Dispensing head capable of easily controlling glue amount
By using the design of a regular octagonal rubber-output channel and a V-shaped diverter groove in the dispensing head, and using the vertical and inclined rubber-guided surface structure, the problem of uneven flow of sintered silver rubber in the traditional dispensing head is solved, and the amount of glue is easy to control.
Patent Information
- Application Number
- CN202421554330.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-02
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-07-02
AI Technical Summary
The circular cross-section of the rubber-output channel of the traditional dispensing head causes the circumferential rotation of the sintered silver glue in the rubber-output channel, resulting in uneven rubber-output and difficult to control the rubber-output.
Using a rubber-output channel with a regular octagonal cross-section and a flow-output channel with a V-shaped cross-section, the circumferential inner wall of the rubber-output channel forms eight annularly distributed vertical rubber-guiding surfaces. The inner wall of each flow-output channel forms two oppositely arranged inclined rubber-guiding surfaces, and the inclined rubber-guiding surfaces correspond one by one to the vertical rubber-guiding surfaces and are perpendicular to each other.
The vertical guide surface limits the circumferential rotation of the sintered silver glue, so that it flows smoothly downward in a straight line. The inclined guide surface transitions vertically with the vertical guide surface to ensure that the sintered silver glue is uniformly output to the diverter groove, and the amount of glue is easy to control.
Smart Images
Figure CN223027672U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of chip packaging, and particularly relates to a dispensing head with easy glue volume control. Background Art
[0002] In the process of semiconductor packaging production, a dispensing device is usually required for dispensing. Among them, the dispensing head is an important component on the dispensing device. In a traditional dispensing head, a glue outlet channel and an X-shaped flow groove are provided. The four shunt grooves on the X-shaped flow groove are all communicated with the glue outlet channel. During dispensing, the lower end face of the dispensing head abuts against the base island of the lead frame. The sintered silver glue is output from the glue outlet channel to the X-shaped flow groove and adheres to the base island, and then the chip is welded to the base island through the sintered silver glue. Since the cross-section of the traditional glue outlet channel is circular, the sintered silver glue will have a circumferential rotation problem during the flow in the glue outlet channel, resulting in a large difference in the glue output volume from the glue outlet channel to the four shunt grooves, and the glue volume is not easy to control. Content of the Utility Model
[0003] Aiming at the deficiencies of the existing technology, the utility model provides a dispensing head with easy glue volume control. It adopts a glue outlet channel with a regular octagon cross-section and a shunt groove with a V-shaped cross-section, which can avoid the circumferential rotation of the sintered silver glue in the glue outlet channel, so as to evenly output to the four shunt grooves, and the glue volume is easy to control.
[0004] To achieve the above object, the utility model adopts the following technical solutions:
[0005] A dispensing head with easy glue volume control includes a dispensing head body. A vertically extending glue outlet channel is arranged in the dispensing head body. A dispensing part is arranged at the lower end of the dispensing head body. An X-shaped flow groove is concavely arranged on the lower end face of the dispensing part. The X-shaped flow groove has four shunt grooves arranged around the glue outlet channel. One end of each of the four shunt grooves is communicated with the glue outlet channel. The cross-section of the glue outlet channel is in the shape of a regular octagon. Eight annularly distributed vertical glue guiding surfaces are formed on the circumferential inner side wall of the glue outlet channel. The cross-section of the shunt groove is in the shape of a V. Two oppositely arranged inclined glue guiding surfaces are formed on the inner side wall of each shunt groove. The inclined glue guiding surfaces correspond to the vertical glue guiding surfaces one by one and are perpendicular to each other. The edge of the inclined glue guiding surface close to the glue outlet channel extends to the vertical glue guiding surface.
[0006] By adopting a glue outlet channel with a regular octagon cross-section and a flow dividing groove with a V-shaped cross-section, eight vertically distributed glue guiding surfaces are formed on the circumferential inner wall of the glue outlet channel in a circular distribution. Two oppositely arranged inclined glue guiding surfaces are formed on the inner wall of each flow dividing groove. The inclined glue guiding surfaces correspond to the vertical glue guiding surfaces one by one and are perpendicular to each other. The edge of the inclined glue guiding surface near the glue outlet channel extends to the vertical glue guiding surface. During the dispensing process, the vertical glue guiding surfaces in the glue outlet channel restrict the circumferential rotation of the sintered silver glue, enabling the sintered silver glue to flow smoothly downward in a straight line. The inclined glue guiding surfaces correspond to the vertical glue guiding surfaces one by one and are perpendicular to each other, allowing the outermost sintered silver glue to smoothly transition from the vertical glue guiding surface to the inclined glue guiding surface, thereby enabling the glue outlet channel to evenly output the sintered silver glue to the four flow dividing grooves, and the glue volume is easy to control.
[0007] As a preferred solution, the width b1 of two adjacent vertical glue guiding surfaces along the radial direction of the glue outlet channel > the width b2 of the flow dividing groove, such that two adjacent flow dividing grooves are separated by a tip, and the tip is formed by connecting two adjacent vertical glue guiding surfaces.
[0008] As a preferred solution, the diameter d of the glue outlet channel is 0.25 mm - 0.3 mm.
[0009] As a preferred solution, the width b2 of the flow dividing groove is 0.1 mm - 0.2 mm, and the depth h of the flow dividing groove is 0.15 mm - 0.25 mm.
[0010] As a preferred solution, the included angle β1 between the two inclined glue guiding surfaces in the flow dividing groove is 42 - 47 degrees.
[0011] As a preferred solution, the included angle β2 between two adjacent flow dividing grooves is 90 degrees.
[0012] As a preferred solution, the end of the flow dividing groove far from the glue outlet channel penetrates through the circumferential outer wall of the dispensing part.
[0013] As a preferred solution, the cross-section of the dispensing part is rectangular.
[0014] As a preferred solution, the length a of the dispensing part is 1.3 mm, and the width b3 of the dispensing part is 1.1 mm.
[0015] As a preferred solution, a connecting part is provided at the upper end of the dispensing head body. The connecting part is threadedly connected with an installation sleeve, and the installation sleeve is threadedly connected to the dispensing device. A first glue storage groove is provided in the installation sleeve, a second glue storage groove is provided in the connecting part, and the first glue storage groove, the second glue storage groove, the glue outlet channel, and the X-shaped flow groove are sequentially communicated.
[0016] The utility model has obvious advantages and beneficial effects compared with the prior art. Specifically, by adopting a glue outlet channel with a regular octagon cross-section and a diversion groove with a V-shaped cross-section, eight annularly distributed vertical glue guiding surfaces are formed on the circumferential inner side wall of the glue outlet channel, and two oppositely arranged inclined glue guiding surfaces are formed on the inner side wall of each diversion groove. The inclined glue guiding surfaces correspond to the vertical glue guiding surfaces one by one and are perpendicular to each other. The edge of the inclined glue guiding surface near the glue outlet channel extends to the vertical glue guiding surface. During the dispensing process, the vertical glue guiding surfaces in the glue outlet channel restrict the circumferential rotation of the sintered silver glue, enabling the sintered silver glue to flow smoothly downward in a straight line. The inclined glue guiding surfaces correspond to the vertical glue guiding surfaces one by one and are perpendicular to each other, allowing the outermost layer of sintered silver glue to smoothly transition from the vertical glue guiding surface to the inclined glue guiding surface, so that the glue outlet channel evenly outputs the sintered silver glue to the four diversion grooves, and the glue volume is easy to control.
[0017] To more clearly elaborate on the structural features, technical means, and the specific purposes and functions achieved by the utility model, the following further detailed description of the utility model will be given in conjunction with the accompanying drawings and specific embodiments: BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 is a schematic assembly structure diagram of an embodiment of the utility model;
[0019] Figure 2 is a schematic structure diagram of the dispensing head body of an embodiment of the utility model;
[0020] Figure 3 is a cross-sectional view of the dispensing head body of an embodiment of the utility model;
[0021] Figure 4 is a schematic structure diagram of the dispensing part of an embodiment of the utility model;
[0022] Figure 5 is a bottom view of the dispensing part of an embodiment of the utility model;
[0023] Figure 6 is a schematic cross-sectional view of the dispensing part of an embodiment of the utility model.
[0024] DESCRIPTION OF THE REFERENCE NUMERALS:
[0025] 10 - dispensing head body; 11 - dispensing part; 12 - glue outlet channel; 121 - vertical glue guiding surface; 122 - tip; 13 - X-shaped flow groove; 14 - diversion groove; 141 - inclined glue guiding surface; 15 - connecting part; 151 - second glue storage tank; 16 - mounting sleeve. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0026] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the position or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.
[0027] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0028] As Figure 1-6 shown, the present utility model discloses a dispensing head with easy glue amount control, which includes a dispensing head body 10. The dispensing head body 10 is formed of tungsten alloy material. A glue outlet channel 12 extending vertically is provided inside the dispensing head body 10. A dispensing part 11 is provided at the lower end of the dispensing head body 10. An X-shaped flow groove 13 is recessed on the lower end surface of the dispensing part 11. The X-shaped flow groove 13 has four diversion grooves 14 arranged around the glue outlet channel 12. One end of each of the four diversion grooves 14 is communicated with the glue outlet channel 12.
[0029] The cross-section of the glue outlet channel 12 is in a regular octagon shape. Eight annularly distributed vertical glue guiding surfaces 121 are formed on the circumferential inner side wall of the glue outlet channel 12. The cross-section of the diversion groove 14 is in a V shape. Two oppositely arranged inclined glue guiding surfaces 141 are formed on the inner side wall of each diversion groove 14. The inclined glue guiding surfaces 141 and the vertical glue guiding surfaces 121 correspond one by one and are perpendicular to each other. The edge of the inclined glue guiding surface 141 near one end of the glue outlet channel 12 extends to the vertical glue guiding surface 121.
[0030] The width b1 of two adjacent vertical glue guiding surfaces 121 along the radial direction of the glue outlet channel 12 is greater than the width b2 of the shunt grooves 14, such that two adjacent shunt grooves 14 are separated by a pointed portion 122, and the pointed portion 122 is formed by connecting two adjacent vertical glue guiding surfaces 121; by setting the width b1 of two vertical glue guiding surfaces 121 along the radial direction of the glue outlet channel 12 to be greater than the width b2 of the shunt grooves 14, two adjacent shunt grooves 14 are separated by a pointed portion 122 formed by connecting two adjacent vertical glue guiding surfaces 121. When the sintered silver glue is shunted from the glue outlet channel 12 to the four shunt grooves 14, the flow of the sintered silver glue at one end of two adjacent shunt grooves 14 close to the glue outlet channel 12 does not affect each other, so that the amount of glue in the shunt grooves 14 is easy to control.
[0031] The diameter d of the glue outlet channel 12 is 0.25 mm - 0.3 mm, and preferably the diameter d is 0.27 mm; by adopting the glue outlet channel 12 with a diameter of 0.25 mm - 0.3 mm, the flow rate of the sintered silver glue in the glue outlet channel 12 is very small, and it is easy to control the accuracy of the glue amount.
[0032] The width b2 of the shunt grooves 14 is 0.1 mm - 0.2 mm, and preferably the width b2 is 0.16 mm. The depth h of the shunt grooves 14 is 0.15 mm - 0.25 mm, and preferably the depth h is 0.2 mm; by adopting the shunt grooves 14 with a width b2 of 0.1 mm - 0.2 mm and a depth h of 0.15 mm - 0.25 mm, the flow rate of the sintered silver glue in the shunt grooves 14 is very small, and it is easy to control the accuracy of the glue amount.
[0033] The included angle β1 between two inclined glue guiding surfaces 141 in the shunt grooves 14 is 42 - 47 degrees, and preferably the included angle α is 44.5 degrees.
[0034] The included angle β2 between two adjacent shunt grooves 14 is 90 degrees.
[0035] One end of the shunt groove 14 far from the glue outlet channel 12 penetrates through the circumferential outer wall of the dispensing part 11.
[0036] The cross-section of the dispensing part 11 is rectangular.
[0037] The length a of the dispensing part 11 is 1.3 mm, and the width b3 of the dispensing part 11 is 1.1 mm.
[0038] The upper end of the dispensing head body 10 is provided with a connecting portion 15. The connecting portion 15 is threadedly connected with an installation sleeve 16. The installation sleeve 16 is threadedly connected to a dispensing device (not shown). A first glue storage groove (not shown) is provided in the installation sleeve 16. A second glue storage groove 151 is provided in the connecting portion 15. The first glue storage groove, the second glue storage groove 151, the glue outlet channel 12 and the X-shaped flow groove 13 are communicated in sequence. Specifically, an external thread is provided on the connecting portion 15, and an internal thread that is screwed and connected with the external thread is provided on the installation sleeve 16. It can be understood that an internal thread can also be provided on the connecting portion 15, and an external thread is correspondingly provided on the installation sleeve 16. By adopting the threaded connection method, the assembly and disassembly among the dispensing head body 10, the installation sleeve 16 and the dispensing device are convenient.
[0039] In summary, in the present utility model, by adopting the glue outlet channel 12 with a regular octagon cross-section and the shunt groove 14 with a V-shaped cross-section, eight annularly distributed vertical glue guiding surfaces 121 are formed on the circumferential inner side wall of the glue outlet channel 12. Two oppositely arranged inclined glue guiding surfaces 141 are formed on the inner side wall of each shunt groove 14. The inclined glue guiding surfaces 141 correspond to the vertical glue guiding surfaces 121 one by one and are perpendicular to each other. The edge of the inclined glue guiding surface 141 near one end of the glue outlet channel 12 extends to the vertical glue guiding surface 121. During the dispensing process, the vertical glue guiding surfaces 121 in the glue outlet channel 12 restrict the circumferential rotation of the sintered silver glue, enabling the sintered silver glue to flow smoothly downward in a straight line. The inclined glue guiding surfaces 141 correspond to the vertical glue guiding surfaces 121 one by one and are perpendicular to each other, so that the outermost sintered silver glue is smoothly connected when transitioning from the vertical glue guiding surface 121 to the inclined glue guiding surface 141. Thus, the glue outlet channel 12 evenly outputs the sintered silver glue to the four shunt grooves 14, and the glue volume is easy to control.
[0040] The above is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Therefore, any modifications, equivalent replacements, improvements, etc. made to the above embodiments according to the technical reality of the present utility model still fall within the scope of the technical solution of the present utility model.
Claims
1. A dispensing head with easy-to-control glue quantity, comprising a dispensing head body, a vertically extending glue outlet channel is arranged in the dispensing head body, a dispensing portion is arranged at the lower end of the dispensing head body, an X-shaped flow groove is concavely arranged at the lower end surface of the dispensing portion, the X-shaped flow groove has four diverter grooves arranged around the glue outlet channel, one end of the four diverter grooves are connected to the glue outlet channel, and the characteristics are: The cross-section of the glue outlet channel is set in a regular octagon, and the circumferential inner wall of the glue outlet channel is formed with eight annularly distributed vertical glue guiding surfaces. The cross-section of the diverter groove is set in a V-shape, and the inner wall of each diverter groove is formed with two relatively arranged inclined glue guiding surfaces, the inclined glue guiding surfaces correspond to the vertical glue guiding surfaces one by one and are perpendicular to each other, and the edge of the inclined glue guiding surface close to one end of the glue outlet channel extends to the vertical glue guiding surface.
2. The glue dispensing head with easily controllable glue amount according to claim 1, characterized in that: The width b1 of two adjacent vertical rubber guiding surfaces along the radial direction of the rubber outlet channel is greater than the width b2 of the diverter groove, so that the two adjacent diverter grooves are separated by a tip, and the tip is formed by connecting the two adjacent vertical rubber guiding surfaces.
3. The glue dispensing head with easily controllable glue amount according to claim 1, characterized in that: The diameter d of the glue outlet channel is 0.25 mm-0.3 mm.
4. The glue dispensing head with easily controllable glue amount according to claim 1, characterized in that: The width b2 of the diverter groove is 0.1 mm-0.2 mm, and the depth h of the diverter groove is 0.15 mm-0.25 mm.
5. The glue dispensing head with easily controllable glue amount according to claim 1, characterized in that: The included angle β1 between the two inclined rubber-conducting surfaces in the diverter groove is 42-47 degrees.
6. The glue dispensing head with easily controllable glue amount according to claim 1, characterized in that: The included angle β2 between two adjacent diverter grooves is 90 degrees.
7. The glue dispensing head with easily controllable glue amount according to claim 1, characterized in that: One end of the diverter groove away from the glue outlet channel penetrates through the circumferential outer side wall of the glue dispensing portion.
8. The glue dispensing head with easily controllable glue amount according to claim 1, characterized in that: The cross section of the glue dispensing portion is arranged in a rectangular shape.
9. The glue dispensing head with easily controllable glue amount according to claim 8, characterized in that: The length a of the glue dispensing portion is 1.3 mm, and the width b3 of the glue dispensing portion is 1.1 mm.
10. The glue dispensing head with easily controllable glue amount according to any one of claims 1 to 9, characterized in that: A connecting portion is provided at the upper end of the dispensing head body, and a mounting sleeve is threadedly connected to the connecting portion. The mounting sleeve is threadedly connected to the dispensing equipment, a first glue storage tank is provided in the mounting sleeve, and a second glue storage tank is provided in the connecting portion. The first glue storage tank, the second glue storage tank, the glue outlet channel and the X-shaped flow groove are connected in sequence.