A dip-glue needle
By designing a glue-dipping needle, a permanent magnet core and an electromagnetic coil are used to drive the valve core, achieving a sealed transfer of the glue solution. This solves the problems of silver paste overflow and glue spillage, improving the functionality and reliability of the product.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIEJIE SEMICON CO LTD
- Filing Date
- 2025-07-10
- Publication Date
- 2026-06-26
AI Technical Summary
During the high-frequency reciprocating motion of existing glue-dipping needles, silver paste is prone to overflow and splashing, which endangers the functionality and reliability of the product.
A glue-dipping needle is used, which includes a housing, a valve core and a drive assembly. Through the cooperation of a permanent magnet core and an electromagnetic coil, the valve core moves under closed conditions to control the filling and sealing of the glue, and to prevent glue from overflowing and splashing.
Transferring adhesive under relatively closed conditions improves the functionality and reliability of the product, avoids adhesive spillage and splashing defects, and ensures the normal and safe use of the product.
Smart Images
Figure CN224405558U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of semiconductor technology, specifically to a glue-dipping needle. Background Technology
[0002] In the semiconductor industry, silver paste is often applied using a dispensing needle to bond devices. For example, a dispensing needle can be used to apply silver paste to fix a chip onto a frame substrate to achieve the corresponding function. Existing dispensing needles mainly rely on the adhesive force of the silver paste itself to adhere to the needle tip. During the high-frequency reciprocating motion of the dispensing needle, defects such as silver paste overflow and splashing may occur, jeopardizing the functionality and reliability of the product and posing a threat to the normal and safe use of the device. Utility Model Content
[0003] The purpose of this application is to provide a glue-dipping needle that can transfer adhesive under relatively closed conditions, thereby improving the functionality and reliability of the product.
[0004] In one aspect of this application, a glue-dispensing needle is provided, including a housing with a chamber formed therein. The chamber has an opening, and a valve core and a drive assembly connected to the valve core are disposed within the chamber. The drive assembly is used to drive the valve core to move in a first direction so that the end of the valve core passes through the opening. Glue enters the chamber through the opening, and the end of the valve core is engaged with the opening when passing through it, thereby sealing the chamber to accommodate the glue.
[0005] Optionally, the drive assembly includes a permanent magnet core disposed inside the valve core and an electromagnetic coil sleeved outside the valve core. The electromagnetic coil is used to connect to a power source for energizing and to drive the valve core to move along the first direction through the permanent magnet core.
[0006] Optionally, the permanent magnet core has an S pole facing the opening and an N pole away from the opening, so that the valve core moves toward or away from the opening.
[0007] Optionally, the end of the valve core extending out of the opening forms a conical end. When the conical end extends out of the opening, a portion of the conical end is stuck in the opening, so that the chamber forms a sealed chamber.
[0008] Optionally, the housing has a head, the opening is located at the head, and the chamber forms a hemispherical cavity at the head position, the hemispherical cavity being used to contain the adhesive liquid dipped by the adhesive needle.
[0009] Optionally, a limiting structure is formed on the valve core, the setting direction of the limiting structure is perpendicular to the first direction, and the limiting structure is used to limit the movement stroke of the valve core along the first direction.
[0010] Optionally, a valve seat is further provided inside the housing, and a through hole is formed on the valve seat for the valve core to pass through. Along the setting direction of the limiting structure, the size of the limiting structure is larger than the size of the through hole, and the valve seat limits the valve core to the lower stop position.
[0011] Optionally, the end of the electromagnetic coil facing the opening forms a blocking end, and the size of the blocking end is larger than the size of the limiting structure along the setting direction of the limiting structure, so that the electromagnetic coil limits the valve core to the upper stop position.
[0012] Optionally, the housing has two interfaces, and the electromagnetic coil is connected to a power source through the two interfaces to be energized.
[0013] Optionally, the surface finish of the conical end of the valve core is greater than or equal to 0.6.
[0014] The adhesive dispensing needle provided in this application allows adhesive to be poured into a chamber through an opening. When the valve core passes through the opening, it can block the opening, at which point the chamber becomes a sealed chamber, and the adhesive is stored inside. The dispensing needle, carrying the adhesive sealed inside the chamber, is transferred to the target position. At this time, the drive assembly drives the valve core to return to its reverse position, opening the opening of the sealed chamber and returning the chamber to the open state. The adhesive stored in the chamber can then be dripped onto the target position. By setting the valve core to move in a first direction, the chamber can be switched between open and sealed states. When the chamber is open, adhesive is poured into it; when the chamber is sealed, the adhesive is sealed inside. This prevents adhesive from overflowing or splashing during transfer, thus avoiding defects such as adhesive spillage that could jeopardize the functionality and reliability of the product. Therefore, the adhesive dispensing needle of this application can achieve adhesive transfer under relatively sealed conditions, thereby improving the functionality and reliability of the product. Attached Figure Description
[0015] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0016] Figure 1 This is a schematic diagram of the adhesive dispensing needle structure provided in the embodiments of this application;
[0017] Figure 2 This is a schematic diagram of the valve core and permanent magnet core mating structure of the adhesive dispensing needle provided in the embodiments of this application;
[0018] Figure 3This is a schematic diagram of the working principle of the electromagnetic coil and permanent magnet core of the glue-dipped needle provided in the embodiments of this application;
[0019] Figure 4 This is a schematic diagram of the force on the permanent magnet core of the glue-dipping needle provided in the embodiments of this application;
[0020] Figure 5 This is a schematic diagram of the open state of the hemispherical cavity of the adhesive dispensing needle provided in the embodiments of this application;
[0021] Figure 6 This is a schematic diagram of the hemispherical shape of the adhesive-dipped needle in the embodiment of this application, representing the state of cavity sealing.
[0022] Figure 7 This is a diagram showing the state of adhesive droplets taken by the adhesive needle and placed on the surface of the frame base island, as provided in the embodiments of this application.
[0023] Figure 8 This is a diagram showing the state of the adhesive solution applied to the frame base island surface by the adhesive needle provided in this application embodiment.
[0024] Icons: 10-Housing; 101-Cavity; 102-Hemispherical cavity; 103-Opening; 11-Valve core; 110-Conical head end; 111-Limiting structure; 12-Permanent magnet core; 13-Electromagnetic coil; 130-Blocking end; 14-Valve seat; 15-Interface; 20-Power supply; 21-Adhesive; 22-Frame base island; F1-First direction; F2-Upward force; F3-Downward force; F4-Setting direction; A1-Upper stop; A2-Lower stop; B1-Open state; B2-Sealed state. Detailed Implementation
[0025] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.
[0026] In the description of this application, it should be noted that the terms "inner" and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and for 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 application. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0027] It should also be noted that, unless otherwise explicitly specified and limited, the terms "setup" and "connection" 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 direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0028] Please refer to Figure 1 As shown, this application provides a glue-dispensing needle, including: a housing 10, a chamber 101 formed inside the housing 10, the chamber 101 having an opening 103, a valve core 11 disposed inside the chamber 101 and a drive assembly connected to the valve core 11, the valve core 11 being disposed along a first direction F1, the drive assembly being used to drive the valve core 11 to move along the first direction F1 so that the end of the valve core 11 passes through the opening 103; glue 21 enters the chamber 101 through the opening 103, and when the end of the valve core 11 passes through the opening 103, it has a state of being engaged with the opening 103, so that the chamber 101 is sealed to accommodate the glue 21.
[0029] The housing 10 has a chamber 101 and an opening 103. A drive assembly and a valve core 11 are disposed within the chamber 101. The drive assembly drives the valve core 11 to move along a first direction F1 to approach the opening 103, allowing the valve core 11 to pass through the opening 103. Adhesive 21 is poured into the chamber 101 through the opening 103. When the valve core 11 passes through the opening 103, it blocks the opening 103, at which point the chamber 101 becomes a sealed chamber 101, and the adhesive 21 is stored within it. A dispensing needle, carrying the adhesive 21 sealed within the chamber 101, is transferred to the target position. At this time, the drive assembly drives the valve core 11 to return to its original position, opening the opening 103 of the sealed chamber 101, and the chamber 101 returns to the open state B1. The adhesive 21 stored in the chamber 101 can then be dripped onto the target position.
[0030] By setting the valve core 11 to move along the first direction F1, the chamber 101 can be switched between open and sealed states. When the chamber 101 is open, the adhesive 21 is poured into the chamber 101. After the chamber 101 is sealed, the adhesive 21 is sealed inside the chamber 101. In this way, when the sealed chamber 101 is transferred with the adhesive 21, defects such as overflow and splashing of adhesive 21 can be avoided, which would endanger the functionality and reliability of the product. Therefore, the adhesive needle of this application can realize the transfer of adhesive 21 under relatively closed conditions, thereby improving the functionality and reliability of the product.
[0031] Specifically, the drive assembly includes a permanent magnet core 12 disposed inside the valve core 11 and an electromagnetic coil 13 sleeved outside the valve core 11. The electromagnetic coil 13 is used to connect to the power supply 20 for energization and drive the valve core 11 to move along the first direction F1 through the permanent magnet core 12.
[0032] like Figure 2 As shown, the permanent magnet core 12 is located inside the valve core 11. For example, the permanent magnet core 12 has an S pole in the direction of the opening 103 and an N pole in the direction away from the opening 103, so that the valve core 11 can move toward or away from the opening 103.
[0033] Accordingly, two interfaces 15 are formed on the housing 10, and the electromagnetic coil 13 is connected to the power supply 20 through the two interfaces 15 to be energized.
[0034] In one embodiment, such as Figure 3 , Figure 4 As shown, the electrical signal of the power supply 20 signal line interface 15 comes from the PLC industrial control system, providing +5V and -5V power supply 20. When the +5V power supply 20 passes through the electromagnetic coil 13, it generates an electromagnetic field S / N. When the -5V power supply 20 passes through the electromagnetic coil 13, it generates an electromagnetic field N / S. The permanent magnet core 12 (S / N) and the magnetic field generated by the electromagnetic coil 13 are in the same or opposite directions. According to the principle that like poles repel and unlike poles attract, the valve core 11 will be subjected to an upward force F2 or a downward force F3 in the working state, causing the valve core 11 to move upward or downward along the first direction F1. When the valve core 11 moves downward along the first direction F1 and blocks the opening 103 of the housing 10, the chamber 101 becomes a sealed chamber 101. When the valve core 11 moves upward along the first direction F1 and opens the opening 103, the chamber 101 can be filled with adhesive 21, which is generally silver paste.
[0035] Furthermore, the end of the valve core 11 that extends out of the opening 103 forms a conical end 110. When the conical end 110 extends out of the opening 103, part of the conical end 110 is stuck at the opening 103, so that the chamber 101 forms a sealed chamber 101.
[0036] like Figure 5 , Figure 6 As shown, the valve core 11 has a conical head at the end. The conical head end 110 is used to engage with the opening 103 of the housing 10. The conical head end 110 moves downward along the first direction F1, passes through the opening 103 for a certain distance, and then engages at the opening 103. In this way, the chamber 101 forms a sealed chamber 101, which can be used to seal the adhesive 21 in the chamber 101 to prevent the adhesive 21 from dripping out when it is transferred. At this time, the chamber 101 is in a sealed state B2.
[0037] In addition, the housing 10 has a housing head, an opening 103 located at the housing head, and a chamber 101 forming a hemispherical cavity 102 at the housing head position. The conical end 110 of the valve core 11 is located inside the hemispherical cavity 102, which is used to contain the adhesive liquid 21 dipped by the adhesive needle.
[0038] The hemispherical cavity 102 can hold a larger amount of adhesive 21, and after the adhesive 21 is dripped from the hemispherical cavity 102 into the target position, it can also form a hemispherical adhesive 21 at the target position. Sufficient adhesive 21 can firmly connect the chip and the frame base island 22.
[0039] The housing 10 is also provided with a valve seat 14 that cooperates with the valve core 11. The valve seat 14 is located near the opening 103 of the housing 10. The valve core 11 passes through the valve seat 14. A through hole is formed on the valve seat 14 for the valve core 11 to pass through. The valve core 11 moves along the first direction F1 through the through hole. The through hole provides a guiding function for the movement of the valve core 11 and prevents the valve core 11 from deviating.
[0040] Furthermore, a limiting structure 111 is formed on the valve core 11. The setting direction F4 of the limiting structure 111 is perpendicular to the first direction F1. The limiting structure 111 is used to limit the movement stroke of the valve core 11 along the first direction F1.
[0041] The limiting structure 111 is arranged laterally. Specifically, the limiting structure 111 is a limiting stop bar. Along the setting direction F4 of the limiting structure 111, that is, in the lateral direction, the size of the limiting stop bar is larger than the size of the through hole. In this way, when the valve core 11 moves downward, because the size of the limiting stop bar is larger than the size of the through hole, the limiting stop bar cannot pass through the through hole and is blocked above the through hole, thus restricting the valve core 11 from continuing to move downward. Here, the limiting stop bar is blocked above the through hole, and the valve seat 14 limits the valve core 11 to the lower stop position A2. Figure 6 As shown.
[0042] Conversely, when the valve core 11 moves upward along the first direction F1, the end of the electromagnetic coil 13 facing the opening 103 forms a blocking end 130. Along the setting direction F4 of the limiting structure 111, the size of the blocking end 130 is larger than the size of the limiting structure 111. The limiting stop is blocked by the electromagnetic coil 13, and the electromagnetic coil 13 limits the valve core 11 to the upper stop position A1. Figure 5 As shown. The movement stroke of the valve core 11 along the first direction F1 is between the upper stop position A1 and the lower stop position A2.
[0043] The outer surface finish of the conical end 110 of the valve core 11 is required to be high, Ra>0.6; it is required that no adhesive 21 adheres to it; the finish of the conical end 110 of the valve core 11 can be achieved through material selection and high-precision machining.
[0044] In summary, the adhesive dispensing needle provided in this application uses a closed chamber 101. By repeatedly switching between +5V and -5V voltages of a pair of electromagnetic coils 13 and a permanent magnet core 12, the adhesive liquid 21 in the chamber 101 can move under relatively closed conditions, effectively preventing the adhesive liquid 21 from overflowing or splashing; avoiding contamination of the frame material surface and the product surface, thereby improving the product process and product reliability.
[0045] When using, such as Figure 5 As shown, the glue-dipping needle moves above the glue cup to prepare for glue dipping. The PLC industrial control system applies a +5V voltage to interface 15, and the permanent magnet core 12 moves upward to the upper stop point. The hemispherical cavity 102 opens and is in the open state B1, ready to be filled with glue 21. The glue-dipping needle moves downward into the glue 21, and the glue 21 is poured into the hemispherical cavity 102, which is fully filled with glue 21.
[0046] like Figure 6 As shown, the PLC industrial control system applies a -5V voltage to interface 15. The permanent magnet core 12 is subjected to force, causing the valve core 11 to move downwards until the hemispherical cavity 102 closes, entering a sealed state B2. Sufficient adhesive 21 is injected into this sealed hemispherical cavity 102. The adhesive dispensing needle, carrying the adhesive 21 from the sealed hemispherical cavity 102, transfers the entire assembly to the target location, for example... Figure 7 On the frame base island 22, the PLC industrial control system applies a +5V voltage to the interface 15. The permanent magnet core 12, under pressure, moves the valve core 11 upwards, opening the hemispherical cavity 102. Adhesive 21 drips onto the frame base island 22 at a predefined relative position. The adhesive 21 within the hemispherical cavity 102 is removed and transferred to the frame base island 22, forming a hemispherical adhesive 21. Figure 8 As shown; this completes one transfer of adhesive 21.
[0047] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.
Claims
1. A glue-dipping needle, characterized in that, Includes: a housing, wherein a chamber is formed within the housing, the chamber having an opening, a valve core and a drive assembly connected to the valve core are disposed within the chamber, the drive assembly being used to drive the valve core to move along a first direction so that an end of the valve core passes through the opening; The adhesive enters the chamber through the opening, and the end of the valve core is engaged with the opening when it passes through the opening, so that the chamber is sealed to contain the adhesive.
2. The adhesive-dipped needle according to claim 1, characterized in that, The drive assembly includes a permanent magnet core disposed inside the valve core and an electromagnetic coil sleeved outside the valve core. The electromagnetic coil is used to connect to a power source for energizing and to drive the valve core to move along the first direction through the permanent magnet core.
3. The adhesive-dipped needle according to claim 2, characterized in that, The permanent magnet core has an S pole facing the opening and an N pole away from the opening, so that the valve core can move toward or away from the opening.
4. The adhesive-dipped needle according to any one of claims 1 to 3, characterized in that, The end of the valve core extending out of the opening forms a conical head end. When the conical head end extends out of the opening, a portion of the conical head end is stuck in the opening, so that the chamber forms a sealed chamber.
5. The adhesive-dipped needle according to any one of claims 1 to 3, characterized in that, The shell has a head, the opening is located at the head, and the chamber forms a hemispherical cavity at the head position, the hemispherical cavity being used to contain the adhesive liquid dipped by the adhesive needle.
6. The adhesive-dipped needle according to any one of claims 2 to 3, characterized in that, A limiting structure is formed on the valve core, and the setting direction of the limiting structure is perpendicular to the first direction. The limiting structure is used to limit the movement stroke of the valve core along the first direction.
7. The adhesive-dipped needle according to claim 6, characterized in that, The housing is further provided with a valve seat, on which a through hole is formed for the valve core to pass through. Along the setting direction of the limiting structure, the size of the limiting structure is larger than the size of the through hole, and the valve seat limits the valve core to the lower stop position.
8. The adhesive-dipped needle according to claim 7, characterized in that, The end of the electromagnetic coil facing the opening forms a blocking end. Along the setting direction of the limiting structure, the size of the blocking end is larger than the size of the limiting structure. The electromagnetic coil limits the valve core to the upper stop position.
9. The adhesive-dipped needle according to any one of claims 2 to 3 and 7 to 8, characterized in that, The housing has two interfaces, and the electromagnetic coil is connected to the power source through the two interfaces to be energized.
10. The adhesive-dipped needle according to claim 4, characterized in that, The surface finish of the conical end of the valve core is greater than or equal to 0.6.