Multifunctional conversion jig and chip mounting machine table

Abstract

The utility model relates to a multifunctional conversion jig and a chip mounting machine table, and relates to the technical field of chip packaging, the multifunctional conversion jig comprises a first carrier plate and a second carrier plate, the first carrier plate comprises a positioning device, the second carrier plate is fixed on one side of the first carrier plate along a first direction through the positioning device, and the first direction is perpendicular to a plane where the first carrier plate is located. Thus, flexible switching of carriers of different sizes and types in the same machine table can be achieved, accurate positioning of the second carrier plate in the first direction, the second direction and the third direction can be achieved through the multi-point positioning function of the multiple positioning needles, the positioning adsorption function of the vacuum holes and the limiting function of the positioning blocks, the switching flexibility of the carriers is improved, and the switching efficiency of the carriers is improved. The chip mounting precision is improved, and the production line efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of chip packaging, and in particular to a multifunctional conversion jig and a chip mounting machine. BACKGROUND

[0002] With the rapid development of semiconductor technology, chips are widely used in various electronic products and industries, and the size and type of chip jigs are increasingly diversified. However, the packaging equipment can only be used for product operation of a single size and a single type of jig. If the same packaging equipment needs to operate other types or sizes of products, the machine needs to be modified or redesigned, which not only increases the cost of equipment manufacturing and switching time, but also limits the flexibility of the production line.

[0003] Therefore, how to realize the switching of jigs of different sizes and types in the same machine to improve the flexibility of the production line has become a technical problem to be solved by those skilled in the art. CONTENT OF THE INVENTION

[0004] In order to solve the above technical problems, the present disclosure provides a multifunctional conversion jig and a chip mounting machine for realizing flexible switching of jigs of different sizes and types in the same machine and improving the flexibility of the production line.

[0005] In a first aspect, the present disclosure provides a multifunctional conversion jig, comprising: a first carrier plate and a second carrier plate, the first carrier plate comprising a positioning device, the second carrier plate being fixed to one side of the first carrier plate along a first direction through the positioning device, the first carrier plate and the second carrier plate being different in shape.

[0006] The first direction is perpendicular to the plane in which the first carrier plate is located.

[0007] Optionally, the positioning device comprises at least three positioning pins, and the positioning pins at least partially protrude from the surface of the first carrier plate.

[0008] Optionally, the positioning pins are located outside the contour of the second carrier plate.

[0009] At least part of the positioning pins are located in a second direction, and at least part of the positioning pins are located in a third direction, the second direction being parallel to the plane in which the first carrier plate is located, the third direction being parallel to the plane in which the first carrier plate is located, and the second direction intersecting the third direction.

[0010] Optionally, the positioning pins comprise first positioning pins and second positioning pins, and at least two first positioning pins are arranged on both sides of the second carrier plate along the diameter direction of the second carrier plate.

[0011] At least two of the second positioning needles are arranged on one side of the second carrier plate along the same side of the two first positioning needles.

[0012] Optionally, the positioning device comprises at least two vacuum holes, and a projection of the second carrier plate in the first direction covers the vacuum holes.

[0013] Optionally, the first carrier plate comprises at least two pairs of vacuum holes, the first carrier plate comprises a first diameter and a second diameter, at least one pair of the vacuum holes is arranged on both sides of the center of the first carrier plate along the direction of the first diameter, and at least one pair of the vacuum holes is arranged on both sides of the center of the first carrier plate along the direction of the second diameter.

[0014] The extension direction of the first diameter is perpendicular to the extension direction of the second diameter.

[0015] Optionally, the positioning device comprises one positioning block, the positioning block is fixed to the first carrier plate by a fastener,

[0016] The first carrier plate comprises at least one first through hole, the positioning block comprises at least one second through hole, and the projections of the first through hole and the second through hole in the first direction overlap.

[0017] The positioning block is fixed to the first carrier plate by the fastener, and the fastener is located in the first through hole and the second through hole.

[0018] The positioning block is located on one side of the second carrier plate along a second direction, or

[0019] The positioning block is located on one side of the second carrier plate along a third direction.

[0020] The second direction is parallel to the plane where the first carrier plate is located, the third direction is parallel to the plane where the first carrier plate is located, and the second direction intersects the third direction.

[0021] Optionally, the positioning block is detachably connected to the first carrier plate.

[0022] In a second aspect, based on the same inventive concept, a chip mounter comprises the multifunctional conversion jig of the first aspect.

[0023] Compared with the prior art, the technical scheme provided by the embodiments of the present disclosure has the following advantages:

[0024] Through the multi-point positioning function of the plurality of positioning needles, the positioning and adsorption function of the vacuum holes, and the limiting function of the positioning block, accurate positioning of the second carrier plate in the first direction, the second direction and the third direction can be realized, and the flexibility of carrier switching is improved.

[0025] The multifunctional conversion jig is simple in structure, reliable, can realize free switching, accurate positioning, saves manpower and time, can realize flexible switching of different sizes and types of jigs in the same machine, does not need to switch the machine device, can realize packaging requirements of different products, improves the flexibility of the production line and the flexibility of the machine, and further improves the production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0026] The accompanying drawings, which are incorporated herein and constitute part of the specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the disclosure.

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the accompanying drawings required to be used in the embodiments or prior art description will be briefly introduced. Obviously, those skilled in the art can obtain other drawings according to these drawings without any creative effort.

[0028] Figure 1 Fig. 1 shows a structural schematic diagram of a multifunctional conversion jig provided by an embodiment of the present disclosure;

[0029] Figure 2 Fig. 2 shows a side view of Figure 1 ;

[0030] Figure 3 Fig. 3 shows a structural schematic diagram of a first carrier plate provided by an embodiment of the present disclosure;

[0031] Figure 4 Fig. 4 shows a schematic diagram of the relative position relationship between a first through hole and a second through hole provided by an embodiment of the present disclosure. DETAILED DESCRIPTION

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the accompanying drawings required to be used in the embodiments or prior art description will be briefly introduced. Obviously, those skilled in the art can obtain other drawings according to these drawings without any creative effort.

[0033] In the following description, many specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure can also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only part of the embodiments of the present disclosure, not all the embodiments.

[0034] Figure 1 Fig. 1 shows a structural schematic diagram of a multifunctional conversion jig provided by an embodiment of the present disclosure, Figure 2 Fig. 2 shows a side view of Figure 1 ; Figure 3 Fig. 3 shows a structural schematic diagram of a first carrier plate provided by an embodiment of the present disclosure, please refer to Figures 1 to 3The present disclosure provides a multifunctional conversion jig 100, comprising a first carrier plate 10 and a second carrier plate 20, the first carrier plate 10 comprises a positioning device 00, and the second carrier plate 20 is fixed on one side of the first carrier plate 10 along a first direction D1 by the positioning device 00, and the first direction D1 is perpendicular to the plane where the first carrier plate 10 is located.

[0035] Specifically, the multifunctional conversion jig 100 comprises the first carrier plate 10 and the second carrier plate 20, the first carrier plate 10 comprises the positioning device 00, the positioning device 00 can fix the second carrier plate 20 on one side of the first carrier plate 10, and the shapes of the first carrier plate 10 and the second carrier plate 20 are different. In an optional embodiment provided by the present disclosure, the first carrier plate 10 can be directly used as a carrier for chip mounting, and in another optional embodiment provided by the present disclosure, the second carrier plate 20 is fixed on one side of the first carrier plate 10 along the first direction D1 by the positioning device 00, the second carrier plate 20 can be directly used as a carrier for chip mounting, and the first carrier plate 10 can be regarded as a bearing table of the second carrier plate 20. For example, the first carrier plate 10 can be a square, circular, circular-like, polygonal or the like metal carrier plate, and the shape of the first carrier plate 10 is not limited in the present disclosure; the second carrier plate 20 can be a ring-shaped carrier, and the second carrier plate 20 comprises a notch, which can be triangular or linear at the edge of the circular ring, and the notch is used for limiting the second carrier plate 20 corresponding to the positioning device 00 on the first carrier plate 10. The shape of the second carrier plate 20 is not limited in the present disclosure, as long as the area of the second carrier plate 20 is relatively small compared with the first carrier plate 10, so that the positioning device 00 can position the second carrier plate 20.

[0036] In this way, by setting the multifunctional conversion jig 100 with the positioning device 00, flexible switching of different sizes and types of carriers in the same machine can be realized, and production flexibility and machine flexibility can be improved. For example, when the first carrier plate 10 is used alone as a carrier for chip mounting, large-area chip mounting can be performed based on the large size of the first carrier plate 10; when the second carrier plate 20 is positioned on the first carrier plate 10 and used as a carrier for chip mounting, small-area chip mounting can be performed based on the small size of the second carrier plate 20, that is, different sizes of chip mounting can be realized without switching the machine, and the flexibility of the machine is improved. Compared with the case without the positioning device, the position deviation is easy to occur when the carrier is placed on another carrier with different shape by manual positioning with the naked eye, or the efficiency is low and multiple people are needed to work simultaneously by using the existing tape fixing method, so that the switching accuracy can be improved, the switching time can be shortened, and the production line efficiency can be improved.

[0037] It should be noted that when the chip needs to be tested or packaged, since the single chip is relatively fragile, multiple chips need to be arranged on the carrier in a specific arrangement form. When the first carrier plate 10 or the second carrier plate 20 is used for chip mounting or testing, the surface of the first carrier plate 10 or the second carrier plate 20 includes an adhesive film layer for improving the adhesion of chip mounting.

[0038] Please refer to Figures 1 to 3 In an optional embodiment provided by the present disclosure, the positioning device 00 includes at least three positioning needles 01, and the positioning needles 01 at least partially protrude from the surface of the first carrier plate 10.

[0039] Specifically, the positioning device 00 includes the positioning needles 01, which can be protruding structures fixed on the surface of the first carrier plate 10, such as bumps, columns, etc. fixed on the surface of the first carrier plate 10. The positioning needles 01 can also be detachable structures, for example, the positioning needles 01 can be bolts which can be fixed on the first carrier plate 10 and can also be detached from the first carrier plate 10. Correspondingly, when the positioning needles 01 are bolts, the corresponding positions on the first carrier plate 10 should include through holes for the bolts to pass through. When the second carrier plate 20 is placed on the first carrier plate 10, at least part of the positioning needles 01 on the first carrier plate 10 are located in the notch on the second carrier plate 20, so that the second carrier plate 20 can be positioned and the horizontal position deviation caused by carrier switching can be reduced.

[0040] Please refer to Figure 3 In an optional embodiment provided by the present disclosure, at least two first positioning needles 011 are arranged on both sides of the second carrier plate 20 along the diameter direction of the second carrier plate 20, for realizing the positioning of the second carrier plate 20 in the third direction D3, and at least two second positioning needles 012 are located on the same side of the two first positioning needles 01, for realizing the positioning of the second carrier plate 20 in the second direction D2. The present disclosure does not make specific limitation on the form of the positioning needles 01, as long as they at least partially protrude from the surface of the first carrier plate 10.

[0041] For example, the positioning device 00 includes at least three positioning needles 01, and the number of the positioning needles 01 can be three, four, five, etc. Here, they are not listed one by one, as long as they can meet the positioning function required by the process.

[0042] It should be noted that the multiple positioning needles 01 have a spacing on the first carrier plate 10, and the spacing between the positioning needles 01 can be set according to the size of the second carrier plate 20 which needs to be fixed, and the present disclosure does not make specific limitation thereon.

[0043] In this way, when the positioning device 00 on the first carrier plate 10 includes the positioning needles 01, the second carrier plate 20 can be fixed on the first carrier plate 10 through the multi-point positioning function of the multiple positioning needles 01, so as to prevent the second carrier plate 20 from moving and improve the stability of chip mounting.

[0044] Please refer to Figure 1 In an optional embodiment provided by the present disclosure, the positioning needles 01 are located at the contour periphery of the second carrier plate 20.

[0045] At least part of the positioning needles 01 are located in the second direction D2, and at least part of the positioning needles 01 are located in the third direction D3. The second direction D2 is parallel to the plane where the first carrier plate 10 is located, the third direction D3 is parallel to the plane where the first carrier plate 10 is located, and the second direction D2 intersects the third direction D3.

[0046] Specifically, in the direction parallel to the plane where the first carrier plate 10 is located, the positioning needles 01 are located at the contour periphery of the second carrier plate 20. The positioning device 00 includes at least 3 positioning needles 01. Exemplarily, the second direction D2 is the Y direction, the third direction D3 is the X direction, the X direction is perpendicular to the Y direction, at least one positioning needle 01 is located in the X direction of the second carrier plate 20, and at least two positioning needles 01 are located in the Y direction of the second carrier plate 20. Further, in the X direction, the positioning needles 01 are located on at least one side of the second carrier plate 20, and in the Y direction, the positioning needles 01 are located on at least one side of the second carrier plate 20. Since the positioning needles 01 are arranged in the X direction and the Y direction, the precise positioning of the second carrier plate 20 in the X and Y directions can be achieved, and the deviation is reduced.

[0047] It should be noted that the second direction D2 and the third direction D3 do not have to be perpendicular. The above is only an example and does not represent the actual direction of the second direction D2 and the third direction D3. The present disclosure does not specifically limit the actual direction, but only requires that the second direction D2 intersects the third direction D3.

[0048] In this way, by arranging the positioning needles 01 in the second direction D2 and the third direction D3, the precise positioning of the second carrier plate 20 in the second direction D2 and the third direction D3 can be achieved, the deviation probability of the second carrier plate 20 is reduced, and the chip mounting precision is improved.

[0049] Please refer to Figure 1 and Figure 3 In an optional embodiment provided by the present disclosure, the positioning device 00 includes at least two vacuum holes 02, and the projection of the second carrier plate 20 on the first direction D1 covers the vacuum holes 02.

[0050] Specifically, the first carrier plate 10 includes a plurality of vacuum holes 02, and the projection of the second carrier plate 20 on the first carrier plate 10 covers the vacuum holes 02 in the direction perpendicular to the plane where the first carrier plate 10 is located. In this way, when the multifunctional conversion jig 100 is placed on the chip mounting machine, the machine can adsorb the second carrier plate 20 through the vacuum holes 02 to make it safe and stable, and not deviate in the first direction D1.

[0051] Please refer to Figure 1 andFigure 3 In an optional embodiment provided in the present disclosure, the first carrier plate 10 includes at least two pairs of vacuum holes 02, the first carrier plate 10 includes a first diameter R1 and a second diameter R2, at least one pair of vacuum holes 02 is arranged on both sides of the center of the first carrier plate 10 along the direction of the first diameter R1, that is, at least one pair of vacuum holes 02 is arranged on both sides of the center of the first carrier plate 10 along the third direction D3; at least one pair of vacuum holes 02 is arranged on both sides of the center of the first carrier plate 10 along the direction of the second diameter R2, that is, at least one pair of vacuum holes 02 is arranged on both sides of the center of the first carrier plate 10 along the second direction D2; the extension direction of the first diameter R1 and the extension direction of the second diameter R2 are perpendicular. The shape of the vacuum hole 02 is long strip-shaped, the vacuum hole 02 penetrates the first carrier plate 10, when the second carrier plate 20 is placed on the first carrier plate 10, at least part of the positioning needle 01 on the first carrier plate 10 is located in the notch of the second carrier plate 20, the vacuum hole 02 on the first carrier plate 10 is covered by the second carrier plate 20 in the first direction D1, when the machine is vacuumized, under the action of negative pressure, due to the existence of the vacuum hole 02, the second carrier plate 20 is tightly attached to the first carrier plate 10 in the first direction D1, and the second carrier plate 20 is limited; compared with the case that the second carrier plate 20 is attached to the first carrier plate 10 by means of adhesive and the like without the vacuum hole 02, the structure in the present disclosure is simple, does not need another processing sequence, the negative pressure generated by the vacuum is large, and the attachment between different carriers is more firm.

[0052] It should be noted that the shape of the vacuum hole 02 in the drawing is only schematic, and does not represent the actual shape of the vacuum hole 02 in actual production. Alternatively, the shape of the vacuum hole 02 can also be circular, square, rhombic, polygonal or other shapes, and the actual process is specific. The present disclosure does not make specific limitations.

[0053] Specifically, 2 vacuum holes 02 are located in the second direction D2, and 2 vacuum holes 02 are located in the third direction D3. Compared with the case that the vacuum hole 02 is arranged in only one direction, the vacuum hole 02 arranged in multiple directions can be more firmly adsorbed based on multi-point positioning, and the stability of chip mounting is improved.

[0054] It should be noted that, Figure 1 and Figure 3 Only 2 vacuum holes 02 are arranged in the second direction D2 and 2 vacuum holes 02 are arranged in the third direction D3 for example, which does not represent the number of vacuum holes 02 in the actual process. The actual shape and size of the carrier plate can be designed specifically, and the present disclosure does not make specific limitations.

[0055] Figure 4 The relative position relationship between the first through hole and the second through hole provided in the embodiment of the present disclosure is shown. Please refer to Figures 1 to 4In an optional embodiment provided in the present disclosure, the positioning device 00 comprises a positioning block 03 fixed with the first carrier plate 10 through fasteners 04. The positioning block 03 is detachably connected with the first carrier plate 10. When the positioning block 03 is fixed on the first carrier plate 10, it can limit the second carrier plate 20 in the horizontal direction. When the positioning block 03 is detached from the first carrier plate 10, it can serve as an entrance for placing the second carrier plate 20, and the second carrier plate 20 can be pushed horizontally into the area defined by the positioning pins 01. It should be noted that the range defined by the positioning pins 01 can be adjusted according to the outer contour of the second carrier plate 20, and the drawings in the present disclosure are only schematic and do not represent the actual position of the positioning pins 01.

[0056] The first carrier plate 10 comprises at least one first through hole 11, and the positioning block 03 comprises at least one second through hole 12. The projections of the first through hole 11 and the second through hole 12 in the first direction D1 overlap. The first direction D1 is perpendicular to the plane in which the first carrier plate 10 is located.

[0057] The positioning block 03 is fixed on the first carrier plate 10 through the fasteners 04, and the fasteners 04 are located in the first through hole 11 and the second through hole 12. The positioning block 03 is located on one side of the second carrier plate 20 along the second direction D2, or the positioning block 03 is located on one side of the second carrier plate 20 along the third direction D3. The second direction D2 is parallel to the plane in which the first carrier plate 10 is located, the third direction D3 is parallel to the plane in which the first carrier plate 10 is located, and the second direction D2 intersects with the third direction D3.

[0058] Specifically, the fasteners 04 can be bolts and nuts and other accessories that can function as fixing and detachable. When it is necessary to fix the second carrier plate 20 on the first carrier plate 10, the positioning block 03 is first removed from the first carrier plate 10, and then the second carrier plate 20 is pushed horizontally into the area defined by the positioning pins 01 from the position where the positioning block 03 is removed. The first through hole 11 on the first carrier plate 10 is aligned with the second through hole 12 on the positioning block 03 in a direction perpendicular to the plane in which the first carrier plate 10 is located, and the fasteners 04 are inserted through the first through hole 11 and the second through hole 12 in the first direction D1 and fixed.

[0059] The positioning device 00 only includes one positioning block 03. Optionally, when the second carrier plate 20 is fixed on the first carrier plate 10, the positioning block 03 is located on one side of the second carrier plate 20 in the second direction D2. Optionally, when the second carrier plate 20 is fixed on the first carrier plate 10, the positioning block 03 is located on one side of the second carrier plate 20 in the third direction D3. The present disclosure does not specifically limit the directions of the second direction D2 and the third direction D3. It is only required to be clear that the positioning block 03 is located on one side of the second carrier plate 20 in the direction parallel to the plane on which the first carrier plate 10 is located. In this way, when the positioning block 03 is removed, an opening is formed, allowing the second carrier plate 20 to be pushed flat into the area formed by the positioning needle 01. When the positioning block 03 is fixed by the fastener 04, the movement range of the second carrier plate 20 can be further reduced, and the accuracy of the carrier switching can be improved.

[0060] The present disclosure provides a chip mounter including the multifunctional conversion jig 100 as described above. The other parts of the chip mounter are the same as those of the prior art. The carrier plate conversion steps of the chip mounter are as follows:

[0061] When the first carrier plate 10 is used as a carrier for chip mounting, the positioning block 03 can be removed from the first carrier plate 10, and chip mounting can be directly performed without the need to replace the carrier, reducing the displacement of the carrier and improving the mounting accuracy.

[0062] When the second carrier plate 20 is used as a carrier for chip mounting, the positioning needle 01 can be fixed on the first carrier plate 10, the positioning block 03 can be removed from the first carrier plate 10, the second carrier plate 20 can be pushed flat into the area formed by the positioning needle 01 from the position where the positioning block 03 is removed, and the positioning block 03 can be fixed on the first carrier plate 10. The second carrier plate 20 can be positioned in the second direction D2 and the third direction D3. Then the chip mounter performs vacuum pumping, and the second carrier plate 20 is fixed on the first carrier plate 10 in the first direction D1 through the vacuum hole 02. In this way, the second carrier plate 20 can be accurately positioned in the first direction D1, the second direction D2 and the third direction D3. Then chip mounting is performed without the need for manual positioning of the second carrier plate 20, improving the flexibility and accuracy of carrier switching and improving the efficiency of the production line.

[0063] In summary, the multi-functional conversion jig and chip mounting machine table provided by the present disclosure comprises a first carrier plate and a second carrier plate. The first carrier plate comprises a positioning device, and the second carrier plate is fixed on one side of the first carrier plate along a first direction through the positioning device. The first direction is perpendicular to the plane where the first carrier plate is located. By setting the multi-functional conversion jig with the positioning device, flexible switching of different sizes and types of carriers in the same machine table can be realized, and the production flexibility and machine flexibility can be improved. Compared with manually placing different carriers on the machine table, there is a position deviation, or through the low efficiency of the tape fixing and the need for multiple people to work simultaneously. The switching accuracy can be improved, the switching time can be shortened, and the production line efficiency can be improved. Through the multi-point positioning function of the plurality of positioning pins, the positioning adsorption function of the vacuum hole, and the limiting function of the positioning block, the precise positioning of the second carrier plate in the first direction, the second direction and the third direction can be realized, the offset probability of the second carrier plate can be reduced, the flexibility and accuracy of the carrier switching can be improved, the chip mounting accuracy can be improved, and the production line efficiency can be improved.

[0064] The above description is merely a specific implementation of the present disclosure, enabling those skilled in the art to understand or implement the present disclosure. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to these embodiments described herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A multifunctional conversion tool, characterized in that: Comprising: a first carrier plate and a second carrier plate, the first carrier plate comprising a positioning device, the second carrier plate being fixed to one side of the first carrier plate along a first direction by the positioning device, the first carrier plate and the second carrier plate being different in shape; the first direction being perpendicular to the plane in which the first carrier plate lies.

2. The multifunctional conversion jig according to claim 1, wherein the positioning device comprising at least 3 positioning pins, the positioning pins being at least partially protruding from the surface of the first carrier plate.

3. The multifunctional conversion fixture of claim 2, wherein the positioning pins being located at the outer periphery of the second carrier plate; at least part of the positioning pins being located along a second direction, at least part of the positioning pins being located along a third direction, the second direction being parallel to the plane in which the first carrier plate lies, the third direction being parallel to the plane in which the first carrier plate lies, and the second direction intersecting the third direction.

4. The multifunctional conversion jig according to claim 2, wherein the positioning pins comprising first positioning pins and second positioning pins, at least two of the first positioning pins being arranged on both sides of the second carrier plate along the diameter direction of the second carrier plate; at least two of the second positioning pins being arranged on one side of the second carrier plate along the same side of the two first positioning pins.

5. The multifunctional conversion fixture of claim 1, wherein, the positioning device comprising at least 2 vacuum holes, the projection of the second carrier plate along the first direction covering the vacuum holes.

6. The multifunctional conversion jig of claim 5, wherein: the first carrier plate comprises at least two pairs of vacuum holes, the first carrier plate comprising a first diameter and a second diameter, at least one pair of the vacuum holes being arranged on both sides of the center of the first carrier plate along the direction of the first diameter, at least one pair of the vacuum holes being arranged on both sides of the center of the first carrier plate along the direction of the second diameter; the extension direction of the first diameter and the extension direction of the second diameter are perpendicular.

7. The multifunctional conversion fixture of claim 1, wherein the positioning device comprises a positioning block, the positioning block being fixed to the first carrier plate by fasteners, the first carrier plate comprises at least one first through hole, the positioning block comprises at least one second through hole, the projections of the first through hole and the second through hole along the first direction overlapping; the positioning block is fixed to the first carrier plate by fasteners, the fasteners being located in the first through hole and the second through hole; the positioning block is located on one side of the second carrier plate along a second direction, or the positioning block is located on one side of the second carrier plate along a third direction; the second direction is parallel to the plane in which the first carrier plate lies, the third direction is parallel to the plane in which the first carrier plate lies, and the second direction intersects the third direction.

8. The multifunctional conversion fixture of claim 7, wherein, the positioning block and the first carrier plate are detachably connected.

9. A chip mounter comprising: comprising the multifunctional conversion jig of any one of claims 1-8.

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