Dispensing head and dispensing device

Abstract

The utility model discloses a dispensing head and a dispensing device, which are applied to the technical field of chip packaging. The two side walls extend on the basis of the dispensing head body, and the groove with the rectangular opening is formed in the dispensing end face of the dispensing head body. The two side walls serve as blocking walls, when the silver paste is extruded out through the dispensing hole in the dispensing head body, the silver paste can be limited between the two side walls, the situation that the size of the silver paste is enlarged due to overflowing is avoided, and therefore the shape and size of the silver paste are limited. Silver paste is extruded into a shape close to a rectangle through the groove, the overflow distance of the rectangular silver paste is smaller than that of circular silver paste, and particularly under the conditions that a chip is closer to the edge of a frame and the chip is rectangular, the overflow of the silver paste can be effectively controlled, and the silver paste is prevented from overflowing to the edge of the frame in the soldering process; and the silver paste is prevented from overflowing to the back of the frame.

Description

Technical Field

[0001] The utility model relates to the technical field of chip packaging, in particular to a glue dispensing head and a glue dispensing device. Background Art

[0002] When packaging a chip, silver paste is usually used to solder the chip to the frame. During the soldering process, the silver paste 2 is first squeezed out of the frame 1 surface through the dispensing head. Since the internal structure of the dispensing head is a round hole, the shape of the squeezed silver paste 2 is round, and the fluidity of the silver paste 2 is difficult to control. The frame 1 is usually rectangular, which causes the silver paste 2 to easily overflow to the edge of the frame 1. Figure 1 When the chip 3 is combined with the silver paste 2 and attached to the frame 1, the chip 3 squeezes the silver paste 2, causing the silver paste 2 to spread further. In addition, the chip 3 is close to the edge of the frame 1, so the silver paste 2 is more likely to overflow to the edge of the frame 1, as shown in FIG. Figure 2 Therefore, it is necessary to provide a dispensing head to solve the problem that the existing dispensing head cannot effectively control the overflow of silver paste. Utility Model Content

[0003] In view of this, the purpose of the present invention is to provide a dispensing head and a dispensing device, which are used to solve the problem that the existing dispensing head cannot effectively control the overflow of silver paste.

[0004] In order to solve the above technical problems, the present utility model provides a dispensing head, including: a dispensing head body; a dispensing end face of the dispensing head body is provided with a groove, and the opening shape of the groove is rectangular; the groove includes two side walls, the side walls extend along the length direction of the groove, and are arranged opposite to each other along the width direction of the groove, and the two side walls surround to form the groove, and the groove passes through the dispensing head body in a direction parallel to the dispensing end face; a dispensing hole is provided inside the groove, and the dispensing hole passes through the dispensing head body.

[0005] Optionally, the groove is a semicircular arc groove; the semicircular arc groove includes two arc side walls; the arc side walls extend along the length direction of the semicircular arc groove and are relatively arranged along the width direction of the semicircular arc groove; the surface of one side of the arc side wall close to the inside of the semicircular arc groove is an arc surface.

[0006] Optionally, the dispensing hole is a circular hole.

[0007] Optionally, the diameter of the dispensing hole is the same as the width of the groove.

[0008] Optionally, at least two glue dispensing holes are provided inside the groove; and the glue dispensing holes are evenly arranged along the extension direction of the groove.

[0009] Optionally, the dispensing head further includes: a first connecting tube and a second connecting tube; the first connecting tube is provided with a first glue injection channel; the second connecting tube is provided with a second glue injection channel; the outer surface of the second connecting tube is provided with a thread;

[0010] One end of the dispensing head body facing away from the dispensing end face is connected to one end of the first connecting tube, and the other end of the first connecting tube is connected to the second connecting tube; the dispensing hole, the first injection channel and the second injection channel are connected in sequence.

[0011] Optionally, one end of the dispensing head body facing away from the dispensing end face is embedded in one end of the first connecting tube; the inner surface of the first connecting tube is provided with a thread; the other end of the first connecting tube is threadedly connected to one end of the second connecting tube.

[0012] Optionally, the length of the dispensing end surface is 0.59 mm to 0.61 mm, including the values at both ends;

[0013] The width of the dispensing end surface is 0.37 mm to 0.39 mm, including the values at both ends.

[0014] Optionally, the length of the groove is 0.59 mm to 0.61 mm, including both ends;

[0015] The width of the groove is 0.14 mm to 0.16 mm, inclusive;

[0016] The depth of the groove is 0.065 mm to 0.085 mm, inclusive.

[0017] In order to solve the above technical problems, the present invention also provides a dispensing device, including: the above dispensing head.

[0018] It can be seen that the present invention provides a dispensing head, comprising: a dispensing head body; a groove is provided on the dispensing end face of the dispensing head body, and the opening shape of the groove is rectangular; the groove includes two side walls, the side walls extend along the length direction of the groove, and are arranged oppositely along the width direction of the groove, the two side walls surround and form the groove, and the groove passes through the dispensing head body in a direction parallel to the dispensing end face; a dispensing hole is provided inside the groove, and the dispensing hole passes through the dispensing head body. The present invention extends two side walls on the basis of the dispensing head body, and forms a groove with a rectangular opening shape on the dispensing end face of the dispensing head body. The two side walls serve as blocking walls. When the silver paste is squeezed out through the dispensing hole inside the dispensing head body, it will be confined between the two side walls and will not overflow to expand the size of the silver paste, thereby achieving the limitation of the shape and size of the silver paste. The silver paste is squeezed into a shape close to a rectangle through the groove. The overflow distance of the rectangular silver paste is smaller than that of the circular silver paste. Especially when the chip is close to the edge of the frame and the chip is rectangular, the overflow of the silver paste can be effectively controlled, avoiding the risk of the silver paste overflowing to the edge of the frame during the soldering process, resulting in the risk of the silver paste overflowing to the back of the frame.

[0019] The utility model also provides a glue dispensing device, which adopts the glue dispensing head provided by the utility model and also has the above-mentioned beneficial effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0021] Figure 1 Schematic diagram of silver paste overflowing onto the edge of the frame after being squeezed out using a traditional dispensing head;

[0022] Figure 2 This is a diagram showing the overflow to the edge of the frame after soldering using a traditional dispensing head;

[0023] Figure 3 A side view of a dispensing head provided in an embodiment of the present utility model at the dispensing end face;

[0024] Figure 4 A partially enlarged view of a side view provided in an embodiment of the present utility model;

[0025] Figure 5 A front view of a dispensing head provided in an embodiment of the present utility model;

[0026] Figure 6A partially enlarged view of the front view provided by an embodiment of the utility model;

[0027] Figure 7 A schematic structural diagram of a dispensing head provided in an embodiment of the utility model;

[0028] Figure 8 This is a schematic diagram of the dispensing head provided by the embodiment of the utility model extruding silver paste without overflowing to the edge of the frame;

[0029] Figure 9 This is a schematic diagram of a dispensing head provided by an embodiment of the present invention after welding without overflowing to the edge of the frame.

[0030] The following are the descriptions of the reference numerals:

[0031] 1-frame; 2-silver paste; 3-chip; 4-dispensing head body; 41-groove; 42-dispensing hole; 5-first connecting tube; 51-first injection channel; 6-second connecting tube; 61-second injection channel; R-diameter of dispensing hole; L1-length of dispensing end face; L2-width of dispensing end face; L3-width of groove; L4-depth of groove. DETAILED DESCRIPTION

[0032] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0033] Please refer to Figures 3 to 6 , Figure 3 A side view of a dispensing head provided in an embodiment of the present utility model at the dispensing end face; Figure 4 A partially enlarged view of a side view provided in an embodiment of the present utility model; Figure 5 A front view of a dispensing head provided in an embodiment of the present utility model; Figure 6 This is a partially enlarged view of the front view provided by an embodiment of the present utility model.

[0034] A dispensing head provided by an embodiment of the present invention may include: a dispensing head body 4; a dispensing end face of the dispensing head body 4 is provided with a groove 41, and the opening shape of the groove 41 is rectangular; the groove 41 includes two side walls, the side walls extend along the length direction of the groove 41, and are arranged oppositely along the width direction of the groove 41, and the two side walls surround to form the groove 41, and the groove 41 passes through the dispensing head body 4 in a direction parallel to the dispensing end face; a dispensing hole 42 is provided inside the groove 41, and the dispensing hole 42 passes through the dispensing head body 4.

[0035] It should be noted that in this embodiment, the groove 41 is only formed by two side walls arranged opposite to each other along the width direction of the groove, and there are no side walls on both sides of the groove 41 along the length direction. The dispensing hole 42 in this embodiment is a glue injection channel inside the dispensing head body 4.

[0036] Furthermore, the groove 41 in this embodiment may be a semicircular groove 41; the semicircular groove 41 may include two arcuate sidewalls; the arcuate sidewalls may extend along the length direction of the semicircular groove 41 and be arranged opposite each other along the width direction of the semicircular groove 41; and the surface of the arcuate sidewalls adjacent to the interior of the semicircular groove 41 may be a curved surface. It should be noted that the semicircular groove 41 used in this embodiment is an integrated structure formed by connecting one side of the two arcuate sidewalls. The surface of the semicircular groove 41 is in a semicircular shape, and the silver paste 2 has better fluidity in the groove 41 of this shape.

[0037] This embodiment does not limit the specific shape of the dispensing hole 42. For example, the dispensing hole 42 can be a circular hole, an elliptical hole, or a hole of other shapes. It should be noted that in this embodiment, when the dispensing hole 42 is a circular hole, the fluidity of the silver paste 2 is better.

[0038] Furthermore, the diameter R of the dispensing hole in this embodiment can be the same as the width L3 of the groove. This embodiment does not limit the specific value of the diameter R of the dispensing hole. The specific value of the diameter R of the dispensing hole can be determined based on the actual size of the area where the silver paste 2 is to be dispensed. For example, the diameter R of the dispensing hole can be 0.37mm-0.39mm, including the values at both ends. It should be noted that the use of the largest dispensing hole 42 in this embodiment can improve the efficiency of injecting the silver paste 2 into the groove 41, so that the silver paste 2 can quickly fill the groove 41.

[0039] This embodiment does not limit the specific number of dispensing holes 42 provided inside the groove 41. The specific number of dispensing holes 42 provided inside the groove 41 can be determined based on the size of the area where the silver paste 2 is actually required to be dispensed. For example, when the size of the area where the silver paste 2 is actually required to be dispensed is small, the required size of the groove 41 is small, and one dispensing hole 42 can be provided inside the groove 41; when the size of the area where the silver paste 2 is actually required to be dispensed is large, the required size of the groove 41 is large, and at least two dispensing holes 42 can also be provided inside the groove 41. Further, when at least two dispensing holes 42 are provided inside the groove 41, the dispensing holes 42 in this embodiment can be evenly arranged along the extension direction of the groove 41. Further, at least two rows of dispensing holes 42 can be provided inside the groove 41 in this embodiment, and the dispensing holes 42 in each row can be evenly arranged along the extension direction of the groove 41. It should be noted that this embodiment can improve the efficiency of injecting silver paste 2 into the groove 41 by increasing the number of dispensing holes 42 and arranging the dispensing holes 42 evenly along the extension direction of the groove 41, so that the silver paste 2 can quickly fill the groove 41.

[0040] Furthermore, the dispensing head in this embodiment may also include: a first connecting tube 5 and a second connecting tube 6; a first glue injection channel 51 may be provided inside the first connecting tube 5; a second glue injection channel 61 may be provided inside the second connecting tube 6; the outer surface of the second connecting tube 6 may be provided with threads; the end of the dispensing head body 4 away from the dispensing end face may be connected to one end of the first connecting tube 5, and the other end of the first connecting tube 5 may be connected to the second connecting tube 6; the dispensing hole 42, the first glue injection channel 51 and the second glue injection channel 61 may be connected in sequence. It should be noted that this embodiment adds two connecting tubes on the basis of the dispensing head body 4, wherein the outer surface of the second connecting tube 6 is provided with threads, which can be used to connect to the glue injection device; the dispensing head body 4 and the second connecting tube 6 are connected into a whole through the first connecting tube 5, so that the glue hole, the first glue injection channel 51 and the second glue injection channel 61 are connected in sequence to form the entire glue injection channel, and the glue injection device injects the silver paste 2 into the glue injection channel.

[0041] This embodiment does not limit the specific connection method between the end of the dispensing head body 4 facing away from the dispensing end face and one end of the first connecting tube 5. It is sufficient that the end of the dispensing head body 4 facing away from the dispensing end face and one end of the first connecting tube 5 can be connected as a whole. For example, the end of the dispensing head body 4 facing away from the dispensing end face can be embedded in one end of the first connecting tube 5. This embodiment does not limit the specific connection method between the other end of the first connecting tube 5 and the second connecting tube 6. It is sufficient that the other end of the first connecting tube 5 and the second connecting tube 6 can be connected as a whole. For example, the inner surface of the first connecting tube 5 can be provided with threads; the other end of the first connecting tube 5 and one end of the second connecting tube 6 can be threadedly connected.

[0042] This embodiment does not limit the specific type of the dispensing head body 4. The dispensing head body 4 can be, but is not limited to, a tungsten steel dispensing head body 4. It should be noted that tungsten steel is a common material in the prior art. This embodiment does not limit the internal components of the dispensing head body 4, but directly adopts a dispensing head body 4 made of tungsten steel.

[0043] This embodiment does not specify the specific type of the first connecting tube 5; the first connecting tube 5 may be, but is not limited to, a stainless steel connecting tube. It should be noted that stainless steel is a common material in the prior art, and this embodiment does not specify the internal composition of the first connecting tube 5; instead, a connecting tube made of stainless steel is directly used. This embodiment does not specify the specific type of the second connecting tube 6; the second connecting tube 6 may be, but is not limited to, a stainless steel connecting tube. It should be noted that this embodiment does not specify the internal composition of the second connecting tube 6; instead, a connecting tube made of stainless steel is directly used.

[0044] This embodiment does not limit the specific value of the length L1 of the dispensing end surface. The specific value of the length L1 of the dispensing end surface can be determined based on the actual size of the area where the silver paste 2 is to be dispensed. For example, the length L1 of the dispensing end surface can be 0.59 mm to 0.61 mm, inclusive. This embodiment does not limit the specific value of the width L2 of the dispensing end surface. The specific value of the width L2 of the dispensing end surface can be determined based on the actual size of the area where the silver paste 2 is to be dispensed. For example, the width L2 of the dispensing end surface can be 0.37 mm to 0.39 mm, inclusive.

[0045] This embodiment does not limit the specific value of the length of the groove 41. The specific value of the length of the groove 41 can be determined according to the actual size of the area where the silver paste 2 is applied. For example, the length of the groove 41 can be 0.59mm-0.61mm, and includes the values at both ends. This embodiment does not limit the specific value of the width L3 of the groove. The specific value of the width L3 of the groove can be determined according to the actual size of the area where the silver paste 2 is applied. For example, the width L3 of the groove can be 0.14mm-0.16mm, and includes the values at both ends. This embodiment does not limit the specific value of the depth L4 of the groove. The specific value of the depth L4 of the groove can be determined according to the actual size of the area where the silver paste 2 is applied. For example, the depth L4 of the groove can be 0.065mm-0.085mm, and includes the values at both ends. In this embodiment, the length of the groove 41 is the same as the length L1 of the dispensing end face, and the width L3 of the groove is smaller than the width L2 of the dispensing end face.

[0046] Based on the above embodiment, the utility model extends two side walls on the basis of the dispensing head body, and forms a groove with a rectangular opening shape on the dispensing end face of the dispensing head body. The two side walls serve as blocking walls. When the silver paste is squeezed out through the dispensing hole inside the dispensing head body, it will be restricted between the two side walls and will not overflow to expand the size of the silver paste, thereby achieving the limitation of the shape and size of the silver paste. The silver paste is squeezed into a shape close to a rectangle through the groove. The overflow distance of the rectangular silver paste is smaller than that of the circular silver paste. Especially when the chip is close to the edge of the frame and the chip is rectangular, the overflow of the silver paste can be effectively controlled, avoiding the risk of the silver paste overflowing to the edge of the frame during the soldering process, causing the silver paste to overflow to the back of the frame.

[0047] An embodiment of the present invention provides a dispensing device, which may include: the above-mentioned dispensing head.

[0048] This embodiment does not limit the specific structure and specific parameters of the dispensing head. Please refer to the above description of the dispensing head and will not be repeated here.

[0049] It should be noted that, based on the use of the above-mentioned dispensing head, this embodiment can further reduce the injection amount of the silver paste 2 by adjusting the parameters of the dispensing device to suppress the overflow of the silver paste 2.

[0050] Based on the above embodiments, the dispensing head adopted in the present invention extends two side walls on the basis of the dispensing head body, and forms a groove with an opening shape of a rectangle on the dispensing end face of the dispensing head body. The two side walls serve as blocking walls. When the silver paste is squeezed out through the dispensing hole inside the dispensing head body, it will be restricted between the two side walls and will not overflow to expand the size of the silver paste, thereby achieving the restriction on the shape and size of the silver paste. The silver paste is squeezed into a shape close to a rectangle through the groove. The overflow distance of the rectangular silver paste is smaller than that of the circular silver paste. Especially when the chip is close to the edge of the frame and the chip is rectangular, the overflow of the silver paste can be effectively controlled, avoiding the risk of the silver paste overflowing to the edge of the frame during the soldering process, causing the silver paste to overflow to the back of the frame.

[0051] In order to make the present invention easier to understand, the working principle of the dispensing head provided by the present invention will be described in detail below with reference to specific examples. Figures 7 to 9 , Figure 7 A schematic structural diagram of a dispensing head provided in an embodiment of the utility model; Figure 8 This is a schematic diagram of the dispensing head provided by the embodiment of the utility model extruding silver paste without overflowing to the edge of the frame; Figure 9 This is a schematic diagram of a dispensing head provided by an embodiment of the present invention after welding without overflowing to the edge of the frame.

[0052] This embodiment adopts Figure 7The dispensing head shown includes: a dispensing head body 4, a first connecting tube 5 and a second connecting tube 6;

[0053] Among them, the dispensing end face of the dispensing head body 4 is provided with a semicircular arc groove 41, and the opening shape of the semicircular arc groove 41 is rectangular; the semicircular arc groove 41 includes two arc side walls, the arc side walls extend along the length direction of the semicircular arc groove 41, and are arranged oppositely along the width direction of the semicircular arc groove 41, and the surface of the arc side wall close to the inside of the semicircular arc groove 41 is an arc surface, and the two arc side walls surround to form a semicircular arc groove 41, and the semicircular arc groove 41 passes through the dispensing head body 4 in a direction parallel to the dispensing end face; a dispensing hole 42 is provided inside the semicircular arc groove 41, and the dispensing hole 42 passes through the dispensing head body 4; the dispensing hole 42 is a circular hole; the diameter R of the dispensing hole is the same as the width L3 of the semicircular arc groove;

[0054] A first glue injection channel 51 is provided inside the first connecting tube 5; a second glue injection channel 61 is provided inside the second connecting tube 6; a thread is provided on the outer surface of the second connecting tube 6; an end of the glue dispensing head body 4 facing away from the glue dispensing end face is embedded in one end of the first connecting tube 5; a thread is provided on the inner surface of the first connecting tube 5; the other end of the first connecting tube 5 is threadedly connected to one end of the second connecting tube 6; the glue dispensing hole 42, the first glue injection channel 51 and the second glue injection channel 61 are connected in sequence.

[0055] When the silver paste 2 is injected from one end of the second connecting tube 6 and passes through the second glue injection channel 61, the first glue injection channel 51 and the glue dispensing hole 42 in sequence, it will be confined between the two arc side walls when it is squeezed out from the glue dispensing hole 42, and fill the entire semi-circular groove 41, thereby being squeezed into a shape close to a rectangle by the semi-circular groove 41, as shown in FIG. Figure 8 As shown. Since the overflow distance of the rectangular silver paste 2 is smaller than that of the circular silver paste 2, especially when the chip 3 is close to the edge of the frame 1 and the chip 3 is rectangular, the overflow of the silver paste 2 can be effectively controlled, as shown. Figure 9 As shown, the risk of the silver paste 2 overflowing to the edge of the frame 1 during the soldering process, causing the silver paste 2 to overflow to the back of the frame 1, is avoided.

[0056] The above is a detailed introduction to a dispensing head and a dispensing device provided by the present invention. For those skilled in the art, according to the ideas of the embodiments of the present invention, there may be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A dispensing head, characterized in that: include: Dispensing head body; the dispensing end face of the dispensing head body is provided with a groove, and the opening shape of the groove is rectangular; the groove includes two side walls, the side walls extend along the length direction of the groove, and are arranged oppositely along the width direction of the groove, and the two side walls surround to form the groove, and the groove passes through the dispensing head body in a direction parallel to the dispensing end face; a dispensing hole is provided inside the groove, and the dispensing hole passes through the dispensing head body.

2. The dispensing head according to claim 1, characterized in that: The groove is a semicircular arc groove; the semicircular arc groove includes two circular arc side walls; the circular arc side walls extend along the length direction of the semicircular arc groove and are relatively arranged along the width direction of the semicircular arc groove; the surface of one side of the circular arc side wall close to the inside of the semicircular arc groove is a curved surface.

3. The dispensing head according to claim 1, characterized in that: The dispensing hole is a circular hole.

4. The dispensing head according to claim 3, characterized in that: The diameter of the dispensing hole is the same as the width of the groove.

5. The dispensing head according to claim 1, characterized in that: At least two dispensing holes are provided inside the groove; the dispensing holes are evenly arranged along the extending direction of the groove.

6. The dispensing head according to claim 1, characterized in that: Also includes: A first connecting tube and a second connecting tube; a first glue injection channel is provided inside the first connecting tube; a second glue injection channel is provided inside the second connecting tube; The outer surface of the second connecting pipe is provided with threads; One end of the dispensing head body facing away from the dispensing end face is connected to one end of the first connecting tube, and the other end of the first connecting tube is connected to the second connecting tube; The glue dispensing hole, the first glue injection channel and the second glue injection channel are connected in sequence.

7. The dispensing head according to claim 6, characterized in that: One end of the dispensing head body facing away from the dispensing end face is embedded in one end of the first connecting tube; the inner surface of the first connecting tube is provided with threads; the other end of the first connecting tube is threadedly connected to one end of the second connecting tube.

8. The dispensing end surface according to claim 1, characterized in that: The length of the dispensing end surface is 0.59 mm to 0.61 mm, including the values at both ends; The width of the dispensing end surface is 0.37 mm to 0.39 mm, including the values at both ends.

9. The dispensing end surface according to claim 8, characterized in that: The length of the groove is 0.59 mm to 0.61 mm, inclusive; The width of the groove is 0.14 mm to 0.16 mm, inclusive; The depth of the groove is 0.065 mm to 0.085 mm, inclusive.

10. A dispensing device, characterized in that: include: The dispensing head according to any one of claims 1 to 9.

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