Transfer printing equipment and method

Abstract

The invention discloses transfer printing equipment and a transfer printing method comprising the transfer printing equipment, the transfer printing equipment comprises a conveying line and a transfer printing shaft, the conveying line is used for conveying a plurality of substrates with conductive balls towards the direction of the transfer printing shaft, a plurality of hole grooves are formed in the substrates in a matrix mode, each hole groove is provided with one conductive ball, and the conductive balls are arranged in the hole grooves. The ACF film bypasses the bottom of the transfer printing shaft from one side of the transfer printing shaft from top to bottom and extends out of the other side of the transfer printing shaft from bottom to top, and when the substrate passes through the lower portion of the transfer printing shaft, the conductive balls on the substrate are pasted on the ACF film. The transfer printing equipment can arrange the conductive balls on the ACF film in a matrix mode.

Description

Technical Field

[0001] The present invention particularly relates to a transfer device and a transfer method comprising the transfer device. Background Art

[0002] ACF film (Anisotropic Conductive Film) is widely used in electronic products. When used, it is necessary to adhere conductive balls to be used in the next process.

[0003] In the prior art, the ACF film is generally coated by a coater to adhere the conductive balls to the ACF film. However, the conductive balls coated by the coater are usually irregular (cannot be arranged in a regular shape). Such products cannot be used in high-end equipment and waste the conductive balls. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a transfer device and a transfer method including the transfer device in view of the above-mentioned deficiencies in the prior art. The transfer device can arrange the conductive balls in a matrix on the ACF film.

[0005] In order to solve the above problems, the present invention adopts the following technical solutions:

[0006] A transfer device comprises a conveying line and a transfer shaft, wherein the conveying line is used to convey a plurality of substrates with conductive balls toward the direction of the transfer shaft, wherein a plurality of holes are arranged in a matrix on the substrate, each hole having a conductive ball, an ACF film passes from top to bottom from one side of the transfer shaft around the bottom of the transfer shaft, and extends from bottom to top from the other side of the transfer shaft, and when the substrate passes under the transfer shaft, the conductive balls on the substrate adhere to the ACF film.

[0007] Preferably, the transfer device also includes a control component and a lifting component, the control component includes a controller and a rangefinder, the rangefinder is arranged at the transfer shaft, and is used to measure the distance between the transfer shaft and the substrate, the rangefinder is electrically connected to the controller, and is used to send the measured distance between the transfer shaft and the substrate to the controller, the controller stores the distance range standard of the transfer shaft and the substrate, the controller is also electrically connected to the lifting component, when the distance between the transfer shaft and the substrate received by the controller is greater than the upper limit of the distance range standard, the lifting component is controlled to move downward to within the distance range standard; when the distance between the transfer shaft and the substrate received by the controller is less than the lower limit of the distance range standard, the lifting component is controlled to move upward to within the distance range standard.

[0008] Preferably, the distance between the transfer axis and the substrate is in the range of 0.9-1.1 μm.

[0009] Preferably, the transfer device also includes a clamping assembly, which is arranged above the conveyor line. The clamping assembly includes a pressure plate shaft and a telescopic electric cylinder. The pressure plate shaft is fixed on the telescopic electric cylinder. The telescopic electric cylinder can drive the pressure plate shaft to move in a vertical direction. The telescopic electric cylinder drives the pressure plate shaft to move downward close to the conveyor line, thereby contacting the substrate to ensure stability during substrate transportation.

[0010] Preferably, the transfer device also includes a unwinding shaft and a rewinding shaft, which are respectively located on both sides of the transfer shaft and both are located above the transfer shaft. The ACF film is wound on the unwinding shaft and is rewinded at the rewinding shaft after passing through the transfer shaft. The ACF film forms a V-shape under the action of the unwinding shaft, the rewinding shaft and the transfer shaft.

[0011] Preferably, the transfer device also includes a pressure roller and a black film shaft, the pressure roller is arranged between the transfer shaft and the winding shaft, the black film shaft is arranged on one side of the pressure roller, and a black film is wound around the black film shaft, the ACF film and black film that have completed the transfer both pass through the pressure roller, the pressure roller presses the black film on the side of the ACF film where the conductive ball is adhered, and the ACF film and black film pressed into one are wound at the winding shaft.

[0012] Preferably, the transfer device further comprises a workbench and a mounting plate, the conveyor line is mounted on the workbench, and the mounting plate is arranged on the workbench along a vertical direction.

[0013] Preferably, the distance between two adjacent substrates does not exceed 1 μm.

[0014] Preferably, the conveyor line comprises a plurality of rollers arranged in parallel.

[0015] The present invention also provides a transfer method, using the above transfer device, the method

[0016] The method is as follows:

[0017] Place multiple substrates on a conveyor line and keep the distance between two adjacent substrates no more than 1 μm;

[0018] Operate the conveyor line to move the substrate under the transfer shaft, ensuring that the distance between the substrate and the transfer shaft is between 0.9-1.1 μm;

[0019] Pass the ACF film around the transfer axis;

[0020] The conveying line and the transfer shaft are started at the same time, so that the conductive balls on the substrate are bonded to the ACF film.

[0021] The transfer device in the present invention can adhere the conductive balls arranged in a matrix on the substrate to the ACF film in a regular shape, so that the conductive balls are regularly arranged (matrix shape) on the ACF film to meet the needs of high-end equipment and reduce the waste of conductive balls. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural diagram of a transfer device in Embodiment 1 of the present invention;

[0023] In the figure: 100- conveyor line, 110- ACF film, 120- black film, 200- transfer shaft, 300- substrate, 400- pressure plate shaft, 500- unwinding shaft, 600- rewinding shaft, 700- black film shaft, 800- workbench, 810- mounting plate, 900- pressing roller. DETAILED DESCRIPTION

[0024] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of the present invention.

[0025] In the description of the present invention, it should be noted that the term "upper" and the like to indicate orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0026] In the description of the present invention, the terms “first” and “second” are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connect", "set", "install", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0028] The present invention provides a transfer device, comprising a conveying line and a transfer shaft, wherein the conveying line is used to convey a plurality of substrates with conductive balls toward the direction of the transfer shaft, wherein a plurality of holes are arranged in a matrix on the substrate, each hole having a conductive ball, an ACF film passes around the bottom of the transfer shaft from top to bottom from one side of the transfer shaft, and extends from bottom to top from the other side of the transfer shaft, and when the substrate passes under the transfer shaft, the conductive balls on the substrate are adhered to the ACF film.

[0029] The present invention also provides a transfer method, using the above transfer device, the method is as follows:

[0030] Place multiple substrates on a conveyor line and keep the distance between two adjacent substrates no more than 1 μm;

[0031] Operate the conveyor line to move the substrate under the transfer shaft, ensuring that the distance between the substrate and the transfer shaft is between 0.9-1.1 μm;

[0032] Pass the ACF film around the transfer axis;

[0033] The conveying line and the transfer shaft are started at the same time, so that the conductive balls on the substrate are bonded to the ACF film.

[0034] Example 1

[0035] like Figure 1 As shown, this embodiment discloses a transfer device, including a conveying line 100 and a transfer shaft 200. The conveying line 100 is used to convey a plurality of substrates 300 with conductive balls toward the transfer shaft 200. Specifically, the transfer shaft 200 is located above the conveying line 100.

[0036] There are multiple holes arranged in a matrix on the substrate 300, each hole has a diameter range of 2.5-5μm (the number of holes on a substrate is more than one billion), each hole has only one conductive ball, the ACF film 110 goes around the bottom of the transfer shaft 200 from one side of the transfer shaft 200 from top to bottom, and extends from the other side of the transfer shaft 200 from bottom to top. When the substrate 300 passes under the transfer shaft 200, the conductive balls on the substrate 300 are attached to the ACF film 110. The conveyor line 100 drives the substrate 300 to move, and the transfer shaft 200 drives the ACF film 110 to move, so that the conductive balls are continuously attached to the ACF film 110.

[0037] In this embodiment, the transfer device further includes a control component and a lifting component. The control component includes a controller and a rangefinder, which is arranged near the transfer shaft 200 and is used to measure the distance between the transfer shaft 200 and the substrate 300. The rangefinder is electrically connected to the controller and is used to send the measured distance between the transfer shaft 200 and the substrate 300 to the controller. The controller stores the distance range standard of the transfer shaft 200 and the substrate 300. The controller is also electrically connected to the lifting component. When the distance between the transfer shaft 200 and the substrate 300 received by the controller is greater than the upper limit of the distance range standard, the lifting component is controlled to move downward to the distance range standard; when the distance between the transfer shaft 200 and the substrate 300 received by the controller is less than the lower limit of the distance range standard, the lifting component is controlled to move upward to the distance range standard.

[0038] Specifically, the distance between the transfer shaft 200 and the substrate 300 is in the range of 0.9-1.1 μm, so that the distance between the substrate 300 and the transfer shaft 200 is always controlled at about 1 μm. In addition, the most advanced Keyence position distance meter is used for distance detection. In order to ensure accuracy, the lifting component uses a high-precision servo motor, lead screw and encoder.

[0039] like Figure 1 As shown, in this embodiment, the transfer device further includes a clamping assembly, which is arranged above the conveyor line 100. The clamping assembly includes a platen shaft 400 and a telescopic electric cylinder, the platen shaft 400 is fixed on the telescopic electric cylinder, the telescopic electric cylinder can drive the platen shaft 400 to move in a vertical direction, and the telescopic electric cylinder drives the platen shaft 400 to move downward close to the conveyor line 100, so as to contact with the substrate 300, so as to ensure the stability of the substrate 300 during the conveying process.

[0040] Specifically, a plurality of clamping assemblies are provided, and the plurality of clamping assemblies are arranged at intervals along the moving direction of the conveyor line 100 .

[0041] The transfer device further includes an unwinding shaft 500 and a rewinding shaft 600, which are respectively located on both sides of the transfer shaft 200 and are both located above the transfer shaft 200. The ACF film 110 is wound on the unwinding shaft 500, and after passing through the transfer shaft 200, it is rewound at the rewinding shaft 600. Moreover, the ACF film 110 forms a V-shape under the action of the unwinding shaft 500, the rewinding shaft 600 and the transfer shaft 200. Such a setting can better control the tension of the ACF film and prevent the ACF film 110 from wrinkling.

[0042] The transfer device further includes a pressing roller 900 and a black film shaft 700. The pressing roller 900 is arranged between the transfer shaft 200 and the winding shaft 600. The black film shaft 700 is arranged on one side of the pressing roller 900. The black film 120 is wound around the black film shaft 700. The ACF film 110 and the black film 120 that have completed the transfer pass through the pressing roller 900. The pressing roller 900 presses the black film 120 on the side of the ACF film 110 that is adhered with the conductive ball. The ACF film 110 and the black film 120 that are pressed into one are wound at the winding shaft 600. Specifically, the black film 120 is made of PET material.

[0043] like Figure 1 As shown, the transfer device further includes a workbench 800 and a mounting plate 810 , the conveyor line 100 is mounted on the workbench 800 , and the mounting plate 810 is arranged on the workbench 800 in a vertical direction.

[0044] Specifically, the transfer device also includes a driving assembly, which is arranged on a side of the mounting plate 810 away from the conveying line 100, and includes a first driving unit, a second driving unit, a third driving unit, a fourth driving unit, and a fifth driving unit.

[0045] The output shaft of the first driving unit passes through the mounting plate 810 and is connected to the conveyor line 100 to drive the conveyor line 100 to move; the output shaft of the second driving unit passes through the mounting plate 810 and is connected to the unwinding shaft 500 to drive the unwinding shaft 500 to rotate; the output shaft of the third driving unit passes through the mounting plate 810 and is connected to the reeling shaft 600 to drive the reeling shaft 600 to rotate; the output shaft of the fourth driving unit passes through the mounting plate 810 and is connected to the transfer shaft 200 to drive the transfer shaft 200 to rotate; the output shaft of the fifth driving unit passes through the mounting plate 810 and is connected to the transfer shaft 200 to drive the black film shaft 700 to rotate. In addition, the telescopic electric cylinder is also arranged on the side of the mounting plate 810 away from the conveyor line 100. The unwinding shaft 500, the reeling shaft 600, the black film shaft 700, the transfer shaft 200, and the pressure plate shaft 400 are all arranged on the same side of the mounting plate 810 as the conveyor line 100.

[0046] The first drive unit, the second drive unit, the third drive unit, the fourth drive unit and the fifth drive unit all use servo motors. Moreover, the second drive unit is mounted on the lead screw of the servo motor of the lifting assembly to drive the transfer shaft 200 to move in the vertical direction under the action of the lifting assembly.

[0047] It is worth noting that the spacing between two adjacent substrates 300 on the conveyor line 100 cannot exceed 1 μm. If the gap between the substrates 300 is too large, the conductive balls on the ACF film 110 will also have gaps, thereby affecting the quality of the product.

[0048] In this embodiment, the conveyor line 100 includes a plurality of rollers arranged in parallel.

[0049] The transfer device in this embodiment can adhere the conductive balls arranged in a matrix on the substrate 300 to the ACF film 110 in a regular shape, so that the conductive balls are regularly arranged (matrix shape) on the ACF film 110 to meet the needs of high-end equipment and reduce the waste of conductive balls.

[0050] Example 2

[0051] This embodiment discloses a transfer method, using the transfer device in embodiment 1, the method is as follows:

[0052] Placing a plurality of substrates 300 on the conveying line 100 , and keeping the distance between two adjacent substrates 300 no more than 1 μm;

[0053] The conveyor line 100 is operated to move the substrate 300 to below the transfer shaft 200, and the spacing between the substrate 300 and the transfer shaft 200 is ensured to be between 0.9 μm and 1.1 μm.

[0054] The ACF film 110 is passed around the transfer shaft 200;

[0055] The conveying line 100 and the transfer shaft 200 are simultaneously activated so that the conductive balls on the substrate 300 are bonded to the ACF film 110 .

[0056] like Figure 1 As shown, specifically, first, a plurality of substrates 300 are placed end to end on the conveyor line 100 at the same time, and the distance between two adjacent substrates 300 is kept within 1 μm;

[0057] Then, the distance between the transfer shaft 200 and the substrate 300 is controlled between 0.9-1.1 μm by means of a controller, a distance meter, and a lifting assembly;

[0058] Secondly, the ACF film 110 is pulled out from the unwinding shaft 500, and is passed around the transfer shaft 200 from bottom to top, and is then wound around the winding shaft 600 after passing through the pressing roller 900;

[0059] The black film 120 is then pulled out from the black film shaft 700, passed through the pressing roller 900, and then wound on the winding shaft 600;

[0060] The conveying line 100 and the transfer shaft 200 are simultaneously activated so that the conductive balls on the substrate 300 are bonded to the ACF film 110 .

[0061] The transfer method in this embodiment can effectively adhere the conductive balls arranged in a matrix on the substrate 300 to the ACF film 110 in a regular shape, so that the conductive balls are regularly arranged (matrix shape) on the ACF film 110 to meet the needs of high-end equipment and reduce the waste of conductive balls. In addition, the method has a high degree of automation, which is conducive to improving the efficiency of transfer.

[0062] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A transfer device, characterized in that: It comprises a conveying line (100) and a transfer shaft (200). The conveying line (100) is used to convey a plurality of substrates (300) with conductive balls toward a transfer axis (200), wherein a plurality of holes (300) are arranged in a matrix, and each hole (300) has a conductive ball. The ACF film (110) passes around the bottom of the transfer shaft (200) from top to bottom from one side of the transfer shaft (200), and extends from bottom to top from the other side of the transfer shaft (200). When the substrate (300) passes under the transfer shaft (200), the conductive balls on the substrate (300) adhere to the ACF film (110).

2. The transfer device according to claim 1, characterized in that It also includes a control component and a lifting component. The control component includes a controller and a distance meter. The distance meter is arranged at the transfer shaft (200) and is used to measure the distance between the transfer shaft (200) and the substrate (300). The distance meter is electrically connected to the controller and is used to send the measured distance between the transfer shaft (200) and the substrate (300) to the controller, wherein the controller stores a distance range standard between the transfer shaft (200) and the substrate (300). The controller is also electrically connected to the lifting assembly, and when the distance between the transfer shaft (200) and the substrate (300) received by the controller is greater than the upper limit of the distance range standard, the lifting assembly is controlled to move downward to within the distance range standard; When the distance between the transfer shaft (200) and the substrate (300) received by the controller is less than the lower limit of the distance range standard, the lifting component is controlled to move upward to within the distance range standard.

3. The transfer device according to claim 2, characterized in that The distance between the transfer axis (200) and the substrate (300) is in the range of 0.9-1.1 μm.

4. The transfer device according to claim 3, characterized in that: Also includes a clamping assembly, The clamping assembly is arranged above the conveying line (100), and the clamping assembly includes a pressure plate shaft (400) and a telescopic electric cylinder. The pressure plate shaft (400) is fixed on the telescopic electric cylinder. The telescopic electric cylinder can drive the pressure plate shaft (400) to move in a vertical direction. The telescopic electric cylinder drives the pressure plate shaft (400) to move downward close to the conveying line (100), thereby contacting the substrate (300) to ensure the stability of the substrate (300) during transportation.

5. The transfer device according to claim 4, characterized in that: The invention also comprises an unwinding shaft (500) and a rewinding shaft (600), wherein the unwinding shaft (500) and the rewinding shaft (600) are respectively located on both sides of the transfer shaft (200) and are both located above the transfer shaft (200), and the ACF film (110) is wound on the unwinding shaft (500) and is rewinded on the rewinding shaft (600) after passing through the transfer shaft (200). The ACF film (110) forms a V-shape under the action of the unwinding shaft (500), the winding shaft (600) and the transfer shaft (200).

6. The transfer device according to claim 5, characterized in that The invention also comprises a pressing roller (900) and a black film shaft (700), wherein the pressing roller (900) is arranged between the transfer shaft (200) and the winding shaft (600), the black film shaft (700) is arranged on one side of the pressing roller (900), and a black film (120) is wound around the black film shaft (700). The ACF film (110) and the black film (120) that have completed the transfer pass through the pressing roller (900), and the pressing roller (900) presses the black film (120) against the side of the ACF film (110) where the conductive balls are adhered, and the ACF film (110) and the black film (120) that have been pressed together are rolled up at the winding shaft (600).

7. The transfer device according to claim 6, characterized in that It also includes a workbench (800) and a mounting plate (810), the conveyor line (100) being mounted on the workbench (800), and the mounting plate (810) being arranged on the workbench (800) in a vertical direction.

8. The transfer device according to claim 1, characterized in that The distance between two adjacent substrates (300) does not exceed 1 μm.

9. The transfer device according to any one of claims 1 to 8, characterized in that: The conveyor line (100) comprises a plurality of rollers arranged in parallel.

10. A transfer method, characterized in that: Using the transfer device described in any one of claims 1 to 9, the method is as follows: Placing a plurality of substrates (300) on a conveyor line (100), and maintaining a distance between two adjacent substrates (300) of no more than 1 μm; The conveyor line (100) is operated to move the substrate (300) below the transfer shaft (200), and the spacing between the substrate (300) and the transfer shaft (200) is ensured to be between 0.9 μm and 1.1 μm; The ACF film (110) is wound around the transfer shaft (200); The conveying line (100) and the transfer shaft (200) are started simultaneously, so that the conductive balls on the substrate (300) are bonded to the ACF film (110).

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