KR100643434B1 - Pressing toolbar for anisotropic conductive film and bonding device using same - Google Patents

Abstract

The present invention relates to a pressing toolbar of an anisotropic conductive film and a bonding apparatus using the same. According to the present invention, in a crimping toolbar provided in a bonding apparatus for crimping an anisotropic conductive film onto a member to be connected, the crimping toolbar may be patterned such that a surface contacting the member to be connected is patterned with an electrode pitch of the member to be connected. And an induction part arranged at a position corresponding to the electrode and guiding conductive particles in the anisotropic conductive film toward the electrode side; and a non-induction part disposed at a position corresponding to the space between the electrodes. A crimping tool bar is disclosed.

Anisotropic conductive film, crimping toolbar, bonding, induction

Description

Pressing tool bar for anistropic conductive film and bonding devece using the same}

The following drawings attached to this specification are illustrative of preferred embodiments of the present invention, and together with the detailed description of the invention to serve to further understand the technical spirit of the present invention, the present invention is a matter described in such drawings It should not be construed as limited to.

1 is a cross-sectional view showing a state in which a general anisotropic conductive film is interposed between a member to be connected.

2 is a cross-sectional view showing a state in which a general anisotropic conductive film connects a member to be connected.

3 schematically illustrates a bonding apparatus according to a preferred embodiment of the present invention.

4 schematically illustrates a crimping toolbar in accordance with a preferred embodiment of the present invention.

5 is a cross-sectional view schematically showing a state in which a crimping toolbar compresses an anisotropic conductive film according to a preferred embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

110. Supply reel 120 ... Recovery reel

130 Crimping toolbar 131 Patterning section

132 ... Induction Division 133 ... Induction Division

140.Transportation 150 ... Branch rollers

160 ... clamp

The present invention relates to a crimping toolbar of an anisotropic conductive film and a bonding apparatus using the same, and more particularly, to a crimping toolbar for compressing an anisotropic conductive film electrically connecting a member to be connected and a bonding apparatus using the same.

In general, anisotropic conductive film (ACF) is a connection material that is used when the material of the connected member is special or the pitch of signal wiring is minute and the member and the member cannot be attached by soldering. .

The anisotropic conductive film is typically used as a connection material for packaging LCD panels, printed circuit boards (PCBs), driver IC circuits, etc. in LCD modules. In more detail, a plurality of driver ICs are mounted in the LCD module to drive thin film transistor (TFT) patterns. The driver IC is largely mounted on the LCD panel through the COG (Chip On Glass) mounting method, which is a method of mounting the LCD panel in the gate area and the data area without a separate structure, and the Tape Carrier Package (TCP) equipped with the driver IC. It is divided into TAB (Tape Automated Bonding) mounting method, which indirectly mounts driver ICs in the gate area and data area.

Regardless of which mounting method is employed, the electrodes on the driver IC element side and the electrodes on the LCD panel side are formed at minute pitch intervals, so that it is difficult to use a means such as soldering. For this reason, an anisotropic conductive film is used to electrically connect the electrode on the driver IC side and the electrode on the panel side.

Referring to FIG. 1, the anisotropic conductive film 30 according to the related art is obtained by dispersing conductive particles 50 in an insulating adhesive 40, and is thermally compressed by being interposed between the connected members 10 and 20. Then, as shown in FIG. 2, the conductive particles 50 are interposed between the opposing electrodes 11 and 21 to electrically interconnect the electrodes 11 and 21, and have insulating properties between neighboring electrodes. Keep it. That is, the anisotropic conductive film 30 is a connection material which maintains insulation on the x-y plane and has conductivity on the z-axis.

The anisotropic conductive film 30 is bonded to the member to be connected using a bonding apparatus. More specifically, the bonding apparatus according to the prior art unwinds sequentially in a state in which the anisotropic conductive film 30 is wound on a wound supply reel and then transports onto the connected members 10 and 20. Then, the anisotropic conductive film 30 is crimped | bonded at the predetermined position of the to-be-connected member 10 and 20 by a crimping | compression-bonding part. At this time, the pressing tool bar provided on the pressing part directly presses heat and pressure to the anisotropic conductive film 30.

However, in the general anisotropic conductive film 30, the conductive particles 50 included in the film are not sufficiently interposed between the electrodes 11 and 21 after the adhesive members are bonded to each other, so that the electrodes 11 and 21 are not. There is a problem of not being sufficiently electrically connected. In order to solve this problem, when the density of the conductive particles 50 is increased in the anisotropic conductive film 30, the conductive particles 50 electrically connect between adjacent electrodes 21. There is a problem that (short) may occur.

The present invention has been devised to solve the above problems, and when the anisotropic conductive film is pressed onto the member to be connected, the conductive particles contained in the anisotropic conductive film are concentrated between the electrodes to more effectively electrically connect the electrodes of the member to be connected. It is an object of the present invention to provide a crimping toolbar.

In addition, another object of the present invention is to provide a bonding apparatus for an anisotropic conductive film using such a pressing toolbar.

A crimping toolbar according to the present invention for achieving the above object is a crimping toolbar provided in the bonding apparatus for crimping the anisotropic conductive film to the member to be connected, wherein the crimping toolbar is formed on the surface of the member to be contacted with the member to be connected. A patterning part patterned to be the same as an electrode pitch, wherein the patterning part is disposed at a position corresponding to the electrode, and an induction part for guiding conductive particles in an anisotropic conductive film toward an electrode side; and disposed at a position corresponding to a space between the electrodes. It is characterized in that it comprises a non-induction portion.

Preferably, the induction part may be configured to have magnetic properties.

Here, the induction part may be made of a permanent magnet.

According to another aspect of the present invention, in a bonding apparatus having a crimping toolbar for crimping an anisotropic conductive film onto a member to be connected, the crimping toolbar has the same electrode pitch as that of the member to be contacted with the surface to be contacted. And a patterning part to be patterned, wherein the patterning part is disposed at a position corresponding to the electrode and guides conductive parts in the anisotropic conductive film to the electrode side; and a non-induction part disposed at a position corresponding to the space between the electrodes. A bonding apparatus is disclosed.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the specification and claims should not be construed as having a conventional or dictionary meaning, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention. Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

3 is a view schematically showing a bonding apparatus according to a preferred embodiment of the present invention.

Referring to FIG. 3, the bonding apparatus according to the present invention transfers the supply reel 110 and the anisotropic conductive film 30 on which the anisotropic conductive film 30 is wound onto the connected member 20. ), A pressing toolbar 130 for pressing the transferred anisotropic conductive film 30 and a recovery reel 120 for recovering the release film 32 of the pressed anisotropic conductive film 30.

The supply reel 110 is mounted to the bonding apparatus in a state in which the anisotropic conductive film 30 is wound and sequentially unwinds the anisotropic conductive film 30 to be supplied toward the crimping toolbar 130.

The recovery reel 120 winds up and recovers the release film 32 attached to the back surface of the anisotropic conductive film 30 after the anisotropic conductive film 30 is pressed against the member to be connected 20.

The transfer means 140 is located in a predetermined portion of the path of the anisotropic conductive film 30 to transfer the anisotropic conductive film 30 to the crimp position.

The crimping toolbar 130 compresses the anisotropic conductive film 30 in accordance with the electrode pitch of the member to be connected 20 by heat and pressure.

4 is a cross-sectional view showing in detail the crimping toolbar 130 according to a preferred embodiment of the present invention, Figure 5 is a crimping toolbar 130 according to a preferred embodiment of the present invention crimping the anisotropic conductive film 30 It is sectional drawing which shows schematically how.

4 and 5, the crimping toolbar 130 includes a patterning part 131 patterned to be equal to the electrode pitch of the member 20 to be connected.

The patterning unit 131 is provided to correspond to a pitch of an electrode provided at a predetermined distance to an outer lead bonding (OLB) or printed curcuit board (PCB) of a member to be connected, for example, an LCD panel. In addition, the patterning unit 131 includes an induction part 132 and a non-induction part 133.

The induction part 132 is disposed to correspond to the position of the electrode of the to-be-connected member, and is configured such that conductive particles existing in the anisotropic conductive film have an induction force that can be induced in the electrode part.

Preferably, the induction part 132 is configured to have magnetic properties to induce conductive particles. In more detail, the induction part 132 may be made of a permanent magnet. Thereby, the number of the electroconductive particle which energizes between electrodes can be increased, without excessively increasing the density of electroconductive particle in an anisotropic conductive film.

Although the specific configuration of the induction part 132 is disclosed above, since the technical idea of the present invention is to guide the position of the conductive particles in the anisotropic conductive film around the electrode, various materials or methods are modified within the object of the present invention. It should be understood that it can be adopted.

The non-induction part 133 is disposed to correspond to the space between the electrodes of the member to be connected and is a part which does not induce conductive particles existing in the anisotropic conductive film. Therefore, the density of the electroconductive particle becomes smaller in the space between the electrodes corresponding to the non-induction part 133 than the periphery of an electrode. As a result, the conductive particles present in the anisotropic conductive film in a limited manner can be used more effectively to electrically connect the electrodes. The non-induction part 133 may be a variety of materials such as conventional metal or insulating material.

Meanwhile, the bonding apparatus separates the release film 32 attached to the back surface of the anisotropic conductive film 30 from the anisotropic conductive film 30 after the anisotropic conductive film 30 is pressed onto the connected member 20. Branching roller 150 may be further included. In addition, it may further include a clamp 160 for stably maintaining the transfer of the anisotropic conductive film 30 unwound from the supply reel (110).

Hereinafter, the operation of the pressing toolbar 130 will be described with reference to FIGS. 3 and 5.

When the anisotropic conductive film 30 is unwound from the supply reel 110 and then transferred to the to-be-connected member 20 by the conveying means 140, the crimping toolbar 130 driven by the crimp driving unit 170 is Heat and pressure are transferred directly to the anisotropic conductive film 30. In this case, the induction part 132 of the crimping toolbar 130 is positioned to correspond to the electrodes 11 and 21 of the member 10 and 20 to be connected to the conductive particles 50 present in the anisotropic conductive film 30. As shown by the arrow, for example, magnetic is induced around the electrodes 11 and 21. Therefore, conductive particles can be prevented from being wasted in spaces 11 'and 21' other than the electrodes 11 and 21 and disposed more between the electrodes 11 and 21, thereby enabling effective energization. .

Meanwhile, in the crimping process of the anisotropic conductive film 30, the pressing tool 130 directly compresses the anisotropic conductive film 30 and press-bonds it to the lower to-be-connected member 20 and the upper part on the anisotropic conductive film 30. It is divided into the main pressing process of disposing the member to be connected 10 and transferring pressure and heat to the anisotropic conductive film 30 through the upper member 10 to be connected. In FIG. 5, the present crimping process is shown in which the anisotropic conductive film 30 is sandwiched between the members 10 and 20 to be crimped onto the crimping toolbar 130 on the upper part of the connected member 10. In addition to the crimping process, the crimping toolbar 130 according to the present invention may conduct conductive particles 50 in the temporary crimping process, which is performed without interposing the contact member 10 between the crimping toolbar 130 and the anisotropic conductive film 30. (21) Of course, it can be concentrated around.

Although the specific configuration of the bonding apparatus has been disclosed in the present embodiment, the technical idea of the present invention is in a crimping toolbar for guiding conductive particles in an anisotropic conductive film to the electrode side, and other specific configurations of the bonding apparatus except for this are in the field to which the present technology belongs. It should be understood that various modifications may be employed by those skilled in the art.

As described above, although the present invention has been described by way of limited embodiments and drawings, the present invention is not limited thereto and is intended by those skilled in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of equivalents of the claims to be described.

As described above, according to the present invention, the conductive particles contained in the anisotropic conductive film can be concentrated between the electrodes when the anisotropic conductive film is pressed against the member to be connected. Therefore, the electrodes of the connected member can be electrically connected more effectively without excessively increasing the density of the conductive particles present in the anisotropic conductive film.

Claims (6)

In the crimping toolbar provided in the bonding apparatus for crimping the anisotropic conductive film to the member to be connected, The crimping toolbar has a patterning part that is patterned to be the same as the electrode pitch of the member to be connected to a surface in contact with the member to be connected, and the patterning part includes: An induction part disposed at a position corresponding to the electrode and inducing conductive particles in the anisotropic conductive film to the electrode side; and And a non-induction part disposed at a position corresponding to the space between the electrodes. The method of claim 1, Compression toolbar, characterized in that the induction has a magnetic. The method of claim 2, The induction part crimping toolbar, characterized in that made of a permanent magnet. In the bonding apparatus provided with the crimping toolbar and crimping | bonding an anisotropic conductive film to a to-be-connected member, The crimping toolbar has a patterning part that is patterned on the surface of the contacting member to be contacted with the electrode pitch of the member to be connected, and the patterning part includes: An induction part disposed at a position corresponding to the electrode and inducing conductive particles in the anisotropic conductive film to the electrode side; and And a non-induction part disposed at a position corresponding to the space between the electrodes. The method of claim 4, wherein Bonding device, characterized in that the induction portion has a magnetic. The method of claim 5, Bonding device, characterized in that the induction portion is made of a permanent magnet.

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