KR100781751B1 - Supply device and supply method of anisotropic conductive film - Google Patents

Abstract

The present invention relates to an anisotropic conductive film supply device. In the present invention, a pair of cassettes 32 are rotatably installed in the main chassis. The anisotropic conductive film 30 necessary for the thermocompression bonding process is wound around the cassette 32. In addition, an ultrasonic welder 40 is installed in the main chassis, and the ultrasonic welder 40 has an end portion of the supplied anisotropic conductive film 30 and a front portion of the newly supplied anisotropic conductive film 30 by ultrasonic waves. Connect through welding. The tip of the ultrasonic welder 40 is provided with a welding acid 44 for rapid melting. According to the present invention as described above, the supply of the anisotropic conductive film is continuously made without interruption, and the supply is automatically made by the machine, there is an advantage to improve the productivity and workability of the product.

Description

Supply device for anisotropic conductive film and supply method

1 is a front view of a supply apparatus of the anisotropic conductive film according to the prior art.

Figure 2 is a right side view of the supply device for anisotropic conductive film according to the prior art.

Figure 3a to 3c is a schematic view showing the operation of the supply apparatus of the anisotropic conductive film according to the present invention.

Figure 4 is a schematic view showing that the anisotropic conductive film is welded by the ultrasonic welder constituting an embodiment of the present invention.

Figure 5 is a flow chart showing a preferred embodiment of the supply method of the anisotropic conductive film according to the present invention.

Explanation of symbols on the main parts of the drawings

30: anisotropic conductive film 32: cassette

34: drive motor 36: feed roller

37: sensor 38: vacuum unit

40: ultrasonic welding machine 42: horn

44: welding

The present invention relates to an anisotropic conductive film, and more particularly to an apparatus for supplying an anisotropic conductive film for automatically improving the workability by automatically replacing the anisotropic conductive film mainly used in semiconductor mounting.

In general, a plurality of driver ICs for driving TFT (Thin Film Transistor) patterns are generally mounted in a liquid crystal display device, and the driver IC has overall performance of the device among the components of the liquid crystal display device. It is a very important part that determines.

The driver IC is mounted on the LCD device largely, and the chip on glass (COG) mounting method, in which the driver IC is mounted directly on the gate area and the data area of the LCD panel without any structure, and the TCP with the driver IC ( Tape Carrier Package (TAP) is divided into TAB (Tape Automated Bonding) mounting method, which indirectly mounts the driver IC in the LCD panel gate area and data area.

Here, when the tap mounting method is applied by mounting the driver IC on the LCD, the TCP mounted with the driver IC is applied to the LCD panel and the printed circuit board through an anisotropic conductive film (ACF). By being securely connected, the driver IC can quickly perform the functions assigned to it.

In addition, anisotropic conductive films are adhesive and current-carrying materials used when bonding IC to LCD panel glass or COF, or TCP to glass, and are typical materials used in semiconductor mounting.

1 is a front view of a supply apparatus for anisotropic conductive films according to the prior art, and FIG. 2 is a right side view of a supply apparatus for anisotropic conductive films according to the prior art.

As shown in these figures, the main chassis 1 is formed in the skeleton of the supply apparatus of the anisotropic conductive film. A drive motor 3 (see FIG. 2) is installed on the bottom of the main chassis 1 to transfer power to the cassette 7 to be described below. The drive motor 3 is provided with a rotary shaft 5 (see FIG. 2), and a cassette 7 is rotatably installed on the rotary shaft 5. The cassette is a portion in which the anisotropic conductive film 9 used in the thermal compression process of the LCD or PDP module is wound.

A pair of guide rails 11 are installed in the main chassis 1 in parallel. The guides 12 are installed on the guide rails 11 so as to be movable. One of the guides 12 is provided with a guide roller 13. The anisotropic conductive film 9 is wound around the guide roller 13, and the guide roller 13 supplies the anisotropic conductive film 9 while moving up and down according to the movement of the guide 12.

The moving weight 15 is installed on the other one of the guides 12. The guide 12 is connected to each other by a wire (not shown) so that when the moving weight 15 moves downward in the process of supplying the anisotropic conductive film 9, the guide roller 13 is linked upward Will be moved to. That is, the guide roller 13 and the moving weight 15 are connected and moved like a pulley.

On the other hand, the cassette 7 is installed to be detachable from the rotary shaft 5 by the knob 17. A supply roller 19 for guiding the anisotropic conductive film 9 toward the thermocompression tool is rotatably installed under the main chassis 1.

In the prior art having such a configuration, the operator mounts the cassette 7 on which the anisotropic conductive film 9 is wound on the rotary shaft 5, and tightens the knob 17 to fix the cassette 7. In this state, the tip of the anisotropic conductive film 9 is tightly connected to the feed roller 19 via the guide roller 13. Initially, the guide roller 13 is located at the upper end of the guide rail 11 by the tension according to the weight of the moving weight 15, the moving weight 15 is located at the lower end of the guide rail 11 Done.

When the driving motor 3 is driven, the anisotropic conductive film 9 wound while the cassette 7 is rotated through the rotation shaft 5 is released. At the same time, the feed roller 19 to which the anisotropic conductive film 9 is connected rotates to supply the anisotropic conductive film 9 to the thermocompression tool. At this time, the guide 12 in which the guide roller 13 is installed is moved downward by the force that the feed roller 19 pulls the anisotropic conductive film (9). In addition, the guide 12 provided with the moving weight 15 is moved upward by the tension of the wire.

When the guide 12 in which the guide roller 13 is installed is moved to the lower end of the guide frame 11, the supply of the supply roller 19 is stopped and the guide 12 is attached to the weight of the moving weight 15. By the movement to the top of the guide frame 11 again. At this time, the guide 12 having the moving weight 15 is installed will be moved to the lower end of the guide frame 11 by the tension of the wire. As the above-described operation is repeated, the supply of the anisotropic conductive film 9 is continuously performed.

However, the prior art as described above has the following problems.

First, the cassette 7 is to be replaced by the operator's hand. That is, when the supply of the anisotropic conductive film 9 wound on one cassette 7 is finished, the operator loosens the knob 17 and takes out the cassette 7. Then, the cassette 7 wound with the new anisotropic conductive film 9 is inserted into the rotary shaft 5 again, and the knob 17 is tightened to fix the cassette 7.

It will take a long time to make such a replacement, and the manual operation of the cassette 7 in the operation requiring sophistication and speed, such as an LCD thermocompression process, is a factor that lowers the productivity of the product. do.

In addition, there is a problem that the workability is inferior because the manufacturing process is made only when the operator is always waiting to replace the cassette (7).

Accordingly, an object of the present invention is to solve the problems of the prior art as described above, and to provide an apparatus for supplying an anisotropic conductive film which can continuously supply an anisotropic conductive film.

Another object of the present invention is to provide an apparatus for supplying an anisotropic conductive film in which the supply of the anisotropic conductive film proceeds automatically.

According to a feature of the present invention for achieving the above object, the present invention comprises a pair of cassettes rotatably installed in the main chassis, the anisotropic conductive film is wound; A vacuum unit for maintaining a fixed state by adsorbing an end portion of the supplied anisotropic conductive film and a front portion of the newly supplied anisotropic conductive film; And an ultrasonic welding machine for welding the anisotropic conductive film with vibration energy generated by ultrasonic waves.

The rotary shaft of the cassette is selectively connected to the rotary shaft of the drive motor which is installed in the main chassis to provide power.

The main chassis is provided with a detection sensor for detecting that the supply of the anisotropic conductive film wound on the cassette is finished.

At the tip of the ultrasonic welding machine is a welding acid for rapid melting.

According to another feature of the invention, the present invention comprises the steps of supplying an anisotropic conductive film wound on a cassette; Sensing that the supply of the anisotropic conductive film is finished; And it comprises a step of ultrasonic welding the end of the anisotropic conductive film and the front portion of the newly supplied anisotropic conductive film.

When detecting that the supply of the anisotropic conductive film is finished, the step of cutting the end of the anisotropic conductive film is configured to further comprise.

When the end portion of the anisotropic conductive film is cut, the method further comprises the step of replacing the cassette in which the supplied anisotropic conductive film is wound with a newly supplied anisotropic conductive film wound.

Ultrasonically welded portions of the anisotropic conductive film is configured to further include a step of adsorbed by the vacuum unit to maintain a fixed state.

According to the present invention as described above, the supply of the anisotropic conductive film is continuously made without interruption, and the supply is automatically made by the machine, there is an advantage to improve the productivity and workability of the product.

Hereinafter, with reference to the accompanying drawings a preferred embodiment of the supply apparatus of the anisotropic conductive film according to the present invention will be described in detail.

3a to 3c is a schematic view showing the operation of the supply apparatus of the anisotropic conductive film according to the present invention, Figure 4 is a schematic view that the anisotropic conductive film is welded by the ultrasonic welding machine constituting an embodiment of the present invention. The configuration diagram shown.

As shown in these figures, a cassette 32 in which an anisotropic conductive film 30 is wound is installed in a main chassis (not shown) forming a skeleton of a supply device of the anisotropic conductive film.

The two cassettes 32 are installed in parallel so that the anisotropic conductive film 30 is wound around each other, and the cassette 32 alternately supplies the anisotropic conductive film 30 to the thermocompression tool. Specifically, the cassette 32 is installed to be moved by a cylinder (not shown) installed in the main chassis.

The main chassis is provided with a drive motor 34 for providing the power necessary for the rotation of the cassette (32). The rotating shaft of the drive motor 34 is connected to the central axis of the cassette 32 to rotate the cassette 32, and is supplied while the anisotropic conductive film 30 is released by the rotation of the cassette 32. Will be. For example, when the driving motor 34 finishes supplying the anisotropic conductive film 30 by rotating one of the cassettes 32, the cassette 32 in which the anisotropic conductive film 30 newly supplied by the cylinder is wound. ) Is moved and the cassette 32 is connected to the rotating shaft of the drive motor 34 to be rotated together.

The main chassis is rotatably provided with a feed roller 36 for guiding the anisotropic conductive film 30 supplied from the cassette 32 to the thermocompression bonding tool. In the adjacent portion of the feed roller 36, a sensor 37 for detecting that the supply of the anisotropic conductive film 30 wound on any one cassette 32 is completed. For example, if the length of the anisotropic conductive film 30 wound around each cassette 32 is 50m, it is to detect this when the anisotropic conductive film 30 is supplied about 49m.

On the other hand, the main chassis is provided with a vacuum unit 38 for cutting and adsorption of the anisotropic conductive film 30. The vacuum unit 38 is equipped with a cutter (not shown) that is operated by pneumatic pressure to cut the end of the supplied anisotropic conductive film 30. In addition, the vacuum unit 38 adsorbs the supplied anisotropic conductive film 30 and the newly supplied anisotropic conductive film 30 in a vacuum state and fixes them at a predetermined position.

An ultrasonic welding machine 40 for welding the anisotropic conductive film 30 is installed in the main chassis. The front end of the ultrasonic welder 40 is provided with a horn 42 for the ultrasonic wave is emitted. In addition, the horn 42 is provided with a welding acid 44 for rapid melting of the anisotropic conductive film 32.

The welding peak 44 is generally formed by 1/10 of the height of the product width and the width of twice the welding peak height. If the welding acid 44 is too small or too large, a strong welding strength cannot be obtained, and it should be formed based on the above considerations. Therefore, when the welding acid 44 is approximately 2.0 mm in width of the anisotropic conductive film 30, it is preferable that the height is 0.2 mm and the width is 0.4 mm.

When designing the ultrasonic welder 40, the following matters should be considered.

First, in the case of the pressing force, the higher the pressure, the more the flow of the melt increases and the weld strength is brought into close contact with each other to increase the welding strength. In the case of welding time, when the molten layer is sufficiently formed on the welding surface, the welding strength is improved, so sufficient welding time is required. However, if the welding time is too long, the flow of the molten layer is excessive. In addition, the adhesion quality can be improved by bonding together using an adhesive or a solvent.

Hereinafter, the operation of the supplying device of the anisotropic conductive film according to the present invention having the configuration as described above will be described in detail.

First, it is necessary to set the cassette 32 prior to supplying the anisotropic conductive film 30. The anisotropic conductive film 30 wound on the cassette 32 to be supplied in advance is unwound by a predetermined length and hanged on the feed roller 36. Then, the anisotropic conductive film 30 wound on the cassette 32 to be supplied later is released to a predetermined length so as to be positioned on the vacuum unit 38.

In this state, when the operator operates the drive motor 34, the cassette 32 to be supplied is rotated and at the same time, the feed roller 36 is also rotated to supply the anisotropic conductive film 30 to the thermocompression bonding tool. It is made (S100). The anisotropic conductive film 30 supplied to the thermocompression tool is used as a current-carrying material for the liquid crystal display through a tab bonding process.

When the supply time of the anisotropic conductive film 30 supplied as described above is near, that is, when all of the anisotropic conductive film 30 wound on the pre-supplied cassette 32 is supplied, this is detected by the sensor 36. Sensing and sending an electrical signal to the drive motor 34 to stop the rotation of the cassette (32) (S110). For example, information about the speed at which the anisotropic conductive film 30 is supplied to the detection sensor 36 is input, and anisotropic conductive film is measured by measuring the time for which the anisotropic conductive film 30 is supplied based on the information. The 30 is measured by measuring the length supplied.

Then, the vacuum unit 38 first cuts the end portion of the supplied anisotropic conductive film 30 using a pneumatic cutter provided therein (S120). Then, the air around the anisotropic conductive film 30 is adsorbed instantaneously to fix the cut end of the anisotropic conductive film 30 (S130).

Then, the drive shaft 34 and the rotary shaft of the cassette 32 pre-supplied are released. Then, the drive motor 34 is connected to the rotary shaft of the cassette 32 to be supplied later. In this state, the cassette 32 supplied afterwards is moved to the position where the cassette 32 pre-supplied by the cylinder was. As described above, the anisotropic conductive film 30 wound on the cassette 32 to be supplied later is slightly loosened and positioned on the vacuum unit 38. Through the above-described operation, the cassette 32 is replaced (S140).

The driving motor 34 is operated to allow the newly supplied anisotropic conductive film 30 to be placed on the supplied anisotropic conductive film 30 as shown in FIG. 3B. In addition, the vacuum unit 38 is also adsorbed to the front portion of the newly supplied anisotropic conductive film 30 is fixed on the supplied anisotropic conductive film 30 (S150).

In this state, the ultrasonic welder 40 ultrasonically welds the anisotropic conductive film 30 (S160). Ultrasonic welding is made between the end of the supplied anisotropic conductive film 30 and the front of the newly supplied anisotropic conductive film 30.

When the welding of the ultrasonic welder 40 is started, the ultrasonic welder 40 is the resonance of the ultrasonic wave is converted into the left and right vibration energy to vibrate quickly in the direction of the arrow. Then, the welding acid 44 melts while friction heat is generated on the weld surface. Therefore, friction heat is generated instantaneously by powerful vibration through the horn 42, and a thin molten layer is formed. Then, the bonding surface between the anisotropic conductive film 30 is dissolved and bonded to form a molecular bond, allowing a brief cooling time.

The optimum condition at the time of welding by the ultrasonic welder 50 is that the welding is performed for 0.8 seconds and the cooling after the welding is performed for 1.2 seconds.

As such, when welding is performed between the anisotropic conductive films 30, the cassette 32 is rotated again to supply the anisotropic conductive film 30 to the thermocompression process (FIG. 3C). As the above-described process is repeated, the anisotropic conductive film 30 may be continuously supplied. In addition, the operator simply winds and installs the anisotropic conductive film 30 in the cassette 32 which is not supplied, and the anisotropic conductive film 30 is automatically supplied to the thermocompression bonding process.

The rights of the present invention are not limited to the embodiments described above, but are defined by the claims, and various changes and modifications can be made by those skilled in the art within the scope of the claims. It is self-evident.

In the supplying device of the anisotropic conductive film according to the present invention as described in detail above, the following effects can be expected.

First, although the operator directly replaces the cassette in which the anisotropic conductive film is wound in the related art, in the present invention, the cassette is automatically replaced by a separate device. Therefore, the supply of the anisotropic conductive film is made without interruption, there is an advantage that the productivity of the product is improved.

And, unlike the related art, since the operator does not have to wait for the cassette to be replaced one by one, there is an advantage in that workability is improved.

Claims (8)

A pair of cassettes rotatably installed in the main chassis and having an anisotropic conductive film wound thereon; A vacuum unit for maintaining a fixed state by adsorbing an end portion of the supplied anisotropic conductive film and a front portion of the newly supplied anisotropic conductive film; And Apparatus for supplying an anisotropic conductive film, characterized in that it comprises an ultrasonic welding machine for welding the anisotropic conductive film by the vibration energy generated by the ultrasonic wave. The method of claim 1, The rotary shaft of the cassette is an apparatus for supplying anisotropic conductive film, characterized in that it is selectively connected to the rotary shaft of the drive motor to provide power to the main chassis. The method of claim 2, The main chassis is a supply device for anisotropic conductive film, characterized in that the sensor is installed to detect the end of the supply of the anisotropic conductive film wound on the cassette. The method according to any one of claims 1 to 3, Supply device for anisotropic conductive film, characterized in that the front end of the ultrasonic welding machine is provided with a welding acid for rapid melting. Supplying an anisotropic conductive film wound on a cassette; Sensing that the supply of the anisotropic conductive film is finished; And Ultrasonic welding the end of the anisotropic conductive film and the front portion of the newly supplied anisotropic conductive film supply method of the anisotropic conductive film comprising a. The method of claim 5, When the supply of the anisotropic conductive film is sensed that the end of the supply method of the anisotropic conductive film, characterized in that it further comprises the step of cutting the end of the anisotropic conductive film. The method of claim 6, When the end of the anisotropic conductive film is cut, the supply of the anisotropic conductive film, characterized in that it further comprises the step of replacing the cassette of the supplied anisotropic conductive film wound with the newly supplied anisotropic conductive film wound cassette Way. The method according to any one of claims 5 to 7, Ultrasonically welded portion of the anisotropic conductive film is adsorbed by the vacuum unit, the method of supplying an anisotropic conductive film, characterized in that it further comprises a step of maintaining a fixed state.

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