TW201741148A - Printing screen patterns and methods of fabricating the same - Google Patents

Abstract

A method of fabricating a printing screen pattern includes: forming a polymer layer on a mesh having a warp-weft weave; forming a through hole in the polymer layer; and removing a part of the warp-weft weave of mesh to form a region having none of the warp-weft weave and connecting to the through hole. Accordingly, evenness of ink penetration affected by the warp-weft weave of mesh or the polymer residual adhered thereto can be prevented, and accuracy and quality of a printing pattern can be thus enhanced. The present application further provides a printing screen pattern.

Description

Screen pattern and manufacturing method thereof

The present invention relates to a printing screen and a method of manufacturing the same, and more particularly to a screen pattern and a method of manufacturing the same.

The screen printing system uses a doctor blade to press the ink through the through holes of the corresponding printing pattern on the screen to print the pattern on the printed matter. In addition to forming a printed pattern, the screen can also control the amount of ink that is transmitted during screen printing. The manufacturing method of the screen plate mainly comprises: making a mesh cloth with a mesh material such as a warp or weft-knitted polyester fiber, a nylon fiber or a metal wire; applying a certain tension to open and fix the mesh cloth. Forming a polymer coating on the mesh; and forming a through hole corresponding to the printed pattern on the polymer coating. The tension, thickness and structure of the mesh material, the thickness of the polymer coating, the resolution of exposure and development, etc. affect the accuracy, line width, thickness, flatness and yield of the screen printing.

Nowadays, screen printing has been widely used in the production of electronic circuits. As the size of electronic components is reduced, electronic circuits are required to have a large aspect ratio and stricter flatness. When it is required to print a line pattern with a large aspect ratio, the conventional technique is to increase the wire diameter of the net material or the thickness of the polymer coating, and the net material of the thick wire diameter is liable to cause ink overflow, and the printed circuit pattern is prone to occur. The disadvantage of unevenness and sharpness; and because the polymer material has a large viscosity value, it is difficult to control the thickness of the coating by coating a thick polymer material, resulting in the flatness of the screen is not uniform, thereby affecting the amount of ink or ink. the amount. Furthermore, if there is a barrier in the through hole of the screen pattern (for example, the latitude and longitude group of the mesh) Weaving, and the residual polymer attached to the warp and weft of the mesh, can easily lead to incomplete ink, or even ink, which affects the printing yield and quality.

Therefore, how to solve the above problems and provide a screen pattern that meets the requirements of today's electronic circuit production is the main purpose of developing the present invention.

In order to achieve the above object, the present invention provides a method for manufacturing a screen pattern, comprising: forming a polymer layer on a mesh having a warp and weft structure; forming a through hole in the polymer layer; and removing the mesh portion by the first laser The warp and weft structure forms a latitude-free tissue area that communicates through holes.

In one embodiment, the polymer layer is formed on the mesh by coating, laminating, or hot pressing.

In one embodiment, the mesh is embedded in the polymer layer.

In one embodiment, the portion of the polymer layer is removed by exposure development to form the through hole.

In one embodiment, the through hole is formed by the polymer layer of the second laser removing portion, and the power of the second laser is different from the power of the first laser.

In one embodiment, the width of the latitude-free tissue region is not greater than the width of the through hole.

In order to achieve the above object, the present invention provides a screen pattern comprising: a mesh cloth and a polymer layer. The mesh has a warp and weft structure, a first warp-free weave tissue area, and a second warp-free tissue area, wherein the width of the second warp-free tissue area is greater than the width of the first warp-free tissue area. The polymer layer is formed on the mesh and has a through hole communicating with the second warp-free tissue region.

In one embodiment, the width of the second warp-free tissue region is not greater than the width of the through hole.

In one embodiment, the mesh is embedded in the polymer layer, and the second The warp and weft tissue system is located within the above-mentioned through hole.

In one embodiment, the screen pattern of the present invention comprises an adhesive layer disposed between the mesh and the polymer layer.

In one embodiment, the through hole is connected to the first latitude-free tissue area.

In one embodiment, the polymer layer has a first through hole that communicates with the first latitude and longitude-free tissue region.

The invention utilizes laser to form a warp-free tissue region of the mesh, which communicates with the through hole of the polymer layer, and the screen pattern manufactured according to the manufacturing method of the invention can effectively avoid the barrier on the through-hole path of the screen pattern. The material affects the uniformity of the ink, thereby improving the precision and quality of the printed pattern to meet the needs of today's electronic circuits.

1,1', 2‧‧‧ screen pattern

10,20‧‧‧Mesh

11,11', 21‧‧‧ polymer layer

12‧‧‧Adhesive layer

101,201‧‧‧ Jingwei organization

111,111',211,212,213‧‧‧through holes

101a, 201a‧‧‧ warp

101b, 201b‧‧‧ weft

102,202‧‧‧The first latitude-free organization area

103,203‧‧‧Second no latitude and longitude organization area

W1‧‧‧Through hole width

W2‧‧‧The width of the first latitude-free tissue area

W3‧‧‧The width of the second latitude-free tissue area

1 is a schematic view showing a top view of a mesh according to a manufacturing method of the present invention; and FIG. 2A is a cross-sectional view showing a polymer layer formed on a mesh according to an embodiment of the manufacturing method of the present invention, and FIG. 2B is a schematic view According to another embodiment of the manufacturing method of the present invention, a cross-sectional view of the polymer layer formed on the mesh is formed; and FIG. 3A is a cross-sectional view showing the formation of the via hole in the polymer layer according to the embodiment shown in FIG. 2A. 3B is a cross-sectional view showing the through hole in the polymer layer according to the embodiment shown in FIG. 2B; and FIG. 4A is a cross-sectional view showing the latitude-free organization region forming the communicating through hole according to the embodiment shown in FIG. 3A. FIG. 4B is a cross-sectional view showing a woven-free tissue-free region forming a communication via according to the embodiment shown in FIG. 3B; FIG. 5 is a top view of the screen pattern according to an embodiment of the present invention; and FIG. According to another embodiment of the present invention, a screen pattern is shown above, FIG. 6B is a cross-sectional view of the I ₂ -I ₂ ' section in FIG. 6A, and FIG. 6C is a diagram of I ₃ -I ₃ ' in FIG. 6A. A schematic cross-sectional view.

The embodiments of the present invention are described in the following by means of specific embodiments, and those skilled in the art can readily understand the advantages and functions of the present invention from the disclosure. It is to be noted that, in order to clearly illustrate the main features of the present invention, the first figure only shows the relative relationship between the main elements in a schematic manner, and is not drawn according to the actual size, so the thickness, size and shape of the main elements in the figure. The arrangement, the configuration, and the like are for reference only, and are not intended to limit the scope of the invention.

Fig. 1 is a schematic view showing the upper side of a mesh cloth according to the manufacturing method of the present invention. As shown in Fig. 1, in the manufacturing method of the present invention, first, a mesh 10 having a warp and weft structure is fixed to a frame (not shown) by a certain tension, 101 in the warp and weft group of the mesh 10, and a warp 101a. A first warp-free tissue area 102 (ie, a mesh of the mesh 10) is formed between the weft 101b, and the material of the mesh may be selected from, but not limited to, metal wire, Tedron fiber, nylon fiber, fiberglass, or The above composite material. Next, the polymer layer is formed on the mesh 10, and the material forming the polymer layer may be selected from, but not limited to, polyethylene terephthalate (polyseter), polyethylene (PE), and polyimine (PI). ), polyvinyl chloride (PVC), polypropylene (PP), polytetrafluoroethylene (PTFE), polymethyl methacrylate (PMMA), polystyrene (PS), epoxy resin, or a combination thereof.

2A is a cross-sectional view showing a polymer layer formed on a mesh according to an embodiment of the manufacturing method of the present invention, and FIG. 2B is a view showing another embodiment of the manufacturing method according to the present invention, forming a polymer layer on a mesh A schematic cross-sectional view.

As shown in FIG. 2A, in the present embodiment, the mesh cloth 10 is a metal mesh cloth, and after applying the photocurable polymer solution to the mesh cloth 10, the solvent is heated and removed to form the polymer layer 11, and The mesh cloth 10 is embedded in the polymer layer 11. In other embodiments, the polymer film may be attached to the mesh cloth 10, and the polymer layer 11 may be formed by thermally pressing the mesh cloth 10 and the polymer film, and the mesh cloth 10 may be embedded in the polymer layer 11.

As shown in FIG. 2B, in the present embodiment, an adhesive is applied to the warp and weft structure 101 of the mesh 10 to form an adhesive layer 12, and the polymer layer 11' is attached to the adhesive layer 12, and the mesh 10 is bonded thereto. Polymer layer 11'.

Next, a via hole corresponding to the printed pattern is formed on the polymer layer. FIG. 3A is a cross-sectional view showing the formation of the via hole in the polymer layer according to the embodiment shown in FIG. 2A, and FIG. 3B is a cross-sectional view showing the via hole in the polymer layer according to the embodiment shown in FIG. 2B.

As shown in FIG. 3A, in the embodiment, the portion of the polymer layer 11 may be removed by laser or exposure development to form the through hole 111. At this time, the warp and weft structure 101 of the mesh 10 is stored in the through hole 111. .

As shown in FIG. 2B, in this embodiment, a portion of the polymer layer 11' may be removed by laser or exposure development to form a through hole 111'. At this time, the opening below the through hole 111' is located in the mesh 10. The warp and weft tissue 101.

Thereafter, a portion of the warp and weft structure of the mesh is removed by laser to form a second warp-free tissue region communicating with the through hole. 4A is a schematic cross-sectional view showing a latitude-free organization region forming a communication via hole according to the embodiment shown in FIG. 3A, and FIG. 4B is a wavy-free tissue region forming a communication via hole according to the embodiment shown in FIG. 3B. A schematic cross-sectional view.

As shown in Figs. 4A and 4B, a portion of the warp and weft structure 101 of the mesh 10 is removed by laser to form a second warp-free tissue region 103 communicating with the through holes 111, 111'. In the manufacturing method of the present invention, different lasers or different laser parameters may be selected according to the material types of the mesh and the polymer layer, respectively, for separately or continuously removing part of the polymer layers 111, 111' and the mesh 10 Part of the warp and weft structure 101, and forming through holes 111, 111' and second warp-free tissue area communicating with each other 103. The wavelength of the laser is, for example but not limited to, 315 to 400 nm, the power of the laser is for example but not limited to 3 to 15 W, the pulse of the laser is for example but not limited to 40 to 600 Hz, and the number of times of laser irradiation is for example but not limited to 10 to 35 Times.

Table 1 is the laser parameters of the specific embodiment

As shown in Table 1, the through-holes 111, 111' of the screen pattern of the non-blocking object can be formed by adjusting the parameters of the laser, for example, the through holes 111, 111' are formed first with a lower energy laser, and then the energy is higher. The laser forms a second warp-free tissue area 103, whereby the warp and weft structure 101 of the net cloth 10 or the polymer residue attached thereto can be prevented from affecting the uniformity of bleeding, thereby improving the precision and quality of the printed pattern.

In accordance with the above manufacturing method, the present invention provides a halftone pattern that meets the needs of today's electronic circuits.

Figure 5 is a top plan view of a screen pattern according to an embodiment of the present invention. As shown in FIG. 5, the screen pattern 1 (1') of the present invention comprises: a mesh cloth and a polymer layer 11 (11'), and the polymer layer (11') has a through hole 111 corresponding to the printing pattern (111). '). 4A and 4B are schematic cross-sectional views of the I ₁ -I ₁ ' section in Fig. 5.

Referring to FIGS. 4A and 4B, the polymer layer 11, 11' is formed on the mesh 10, and the mesh 10 has a warp and weft structure 101, a first warp-free tissue area 102, and a second warp-free tissue area 103, wherein the second The latitude-free tissue region 101 communicates with the through holes 111, 111' of the polymer layer 11, 11', and the width w3 of the second latitude-free tissue region 103 is greater than the width w2 of the first latitude-free tissue region 102. For the integrity and support of the sidewalls of the through holes 111, 111', perpendicular to the section of the surface of the screen 1,1', the width w3 of the second warp-free tissue region 103 is smaller than the width w1 of the through holes 111, 111', preferably, The width w3 of the second latitude-free tissue region 103 is flush with the width w1 of the through holes 111, 111'.

As shown in FIG. 4A, the mesh 10 is embedded in the polymer layer 11, and the second warp-free tissue region 103 is located in the through hole 111. As shown in FIG. 4B, the screen pattern 1 may further include an adhesive layer 12, and the mesh 10 and the polymer layer 11' are joined via an adhesive layer 12 disposed therebetween, and one opening (ink outlet) of the through hole 111 is Located on the second latitude and longitude tissue area 103.

The screen pattern of the present invention can retain the web warp and weft structure on a part of the through-hole path, taking into account the screen tension required for the printed electronic circuit, and the aspect ratio and layout of the electronic circuit. 6A is a top view of a screen pattern according to another embodiment of the present invention, FIG. 6B is a cross-sectional view of the I ₂ -I ₂ ' section in FIG. 6A, and FIG. 6C is a diagram of I _{3 in} FIG. 6A. Schematic diagram of the I ₃ 'section.

As shown in FIG. 6A, the halftone pattern 2 includes a mesh 20 and a polymer layer 21. The mesh 20 comprises a warp and weft tissue 201, a first warp-free tissue region 202 (i.e., a mesh of mesh 10), and a second warp-free tissue region 203, wherein the warp and weft tissue 201 comprises a warp 201a and a weft 201b. The polymer layer 21 has through holes 211, 212, 213 corresponding to the printed pattern.

Specifically, corresponding to a larger block in the electronic circuit (for example, an electrical pad) The aspect ratio of the printed pattern is lower, and the aspect ratio of the printed pattern corresponding to a smaller block (for example, a wire) in the electronic circuit is higher. Therefore, when the through hole 211 is formed and the warp and weft structure 201 of the mesh 20 is removed according to the manufacturing method of the present invention, a portion of the warp and weft structure 201 may be retained on the ink path of the same through hole 211, so that the through hole 211 is connected to the mesh. 202 of the first latitude-free zone and the second latitude-free organization zone 203, as shown in Figures 6A and 6B; or respectively forming a larger through-hole 212 connecting the first latitude-free woven tissue zone 202 and connecting the second latitude-free latitude and longitude The smaller through hole 213 of the tissue area 203 is as shown in Figs. 6A and 6B. By combining the through-holes 211, 212, 213 of different sizes with the through-holes 211, 212, 213, the first warp-free tissue area 202 and the second warp-free tissue area 203 of the mesh 20 can maintain the tension of the screen pattern 2 and can be printed. Electronic circuit with excellent resolution and aspect ratio.

In summary, the present invention utilizes a laser to form a warp-free tissue region of the mesh, which communicates with the through-hole of the polymer layer, and the mesh pattern produced by the manufacturing method of the present invention can effectively avoid the through-hole of the mesh pattern. The obstacles on the path affect the uniformity of the ink, thereby improving the accuracy and quality of the printed pattern, in line with the needs of today's electronic circuits.

The above-described embodiments are merely illustrative of the principles of the invention and its effects, and are not intended to limit the invention. Modifications and variations of the above-described embodiments can be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, all equivalent modifications and changes may be made without departing from the spirit and scope of the invention as disclosed in the appended claims.

2‧‧‧ Screen pattern

20‧‧‧Mesh

21‧‧‧ polymer layer

201‧‧‧ Jingwei organization

211‧‧‧through hole

201a‧‧‧ warp

201b‧‧‧Weft

202‧‧‧First latitude-free organization area

203‧‧‧Second no latitude and longitude organization area

Claims (12)

A method for manufacturing a screen pattern, comprising: forming a polymer layer on a mesh having a warp and weft structure; forming a through hole in the polymer layer; and removing a part of the warp and weft structure of the mesh by a first laser to form a communication The latitude-free organization area of the through hole. The method for producing a halftone pattern according to the first aspect of the invention, wherein the polymer layer is formed on the mesh by coating, laminating, or hot pressing. The method for producing a halftone pattern according to the first aspect of the invention, wherein the mesh is embedded in the polymer layer. The method for producing a halftone pattern according to the first aspect of the invention, wherein the portion of the polymer layer is removed by exposure development to form the through hole. The method for manufacturing a halftone pattern according to claim 1, wherein the polymer layer of the second laser removing portion forms the through hole, and the power of the second laser is different from the power of the first laser. . The method for manufacturing a screen pattern according to claim 1, wherein the width of the warp-free tissue region is not greater than the width of the through hole. A screen pattern comprising: a mesh having a warp and weft structure, a first warp-free tissue area, and a second warp-free tissue a region, wherein the width of the second warp-free tissue region is greater than a width of the first warp-free tissue region; and a polymer layer formed on the mesh having a through hole communicating with the second warp-free tissue region. The screen pattern of claim 7, wherein the width of the second warp-free tissue region is not greater than the width of the through hole. The screen pattern of claim 7, wherein the mesh is embedded in the polymer layer, and the second warp-free tissue region is located within the through hole. The screen pattern according to claim 7 of the patent application, comprising: an adhesive layer disposed between the mesh and the polymer layer. The screen pattern of claim 7, wherein the through hole is connected to the first warp-free tissue area. The screen pattern of claim 7, wherein the polymer layer has a first through hole connecting the first warp-free tissue region.