Die bonder with accurate and controllable dispensing effect

Abstract

The utility model discloses a die bonder with accurate and controllable dispensing effect, and relates to the die bonder technical field, the die bonder comprises a protection box, a work bench and a dispensing mechanism, the middle part of the protection box is provided with the work bench, one side of the outer wall of the protection box is provided with a material box, the upper side of the work bench is provided with two groups of parallel slide rails, and the upper side of the work bench is provided with two groups of parallel slide rails. Two conveying tables are slidably connected to the upper side of the sliding rail, a conveyor is installed on the tops of the conveying tables, and a toothed rail installed on the workbench is arranged on one side of the sliding rail. According to the die bonder with the accurate and controllable dispensing effect, efficient dispensing operation can be achieved by arranging the three sets of dispensing nozzles, the upper ends of the dispensing nozzles are connected into the magnetic fluid control valves, and during dispensing machining, the magnetic fluid control valves are connected into the magnetic fluid control valves; conductive adhesive stored in the constant-temperature hopper is conveyed along the adhesive injection sleeve, the adhesive dispensing screw stepping motor, the adhesive injection screw, the magnetic fluid control valve and the adhesive dispensing nozzle, and adhesive discharging can be more accurate and controllable through cooperative use of the adhesive dispensing screw stepping motor and the magnetic fluid control valve.

Description

Technical Field

[0001] The utility model relates to the technical field of crystal bonding machines, in particular to a crystal bonding machine with precise and controllable dispensing effect. Background Art

[0002] The die bonder is a device used to achieve high-speed, high-precision, fully automatic placement of components. It is the most critical and complex equipment in the entire SMT production. During the packaging process, it is necessary to dispense adhesive on the substrate through a dispensing operation, and then use the die bonder to fix the chip on the substrate to ensure that the die bonder can simultaneously perform the dispensing and bonding operations.

[0003] Since the dispensing head is usually installed on the dispensing component, and the general dispensing head needs to feed the conductive glue in the constant temperature hopper into the dispensing head during the glue supply operation, and then dispense the glue to the designated substrate position through the bottom opening of the dispensing head. In this process, the amount of glue dispensed cannot be accurately controlled, which will cause the problem of too much or too little glue in the dispensing operation. Therefore, we proposed a die bonding machine with precise and controllable dispensing effect. Utility Model Content

[0004] The purpose of the utility model is to provide a die bonding machine with a precise and controllable dispensing effect, so as to solve the problems raised by the above-mentioned background technology.

[0005] To achieve the above purpose, the utility model provides the following technical solutions: a die bonding machine with precise and controllable dispensing effect, comprising a protective box, a workbench and a dispensing mechanism,

[0006] A workbench is provided in the middle of the protection box, a material box is provided on one side of the outer wall of the protection box, a support platform is provided on the outer side of the material box, and the support platform is connected to the lifting frame on the outer side of the protection box, a pushing rack for leading out the material tray in the middle of the material box is installed on the side of the material box, two groups of parallel slide rails are installed on the upper side of the workbench, two groups of conveying platforms are slidably connected to the upper sides of the slide rails, a conveyor is installed on the top of the conveying platform, a rack installed with the workbench is provided on one side of the slide rail, a motor is installed on the side of the conveying platform, a gear meshing with the rack is fixed on the bottom output end of the motor, and a CNC screen is movably connected to the outer corner of the protection box;

[0007] Two groups of transverse linear guides are symmetrically fixed on the top of the protection box, and the upper sides of the two groups of transverse linear guides are connected to a forward linear guide No. 1 and a forward linear guide No. 2, and the top of the forward linear guide No. 1 is slidably connected to a slide seat No. 1, and a glue dispensing mechanism is provided on the side of the slide No. 1 close to the forward linear guide No. 2, and a crystal fixing mechanism is provided on the side of the slide No. 2 close to the forward linear guide No. 1, and positioning cameras for positioning are installed on the sides of the slide No. 1 and the slide No. 2, and the upper side of the workbench is also connected to a positioning table through a transverse sliding module and a forward sliding module, and a wafer disk and a correction camera are provided on the upper side of the positioning table.

[0008] Preferably, the glue dispensing mechanism includes three groups of mounting strips installed on the side of slide seat No. 1, a fixing seat is installed in the middle of the mounting strips, a lifting motor is installed on the upper side of the fixing seat, and a lifting screw is connected to the middle of the lifting motor, an exhaust pump is installed on the top of the mounting strip, and a glue injection sleeve is inserted through the middle of the fixing seat.

[0009] Preferably, a constant temperature hopper for holding conductive glue is provided at the upper end of the glue injection sleeve, a glue adding nozzle is provided at the upper end of the constant temperature hopper, the constant temperature hopper is connected to the exhaust pump through an exhaust hose, the lower side of the mounting bar near the fixed seat is connected to a movable seat through a straight rail, and the lifting motor pulls the movable seat up and down through the screw in the middle.

[0010] Preferably, a dispensing screw stepper motor is installed on the upper side of the movable seat, a glue injection screw is connected inside the dispensing screw stepper motor, and a spiral glue supply channel is provided on the outer wall of the glue injection screw and the inner wall of the glue injection sleeve.

[0011] Preferably, the glue injection screw and the glue injection sleeve are sleeve-connected, and the end of the glue injection sleeve is fixed to the glue dispensing screw stepper motor, the bottom end of the glue injection screw is equipped with a glue dispensing nozzle through a magnetofluid control valve, and a cover is installed on the outside of the mounting strip.

[0012] Preferably, the upper opening of the dispensing nozzle is smaller than the lower opening, and the middle channel of the dispensing nozzle is a Venturi structure.

[0013] Preferably, heat sinks are welded at equal intervals on the outer side of the dispensing screw stepper motor, and through holes are opened on the surface of the heat sink.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The die bonding machine with precise and controllable dispensing effect can realize efficient dispensing operation by setting three sets of dispensing nozzles. The upper end of the dispensing nozzle is connected to the magnetic fluid control valve. During the dispensing process, the conductive glue stored in the constant temperature hopper is transported along the injection sleeve, the dispensing screw stepper motor, the injection screw, the magnetic fluid control valve and the dispensing nozzle. The dispensing screw stepper motor and the magnetic fluid control valve are used in conjunction to make the dispensing more precise and controllable.

[0016] 2. This die bonding machine with precise and controllable dispensing effect, when the dispensing operation is completed, absorbs the heat on the surface of the dispensing screw stepper motor through the heat sink. Since the heat sink is guided out from one side of the housing, and the through holes on the surface of the heat sink can accelerate the heat dissipation and cooling of the dispensing screw stepper motor;

[0017] 3. The crystal bonding machine with precise and controllable dispensing effect sets the middle channel of the dispensing nozzle as a Venturi structure, and the upper opening of the middle channel is smaller than the lower opening of the middle channel, so that the dispensing nozzle can achieve a diffusion effect when dispensing glue, and can prevent glue discharge blockage. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0019] Figure 2 It is a three-dimensional structural schematic diagram of the workbench of the utility model;

[0020] Figure 3 It is a three-dimensional structural schematic diagram of the viewing angle conversion of the workbench of the utility model;

[0021] Figure 4 It is a three-dimensional structural schematic diagram of the first slide seat of the utility model;

[0022] Figure 5 It is a three-dimensional structural schematic diagram of the dispensing mechanism of the utility model;

[0023] Figure 6 It is a three-dimensional cross-sectional structural schematic diagram of the dispensing screw stepping motor of the utility model.

[0024] In the figure: 1, protective box; 2, workbench; 3, material box; 301, lifting frame; 302, material pusher; 4, slide rail; 401, conveyor table; 402, conveyor; 403, rack; 404, motor; 405, gear; 5, CNC screen; 6, horizontal linear guide; 7, No. 1 forward linear guide; 701, No. 1 slide; 8, No. 2 forward linear guide; 801, No. 2 slide; 802, Solid crystal mechanism; 9, glue dispensing mechanism; 901, mounting strip; 902, exhaust pump; 903, glue injection sleeve; 904, glue dispensing screw stepper motor; 905, moving seat; 906, fixed seat; 907, lifting motor; 908, glue injection screw; 909, magnetofluid control valve; 910, constant temperature hopper; 911, cover; 10, positioning camera; 11, positioning table; 12, wafer plate; 13, heat sink. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-Figure 4 The utility model provides a technical solution: a crystal bonding machine with precise and controllable dispensing effect, comprising a protective box 1, a workbench 2 and a dispensing mechanism 9, a workbench 2 is arranged in the middle of the protective box 1, a material box 3 is arranged on one side of the outer wall of the protective box 1, a support platform is arranged on the outer side of the material box 3, and the support platform is connected to the lifting frame 301 on the outer side of the protective box 1, and a pushing rack 302 for leading out the material tray in the middle of the material box 3 is installed on the side of the material box 3, two groups of parallel slide rails 4 are installed on the upper side of the workbench 2, two groups of conveying platforms 401 are slidably connected on the upper side of the slide rails 4, a conveyor 402 is installed on the top of the conveying platform 401, a rack 403 installed with the workbench 2 is arranged on one side of the slide rail 4, a motor 404 is installed on the side of the conveying platform 401, a gear 405 meshing with the rack 403 is fixed to the bottom output end of the motor 404, and a numerical control screen 5 is movably connected to the outer corner of the protective box 1;

[0027] Two groups of transverse linear guides 6 are symmetrically fixed on the top of the protective box 1, and the upper sides of the two groups of transverse linear guides 6 are connected to the No. 1 forward linear guide 7 and the No. 2 forward linear guide 8, the top of the No. 1 forward linear guide 7 is slidably connected to the No. 1 slide 701, and a glue dispensing mechanism 9 is arranged on the side of the No. 1 slide 701 close to the No. 2 forward linear guide 8, and the top of the No. 2 forward linear guide 8 is slidably connected to the No. 2 slide 801, and a crystal fixing mechanism 802 is arranged on the side of the No. 2 slide 801 close to the No. 1 forward linear guide 7, and positioning cameras 10 for positioning are installed on the sides of the No. 1 slide 701 and the No. 2 slide 801, and the upper side of the workbench 2 is also connected to the positioning table 11 through the transverse sliding module and the forward sliding module, and a wafer disk 12 and a correction camera are arranged on the upper side of the positioning table 11.

[0028] See also Figure 4 , Figure 5 and Figure 6 The glue dispensing mechanism 9 includes three groups of mounting strips 901 mounted on the side of the first slide 701, a fixing seat 906 is mounted in the middle of the mounting strip 901, a lifting motor 907 is mounted on the upper side of the fixing seat 906, and a lifting screw is connected to the middle of the lifting motor 907, an exhaust pump 902 is mounted on the top of the mounting strip 901, a glue injection sleeve 903 is inserted through the middle of the fixing seat 906, a constant temperature hopper 910 for holding conductive glue is arranged at the upper end of the glue injection sleeve 903, a glue adding nozzle is arranged at the upper end of the constant temperature hopper 910, and the constant temperature hopper 910 can make the conductive glue in the hopper The glue is heated, and glue can be added regularly through the glue adding nozzle. The constant temperature hopper 910 is connected to the exhaust pump 902 through the exhaust hose. When dispensing glue, the exhaust pump 902 can be started to drive the exhaust hose to extract the gas in the constant temperature hopper 910 to ensure the stable operation of dispensing glue. The lower side of the mounting bar 901 close to the fixed seat 906 is connected to the moving seat 905 through a straight rail. The lifting motor 907 pulls the moving seat 905 up and down through the screw in the middle. The lifting motor 907 and the lifting screw are set to drive the lifting and adjustment of the moving seat 905 to achieve precise operation of dispensing glue.

[0029] A glue dispensing screw stepper motor 904 is installed on the upper side of the moving seat 905, and a glue injection screw 908 is connected to the inside of the glue dispensing screw stepper motor 904. The outer wall of the glue injection screw 908 and the inner wall of the glue injection sleeve 903 are both provided with spiral glue supply channels. The glue injection screw 908 and the glue injection sleeve 903 are sleeve-connected, and the end of the glue injection sleeve 903 is fixed to the glue dispensing screw stepper motor 904. A glue dispensing nozzle is installed at the bottom end of the glue injection screw 908 through a magnetofluid control valve 909, and a cover shell 911 is installed on the outer side of the mounting strip 901, and the components of the glue dispensing mechanism 9 can be protected by the cover shell 911.

[0030] In specific implementation, when dispensing glue for wafer substrates of different specifications, glue of different specifications will be used. When the glue is in a thick state, the glue dispensing screw stepper motor 904 is started to drive the injection screw 908 to rotate, so that the glue in the constant temperature hopper 910 can be transported downward along the spiral glue supply channel. When the magnetic fluid control valve 909 is opened, the glue can be dispensed at the designated position through the glue dispensing nozzle;

[0031] When the glue is in a thin state, the magnetic fluid control valve 909 is started to adjust the switch amount, and the dispensing screw stepper motor 904 is started to make the glue injection screw 908 and the glue injection sleeve 903 cooperate to supply glue, so that the glue flowing out of the bottom end of the spiral glue supply channel is dispensed and transported through the magnetic fluid control valve 909 and the dispensing nozzle. The setting of the magnetic fluid control valve 909 makes the glue discharge more accurate and controllable, and the temperature can also be controlled;

[0032] Then, by starting the lifting motor 907 on the fixed seat 906 to rotate forward, the lifting motor 907 pulls the lower movable seat 905 to slide upward through the lifting screw, so that the dispensing mechanism 9 can move unimpeded. When the lifting motor 907 is reversed, the lifting screw will drive the movable seat 905 to move downward, thereby driving the glue injection sleeve 903, the glue dispensing screw stepper motor 904, and the glue injection screw 908 to move downward and approach the substrate on the support tray, so that the glue dispensing mechanism 9 can perform precise glue dispensing operations on the substrate on the support tray through the glue dispensing nozzle. By setting three sets of glue dispensing nozzles, efficient glue dispensing operation can be achieved.

[0033] The first forward linear guide rail 7 and the second forward linear guide rail 8 move synchronously on the upper sides of the two groups of transverse linear guide rails 6 respectively, so that the crystal bonding mechanism 802 and the glue dispensing mechanism 9 can perform crystal bonding operation and glue dispensing operation at the same time.

[0034] See also Figure 5 The upper opening of the dispensing nozzle is smaller than the lower opening, and the middle channel of the dispensing nozzle is a Venturi structure. The middle channel of the dispensing nozzle is set to a Venturi structure, so that the dispensing nozzle can achieve a diffusion effect when dispensing glue, which can prevent glue discharge from being blocked.

[0035] See also Figure 4 and Figure 5 The outer side of the dispensing screw stepper motor 904 is welded with heat sinks 13 at equal intervals, and the surface of the heat sink 13 is provided with through holes.

[0036] During specific implementation, when the dispensing operation is completed, the heat on the surface of the dispensing screw stepper motor 904 is absorbed by the heat sink 13. Since the heat sink 13 is derived from one side of the cover 911 and the through holes on the surface of the heat sink 13 can accelerate the heat dissipation and cooling of the dispensing screw stepper motor 904.

[0037] In summary, by inputting the program in the CNC screen 5, and driving the equipment components on the workbench 2 to operate automatically through the CNC screen 5, during the specific operation, the lifting frame 301 and the pushing frame 302 are driven by the motor to drive the screw rod to operate, so that the lifting frame 301 and the pushing frame 302 have the ability to lift and move forward and backward. At this time, the lifting frame 301 is started to drive the support table to drive the material box 3 to move up and down, and the pushing frame 302 can drive the material tray containing the component substrates to be transported to the conveying table 401, and the gear 405 is driven to rotate forward and reverse by starting the motor 404, so that the gear 405 and the rack 403 are meshed and operated in forward and reverse directions, so that the conveying table 401 can slide back and forth along the slide rail 4 to ensure that the conveying table 401 moves in position. When the conveyor 402 is started, the material tray containing the component substrates can be driven to be transported to another conveying table 401, so that the substrate can be sent to the lower side of the No. 1 forward linear guide 7. At this time, by starting the transverse linear guide 6 and the No. The forward linear guide 7 cooperates so that the cooperation between the transverse linear guide 6 and the No. 1 forward linear guide 7 and the magnet block track drives the No. 1 slide 701 to adjust the position, thereby driving the glue dispensing mechanism 9 on the side of the No. 1 slide 701 to dispense glue to the substrate on the support tray. After the glue dispensing is completed, the transverse linear guide 6 cooperates with the No. 2 forward linear guide 8 to drive the No. 2 slide 801 to adjust the position, so that the substrate of the component is sucked by the solid crystal mechanism 802 and placed on the positioning table 11, and then the wafer in the wafer disk 12 is sucked by the solid crystal mechanism 802 and placed on the substrate of the component, thereby completing the glue dispensing and solid crystal processing. At the same time, the positioning table 11 is driven to adjust the position through the transverse sliding module and the forward sliding module, and then the positioning camera 10 on the side of the solid crystal mechanism 802 cooperates with the correction camera on the positioning table 11, which can ensure that the patch processing achieves the effect of precise positioning. The content not described in detail in this description belongs to the existing technology known to professional and technical personnel in this field.

[0038] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A die bonding machine with a precise and controllable dispensing effect, comprising a protective box (1), a workbench (2) and a dispensing mechanism (9), characterized in that: A workbench (2) is provided in the middle of the protection box (1), a material box (3) is provided on one side of the outer wall of the protection box (1), a support platform is provided on the outer side of the material box (3), and the support platform is connected to the lifting frame (301) on the outer side of the protection box (1), and a pusher frame (302) for leading out the material tray in the middle of the material box (3) is installed on the side of the material box (3), and two sets of parallel slide rails (4) are installed on the upper side of the workbench (2), and the upper side slide rails (4) of the slide rails (4) are provided. Two groups of conveying platforms (401) are movably connected, a conveyor (402) is installed on the top of the conveying platform (401), a rack (403) installed with the workbench (2) is arranged on one side of the slide rail (4), a motor (404) is installed on the side of the conveying platform (401), a gear (405) meshing with the rack (403) is fixed at the bottom output end of the motor (404), and a numerical control screen (5) is movably connected to the outer corner of the protection box (1); Two groups of transverse linear guide rails (6) are symmetrically fixed on the top of the protection box (1), and the upper sides of the two groups of transverse linear guide rails (6) are connected to a No. 1 forward linear guide rail (7) and a No. 2 forward linear guide rail (8), and the top of the No. 1 forward linear guide rail (7) is slidably connected to a No. 1 slide seat (701), and a glue dispensing mechanism (9) is provided on the side of the No. 1 slide seat (701) close to the No. 2 forward linear guide rail (8), and the top of the No. 2 forward linear guide rail (8) is slidably connected to a No. 1 slide seat (701). A second slide (801) is connected, and a crystal fixing mechanism (802) is arranged on one side of the second slide (801) close to the first forward linear guide rail (7). Positioning cameras (10) for positioning are installed on the sides of the first slide (701) and the second slide (801). The upper side of the workbench (2) is also connected to a positioning platform (11) through a lateral sliding module and a forward sliding module. A wafer disk (12) and a correction camera are arranged on the upper side of the positioning platform (11).

2. A die bonding machine with precise and controllable dispensing effect according to claim 1, characterized in that: The glue dispensing mechanism (9) includes three groups of mounting strips (901) mounted on the side of the first slide seat (701), a fixed seat (906) is mounted in the middle of the mounting strips (901), a lifting motor (907) is mounted on the upper side of the fixed seat (906), and a lifting screw is connected to the middle of the lifting motor (907), an exhaust pump (902) is mounted on the top of the mounting strips (901), and a glue injection sleeve (903) is inserted through the middle of the fixed seat (906).

3. A die bonding machine with precise and controllable dispensing effect according to claim 2, characterized in that: The upper end of the glue injection sleeve (903) is provided with a constant temperature hopper (910) for containing conductive glue, and the upper end of the constant temperature hopper (910) is provided with a glue adding nozzle. The constant temperature hopper (910) is connected to the exhaust pump (902) through an exhaust hose. The lower side of the mounting bar (901) near the fixed seat (906) is connected to the movable seat (905) through a straight rail. The lifting motor (907) pulls the movable seat (905) up and down through a screw in the middle.

4. The die bonding machine with precise and controllable dispensing effect according to claim 3, characterized in that: A glue dispensing screw stepper motor (904) is installed on the upper side of the movable seat (905), and a glue injection screw (908) is connected to the inside of the glue dispensing screw stepper motor (904). The outer wall of the glue injection screw (908) and the inner wall of the glue injection sleeve (903) are both provided with spiral glue supply channels.

5. The die bonding machine with precise and controllable dispensing effect according to claim 4, characterized in that: The glue injection screw (908) is sleeve-connected to the glue injection sleeve (903), and the end of the glue injection sleeve (903) is fixed to the glue dispensing screw stepper motor (904). The bottom end of the glue injection screw (908) is installed with a glue dispensing nozzle through a magnetic fluid control valve (909), and a cover shell (911) is installed on the outer side of the mounting strip (901).

6. The die bonding machine with precise and controllable dispensing effect according to claim 5, characterized in that: The upper opening of the dispensing nozzle is smaller than the lower opening, and the middle channel of the dispensing nozzle is a Venturi structure.

7. The die bonding machine with precise and controllable dispensing effect according to claim 5, characterized in that: Heat sinks (13) are welded at equal intervals on the outer side of the dispensing screw stepper motor (904), and through holes are provided on the surface of the heat sink (13).

Images