A steel mesh aperture structure for silver paste printing

Abstract

The utility model relates to electronic manufacturing technical field especially, a kind of steel mesh opening structure of silver paste printing.Its technical scheme includes printing steel mesh body, multiple openings are equipped on the printing steel mesh body, the inner wall of one side of the opening is equipped with mounting groove, the inner wall of one side of the mounting groove is equipped with insertion slot, the top of the printing steel mesh body is equipped with multiple fixed slots, the fixed slot is located in one side of the insertion slot, flow guide groove module for allowing ramp position to move outward is equipped in the mounting groove, the flow guide groove module includes flow guide frame, insertion strip is fixedly equipped in one side of the flow guide frame, the utility model is set by flow guide frame, insertion strip and slot, can make the ramp position generated in printing process be in the periphery of opening, ramp position can be moved outward, avoid ramp to appear in chip patching work area, thereby reduce the height difference of chip due to printing is too large, uneven stress problem appears, chip rupture defect appears in sintering process.

Description

Technical Field

[0001] This utility model relates to the field of electronic manufacturing technology, and in particular to a stencil opening structure for silver paste printing. Background Technology

[0002] In modern electronics manufacturing processes, stencil printing plays a crucial role. Especially in applications involving printing silver paste onto ceramic substrates, the printing quality directly affects the performance and reliability of subsequent products. The process involves first filling the square grooves of the stencil with the silver paste, then applying external force with a squeegee to push the paste along the openings of the stencil onto the ceramic substrate.

[0003] Because the stencil opening is a square groove structure, at the moment the squeegee leaves the edge of the stencil groove, the edge of the silver paste will form a slope structure due to its own characteristics and the force of the squeegee. This causes a serious height difference between the thickness of the silver paste at the squeegee's entry point and the thickness at the exit point, resulting in the chip cracking due to uneven stress during the sintering process. In view of the above reasons, this application proposes a stencil opening structure for silver paste printing. Utility Model Content

[0004] The purpose of this invention is to address the problems existing in the background technology by proposing a perforated stencil structure for silver paste printing.

[0005] The technical solution of this utility model is as follows: a steel mesh opening structure for silver paste printing, including a printed steel mesh body, the printed steel mesh body having multiple openings, an installation groove on one side of the inner wall of the opening, a slot on one side of the inner wall of the installation groove, multiple fixing grooves on the top of the printed steel mesh body, the fixing grooves being located on one side of the slots, and a guide groove module for moving the slope position outward in the installation groove. The flow guide module includes a flow guide frame, with an insert fixedly provided on one side of the flow guide frame and a slot provided on one side of the insert.

[0006] Optionally, a through groove is provided on one side of the inner wall of the fixing groove, and a positioning structure for locking the flow guide module is provided in the fixing groove.

[0007] Optionally, the positioning structure includes a connecting column that is movably connected to the fixing groove, and a retaining plate is fixedly provided at the bottom end of the connecting column.

[0008] Optionally, two sliding grooves are provided on the inner walls of both sides of the fixing groove, and two sliders are fixedly provided on both sides of the connecting column, with the sliders and sliding grooves being movably connected.

[0009] Optionally, the card plate is adapted to the card slot and through slot, and the depth of the card slot is -cm.

[0010] Optionally, two springs are fixedly provided on the side of the connecting post away from the insert, and the other ends of the two springs are fixedly connected to the inner wall of the fixing groove.

[0011] Optionally, the length of the flow guide frame is 500-600um, the width is 40-60um, and the depth is 20-40um.

[0012] Compared with the prior art, the present invention has the following beneficial technical effects: 1. By setting up the flow guide frame, insert strip and card slot, this utility model can make the slope position generated during the printing process located on the periphery of the opening. The slope position can be moved outward to avoid the slope appearing in the chip mounting work area, thereby reducing the problem of chip cracking defects caused by excessive height difference and uneven force due to printing.

[0013] 2. This utility model, through the setting of fixed groove, through groove, connecting column, clamping plate, spring and slider, can realize the quick assembly and disassembly of the flow guide frame. Before use, the flow guide groove module of different size can be replaced according to parameters such as silver paste type, printing speed, chip size, etc., to improve the adaptability to different process conditions. Attached Figure Description

[0014] Figure 1 A three-dimensional structural schematic diagram of this utility model is provided; Figure 2 A side sectional view of the present invention is provided; Figure 3 A three-dimensional structural schematic diagram of the printed steel mesh body in this utility model is provided; Figure 4 A three-dimensional structural schematic diagram of the flow guide module in this utility model is provided; Figure 5 A three-dimensional schematic diagram of the positioning structure in this utility model is provided.

[0015] Figure label: 1. Printed steel mesh body; 2. Opening; 3. Mounting slot; 4. Slot; 5. Fixing groove; 6. Through groove; 7. Flow guide module; 71. Flow guide frame; 72. Insert; 73. Card slot; 8. Positioning structure; 81. Connecting column; 82. Clamping plate; 83. Spring; 84. Slider. Detailed Implementation

[0016] The technical solutions of this disclosure will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments.

[0017] The components of the embodiments of this disclosure, which are typically described and shown in the accompanying drawings, can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of embodiments of this disclosure provided in the drawings is not intended to limit the scope of the claimed disclosure, but merely to illustrate selected embodiments of the disclosure.

[0018] All other embodiments obtained by those skilled in the art based on the embodiments in this disclosure without inventive effort are within the scope of protection of this disclosure.

[0019] In the description of this disclosure, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0020] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0021] Example like Figure 1-5As shown, the present invention proposes a silver paste printing stencil opening structure, including a printed stencil body 1. The printed stencil body 1 has multiple openings 2. An installation groove 3 is provided on one inner wall of each opening 2 to accommodate a flow guide frame 71. A slot 4 is provided on one inner wall of the installation groove 3, and the slot 4 and insert 72 are compatible, improving the installation stability of the flow guide frame 71. Multiple fixing grooves 5 are provided on the top of the printed stencil body 1, located on one side of the slot 4. A flow guide module for moving the slope position outward is provided within the installation groove 3. 7. The flow guide module 7 includes a flow guide frame 71. The flow guide frame 71 has a length of 520um, a width of 50um, and a depth of 30um. An insert 72 is fixedly provided on one side of the flow guide frame 71, and a slot 73 is provided on one side of the insert 72. The flow guide module 7 is designed so that the slope generated during the printing process is located outside the opening 2. The slope position can be moved outward to avoid the slope appearing in the chip mounting working area, thereby reducing the problem of excessive height difference and uneven force on the chip caused by printing, and preventing chip cracking defects during the sintering process. A through groove 6 is provided on one inner wall of the fixed groove 5. The fixed groove 5 is provided with a positioning structure 8 for locking the guide groove module 7. The positioning structure 8 includes a connecting post 81 that is movably connected to the fixed groove 5. Two sliding grooves are provided on both inner walls of the fixed groove 5. Two sliders 84 are fixed on both sides of the connecting post 81. The sliders 84 are movably connected to the sliding grooves. The setting of the two sets of sliders 84 can improve the synchronization of the upper and lower ends of the connecting post 81 and reduce the probability of the connecting post 81 being unusable due to excessive tilt angle. A locking plate 82 is fixed at the bottom end of the connecting post 81. Two springs 83 are fixed on the side of the connecting post 81 away from the insert 72. The other ends of the two springs 83 are fixedly connected to the inner wall of the fixed groove 5. The locking plate 82 is compatible with the locking groove 73 and the through groove 6. The depth of the locking groove 73 is 2cm. The setting of the positioning structure 8 can realize the quick assembly and disassembly of the guide frame 71, so that the guide groove module 7 of different sizes can be replaced according to parameters such as silver paste type, printing speed, and chip size, thereby improving the adaptability to different process conditions.

[0022] In this embodiment, the flow guide module 7 ensures that the slope generated during the printing process is located outside the opening 2. After the silver paste is applied and fills the opening 2, the squeegee applies force to print the silver paste along the stencil. When the squeegee leaves the edge of the stencil opening 2, a slope is created at the edge of the silver paste. The flow guide frame 71 ensures that the slope generated during the printing process is located outside the opening 2. This outward movement of the slope prevents it from appearing in the chip mounting area, thereby reducing the problem of excessive height difference and uneven stress on the chip caused by printing, which could lead to chip breakage during the sintering process. Operators can replace different models of the flow guide frame 71 according to the type of silver paste and the size of the chip, and connect the connecting post 81 towards... Pulling away from the flow guide frame 71 causes the connecting column 81 to drive the slider 84 and the clamping plate 82, and squeeze the spring 83 on one side. When the clamping plate 82 comes out of the slot 73, pull the flow guide frame 71 upward to complete the disassembly of the flow guide frame 71. During installation, insert the insert 72 into the fixing slot 5, so that the slot 73 and the through slot 6 coincide. Then stop applying force to the connecting column 81. The elastic force of the spring 83 causes the connecting column 81 to reset. The connecting column 81 then drives the clamping plate 82 to reset, so that one side of the clamping plate 82 passes through the through slot 6 and is clamped into the slot 73, thus completing the fixation of the flow guide frame 71 and realizing the replacement of the flow guide frame 71. The replaceable flow guide frame 71 can improve the adaptability to different process conditions.

[0023] The above specific embodiments are merely optional embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A stencil opening structure for silver paste printing, comprising a printed stencil body (1), characterized in that: The printed steel mesh body (1) is provided with multiple openings (2), and an installation groove (3) is provided on one side of the inner wall of the opening (2). A slot (4) is provided on one side of the inner wall of the installation groove (3). The top of the printed steel mesh body (1) is provided with multiple fixing grooves (5). The fixing groove (5) is located on one side of the slot (4). The installation groove (3) is provided with a guide groove module (7) for moving the slope position outward. The flow guide module (7) includes a flow guide frame (71), with a strip (72) fixedly provided on one side of the flow guide frame (71), and a slot (73) provided on one side of the strip (72).

2. The stencil opening structure for silver paste printing according to claim 1, characterized in that, The inner wall of one side of the fixing groove (5) is provided with a through groove (6), and the fixing groove (5) is provided with a positioning structure (8) for locking the guide groove module (7).

3. The stencil opening structure for silver paste printing according to claim 2, characterized in that, The positioning structure (8) includes a connecting column (81) that is movably connected to the fixing groove (5), and a card plate (82) is fixedly provided at the bottom end of the connecting column (81).

4. The stencil opening structure for silver paste printing according to claim 3, characterized in that, The inner walls of both sides of the fixed groove (5) are provided with two sliding grooves, and the two sides of the connecting column (81) are fixed with two sliders (84), and the sliders (84) and the sliding grooves are movably connected.

5. The stencil opening structure for silver paste printing according to claim 3, characterized in that, The card plate (82) is adapted to the card slot (73) and the through slot (6), and the depth of the card slot (73) is 1-3cm.

6. The stencil opening structure for silver paste printing according to claim 3, characterized in that, Two springs (83) are fixedly provided on the side of the connecting post (81) away from the insert (72), and the other ends of the two springs (83) are fixedly connected to the inner wall of the fixing groove (5).

7. The stencil opening structure for silver paste printing according to claim 1, characterized in that, The flow guide frame (71) has a length of 500-600um, a width of 40-60um, and a depth of 20-40um.

Images