JP5382506B2 - ACF pasting apparatus and pasting method - Google Patents

Description

  The present invention relates to an apparatus and method for attaching an anisotropic conductive film to a display panel or the like.

  When an IC component is mounted on a display panel or the like used as a display or a drive is connected, it is performed via an anisotropic conductive film (hereinafter abbreviated as ACF). Patent Documents 1 and 2 disclose techniques related to an ACF attaching apparatus used for attaching an ACF to a display panel or the like. Patent Document 1 describes the ACF sticking device, and Patent Document 2 describes a pressure-sensitive adhesive device and a pressure-sensitive adhesive method. In Patent Document 1, an ACF tape in which ACF is bonded to a mount tape is used, and in Patent Document 2, a tape body in which an adhesive tape and a release tape are bonded together is used. In each of Patent Documents 1 and 2, a chuck such as a fixed chuck or a moving chuck for holding the ACF tape and the tape body from above and below is provided, and the moving chuck holds the ACF tape and the tape body and pulls it out.

  However, neither of Patent Documents 1 and 2 describes a problem that an ACF or an adhesive tape sticks to a chuck claw of a chuck and a solution to the problem.

  Patent Documents 3 and 4 disclose a solution to the problem that the ACF sticks to the chuck claw. Patent Document 3 describes an anisotropic conductive tape, and Patent Document 4 describes an anisotropic conductive tape sticking apparatus and sticking method.

  Patent Document 3 proposes an anisotropic conductive film tape 20 in which a main material, that is, an anisotropic conductive film 21 is bonded to a base tape 22, as shown in FIG. It has been proposed to prevent the ACF from sticking to the chuck claws by making the base tape 22 only so as to be wider than the film 21.

  In Patent Document 4, as shown in FIG. 6, a hole 50 is provided in the chuck claw 32a on the side that contacts the ACF 15 to which the separator 16 is adhered, and gas is blown out from the hole 50 when the chuck is opened, thereby the ACF 15 from the chuck claw 32a. It is proposed to separate.

  The point which is a problem in the technology related to the ACF pasting apparatus will be described in detail.

  1) If the main material (ACF) is attached to the tape sandwiched between the chucks, the ACF sticks to the chuck claws of the moving chuck and the fixed chuck.

  Due to this sticking, a failure in which the ACF entangles with each part of the ACF sticking apparatus is often induced. Even when the apparatus does not cause a failure, an ACF sticking defect to the display panel (misalignment, no ACF, overlap at the end portion, etc.) occurs.

  In addition, in the conventional ACF adhering apparatus, after the ACF tape reel replacement or the ACF adhering apparatus failure treatment, the main material of the leading part of the tape clamped by the chuck is used to prevent the ACF from adhering to the moving chuck and the fixed chuck. There was a problem that (ACF) removal work was necessary and production could not be performed during this removal work.

  For example, an ACF tape formed by bonding ACF to a base tape is wound about 100 m on a reel, and when the display panel is a 15-inch liquid crystal panel, it can be bonded to about 220 sheets. In other words, even if a failure related to the ACF attachment does not occur at all, it is necessary to remove the main material (ACF) of the tape leading portion accompanying the ACF tape reel replacement for every 220 liquid crystal panel productions.

  2) Since the ACF tape is as thin as about 2 mm in width, it is difficult to realize the ACF tape structure disclosed in Patent Document 3.

  Further, in the chuck structure disclosed in Patent Document 4, since a hole is provided in the chuck claw 32a that contacts the ACF 15, the contact area between the chuck claw 32a and the ACF 15 is reduced. As a result, the clamping force (proportional to the product of the friction coefficient, the contact area, and the applied pressure) with respect to the ACF 15 is reduced, and when the ACF 15 is pulled out, there is a problem of slipping when the ACF 15 is pulled out unless the applied pressure is increased. Further, since the width of the ACF that is normally used is as thin as about 2 mm, the gas blowing hole has a small diameter, and there is a possibility that the separator 16 cannot be reliably peeled off.

  Next, the reason for causing the above problem will be described.

  1) In the conventional ACF adhering apparatus, when the ACF tape reel is mounted / replaced, the ACF at the leading end of the tape is removed. In this case, as long as the apparatus is operating normally, the chuck claw rarely touches the ACF, and the problem that the ACF entangles with each part of the apparatus hardly occurs.

  However, there is a risk of slipping when the ACF tape is pulled out, and if the ACF removal is forgotten when the ACF tape reel is replaced, the ACF sticks to the chuck claw.

  In particular, the ACF used for bonding the electric circuit board is more sticky than the ACF for the display panel, and there is a high possibility that the problem of sticking to the chuck will occur. This is due to the following reason. The electric circuit board has a larger difference in the bonding portion than the display panel compared to a display panel made of glass. The electric circuit board is further included in a tape to be attached to protect the terminal of the ACF bonding portion when soldering an electronic component to the electric circuit board, for example, when the thickness of the substrate material is uneven and chemical substances are adhered during the manufacture of the board. Adhesive strength is likely to decrease due to the release material. In order to cope with such a problem, the ACF for an electric circuit board has higher adhesiveness than the ACF for a display panel.

  2) ACF tapes are usually produced by applying and drying ACF to a base tape having a width of several tens of millimeters so that the ACF has a constant thickness, and then cutting it into a desired width using a device called a slitter. Accordingly, the base tape and the ACF are formed with the same width. This is because it is necessary to use a wide tape so that an ACF tape having a desired width can be easily manufactured, to make the film thickness of the ACF uniform.

  Therefore, in order to realize the tape structure of the cited document 3, it is necessary to apply the ACF to the base tape with a width of about 2 mm or to peel off a part of the ACF from the ACF tape cut wider than the ACF. Production becomes extremely difficult.

  3) In the chuck structure of the cited document 4, by providing a hole in the chuck claw, it is necessary to hold at a high pressure in order to compensate for the reduced holding area, and the sticking of the ACF becomes rather strong.

  Furthermore, the diameter of a gas blowing hole for separation that can be provided in a chuck that sandwiches a thin ACF tape having a width of about 2 mm is considered to be about 1.4 mm at the maximum, and it is necessary to blow out a considerably high-pressure gas. When the width of the ACF tape is thinner, only a very small hole is provided, and separation may be difficult.

JP 2000-340616 A (FIG. 5) Japanese Patent Laying-Open No. 2007-27560 (FIG. 6) JP-A-9-259945 JP-A-9-6251

  The present invention intends to provide an ACF adhering apparatus and an adhering method capable of solving the problem caused by the ACF of the ACF tape adhering to the chuck and entangled.

  The present invention relates to an apparatus and a method for attaching an anisotropic conductive film (hereinafter abbreviated as ACF) to a display panel, an electric circuit board or the like as an object to be attached, and in particular, a structure of a chuck for holding an ACF tape. It has the characteristics. More specifically, the chuck for sandwiching the ACF tape is configured so as not to touch the adhesive ACF when sandwiching.

  According to the aspect of the present invention, in the ACF adhering apparatus for adhering the ACF in the ACF tape formed by adhering the base film and the adhesive ACF to a part that requires electrical connection in the target, A fixed chuck for sandwiching the ACF tape at a fixed position, and a moving chuck for sandwiching and pulling out the ACF tape on the upstream side of the fixed chuck. A pair of chuck claws arranged side by side so as to be able to approach and separate from each other in the state along the ACF tape with the ACF on the lower side, and extend in the same direction as the pair of chuck claws, Including a lift pin configured to move up and down between the pair of chuck claws at a certain time and to advance and retreat in the extending direction. , The ACF tape, the pair of the ACF attachment device chuck jaws, characterized in that to be able to nip without contacting the ACF is provided.

  Each of the fixed chuck and the movable chuck raises the lift pin to the upper limit position in a state where the ACF tape is between the pair of chuck claws when the ACF tape is in the separated state and the lift pin at the lower limit position. After that, the pair of chuck claws are brought close to each other and the lift pins are retracted, whereby a part of the portion lifted upward by the lift pins is held between the pair of chuck claws. Each of the fixed chuck and the movable chuck is moved forward by lowering the retracted lift pin to the lower limit position, and releasing the pair of chuck claws that are brought close to each other so as to release the ACF tape. To be.

  It is preferable that at least the surface of the lift pin is subjected to adhesion reduction treatment.

  The ACF adhering apparatus according to the above aspect further includes a backup unit for mounting the object, a reel unit for winding and holding the ACF tape, and an electric object in the object mounted on the backup unit. Affixing the ACF to a site that requires connection, an affixing roller for peeling the base film from the affixed ACF, a pressurizing head that applies pressure and heat treatment to the affixed ACF, and the pressurizing A hollow unit that removes a part of the ACF on the ACF tape upstream of the head.

  According to another aspect of the present invention, in the ACF pasting method for pasting the ACF in the ACF tape formed by laminating the base film and the ACF having adhesiveness to a site that requires electrical connection in the object, A fixed chuck for holding the ACF tape at a predetermined position and a moving chuck for holding and pulling out the ACF tape on the upstream side of the fixed chuck. A pair of chuck claws arranged in parallel so as to be able to approach and separate from each other in a state along the ACF tape with the ACF on the lower side, and extend in the same direction as the pair of chuck claws, A lift pin configured to move up and down between the pair of chuck claws in the separated state and to be movable back and forth in the extending direction. With the structure including, the ACF tape, ACF attachment wherein said pair of chuck jaws, characterized in that to be able to nip without contacting the ACF is provided.

  According to the present invention, since the chuck for holding the ACF tape is configured so as not to touch the ACF when the ACF tape is held, the equipment failure due to the ACF sticking to the chuck and being entangled can be solved.

It is the figure which showed the main structures of the ACF sticking apparatus by the Example of this invention. It is the figure which showed an example of the ACF tape used in this invention. It is a figure for demonstrating the structure and operation | movement of a moving chuck | zipper and a fixed chuck | zipper in the ACF sticking apparatus shown by FIG. It is a figure for demonstrating the structure and operation | movement of an ACF sticking apparatus shown by FIG. It is the figure which showed an example of the anisotropic electrically conductive film tape proposed in order to prevent ACF of an ACF tape from adhering to a chuck | zipper. It is the figure which showed an example of the chuck | zipper proposed in order to prevent ACF of an ACF tape from sticking to a chuck | zipper.

[Configuration of Example]
As shown in FIG. 1, the ACF adhering device according to the embodiment of the present invention includes a press contact head 1, an ACF tape reel holding unit 2, an ACF tape press 3, a hollow unit 4, an adhering roller 5, A backup 6, a moving chuck 7, a fixed chuck 8, and a suction nozzle 9 are included. A display panel 10 is mounted on the backup 6 as an object to be pasted with the ACF.

  In particular, this ACF adhering apparatus has a structure in which a pair of chuck claws that sandwich the ACF tape 101 can be opened and closed horizontally (separated and approached) in the moving chuck 7 and the fixed chuck 8, and further in the same direction as the chuck claws. It has a lift pin that extends and can be moved up and down and moved back and forth in the extending direction.

[Operation of the embodiment]
First, the structure of the ACF tape (anisotropic conductive tape) 101 will be described with reference to FIG. The ACF tape 101 has a structure in which the ACF 103 as a main material is applied to the base film 102. For example, the ACF tape 101 is a thin thin tape having a total thickness of 70 μm and a width of about 2 mm, and is wound around a reel with a length of about 100 m. Provided. The base film 102 is a resin film having a thickness of about 50 μm. The ACF 103 is applied to the base film 102 by dispersing conductive particles having a particle diameter of several μm in a thermosetting epoxy resin or acrylic resin adhesive to a thickness of 15 to 25 μm. The ACF 103 is cured by being heated and pressurized to about 180 to 200 ° C. and adheres the object, but it is sticky even at room temperature.

  In FIG. 1, the ACF tape 101 is pulled out with the ACF 103 facing the lower surface immediately below the pressure contact head 1.

  Next, the configuration and operation of the moving chuck 7 and the fixed chuck 8 will be described with reference to FIG. Since the moving chuck 7 and the fixed chuck 8 have the same configuration and operate in the same manner, the moving chuck 7 will be described below.

Configuration of Moving Chuck (Fixed Chuck) The moving chuck 7 has a pair of chuck claws 71 that are horizontally aligned with respect to the drawing (conveying) direction of the ACF tape 101 and perpendicular to the drawing direction. The ACF tape 101 is clamped by approaching and moving away. The ACF tape 101 is disposed so as to pass below the pair of chuck claws 71, and can be opened and closed (separated and approached) in the left-right direction by the open / close cylinder 74 in the left front view of FIG. Yes.

  The moving chuck 7 also includes lift pins 72 that extend in the same direction as the pair of chuck claws 71 and are movable up and down between the pair of chuck claws 71 when in the open state. The lift pin 72 can be moved in the vertical direction by the upper and lower cylinders 73 in the front view of FIG. 3, and can be moved (moved forward and backward) by the forward / backward cylinder 75 in the side view on the right side of FIG. It is configured. Hereinafter, the leftward movement in the side view of FIG. 3 is referred to as forward movement, and the rightward movement is referred to as backward movement. The lift pin 72 is subjected to an adhesion reduction treatment, for example, a Teflon (registered trademark) coating on at least its surface.

Operation of Moving Chuck (Fixed Chuck) In FIG. 3A, the pair of chuck claws 71 are opened, and the lift pins 72 are in the advanced state at the lower limit position. At this time, the ACF tape 101 is between the lower surfaces of the pair of chuck claws 71 and the lift pins 72.

  In FIG. 3B, the lift pin 72 is raised to the upper limit position with the pair of chuck claws 71 open. Then, the ACF tape 101 is lifted upward by the lift pins 72.

  In FIG. 3C, the ACF tape 101 is clamped by closing the pair of chuck claws 71 in a state where the lift pins 72 are at the upper limit position. In particular, the pair of chuck claws 71 sandwich the base film 102 side without touching the ACF 103 on the lower surface side of the ACF tape 101. Thereafter, with the pair of chuck claws 71 closed, the lift pins 72 are retracted to complete the clamping (FIG. 3D). FIG. 3D shows a state in which the lift pin 72 is lowered to the lower limit position after retreating.

  In FIG. 3 (e), after the lift pins 72 are retracted and lowered, the pair of chuck claws 71 are opened to release the ACF tape 101.

  The above configuration and operation are the same in the fixed chuck 8.

  Next, the operation of the entire ACF pasting apparatus will be described with reference to FIG. For the sake of convenience, the description of the operation shown in FIG. 4 is made assuming that the ACF is pasted on a certain display panel and the next display panel 10 is mounted on the backup 6.

  In FIG. 4A, the press contact head 1 is at the upper limit position, and the adhering roller 5 is at an initial position close to the ACF tape presser 3. In the ACF tape 101 from the fixed chuck 8 to the ACF tape presser 3, the ACF 103 is peeled from the base film 102. The base film 102 is clamped by the fixed chuck 8 according to the operating principle described with reference to FIG. On the other hand, the movable chuck 7 is positioned below the pressure contact head 1, and the base film 102 is positioned between the pair of chuck claws 71 in the open state and the lift pins 72 at the lower limit position. In this state, the moving chuck 7 is moved to the ACF tape reel holder 2 side.

  In FIG. 4B, the base film 102 is clamped by the moving chuck 7 according to the operation principle described in FIG. 3, and the fixed chuck 8 releases the base film 102. That is, in the fixed chuck 8, the pair of chuck claws 71 perform an opening operation, and the lift pin 72 performs a series of operations of moving backward and moving to a lower limit position, so that the base film 102 is released.

  In FIG. 4C, with the base film 102 sandwiched, the moving chuck 7 is moved to the right side (fixed chuck 8 side) of the ACF 103 by the required length of the ACF 103 to be attached to the display panel 10, and the ACF tape 101 is moved. Pull out from the ACF tape reel holder 2. In the middle of this, when the ACF tape 101 is pulled out for a predetermined length, the ACF tape presser 3 is lowered, and then the hollow unit 4 is raised, so that the ACF 103 in the rear portion of the ACF 103 to be attached to the display panel 10 is fixed by a certain length. Peel, that is, remove the inside. After completion of the hollowing, the ACF tape presser 3 is raised and the hollowing unit 4 is lowered. As the moving chuck 7 pulls out the ACF tape 101, the base film 102 that has been held by the fixed chuck 8 is sucked into the suction nozzle 9 and discharged.

  Here, the hollow unit 4 has a structure in which an adhesive tape or the like is disposed between two cutting blades, and the two cutting blades cut the ACF 103 and press the adhesive tape against the ACF 103. The ACF 103 is peeled for a certain length (the distance between two cutting blades). The cutting blade has a protruding length that is 20 to 30 μm longer than the thickness of the ACF 103 so as not to cut the base film 102.

  Thereafter, the moving chuck 7 pulls out the ACF tape 101 to the position where the display panel 10 is attached, and then opens the pair of claws 71 to release the base film 102. On the other hand, on the fixed chuck 8 side, the base film 102 is clamped by moving the lift pin 72 to the upper limit position and closing the pair of chuck claws 71 immediately before the movable chuck 7 is clamped and released.

  In FIG. 4D, the affixing roller 5 is lowered to the height position of the display panel 10, and then moved rightward (fixed chuck 8 side) in the figure to a position that does not hinder the lowering of the pressure contact head 1. Then, the ACF 103 is temporarily attached to the display panel 10.

  In FIG. 4 (e), the pressure contact head 1 is lowered, and the ACF 103 is melted by heating and pressurizing the ACF tape 101, and is finally attached to the display panel 10.

  In FIG. 4 (f), the base film 102 is peeled from the ACF 103 by moving the pressure contact head 1 and then moving it to the initial position in the left direction in the figure with the bonding roller 5 lowered.

  In FIG. 4G, after the peeling of the base film 102 is completed, the attaching operation of the ACF 103 is completed by raising the attaching roller 5. Thereafter, the same operation is repeated.

  When the ACF tape reel is replaced, the ACF tape 101 shown in FIG. 4A is in a state where the ACF 103 is still bonded to the base film 102. In this case, when the moving chuck 7 first clamps the ACF tape 101, there is a possibility that the ACFs 103 sandwiched by the pair of chuck claws 71 in FIG. 3C and FIG. . However, even in such a state, this is only at the time of first clamping, and the ACF 103 in this part is discarded without being used. Does not occur.

[Effect of Example]
As is clear from the above description, in this embodiment, the pair of chuck claws of the movable chuck and the fixed chuck that sandwich the ACF tape are configured so as not to touch the ACF. On the other hand, the lift pin touches the ACF, but the ACF tape is retracted and pulled out while the ACF tape is sandwiched between the pair of chuck claws. Thereby, the following effects are acquired.

  1) ACF sticks to a moving chuck or a fixed chuck, and when the ACF is operated in this state, a failure in which the ACF is entangled with each part of the ACF sticking apparatus can be eliminated and the operating rate can be improved.

  2) Affixing to the display panel due to the ACF sticking to the moving chuck or the fixed chuck is eliminated (position shift, no ACF, overlap, etc.), and the yield rate is improved.

  3) After the replacement of the ACF tape reel or the failure treatment of the ACF adhering apparatus, the ACF removal work of the portion where the moving chuck and the fixed chuck sandwich the ACF tape becomes unnecessary, and the productivity is improved.

  As described above, the present invention has been described using the embodiment in which the ACF is pasted on the display panel. However, the ACF pasting apparatus and the pasting method according to the present invention are flat panel displays (LCD, PDP, electronic paper, EL, FED, etc.). In addition, the present invention can be applied to all electronic devices including a circuit board that performs electrical connection using an ACF.

DESCRIPTION OF SYMBOLS 1 Pressure contact head 2 ACF tape reel holding | maintenance part 3 ACF tape holding | maintenance unit 4 Hollow-out unit 5 Sticking roller 6 Backup 7 Moving chuck 8 Fixed chuck 9 Suction nozzle 10 Display panel 71 Chuck claw 72 Lift pin

Claims (6)

Anisotropic conductive film for attaching the anisotropic conductive film in an anisotropic conductive tape obtained by bonding a base film and an anisotropic conductive film having adhesiveness to a part that requires electrical connection in an object In the pasting device,
A fixed chuck for sandwiching the anisotropic conductive tape at a predetermined position, and a moving chuck for clamping and pulling out the anisotropic conductive tape on the upstream side of the fixed chuck,
Each of the fixed chuck and the movable chuck is a pair of lines arranged in parallel so as to be able to approach and separate from each other along the anisotropic conductive tape with the anisotropic conductive film on the lower side. A chuck pin and a lift pin configured to extend in the same direction as the pair of chuck claws and move up and down between the pair of chuck claws when in a separated state and to advance and retreat in the extending direction;
Each of the fixed chuck and the movable chuck has the lift pin in the upper limit position in a state where the anisotropic conductive tape is between the pair of chuck claws and the lift pin in the lower limit position when in the separated state. And then lifting the lift pin back so that a part of the portion lifted upward by the lift pin is clamped by the pair of chuck claws. Isotropic conductive film pasting device. Each of the fixed chuck and the movable chuck lowers the lifted retracted pin to the lower limit position and then moves forward to release the pair of chuck chucks that are approached, thereby releasing the holding of the anisotropic conductive tape. The anisotropic conductive film sticking apparatus according to claim 1 , wherein: The anisotropic conductive film sticking apparatus according to claim 1 , wherein at least a surface of the lift pin is subjected to adhesion reduction treatment. Furthermore, a backup unit for mounting the object,
A reel portion winding and holding the anisotropic conductive tape;
An affixing roller for affixing the anisotropic conductive film to a portion requiring electrical connection in the object mounted on the backup unit and for peeling the base film from the affixed anisotropic conductive film When,
A pressure contact head for applying pressure and heat treatment to the pasted anisotropic conductive film;
A hollow unit for removing a part of the anisotropic conductive film in the anisotropic conductive tape on the upstream side of the press contact head;
The anisotropic conductive film sticking apparatus according to any one of claims 1 to 3 , further comprising: Anisotropic conductive film for attaching the anisotropic conductive film in an anisotropic conductive tape obtained by bonding a base film and an anisotropic conductive film having adhesiveness to a part that requires electrical connection in an object In the pasting method,
Using a fixed chuck for sandwiching the anisotropic conductive tape at a predetermined position, and a moving chuck for sandwiching and pulling out the anisotropic conductive tape on the upstream side of the fixed chuck,
A pair of the fixed chuck and the moving chuck, which are arranged in parallel so as to be able to approach and separate from each other along the anisotropic conductive tape with the anisotropic conductive film on the lower side. A chuck claw and a lift pin configured to extend in the same direction as the pair of chuck claws and to move up and down between the pair of chuck claws when in a separated state and to advance and retreat in the extending direction. ,
Each of the fixed chuck and the moving chuck has the lift pin in the upper limit position in a state where the anisotropic conductive tape is between the pair of chuck claws and the lift pin in the lower limit position when in the separated state. And then lifting the lift pin back so that a part of the portion lifted upward by the lift pin is clamped by the pair of chuck claws. A method for attaching an anisotropic conductive film. The fixed chuck and the moving chuck are each moved forward by lowering the retracted lift pin to the lower limit position, and the pair of chuck claws approached are released to release the holding of the anisotropic conductive tape. The anisotropic conductive film sticking method according to claim 5 , wherein:

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