TWM552116U - Screen printing plate - Google Patents

Abstract

To overcome insufficient material or non-uniform material issues in conventional printed patterns, a screen printing plate is provided. The screen printing plate has a frame, a printing textile coupled to the frame, a reference point disposed on the frame or the printing textile and configured to recognize a plurality of locations of the screen printing plate, and an imaging material disposed on the printing textile and having at least an opening.

Description

Web version

The present invention relates to a screen.

Figure 1 shows a photomicrograph of a conventional mesh and imaging material opening. As shown in FIG. 1, the mesh cloth is mostly woven by a polymer mesh or a metal mesh 9 or a mixture of the two, and the intersection of the transverse mesh and the longitudinal mesh is called a knot K10. In the screen making, firstly apply the patternable image forming material such as photoresist, emulsion, silicone, polymer photosensitive material, epoxy resin, UV glue, stainless steel metal foil, electroforming or electroplating to the mesh fixed to the frame. The formed metal foil is then provided with an image film having a pattern and an opening, and then the image forming film and the mesh cover are imaged (exposure, development, etching, etc.) to form a screen of the printable material. During the manufacture of a conventional screen, the opening of some narrow openings, as shown in Figure 1, will include the longitudinal mesh position on the mesh (and thus the mesh 10 on the mesh), resulting in The pattern obtained by printing has the problem of insufficient material or uneven material. The opening 12 is formed by the pattern of the image forming material 11 on the mesh cloth, that is, the portion of the mesh cloth on which the image forming material 11 is not formed is the mesh 9 which can expose the mesh cloth and the opening 12 of the partial mesh. Since the image forming material 11 can be seen through in the photomicrograph of Fig. 1, it is impossible to see that the mesh cloth is covered by the image forming material without allowing the printing material to pass. Figure 2 shows a stereomicrograph of a mesh and opening in a conventional screen. As can be more clearly seen in the stereomicrograph of Fig. 2, the mesh is partially covered by the image forming material 11 and is not covered, and the opening 12 is included, and the opening region containing the mesh 10 may cause passage therethrough. There are relatively few printed materials.

In order to overcome the above drawbacks of the prior art, the purpose of the present invention is to provide a screen to improve the adverse effects of the transverse screen and the longitudinal mesh on the printed pattern when the screen pattern is more and more precise. The screen of the present invention is particularly suitable for forming conductive lines obtained by electrically conductive lines on the surface of electronic products, such as printed conductive adhesive materials, and can maintain pattern stability when printing materials.

To achieve the above object, the present invention provides a screen comprising a frame, a mesh, a reference point, and an image forming material. The mesh is formed by interlacing a plurality of longitudinal meshes and a plurality of transverse meshes. The reference point is used to identify the relative position of the plurality of positions of the screen and the reference point. The imaging material is located on the mesh and has at least one opening.

According to an embodiment of the invention, the reference point is also used for alignment of the screen with an imaging film.

According to an embodiment of the present invention, the plurality of positions may be a plurality of mesh junctions at which the plurality of transverse meshes overlap the plurality of longitudinal meshes, a boundary of the at least one opening of the imaging material, the plurality of transverse meshes, or The plurality of longitudinal meshes.

According to an embodiment of the present invention, one side of the frame of the screen is perpendicular to the plurality of transverse meshes.

According to an embodiment of the present invention, the at least one opening of the image forming material comprises a wide opening and a narrow opening, and the wide opening is vertically connected to the narrow opening.

According to one embodiment of the present invention, the region of the narrow opening does not expose a mesh at either of the transverse meshes and any of the longitudinal meshes.

According to an embodiment of the present invention, the image forming material is a photoresist, an emulsion, a silicone, a polymer photosensitive material, an epoxy resin, a UV glue, a stainless steel metal foil, or an electroformed (plated) formed metal foil.

According to an embodiment of the invention, the mesh is a metal yarn, or a polymer yarn, or a combination of the two.

The technical solution of the present invention has the following advantages compared with the prior art:

1. Since the narrow opening area avoids all the net knots, the problem that the conventional net cloth is insufficiently printed and/or uneven due to the netting in the narrow opening is avoided.

2. Using the positioning concept relative to the reference point, it is easy to separate the position of the narrow opening from the meshing position, which is convenient for improving the yield of the screen printing and reducing the cost thereof.

3. It can precisely control the position of the wider opening and the narrow opening, increase the support force of the mesh, and greatly improve the life cycle of the screen.

6‧‧‧ net frame

7‧‧‧Mesh

8‧‧‧Initial Screen

9‧‧‧ mesh

10‧‧‧ network

11‧‧‧Image material

12‧‧‧ openings

13‧‧‧ benchmark

15‧‧‧ openings

16‧‧‧ openings

18‧‧‧Web Edition

23‧‧‧ corner points

Figure 1 shows a photomicrograph of a conventional mesh and imaging material opening.

Figure 2 shows a stereomicrograph of the mesh and conductive adhesive openings in a conventional screen.

Figure 3 shows a top view of the mesh and frame of the screen according to the present invention.

Figure 4 shows an enlarged top view of the mesh of Figure 3 in accordance with the present invention showing the portion of the mesh containing the reference points.

Figure 5 shows a top view of a portion of the initial screen and opening pattern of the present invention, which is also a top view of a portion of the mesh and opening pattern of the finished screen.

Figure 6 shows a finished screened screen according to the present invention.

The screen of the present invention and its manufacturing method will be further described below with reference to the accompanying drawings and preferred embodiments.

The screen according to the present invention is made by a method comprising the following steps 1-7:

1. Figure 3 shows a top view of the mesh and frame of the screen according to the present invention. Figure 4 shows an enlarged top view of the mesh of Figure 3 showing the portion of the mesh containing the reference points. In the step shown in FIG. 3, an initial screen 8 is provided, which comprises a mesh 7 and a frame 6. As shown in Fig. 4, the mesh is formed by interlacing a plurality of transverse meshes 9 and a plurality of longitudinal meshes 9, wherein the plurality of transverse meshes 9 are substantially parallel to each other and the plurality of longitudinal meshes 9 are substantially parallel to each other and transversely meshed 9 A good angle can be preferably sandwiched between the longitudinal webs 9. In addition, a transverse mesh and The intersection (overlap) between a longitudinal mesh is referred to as a mesh, and the smallest opening on the mesh surrounded by four adjacent meshes is referred to as a mesh. The smaller the size of the mesh, the more uniform the coating, but the size of the mesh should not be so small as to block the passage of printing materials such as conductive adhesives, dyes, and the like. The mesh cloth can be made of a polymer thread or a metal wire. One side of the frame 6 of the initial screen may be perpendicular to the one of the longitudinal web and the transverse web but parallel or non-parallel to the other. However, the present invention is not limited thereto, and the angle between the mesh and the frame may be a right angle or a non-right angle. The angle between the transverse mesh and the longitudinal mesh may also be a non-orthogonal angle.

2. Labeling and/or determining at least one reference point at the appropriate location of the initial screen in the step, utilizing the relative relationship between the reference point and other locations of the initial screen (eg, near and far, orientation) Etc.) Identify the complex important locations in the initial screen. For example, in an embodiment, the above-mentioned color is applied to a predetermined position on the stretched mesh, and the reference point for identifying the different positions is used as the reference point 13 shown in FIG. 3 and the reference point 13 shown in FIG. The reference point 13 serves as a reference point for the screen. For example, in another embodiment, the reference point 13 may be coated with an imaging material and an imaging process of exposure, development, and/or etching, etc., formed on the mesh of the initial screen, in this embodiment the reference point 13 will be The pattern of the image forming material is presented. For example, in another embodiment, the reference point may be formed on the mesh that has been completely coated with the image forming material but has not undergone an exposure process such as exposure, development, and/or etching (ie, the reference point is formed on the mesh cloth). On an image forming material that has been dried but has not undergone an imaging procedure such as exposure, development, and/or etching). For example, in still another embodiment, it may be decided to use the corner point 23 in the lower left corner of the frame as the reference point of the initial screen. It should be understood that the present invention is not limited to a single reference point, and multiple reference points may be determined to facilitate two-dimensional alignment of the horizontal direction and the vertical direction. If multiple reference points are determined in this step, multiple reference points are also applied to the imaged film in subsequent steps.

The steps of step 1 and step 2 may not be performed in the foregoing order. For example, the action of marking and/or determining at least one reference point in the appropriate position in step 2 may be performed before the mesh and the frame combination, so the initial screen provided in step 1 already includes the reference point and step 2 may Omitted.

3. In this step, the entire initial screen is captured. The appearance can be obtained by projector projection, visual scanning, or camera photo appearance.

4. Figure 5 shows a top view of a portion of the initial screen look and opening pattern in accordance with the present invention. In this step, the finished initial screen appearance is visually recognized, and the relative relationship between the plurality of important feature points such as the complex mesh, the complex knot (Knot) and the reference point 13 (such as distance, orientation, etc.) is determined. The feature points may be mesh knots, transverse meshes, longitudinal meshes, meshes, and the like. Then, as shown in FIG. 5, the plurality of important feature points on the appearance of the initial screen are used to determine the positions of the plurality of openings 15, 16 to be formed on the image forming film (and the final screen), such as the opening boundary, particularly the narrow opening 16. The opening boundary (the boundary between the opening 15 and the opening 16 is shown by a broken line in Fig. 5) so that the area of the narrow opening does not overlap with any of the meshes (i.e., as viewed from the top view of Fig. 5, the area of the narrow opening does not include any lateral direction A mesh at the intersection of the mesh and any of the longitudinal webs). In FIG. 5, a laterally extending wide rectangular opening 15 can be used to form a busbar electrode of a solar panel cell, and a longitudinally extending narrow rectangular opening 16 can be used to form a finger electrode of a solar panel cell, and the opening 15 is perpendicular to the opening 16 Configuration. It should be noted that "wide" and "narrow" are relative concepts intended to express the relative size of the opening 15 and the opening 16 without limiting the actual size of the opening 15 and the opening 16.

5. In this step, an imaging film having at least one reference point is provided, and the reference point 13 on the initial screen appearance is aligned with the reference point of the image forming film, and the reference point 13 and the plural number on the initial screen appearance are important. The relative relationship of the feature points and the plurality of openings 15, 16 is applied (projected or projected) onto the image forming film to write the pattern of the plurality of openings 15, 16 into the image forming film to produce a patterned imaging film having a pattern of the plurality of openings 15, 16. . “Applying” here refers to the complex point and pattern on the appearance of the initial screen (including the relationship between the reference point, the complex important feature points and the reference point such as distance and position, etc., the plural openings 15, 16 and the reference point. The relationship between the distance, such as distance and orientation, is projected onto the imaging film so that any position in the imaged film can find a unique corresponding position in the initial screen appearance. By "projection" as used herein is meant preferably orthogonal projection, meaning that each projection line is perpendicular to the plane of the initial screen appearance and also perpendicular to the plane of the imaging film. The term "projection" as used herein is not limited to projecting an appearance onto an image forming film with energy (laser or spot, etc.) or a solid material (such as a pigment, glue, etc.), which also includes softness that does not produce any appearance on the imaged film. Body data, appearance processing and calculations. The image forming film may be an image forming film obtained by adding a reference point to an existing image forming film or a specially customized image forming film having a reference point.

6. FIG. 5 shows a top view of a portion of the initial screen appearance and opening pattern in step 4. FIG. 5 also shows a top view of the mesh and image forming material opening pattern after exposure and development in this step. Figure 6 shows a finished screen 18 having a pattern according to the present invention. In an embodiment, if there is no fully coated dry image forming material on the mesh of the initial screen after the step 2 of marking and/or determining the reference point, then in this step (step 6), in the initial screen Forming an image forming material on the mesh and aligning the reference point of the image forming film with a reference point on which the initial screen of the image forming material is formed, and then performing an imaging process including exposure, development, and/or etching on the image forming material (if metal is used) The initial screen requires an etching process to form a patterned screen 18 as shown in FIG. In another embodiment, if a fully coated dry image forming material is left on the mesh of the initial screen after the step 2 of labeling and/or determining the reference point, the formation is omitted in this step (step 6). The action of the image forming material and aligning the reference point of the image forming film with the reference point of the initial screen plate on which the image forming material has been formed, and then performing an imaging process including exposure, development, and/or etching on the image forming material (if a metal initial net is used) The plate then requires an etching process to form a patterned screen 18 as shown in FIG. A partial enlarged view of this patterned screen is shown in FIG. The completed patterned screen comprises a frame 6, a mesh 7 fixed to the frame 6 and interlaced by a plurality of longitudinal meshes and a plurality of transverse meshes, and an image on the mesh 7 having at least one opening. The pattern of the material 11, wherein the at least one opening comprises at least one narrow opening 16 and at least one wide opening 15, the region of the narrow opening 16 not overlapping any of the nets 10. Since the position of the mesh 10 of the screen corresponds to the position of the knot 10 of the initial screen appearance, the position of the narrow opening 16 as shown in FIG. 5 (the border is shown by a broken line in FIG. 5) The position of the mesh 10 of the initial screen allows the area of the narrow opening 16 to not overlap any of the nets, while forming a patterned screen of the narrow opening 16 as shown in FIG. 5 without exposing the knot 10. The mesh cloth covered by the image forming material 11 (shown by hatching in FIG. 5) in FIG. 5 causes the printing material such as a conductive rubber material, a dye, or the like to pass through without being covered by the image forming material 11 (shown by hatching in the drawing). That is, the portion of the mesh exposed by the opening can pass the printed material, and the pattern of the printed material can be produced by the printing process (the pattern of the printed material and The opening pattern is the same). It should be noted that since the long side extension of the narrow opening 16 is parallel to the longitudinal mesh, the narrow opening 16 does not overlap the longitudinal mesh.

As shown in FIG. 6, the novel screen 18 having a pattern formed according to the above method has a frame 6, a mesh 7, a reference point 13, and a patterned image forming material 11. The mesh 7 is formed by interlacing a plurality of longitudinal meshes and a plurality of transverse meshes (not shown in Fig. 6, but the interlacing is as shown in Figs. 4 and 5). The reference point 13 can be used to identify the relative position of the complex position in the screen 18 to the reference point 13. Similar to the stereoscopic photomicrograph of the mesh and the image forming material in the conventional screen, the image forming material 11 is located on the mesh cloth 7 and has at least one opening (that is, having a pattern). As described in the above method, the reference point can also be used to align the screen with an imaging film. The plurality of positions of the screen may be a plurality of mesh junctions of the plurality of transverse meshes and the plurality of longitudinal meshes, a boundary of the at least one opening of the image forming material, a plurality of transverse meshes, and a plurality of longitudinal meshes. One side of the screen of the screen may be perpendicular to the plurality of transverse webs. The at least one opening of the image forming material may include a wide opening and a narrow opening, and the wide opening is vertically connected to the narrow opening. One of the key features of the novel screen is that the region of the narrow opening does not expose a mesh at either of the transverse webs and any of the longitudinal webs. The image forming material may be a photoresist, an emulsion, a silicone, a polymer photosensitive material, an epoxy resin, a UV adhesive, a stainless steel metal foil, or an electroformed (plated) formed metal foil. The mesh may be a metal yarn, a polymer yarn, or a combination of the two.

It should be understood that in the present screen, the reference point is determined/labeled in step 2, but the halftone pattern formed by the imaging procedure in step 6 may or may not include a reference point. That is, the opening pattern and the reference point of the screen may be formed at different time points as formed in steps 6 and 2, respectively, or formed at the same point in time as in step 6.

In some screen printing processes, multiple screens will be used to print different patterns. Alignment procedures are required between the screen and the screen. Therefore, the screen will contain alignment formed by imaging materials or other means. Alignment mark. It should be noted that the so-called "reference" used to identify the important positions of the plural The point is different from the aforementioned alignment mark. Moreover, the "reference point" of the present invention is used to identify different positions in the screen, and the alignment marks are used for alignment between different screens.

The description of the present invention is as above, but it is not intended to limit the scope of patent rights claimed by the present invention. The scope of patent protection is subject to the scope of the patent application and its equivalent fields. Any changes or modifications made by those skilled in the art without departing from the spirit or scope of this patent are subject to the equivalent changes or designs made in the spirit of the present disclosure and should be included in the scope of the patent application below. Inside.

9‧‧‧ mesh

10‧‧‧ network

13‧‧‧ benchmark

15‧‧‧ openings

16‧‧‧ openings

Claims (8)

A screen comprising: a mesh frame; a mesh cloth interlaced by a plurality of longitudinal meshes and a plurality of transverse meshes and coupled to the frame; a reference point located on the mesh or the frame for identifying the mesh a relative position of the plurality of screens to the reference point; and an image forming material positioned on the mesh and having at least one opening. The screen as described in claim 1, wherein the reference point is also used for alignment of the screen with an image forming film. The screen of claim 1, wherein the plurality of positions may be a plurality of meshes at which the plurality of transverse meshes overlap the plurality of longitudinal meshes, a boundary of the at least one opening of the image forming material, a plurality of transverse meshes, or a plurality of longitudinal meshes. A screen as claimed in claim 1, wherein one side of the frame of the screen is perpendicular to the plurality of transverse webs. The screen of claim 1, wherein the at least one opening of the image forming material comprises a wide opening and a narrow opening, and the wide opening is vertically connected to the narrow opening. The screen of claim 5, wherein the region of the narrow opening does not expose a mesh of any of the transverse meshes and any of the longitudinal meshes. The screen plate according to claim 1, wherein the image forming material is a photoresist, an emulsion, a silicone, a polymer photosensitive material, an epoxy resin, a UV glue, a stainless steel metal foil, or an electroformed (plated) formed metal foil. . The screen of claim 1, wherein the mesh is a metal yarn, or a polymer yarn, or a combination of the two.