JPH0792436A - Method for sticking anisotropically conductive film and its device - Google Patents

Abstract

PURPOSE:To provide a method and device for interposing and sticking anisotropically conductive films between wiring patterns and TAB leads of wiring boards. CONSTITUTION:The anisotropically conductive film and a protective film are peeled and this protective film is taken up. The anisotropically conductive film is drawn out to a prescribed length in a horizontal direction. The drawn out anisotropically conductive film is sucked and fixed by a stationary block 13 and a moving block 15 adjacent to this stationary block 13, both of which blocks respectively have air suction ports. The anisotropically conductive film sucked in such a manner is cut by a cutter 16 existing between the stationary block 13 and the moving block 15 and the anisotropically conductive film sucked to the moving block 15 is aligned to the wiring board 25 and stuck to the prescribed position. As a result, the workability is extremely better than with the conventional method and device and the exact aligning and sticking of the anisotropically conductive film are possible.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anisotropic conductive film sticking method for sticking an anisotropic conductive film between a wiring pattern of a wiring board such as a liquid crystal panel and a TAB lead. And its device.

[0002]

2. Description of the Related Art Conventionally, a liquid crystal panel (not shown) is one of the components constituting a liquid crystal display. As one of the methods of connecting the terminals of the liquid crystal panel and the TAB (not shown), an anisotropic conductive film is interposed between the liquid crystal panel and the TAB lead to heat and press them to connect them. There is a way.

As shown in FIG. 12, this anisotropic conductive film 1 is a polymer layer formed by uniformly dispersing conductive particles in an adhesive (resin), and by thermocompression bonding, Conductivity is obtained only in the thickness direction of the film, and the other direction has electrical anisotropy indicating insulation. As described above, the anisotropic conductive film 1 which is a polymer layer has a two-layer or three-layer structure in which one side or both sides are covered with the protective films 2 or 2, 3 and has a width of about 3 mm and a thickness of about 3 mm. The anisotropic conductive film tape 4 having a thickness of about 100 μm is wound around the reel.

Therefore, after the protective films 2 or 3 on both sides or one side of the anisotropic conductive film tape 4 are peeled off, the anisotropic conductive film 1 is connected to the terminals of the liquid crystal panel and the TA.
The terminals of the liquid crystal panel and the TAB are electrically connected to each other by positioning them with B and by thermocompression bonding, or by adhering by utilizing the thermosetting property of the resin in the anisotropic conductive film 1. It is connected.

As described above, as a method of attaching the anisotropic conductive film 1 to the terminals of the liquid crystal panel, the operator manually puts the anisotropic conductive film tape 4 in the length of TAB, that is, 35 to 70.
The protective film 2 and 3 are peeled off while being cut to a length of about mm, and only the anisotropic conductive film 1 is connected to the terminal and the TAB
The method of positioning and adhering between and is adopted.

[0006]

[Problems to be Solved by the Invention] However, TA
Anisotropic conductive film tape 4 cut to a length of B
Since is a flexible and long and slender product, it is troublesome to handle and is not suitable for mass production. In addition, there was a problem that the accuracy of alignment to the attachment position was poor. Also, protective film 2,
There were also problems such as difficulty in peeling off No. 3.

[0007]

According to the present invention, the anisotropic conductive film and the protective film are peeled off, the protective film is wound, and the anisotropic conductive film is pulled out by a predetermined length in the horizontal direction. The drawn anisotropic conductive film is adsorbed and fixed by a fixed block having an air inlet and a movable block adjacent to the fixed block, and the adsorbed anisotropic conductive film is fixed and movable blocks. It is cut by a cutter located between the and, and the anisotropic conductive film adsorbed on the movable block is aligned with the wiring board and attached to a predetermined position.

[0008]

FUNCTION The protective film 2 is peeled off from the tip of the anisotropic conductive film tape 4 and the protective film winding reel 12 is provided.
At the same time, the tip of the anisotropic conductive film 1 is gripped and fixed to the chuck unit 19. Next, the suction devices of the fixed block head 13 and the suction block head 15 are driven, and the anisotropic conductive film 1 held by the chuck unit 19 is sucked by the fixed block head 13.

In this state, the chuck unit 19 starts to move, the anisotropic conductive film 1 is pulled out from the reel 11, and the protective film 2 is wound into the protective film winding reel 12.
To be wound up. The chuck unit 19 moves to a predetermined position and stops. Next, the suction block head 15 descends, and the anisotropic conductive film 1 is sucked by the fixed block head 13 and the suction block head 15. Then, the cutter 16 descends and the anisotropic conductive film 1 is cut.

[0010]

Embodiments of the present invention will be described in detail with reference to FIGS. FIG. 1 shows an embodiment of the present invention, and is a perspective view of a principal part of an anisotropic conductive film sticking apparatus 10, and FIGS. 2 to 6 are conceptual views of FIG. Figure 7
Is an explanatory view of main parts, FIGS. 8 to 11 are flowcharts, and FIG.
2 is a cross-sectional view of a three-layer anisotropic conductive film tape 4. In this embodiment, the case where the two-layered anisotropic conductive film tape 4 is attached to the liquid crystal panel 25 will be described, and the same parts as those in the conventional example will be described with the same names and numbers. .

1 to 7, 10 is a device for attaching an anisotropic conductive film, 11 is a reel on which an anisotropic conductive film tape 4 is wound, and 12 is a peeled protective film 2. It is a reel for winding a protective film. When the three-layered anisotropic conductive film tape 4 is used, a second protective film take-up reel is further provided to take up the protective film 3.

A fixed block head 13 is fixed at a fixed position, and has a hollow rectangular inside as shown in FIG. 7, and the anisotropic conductive film 1 is damaged on the lower surface. It is slidably and flatly formed without
An air suction port 14 having a width of about 2 to 5 mm is formed so as to be long in the traveling direction of the anisotropic conductive film 1.

The air suction port 14 is not limited to the one having a long hole shape as in this embodiment, and the same action and effect can be obtained even if a plurality of holes are formed at appropriate places.
Further, a suction device (not shown) for sucking the internal air is attached to the upper end of the air suction port 14
It is configured so that air is sucked from the air and exhausted to the outside. Therefore, the anisotropic conductive film 1 can be adsorbed on the lower surface of the fixed block head 13.

Reference numeral 15 is a suction block head provided with a mechanism (not shown) which can be moved in the vertical direction and the front-back direction by a cylinder, which is arranged adjacent to the fixed block head 13 and is almost the same as the fixed block head 13. It is formed in a shape and a structure, and like the fixed block head 13, the anisotropic conductive film 1 can be adsorbed and fixed to the lower surface.

Reference numeral 16 is a cutter for cutting the anisotropic conductive film 1, which is fixed to a cylinder (not shown) and is arranged between the fixed block head 13 and the suction block head 15. , A pair of cutter pieces 16a and 16b are vertically fixed to a cylinder (not shown) with a cutter groove 18 being transparently provided on the work table 17, and the cylinder moves up and down. Then, the anisotropic conductive film 1 adsorbed by the fixed block head 13 and the adsorption block head 15 is cut.

A chuck unit 19 uses a pulse motor (not shown) as a driving means in this embodiment, and measures the number of pulses corresponding to a predetermined length of the anisotropic conductive film 1. Thus, the pulse motor is stopped when the tip of the anisotropic conductive film 1 is gripped by the clamp 20 of the chuck unit 19 and pulled out by a predetermined length in the traveling direction.

Incidentally, like the fixed block head 13 and the suction block head 15, the tip of the anisotropic conductive film 1 may be sucked and pulled out by a suction device. In this case, the suction device is the fixed block head 1
3 and the suction block head 15 can be shared.

Reference numeral 21 is a moving table, and a liquid crystal panel 25 is placed on the upper surface thereof and is constructed so as to move along the guide rail 22. Reference numerals 23 and 24 denote guide rollers, which are guided by applying an appropriate tension to the transferred anisotropic conductive film 1.

Next, the operation will be described based on the conceptual diagrams shown in FIGS. 2 to 7 and the flowcharts shown in FIGS. 8 to 11. First, after setting initial conditions such as the amount of withdrawal of the anisotropic conductive film 1 (step 30), the positions of mechanical parts such as the positions of the chuck unit 19 and the suction block head 15 are initialized to predetermined positions. (Step 31). In this initial state, the anisotropic conductive film tape 4 is wound around the reel 11, the cutter 16 is vertically spaced apart, and the suction block head 15 is located above.

Then, as shown in FIG. 2, the protective film 2 is peeled from the tip of the anisotropic conductive film tape 4 and fixed to the protective film take-up reel 12 (step 32), and the chuck unit is also used. The tip of the anisotropic conductive film 1 is gripped and fixed to 19 (step 3).
3).

When the start switch is turned on (step 34), the suction devices of the fixed block head 13 and the suction block head 15 are driven, and the chuck unit 19 is activated.
The anisotropic conductive film 1 held by is adsorbed to the fixed block head 13. In this state, the chuck unit 19
Is started to move (step 35), the anisotropic conductive film 1
Is taken out from the reel 11, and the protective film 2 is wound around the protective film take-up reel 12. At this time, appropriate tension is applied to the anisotropic conductive film 1 by the guide rollers 23 and 24.

As shown in FIG. 3, the chuck unit 19
It has been judged whether or not has moved to a predetermined position which has been initialized (step 36). If YES, the chuck unit 19 is stopped (step 37). Next, the suction block head 15 starts to descend by the cylinder (step 38), and it is determined whether or not the cylinder has descended to a predetermined position of the suction block head 15 (step 39), Y
At the time of ES, the lowering of the suction block head 15 is stopped (step 40).

Next, when the lowering of the suction block head 15 is stopped (step 40), the cutter 16 starts to descend (step 41). It is judged whether or not the cutter cylinder has descended to a predetermined position (step 42), and Y
In the case of ES, the lowering of the cutter 16 is stopped (step 43), and the anisotropic conductive film 1 is cut as shown in FIG. 4 (step 44).

When the cutting of the anisotropic conductive film 1 is confirmed (step 45), as shown in FIG.
The clamp 9 is released (step 46), and the suction block head 15 moves toward the liquid crystal panel 25 mounted on the moving table 21 in a state where the cut anisotropic conductive film 1 is sucked. Start (step 47).

The suction block head 15 is a liquid crystal panel 25.
It is determined whether or not it is located at the predetermined position above (step 48), and if YES, the anisotropic conductive film 1 is attached to the liquid crystal panel 25 (step 49).

When the sticking is completed (step 50), the suction block head 15 and the chuck unit 19 are returned to the start positions (step 51) and (step 52). In this way, the anisotropic conductive film tape 4 wound around the reel 11 is successively wound on the liquid crystal panel 2.
No. 5 is attached, and it is judged whether all liquid crystal panels 25 have been attached (step 53). If YES, all steps are finished (step 54). N
In the case of O, since the anisotropic conductive film tape 4 still remains on the reel 11, the process returns to FIG. 9B, and the attaching process is continued.

[0027]

The present invention separates the anisotropic conductive film and the protective film, winds the protective film, and
The anisotropic conductive film is drawn horizontally for a predetermined length, and the drawn anisotropic conductive film is adsorbed and fixed by a fixed block having an air inlet and a movable block adjacent to the fixed block. The adsorbed anisotropic conductive film is cut by a cutter located between the fixed block and the movable block, and the anisotropic conductive film adsorbed on the movable block is aligned with the wiring board to a predetermined position. Since the sticking is performed, the anisotropic conductive film is held and fixed by the fixed block head and the suction block head in a state of being held and fixed, and is configured to be cut by a cutter, and is automatically stuck. Therefore, the workability is much better than the conventional one, and the anisotropic conductive film can be accurately positioned and attached.

[Brief description of drawings]

FIG. 1 is a perspective view of an essential part showing an embodiment of the present invention.

FIG. 2 shows an embodiment of the present invention and is a partial process drawing of the anisotropic conductive film attaching apparatus.

FIG. 3 shows an embodiment of the present invention and is a partial process drawing of the anisotropic conductive film attaching apparatus.

FIG. 4 shows an embodiment of the present invention and is a partial process drawing of the anisotropic conductive film attaching apparatus.

FIG. 5 shows an embodiment of the present invention and is a partial process drawing of the anisotropic conductive film attaching apparatus.

FIG. 6 shows an embodiment of the present invention and is a partial process drawing of the anisotropic conductive film attaching apparatus.

FIG. 7 is a perspective view of essential parts of a fixed block head and a suction block head according to the embodiment of the present invention.

FIG. 8 is a flow chart showing an embodiment of the present invention.
Is part of

FIG. 9 shows an embodiment of the present invention.
Is part of

FIG. 10 shows an embodiment of the present invention and is a part of a flowchart.

FIG. 11 shows an embodiment of the present invention and is a part of a flow chart.

FIG. 12 is a sectional view of an anisotropic conductive film tape.

[Explanation of symbols]

 1 ... Anisotropic conductive film 2 ... Protective film 3 ... Protective film 4 ... Anisotropic conductive film tape 10 ... Anisotropic conductive film Attaching device 11 ... Reel 12 ... Protective film winding device 13 ... Fixed block head 14 ... Air suction port 15 ... Suction block head 16 ... Cutter 19 ... Chuck unit 25 ... Liquid crystal panel (wiring board)

Claims (3)

[Claims] 1. An anisotropic conductive film sticking method for sticking a tape-shaped anisotropic conductive film covered with a protective film onto a wiring substrate on which a wiring pattern is formed, The anisotropic conductive film is peeled off from the anisotropic conductive film, the protective film is wound up, and the anisotropic conductive film is pulled out by a predetermined length in the horizontal direction. And a movable block adjacent to the fixed block. The anisotropic conductive film thus attracted is cut by a cutter located between the fixed block and the movable block. A method for attaching an anisotropic conductive film, wherein the anisotropic conductive film adsorbed to the movable block is aligned with the wiring board and attached at a predetermined position. 2. An anisotropic conductive film sticking device for sticking a tape-shaped anisotropic conductive film covered with a protective film onto a wiring substrate on which a wiring pattern is formed, A reel around which an anisotropic conductive film tape covered with a film is wound, a reel around which the peeled protective film is wound up, and means for drawing out the anisotropic conductive film to a predetermined length. A fixed block having a means for adsorbing the anisotropic conductive film, and arranged adjacent to the fixed block,
A movable block having means for adsorbing the anisotropic conductive film, and a cutter interposed between the fixed block and the movable block for cutting the anisotropic conductive film into a predetermined length. An anisotropic conductive film sticking device comprising: 3. A tape whose both sides are covered with protective films.
The adhesive according to claim 2, characterized in that when the anisotropic conductive film having a strip shape is attached to the wiring board, a reel is provided around which the peeled protective films on both sides are respectively wound. A device for sticking a conductive film.