CN214111890U

CN214111890U - Printing screen with protective film structure

Info

Publication number: CN214111890U
Application number: CN202022901728.5U
Authority: CN
Inventors: 周刚; 陈厚; 潘国虎; 汪洋
Original assignee: Jiangsu Shengxi Electronic Technology Co ltd
Current assignee: Jiangsu Shengxi Electronic Technology Co ltd
Priority date: 2020-12-07
Filing date: 2020-12-07
Publication date: 2021-09-03
Anticipated expiration: 2030-12-07

Abstract

The utility model discloses a printing half tone with protective film structure, including screen frame and wire mesh, wire mesh stretches tight on locating the screen frame through stretch-draw silk screen, and pattern printing district and non-pattern printing district are divided into by printing district boundary line to mutual lapped wire mesh and stretch-draw silk screen, wire mesh's downside is pasted and is had the polymer pad pasting layer, and the non-pattern printing district cladding in polymer pad pasting layer bottom side has the sensitization to protect the rete, and this sensitization protects the rete and sets up at a distance from printing district boundary line. The film width C of the photosensitive film protecting layer, the distance d between the inner end of the photosensitive film protecting layer and the boundary line of the printing area, the distance b from the boundary line of the printing area to the outer edge of the printing silicon wafer) and the distance a from the outer end of the polymer film pasting layer to the boundary line of the printing area; a is greater than or equal to C + d, and b is greater than d. The photosensitive film protecting layer covers the outer end part of the printing silicon chip. The printing screen can avoid direct friction damage of sharp edges of printing substrates and a high polymer material film, and is simple in structure and convenient to manufacture.

Description

Printing screen with protective film structure

Technical Field

The utility model relates to a printing half tone especially relates to a printing half tone including macromolecular material pad pasting and can avoid printing substrate to the direct wearing and tearing of pad pasting layer.

Background

The screen printing plate is an important tool for screen printing, and the structure of the printing screen printing plate directly influences the service life and the printing precision of the screen printing plate. The screen printing plate mainly comprises a metal screen mesh which is made of metal and is woven by warps and wefts in a crossed manner and a screen frame for stretching the metal screen mesh, wherein the metal screen mesh is stretched and fixed on the screen frame by a polyester stretching screen mesh at a certain tension; in the non-photosensitive high polymer material film-pasting screen printing plate, a high polymer film pasting layer with printing patterns is pasted on the printing surface of a metal screen.

The silk-screen printing is also widely applied to the printing manufacturing process of solar cell silicon wafers; during printing, a substrate such as a crystalline silicon battery piece is directly arranged below the high polymer material film, and slurry on the silk screen passes through the meshes of the silk screen and the high polymer film printing pattern wire grooves under the extrusion of the scraper and is printed on the battery piece substrate to form a grid line circuit.

Along with the application of polymer pad pasting material and the optimization of half tone structure, the printing number of times of half tone has reached traditional half tone more than 2.5-5 times, life has mostly reached more than 10 ten thousand times, the crystalline silicon battery piece edge that has higher sharpness in this kind of high-frequency printing process can produce very big friction damage to the corresponding region of polymer pad pasting certainly, form the printing thick liquids seepage even, not only directly influence the printing precision of battery piece grid line, make the printing yield descend, and also can cause the waste of thick liquids, increase the printing cost.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a printing half tone with protective film structure is provided, can not only avoid the sharp limit of printing substrate and the direct friction damage of macromolecular material pad pasting, simple structure, preparation convenience moreover.

In order to solve the technical problem, the utility model discloses a printing half tone with protective film structure, including screen frame and wire mesh, wire mesh stretches tight on locating the screen frame through stretch-draw screen, and wire mesh and stretch-draw screen pass through the mutual overlap joint of adhesive layer, and pattern printing district and non-pattern printing district are divided into by printing district boundary line to mutual overlap joint wire mesh and stretch-draw screen, and non-pattern printing district is the font of returning region, and this non-pattern printing district surrounds in the periphery of pattern printing district, wire mesh's downside is pasted and is had the polymer rete, and the non-pattern printing district cladding in polymer rete bottom side has the sensitization rete, and this sensitization rete sets up at a distance from printing district boundary line.

In the structure, the polymer film layer is adhered to the lower side surface of the metal screen, and the polymer material film is used for replacing the traditional photosensitive material layer, so that the manufacturing process is simpler, the manufacturing precision is high, the wear resistance of the printing surface of the screen printing plate is greatly improved, and the service life of the screen printing plate is greatly prolonged; especially, the non-pattern printing district cladding of polymer pad pasting layer bottom side has the sensitization protecting film layer, and the setting of sensitization protecting film layer has played the effect of separating sharp edges of base materials such as polymer pad pasting layer and crystal silicon battery piece, avoids completely that sharp edge of base material scrapes the damage to drawing of polymer pad pasting, has protected the most critical printing pattern pad pasting in the half tone effectively, has both prolonged the life of half tone, has also guaranteed the precision of half tone printing, avoids the waste and the loss of printing thick liquids. The photosensitive protective film layer is arranged away from the boundary line of the printing area, so that the acute angle of the printing substrate is ensured to correspond to the area where the photosensitive protective film layer is located, the protection effect of the protective film layer is optimized accurately by the position of the photosensitive protective film layer, and the protective film layer is convenient to manufacture.

In a further embodiment of the present invention, the film width C of the photosensitive film protecting layer, the distance d between the inner end of the photosensitive film protecting layer and the printing area boundary, the distance b from the printing area boundary to the outer edge of the printed silicon wafer, and the distance a from the outer end of the polymer film attaching layer to the printing area boundary; a is greater than or equal to C + d, and b is greater than d. The photosensitive film protecting layer covers the outer end part of the printing silicon chip. The structure ensures the precision of the position of the protective film layer and the reliable protection effect.

The utility model discloses a preferred embodiment, be provided with pad film layer wire casing on the polymer pad film layer, it has the membrane end to fill out the glue film to coat on stretching the wire mesh between end and the polymer pad film layer in the stretch-draw silk screen, and it has the net end to fill out the glue film to coat on the stretch-draw silk screen between the overhanging end of adhesive layer and the net frame internal face. The screen printing plate has longer service life, avoids the leakage of printing slurry and improves the printing precision.

In the preferred embodiment of the present invention, the upper side of the metal mesh is covered with a photosensitive emulsion layer, a photosensitive layer slot is provided on the photosensitive emulsion layer, a polymer lamination layer is provided with a lamination layer slot, and the lamination layer slot and the photosensitive layer slot are correspondingly communicated with each other; and a film end glue layer is coated on the metal wire mesh between the inward extending end of the tensioning wire mesh and the polymer film sticking layer, and a net end glue filling layer is coated on the tensioning wire mesh between the outward extending end of the adhesive layer and the inner wall surface of the net frame. Has the double advantages of a photosensitive emulsion layer and a high-molecular film pasting layer.

The utility model discloses a preferred embodiment, net end rubber filling layer and membrane end rubber filling layer are formed by the adhesive coating, perhaps are formed by sensitization of sensitization latex. The stretching wire mesh is a polyester wire mesh and is in a shape of a Chinese character 'hui', and the stretching wire mesh surrounds the periphery of the metal wire mesh; the metal wire mesh is formed by weaving metal weft and metal warp, and the metal weft and the metal warp are stainless steel wires.

Drawings

The following provides a more detailed description of the printing screen with pellicle structure according to the present invention with reference to the accompanying drawings and the following detailed description.

FIG. 1 is a schematic structural diagram of an embodiment of a printing screen with a pellicle structure according to the present invention;

FIG. 2 is a schematic cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is a schematic cross-sectional view of one embodiment of the cross-section B-B shown in FIG. 1;

FIG. 4 is a schematic cross-sectional view of another embodiment of the cross-section B-B shown in FIG. 1.

Reference numbers in the figures: the printing method comprises the following steps of 1-screen frame, 2-stretching screen mesh, 3-metal screen mesh, 31-metal weft, 32-metal warp, 4-adhesive layer, 5-photosensitive protective film layer, 6-film end glue filling layer, 7-screen end glue filling layer, 8-printing area boundary line, 9-high polymer film pasting layer, 10-film pasting layer line groove, 11-photosensitive emulsion layer, 12-photosensitive layer line groove, 13-printing silicon chip, M-pattern printing area and N-non-pattern printing area.

Detailed Description

As shown in fig. 1 and 2, the screen structure with a smooth scraping margin includes a screen frame 1, the screen frame 1 is made of an aluminum alloy, a window for stretching a metal mesh 3 and a tension mesh 2 is disposed at a central position of the screen frame 1, the metal mesh 3 is stretched on a bottom side surface of the screen frame 1 through the tension mesh 2, the tension mesh 2 is directly adhered to the bottom side surface of the screen frame 1 through an adhesive, the metal mesh 3 is disposed in the window at the central position of the tension mesh 2, and an outer periphery of the metal mesh 3 is overlapped with an inner edge of the window of the tension mesh 2 through an adhesive layer 4. The tensioning wire mesh 2 is a polyester wire mesh in a shape like a Chinese character 'hui', the metal wire mesh 3 is formed by interweaving metal weft threads 31 and metal warp threads 32, and the metal weft threads 31 and the metal warp threads 32 are both stainless steel wires.

The wire mesh 3 and the tension wire mesh 2, which are overlapped with each other, are divided into a pattern printing area M and a non-pattern printing area N by a printing area boundary line 8, and the printing area boundary line 8 is matched with the pattern area and the non-pattern area boundary line of the printing silicon wafer 13, so that the pattern printing area M corresponds to the pattern printing area of the adhesive film layer and the printing silicon wafer 13, and the non-pattern printing area N is a zigzag area surrounding the outer periphery of the pattern printing area M.

The extending end of the adhesive layer 4 for lapping the stretching wire mesh 2 and the metal wire mesh 3 extends towards the inner wall surface of the mesh frame 1 to be coated on the stretching wire mesh 2 in the shape of the Chinese character 'hui', and the adhesive layer 4 is a thermoplastic resin (PE) layer so as to enable the thermoplastic resin to be coated on the stretching wire mesh 2 in the shape of the Chinese character 'hui', thereby generating the blocking effect on the mesh holes of the stretching wire mesh 2. Because the overhanging end of the adhesive layer 4 is difficult to form seamless butt joint with the inner wall surface of the screen frame 1, a ring-shaped gap seam exists between the tensioned screen 2 and the inner wall surface of the screen frame 1, and a screen end glue filling layer 7 is coated on the tensioned screen 2 corresponding to the ring-shaped gap seam so as to block the printing slurry from leaking from one side to the other side along the meshes of the tensioned screen 2, thereby forming a tight anti-leakage structure; the metal silk screen 3 at the inward extending end of the inner circle edge of the tensioning silk screen 2 is also coated with a ring-shaped film end glue filling layer 6, so that the printing slurry is prevented from leaking from one side to the other side along the meshes of the metal silk screen 3 corresponding to the gaps. The net end glue filling layer 7 and the film end glue filling layer 6 are formed by coating an adhesive or formed by photo-hardening photosensitive emulsion.

The non-pattern printing area N adhered to the bottom side of the polymer film layer 9 on the lower side of the metal screen 3 is coated with a photosensitive film protecting layer 5, and the inner side edge of the photosensitive film protecting layer 5 is arranged at a distance from the boundary line 8 of the printing area. Because the photosensitive protective film layer 5 and the polymer film layer 9 always have a height difference, if the inner side edge of the photosensitive protective film layer 5 coincides with the printing area boundary line 8, a virtual printing phenomenon of a printing pattern may occur, and the printing precision and the printing quality of the screen printing plate are directly influenced. The distance between the inner side edge of the photosensitive film protecting layer 5 and the printing area boundary line 8 is adopted, so that the phenomenon of false printing during printing can be effectively avoided. As shown in fig. 2, the film width C of the photosensitive protective film layer 5, the distance d between the inner end of the photosensitive protective film layer 5 and the printing area boundary 8, the distance b from the printing area boundary 8 to the outer edge of the printed silicon wafer 13, and the distance a from the outer end of the polymer adhesive film layer 9 to the printing area boundary 8; in order to ensure that the photosensitive protective film layer 5 covers the outer end part of the printing silicon wafer 13, a is more than or equal to C + d, and b is more than d, so that the sharp edge of the printing silicon wafer 13 is ensured not to be collided and damaged with the polymer film sticking layer 9 all the time.

As shown in fig. 3, a polymer film layer 9 is adhered to the lower side surface of the metal mesh 3, and the polymer film layer 10 is formed by adhering polymer films such as PET, PE, PI, PU, PVC, PS, and the like; the high polymer film layer 9 is provided with a film layer wire slot 10, the film layer wire slot 10 forms a printing pattern, and the film end glue filling layer 6 is coated on the mesh surface of a ring-shaped gap of the metal wire mesh 3 between the inward extending end of the tension wire mesh 2 and the high polymer film layer 9.

As shown in fig. 4, a photosensitive emulsion layer 11 is coated on the upper side of the wire 3, and the photosensitive emulsion layer 11 is formed by coating and sensitizing a photosensitive emulsion. The outer surface of the photosensitive emulsion layer 11 is in direct contact with a scraper, a plurality of photosensitive layer slots 12 are designed on the photosensitive emulsion layer 11 according to printing patterns, and the photosensitive layer slots 12 are through slots. A polymer film layer 9 is pasted on the lower side surface of the metal screen 3, the polymer film layer 9 is formed by pasting high polymer films such as PET, PE, PI, PU, PVC, PS and the like, a plurality of film layer slots 10 are designed on the polymer film layer 9 according to the printing pattern, the film layer slots 10 form the printing pattern to be printed, and the film layer slots 10 are also through slots. The photosensitive layer wire slot 12 on the photosensitive emulsion layer 11 corresponds to the film layer wire slot 10 on the polymer film layer 9, the slot opening width a 'of the corresponding photosensitive layer wire slot 12 is greater than the slot opening width a of the film layer wire slot 10, and the wire slot central line L' of the photosensitive layer wire slot 12 and the slot central line L of the film layer wire slot 10 are on the same straight line. The membrane end glue layer 6 is coated on the mesh surface of a ring-shaped gap on the metal wire mesh 3 between the inner extending end of the stretching wire mesh 2 and the polymer film sticking layer 9.

The above description has been given of some preferred embodiments of the present invention, but the present invention is not limited thereto, and any modifications and variations made under the same innovative principles fall within the protective scope of the present invention.

Claims

1. The utility model provides a printing half tone with protective film structure, including screen frame (1) and wire screen (3), wire screen (3) are stretched on screen frame (1) through stretch-draw silk screen (2), wire screen (3) and stretch-draw silk screen (2) overlap joint each other through adhesive layer (4), overlap joint each other wire screen (3) and stretch-draw silk screen (2) are divided into pattern printing district (M) and non-pattern printing district (N) by printing district boundary line (8), non-pattern printing district (N) is the font of returning, this non-pattern printing district (N) is around the periphery in pattern printing district (M), its characterized in that: the downside of wire mesh (3) is pasted and is had polymer pad pasting layer (9), and non-pattern printing district (N) cladding in polymer pad pasting layer (9) bottom side has sensitization protecting film layer (5), and this sensitization protecting film layer (5) sets up apart from printing district boundary line (8).

2. The printing screen with pellicle structure of claim 1, further comprising: the film width C of the photosensitive film-protecting layer (5), the distance d between the inner end of the photosensitive film-protecting layer (5) and the printing area boundary (8), the distance b from the printing area boundary (8) to the outer edge of the printing silicon wafer (13), and the distance a from the outer end of the polymer film-sticking layer (9) to the printing area boundary (8); a is greater than or equal to C + d, and b is greater than d.

3. The printing screen with pellicle structure of claim 1 or 2, further comprising: the photosensitive film protecting layer (5) covers the outer end part of the printing silicon chip (13).

4. The printing screen with pellicle structure of claim 1, further comprising: the high polymer film sticking layer (9) is provided with a film sticking layer wire groove (10), a film end glue filling layer (6) is coated on a metal wire mesh (3) between an inner extending end of the tensioning wire mesh (2) and the high polymer film sticking layer (9), and a net end glue filling layer (7) is coated on the tensioning wire mesh (2) between an outer extending end of the adhesive layer (4) and the inner wall surface of the net frame (1).

5. The printing screen with pellicle structure of claim 1, further comprising: the upper side of the metal wire mesh (3) is covered with a photosensitive emulsion layer (11), a photosensitive layer wire slot (12) is arranged on the photosensitive emulsion layer (11), a high polymer film layer wire slot (10) is arranged on the high polymer film layer (9), and the film layer wire slot (10) and the photosensitive layer wire slot (12) are correspondingly communicated with each other; a film end glue filling layer (6) is coated on the metal wire mesh (3) between the inward extending end of the tensioning wire mesh (2) and the polymer film sticking layer (9), and a net end glue filling layer (7) is coated on the tensioning wire mesh (2) between the outward extending end of the adhesive layer (4) and the inner wall surface of the net frame (1).

6. The printing screen with pellicle structure of claim 4 or 5, further comprising: the net end glue filling layer (7) and the film end glue filling layer (6) are formed by coating an adhesive or formed by photosensitive emulsion.

7. The printing screen with pellicle structure of claim 1, further comprising: the stretching wire mesh (2) is a polyester wire mesh, the stretching wire mesh (2) is in a shape of a Chinese character 'hui', and the stretching wire mesh (2) surrounds the periphery of the metal wire mesh (3); the metal wire mesh (3) is formed by weaving metal weft (31) and metal warp (32), and the metal weft (31) and the metal warp (32) are stainless steel wires.