Chip placement machine with eccentric nozzle suction structure

Abstract

The utility model provides an eccentric suction nozzle suction structure for chip placement and a chip placement machine, belonging to the field of semiconductor technology, including a nozzle frame, a hollow suction tube and a nozzle body; the hollow suction tube is slidably connected to the nozzle frame, and the hollow suction tube is connected to the vacuum equipment through a hose; the nozzle body is connected to the lower end of the hollow suction tube, an eccentric suction hole is arranged in the nozzle body, the eccentric suction hole is connected to the hollow air passage of the hollow suction tube, and an avoidance gap for the sensitive area on the chip is arranged on the lower end surface of the nozzle body; the upper end of the spring is connected to the upper end of the hollow suction tube, and the lower end of the spring is connected to the lower end of the nozzle frame. The utility model is provided with an eccentric suction hole on the nozzle body, and a avoidance gap for avoiding the sensitive area is arranged at the lower end of the nozzle body; when the nozzle is pressed downward, the avoidance gap is aligned with the sensitive area of ​​the chip, which can avoid the risk of the nozzle crushing the sensitive area of ​​the chip, and with the help of the buffering of the spring, the impact of the nozzle on the chip is avoided, thereby ensuring the reliability of the product.

Description

Technical Field

[0001] The utility model belongs to the technical field of semiconductors, and in particular relates to a chip mounting eccentric suction nozzle suction structure and a chip mounting machine. Background Art

[0002] The chip mounter is also called "mounting machine" or "surface mount system". In the production line, it is configured after the dispensing machine or screen printer. It is a device that accurately places the chip on the substrate to be mounted by moving the nozzle on the mounting head.

[0003] The suction nozzle of the placement machine is a key part for the placement machine to place and stick the sucked components. The suction nozzle is connected to the vacuum air duct. The suction nozzle generates suction force through vacuum extraction to suck up the chip, then places the chip on the substrate and presses it, and then releases the vacuum to blow the chip off.

[0004] Since there are sensitive areas such as circuits, capacitors or air bridges on the chip, it is easy to damage the sensitive areas of the chip when the nozzle presses down on the chip, causing damage to the chip and affecting product reliability; and when the nozzle moves downward to pick up the chip, it is also easy to move out of position and touch the sensitive area, causing damage to the chip. Utility Model Content

[0005] The embodiment of the utility model provides a chip placement eccentric suction nozzle suction structure and a chip placement machine, aiming to solve the risk of damaging the chip by pressing down the suction nozzle.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a patch eccentric suction nozzle suction structure, including:

[0007] Nozzle holder;

[0008] A hollow straw, slidably connected to the nozzle holder;

[0009] A nozzle body connected to the lower end of the hollow straw, wherein an eccentric suction hole is provided in the nozzle body, wherein the eccentric suction hole is communicated with the hollow air passage of the hollow straw, and a notch for avoiding the sensitive area on the chip is provided on the lower end surface of the nozzle body; and

[0010] A spring, wherein the upper end of the spring is connected to the upper end of the hollow straw, and the lower end of the spring is connected to the lower end of the nozzle holder.

[0011] In combination with the first aspect, in one feasible manner, a spring is provided between the nozzle holder and the hollow straw, the upper end of the spring is connected to the upper end of the hollow straw, and the lower end of the spring is connected to the lower end of the nozzle holder.

[0012] In combination with the first aspect, in one achievable manner, the nozzle holder includes a guide tube, and the hollow suction tube is slidably fitted in the guide tube; the lower end of the spring is connected to the outer side of the lower end of the guide tube.

[0013] In combination with the first aspect, in one feasible manner, a lower connecting rod is provided on the outer side of the lower end of the guide tube, an upper connecting rod is provided on the outer side of the upper end of the hollow straw, and the upper and lower ends of the spring are respectively connected to the upper connecting rod and the lower connecting rod.

[0014] In combination with the first aspect, in one feasible manner, a weak magnet block is provided on the guide tube, and the hollow straw is made of a weak magnetic material.

[0015] In combination with the first aspect, in one feasible manner, the weak magnet block and the hollow straw are both made of ferrite material or iron-nickel alloy material.

[0016] In combination with the first aspect, in one achievable manner, the weak magnet block is an annular structure and is embedded in the outer wall of the guide tube.

[0017] In combination with the first aspect, in one achievable manner, the upper part, the middle part and the lower part of the guide tube are respectively provided with annular weak magnet blocks.

[0018] In combination with the first aspect, in one feasible manner, the nozzle rack also includes a pulley group that rolls and rubs with the hollow straw. The pulley group is provided at the upper end, the lower end, or both ends of the nozzle rack. The pulley group includes two pulleys symmetrically arranged along the center line of the hollow straw, and the hollow straw forms rolling friction with the pulley.

[0019] In the second aspect, the embodiment of the utility model also provides a chip placement machine, which is equipped with the above-mentioned chip placement eccentric suction nozzle suction structure.

[0020] Compared with the prior art, the chip placement machine and the chip eccentric nozzle suction structure provided by the utility model have the following beneficial effects: an eccentric suction hole is provided on the nozzle body, and an avoidance notch for avoiding the sensitive area is provided at the lower end of the nozzle body; when the nozzle is pressed downward, the avoidance notch is aligned with the sensitive area of ​​the chip, thereby avoiding the risk of the nozzle crushing the sensitive area of ​​the chip, and with the help of the spring buffer, the nozzle is prevented from impacting the chip, thereby ensuring the reliability of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the structure of the patch eccentric suction nozzle suction structure provided by an embodiment of the utility model;

[0022] Figure 2A schematic diagram of the bottom view of the nozzle body provided in an embodiment of the utility model;

[0023] Description of reference numerals:

[0024] 1. Hollow straw; 11. Upper connecting rod; 2. Pulley block; 3. Guide tube; 31. Lower connecting rod; 4. Weak magnet block; 5. Suction nozzle body; 51. Avoidance gap; 52. Eccentric suction hole; 6. Chip; 7. Spring. DETAILED DESCRIPTION

[0025] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0026] Please also read Figure 1 and Figure 2 , the patch eccentric suction nozzle suction structure provided by the utility model is now described. The patch eccentric suction nozzle suction structure includes a suction nozzle frame, a hollow suction tube 1 and a suction nozzle body 5; the suction nozzle frame is a fixed body, which is installed on the frame of the patch machine to provide guidance for the up and down movement of the hollow suction tube 1. The hollow suction tube 1 is slidably connected to the suction nozzle frame, and the hollow suction tube 1 is connected to the vacuum equipment through a hose, which drives the suction nozzle body 5 to move up and down and draws vacuum for the suction nozzle body 5; the suction nozzle body 5 is connected to the lower end of the hollow suction tube 1, and an eccentric suction hole 52 is provided in the suction nozzle body 5, and the eccentric suction hole 52 is connected to the hollow air duct of the hollow suction tube 1, and an avoidance gap 51 for the sensitive area on the chip 6 is provided on the lower end surface of the suction nozzle body 5.

[0027] Compared with the prior art, the chip 6 chip placement machine and the chip 6 eccentric suction nozzle suction structure provided by the utility model have the following beneficial effects: an eccentric suction hole 52 is set on the suction nozzle body 5, and an avoidance notch 51 for avoiding the sensitive area is set at the lower end of the suction nozzle body 5; when the suction nozzle is pressed downward, the avoidance notch 51 is aligned with the sensitive area of ​​the chip 6, which can avoid the risk of the suction nozzle crushing the sensitive area of ​​the chip 6, thereby ensuring the reliability of the product.

[0028] Since the nozzle body 5 is detachably connected to the hollow straw 1, the nozzle body 5 with different structures can be replaced when mounting and adsorbing chips 6 with different structures. The nozzle body 5 is provided with a connecting portion, which can be provided with a thread and screwed with the internal thread in the hollow straw 1 to achieve a detachable connection.

[0029] The avoidance gap 51 may be a rectangular groove or a circular groove.

[0030] In order to avoid the problem that the chip 6 is broken due to excessive impact force when the hollow straw 1 and the nozzle body 5 are lowered, refer to Figure 1As shown, in this embodiment, a spring 7 is provided between the nozzle holder and the hollow straw 1, specifically, the upper end of the spring 7 is connected to the upper end of the hollow straw 1, and the lower end of the spring 7 is connected to the lower end of the nozzle holder. When the nozzle body 5 moves downward, the rebound force of the spring 7 makes the nozzle body 5 encounter greater resistance and descend more slowly as it approaches the chip 6, thereby slowing down the downward speed of the nozzle body 5, so that the nozzle body 5 can slowly contact the chip 6, thereby avoiding the impact of the nozzle body 5 on the chip 6 and avoiding the problem of chip 6 breaking.

[0031] In some embodiments, Figure 1 As shown, the nozzle frame includes a guide tube 3, and the hollow straw 1 is slidably fitted in the guide tube 3; the lower end of the spring 7 is connected to the outer side of the lower end of the guide tube 3. The guide tube 3 is fixed on the frame of the placement machine, and has the function of guiding and limiting the up and down movement of the hollow straw 1, which can prevent the hollow straw 1 from deviating and causing the nozzle body 5 to move out of position.

[0032] In some embodiments, Figure 1 As shown, a lower connecting rod 31 is provided on the outer side of the lower end of the guide tube 3, an upper connecting rod 11 is provided on the outer side of the upper end of the hollow straw 1, and the upper and lower ends of the spring 7 are respectively connected to the upper connecting rod 11 and the lower connecting rod 31.

[0033] Since there is a gap in the sliding fit between the hollow straw 1 and the guide tube 3, the hollow straw 1 may be eccentric when it moves up and down along the guide tube 3, so that the eccentric suction hole 52 of the nozzle body 5 deviates from the correct suction position. In order to solve this problem, Figure 1 As shown, in this embodiment, a weak magnet block 4 is arranged on the guide tube 3, and the hollow straw 1 is made of a weak magnetic material. Based on this embodiment, when the weak magnet block 4 is arranged on one side of the guide tube 3, the hollow straw 1 can be attached to the side wall of the guide tube 3 through the magnetic attraction effect, and run up and down along the side wall, thereby avoiding the problem of the hollow straw 1 and the nozzle body 5 running off.

[0034] Alternatively, if Figure 1 As shown, when the weak magnet block 4 is a ring structure, the weak magnet block 4 surrounds the guide tube 3, and the magnetic properties of the radial magnetic circles of the guide tube 3 are the same, so that the hollow straw 1 can be located in the center of the guide tube 3, ensuring that the hollow straw 1 is strictly coaxial with the guide tube 3, and also avoiding the problem of the hollow straw 1 and the nozzle body 5 deviation.

[0035] Weak magnetic metal material refers to a metal material with relatively weak magnetism, and its magnetic permeability is much lower than that of ferromagnetic material. Among them, the material of the weak magnet block 4 and the hollow straw 1 are both ferrite material or iron-nickel alloy material.

[0036] In some embodiments, Figure 1As shown, the upper, middle and lower parts of the guide tube 3 are respectively provided with annular weak magnet blocks 4. By arranging the annular weak magnet blocks 4 at the top, middle and bottom, the hollow straw 1 forms a three-point stable support in the up and down directions, ensuring that the nozzle body 5 will not move, and improving the accuracy of the suction position of the nozzle body 5.

[0037] In some embodiments, Figure 1 As shown, the nozzle rack also includes a pulley group 2 that rolls and rubs with the hollow straw 1. The upper end, the lower end, or both ends of the nozzle rack are provided with a pulley group 2. The pulley group 2 includes two pulleys symmetrically arranged along the center line of the hollow straw 1, and the hollow straw 1 forms a rolling friction with the pulley. Since the hollow straw 1 and the guide tube 3 in the present embodiment do not require precise fit, there is a certain fit gap between the two, and sliding friction will be formed between the two, which is not conducive to the sliding of the hollow straw 1 and will also cause wear to both; therefore, preferably, there is a larger fit gap between the hollow straw 1 and the guide tube 3, and the guide tube 3 realizes preliminary guidance and position limitation of the hollow straw 1 in the general direction, and the configured pulley block 2 can be clamped on the hollow straw 1 to accurately limit the position of the hollow straw 1 to prevent the risk of the hollow straw 1 running off and causing the nozzle body 5 to deviate from the correct adsorption position. Secondly, the pulley block 2 and the hollow straw 1 form a rolling fit relationship, which also reduces the friction and wear of the hollow straw 1, and also reduces the resistance of the hollow straw 1 to the upward movement.

[0038] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0039] Based on the same inventive concept, an embodiment of the present application also provides a chip placement machine, which is equipped with the above-mentioned chip placement eccentric suction nozzle suction structure.

[0040] The chip placement machine provided by the utility model is provided with an eccentric suction hole 52 on the suction nozzle body 5, and an avoidance notch 51 for avoiding the sensitive area is provided at the lower end of the suction nozzle body 5; when the suction nozzle is pressed downward, the avoidance notch 51 is aligned with the sensitive area of ​​the chip 6, which can avoid the risk of the suction nozzle crushing the sensitive area of ​​the chip 6, thereby ensuring the reliability of the product.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A patch eccentric nozzle suction structure, characterized in that: include: Nozzle holder; A hollow straw (1) is slidably connected to the nozzle holder; A nozzle body (5) is connected to the lower end of the hollow straw (1), an eccentric suction hole (52) is provided in the nozzle body (5), the eccentric suction hole (52) is communicated with the hollow air passage of the hollow straw (1), and a notch (51) for avoiding the sensitive area on the chip (6) is provided on the lower end surface of the nozzle body (5); and A spring (7), wherein the upper end of the spring (7) is connected to the upper end of the hollow straw (1), and the lower end of the spring (7) is connected to the lower end of the nozzle holder.

2. The patch eccentric nozzle suction structure according to claim 1, characterized in that: The suction nozzle frame comprises a guide tube (3), the hollow suction tube (1) is slidably fitted in the guide tube (3); the lower end of the spring (7) is connected to the outer side of the lower end of the guide tube (3).

3. The patch eccentric nozzle suction structure according to claim 2, characterized in that: A lower connecting rod (31) is arranged on the outer side of the lower end of the guide tube (3), an upper connecting rod (11) is arranged on the outer side of the upper end of the hollow straw (1), and the upper and lower ends of the spring (7) are respectively connected to the upper connecting rod (11) and the lower connecting rod (31).

4. The patch eccentric nozzle suction structure according to claim 3, characterized in that: A weak magnet block (4) is provided on the guide tube (3), and the hollow straw (1) is made of a weakly magnetic material.

5. The patch eccentric nozzle suction structure according to claim 4, characterized in that: The weak magnet block (4) and the hollow straw (1) are both made of ferrite material or iron-nickel alloy material.

6. The patch eccentric nozzle suction structure according to claim 4, characterized in that: The weak magnet block (4) is an annular structure and is embedded around the outer wall of the guide tube (3).

7. The patch eccentric nozzle suction structure according to claim 6, characterized in that: The upper part, the middle part and the lower part of the guide tube (3) are respectively provided with annular weak magnet blocks (4).

8. The patch eccentric nozzle suction structure according to claim 1, characterized in that: The nozzle rack further comprises a pulley block (2) for rolling friction with the hollow straw (1); the pulley block (2) is arranged at the upper end, the lower end or both ends of the nozzle rack; the pulley block (2) comprises two pulleys symmetrically arranged along the center line of the hollow straw (1); the hollow straw (1) forms rolling friction with the pulleys.

9. A chip mounter, characterized in that: The device is provided with an eccentric nozzle suction structure for patches as described in any one of claims 1 to 8.

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