a to 43d. The fifth side 43a and the sixth side 43b are parallel to each other. The fifth side 43a is longer than the sixth side 43b. The fifth side 43 a is adjacent to the fourth side 42 d of one first mesh hole 42 out of the two first mesh holes 42 adjacent to the second mesh hole 43. The seventh side 43c is disposed on the other boundary line 33 side, and the eighth side 43d is disposed on the one boundary line 32 side. The seventh side 43 c extends along the other boundary line 33. The eighth side 43 d is adjacent to the first side 42 a of the other first mesh hole 42 out of the two first mesh holes 42 adjacent to the second mesh hole 43.

  Of the first side 42a of the first mesh hole 42, the portion 42s other than the portion facing the second side 42b adjacent to the first side 42a and the fourth side 42d are arranged in a zigzag manner. Yes. Of the fifth side 43a of the second mesh hole 43, the portion 43s other than the portion facing the sixth side 43b adjacent to the fifth side 43a and the eighth side 43d are arranged in a zigzag manner. Yes. The first and second mesh holes 42, 43 are arranged so that these zigzags are engaged with each other with a space therebetween, and extend in a zigzag between the first mesh hole 42 and the second mesh hole 43. A mesh line is formed.

  In particular, all of the first mesh holes 42 have the same size and shape, all of the second mesh holes 43 have the same size and shape, and (a) the first side 42a and the eighth side 43d are adjacent to each other. In the first and second mesh holes 42 and 43, the fourth side 42d and the sixth side 43b are arranged on the same straight line, and (b) the fourth side 42d and the fifth side 43a are mutually connected. In the adjacent first and second mesh holes 42 and 43, the second side 42b and the eighth side 43d may be arranged on another same straight line. In this case, 46 between the first side 42a and the second side 42b adjacent to each other, 47 between the fifth side 43a and the sixth side 43b adjacent to each other, and the fourth side adjacent to each other. A mesh line having a constant width is formed between the first side 42a and the eighth side 43d 49 adjacent to each other 48 between the second side 42d and the fifth side 43a.

  A third mesh hole 44 is arranged between one boundary line 34 in the short direction of the printed figure region 30 and the second mesh hole 43, and the other boundary line 35 and the second mesh hole 43 are arranged. A fourth mesh hole 45 is disposed between the two. The shapes of the third mesh hole 44 and the fourth mesh hole 45 are obtained by dividing the second mesh hole 43 into two parts. Specifically, the third mesh hole 44 is a pentagon, and the fourth mesh hole 45 is a triangle. Although the seven first mesh holes 42 and the six second mesh holes 43 are formed in the mesh layer 12 of the present embodiment, the present invention is not limited to this form. As a minimum unit of the present invention, it is sufficient that at least two first mesh holes 42 and at least one second mesh hole 43 are formed.

  FIG. 2 is an explanatory diagram showing a design example of the first and second mesh holes. As shown in FIG. 2, the first and second rectangular figures 72 and 73 having the same size and shape are inclined 45 ° in the opposite direction with respect to the boundary line in the longitudinal direction of the printed figure area (left and right direction in FIG. 2). The first and second rectangular figures 72 and 73 are cut at boundary lines 82 to 85 that are slightly smaller than the printed figure area, and the inner portions of the boundary lines 82 to 85 are mesh hole shapes. And

  As shown in FIG. 1, when the mesh line extends obliquely with respect to the boundary line in the longitudinal direction of the printed figure region, the linearity of the outline of the printed figure can be increased. In addition, since the mesh lines intersect in a T shape, the print paste can be more reliably filled in the printed pattern hole than in the case of intersecting in the X shape, so that the print quality is improved. Further, by arranging the first and second mesh holes so as to be in mesh with each other in the printed graphic region, the first and second mesh holes can be obtained as compared with the case where the first and second mesh holes are not inclined. The holes can be made larger. Therefore, even if the width of the printed graphic area is reduced, good printing is possible. Therefore, it is possible to print a thinner figure.

  In addition, for example, when a plurality of electronic component conductive patterns are printed using a screen printing plate, printed pattern holes having the same size and shape are arranged in a grid pattern in parallel with each other on the printing sheet. In this case, if the directions in which the first and second mesh holes are obliquely arranged with respect to the boundary line in the longitudinal direction of the printed figure region are all the same, the printing sheet is easily deformed in a specific direction. In some cases, the positions of the graphic shapes may be unevenly distributed, or stress may be concentrated on a specific location to shorten the plate life. Therefore, it is preferable that the directions in which the first and second mesh holes are obliquely arranged differ from the longitudinal boundary line of the printed figure region.

  That is, when a plurality of printed graphic holes having the same size and shape are arranged in parallel to each other, the first printed graphic area formed in the printed graphic region overlapping the first set of printed graphic holes including one or more printed graphic holes. The direction of the angle formed by the first and second mesh holes and the printed graphic area that overlaps with the second set of printed graphic holes including one or more printed graphic holes different from the first set of printed graphic holes. The direction of the angle formed by the first and second mesh holes is reversed. For example, for a part (for example, half) of the graphic forming area, the first and second mesh holes are formed in a shape inverted in the longitudinal direction of the printed graphic area. As a result, non-uniform misalignment of the printed figure can be prevented, and the plate life can be extended.

  Next, the manufacturing method of the printing sheet used for a screen printing plate is demonstrated, referring FIG.3 and FIG.4. 3 and 4 are cross-sectional views schematically showing the manufacturing process of the printing sheet 11.

  (1) First, as shown in FIG. 3A, a conductive substrate 50 having a reference surface 50a having a predetermined surface roughness is prepared. For example, a series of surface treatments such as alkali degreasing, water washing, acid treatment, water washing, and drying are performed on stainless steels SUS430 and SUS304 having a surface roughness Ra of 0.01 μm to 1 μm. The surface treatment is extremely important for the stable formation of a fine resist image, and is also important in terms of the quality of the plating film and the adhesion between the substrate and the plating film when electrolytic plating is performed.

  (2) Next, as shown in FIG. 3 (2), a photosensitive resist film for forming mesh holes 13 in the mesh layer 12 on the reference surface 50a of the substrate 50 that has been subjected to degreasing cleaning and surface treatment by acid treatment. 52 is formed. The photosensitive resist film 52 may be formed by bonding a dry film photosensitive resist to the reference surface 50a of the substrate 50 with a laminator, or by applying a liquid photosensitive resist to the reference surface 50a of the substrate 50 with a spin coater. Good.

  When the thickness of the photosensitive resist is lower than the mesh thickness when the mesh portion of the mesh layer 12 is grown by electrolytic plating, the opening portion of the mesh hole becomes an overhang shape, and the opening size accuracy of the mesh hole cannot be guaranteed. In order to prevent this, the thickness of the photosensitive resist film 52 is set to a thickness larger than the mesh portion thickness (that is, the thickness of the mesh layer 12). The film thickness range of the photosensitive resist film 52 is about 10 μm to 50 μm, and the combination is selected such that the thickness of the photosensitive resist film 52 is about +2 to +10 μm thicker than the thickness of the mesh portion to be plated (the thickness of the mesh layer 12). To do.

  (3) Next, as shown in FIG. 3 (3), exposure is performed using an original mask 60 as indicated by an arrow 62. On the original mask 60, a mesh figure 63 for forming the mesh hole 13 is drawn. Here, since a negative photosensitive resist is used for the photosensitive resist film 52, in the original mask 60, the figure forming the resist pattern is a transparent figure. When a positive type photosensitive resist is used for the photosensitive resist film 52, the figure forming the resist pattern is an opaque figure.

  In the photosensitive resist film 52, the portion corresponding to the transparent portion of the pattern drawn on the original mask 60 is photocured and a resist image corresponding to the mesh hole is formed. The shape, size, and arrangement number of the transparent portions of the pattern drawn on the original mask 60 are selected so as to satisfy desired printing characteristics (shape, dimensions, coating thickness, uniformity, edge linearity, etc.).

  The mesh aperture ratio (the total area of mesh holes in one printed graphic area / the area of one printed graphic area) and the number of mesh holes have an influence on the print quality (print bleeding, uniformity of paste application surface). Therefore, a smaller mesh hole, thinner wire diameter, and more mesh holes are desired. However, in practice, clogging of the paste and difficulty in forming a resist image corresponding to a mesh hole as a screen plate Therefore, there is a trade-off relationship.

  However, in the case of the mesh arrangement shown in FIG. 1, the printing quality, paste clogging risk, and resist image formability in screen plate production are all excellent, and data design in the production of the original plate is simple and versatile. It has a mesh arrangement with. The mesh hole size is about 10 μm to 100 μm, and the mesh wire diameter is about 10 μm to 50 μm for good print quality.

  (4) Next, the exposed photosensitive resist film 52 is developed. As a result, a resist image 53 corresponding to the mesh figure 63 is formed on the reference surface 50 a of the substrate 50 as shown in FIG.

  (5) Next, with the resist image 53 formed on the reference surface 50a of the substrate 50, electrolytic plating is applied to the substrate 50, and a mesh is formed on the reference surface 50a of the substrate 50 as shown in FIG. Layer 12 is formed. For example, as the electrolytic plating bath, a sulfamic acid Ni bath excellent in stress control of the plating film is used and formed by electrolytic Ni plating. The internal stress of the foil in the sulfamic acid plating bath is controlled to the tension side by the addition of a stress modifier (halogen Ni, brightener), and the plating thickness forming the mesh part is proportional to the amount of electroplating electricity (current value x conduction time) Since there is a relationship, thickness control is performed by setting a plating electric quantity corresponding to a desired plating thickness.

  The thickness of the mesh layer 12 varies depending on the viscosity of the printing paste to be used and the desired printing quality (printing coating thickness, suppression of bleeding), but in the range of about 5 μm to 50 μm including the relationship with the mesh opening ratio. Set.

  (6) Next, after the electroplating of the mesh layer 12 is completed, the resist image 53 is peeled and removed as shown in FIG. The resist image 53 is peeled and removed by completely dissolving and removing the resist image 53 by shower spraying or immersing an alkali solution or an organic solvent-containing solution, and then washing and removing the alkali residue on the surface by a subsequent water washing treatment. At this point, the process of forming the mesh holes 13 in the mesh layer 12 is finished.

  (7) Next, the same steps as in the above (2) to (6) are repeated, and the support layer 14 having the printed pattern holes 15 is formed on the mesh layer 12. In the original exposure process of the support layer 14, care is taken to ensure consistency with the mesh portion of the first layer 14, and the mesh holes 13 of the mesh layer 12 and the printed pattern holes 15 of the support layer 14 are integrated with good alignment. The formed all-metal printing sheet 11 is formed.

  Note that FIG. 4 (6) shows a state in which the electroplating of the mesh layer 12 is completed and the resist image 53 is peeled off. However, the resist image 53 is not peeled and removed, and a part of the resist image 53 having a shape protruding from the upper surface of the mesh layer 12 is scraped off by a polishing method so that the surface of the mesh layer 12 and the height of the resist image surface are made uniform. Thus, the support layer 14 may be formed on the mesh layer 12.

  Next, the printed sheet 11 is cut into a predetermined outer peripheral size together with the substrate 50 and attached to a screen support rod having a combination structure, or directly attached to a print frame frame without using a support rod, and then the substrate 50 is removed. A screen printing plate is completed.

  <Modification> The first mesh hole 42 may include ones having different sizes. Further, the second mesh hole 43 may include those having different sizes. Further, the first and second sides 42a and 42b may not be parallel to the eighth side 43d, or the fifth and sixth sides 43a and 43b may not be parallel to the fourth side 42d.

  <Comparative Examples 1-8> Next, screen printing plates of Comparative Examples 1-8 will be described with reference to FIGS. 5 and 6 are main part plan views schematically showing the mesh layer of the screen printing plate. The black rectangular portion is a printed figure region, and the outline of the mesh hole is indicated by a white line.

  FIG. 5 (1) is a comparative example 1 in which square mesh holes are uniformly arranged in the printed graphic area, and FIG. 5 (2) is a comparative example 2 in which round mesh holes are uniformly arranged in the printed graphic area. Reference numeral 5 (3) shows a comparative example 3 in which parallelogram mesh holes are uniformly arranged in the printed figure region. Since the shape and size of each mesh hole are constant, these can stably form the mesh hole. However, if the printed figure is made thin, a problem arises in the print quality (linearity, coating thickness uniformity), and the outline of the printed figure bends like a dumpling skewer.

  FIG. 5 (4) shows a comparative example 4 in which parallelogram mesh holes are arranged more finely than in FIG. 5 (3) in the printed figure region. In this case, by arranging a large number of fine mesh holes, the printing quality is improved, but it becomes difficult to form the mesh holes, and it is very difficult to stably form a resist image for the mesh holes. In addition, when mesh stencils tilted in one direction are arranged on the entire surface of the plate, there is a problem in that the graphic arrangement displacement occurs in the oblique arrangement direction, and the print effective area does not form a rectangle.

  FIG. 6 (5) shows a comparative example 5 in which triangular mesh holes having the same area are arranged along the opposing longitudinal boundary lines of the printed graphic region so that the mesh lines cross obliquely. Comparative Example 5 conforms to the design concept of Patent Document 1. FIG. 6 (6) shows a comparative example 6 in which a rectangular mesh hole is arranged along a boundary line in the longitudinal direction of the printed graphic region with priority given to the print quality. Comparative Example 6 conforms to the design concept of Patent Document 2. 6 (5) and 6 (6) are mesh hole arrangements that give priority to print quality, but if the mesh holes are made smaller as the printed figure becomes thinner, the triangular fragment shape placed at the end of the figure However, the production limit is generated in the rectangular mesh holes, and as a result, the required printing quality such as printing linearity cannot be satisfied. If the mesh hole is too small, a problem of paste clogging also occurs, and as a result, the print quality requirement cannot be satisfied.

  FIG. 6 (7) shows a comparative example 7 in which hexagonal mesh holes are arranged in a honeycomb shape. The mesh holes formed along the opposing longitudinal boundary lines of the printed figure region are set to have the same area. FIG. 6 (8) shows a comparative example 8 in which rectangular mesh holes are arranged in a staggered manner so as to pile bricks. In FIGS. 6 (7) and 6 (8), there is a trade-off relationship between improvement in printing quality due to fine mesh holes and stable formation of mesh holes.

  Comparing Example 1 and Comparative Examples 1 to 8, when printing a thin line figure having the same line width, in Example 1, the first and second meshes arranged along the longitudinal boundary line of the printed figure area The area of a hole can be made larger than the mesh hole of Comparative Examples 1-8 shown in FIG.6 and FIG.7. Therefore, Example 1 can print a thinner figure.

  <Summary> As described above, the first mesh holes arranged obliquely along one boundary line in the longitudinal direction of the printed figure region and the first mesh holes arranged in a row along the other boundary line. The screen printing plate in which the second mesh holes arranged in a row in a state inclined obliquely in the opposite direction to the first mesh can print a thinner figure.

  The present invention is not limited to the above embodiment, and can be implemented with various modifications.

DESCRIPTION OF SYMBOLS 11 Print sheet 12 Mesh layer 13 Mesh hole 14 Support layer 15 Print figure hole 30 Print figure area 32, 33, 34, 35 Boundary line 42 1st mesh hole 42a 1st edge | side 42b 2nd edge | side 42c 3rd edge | side 42d 4th side 43 1st mesh hole 43a 5th side 43b 6th side 43c 7th side 43d 8th side 44 3rd mesh hole 45 4th mesh hole

Claims (3)

A support layer in which printed figure holes penetrating between main surfaces are formed;
Bonded to one of the main surfaces of the support layer, and viewed from a direction perpendicular to the main surface, a boundary line extending in the longitudinal direction of the printed graphic region in the printed graphic region overlapping the printed graphic hole A mesh layer formed with at least two first mesh holes arranged in a row at intervals along one side and at least one second mesh hole arranged along the other of the boundary lines When,
With
When viewed from a direction perpendicular to the main surface,
The first mesh hole has a trapezoidal shape having first to fourth sides, and the first and second sides are parallel to each other and extend obliquely with respect to the boundary line. The side is longer than the second side, and the third side on the one side of the boundary line of the third and fourth sides extends along the one side of the boundary line, and the third side And the fourth side on the other side of the boundary line of the fourth side extends obliquely with respect to the boundary line,
The second mesh hole has a trapezoidal shape having fifth to eighth sides, the fifth and sixth sides are parallel to each other, and the fifth side is longer than the sixth side, The fifth side is adjacent to the fourth side of the first mesh hole of one of the two adjacent first mesh holes, and the boundary line of the seventh and eighth sides. The seventh side on the other side extends along the other side of the boundary line, and the eighth side on the one side of the boundary line is adjacent to the second side among the seventh and eighth sides. A screen printing plate, wherein one of the first mesh holes is adjacent to the first side of the other first mesh hole. All of the first mesh holes have the same size and shape,
The second mesh holes are all the same size and shape,
In the first and second mesh holes in which the first side and the eighth side are adjacent to each other, the fourth side and the sixth side are aligned on the same straight line,
In the first and second mesh holes in which the fourth side and the fifth side are adjacent to each other, the second side and the eighth side are arranged on another same straight line. The screen printing plate according to claim 1. A plurality of the printed figure holes having the same size and shape are arranged in parallel to each other,
The direction of the angle formed by the first and second mesh holes formed in the printed graphic area overlapping the first set of printed graphic holes including one or more of the printed graphic holes;
The first and second mesh holes formed in the printed graphic region overlapping the second set of printed graphic holes including one or more of the printed graphic holes different from the first set of printed graphic holes. The screen printing plate according to claim 1, wherein the direction of the angle formed by the screen is opposite.