Solder paste tube assembly

Abstract

The utility model discloses a kind of tin paste rubber tube components, including rubber tube and the plug compatible with the rubber tube, the plug includes cylindrical structure and the tapered structure being connected with the cylindrical structure, air release passage is uniformly provided on the cylinder wall of the cylindrical structure, the air release passage is penetrated along the axial direction The cylinder wall and extends to the tapered structure;Gas accumulated in the rubber tube is discharged along air release passage, to solve the problem of plug, and further solve the problem of unstable glue output, ensure the yield of packaged product.

Description

Technical Field

[0001] This utility model relates to the field of semiconductor packaging technology, and more specifically, to a solder paste tube assembly. Background Technology

[0002] In the process of applying solder paste to semiconductor packaging (especially chip bonding), solder paste or epoxy is usually filled into a tube; the tube and a stopper work together to dispense the paste. During dispensing, external compressed air acts on the stopper, pushing it downwards, thereby precisely expelling the solder paste from the tube through the dispensing nozzle.

[0003] Stopper jumping is a common problem in semiconductor packaging adhesive solder paste applications, specifically: during the dispensing process, the stopper detaches from the adhesive solder paste tube and bounces upwards. The reasons for stopper jumping are as follows: (1) Gas intrusion: During the high-frequency, high-speed dispensing process, due to manufacturing tolerances and material elasticity, there is a micron-sized gap between the outer edge of the stopper and the inner wall of the tube. Under high pressure, some of the compressed air will bypass the stopper, pass through this gap, and seep back into the tube cavity.

[0004] (2) Gas retention: After a single dispensing is completed and the air pressure is released, the stopper is pressed down by its own elasticity or slight back suction. The function of the scraper in its structure is to scrape the adhesive downward and seal the adhesive to prevent it from flowing back. However, this design creates a one-way valve effect for upward-moving gas, that is, the gas cannot be discharged from the tube through the scraper.

[0005] (3) Pressure buildup and plug jumping: As the dispensing and stopping cycles are repeated, the invading gas accumulates to form a high-pressure gas chamber. The pressure in this gas chamber continues to rise, eventually overcoming the static friction between the plug and the inner wall of the tube, pushing the plug to suddenly bounce upward, i.e., "plug jumping".

[0006] Jumping plugs can lead to unstable solder paste dispensing and air bubbles entering the solder paste, resulting in an increased rate of encapsulation defects. To address these issues, this invention urgently requires a venting solder paste tube assembly. Utility Model Content

[0007] In view of the above problems, the purpose of this utility model is to provide a solder paste tube assembly to solve the problem of increased encapsulation failure rate caused by the accumulation of more and more gas in the tube after repeated dispensing, which forms a plug.

[0008] This utility model provides a solder paste tube assembly, including a tube and a stopper adapted to the tube. The stopper includes a cylindrical structure and a tapered structure connected to the cylindrical structure. Venting channels are uniformly arranged on the cylindrical wall of the cylindrical structure, and the venting channels penetrate the cylindrical wall in the axial direction and extend to the conical structure.

[0009] Alternatively, the cylindrical structure may include an end portion, a middle portion connected to the end portion, a scraper connected to the middle portion, and a transition portion connected to the scraper; wherein, The aperture at the end is the same as the aperture of the scraper and is larger than the aperture of the middle part. The aperture of the middle part gradually decreases from both ends toward the middle. The aperture of the transition part is smaller than the aperture of the middle part.

[0010] Alternatively, each venting channel may include a vent hole and a vent groove communicating with the vent hole, wherein... The air venting channel that runs sequentially from the end through the middle part and the scraper is a venting hole, and the air venting channel of the transition part is a venting groove.

[0011] Alternatively, the venting channel can be used to discharge gas that accumulates in the glue tube after repeated dispensing.

[0012] Alternatively, in another configuration, the gas accumulated in the hose is discharged from the hose sequentially along the vent groove and the vent hole.

[0013] Alternatively, the aperture of the venting channel is smaller than the wall thickness of the end portion, the middle portion, and the scraper, but larger than the wall thickness of the transition portion.

[0014] Alternatively, the diameter of the venting channel may be smaller than the thickness of the cylinder wall.

[0015] Alternatively, the hose may include a hose body, an outlet at one end of the hose body, and an inlet at the other end of the hose body.

[0016] Alternatively, the tube body is used to contain adhesive solder paste, and the outlet is used to dispense adhesive through the adhesive solder paste inside the tube body.

[0017] Alternatively, the conical structure of the plug applies force to the adhesive solder paste inside the tube body under the action of compressed gas, and the adhesive solder paste flows out from the outlet.

[0018] As can be seen from the above technical solution, the solder paste tube assembly provided by this utility model has a venting channel evenly provided on the cylindrical wall of the plug's cylindrical structure. The venting channel penetrates the cylindrical wall in the axial direction and extends to the conical structure. The gas accumulated in the tube is discharged along the venting channel, thereby solving the problem of increased packaging failure rate caused by the gas accumulating in the tube after repeated dispensing and forming a plug skip.

[0019] To achieve the foregoing and related objectives, one or more aspects of the present invention include the features that will be described in detail below. The following description and accompanying drawings illustrate certain exemplary aspects of the present invention. However, these aspects indicate only a few of the various ways in which the principles of the present invention can be used. Furthermore, the present invention is intended to include all such aspects and their equivalents. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1-1 , Figure 1-2 These are schematic diagrams of the solder paste tube assembly according to embodiments of the present utility model; Figure 2-1 , Figure 2-2 These are schematic diagrams of the plug structure according to Embodiment 1 of this utility model; Figure 3-1 , Figure 3-2 These are schematic diagrams of the plug structure according to Embodiment 2 of this utility model.

[0022] The reference numerals in the accompanying drawings include: 1. tubing, 11. inlet, 12. outlet, 13. body of the colloid, 2. plug, 21. vent hole, 22. scraper, 23. end, 24. conical structure, 25. middle part, 26. transition part, 27. vent groove.

[0023] In all the accompanying drawings, the same reference numerals indicate similar or corresponding features or functions. Detailed Implementation

[0024] In the following description, numerous specific details are set forth for illustrative purposes and to provide a thorough understanding of one or more embodiments. However, it will be apparent that these embodiments may also be implemented without these specific details. In other instances, well-known structures and devices are shown in block diagram form for ease of description of one or more embodiments.

[0025] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0026] This invention can be modified in various ways and has various embodiments, with specific embodiments illustrated in the accompanying drawings. However, this invention is not limited to this specific implementation and all modifications, equivalents, and substitutions falling within the spirit and technical scope of this invention are to be understood as included.

[0027] Ordinal terms such as "first," "second," etc., may be used to describe various constituent elements, but the constituent elements are not limited to these terms. The terms are used only to distinguish one constituent element from another. For example, without departing from the scope of the claims of this utility model, a second constituent element may be named a first constituent element, and similarly, a first constituent element may be named a second constituent element. Terms and / or include combinations of multiple associated items or one of multiple associated items.

[0028] It should be understood that when referring to a constituent element being "connected" or "in contact" with other constituent elements, this includes not only cases where it is directly connected or in contact with other constituent elements, but also cases where other constituent elements exist between them. Conversely, when referring to a constituent element being "directly connected" or "directly in contact" with other constituent elements, it should be understood that no other constituent elements exist between them.

[0029] In response to the aforementioned problem of increased encapsulation failure rate due to the accumulation of more and more gas in the tube after repeated dispensing, resulting in plugging, this utility model proposes a solder paste tube assembly.

[0030] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0031] To illustrate the solder paste tube assembly provided by this utility model, Figures 1-1 to 3-2 The specific structure of the solder paste tube assembly is illustrated from different perspectives in the embodiments. Specifically, Figure 1-1 , Figure 1-2Solder paste tube assemblies according to embodiments of the present invention are shown respectively; Figure 2-1 , Figure 2-2 The plug structures according to Embodiment 1 of this utility model are shown respectively; Figure 3-1 , Figure 3-2 The plug structures according to Embodiment 2 of this utility model are shown respectively.

[0032] like Figures 1-1 to 3-2 As shown in the figure, the solder paste tube assembly provided by this utility model mainly includes: a tube 1 and a plug 2 adapted to the tube 1. The plug 2 includes a cylindrical structure and a conical structure 24 connected to the cylindrical structure. Venting channels are uniformly arranged on the cylindrical wall of the cylindrical structure. The venting channels penetrate the cylindrical wall in the axial direction and extend to the conical structure 24.

[0033] In the embodiments of this utility model, multiple dispensings cause more and more gas to accumulate inside the dispensing tube. The gas is discharged from the inside of the dispensing tube along the venting channel set in the wall of the cylindrical structure, which solves the problems of gas accumulation and plug skipping from the root, ensuring the stability of the plug position, thereby ensuring the consistency and stability of the dispensing volume. It also avoids defects such as poor soldering and voids caused by unstable dispensing and air bubble injection, thereby improving the packaging quality and reliability of semiconductor devices and ensuring the yield of packaged products.

[0034] Specifically, the cylindrical structure includes an end portion 23, an intermediate portion 25 connected to the end portion 23, a scraper 22 connected to the intermediate portion 25, and a transition portion 26 connected to the scraper 22; the transition portion 26 is connected and fixed to the conical structure 24. The aperture of the end portion 23 is the same as the aperture of the scraper 22 and larger than the aperture of the intermediate portion 25. The aperture of the intermediate portion 23 gradually decreases from both ends towards the middle, and the aperture of the transition portion 26 is smaller than the aperture of the intermediate portion 25.

[0035] The radius of the cylindrical structure varies at different locations, designed to reduce frictional resistance during the dispensing process by assembling the stopper 2 and the tube 1 together. The adhesive / solder paste enters the tube 1 through the inlet 11. During dispensing, compressed gas acts on the stopper 2, which then acts along the inner wall of the tube 1, causing the adhesive / solder paste to flow out from the outlet 12. During dispensing, a scraper 22 scrapes off the adhesive from the inner wall of the tube 1, preventing it from sticking to the inner wall.

[0036] The venting channels are used to discharge gas that accumulates in the adhesive tube 1 after repeated dispensing. Each venting channel includes a vent hole 21 and a vent groove 27 connected to the vent hole 21. The vent hole 21 is the venting channel that runs from the end 23 through the middle part 25 and the scraper 23, while the vent groove 27 is the venting channel of the transition part 26. That is, the gas accumulated in the adhesive tube 1 is discharged from the adhesive tube 1 sequentially along the vent groove 27 and the vent hole 21, thereby preventing plugging.

[0037] It should be noted that the diameter of the venting channel is smaller than the thickness of the cylinder wall. More specifically, the diameter of the venting channel is smaller than the wall thickness of the end portion 23, the middle portion 25, and the scraper 22, but larger than the wall thickness of the transition portion 26. In practical applications, the diameter of the venting channel can be designed based on the wall thickness, as long as the diameter of the venting channel is smaller than the thickness of the cylinder wall.

[0038] Furthermore, it should be noted that the number of venting channels can be designed according to actual needs, such as two, three, four, or more. In practical applications, the venting channels can be evenly distributed on the cylinder wall of the plug 2 as needed.

[0039] Examples 1 and 2 show plug structures with different numbers of venting channels.

[0040] In Embodiment 1, as can be clearly seen from the top view, two venting channels are symmetrically arranged along the axial direction on the cylindrical structure of the plug 2. To reduce frictional resistance during the dispensing process, the radii of the cylindrical structure at different locations are not the same. Specifically, the aperture of the end 23 is the same as the aperture of the scraper 22 and larger than the aperture of the middle portion 25; the aperture of the middle portion 23 gradually decreases from both ends towards the middle; and the aperture of the transition portion 26 is smaller than the aperture of the middle portion 25. Therefore, in designing the venting channels, each venting channel is designed as a vent hole 21 and a vent groove 27 connected to the vent hole 21. The venting channel that passes sequentially from the end 23 through the middle portion 25 and the scraper 23 is the vent hole 21, and the venting channel of the transition portion 26 is the vent groove 27. In practical applications, after dispensing, the gas accumulated in the tube is discharged from the tube 1 in sequence through the vent groove 27 and vent hole 21 of the two venting channels, thereby preventing the gas from accumulating in the tube and causing the tube to stop.

[0041] In Embodiment 2, as can be clearly seen from the top view, four venting channels are provided along the axial direction on the cylindrical structure of the plug 2, and the four venting channels are evenly distributed. After dispensing, the gas accumulated in the tube is discharged from the tube 1 sequentially through the venting grooves 27 and venting holes 21 of the four venting channels, thereby preventing the gas from accumulating in the tube and causing the plug to jump.

[0042] The difference between Embodiment 1 and Embodiment 2 lies in the number of venting channels. Embodiment 1 has two venting channels, while Embodiment 2 has four. The structure of the venting channels in both embodiments is completely identical. Therefore, in specific applications, the specific number of venting channels can be set according to the implementation requirements, and no specific limitation is made here.

[0043] In the embodiments of this utility model, the vent hole is circular, but it can also be set as a rhombus, triangle, etc. as needed, and no specific limitation is made here.

[0044] In an embodiment of this utility model, the tubing 1 includes a tubing body 13, an outlet 12 disposed at one end of the tubing body 13, and an inlet 11 disposed at the other end of the tubing body 13. The tubing body 13 is used to contain adhesive solder paste, and the outlet 12 is used to discharge the adhesive solder paste from the tubing body for dispensing. The conical structure 24 of the stopper applies force to the adhesive solder paste within the tubing body 13 under the action of compressed gas, causing the adhesive solder paste to flow out from the outlet 12.

[0045] As can be seen from the above technical solution, the solder paste tube assembly provided by this utility model, by uniformly setting venting channels on the cylindrical wall of the plug's cylindrical structure, with the venting channels penetrating the cylindrical wall axially and extending to the conical structure, allows the gas accumulated in the solder paste tube to be discharged along the venting channels, fundamentally solving the problems of gas accumulation and plug jumping, ensuring the stability of the plug position, and thus ensuring the consistency and stability of the dispensing volume; it also avoids defects such as cold solder joints and voids caused by unstable dispensing and air bubble injection, thereby improving the packaging quality and reliability of semiconductor devices and ensuring the yield of packaged products.

[0046] The above are merely preferred embodiments of this utility model and do not limit the scope of protection of this utility model. For those skilled in the art, this utility model can have various modifications and variations. Any changes, modifications, substitutions, integrations, and parameter alterations made to these embodiments within the spirit and principles of this utility model, through conventional substitutions or methods that achieve the same function without departing from the principles and spirit of this utility model, fall within the scope of protection of this utility model.

Claims

1. A solder paste tube assembly, comprising a tube and a stopper adapted to the tube, the stopper comprising a cylindrical structure and a tapered structure connected to the cylindrical structure, characterized in that, Venting channels are uniformly arranged on the cylindrical wall of the cylindrical structure, and the venting channels penetrate the cylindrical wall in the axial direction and extend to the conical structure.

2. The solder paste tubing assembly according to claim 1, characterized in that, The cylindrical structure includes an end portion, a middle portion connected to the end portion, a scraper connected to the middle portion, and a transition portion connected to the scraper; wherein, The aperture at the end is the same as the aperture of the scraper and is larger than the aperture of the middle part. The aperture of the middle part gradually decreases from both ends toward the middle. The aperture of the transition part is smaller than the aperture of the middle part.

3. The solder paste tubing assembly according to claim 2, characterized in that, Each venting channel includes a vent hole and a vent groove communicating with the vent hole, wherein, The air venting channel that runs sequentially from the end through the middle part and the scraper is a venting hole, and the air venting channel of the transition part is a venting groove.

4. The solder paste tubing assembly according to claim 3, characterized in that, The venting channel is used to release the gas that accumulates in the glue tube after repeated dispensing.

5. The solder paste tubing assembly according to claim 3, characterized in that, The gas that accumulates in the hose is discharged from the hose sequentially through the vent groove and the vent hole.

6. The solder paste tubing assembly according to claim 3, characterized in that, The diameter of the venting channel is smaller than the wall thickness of the end portion, the middle portion, and the scraper, but larger than the wall thickness of the transition portion.

7. The solder paste tubing assembly according to claim 1, characterized in that, The diameter of the venting channel is smaller than the thickness of the cylinder wall.

8. The solder paste tubing assembly according to claim 1, characterized in that, The hose includes a hose body, an outlet at one end of the hose body, and an inlet at the other end of the hose body.

9. The solder paste tubing assembly according to claim 8, characterized in that, The tube body is used to contain adhesive and solder paste, and the outlet is used to dispense adhesive through the adhesive and solder paste inside the tube body.

10. The solder paste tubing assembly according to claim 9, characterized in that, The conical structure of the plug applies force to the adhesive solder paste inside the tube body under the action of compressed gas, and the adhesive solder paste flows out from the outlet.

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