High-speed film tearing equipment for QFN (Quad Flat No-lead) frame

Abstract

The utility model belongs to the technical field of semiconductor packaging, and relates to high-speed film tearing equipment for a QFN (Quad Flat No-lead) frame. The equipment mainly comprises a frame feeding and discharging mechanism (1), a frame sucking and placing mechanism (2), a vacuum film tearing platform movement mechanism (3), a glue film separating mechanism (4) and a glue film clamping movement mechanism (5), the frame feeding and discharging mechanism (1) comprises a plurality of frame material boxes (11) used for containing QFN frames, the frame sucking and placing mechanism (2) is used for sucking the QFN frames and conveying the QFN frames to the vacuum film tearing platform movement mechanism (3), and the vacuum film tearing platform movement mechanism (3) drives an adhesive film separation ejector pin (315) to stretch out to achieve preliminary separation of adhesive films. And then the adhesive film is thoroughly separated from the QFN frame through the adhesive film separation mechanism (4), and finally the adhesive film is clamped and taken away by the adhesive film clamping movement mechanism (5). The adhesive film on the QFN frame can be quickly removed, the production efficiency is improved, and the product quality is improved.

Description

Technical Field

[0001] This application belongs to the field of semiconductor packaging technology, and specifically relates to a high-speed film peeling device for QFN frames. Background Technology

[0002] With the development of semiconductor technology, leadframe products have become one of the most mature products in semiconductor packaging. QFN (Quick Frame No.) is a square, leadless surface-mount package and is currently one of the main packaging forms for mid-to-high-end semiconductor integrated circuits. Due to its advantages such as good electrothermal performance, high density, small size, and light weight, QFN packaging has seen rapid development in the field of electronic packaging.

[0003] The QFN packaging manufacturing process requires attaching a polyimide film to the back of the QFN leadframe before die bonding or after wire bonding. This film is a semiconductor packaging material with properties such as adhesion, high temperature resistance, and corrosion resistance. Attaching the film to the back of the leadframe prevents resin from squeezing out and leaking through the gaps in the leadframe during molding, which could cause overflow and lead to packaging defects. After molding, the film on the back of the leadframe needs to be removed to allow for subsequent electroplating, cutting, and other processes.

[0004] Currently, the conventional method for removing the adhesive film from the lead frame is by manual removal. However, due to the film's strong adhesion, the inability to precisely control the force applied manually, and the difficulty in standardizing the process, manual removal easily leads to product quality issues such as film breakage and frame deformation. Furthermore, manual operation is inefficient and requires a significant amount of manpower. Utility Model Content

[0005] To solve the above-mentioned technical problems, this application provides a high-speed film-tearing device for QFN frames, which mainly includes a frame loading and unloading mechanism, a frame suction and placement mechanism, a vacuum film-tearing platform motion mechanism, a film separation mechanism, and a film clamping motion mechanism.

[0006] The frame loading and unloading mechanism includes multiple frame boxes for holding QFN frames. The frame suction and placement mechanism includes a track arranged above the frame loading and unloading mechanism and the vacuum film-tearing platform motion mechanism, and a suction mechanism moving on the track. The suction mechanism has a spring-loaded suction cup for suctioning the QFN frame and transporting it to the vacuum film-tearing platform motion mechanism. The vacuum film-tearing platform motion mechanism has a vacuum platform and several sets of adhesive film separation pins located on the vacuum platform. After the vacuum platform adsorbs the QFN frame, it drives the adhesive film separation pins to extend and pass through the end gap of the QFN frame, thus lifting the adhesive film on the QFN frame. The adhesive film separation mechanism includes an adhesive film separation plate, which is inserted between the adhesive film and the QFN frame to separate the adhesive film from the QFN frame. The adhesive film clamping motion mechanism includes an adhesive film clamping mechanism, which drives the adhesive film clamps on it to clamp the adhesive film.

[0007] Preferably, the frame loading and unloading mechanism further includes a frame lifting mechanism and a material box moving mechanism. The material box moving mechanism includes a material box moving mechanism base plate with a material box moving positioning track on it. The frame lifting mechanism includes a lifting mechanism base plate with a material box positioning track that is connected to the material box moving positioning track. The material box positioning track is located below the track of the frame suction and placement mechanism. The end of the material box moving positioning track away from the material box positioning track is the manual operation end. The frame material box is driven to move on the material box moving positioning track and the material box positioning track by the drive mechanism.

[0008] Preferably, the bottom of the frame material box is provided with a movable base plate, and multiple QFN frames are stacked on the movable base plate. The movable base plate has a movable pin on its side, which is inserted into a strip hole extending vertically on the side of the frame material box. The frame lifting mechanism includes an electric push rod. When the QFN frame moves to the material box positioning track, the electric push rod pushes the movable base plate to move vertically in the frame material box.

[0009] Preferably, the lifting mechanism of the frame lifting mechanism has a column on its base plate, and a position sensor is installed at the top of the column. The position sensor is directly opposite the frame box located on the material box positioning track to monitor the height of the QFN frames stacked inside the frame box.

[0010] Preferably, the frame suction and placement mechanism includes a frame loading suction mechanism and a frame unloading suction mechanism. Both the frame loading suction mechanism and the frame unloading suction mechanism include a suction cup fixing plate. Multiple spring-loaded suction cups are arranged below the suction cup fixing plate, and a frame pressure plate is also arranged below the suction cup fixing plate. After the QFN frame is lifted by the multiple spring-loaded suction cups, it is transferred to the vacuum film-tearing platform motion mechanism and then pressed onto the vacuum platform by the frame pressure plate. The spring-loaded suction cups and the frame pressure plate are driven up and down by a cylinder. The frame loading suction mechanism is used to pick up the un-torn QFN frame from the frame material box, and the frame unloading suction mechanism is used to put the film-torn QFN frame into the frame material box.

[0011] Preferably, the vacuum platform of the vacuum tearing platform motion mechanism is provided with an X-direction motion positioning clamp and an X-direction fixed positioning block on both sides of the vacuum platform along the X direction, and a Y-direction motion positioning clamp and a Y-direction fixed positioning block on both sides of the vacuum platform along the Y direction. By driving the X-direction motion positioning clamp and the Y-direction motion positioning clamp, the QFN frame is positioned to fit the X-direction fixed positioning block and the Y-direction fixed positioning block.

[0012] Preferably, the vacuum platform adsorbs the QFN frame through a number of sets of vacuum suction cups arranged thereon.

[0013] Preferably, the film separation mechanism further includes a film blowing nozzle, which is disposed above the film separation plate and faces the film separation plate, and is used to blow up the film separated by the film separation plate.

[0014] Preferably, the film separation mechanism further includes an air pressure regulating valve, which is installed on the air supply line connected to the film air nozzle.

[0015] Preferably, the clamping motion mechanism further includes a motion timing belt, a linear guide rail, and a motion motor. The motion motor drives the film clamping mechanism to move along the linear guide rail via the motion timing belt. The film clamping mechanism also includes a second film blowing nozzle, which is used to blow the film into the waste box after the film clamp releases the clamped film.

[0016] This application enables the rapid removal of adhesive film from QFN frames, improving production efficiency and enhancing product quality. Attached Figure Description

[0017] Figure 1 This is an isometric view of a preferred embodiment of the QFN frame high-speed film-tearing device of this application.

[0018] Figure 2 This application Figure 1 Left view of the embodiment shown.

[0019] Figure 3 This is a schematic diagram of the frame loading and unloading mechanism.

[0020] Figure 4 This is a schematic diagram of the frame material box and the frame lifting mechanism.

[0021] Figure 5 This is a schematic diagram of the frame suction and placement mechanism installation.

[0022] Figure 6 This is a schematic diagram of the frame-absorbing and placing mechanism.

[0023] Figure 7 This is a schematic diagram of the motion mechanism of the vacuum film-tearing platform.

[0024] Figure 8 This is a schematic diagram of the vacuum film-tearing platform structure.

[0025] Figure 9 This is a schematic diagram of the membrane separation mechanism.

[0026] Figure 10 This is a schematic diagram of the film clamping motion mechanism.

[0027] Figure 11 This is a schematic diagram of the adhesive film clamping mechanism.

[0028] Among them, 1-frame loading and unloading mechanism, 11-frame material box, 111-QFN frame, 112-frame material box, 113-material box handle, 114-movable base plate, 115-movable pin, 12-frame lifting mechanism, 121-lifting mechanism base plate, 122-material box positioning track, 123-electric push rod, 124-guide column, 125-position sensor, 126-front separation plate, 13-material box moving mechanism, 131-material box moving mechanism base plate, 132-material box moving fork, 133-material box moving positioning track;

[0029] 2-Frame suction and placement mechanism, 21-Frame loading suction mechanism, 22-Frame unloading suction mechanism, 211-Front upper and lower cylinder, 212-Rear upper and lower cylinder, 213-Frame pressure plate cylinder, 214-Frame pressure plate, 215-Spring buffer suction cup, 216-Suction cup fixing plate.

[0030] 3-Vacuum film tearing platform motion mechanism, 31-Vacuum film tearing platform, 311-Vacuum platform, 312-Y-direction motion positioning clamp, 313-X-direction motion positioning clamp, 314-Y-direction fixed positioning block, 315-Film separation ejector pin, 316-X-direction fixed positioning block, 317-Vacuum suction cup, 318-Vacuum sensor, 32-Mechanism fixed base plate, 33-Linear guide rail, 34-Motion motor;

[0031] 4-Film separation mechanism, 41-Film separation back plate, 42-Film separation upper and lower cylinders, 43-Film separation plate, 44-Film blowing nozzle, 45-Blowing nozzle fixing block, 46-Blowing pressure regulating valve;

[0032] 5-Film clamping motion mechanism, 51-Film clamping mechanism, 511-Film clamping upper and lower cylinders, 512-Film clamping front and rear cylinders, 513-Film clamping cylinder, 514-Film clamp, 515-Second film blowing nozzle, 516-Film detection sensor, 52-Motion timing belt, 53-Linear guide rail, 54-Motion motor. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, not all, of the embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0034] The purpose of this application is to provide a high-speed film-tearing device for QFN frames to achieve fully automated operation of the QFN frame film-tearing process.

[0035] The high-speed film-tearing device for QFN frames provided in this application is as follows: Figure 1 and Figure 2 As shown, the main components include a frame loading / unloading mechanism 1, a frame suction and placement mechanism 2, a vacuum film-tearing platform motion mechanism 3, a film separation mechanism 4, and a film clamping motion mechanism 5. This equipment enables efficient and high-quality film removal of QFN frames after the molding process. The left-right direction when a person is standing in front of the equipment is defined as the X-axis, and the front-back direction as the Y-axis.

[0036] The frame loading and unloading mechanism 1 includes multiple frame boxes 11 for holding QFN frames 111, such as... Figure 3 and Figure 4 As shown, the QFN frame 111 in the frame material box 11 can be picked up by the frame picking and placing mechanism 2. The frame picking and placing mechanism 2 includes a track arranged above the frame loading and unloading mechanism 1 and the vacuum film tearing platform motion mechanism 3, and a picking mechanism moving on the track, such as... Figure 5 and Figure 6As shown, the suction mechanism has a spring-loaded suction cup 215 for picking up the QFN frame 111, thereby picking up the QFN frame 111 from the frame material box 11 or placing the picked-up QFN frame 111 into the frame material box 11. The picked-up QFN frame 111 is transported to the vacuum film-tearing platform motion mechanism 3, as shown in the reference. Figure 7 and Figure 8 The vacuum film-tearing platform motion mechanism 3 has a vacuum platform 311 and several sets of adhesive film separation pins 315 located on the vacuum platform 311. After the vacuum platform 311 adsorbs the QFN frame 111, it drives the adhesive film separation pins 315 to extend and pass through the end gaps of the QFN frame 111, lifting the adhesive film on the QFN frame 111. Then, the adhesive film separation mechanism 4 separates the adhesive film. Figure 9 As shown, the film separation mechanism 4 includes a film separation plate 43, which is inserted between the film and the QFN frame 111 to separate the film from the QFN frame. The vacuum film tearing platform motion mechanism 3 also drives the QFN frame 111 to the position of the film clamping motion mechanism 5, as shown. Figure 10 and Figure 11 As shown, the adhesive film clamping motion mechanism 5 includes an adhesive film clamping mechanism 51, which drives the adhesive film clamp 514 thereon to clamp the adhesive film.

[0037] In some optional embodiments, the frame loading and unloading mechanism 1 further includes a frame lifting mechanism 12 and a box moving mechanism 13. The box moving mechanism 13 includes a box moving mechanism base plate 131 with a box moving positioning track 133. The frame lifting mechanism 12 includes a lifting mechanism base plate 121 with a box positioning track 122 that is connected to the box moving positioning track 133. The box positioning track 122 is located below the track of the frame suction and placement mechanism 2. The end of the box moving positioning track 133 away from the box positioning track 122 is a manual operation end. The frame box 11 is driven to move on the box moving positioning track 133 and the box positioning track 122 by a driving mechanism.

[0038] In this embodiment, the frame loading and unloading mechanism 1 is mainly used for transporting the frame material box 11, such as... Figure 1 and Figure 3 As shown, this application arranges five sets of frame loading and unloading mechanisms 1 on the operating platform, evenly arranged in the X direction at the front of the equipment, for loading and unloading various materials such as untorn film frames, finished frames, release paper, and defective frames. Figure 3In the middle, the leftmost frame box 11 is located at the rear end of the box moving and positioning track 133 along the Y-axis. This end is the manual operation end. The operator places the QFN frame 111 into the frame box 11, or removes the QFN frame 111 from the frame box 11. The frame box 11, loaded with the QFN frame 111, moves forward along the Y-axis until it stops on the box positioning track 122. Figure 3 In the middle, the other four frame material boxes 11 are located in the position. This movement process is based on the material box moving fork 132, which drives the frame material box 11 from the material box moving positioning track 133 to the material box positioning track 122.

[0039] refer to Figure 4 At the material box positioning track 122, the bottom of the frame material box 11 is a frame lifting mechanism 12, and the top is a frame suction and placement mechanism 2. The frame lifting mechanism 12 lifts the QFN frame 111 inside the frame material box 11 so that the frame suction and placement mechanism 2 can pick it up and transfer it. For this purpose, this application first designed the frame material box 11. For example, in some optional embodiments, the bottom of the frame material box 11 is provided with a movable base plate 114, and multiple QFN frames 111 are stacked on the movable base plate 114. The movable base plate 114 has a movable pin 115 on its side, which is inserted into the vertically extending strip hole on the side of the frame material box 11. The frame lifting mechanism 12 includes an electric push rod 123. When the QFN frame 111 moves to the material box positioning track 122, the electric push rod 123 pushes the movable base plate 114 to move up and down in the frame material box 11.

[0040] In this embodiment, after the frame material box 11 is fixed above the frame lifting mechanism 12 via the material box fixing track 122 and the front separation plate 126, if this material box is used for loading un-torn film frames, the electric push rod 123 moves upward to push the movable base plate 114, causing the stacked QFN frames 111 on it to move upward. As the number of un-torn film frames in the material box decreases, the movable base plate 114 moves upward continuously until there are no un-torn film frames in the frame material box 11. If this material box is used for unloading finished frames after film removal, the electric push rod 123 first moves upward to push the movable base plate 114 to the upper limit position. After placing a QFN frame 111 into the frame material box 11, the electric push rod 123 moves downward a certain distance, and the movable base plate 114 also moves downward under the action of gravity. As the number of un-torn film frames in the material box increases, the movable base plate 114 descends continuously until the movable base plate 114 descends to the lower limit position.

[0041] In this embodiment, the movable pins 115 typically include four, and correspondingly, the number of strip-shaped holes extending vertically along the side of the frame material box 11 is also four, such as... Figure 4 As shown, two are arranged on each of the left and right sides.

[0042] In some alternative embodiments, the lifting mechanism 12 of the frame lifting mechanism 12 is provided with a column on the lifting mechanism base plate 121, and a position sensor 125 is provided at the top of the column. The position sensor 125 is directly opposite the frame material box 11 located on the material box positioning track 122 to monitor the height of the QFN frame 111 stacked inside the frame material box 11.

[0043] In this embodiment, the position sensor 125 is used to monitor the rising or falling position of the QFN frame. When the QFN frame 111 moves to the position of the position sensor 125, the electric push rod 123 stops moving. Regardless of the number of frames in the material box, the position of the uppermost QFN frame in the material box is always kept stable.

[0044] In some optional embodiments, the frame suction and placement mechanism 2 includes a frame loading suction mechanism 21 and a frame unloading suction mechanism 22. Both the frame loading suction mechanism 21 and the frame unloading suction mechanism 22 include a suction cup fixing plate 216. Multiple spring-loaded suction cups 215 are arranged below the suction cup fixing plate 216. A frame pressure plate 214 is also arranged below the suction cup fixing plate 216. After the QFN frame 111 is lifted by the multiple spring-loaded suction cups 215 and transferred to the vacuum film-tearing platform motion mechanism 3, it is pressed onto the vacuum platform 311 by the frame pressure plate 214. The spring-loaded suction cups 215 and the frame pressure plate 214 are driven by a cylinder to move up and down. The frame loading suction mechanism 21 is used to pick up the un-torn QFN frame 111 from the frame material box 11, and the frame unloading suction mechanism 22 is used to put the film-torn QFN frame 111 into the frame material box 11.

[0045] like Figure 1 and Figure 5 As shown, the frame suction and placement mechanism 2 drives the suction mechanism to move left and right in the X direction, stopping above each set of frame material boxes 11 and the vacuum film-tearing platform 31. The frame loading suction mechanism 21 is used to pick up the QFN frame from the frame material box 11 and place it on the vacuum film-tearing platform 31 during loading, and the frame unloading suction mechanism 22 is used to pick up the QFN frame from the vacuum film-tearing platform 31 and place it into the frame material box 11 during unloading.

[0046] refer to Figure 6 The frame loading process is as follows:

[0047] (1) The front up and down cylinder 211 and the rear up and down cylinder 212 drive the suction cup fixing plate 216 and several spring buffer suction cups 215 fixed thereon to move downward, and vacuum pick up the QFN frame 111 from the frame material box 11.

[0048] (2) The front up and down cylinder 211 and the rear up and down cylinder 212 are lifted, and the motion mechanism moves the QFN frame to the top of the vacuum film tearing platform 31.

[0049] (3) The front up and down cylinder 211 and the rear up and down cylinder 212 descend to place the QFN frame on the vacuum film tearing platform 21.

[0050] (4) The upper and lower cylinders 212 are lifted, and the frame pressure plate cylinder 213 drives the frame pressure plate 214 to move downward, flattening the QFN frame and limiting the warping of the QFN frame, while waiting for the vacuum film tearing platform to position the QFN frame.

[0051] (5) Once the waiting period is completed, the front upper and lower cylinders 211 and the frame pressure plate cylinder 213 are lifted to complete the frame loading.

[0052] The structure and feeding action of the frame feeding and suction mechanism 22, as well as the type of the frame loading and suction mechanism, will not be described in detail here.

[0053] In some optional embodiments, the vacuum platform 311 of the vacuum tearing platform motion mechanism 3 is provided with an X-direction motion positioning clamp 313 and an X-direction fixed positioning block 316 on both sides along the X direction, and the vacuum platform 311 is provided with a Y-direction motion positioning clamp 312 and a Y-direction fixed positioning block 314 on both sides along the Y direction. By driving the X-direction motion positioning clamp 313 and the Y-direction motion positioning clamp 312, the QFN frame 111 is positioned to fit the X-direction fixed positioning block 316 and the Y-direction fixed positioning block 314.

[0054] like Figure 8 As shown, after the frame feeding and suction mechanism 21 places the QFN frame 111 onto the vacuum platform 311 of the vacuum film tearing platform 31, the Y-direction fixing and positioning block 314 pushes out and extends beyond the upper surface of the vacuum platform 311. The Y-direction moving positioning clamp 312 pushes the QFN frame 111 in the Y direction and presses it against the Y-direction fixing and positioning block 314, completing the positioning of the frame in the Y direction. Next, the X-direction moving positioning clamp 313 pushes the QFN frame in the X direction and presses it against the X-direction fixing and positioning block 316, completing the positioning of the frame in the X direction.

[0055] In some alternative embodiments, the vacuum platform 311 uses a plurality of sets of vacuum suction cups 317 arranged thereon to adsorb the QFN frame 111. In this embodiment, after the frame is positioned, the vacuum system generates a vacuum and uses the plurality of sets of vacuum suction cups 317 evenly distributed on the vacuum platform 311 to adsorb the QFN frame 111 onto the vacuum platform 311.

[0056] In some alternative implementations, the vacuum tearing platform 31 also includes a vacuum sensor 318 and other sensors for detecting whether the frame is correctly positioned and adsorbed.

[0057] It should also be noted that the vacuum film-tearing platform mechanism 3 includes a mechanism fixing base plate 32, a linear guide rail 33, a motion motor 34, and other parts, such as... Figure 7 As shown, the motion motor 34, linear guide rail 33, and other motion mechanisms are fixed on the mechanism fixing base plate 32, driving the vacuum film-tearing platform 31 to move back and forth in the Y direction, as shown. Figure 1 As shown, on the side closer to the operator in the Y direction, it is used to cooperate with the frame suction and placement mechanism 2 and the film separation mechanism 4. After moving along the Y direction to the side away from the operator, it is used to cooperate with the film clamping mechanism 5. There are two sets of this mechanism, located on the left and right sides of the frame loading and unloading mechanism 1.

[0058] In some optional embodiments, the film separation mechanism 4 further includes a film blowing nozzle 44, which is disposed above the film separation plate 43 and faces the film separation plate 43, and is used to blow up the film separated by the film separation plate 43.

[0059] like Figure 9 As shown, the film separation mechanism 4 includes a film separation back plate 41, film separation upper and lower cylinders 42, film separation plate 43, film blowing nozzle 44, blowing nozzle fixing block 45, and other parts. The vacuum film tearing platform 31 transports the QFN frame 311 to the area below the film separation mechanism 4. The film separation upper and lower cylinders 42 drive the film separation plate 43 and the film blowing nozzle 44 downward. The film separation plate 43 inserts into the gap between the film and the QFN frame, further separating the film from the frame. At the same time, air is blown through the film blowing nozzle 44 to ensure that the separated film does not stick back to the QFN frame. The blowing nozzle fixing block 45 is used to fix and adjust the angle of the film blowing nozzle 44. The entire device has two sets of film separation mechanisms 4, corresponding to two sets of vacuum film tearing platform mechanisms 3.

[0060] In some alternative embodiments, the film separation mechanism 4 further includes an air pressure regulating valve 46, which is disposed on the air supply line connected to the film air nozzle 44, for adjusting the air pressure and flow rate.

[0061] In some optional embodiments, the clamping motion mechanism 5 further includes a motion timing belt 52, a linear guide rail 53, and a motion motor 54. The motion motor 54 drives the film clamping mechanism 51 to move along the linear guide rail 53 via the motion timing belt 52. The film clamping mechanism 51 also includes a second film blowing nozzle 515, which is used to blow the film into the waste box after the film clamp 514 releases the clamped film.

[0062] like Figure 10As shown, the motion motor 54 drives the film clamping mechanism 51 to move in the X direction via the motion synchronous belt 52. The film clamping mechanism 51 is fixed on the linear guide rail 53, realizing the clamping of the QFN frame film on the two sets of vacuum film tearing platform mechanisms 3 and the complete separation of the film from the QFN frame. The film clamping mechanism 51 is as follows: Figure 11 As shown, the system comprises upper and lower adhesive film clamping cylinders 511, front and rear adhesive film clamping cylinders 512, adhesive film clamping cylinders 513, adhesive film clamps 514, a second adhesive film blowing nozzle 515, adhesive film detection sensors 516, and other components. When the adhesive film separation mechanism 4 separates the adhesive film from the frame to a certain length, the adhesive film clamping mechanism 51 moves to the corresponding position of the vacuum film tearing platform 31. The front and rear adhesive film clamping cylinders 512 extend forward, followed by the lower and upper adhesive film clamping cylinders 511 descending. Several adhesive film clamping cylinders 513 drive several sets of adhesive film clamps 514 fixed on them to close, firmly clamping the separated adhesive film. The vacuum film tearing platform 31 moves forward along the Y direction, completing the complete separation of the adhesive film from the frame. Each set of adhesive film clamps 514 is equipped with a pair of adhesive film detection sensors to detect whether the adhesive film clamps 514 are holding the adhesive film. After the adhesive film and the frame are completely separated, the adhesive film clamping mechanism 51 moves above the waste box, opens the adhesive film clamp 514, and blows air through the second adhesive film blowing nozzle 515, throwing the torn adhesive film into the waste box.

[0063] The overall operating procedure of the high-speed QFN frame film-tearing device provided in this application is as follows:

[0064] 1. Place the unpeeled film frames and release paper alternately in the frame material box 11.

[0065] 2. Place the frame material box 11 on the material box moving positioning track 133.

[0066] 3. The material box moving mechanism 13 moves the frame material box 11 above the frame lifting mechanism 12 and fixes it.

[0067] 4. The frame lifting mechanism 12 lifts the QFN frame in the frame material box 11 to the set position.

[0068] 5. The frame picking and placing mechanism 2 moves along the X direction to above the corresponding frame material box 11 and picks up a QFN frame.

[0069] 6. The vacuum film-tearing platform 31 moves forward along the Y direction to the loading position.

[0070] 7. The frame suction and placement mechanism 2 moves along the X direction to above the vacuum film-tearing platform 31 and places the QFN frame on the vacuum film-tearing platform 31.

[0071] 8. The vacuum tearing platform 31 positions and adsorbs the QFN frame.

[0072] 9. The frame suction and placement mechanism 2 can perform other operations.

[0073] 10. The vacuum film-tearing platform 31 performs preliminary separation of the adhesive film and transfers the QFN frame to the adhesive film separation station.

[0074] 11. The film separation mechanism 4 further separates the film and the frame.

[0075] 12. The adhesive film clamping mechanism 51 moves above the vacuum film tearing platform 31 and clamps the separated adhesive film.

[0076] 13. The vacuum film-tearing platform 31 moves forward along the Y direction to the unloading position, and the film and frame are completely separated.

[0077] 14. The adhesive film clamping mechanism 51 moves to the top of the waste box and discards the separated adhesive film.

[0078] 15. The frame suction and placement mechanism 2 moves along the X direction to above the vacuum film-tearing platform 31 and suctions the frame after film tearing.

[0079] 16. The frame suction and placement mechanism 2 places the peeled frame into the product frame material box 11.

[0080] Because the equipment is equipped with several sets of frame material boxes 11, two sets of vacuum film-tearing platforms 21, and film separation mechanism 4, the overall production efficiency can be maximized by optimizing the operation process of each mechanism and having the two sets of vacuum film-tearing platforms 21 operate alternately. The equipment takes into account the problems that may occur in each link and adopts corresponding solutions to realize the automation of each link, which can effectively maintain the quality stability of this process and reduce the generation of defective products.

[0081] The technical solution of this application has been described in conjunction with the preferred embodiments shown in the accompanying drawings. Those skilled in the art should understand that the protection scope of this application is obviously not limited to these specific embodiments. Without departing from the principles of this application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this application.

Claims

1. A high-speed film-tearing device for QFN frames, characterized in that, It includes a frame loading and unloading mechanism (1), a frame suction and placement mechanism (2), a vacuum film tearing platform motion mechanism (3), an adhesive film separation mechanism (4), and an adhesive film clamping motion mechanism (5); The frame loading and unloading mechanism (1) includes multiple frame boxes (11) for holding QFN frames (111). The frame suction and placement mechanism (2) includes a track arranged above the frame loading and unloading mechanism (1) and the vacuum film-tearing platform motion mechanism (3), and a suction mechanism moving on the track. The suction mechanism has a spring-loaded suction cup (215) for suctioning the QFN frame (111) and transporting it to the vacuum film-tearing platform motion mechanism (3). The vacuum film-tearing platform motion mechanism (3) has a vacuum platform (311) and several sets of adhesive film separators located on the vacuum platform (311). After the ejector pin (315) and vacuum platform (311) adsorb the QFN frame (111), the ejector pin (315) is driven to extend and pass through the end gap of the QFN frame (111), thereby lifting the adhesive film on the QFN frame (111). The adhesive film separation mechanism (4) includes an adhesive film separation plate (43), which is inserted between the adhesive film and the QFN frame (111) to separate the adhesive film from the QFN frame. The adhesive film clamping motion mechanism (5) includes an adhesive film clamping mechanism (51), which drives the adhesive film clamp (514) on it to clamp the adhesive film.

2. The high-speed film-tearing device for QFN frames as described in claim 1, characterized in that, The frame loading and unloading mechanism (1) further includes a frame lifting mechanism (12) and a box moving mechanism (13). The box moving mechanism (13) includes a box moving mechanism base plate (131) with a box moving positioning track (133) on it. The frame lifting mechanism (12) includes a lifting mechanism base plate (121) with a box positioning track (122) that is connected to the box moving positioning track (133). The box positioning track (122) is located below the track of the frame suction and placement mechanism (2). The end of the box moving positioning track (133) away from the box positioning track (122) is the manual operation end. The frame box (11) is driven to move on the box moving positioning track (133) and the box positioning track (122) by the driving mechanism.

3. The high-speed film-tearing device for QFN frames as described in claim 2, characterized in that, The bottom of the frame material box (11) is provided with a movable base plate (114). Multiple QFN frames (111) are stacked on the movable base plate (114). The movable base plate (114) has a movable pin (115) on its side. The movable pin (115) is inserted into the strip hole extending vertically on the side of the frame material box (11). The frame lifting mechanism (12) includes an electric push rod (123). When the QFN frame (111) moves to the material box positioning track (122), the electric push rod (123) pushes the movable base plate (114) to move vertically in the frame material box (11).

4. The high-speed film-tearing device for QFN frames as described in claim 3, characterized in that, The lifting mechanism (12) of the frame lifting mechanism (12) is provided with a column on the lifting mechanism base plate (121), and a position sensor (125) is provided at the top of the column. The position sensor (125) is facing the frame box (11) located on the box positioning track (122) to monitor the height of the QFN frame (111) stacked inside the frame box (11).

5. The high-speed film-tearing device for QFN frames as described in claim 1, characterized in that, The frame suction and placement mechanism (2) includes a frame loading suction mechanism (21) and a frame unloading suction mechanism (22). Both the frame loading suction mechanism (21) and the frame unloading suction mechanism (22) include a suction cup fixing plate (216). Multiple spring-loaded suction cups (215) are arranged below the suction cup fixing plate (216). A frame pressure plate (214) is also arranged below the suction cup fixing plate (216). The QFN frame (111) is held in place by multiple spring-loaded suction cups (215). 5) After being picked up and transferred to the vacuum film-tearing platform motion mechanism (3), the frame pressure plate (214) presses it onto the vacuum platform (311). The spring buffer suction cup (215) and the frame pressure plate (214) are driven up and down by the cylinder. The frame feeding and suction mechanism (21) is used to pick up the untorn QFN frame (111) from the frame material box (11). The frame unloading and suction mechanism (22) is used to put the tear-off QFN frame (111) into the frame material box (11).

6. The high-speed film-tearing device for QFN frames as described in claim 1, characterized in that, The vacuum platform (311) of the vacuum platform (311) is provided with an X-direction motion positioning clamp (313) and an X-direction fixed positioning block (316) on both sides along the X direction. The vacuum platform (311) is provided with a Y-direction motion positioning clamp (312) and a Y-direction fixed positioning block (314) on both sides along the Y direction. By driving the X-direction motion positioning clamp (313) and the Y-direction motion positioning clamp (312), the QFN frame (111) is positioned to fit the X-direction fixed positioning block (316) and the Y-direction fixed positioning block (314).

7. The high-speed film-tearing device for QFN frames as described in claim 1, characterized in that, The vacuum platform (311) adsorbs the QFN frame (111) through a number of sets of vacuum suction cups (317) arranged thereon.

8. The high-speed film-tearing device for QFN frames as described in claim 1, characterized in that, The adhesive film separation mechanism (4) further includes an adhesive film blowing nozzle (44), which is positioned above the adhesive film separation plate (43) and faces the adhesive film separation plate (43) to blow up the adhesive film separated by the adhesive film separation plate (43).

9. The high-speed film-tearing device for QFN frames as described in claim 8, characterized in that, The film separation mechanism (4) also includes an air pressure regulating valve (46), which is installed on the air supply line connected to the film air nozzle (44).

10. The high-speed film-tearing device for QFN frames as described in claim 1, characterized in that, The clamping motion mechanism (5) further includes a motion timing belt (52), a linear guide rail (53), and a motion motor (54). The motion motor (54) drives the film clamping mechanism (51) to move along the linear guide rail (53) via the motion timing belt (52). The film clamping mechanism (51) further includes a second film blowing nozzle (515) for blowing the film into the waste box after the film clamp (514) releases the clamped film.

Images