Supporting tool for gold wire bonding of flexible substrate

Abstract

The invention provides a supporting tool for gold wire bonding of a flexible substrate, the supporting tool comprises a bottom plate and at least one supporting assembly, the supporting assembly comprises a rotating arm and a supporting piece, and the supporting piece comprises a connecting part and a supporting part connected to the connecting part. According to the supporting tool disclosed by the invention, when the bonding pad of the flexible substrate needs to be supported, the supporting part of the supporting piece is placed below the flexible plate through the hollow area on the flexible plate, the connecting part of the supporting piece is connected to the rotating arm, and the rotating arm is rotated from the first position to the second position; according to the technical scheme, at least part of the supporting part can be moved to the position under the bonding pad, rigid supporting is provided for the bonding pad, meanwhile, operation needed for providing supporting for the bonding pad is simplified, the risk that a product is scratched is reduced, meanwhile, the technical requirement of the whole operation process is low, and the operation efficiency can be improved easily.

Description

Technical Field

[0001] The present invention relates to the technical field of microelectronic packaging, and in particular to a supporting tool for gold wire bonding of a flexible substrate. Background Art

[0002] The contents in this section merely provide background information related to the present disclosure and may not constitute prior art.

[0003] Gold wire bonding is a key technology for achieving electrical interconnection in microelectronic packaging, enabling reliable electrical connections between chips and pads on the package substrate. However, in packaging structures using flexible substrates, the pads on the flexible board within the flexible substrate are in a springy state, making it difficult to directly apply stable bonding parameters such as pressure and ultrasonic power to the bonding points on the pads during the gold wire bonding process, making it difficult to achieve reliable bonding.

[0004] Since the size of flexible substrates in the field of microelectronic packaging is generally very small, one of the current ways to improve the quality of gold wire bonding for flexible substrates is: after the flexible substrate is positioned, a metal pad is placed from the hollow area of ​​the flexible board to the bottom of the flexible board, and then the position of the metal pad is repeatedly adjusted with anti-static tweezers under a microscope until the metal pad is below the pad bonding point to provide support; after the gold wire bonding is completed, the metal pad is removed through a similar operation. As far as this method is concerned, not only is the operation cumbersome, but because the operating space under the flexible board is very small (generally less than 2mm×2mm), there is a high risk of the anti-static tweezers scratching the product during the adjustment of the metal pad, which places very high technical requirements on the operator and has low operating efficiency. Summary of the Invention

[0005] In view of this, an object of the present invention is to provide a supporting tool for gold wire bonding of a flexible substrate, so as to at least solve the problems existing in the above-mentioned solutions for improving the quality of gold wire bonding.

[0006] The purpose of the present invention is achieved through the following technical solutions:

[0007] The present invention provides a support tool for gold wire bonding of a flexible substrate, wherein the flexible substrate comprises a suspended flexible board; the flexible board is provided with a suspended pad and at least one hollow area surrounding the pad; the support tool comprises:

[0008] a bottom plate provided with a positioning portion for positioning the flexible substrate;

[0009] At least one support assembly, the support assembly comprising:

[0010] a rotating arm rotatably connected to the base plate;

[0011] A support member comprising a connecting portion and a supporting portion connected to the connecting portion; the connecting portion is detachably connected to the rotating arm so that the supporting portion can rotate along with the rotating arm between a first position and a second position;

[0012] In which, in the first position, the support portion is located below the flexible board, and the orthographic projection of the support portion on the plane of the flexible board is completely within the contour boundary of the hollow area; in the second position, at least part of the support portion is located directly below the pad.

[0013] Optionally, the support assembly further includes a fixing block, wherein the fixing block is fixedly connected to the rotating arm;

[0014] A card slot is provided on the top surface of the fixing block, and a clamping portion adapted to the card slot is provided on the connecting portion. The clamping portion is clamped in the card slot to limit the freedom of the support member in the horizontal direction.

[0015] Optionally, the fixing block is made of magnetic material;

[0016] The supporting fixture further includes a magnetic member corresponding to each of the supporting assemblies, and the magnetic member is provided on the rotation path of the corresponding rotating arm;

[0017] Wherein, in the second position, the magnetic member is magnetically positioned with the corresponding fixing block.

[0018] Optionally, the clamping portion is cross-shaped.

[0019] Optionally, the positioning portion is a positioning groove provided on the top surface of the bottom plate, and a shape of the positioning groove matches the flexible substrate.

[0020] Optionally, a notch is provided on one side of the positioning groove, and the positioning groove includes a reference surface opposite to the notch;

[0021] The supporting tooling also includes:

[0022] The positioning block comprises a positioning surface opposite to the reference surface; the positioning block is movably connected to the base plate so that the positioning surface can be close to or away from the reference surface.

[0023] Optionally, a first bolt threadedly connected to the bottom plate is provided on the top of the positioning block, and the first bolt only limits the freedom of the positioning block in the vertical direction;

[0024] A second bolt threadedly connected to the bottom plate is provided on a side wall of the positioning block, and an axial direction of the second bolt extends toward the direction where the reference plane is located.

[0025] Optionally, in the second position, the portion of the support portion directly below the pad is at an edge of the pad.

[0026] Optionally, the supporting tool further includes a base provided directly below the bottom plate;

[0027] The support assembly further includes a rotating shaft, with both ends of the rotating shaft being connected to the bottom plate and the base respectively;

[0028] One end of the rotating arm is rotatably connected to the rotating shaft; the other end of the rotating arm extends beyond the bottom plate and the base and is detachably connected to the connecting portion;

[0029] The upper and lower sides of the rotating arm are in sliding contact with the bottom plate and the base respectively.

[0030] Optionally, the bottom plate is provided with a plurality of limiting portions supported on the base, and the plurality of limiting portions are sequentially spaced along the rotation path of the rotating arm;

[0031] The rotating arm is located between two adjacent limiting portions, so that the rotating range of the rotating arm is limited by the two adjacent limiting portions.

[0032] The technical solutions of the embodiments of the present invention have at least the following advantages and beneficial effects:

[0033] The supporting tooling disclosed in the present invention, when it is necessary to provide support for the solder pad of the flexible substrate, only needs to complete the operations of placing the supporting part of the supporting member under the flexible board through the hollow area on the flexible board, connecting the connecting part of the supporting member to the rotating arm, and rotating the rotating arm from the first position to the second position, so that at least a part of the supporting part can be moved directly under the solder pad. While providing rigid support for the solder pad, it simplifies the operations required to provide support for the solder pad and reduces the risk of the product being scratched. At the same time, the entire operation process has low technical requirements and helps to improve operational efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 Schematic diagram of the structure of a typical flexible substrate known in the prior art;

[0035] Figure 2 for Figure 1 sectional view of

[0036] Figure 3 A schematic structural diagram of a support tool provided by an embodiment of the present invention in one state, showing a situation where the rotating arm and the support portion are in a first position;

[0037] Figure 4A schematic structural diagram of the support tooling provided by an embodiment of the present invention in another state, showing a situation where the rotating arm and the support portion are in a second position;

[0038] Figure 5 for Figure 4 sectional view of

[0039] Figure 6 A schematic structural diagram of a base plate provided in an embodiment of the present invention;

[0040] Figure 7 A schematic structural diagram of a bottom plate, a positioning block, and a base provided in an embodiment of the present invention;

[0041] Figure 8 A schematic structural diagram of a support assembly provided by an embodiment of the present invention;

[0042] Figure 9 for Figure 8 An exploded view of the structure of the support assembly is shown;

[0043] Figure 10 and Figure 11 A simplified diagram of the support tooling provided in an embodiment of the present invention when in use; wherein, Figure 10 shows the situation when the rotating arm together with the support portion is in the first position; Figure 11 The swivel arm together with the support portion is shown in the second position.

[0044] Icon: 10-flexible substrate, 11-base, 12-packaging groove, 13-bearing step, 14-flexible board, 15-soldering pad, 16-hollow area, 20-bottom plate, 21-positioning groove, 22-notch, 23-reference surface, 24-limiting part, 30-support assembly, 31-rotating arm, 32-support member, 321-support part, 322-connecting part, 323-clamping part, 33-fixing block, 331-clamping slot, 34-rotating axis, 40-positioning block, 41-positioning surface, 42-first bolt, 43-second bolt, 50-magnetic part, 60-base. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with specific implementation methods. The same figure marks in the accompanying drawings represent the same components. It should be noted that the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] Compared to the embodiments shown in the drawings, feasible embodiments within the scope of protection of the present invention may have fewer components, additional components not shown in the drawings, different components, differently arranged components, or differently connected components, etc. In addition, two or more components in the drawings may be implemented in a single component, or a single component shown in the drawings may be implemented as multiple separate components.

[0047] The embodiment of the present invention provides a support fixture for gold wire bonding of a flexible substrate. To facilitate the description of the support fixture provided by the embodiment of the present invention, the structure of the flexible substrate 10 of the present invention is first described below.

[0048] Figure 1 and Figure 2 The structure of a typical flexible substrate 10 in the prior art is shown. Figure 1 and Figure 2 In the illustrated flexible substrate 10, the flexible substrate 10 may include a base 11, a packaging groove 12 provided on the top of the base 11, and a flexible board 14 suspended and fixed in the packaging groove 12 via a supporting step 13. A suspended solder pad 15 is provided on the flexible board 14. For example, the solder pad 15 may be located at the center of the flexible board 14, and the flexible board 14 may be provided with at least one hollow area 16 surrounding the solder pad 15. For example, Figure 1 A flexible board 14 is shown with four cutout areas 16 surrounding the solder pads 15 .

[0049] As described in the background of the present invention, in this type of flexible substrate 10, the pads 15 are suspended and in an elastic state, which affects the smooth implementation of gold wire bonding. Although the quality of gold wire bonding can be improved by inserting metal pads through the hollow area 16 to support the bonding points on the pads 15, this method is cumbersome to operate. Because the operating space between the flexible board 14 and the bottom surface of the packaging groove 12 is very small, there is a high risk of scratching the product when adjusting the position of the metal pads. It also requires very high operator skills and has low operating efficiency.

[0050] The support tooling provided in the embodiment of the present invention is intended to provide support for the suspended pads 15 of the flexible substrate 10 having the same or similar structure as described above, while simplifying the operations required to provide support, reducing the risk of product scratches and operational difficulty, and improving operational efficiency.

[0051] Figure 3 and Figure 4 The structures of the supporting tooling provided by this embodiment in different states are respectively shown. Figure 5 for Figure 4 A cross-sectional view of the . Figures 3 to 5 In the illustrated embodiment, the support tooling may include a base plate 20 and at least one support assembly 30 .

[0052] The bottom plate 20 is provided with a positioning portion for positioning the flexible substrate 10 , that is, the positioning portion is used to fix the flexible substrate 10 .

[0053] In some possible embodiments, reference Figure 6 As shown, the positioning portion can be a positioning groove 21 provided on the top surface of the base plate 20, and the shape of the positioning groove 21 can match the outer shape of the flexible substrate 10. In actual operation, the flexible substrate 10 can be positioned by simply placing the entire flexible substrate 10 within the positioning groove 21. This design helps to simplify the operation of positioning the flexible substrate 10 on the positioning portion and improve efficiency. Of course, if convenience and efficiency are not a concern, the horizontal top surface of the base plate 20 can be directly used as the positioning portion. After the flexible substrate 10 is placed on the positioning portion, the flexible substrate 10 can be fixed with the help of other positioning tools known in the prior art.

[0054] The support assembly 30 may include a pivot arm 31 and a support member 32. The pivot arm 31 is rotatably connected to the base plate 20 so as to be capable of rotating at least horizontally between a first position and a second position. The support member 32 may include a connecting portion 322 and a support portion 321 connected to the connecting portion 322. The connecting portion 322 is detachably connected to the pivot arm 31 so that the support member 32, particularly the support portion 321, can rotate with the pivot arm 31 between the first position and the second position.

[0055] In the first position, the support portion 321 is located below the flexible board 14, and the orthographic projection of the support portion 321 on the plane of the flexible board 14 is completely within the outline of the hollow area 16. The orthographic projection of the support portion 321 on the plane of the flexible board 14 being completely within the outline of the hollow area 16 can also be understood as: the support portion 321 is completely exposed to the hollow area 16, that is, it is not blocked by the hollow area 16.

[0056] In the second position, at least a portion of the support portion 321 is located directly below the pad 15 , thereby providing rigid support for the pad 15 .

[0057] Specifically, in actual operation, assuming that in the initial state, the rotating arm 31 is in the following Figure 10 The first position shown in FIG. 1 is shown, and the connecting portion 322 of the support member 32 is not connected to the rotating arm 31, so as to facilitate positioning the flexible substrate 10 on the positioning portion of the bottom plate 20. On this basis, the support portion 321 is aligned with the hollow area 16 and allowed to pass through the hollow area 16 to reach below the flexible board 14. At this time, the support portion 321 is completely exposed to the hollow area 16. Then, the connecting portion 322 is connected to the rotating arm 31. Figure 10 Thereafter, the rotating arm 31 is operated so that the rotating arm 31 is Figure 10The first position shown is rotated to Figure 11 In the second position shown, during this process, the rotating arm 31 drives the support member 32, especially the support portion 321, to rotate from the first position completely exposed to the hollow area 16 to the second position where at least part of the support portion 321 is directly below the pad 15, thereby relying on the support portion 321 to provide rigid support for the pad 15. For details, please refer to Figure 11 The part shown by the dotted line.

[0058] After use, first operate the rotating arm 31 so that the rotating arm 31 and the supporting portion 321 are moved from Figure 11 The second position shown is rotated to Figure 10 The first position is shown, after which the support member 32 can be removed from the rotating arm 31 to facilitate removal of the flexible substrate 10 from the bottom plate 20. It should be noted that the above-mentioned process of using the support fixture is completed under a microscope.

[0059] Compared with the prior art, especially the method of manually placing metal pads under the flexible board 14, the support tooling provided by the embodiment of the present invention, by providing a rotatable rotating arm 31 and a support member 32 detachably connected to the rotating arm 31, when it is necessary to provide support for the pad 15 of the flexible substrate 10, it is only necessary to place the supporting portion 321 of the support member 32 under the flexible board 14 through the hollow area 16 on the flexible board 14, connect the connecting portion 322 of the support member 32 to the rotating arm 31, and rotate the rotating arm 31 from the first position to the second position. At least a portion of the supporting portion 321 can be moved to directly under the pad 15. While providing rigid support for the pad 15, the operation required to provide support for the pad 15 is simplified, reducing the risk of scratching the product. At the same time, the entire operation process has low technical requirements and helps to improve operational efficiency.

[0060] Reference Figure 10 and Figure 11 In some possible embodiments, the first position and the second position may be spaced 90° apart. Figure 10 and Figure 11 As for the rotating arm 31 and even the supporting portion 321, it is only necessary to rotate the rotating arm 31 90° counterclockwise to rotate from the first position to the second position.

[0061] It is understood that in order to prevent the connection portion 322 from interfering with the flexible substrate 10 during the rotation of the rotating arm 31, the connection portion 322 should at least meet the following requirements: when the support portion 321 is in the first position, the connection portion 322 is located above the flexible substrate 10 and does not contact the flexible substrate 10. For example, the support member 32 can be formed as follows: Figure 9 The Z-shaped design shown enables the connecting portion 322 to meet the above conditions.

[0062] In some possible embodiments, the number of support assemblies 30 can be configured according to actual needs. For example, the accompanying drawings of the present invention show a support fixture including two support assemblies 30, which are distributed on opposite sides of the positioning portion. In actual operation, the two support assemblies 30 can provide rigid support for the pad 15 from opposite sides of the pad 15, thereby improving the reliability of providing support for the pad 15. Figure 11 Of course, the number of support components 30 is not limited to this and is not limited here.

[0063] In some possible embodiments, even for the same type of flexible substrates 10, slight dimensional processing errors may exist between different flexible substrates 10 during mass production. In order to overcome such processing errors, flexible substrates 10 with different sizes can be reliably positioned in the positioning groove 21, such as Figure 6 As shown, a notch 22 is provided on one side of the positioning groove 21 , and the positioning groove 21 includes a reference surface 23 opposite to the notch 22 .

[0064] like Figure 7 As shown, the support fixture may further include a positioning block 40, which includes a positioning surface 41 opposite to the reference surface 23. The positioning block 40 is movably connected to the base plate 20 so that the positioning surface 41 can be moved closer to or away from the reference surface 23.

[0065] Based on the above configuration, assuming that, in the initial state, the positioning block 40 is positioned with its positioning surface 41 away from the reference surface 23, once the flexible substrate 10 is placed within the positioning groove 21, one side of the flexible substrate 10 can first be brought into contact with the reference surface 23. Next, the positioning block 40 is moved relative to the stationary base plate 20, causing the positioning surface 41 to gradually approach the flexible substrate 10 until the positioning surface 41 contacts the other side of the flexible substrate 10, thereby reliably positioning the flexible substrate 10. This design ensures that flexible substrates 10 of the same type, even those with a certain degree of dimensional tolerance, can be reliably positioned within the positioning groove 21.

[0066] Furthermore, for the same type of flexible substrate 10, generally speaking, the dimensional processing error is very small. To this end, the movable connection between the positioning block 40 and the bottom plate 20 can be achieved in the following manner.

[0067] Continue to refer to Figure 7As shown, the top of the positioning block 40 is provided with a first bolt 42 that is threadedly connected to the base plate 20. This first bolt 42 only limits the vertical freedom of the positioning block 40. In other words, the inner diameter of the hole (not shown) provided in the positioning block 40 for the first bolt 42 to pass through can be larger than the outer diameter of the shank of the first bolt 42, but smaller than the outer diameter of the end of the first bolt 42. In this way, the positioning block 40 can have horizontal freedom when the end of the first bolt 42 does not abut against the top of the positioning block 40.

[0068] A second bolt 43 is provided on the side wall of the positioning block 40, particularly the side wall facing away from the positioning surface 41, and is threadedly connected to the base plate 20. The axial direction of the second bolt 43 extends toward the reference surface 23. The second bolt 43 is rotationally connected to the positioning block 40, allowing the second bolt 43 to rotate freely relative to the stationary positioning block 40.

[0069] Based on the above arrangement, in actual operation, the first bolt 42 can be loosened appropriately to allow the positioning block 40 to have horizontal freedom. Then, the second bolt 43 can be tightened appropriately to allow the positioning block 40, particularly the positioning surface 41, to move appropriately closer to or further away from the reference surface 23. This design not only allows for the position adjustment of the positioning surface 41, but also simplifies the structure of the entire support fixture.

[0070] In some possible embodiments, reference Figure 8 and Figure 9 As shown, the support assembly 30 may further include a fixing block 33. The fixing block 33 is fixedly connected to the rotating arm 31 so as to be able to rotate synchronously with the rotating arm 31. A slot 331 is provided on the top surface of the fixing block 33.

[0071] The connecting portion 322 of the support member 32 is provided with a clamping portion 323 adapted to the clamping slot 331. The clamping portion 323 is clamped in the clamping slot 331 to limit the horizontal freedom of the support member 32. The connecting portion 322, the support portion 321 and the clamping portion 323 of the support member 32 can be an integrated structure.

[0072] It is worth noting that the above arrangement not only realizes the detachable connection between the support member 32 , especially the connecting portion 322 and the rotating arm 31 , but also helps to simplify the disassembly and assembly process of the support member 32 .

[0073] Furthermore, the engaging portion 323 may be cross-shaped. Accordingly, the engaging slot 331 may also be cross-shaped. This design can limit the support member 32 in multiple horizontal directions, ensuring that the support member 32 can accurately follow the rotating arm 31 in rotating between the first and second positions in the horizontal direction.

[0074] In some possible embodiments, considering that gold wire bonding usually lasts for a certain period of time, it is necessary to lock the position of the rotating arm 31 in the second position so that the support portion 321 can be reliably in the second position for a long time to provide rigid support for the pad 15.

[0075] To this end, the fixing block 33 can be made of magnetic material, such as magnetic hard alloy. Figure 3 and Figure 5 As shown, the support fixture may further include a magnetic member 50 corresponding one-to-one with the support assembly 30. The magnetic member 50 is disposed on the rotation path of the corresponding rotating arm 31, and in particular, may be disposed at a position aligned with the fixed block 33 in the second position. For example, the magnetic member 50 may be a permanent magnet fixedly disposed on the outer wall of the base plate 20.

[0076] Based on the above arrangement, when the pivoting arm 31 rotates from the first position to the second position, driving the fixed block 33 and the support member 32, the magnetic member 50 can be magnetically attracted to the corresponding fixed block 33, thereby temporarily locking the pivoting arm 31 in the second position. This design not only locks the pivoting arm 31 in position, but also allows the pivoting arm 31 to return to the first position by simply applying a force greater than the magnetic attraction between the magnetic member 50 and the fixed block 33, making operation simple and convenient.

[0077] In some possible embodiments, considering that for some flexible substrates 10, there may be a need to process the center of the bottom of the pad 15 during the gold wire bonding process, the embodiment of the present invention further defines that: in the second position, the portion of the support portion 321 located directly below the pad 15 is at the edge of the pad 15, as shown in FIG. Figure 11 This limitation ensures that the support portion 321 does not have a portion located in the exact center below the pad 15 , thereby making it possible to process the center of the bottom of the pad 15 .

[0078] In some embodiments, combined Figure 5 and Figure 7 As shown, the support tooling may further include a base 60 disposed below the base plate 20. The provision of the base 60 facilitates fixing the entire support tooling in a predetermined position, such as for use on a horizontal workbench.

[0079] In order to realize the rotation connection between the rotating arm 31 and the bottom plate 20, the supporting assembly 30 may further include a rotating shaft 34. The two ends of the rotating shaft 34 are connected to the bottom plate 20 and the base 60 respectively.

[0080] One end of the pivot arm 31 is rotatably connected to the rotation shaft 34. The other end of the pivot arm 31 extends beyond the base plate 20 and the base 60 and is detachably connected to the connection portion 322, particularly via the fixing block 33. Furthermore, the upper and lower sides of the pivot arm 31 are in sliding contact with the base plate 20 and the base 60, respectively.

[0081] The above design not only realizes the rotational connection between the rotating arm 31 and the base plate 20, but also, through the cooperation between the base plate 20 and the base 60, can reliably limit the freedom of the rotating arm 31 in the vertical direction, thereby ensuring that the rotating arm 31 can only rotate between the first position and the second position in the horizontal direction.

[0082] It should be noted that, when there are multiple support components 30, such as two as shown in the accompanying drawings of the present invention, Figure 5 The connection positions of the rotating arms 31 of different support assemblies 30 when connected to the corresponding rotating shafts 34 can be staggered in the height direction, so as to fully utilize the limited space between the base plate 20 and the base 60 and reduce the volume of the entire support tooling.

[0083] Furthermore, if Figure 7 As shown, the bottom plate 20 may further be provided with a plurality of limiting portions 24 supported on the base 60 , and the plurality of limiting portions 24 may be sequentially spaced along the rotation path of the rotating arm 31 . Each limiting portion 24 may be fixedly connected to the base 60 .

[0084] For a single support assembly 30, the pivoting arm 31 is located between two adjacent limiting portions 24. The two limiting portions 24 limit the pivoting arm 31's range of rotation, restricting its rotation to only between a first position and a second position. This design not only allows the pivoting arm 31 to quickly and accurately rotate between the first and second positions, but also provides reliable support for the base plate 20 through the limiting portions 24, thereby enhancing the structural strength of the entire support assembly.

[0085] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A support fixture for gold wire bonding of a flexible substrate, wherein the flexible substrate comprises a suspended flexible board; the flexible board is provided with a suspended pad and at least one hollow area surrounding the pad; characterized in that: The supporting tooling comprises: a bottom plate provided with a positioning portion for positioning the flexible substrate; At least one support assembly, the support assembly comprising: a rotating arm rotatably connected to the base plate; A support member comprising a connecting portion and a supporting portion connected to the connecting portion; the connecting portion is detachably connected to the rotating arm so that the supporting portion can rotate along with the rotating arm between a first position and a second position; In which, in the first position, the support portion is located below the flexible board, and the orthographic projection of the support portion on the plane of the flexible board is completely within the contour boundary of the hollow area; in the second position, at least part of the support portion is located directly below the pad.

2. The supporting tool for gold wire bonding of a flexible substrate according to claim 1, characterized in that: The support assembly further includes a fixing block fixedly connected to the rotating arm; A card slot is provided on the top surface of the fixing block, and a clamping portion adapted to the card slot is provided on the connecting portion. The clamping portion is clamped in the card slot to limit the freedom of the support member in the horizontal direction.

3. The supporting tool for gold wire bonding of a flexible substrate according to claim 2, characterized in that: The fixing block is made of magnetic material; The supporting fixture further includes a magnetic member corresponding to each of the supporting assemblies, and the magnetic member is provided on the rotation path of the corresponding rotating arm; Wherein, in the second position, the magnetic member is magnetically positioned with the corresponding fixing block.

4. The supporting tool for gold wire bonding of a flexible substrate according to claim 2, characterized in that: The clamping portion is cross-shaped.

5. The supporting tool for gold wire bonding of a flexible substrate according to claim 1, characterized in that: The positioning portion is a positioning groove provided on the top surface of the bottom plate, and the shape of the positioning groove matches the flexible base.

6. The supporting tool for gold wire bonding of a flexible substrate according to claim 5, characterized in that: A notch is provided on one side of the positioning groove, and the positioning groove includes a reference surface opposite to the notch; The supporting tooling also includes: The positioning block comprises a positioning surface opposite to the reference surface; the positioning block is movably connected to the base plate so that the positioning surface can be close to or away from the reference surface.

7. The supporting tool for gold wire bonding of a flexible substrate according to claim 6, characterized in that: A first bolt threadedly connected to the bottom plate is provided on the top of the positioning block, and the first bolt only limits the freedom of the positioning block in the vertical direction; A second bolt threadedly connected to the bottom plate is provided on a side wall of the positioning block, and an axial direction of the second bolt extends toward the direction where the reference plane is located.

8. The supporting tool for gold wire bonding of a flexible substrate according to claim 1, characterized in that: In the second position, the portion of the support portion directly below the pad is at an edge of the pad.

9. The supporting tool for gold wire bonding of a flexible substrate according to claim 1, characterized in that: Also included is a base disposed directly below the bottom plate; The support assembly further includes a rotating shaft, with both ends of the rotating shaft being connected to the bottom plate and the base respectively; One end of the rotating arm is rotatably connected to the rotating shaft; the other end of the rotating arm extends beyond the bottom plate and the base and is detachably connected to the connecting portion; The upper and lower sides of the rotating arm are in sliding contact with the bottom plate and the base respectively.

10. The supporting tool for gold wire bonding of a flexible substrate according to claim 9, characterized in that: The bottom plate is provided with a plurality of limiting portions supported on the base, and the plurality of limiting portions are sequentially spaced along the rotation path of the rotating arm; The rotating arm is located between two adjacent limiting portions, so that the rotating range of the rotating arm is limited by the two adjacent limiting portions.

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