A flip chip packaging structure

Abstract

The present invention relates to the field of chip packaging technology, and specifically discloses a flip-chip packaging structure, including a body, a workbench, a grasping mechanism and a positioning mechanism. The positioning mechanism includes a positioning assembly, a guide assembly and a drive assembly. There are multiple groups of positioning assemblies, and each group of positioning assemblies is vertically adjacent to each other. The positioning assembly includes two positioning pieces; there are two groups of guide assemblies, and the guide assemblies include two guide seats and guide grooves, connecting pieces and elastic reset pieces arranged on the guide seats. The guide grooves are in the shape of a "U". The connecting pieces are slidably connected to the guide grooves and fixed to the positioning pieces. The connecting pieces are connected to the elastic reset pieces. When the connecting pieces move downward, they squeeze the elastic reset pieces to deform and store force; the drive assembly drives the two positioning pieces of the same group of positioning assemblies to move closer or farther away synchronously. The packaging structure provided by the present invention realizes the precise grasping, positioning, clamping and limiting of sensor elements, thereby ensuring the efficiency and quality of sensor packaging processing.

Description

Technical Field

[0001] The present invention relates to the technical field of chip packaging, and in particular to a flip chip packaging structure. Background Art

[0002] Flip-chip packaging is a semiconductor packaging technology. Unlike traditional wire-bonding packaging, in flip-chip packaging, the chip is mounted face down on the packaging substrate or circuit board. This packaging method directly uses the solder balls or bumps on the chip to achieve electrical connection. Flip-chip packaging can also be used in the packaging process of detectors. When using flip-chip packaging in related technologies to package detectors, it is preferred to select a suitable detector chip according to the application requirements, then flip the detector chip, and accurately place the chip through a high-precision alignment system. When packaging the detector, in addition to the chip, there are also conductive copper plates, conductive silicone gaskets and other components. Multiple components need to be stacked in order during packaging. The existing packaging structure has the problem of low working efficiency when stacking multiple components.

[0003] The patent document with the authorization announcement number CN108389815B discloses a chip flip-chip packaging device, including a gripping mechanism, a horizontal positioning mechanism and a lens mechanism, wherein at least one gripping head is provided on the gripping mechanism, and the lens mechanism is installed on the gripping head; the gripping mechanism is provided on the horizontal positioning mechanism; a first wafer mechanism is provided on one side of the gripping mechanism, and the first wafer mechanism is vertically arranged with the horizontal positioning mechanism; the first wafer mechanism includes a substrate, a wafer table is provided on the substrate, and a pressure plate is installed on the wafer table; the substrate is connected to an X-axis motor and a Y-axis motor, the wafer table is connected to an R-axis motor, and the pressure plate is connected to a Z-axis motor; the gripping mechanism includes a rotary motor, a rotary motor, and a rotary motor. The motor is arranged on the horizontal positioning mechanism, and the grabbing heads are arranged at equal intervals on the turntable of the rotary motor; the grabbing heads are connected to the vacuum device through an external pipe; guide rails are arranged at equal intervals on the turntable of the rotary motor, and a slider is arranged on the grabbing head; the guide rails and the slider are connected in a coordinated manner; the horizontal positioning mechanism is a track lead mechanism, which includes a lead and a gripper conveying device, and the rotary motor is arranged on the gripper conveying device; the horizontal positioning mechanism is a plate mechanism, and a copper foil layer substrate is arranged on the plate mechanism, and a circuit pattern is drawn on the copper foil layer substrate; the plate mechanism is respectively provided with an X-axis mechanism and a Y-axis mechanism, and the X-axis mechanism and the Y-axis mechanism are used to control the horizontal movement of the copper foil layer substrate.

[0004] The flip-chip packaging equipment provided by the aforementioned patent document improves the efficiency of flip-chip packaging by using multiple gripping heads to operate simultaneously. To ensure the packaging processing quality of the detector, the placement accuracy of each component must also be ensured during the production process. During the packaging process of the detector, the conductive silicone gasket, detector chip, conductive silicone pad, conductive copper sheet, etc. need to be placed in the housing and packaged. During the packaging process, the components involved vary in size and the positions required for each component are also different. The packaging equipment of the aforementioned patent document is not convenient for quickly positioning the components according to the differences in placement. Summary of the Invention

[0005] The present invention provides a flip-chip packaging structure, which aims to solve the problem in the related art that the flip-chip packaging equipment is inconvenient to quickly locate the placement of each component according to the size difference of each component of the detector during the packaging process of the detector, thereby affecting the packaging processing efficiency of the detector.

[0006] The flip chip packaging structure of the present invention includes a body and a workbench, a gripping mechanism and a positioning mechanism arranged on the body, the gripping mechanism includes a plurality of gripping heads and a moving component that drives each of the gripping heads to move, the positioning mechanism includes a positioning component, a guide component and a driving component, the positioning components have multiple groups, and each group of the positioning components is vertically adjacent to each other, the positioning component includes two positioning members; the guide components have two groups, and the two groups of the guide components respectively guide the two positioning members of the same group of positioning components, the guide components include two guide seats and a guide groove, a connecting member and an elastic reset member arranged on the guide seat, the guide groove is in the shape of a "return", the connecting member is slidably connected to the guide groove and fixed to the positioning member, the connecting member is connected to the elastic reset member, and when the connecting member moves downward, it squeezes the elastic reset member to deform and accumulates force; the driving component drives the two positioning members of the same group of positioning components to move closer or farther away synchronously.

[0007] The beneficial effects are: improving the packaging accuracy and packaging quality of the sensor; the driving assembly, guide assembly and positioning assembly cooperate to position each component involved in the sensor one by one; specifically, the positioning member in the positioning assembly is slidably assembled through the guide groove of the connecting member and the guide assembly; the "U"-shaped guide groove of the guide assembly provides a precise trajectory for the movement of the positioning member, ensuring the movement accuracy of the positioning member, and can ensure that the positioning member moves according to the preset precise path, thereby realizing precise positioning of the component; and the two positioning members of the same group of positioning assemblies approach or move away synchronously, ensuring that when the two positioning members clamp and position the component, the force on the component is balanced, avoiding the problem of position tilt due to uneven force on the component, and further ensuring the packaging accuracy; the setting of multiple groups of positioning assemblies enables the packaging structure to adapt to the shape and size of each component involved in the sensor; the setting of the elastic reset member enables the positioning member to be smoothly reset after a packaging operation is completed, quickly shortening the preparation time of the positioning assembly, so that the positioning assembly can perform the next positioning operation faster, thereby improving the efficiency of the entire packaging process.

[0008] Preferably, the positioning member includes a moving portion and a positioning portion, the positioning portion is arc-shaped, two positioning portions of the same group of positioning components are opposite to each other, and the moving portion is fixed to the connecting member.

[0009] The beneficial effects are as follows: the curved positioning portion can better fit the edge shape of the component. For most chip components, their edges may be smooth or have a certain curvature. The curved positioning portion can closely fit the chip edge, reducing gaps and errors during positioning, ensuring that the chip does not shift during the packaging process. In addition, the two positioning portions are arranged opposite each other, and they can clamp the chip from both sides. This relative clamping method can more evenly apply the positioning force, so that the chip is stably fixed in the horizontal direction.

[0010] Preferably, the positioning assembly also includes a limiting pressure rod, a return spring and an extrusion part. A connecting part is fixed at one end of the limiting pressure rod, an arc-shaped groove is provided on the movable part, the connecting part is slidably assembled in the arc-shaped groove through the return spring, the extrusion part is fixed at the lower end of the movable part, and the upper positioning member squeezes the movable part to slide in the arc-shaped groove through the extrusion part at its lower end.

[0011] The beneficial effects are: the arrangement of the limiting pressure rod, the return spring and the extrusion part further improves the positioning accuracy of the component. After the component is placed in place, the limiting pressure rod is located on the upper side of the positioning part, and the limiting pressure rod is in contact with the upper end surface of the component inside the positioning part. As the components continue to be stacked, the extrusion part at the lower end of the upper positioning part gradually squeezes the connecting part of the lower positioning part, and pushes the connecting part to rotate in the arc groove until the limiting pressure rod deflects and avoids the lowering space of the upper positioning part.

[0012] Preferably, the number of guide grooves on the same guide seat is consistent with the number of positioning components, the transverse grooves at the upper and lower ends of each guide groove on the same guide seat are connected, the widths of each connecting member connected to the same guide seat are different, and the width of each connecting member corresponds one-to-one to the width of the vertical groove on each guide groove, and the width of the vertical groove on each guide groove decreases in the direction away from the workbench.

[0013] The beneficial effects are: ensuring the accuracy of the positioning part's movement path, each positioning component has an independent guide groove, ensuring that the movement trajectory of each positioning part is accurate and does not interfere with each other. This one-to-one matching design enables each positioning part to move accurately on the preset trajectory, avoiding the movement errors that may occur due to multiple positioning parts sharing a guide groove.

[0014] Preferably, a limit block is provided in the vertical groove of the guide groove close to the side of the workbench, and the limit block is located at the lower end of the vertical groove. The limit block is slidingly connected to the vertical groove along the depth direction of the vertical groove. The limit block is elastically connected to the vertical groove, and the upper end face of the limit block is inclined downward in the direction close to the positioning member, and the lower end face of the limit block is a plane.

[0015] The beneficial effects are: the setting of the limit block is used to further ensure that the connecting piece slides in the guide groove along a predetermined route. When the limit block moves downward in the vertical groove, it contacts the inclined surface of the limit block, squeezes and passes over the limit block. The plane at the lower end of the limit block limits the connection block from moving upward along the vertical groove, ensuring the stability of the position when the positioning piece fixes the component.

[0016] Preferably, the driving assembly includes a driving member 1, a driving member 2, a connecting block and a pushing block. The driving member 2, the connecting block and the pushing block are each provided with two. The driving member 1 drives the two connecting blocks to move synchronously closer or farther away on the body. The driving member 2 and the pushing block are installed on the connecting block. The pushing block extends into the guide seat and pushes each positioning member to slide along the guide groove in turn.

[0017] The beneficial effects are: ensuring the driving accuracy of the driving component, precise synchronous control and stable pushing process can reduce the pressure impact on the components during the positioning process and protect the components from damage. On large-scale chip packaging production lines, synchronous drive and efficient pushing design can significantly improve production efficiency, reduce equipment maintenance time and reduce production costs.

[0018] Preferably, a reset assembly is also provided on the guide seat, and the reset assembly includes a push rod, a connecting rod and a reset piece. The connecting rod is slidably assembled on the guide seat in a horizontal direction, the push rod is fixed to one end of the connecting rod, and the reset piece is vertically slidably connected to the other end of the connecting rod. The reset piece is elastically connected to the connecting rod, and a protrusion is fixed on the side of each positioning piece, and each protrusion is synchronously abutted against the push rod, and a notch is provided on the push block that is movably opposite to the reset piece.

[0019] The beneficial effects are: improving the resetting efficiency and accuracy of the positioning mechanism; a notch is provided on the push block that is opposite to the movable resetting member; this design enables the resetting member to move accurately along a preset trajectory during the resetting process; a protrusion is fixed on the side of each positioning member, and the protrusion is synchronously abutted against the push rod; this design ensures that all positioning members can be reset at the same time, thereby improving the synchronization and efficiency of the reset.

[0020] Preferably, a stopper is further provided at one end of the guide seat away from the workbench, and the end surface of the stopper opposite to the reset member is inclined from top to bottom toward the side close to the workbench, and the reset member moves upward relative to the connecting rod when sliding against the inclined side of the stopper.

[0021] The beneficial effect is that the reset member is easy to automatically separate from the push block. After the reset member moves to contact the inclined surface of the stop block, the reset member continues to move up in accordance with the inclined surface of the stop block and separates the lower end of the reset member from the push block.

[0022] Preferably, the lower end surface of the reset member is an inclined surface that slopes downward in a direction approaching the workbench.

[0023] Preferably, each of the grabbing heads is provided with a pressure rod, and the pressure rod is used to press the positioning member to move downward.

[0024] The beneficial effects of the present invention are:

[0025] (1) The packaging accuracy and packaging quality of the sensor are improved. The driving component, the guide component and the positioning component cooperate to position each component involved in the sensor one by one. Specifically, the positioning member in the positioning component is assembled by sliding with the guide groove of the guide component through the connecting member. The "U"-shaped guide groove of the guide component provides an accurate trajectory for the movement of the positioning member, ensuring the movement accuracy of the positioning member and ensuring that the positioning member moves according to the preset accurate path, thereby achieving accurate positioning of the component. The two positioning members of the same group of positioning components move closer or farther away synchronously, ensuring that the two positioning members clamp and position the component with balanced force, avoiding the problem of position tilt caused by uneven force, and further ensuring the packaging accuracy. The setting of multiple groups of positioning components enables the packaging structure to adapt to the shape and size of each component involved in the sensor. The setting of the elastic reset member allows the positioning member to be smoothly reset after a packaging operation is completed, quickly shortening the preparation time of the positioning component, so that the positioning component can perform the next positioning operation faster, thereby improving the efficiency of the entire packaging process.

[0026] (2) To ensure the accuracy of the positioning part's motion path, each positioning component has an independent guide groove to ensure that the motion trajectory of each positioning part is accurate and does not interfere with each other. This one-to-one matching design enables each positioning part to move accurately on the preset trajectory, avoiding the motion error that may occur when multiple positioning parts share a guide groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a top view of the present invention.

[0028] Figure 2 It is the front view of the present invention.

[0029] Figure 3 It is a structural diagram of the cooperation between the grabbing head and the positioning mechanism in the present invention.

[0030] Figure 4 yes Figure 3 main view.

[0031] Figure 5 It is a structural schematic diagram of the connection between the connecting piece and the guide groove in the present invention.

[0032] Figure 6 It is a top view of the positioning member in the present invention.

[0033] Figure 7 It is a three-dimensional diagram of the positioning member in the present invention.

[0034] Figure 8 It is a schematic diagram of the connection structure of the push block, the positioning member and the reset assembly in the present invention.

[0035] Reference numerals:

[0036] 1. Machine body; 2. Moving assembly; 21. Grabbing head; 22. Pressure rod; 3. Workbench; 31. Guide seat; 32. Guide groove; 321. Horizontal groove one; 322. Horizontal groove two; 323. Vertical groove one; 324. Vertical groove two; 33. Limit block; 34. Connecting part; 35. Elastic reset part; 36. Stop block; 4. Positioning part; 401. Positioning part; 402. Moving part; 41. Limiting pressure rod; 411. Connecting part; 412. Arc groove; 42. Extrusion part; 5. Driving part two; 51. Push block; 511. Notch; 52. Connecting block; 6. Connecting rod; 61. Push rod; 62. Reset part; 7. Component. DETAILED DESCRIPTION

[0037] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0038] like Figures 1 to 4 As shown, the flip-chip packaging structure of the present invention includes a body 1 and a workbench 3 provided on the body 1, a gripping mechanism and a positioning mechanism. The gripping mechanism is used to grip the component 7 to be packaged and place it on the workbench 3. The packaging structure of the present invention is used to package sensors, wherein the components 7 involved include conductive silicone gaskets, detector chips, conductive silicone pads, conductive copper sheets, etc. The gripping mechanism includes a moving component 2 and a gripping head 21. The moving component 2 is used to drive the gripping head 21 to move along the X-axis, Y-axis and Z-axis to grip the component 7. To ensure the efficiency of sensor packaging processing, multiple gripping heads 21 can be provided. Specifically, the number of gripping heads 21 can be consistent with the number of components 7 contained in the sensor. The gripping heads 21 include but are not limited to suction cups and claws. The positioning mechanism is used to position the placed component 7 when the gripping mechanism places the component 7 on the workbench 3.

[0039] The positioning mechanism includes a positioning component, a guide component and a drive component. There are multiple groups of positioning components, and the number of positioning components is consistent with the number of components 7. Each group of positioning components is arranged vertically adjacent to each other. Each group of positioning components positions each component 7 one by one to ensure the accuracy of the placement of each component 7. The drive component is used to drive the positioning component to move, and the guide component is used to guide the moving path of the positioning component.

[0040] like Figure 6 and Figure 7As shown, the positioning assembly includes two positioning members 4 and a limiting pressure rod 41 and an extrusion portion 42 arranged on the positioning members 4. The positioning member 4 includes a moving portion 402 and a positioning portion 401. The two positioning members 4 of the same group of positioning members are arranged horizontally adjacent to each other. The positioning portion 401 is arc-shaped, and the positioning portions 401 of the two positioning members 4 are opposite to each other. There are two groups of guide assemblies. The two positioning members 4 of the same group of positioning members are respectively connected to the two groups of guide assemblies through their moving portions 402.

[0041] One end of the limiting pressure rod 41 is rotatably connected to the positioning member 4. Specifically, the limiting pressure rod 41 is connected to the positioning member 4 via a connecting portion 411, which is slidably connected to the positioning member 4. An arcuate groove 412 is formed on the movable portion 402, and the connecting portion 411 is slidably assembled with the arcuate groove 412. The connecting portion 411 is fixed to one end of the limiting pressure rod 41. The connecting portion 411 is also connected to the positioning member 4 via a return spring. The extrusion portion 42 is located at the lower end of the positioning member 4. When the two positioning members 4 are vertically aligned, the extrusion portion 42 on the upper positioning member 4 squeezes the connecting portion 411 on the lower positioning member 4, causing it to slide and drive the limiting pressure rod 41 to rotate in alignment with the upper end surface of the positioning member 4.

[0042] like Figure 5 and Figure 8 As shown, the guide assembly includes a guide seat 31, a connecting member 34 and an elastic reset member 35. There are two guide seats 31, and the guide seat 31 is also provided with a plurality of "Hu"-shaped guide grooves 32. The number of connecting members 34, elastic reset members 35 and guide grooves 32 is consistent with the number of positioning assemblies. Each connecting member 34 corresponds to each positioning member 4 located on the same side and is fixedly connected. Each connecting member 34 corresponds to each guide groove 32 and is slidably connected. Each connecting member 34 is connected to each elastic reset member 35 in a one-to-one correspondence. The elastic reset member 35 can be an elastic telescopic rod. The upper end of the elastic reset member 35 is fixed to the connecting member 34, and the lower end of the elastic reset member 35 is fixed to the guide seat 31. When the connecting member 34 moves to the lower side of the guide groove 32, it squeezes the elastic reset member 35 and causes the elastic reset member 35 to accumulate force.

[0043] The guide grooves 32 include two transverse grooves and two vertical grooves, which form a "U" shape. The upper and lower transverse grooves of each guide groove 32 are connected, and each connecting member 34 slides within the corresponding guide groove 32. For the convenience of subsequent description, the upper transverse groove of the guide groove 32 is referred to as transverse groove 1 321, the lower transverse groove is referred to as transverse groove 2 322, the vertical groove close to the workbench 3 is referred to as vertical groove 1 323, and the vertical groove away from the workbench 3 is referred to as vertical groove 2 324.

[0044] like Figure 3 and Figure 8As shown, the driving assembly pushes the connecting member 34 to slide along the transverse groove 1 321. Two vertical pressure rods 22 are also fixed to the grabbing head 21. The two pressure rods 22 are vertically opposite to the positioning members 4 on both sides. The grabbing head 21 grabs the component 7 and moves it to the upper side of the workbench 3, and makes the height of the component 7 consistent with the height of the transverse groove 1 321. The driving assembly pushes the connecting member 34 to move opposite to the vertical groove 1 323. The positioning parts 401 of the two positioning members 4 fit the component 7 and clamp it firmly. The lower ends of the two pressure rods 22 abut against the moving parts 402 of the two positioning members 4. The grabbing head 21 continues to move downward. The two pressure rods 22 push the two positioning members 4 to move downward synchronously with the grabbing head 21. The connecting member 34 moves downward along the corresponding vertical groove 1 323, and squeezes the elastic reset member 35 when moving downward to accumulate force.

[0045] The elastic return member 35 is used to release the elastic force to return the positioning member 4 to its original position after a packaging operation is completed. To prevent the elastic return member 35 from driving the positioning member 4 to its original position before the packaging operation is completed, a stop block 33 is provided inside the first vertical groove 323. The stop block 33 is located at the lowermost side of the first vertical groove 323 and is slidably mounted within the first vertical groove 323. The stop block 33 slides along the depth direction of the first vertical groove 323. The upper end surface of the stop block 33 is an inclined surface, while the lower end surface of the stop block 33 is a flat surface. The upper end surface of the stop block 33 is inclined downward in a direction approaching the positioning member 4. When the connecting member 34 moves downward along the first vertical groove 323 to the lower end of the first vertical groove 323, the lower end of the connecting member 34 contacts the inclined surface of the stop block 33 and squeezes and passes over the stop block 33 to enter the second horizontal groove 322. The flat surface of the lower end of the stop block 33 contacts the upper end surface of the connecting member 34, preventing the connecting member 34 from moving upward. At this time, the positioning member 4 also places the component 7 in place, and the positioning member 4 located inside the second transverse groove 322 fits against the side of the component 7 to position the component 7.

[0046] The limiting pressure rod 41 further limits the position of the component 7. After the component 7 is lowered, the two positioning members 4 limit the position of the component 7 on both sides of the component 7. The limiting pressure rod 41 is in the initial state. In the initial state, the return spring is in a naturally extended state. The limiting pressure rod 41 is located on the upper side of the positioning part 401. The limiting pressure rod 41 is in contact with the upper end surface of the component 7 inside the positioning part 401. As the components 7 continue to be stacked, the upper positioning member 4 is pressed on the lower positioning member 4 as the component 7 is placed. In the process of the upper positioning member 4 moving downward to fit the lower positioning member 4, the squeezing portion 42 at the lower end of the positioning member 4 gradually squeezes the connecting portion 411 and pushes the connecting portion 411 to rotate in the arc groove 412 until the limiting pressure rod 41 deflects and avoids the lowering space of the upper positioning member 4. The return spring connected to the connecting portion 411 is squeezed and stored.

[0047] like Figure 3 and Figure 8As shown, the driving assembly includes a driving member 1, a driving member 2 5, a connecting block 52 and a pushing block 51. There are two driving members 2 5, two connecting blocks 52 and two pushing blocks 51. The two connecting blocks 52 are slidably connected to the body 1. The driving member 1 drives the two connecting blocks 52 to move closer or farther away synchronously. The sliding direction of the two connecting blocks 52 is parallel to the direction of the transverse groove. The driving member 2 5 and the pushing block 51 are installed on the connecting block 52. The driving member 2 5 can be a cylinder. The protruding end of the driving member 2 5 is connected to the pushing block 51. The driving member 2 5 pushes the pushing block 51 to move vertically. The pushing block 51 extends into the guide seat 31 and pushes each positioning member 4 in turn to slide along the transverse groove 1 321 to the position corresponding to the vertical groove 1 323.

[0048] like Figure 8 As shown, to ensure that after the sensor packaging operation is completed, each group of positioning components smoothly returns to the initial state, ensuring the smooth progress of subsequent packaging operations. The guide seat 31 is also provided with a reset assembly, which includes a push rod 61, a connecting rod 6 and a reset member 62. The guide seat 31 is also provided with a horizontal slide groove, in which the connecting rod 6 is slidably arranged. The connecting rod 6 is connected to the slide groove by a spring. The side facing the workbench 3 is regarded as the front side. The push rod 61 is fixed to the front end of the connecting rod 6 and is arranged vertically. A protrusion is fixed to the side of each moving part 402. When each group of clamping assemblies clamps each component 7, the protrusions on each moving part 402 on the same side simultaneously fit with the push rod 61. A guide block is fixed to the rear end of the connecting rod 6. A reset member 62 is vertically slidably connected to the guide block and is elastically connected to the guide block. The lower end surface of the reset member 62 is inclined, sloping forward and downward from the right rearward end. The push block 51 is provided with a notch 511 that movably opposes the reset member 62. A stopper 36 is also fixed to the rear side of the upper end surface of the guide seat 31. The front end surface of the stopper 36 is an inclined surface that tilts from top to bottom toward the front side. When the reset member 62 moves to the rear end of the guide seat 31, the upper end of the reset member 62 abuts the inclined surface of the stopper 36.

[0049] After the component 7 is packaged, the second driver 5 drives the push block 51 to move forward. As the push block 51 moves, the front end surface of the push block 51 contacts the inclined surface at the lower end of the reset member 62 and squeezes the reset member 62, causing the reset member 62 to move downward. When the reset member 62 is opposite the notch 511 on the push block 51, the reset member 62 is inserted into the notch 511 of the push block 51 under the action of the elastic force. The second driver 5 then pulls the push block 51 backward to reset. The reset member 62 moves backward synchronously with the push block 51. The reset member 62 also pulls the connecting rod 6 and the push rod 61 backward. When the connecting rod 6 moves backward, it squeezes the spring connected to it, deforms it, and accumulates force. When the push rod 61 moves backward, it pushes each push block 51 to move backward, thereby driving each positioning member 4 to move backward. After the positioning member 4 moves to the position opposite to the vertical groove 2 324 of the corresponding guide groove 32, the elastic force of the elastic reset member 35 is released, and the corresponding positioning member 4 is pushed up along the vertical groove 2 324. After the reset member 62 moves to contact the stop block 36, it gradually slides down along the inclined surface of the stop block 36. The lower end of the reset member 62 is separated from the push block 51, and the connecting rod 6 slides forward along the slide groove under the elastic force of the spring and resets.

[0050] To ensure that each positioning member 4 slides only within its corresponding guide groove 32, the width of each connecting member 34 is different, and the width of the vertical groove 1 323 and the vertical groove 2 324 on each guide groove 32 corresponds to the width of each connecting member 34, respectively, and the width of each vertical groove 1 323 and each vertical groove 2 324 decreases from front to back.

[0051] The specific working process of the flip chip packaging structure provided by the present invention when packaging a sensor is as follows:

[0052] Component 7 is grabbed and preliminarily positioned, the grabbing mechanism starts working, and the moving assembly 2 drives the grabbing head 21 to move along the X-axis, Y-axis and Z-axis to the position of the component 7 to be packaged. The grabbing head 21 grabs the conductive silicone gasket, detector chip, conductive silicone pad, conductive copper sheet and other components 7 through its grabbing device according to the shape and size of the component 7. The grabbing head 21 moves the grabbed component 7 to the upper side of the workbench 3. At this time, the height of the component 7 is consistent with the height of the horizontal groove 1 321 in the positioning mechanism. The driving assembly starts working, the driving member 1 drives the two connecting blocks 52 to approach synchronously, and the connecting block 52 drives the driving member 2 5 and the push block 51 to move. The push block 51 extends into the guide seat 31 and pushes the corresponding positioning member 4 to slide along the horizontal groove 1 321 to a position opposite to the vertical groove 1 323.

[0053] Clamping and positioning of component 7: When the positioning member 4 moves to a position opposite to the vertical groove 1 323, the positioning portions 401 of the two positioning members 4 fit the component 7 and clamp the component 7. At this time, the two vertical pressure rods 22 fixed on the grabbing head 21 are vertically opposite to the positioning members 4 on both sides, and the lower ends of the pressure rods 22 abut against the moving portions 402 of the positioning members 4. The grabbing head 21 continues to move downward, and the two pressure rods 22 push the two positioning members 4 to move downward synchronously with the grabbing head 21. The connecting member 34 moves downward along the corresponding vertical groove 1 323, and squeezes the elastic reset member 35 while moving downward so that the elastic reset member 35 accumulates force. When the connecting member 34 moves downward along the vertical groove 1 323 to the lower end of the vertical groove 1 323, the lower end of the connecting member 34 contacts the inclined surface of the limit block 33 and squeezes and passes over the limit block 33 to enter the horizontal groove 2 322. At this time, the plane of the lower end of the limit block 33 fits with the upper end surface of the connecting member 34, preventing the connecting member 34 from moving upward, and the component 7 is placed in place. The positioning member 4 located inside the second transverse groove 322 fits with the side of the component 7 to locate the position of the component 7.

[0054] When the components 7 are stacked, after they are in place, the limiting pressure rod 41 is located on the upper side of the positioning portion 401. The limiting pressure rod 41 abuts against the upper end surface of the component 7 inside the positioning portion 401. As the components 7 continue to be stacked, the upper positioning member 4 is pressed against the lower positioning member 4 as the components 7 are placed. As the upper positioning member 4 moves downward to abut against the lower positioning member 4, the squeezing portion 42 at the lower end of the positioning member 4 gradually squeezes the connecting portion 411 and pushes the connecting portion 411 to rotate within the arc-shaped groove 412 until the limiting pressure rod 41 deflects and clears the lowering space for the upper positioning member 4.

[0055] After the encapsulation operation is completed and the component 7 is encapsulated, the second driver 5 drives the push block 51 to move forward. When the push block 51 moves, the front end surface of the push block 51 contacts the inclined surface at the lower end of the reset member 62 and squeezes the reset member 62, causing the reset member 62 to move downward. When the reset member 62 is opposite to the notch 511 on the push block 51, the reset member 62 is inserted into the notch 511 of the push block 51 under the action of elastic force. Afterwards, the second driver 5 pulls the push block 51 backward to reset. The reset member 62 moves backward synchronously with the push block 51. The reset member 62 simultaneously pulls the connecting rod 6 and the push rod 61 backward. When the connecting rod 6 moves backward, it squeezes the spring connected to it, deforming it and storing force. When the push rod 61 moves backward, it pushes each push block 51 backward, thereby driving each positioning member 4 backward.

[0056] When the positioning member 4 moves to face the corresponding second vertical slot 324 of the guide slot 32, the elastic force of the elastic return member 35 is released, pushing the corresponding positioning member 4 upward along the second vertical slot 324. After the return member 62 moves to contact the stopper 36, it gradually slides down along the inclined surface of the stopper 36, and the lower end of the return member 62 disengages from the push block 51. At this point, the connecting rod 6 slides forward along the slide slot under the elastic force of the spring and resets, smoothly returning each positioning assembly group to its initial state, ready for subsequent packaging operations.

[0057] The flip chip packaging structure provided by the present invention realizes accurate grasping, positioning, clamping and limiting of the sensor element through the coordinated work of the grasping mechanism and the positioning mechanism, thereby ensuring the efficiency and quality of the sensor packaging process.

[0058] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A flip chip packaging structure, comprising a body (1), a workbench (3) arranged on the body (1), a gripping mechanism and a positioning mechanism, wherein the gripping mechanism comprises a plurality of gripping heads (21) and a moving assembly (2) for driving each of the gripping heads (21) to move, characterized in that: The positioning mechanism includes a positioning assembly, a guide assembly and a drive assembly. The positioning assembly has multiple groups, and each group of the positioning assemblies is vertically adjacent to each other. The positioning assembly includes two positioning members (4); There are two groups of guide assemblies, and the two groups of guide assemblies respectively guide the two positioning members (4) of the same group of positioning assemblies. The guide assemblies include two guide seats (31) and guide grooves (32), connecting members (34) and elastic reset members (35) provided on the guide seats (31). The guide grooves (32) are in a "return" shape. The connecting members (34) are slidably connected to the guide grooves (32) and fixed to the positioning members (4). The connecting members (34) are connected to the elastic reset members (35). When the connecting members (34) move downward, they squeeze the elastic reset members (35) to deform and store force. The driving assembly drives the two positioning members (4) of the same group of positioning assemblies to move closer or farther away synchronously.

2. The flip chip packaging structure according to claim 1, wherein: The positioning member (4) comprises a moving portion (402) and a positioning portion (401), the positioning portion (401) is arc-shaped, the two positioning portions (401) of the same group of positioning components are opposite to each other, and the moving portion (402) is fixed to the connecting member (34).

3. The flip chip packaging structure according to claim 2, wherein: The positioning assembly further includes a limiting pressure rod (41), a return spring and an extrusion portion (42), wherein a connecting portion (411) is fixed to one end of the limiting pressure rod (41), an arc-shaped groove (412) is provided on the movable portion (402), the connecting portion (411) is slidably assembled in the arc-shaped groove (412) through the return spring, the extrusion portion (42) is fixed to the lower end of the movable portion (402), and the upper positioning member (4) squeezes the movable portion (402) through the extrusion portion (42) at its lower end to slide in the arc-shaped groove (412).

4. The flip chip packaging structure according to claim 1, wherein: The number of guide grooves (32) on the same guide seat (31) is consistent with the number of positioning assemblies, the transverse grooves at the upper and lower ends of each guide groove (32) on the same guide seat (31) are connected, the widths of each connecting member (34) connected to the same guide seat (31) are different, and the width of each connecting member (34) corresponds to the width of the vertical groove on each guide groove (32) one by one, and the width of the vertical groove on each guide groove (32) decreases in a direction away from the workbench (3).

5. The flip chip packaging structure according to claim 4, wherein: A limit block (33) is provided in the vertical groove of the guide groove (32) close to the workbench (3). The limit block (33) is located at the lower end of the vertical groove. The limit block (33) is slidably connected to the vertical groove along the depth direction of the vertical groove. The limit block (33) is elastically connected to the vertical groove. The upper end surface of the limit block (33) is inclined downward in a direction close to the positioning member (4), and the lower end surface of the limit block (33) is a plane.

6. The flip chip packaging structure according to claim 1, wherein: The driving assembly includes a driving member 1, a driving member 2 (5), a connecting block (52) and a pushing block (51). The driving member 2 (5), the connecting block (52) and the pushing block (51) are each provided with two. The driving member 1 drives the two connecting blocks (52) to move synchronously closer to or farther away from each other on the machine body (1). The driving member 2 (5) and the pushing block (51) are installed on the connecting block (52). The pushing block (51) extends into the guide seat (31) and sequentially pushes each positioning member (4) to slide along the guide groove (32).

7. The flip chip packaging structure according to claim 6, wherein: The guide seat (31) is also provided with a reset assembly, which includes a push rod (61), a connecting rod (6) and a reset member (62). The connecting rod (6) is slidably assembled on the guide seat (31) in the horizontal direction. The push rod (61) is fixed to one end of the connecting rod (6). The reset member (62) is vertically slidably connected to the other end of the connecting rod (6). The reset member (62) is elastically connected to the connecting rod (6). A protrusion is fixed to the side of each positioning member (4). Each protrusion is synchronously abutted against the push rod (61). The push block (51) is provided with a notch (511) that is movable relative to the reset member (62).

8. The flip chip packaging structure according to claim 7, wherein: A stopper is further provided at one end of the guide seat (31) away from the workbench (3), and the end surface of the stopper opposite to the reset member (62) is inclined from top to bottom toward the side close to the workbench (3), and the reset member (62) moves upward relative to the connecting rod (6) when sliding against the inclined side of the stopper.

9. The flip chip packaging structure according to claim 7, wherein: The lower end surface of the reset member (62) is an inclined surface that slopes downward in a direction close to the workbench (3).

10. The flip chip packaging structure according to claim 1, wherein: Each of the grabbing heads (21) is provided with a pressure rod (22), and the pressure rod (22) is used to press the positioning member (4) to move downward.

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