Screen version body and printing screen

Abstract

The utility model discloses a kind of screen version bodies, it includes carrier and the printing grid line of being set to carrier, printing grid line is long and set and includes bridge section, bridge section is spaced along the length direction and is provided with several ink bridges, adjacent ink bridge is through the ink hole of being set between, carrier includes the printing surface and the printing surface of being oppositely arranged, bridge section is recessed with ink expansion area on the printing surface side, ink expansion area is communicated with ink hole setting, ink storage and ink are passed using ink expansion area, improve ink performance, guarantee printing quality, increase service life.In addition, the utility model also discloses a printing screen with the above screen version body.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic technology, and in particular to a screen printing body and a printing screen. Background Technology

[0002] Solar energy, as an inexhaustible and renewable clean energy source, has attracted much attention for its utilization technologies. As the core process carrier in the fabrication of solar cell electrodes, the performance of the printing screen directly affects the electrode forming quality and production cost. In the printing process, a squeegee drives the paste to move across the surface of the printing screen, transferring the paste through a precisely designed mesh pattern to the silicon wafer surface, forming electrodes with specific linewidths and thicknesses.

[0003] Electrodes bear the core function of collecting photogenerated carriers and facilitating current flow. Therefore, the ink application performance of the mesh body, as a core process parameter, directly determines the forming quality of the electrodes. Insufficient ink application performance may lead to electrode breakage, narrowing, or aspect ratio imbalance, or may cause uneven electrode thickness, rough edges, or bonding defects, thereby threatening the reliability and lifespan of the solar cell. Summary of the Invention

[0004] Therefore, it is necessary to provide a new screen printing body and printing screen to solve the above-mentioned technical problems.

[0005] One technical solution of this utility model is: a screen printing body, which includes a carrier and printing grid lines disposed on the carrier. The printing grid lines are arranged longitudinally and include bridge segments. The bridge segments are provided with a plurality of ink bridges at intervals along the longitudinal direction. An ink downhole is disposed through adjacent ink bridges. The carrier includes a printing surface and a printing surface disposed opposite to each other. The bridge segments are provided with an ink expansion area on the side of the printing surface. The ink expansion area is connected to the ink downhole.

[0006] In one embodiment, the ink extension area is located on both sides of the ink outlet and extends to the bottom of the ink bridge.

[0007] In one embodiment, the ink extension area is shaped like an edge groove, the width W of the edge groove along the plane direction of the printing surface is in the range of 1-300μm and the depth D along the thickness direction of the carrier is in the range of 1-20μm.

[0008] In one embodiment, the edge trench has an inclined or arc-shaped guide trench bottom.

[0009] In one embodiment, the bridge segment has a conformal structure protruding from the bottom of the guide groove on the printed surface side.

[0010] In one embodiment, the bridge segment of the printed grid line has a stepped area protruding on the printing surface side, and the stepped area is correspondingly provided with the ink expansion area.

[0011] In one embodiment, the printing grid line includes a printing groove recessed from the printing surface and a printing opening extending from the bottom of the printing groove through the printing surface, wherein at least one section of the printing opening is formed as the bridge segment having the ink bridge and the ink hole.

[0012] In one embodiment, the width of the ink outlet located in the middle of the bridge segment is greater than the width of the ink outlets located at both ends, or the width of the ink outlets in the bridge segment gradually decreases from the middle to both ends.

[0013] In one embodiment, the side of the Xiamo Bridge is formed as a guide slope that is inclined to the left and / or right and up and down with respect to the longitudinal direction.

[0014] In one embodiment, the carrier is a single layer or at least two layers stacked together, the at least two layers including a top layer with the printing surface and a bottom layer with the printing substrate, and the depth of the ink spread area is not greater than the thickness of the bottom layer.

[0015] In one embodiment, the carrier includes a top layer, a bottom layer, and an intermediate layer located between the top layer and the bottom layer, the printing groove is disposed on the top layer, the ink bridge is disposed on the intermediate layer, and the ink expansion area is disposed on the bottom layer.

[0016] In one embodiment, the bridge segment has a conformal structure on the printing surface side relative to the ink spread area, the conformal structure being located on the bottom layer or extending to the intermediate layer.

[0017] In one embodiment, the bridge segment is further recessed on the printing surface side from the bottom of the printing groove, and the expansion groove is provided corresponding to the ink expansion area. The expansion groove is connected to the ink expansion area through the ink outlet hole.

[0018] This utility model also discloses a printing screen, which includes a screen frame and a screen body as described above, mounted on the screen frame.

[0019] The beneficial effects of this utility model are as follows: the bridge section has an ink expansion area recessed on the printing surface, and the ink expansion area is connected to the ink outlet hole. By utilizing the ink expansion area to store and pass ink, the ink distribution is improved, the printing quality is guaranteed, and the service life is increased. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the web version of this utility model; Figure 2 for Figure 1 A magnified view of a portion of the China Open version; Figure 3 for Figure 2 A schematic diagram of the hierarchical structure of the China Open version; Figure 4 for Figure 2 Another hierarchical structure diagram of the China Open version; Figure 5 This is another hierarchical structure diagram of the web version body of this utility model; Figure 6 for Figure 5 Another hierarchical structure diagram of the web version body; Figure 7 This is another hierarchical structure diagram of the web version of this utility model; Figure 8 for Figure 7 Another hierarchical structure diagram of the web version body; Figure 9 This is another hierarchical structure diagram of the web version of this utility model; Figure 10 for Figure 9 Another hierarchical structure diagram of the web version body; Figure 11 This is another schematic diagram of the grid line structure of the mesh version of this utility model; Figure 12 for Figure 11 A partially enlarged schematic diagram of the grid line structure of the halftone body; Figure 13 This is another schematic diagram of the grid line structure of the mesh version of this utility model; Figure 14 for Figure 13 A partially enlarged schematic diagram of the grid line structure of the halftone body; Figure 15 This is another partially enlarged structural diagram of the web version of this utility model; Figure 16 for Figure 15 A schematic diagram of the hierarchical structure of the web version body; Figure 17 This is another hierarchical structure diagram of the web version of this utility model; Figure 18 This is a schematic diagram of the printing screen of this utility model. Detailed Implementation

[0021] To facilitate understanding of this utility model, a more comprehensive description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described below. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0022] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0024] This utility model discloses a screen printing body, which includes a carrier and printing grid lines disposed on the carrier. The printing grid lines are arranged longitudinally and include bridge segments. Several ink-passing bridges are distributed at intervals along the longitudinal direction of the bridge segments. An ink-draining hole is disposed through adjacent ink-passing bridges. The carrier includes a printing surface and a printing surface disposed opposite to each other. An ink expansion area is recessed on the printing surface side of the bridge segment. The ink expansion area is connected to the ink-draining hole. By utilizing the ink expansion area to store and pass ink, the ink-draining performance is improved, the printing quality is guaranteed, and the service life is increased.

[0025] In one embodiment, the ink extension area is located on both sides of the ink outlet and extends to the bottom of the ink bridge, forming a bridge hole to facilitate the ink passing through the ink bridge and improve ink flow.

[0026] In one embodiment, the ink spreading area is shaped like an edge groove, with the width W of the edge groove along the plane of the printing surface ranging from 1 to 300 μm and the depth D along the thickness direction of the substrate ranging from 1 to 20 μm. The edge groove has an oblique or arc-shaped guide groove bottom. The bridge segment on the printing surface side has a conformal structure protruding relative to the guide groove bottom. In other embodiments, the guide groove bottom is right-angled. Furthermore, the bridge segment of the printing grid line has a stepped area protruding on the printing surface side, the stepped area corresponding to the ink spreading area, to increase strength and facilitate control of the doctor blade to improve ink application performance.

[0027] In one embodiment, the printing grid line includes a printing groove recessed from the printing surface and a printing opening extending from the bottom of the printing groove through the printing substrate. At least one section of the printing opening is formed as a bridge segment with an ink bridge and an ink outlet. The opening width of the printing groove is 100-1000 μm, and the width of the printing opening is 5-50 μm. Generally, the width of the printing opening in the bridge segment is 15-50 μm. The width of the ink outlet located in the middle of the bridge segment is greater than the width of the ink outlets located at both ends, or the width of the ink outlets in the bridge segment gradually decreases from the middle to both ends. The printing opening is widened in the bridge segment, and an ink bridge is formed after the widening. An ink outlet is formed between adjacent ink bridges. The widening can be uniform or gradually increased. The width at the junction of the bridge segment and the non-bridge segment can change abruptly, gradually, or progressively. The ink expansion zone is set on one or both sides of the printing opening along the bridge segment, and can be set locally, intermittently, or along the entire length of the bridge segment. The ink expansion zone can be selectively set on one or both sides of the printing opening of non-bridge segments.

[0028] In one example, the side of the ink bridge is formed as a guide slope inclined horizontally and / or vertically to the longitudinal direction. The printing direction is defined as one of the longitudinal directions of the printing grid lines, and the guide slope is inclined to the direction opposite to the printing direction. When the printing direction is defined as the X direction, the direction perpendicular to the X direction on the printing surface is the Y direction, and several printing grid lines are arranged at intervals along the Y direction. The direction perpendicular to the X direction in the thickness direction of the carrier is the Z direction. The guide slope can be set at an angle to the Y direction, and / or, the guide slope can be set at an angle to the Z direction. When the guide slope is at an angle to the Y direction, viewed from above on the printing surface, the ink bridge appears as an inclined bridge, which can be a parallelogram, trapezoid, or other shapes. When the guide slope is at an angle to the Z direction, the cross-sectional shape of the ink bridge is an inverted trapezoid, inverted triangle, or other shapes. The guide slope can be a plane, an arc surface, or a curved surface. The guide slope can disperse the force during printing, improve the fluidity of the ink, increase ink distribution, and improve printing performance.

[0029] In one embodiment, the carrier is a single, integral layer or at least two stacked layers. The at least two layers include a top layer with a printing surface and a bottom layer with a substrate surface, and the depth of the ink spread area is no greater than the thickness of the bottom layer. When the carrier is a single, integral layer, it can originally be a single layer, or it can be formed by fusing two or three layers together. When the carrier has at least two layers, adjacent layers have interfaces due to different materials or lack of fusion. For example, the carrier includes a top layer, a bottom layer, and an intermediate layer located between the top and bottom layers, with the printing groove disposed on the top layer, the ink bridge disposed on the intermediate layer, and the ink spread area disposed on the bottom layer.

[0030] In one embodiment, the bridge segment has a conformal structure on the printing side relative to the ink spread area, the conformal structure being located on the bottom layer or extending to the intermediate layer.

[0031] In one embodiment, the bridge segment is further recessed from the bottom of the printing groove on the printing surface side, with an expansion groove corresponding to the ink expansion area. The expansion groove is connected to the ink expansion area through an ink dispensing hole. The distribution width of the expansion groove is greater than, equal to, or less than the distribution width of the ink expansion area, the distribution length of the expansion groove is greater than, equal to, or less than the distribution width of the ink expansion area, and the depth of the expansion groove ranges from 1 to 10 μm. This reduces the thickness of the ink bridge area, increases ink flow, and thus improves ink dispensing performance and printing quality.

[0032] This utility model also discloses a printing screen, which includes a screen frame and a screen body as described above, mounted on the screen frame. The printing screen has good ink application and printing performance.

[0033] The following description, with reference to the figures, illustrates the screen printing body and printing screen of this utility model.

[0034] Please refer to Figures 1 to 4 This utility model discloses a screen printing body 100, which includes a carrier body 1 and printing grid lines 2 disposed on the carrier body 1. The printing grid lines 2 are longitudinally arranged and include bridge segments 3. Several ink-passing bridges 31 are distributed at intervals along the longitudinal direction of the bridge segments 3, and ink-draining holes 32 are arranged through adjacent ink-passing bridges 31. The carrier body 1 includes a printing surface 11 and a printing surface 12 disposed opposite to each other. An ink expansion area 33 is recessed on the printing surface 12 side of the bridge segments 3. The ink expansion area 33 is connected to the ink-draining holes 32. The ink expansion area 33 is used to store and pass ink, so as to ensure printing quality and increase service life.

[0035] Furthermore, the printed grid lines 2 are defined to extend along the X direction and be spaced apart along the Y direction. In this embodiment, the X direction is perpendicular to the Y direction, and the Z direction is perpendicular to both the X and Y directions along the thickness direction of the carrier 1. The ink expansion area 33 is located on both sides of the ink outlet 32 ​​and extends to the bottom of the ink bridge 31, forming a bridge hole 311 under the ink bridge 31. The ink expansion area 33 is grooved at the edge, and the width W of the groove along the plane of the carrier 1 ranges from 1 to 300 μm, and the depth D along the thickness direction of the carrier 1 ranges from 1 to 20 μm. The bridge segment 3 of the printed grid line 2 has a stepped area 34 protruding from the side of the printing surface 11. The stepped area 34 is correspondingly provided with the ink expansion area to increase strength and facilitate ink dispensing. The groove at the edge has an arc-shaped guide groove bottom 331. The bridge segment 3 has a conformal structure protruding from the printing surface 11 relative to the guide groove bottom 331, and the conformal structure forms the stepped area 34. In this embodiment, the guide groove 331 has the same shape and size as the conformal structure. In other embodiments, the guide groove 331 has the same shape and similar size as the conformal structure or has similar shape and size.

[0036] Please continue reading. Figures 1 to 4The printing grid line 2 includes a printing groove 21 recessed from the printing surface 11 and a printing opening 22 extending from the bottom of the printing groove 21 through the printing substrate 12. At least one section of the printing opening 22 forms a bridge segment 3 with an ink bridge 31 and an ink hole 32. The opening width of the printing groove 21 is 100-1000 μm, and the width of the printing opening 22 is 5-50 μm. The width of the printing opening 22 at the bridge segment 3 is 15-50 μm. In this embodiment, the width of the printing opening 22 at the bridge segment 3 is a gradient section that gradually decreases from the middle to both sides, and the length of the corresponding ink bridge 31 is also gradually changed from the middle to both sides. On the printing grid line 2, the section that starts to widen along the X direction from the width of the printing opening 22, gradually increases, and then gradually decreases back to the initial width is the bridge segment 3. In the X direction, the length of the ink extension area 33 is slightly less than the length of the bridge segment 3. The over-ink bridge 3 is set at an angle to the Y direction, with the angle ranging from 5° to 85°. One side of the over-ink bridge 3 is a guide slope 332, and the bottom of the guide slope 332 is arc-shaped.

[0037] Furthermore, the carrier 1 is a single, integrally formed layer, or it can be two or more layers fused together to form a single structure. In the case of two or more layers, each layer has the same material. For other embodiments, please refer to... Figure 5 and Figure 6 The carrier 5 has two stacked layers: a top layer 51 and a bottom layer 52. The top layer 51 and the bottom layer 52 are made of the same material, such as nickel or a nickel alloy, and there is a clear interface between them. Alternatively, the top layer 51 and the bottom layer 52 can be made of different materials. A printing groove 53 extends through the top layer 51, and a printing opening 54 extends from within the printing groove 53 through the bottom layer 52. An ink extension area 55 is recessed in the bottom layer 52 and extends below the ink bridge 56.

[0038] For other implementation details, please refer to... Figure 7 and Figure 8 The carrier 6 includes a top layer 61, a bottom layer 62, and an intermediate layer 63 located between the top layer 61 and the bottom layer 62, all stacked together. A printing groove 64 extends through the top layer 61, and a printing opening 65 extends from the printing groove 64 through the intermediate layer 63 and the bottom layer 62. An ink bridge 66 is provided in the intermediate layer 63, and an ink expansion area 67 is recessed in the bottom layer 62. Inside the bottom of the printing groove 64, a stepped area 68 is provided along the edge of the printing opening 65, and the stepped area 68 and the ink expansion area 67 are correspondingly provided.

[0039] In other embodiments, please refer to Figure 9 and Figure 10 The carrier 7 includes a top layer 71, a bottom layer 72, and an intermediate layer 73 located between the top layer 71 and the bottom layer 72. The bottom layer 72 has an ink expansion area 74 recessed on its bottom side and a curved edge 721 protruding from its top side, while the corresponding top side of the intermediate layer 73 is flat.

[0040] In other embodiments, please refer to Figure 11 and Figure 12 The width of the printing opening 812 within the bridge segment 811 of the printing grid line 81 is generally set to gradually change from wide in the middle to narrow on both sides. The ink bridge 813 extends along the Y direction, and the ink expansion area 814 extends along the X direction and is connected to the printing opening 812. In another embodiment, please refer to... Figure 13 and Figure 14 The width of the printing opening 822 within the bridge segment 821 of the printing grid line 82 is uniformly widened, and the width of the printing opening 822 at the junction of the widened portion and the non-bridge segment is gradually changed to achieve a smooth transition. The ink expansion area 823 extends along the X direction and is connected to the printing opening 822, and the ink bridge 824 extends along the Y direction. In other embodiments, the ink bridge may also be set at an angle to the Y direction.

[0041] In other embodiments, please refer to Figure 15 and Figure 16 The bridge segment 831 of the printed grid line 83 is further recessed on the printing surface 832 side from the bottom of the printing groove 833, and an expansion groove 835 corresponding to the ink expansion area 834 is provided. The expansion groove 835 is connected to the ink expansion area 834 through the ink dispensing hole 836, which can reduce the thickness of the ink bridge 837 area, increase the ink flow, and thus improve ink dispensing performance and printing quality. In this embodiment, the distribution width of the expansion groove 835 is equal to the distribution width of the ink expansion area 834.

[0042] In other embodiments, please refer to Figure 17 The carrier 9 includes a top layer 91, a first intermediate layer 92, a second intermediate layer 93, and a fourth intermediate layer 94 stacked sequentially. The bottom side of the bottom layer 94 has a recessed ink expansion area 95. The bottom of the printing tank 96 further has a recessed expansion groove 97 corresponding to the ink expansion area 95. The expansion groove 97 communicates with the ink expansion area 95 through an ink outlet hole 98, which can reduce the thickness of the ink bridge 99 area, increase ink flow, and thus improve ink delivery and printing quality. In this embodiment, the distribution width of the expansion groove 97 is smaller than the distribution width of the ink expansion area 95, and the expansion groove 97 is located in the first intermediate layer 92 with a depth less than or equal to the thickness of the first intermediate layer 92.

[0043] Please refer to Figure 18 This utility model discloses a printing screen 200, which includes a screen frame 201 and a screen body 100 mounted on the screen frame 201. The printing screen 200 has good ink application and printing performance.

[0044] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail above with reference to the accompanying drawings. Many specific details are set forth in the above description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described above, and those skilled in the art can make similar improvements without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed above. Furthermore, the technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described; however, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification.

[0045] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A web version body, characterized in that, It includes a carrier and a printing grid line disposed on the carrier. The printing grid line is longitudinally arranged and includes bridge segments. Several ink bridges are distributed at intervals along the longitudinal direction of the bridge segments. An ink downhole is disposed through adjacent ink bridges. The carrier includes a printing surface and a printing surface disposed opposite to each other. An ink expansion area is recessed on the side of the printing surface of the bridge segment. The ink expansion area is connected to the ink downhole.

2. The web version according to claim 1, characterized in that, The ink expansion area is located on both sides of the ink outlet and extends to the bottom of the ink bridge.

3. The web version according to claim 1, characterized in that, The ink expansion area is shaped like a groove along the edge. The width W of the groove along the plane of the printing surface ranges from 1 to 300 μm, and the depth D along the thickness direction of the carrier ranges from 1 to 20 μm.

4. The web version according to claim 3, characterized in that, The edge trench has an inclined or arc-shaped guide trench bottom.

5. The web version according to claim 4, characterized in that, The bridge segment has a conformal structure protruding from the bottom of the guide groove on the printed surface side.

6. The web version according to claim 1, characterized in that, The bridge segment of the printed grid line has a stepped area protruding on the side of the printed surface, and the stepped area is correspondingly arranged with the ink expansion area.

7. The web version according to claim 1, characterized in that, The printing grid line includes a printing groove recessed from the printing surface and a printing opening extending from the bottom of the printing groove through the printing surface, wherein at least one section of the printing opening is formed as the bridge segment having the ink bridge and the ink hole.

8. The web version according to claim 7, characterized in that, The width of the ink outlet located in the middle of the bridge segment is greater than the width of the ink outlet located at both ends, or the width of the ink outlet gradually decreases from the middle to both ends of the bridge segment.

9. The web version according to claim 7, characterized in that, The side of the Xiamo Bridge is formed as a guide slope that is inclined to the left and right and / or up and down with respect to the longitudinal direction.

10. The web version according to claim 7, characterized in that, The carrier is a single layer or at least two layers stacked together. The at least two layers include a top layer with the printing surface and a bottom layer with the printing substrate. The depth of the ink spread area is not greater than the thickness of the bottom layer.

11. The web version according to claim 10, characterized in that, The carrier includes a top layer, a bottom layer, and an intermediate layer located between the top layer and the bottom layer. The printing groove is disposed on the top layer, the ink bridge is disposed on the intermediate layer, and the ink expansion area is disposed on the bottom layer.

12. The web version according to claim 11, characterized in that, The bridge segment has a conformal structure on the printing surface side relative to the ink expansion area, and the conformal structure is located on the bottom layer or extends to the intermediate layer.

13. The web version according to claim 7, characterized in that, The bridge segment has an expansion groove further recessed from the bottom of the printing groove on the printing surface side, which corresponds to the ink expansion area. The expansion groove is connected to the ink expansion area through the ink outlet hole.

14. A printing screen, characterized in that, It includes a screen frame and a screen body as described in any one of claims 1 to 13, mounted on the screen frame.

Images