JP5349779B2 - Tape sticking device and manufacturing method of flat display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To insure a device the process operations of peeling and sucking the piece of an adhesive tape from and to a continuous belt-like support sheet are efficiently carried out at the time of manufacturing a flat panel display device etc., and the equipment load and process load for the process operations can be reduced. <P>SOLUTION: The device includes a sucking head 4 performing the operation to suck the piece of the adhesive tape 21, and to stick the piece of the tape to the prescribed point of a work 3, an air blow nozzle 65 for peeling the piece of the adhesive tape 21, a work sucking table 5, reduced pressure piping for the sucking effect of the sucking head 4, and an ejector 1 for vacuum of which an exhaust pipe to the air blow nozzle 65 is connected to an exhaust port. The sucking and the air blow are performed only by a solenoid valve 11 for controlling introduction of a high pressure gas to the ejector for vacuum. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  In the present invention, an anisotropic conductive film (ACF), a light-shielding film, a double-sided adhesive tape, and other adhesive tape are attached to a predetermined portion of a liquid crystal display device or other display panel or a drive circuit board therefor (temporary mounting; pre The present invention relates to a tape applicator for mounting and a method for manufacturing a flat display device using the same.

  2. Description of the Related Art Flat display devices such as liquid crystal display devices are widely used as image display devices for various computers, portable terminal devices, and the like by taking advantage of thinness, light weight, and low power consumption. In particular, it has come to be widely used for small portable televisions, large wall-mounted televisions, small notebook personal computers and other portable information terminals, and image display devices for in-car car navigation systems. It was.

  Hereinafter, a light transmission type active matrix liquid crystal display device will be described as an example, and its configuration will be briefly described.

  In general, in an active matrix liquid crystal display device, a matrix array substrate (hereinafter referred to as an array substrate) and a counter substrate are arranged close to each other at a predetermined interval, and an alignment film provided on the surface layer of both substrates in the interval. The liquid crystal layer is held through the gap.

  In the array substrate, on a transparent insulating substrate such as glass, for example, signal lines made of an upper metal wiring pattern and scanning lines made of a lower metal wiring pattern are arranged in a lattice shape through an insulating film, and each of the lattices A pixel electrode made of a transparent conductive material such as ITO (Indium-Tin-Oxide) is disposed in a region corresponding to the grid. A switching element for controlling each pixel electrode is disposed at each intersection of the lattice. When the switching element is a thin film transistor (hereinafter abbreviated as TFT), the gate electrode of the TFT is electrically connected to the scanning line, the drain electrode is electrically connected to the signal line, and the source electrode is electrically connected to the pixel electrode. It is connected to the. The counter substrate is configured such that a counter electrode made of ITO or the like is disposed on a transparent insulating substrate such as glass, and if a color display is realized, a color filter layer is disposed.

  In the peripheral portion, for example, on one long side and one short side thereof, the array substrate protrudes from the counter substrate to form a shelf-like region for inputting a drive signal from the outside. In these shelf-like regions, connection pads for inputting drive signals and the like to the signal lines and scanning lines are arranged.

  As a method of arranging a driving IC chip at the peripheral edge and inputting data to the connection pad, an OLB (Outer) for mounting a rectangular flexible wiring called a tape carrier package (TCP) on which a driving IC chip is mounted on a shelf-like region is mounted. There are a Lead Bonding) method and a COG (Chip On Glass) method in which a driving IC chip is directly mounted on a shelf-like region. In such mounting, the terminal surface of the TCP tip or the terminal forming surface of the lower surface of the driving IC chip is mounted on the shelf-like region via a conductive connecting material such as ACF (anisotropic conductive film), In general, the connection pads on the shelf-like region are electrically connected. That is, face-down mounting is performed. Such mounting is generally performed using a thermocompression bonding tool. For example, the thermocompression operation is performed so that the ACF attached to the lower surface of the driving IC chip is heated at 170 to 200 ° C. for 10 to 20 seconds. Do.

  The ACF is usually supplied in a state where it is attached to a base tape made of release paper and wound around a reel, and is attached to a predetermined position of the shelf-like region in a state of being cut to a predetermined size (for example, Patent Documents). 1-3).

Moreover, a tape is also affixed on the liquid crystal display panel obtained as described above for reinforcement or light shielding (for example, Patent Document 4). Furthermore, in order to fix the liquid crystal display panel to a frame or a backlight unit, a double-sided adhesive tape is also used (for example, Patent Document 5).
JP 2003-057681 A JP2003-012222 JP-A-10-135274 JP 2002-169481 JP 2006-106417 A

  When attaching an adhesive tape to a liquid crystal display device or the like, it is efficient if it is performed as follows. First, a strip-shaped adhesive tape piece is prepared by being wound around a reel or the like in a state of being attached to a continuous belt-like flexible support sheet. Next, the support sheet fed from the reel is slid along the upper surface of the table so that the adhesive tape piece comes upward, and then guided downward while being bent at the edge of the table. Then, with the one adhesive tape piece protruding substantially horizontally from the edge of the table, the upper suction head is lowered to capture the adhesive tape piece. At almost the same time as this suction holding, air blow is performed from below to promote peeling of the adhesive tape piece from the support sheet. Thereafter, the suction head is moved to a liquid crystal display panel or other work held by suction or the like, and an adhesive tape piece is attached to a predetermined location on the work.

  In order to perform such adsorption and blow, a plurality of vacuum generators such as vacuum ejectors or vacuum pumps are required, and a plurality of solenoid valves are required for each vacuum generator, and there are some control mechanisms for controlling these solenoid valves. It becomes complicated.

  Therefore, as a result of diligent study, the present inventor, as a result of using only one vacuum generator and one solenoid valve, adsorbs the adhesive tape piece by the adsorption head, air blow for peeling the adhesive tape piece, It came to find the mechanism which can perform all of adsorption holding.

  As described above, the present invention can efficiently perform the process operation of peeling and adhering the adhesive tape piece from the continuous belt-like support sheet and attaching it on a work separately held by suction. Therefore, it is an object of the present invention to provide an apparatus configuration and a manufacturing method that can reduce the apparatus burden and the process burden.

  The tape applicator of the present invention is a tape applicator for separating strip-shaped adhesive tape pieces from a continuous belt-like support sheet and attaching them to a display panel, a drive circuit board for this purpose, or other work. A guide plate for sliding the support sheet, a sheet feeding drive unit for feeding the support sheet while being bent along the edge portion of the guide plate, and an adhesive tape piece partially attached to the support sheet. A suction head that sucks the adhesive tape piece in a state of protruding from the edge portion in the direction along the guide plate and performs a sticking operation to a predetermined portion of the work, and when the suction head captures the adhesive tape piece In addition, an air blow nozzle that blows air to promote the peeling of the adhesive tape piece from the support sheet, a work suction table for holding and holding the work, and a suction head A vacuum ejector in which a decompression pipe for the suction action of the cylinder and a decompression pipe for the suction action on the workpiece suction table are connected to the suction port, and an exhaust pipe to the air blow nozzle is connected to the exhaust port; And an electromagnetic valve that controls introduction of high-pressure gas into the ejector for a vehicle.

  Further, the flat display device manufacturing method of the present invention includes a step of separating a strip-shaped adhesive tape piece from a continuous belt-like support sheet and affixing it to a display panel, a drive circuit board, or other work. A method for manufacturing an apparatus, wherein a support sheet is slid along a front side surface of a guide plate, bent along an edge portion of the guide plate, and sent to the back side of the guide plate. A step of bringing the suction head into contact with or approaching the pressure-sensitive adhesive tape piece with the pressure-sensitive adhesive tape piece protruding from the edge portion in the direction along the plate, and then a suction action by the suction head and a suction by the work suction table The operation and the air blow that promotes the peeling of the adhesive tape are performed simultaneously using the suction and exhaust of the common vacuum generator based on the operation or release of one solenoid valve, and the suction head After the tape piece is attached to the workpiece, the suction action by the suction head, the suction action by the work suction table, and the air blow that promotes peeling of the adhesive tape are simultaneously released or stopped by operating or releasing the one solenoid valve. And a step of performing.

  It is possible to efficiently perform the process operation of peeling and adhering the adhesive tape piece from the continuous belt-like support sheet and sticking it on the separately held workpiece, and reducing the equipment burden and process burden for this process operation. can do.

  An embodiment of the present invention will be described with reference to FIGS.

  The block diagram of FIG. 1, the schematic perspective view of FIG. 2, and the schematic side view of FIG. 3 show the configuration of the main part of the tape applicator according to the embodiment. In addition, in the timing chart of FIG. 4, a specific example of signal input to each operation unit that drives and controls the pasting machine shown in FIGS.

  As shown in FIGS. 2 to 3, the tape applicator 10 peels the strip-shaped adhesive tape piece 21 from the continuous belt-like support sheet 22 and automatically moves to a predetermined location 31 on the upper surface of the flat workpiece 3. Or a device that pastes semi-automatically. In one specific example, the flat workpiece 3 is a liquid crystal display panel, and the adhesive tape piece 21 is affixed to the mounting area of each driving IC chip so that the driving IC chip is mounted on the shelf-shaped peripheral edge 32. is there. The strip-shaped adhesive tape pieces 21 are arranged on the support sheet 22 at predetermined intervals so that the length direction thereof faces the width direction of the support sheet 22.

  The tape applicator 10 includes an adsorbing / adhering head 4 that adsorbs and transports an adhesive tape piece 21 and performs an adhering operation, and a work adsorbing table 5 that places a flat work 3 horizontally and holds it in a position-displaceable state. Including. The suction / sticking head 4 is provided with a vertical movement cylinder 41 and a horizontal feed cylinder 42. The suction / sticking head 4 can be switched and moved between the original height position and the lowered height position for receiving and sticking the adhesive tape piece 21 by the vertical movement cylinder 41. . Further, the horizontal feed cylinder 42 can be switched and moved between the position where the adhesive tape 21 is received and the position where the adhesive tape 21 is pasted in the left-right direction in FIGS. The vertical movement cylinder 41 and the horizontal feed cylinder 42 are air cylinders in a preferred form and operate quickly.

  On the other hand, in one specific example, the work suction table 5 can sequentially move the liquid crystal display panel (work 3) by a predetermined interval, for example, in the depth direction of FIGS. It is. In this way, the step of sequentially attaching the plurality of ACFs (adhesive tape pieces 21) corresponding to the plurality of drive IC chips to the shelf-like peripheral edge 32 of the liquid crystal display panel (work 3) can be performed smoothly. Further, for example, when the adhesive tape piece 21 is sucked and held on the suction head 4, if the suction tape piece 21 is sucked and held slightly deviated from a predetermined position, the positional deviation is absorbed by fine adjustment of the position of the work suction table 5. It is also possible.

  The tape applicator 10 includes a peeling mechanism for peeling the adhesive tape piece 21 from the support sheet 22 in addition to the adsorption / sticking head 4. In the illustrated example, the peeling mechanism includes a sheet feeding table 6 to which the continuous belt-like support sheet 22 is fed horizontally, and a knife edge 61 provided at an end of the sheet feeding table 6 facing the workpiece suction table 5 side. A sheet feeding mechanism that performs a sheet feeding operation so that the continuous belt-like support sheet 22 bends downward along the knife edge 61; and an air blow nozzle 65 that is provided below the knife edge 61 and performs air blowing upward. Consists of. In the example shown in FIG. 3, the sheet feeding mechanism includes a first sheet feeding motor 73 that rotates and drives a discharge-side drive roll 76 below the sheet feeding table 6, and a sheet supply reel 75 that is above the sheet feeding table 6. And a second sheet feeding motor 74 that rotationally drives. By driving the second sheet feed motor 74 in synchronization with the first sheet feed motor 73, it is possible to prevent an undesired load from being applied to the support sheet 22.

  In the vicinity of the knife edge 61, as shown in FIGS. 2 to 3, the fact that the adhesive tape piece 21 protrudes to a predetermined position outwardly from the knife edge 61 as viewed from the sheet feeding table 6 is optically detected. An adhesive tape piece detection sensor 62 for detection is arranged. That is, when the adhesive tape piece 21 protrudes from the knife edge 61 by a predetermined distance by the sheet feeding operation, air blow by the air blow nozzle 65 and suction by the pulled suction head 4 are simultaneously performed based on detection by the optical sensor 62. .

In the example shown in FIG. 3, the discharge-side drive roll 76 has a driven roller 77 and a pressing mechanism 78 that presses the driven roller 77 against the discharge-side drive roll 76 to perform a reliable feeding action. Is provided. The pressing mechanism 78 is, for example, an air spring and a coil spring connected in series. Further, in the example shown in FIG. 3, the direction change roller 76 is provided in the vicinity of the opposite end of the knife edge 61 in the sheet feeding table 6, and the support sheet 22 fed out from the supply reel 75 is used as the sheet feeding table. 6 so that it slides slightly against 6
As shown in FIGS. 1 to 3, the pasting machine 10 is provided with only one vacuum ejector 1, and the vacuum ejector 1 is provided with only one electromagnetic valve 11. The electromagnetic valve 11 is a vacuum generating electromagnetic valve that controls high-pressure air inflow from the compressor 15 through the high-pressure air introduction pipe 13. The exhaust from the vacuum ejector 1 is connected to an air blow nozzle 65 through a filter 16 and an exhaust pipe 14. On the other hand, the suction port 12 of the vacuum ejector 1 is connected to a first suction pipe 12A and a second suction pipe 12B. The first suction pipe 12 </ b> A is connected to the suction suction port on the upper surface through a pipe in the workpiece suction table 5, and the second suction pipe 12 </ b> B is connected to the suction suction port of the suction head 4.

  With such a piping configuration, when the normally closed solenoid valve 11 is operated, the suction action of the workpiece suction table 5, the suction action of the suction head 4, and the air blow for peeling by the air blow nozzle 65 are simultaneously performed. Become.

  The illustrated affixing machine 10 is provided with a control device 71 composed of a microcomputer, a personal computer, etc., in order to send the support sheet 22 in which the servomotor 72 for horizontally moving the work suction table 5 and the adhesive tape pieces 21 are arranged. The sheet feed motors 73 and 74 are controlled. The work suction table 5 is moved horizontally by the drive control of the control device 7 so that the work 3 sticking position comes to a predetermined sticking operation position, and the sheet feed motors 73 and 74 are driven to continuously support the belt. A feeding operation for the sheet 22 is performed. After detecting that the adhesive tape piece 21 protrudes from the knife edge 61 to a predetermined position by the adhesive tape piece detection sensor 62, the following operations (1) to (5) are sequentially performed. (1) Lowering of the suction head 4 by driving the vertical movement cylinder 41, (2) Start of suction action and air blow by driving the solenoid valve 11, (3) Adsorption head 4 by driving the vertical movement cylinder 41 and the horizontal feed cylinder 42 (4) Lowering of the suction head 4 and sticking of the adhesive tape piece 21 by driving the vertical movement cylinder 41, (5) Stopping suction action and air blow, and returning the suction head 4 to the initial position .

  In the example of the timing chart of FIG. 4, a scale in which the odor to which one adhesive tape piece 21 is attached is divided into about 10 equal parts in time, and the sheet feed motors 73 and 74 are driven only within the first period. Has been.

  Simultaneously with the start of the operation of the sheet feed motors 73 and 74, the operation of the adhesive tape piece detection sensor 62 is started, and it is known by the detection of the adhesive tape piece detection sensor 62 that the adhesive tape piece 21 protrudes to a predetermined position ( At the start point of the second period), the operation of the sheet feed motors 73 and 74 is stopped, and at the same time, the operation of the vertical movement cylinder 41 is started. As a result, the suction head 4 descends from the original height position and descends to a point where it substantially contacts the protruding adhesive tape piece 21. After the descent is completed in this way, the operation of the adhesive tape piece detection sensor 62 is stopped.

  Thereafter, the electromagnetic valve 11 is operated, and the suction action of the suction head 4 and the work suction table 5 and the air blow for peeling from the air blow nozzle 65 are simultaneously started (middle point of the third period). Thereafter, the vertical movement cylinder 41 is operated, and the suction head 4 is raised to the original height position (the middle point of the fourth period). When this rise is completed, the operation of the horizontal feed cylinder 42 is started at the same time (the start point of the fifth period). Simultaneously with the completion of the horizontal feed movement of the suction head 4 (the middle point of the sixth period), the operation of the vertical movement cylinder 41 is started again. In this way, the suction head 4 is lowered, and a sticking operation by the suction head 4 is performed (initial stage of the seventh period). A little later (at the start of the eighth period), the normally closed electromagnetic valve 11 is switched to the OFF state, and the adsorption action and the air blowing action are stopped. After a while, the suction head 4 is raised to the original height position by the operation of the vertical movement cylinder 41, and the horizontal feeding operation starts at the completion of the rise (the middle point of the ninth period). Return to position (end of 10th period).

  Thus, since the suction action for adsorbing the workpiece 3 and the adhesive tape piece 21 and the air blow for peeling are performed only by the control of one electromagnetic valve 11, the control mode becomes simple. Therefore, the software configuration for control can be simplified, the creation cost can be reduced, and the operation reliability can be improved.

  In the above embodiment, the support sheet has been described as sliding on the upper surface of the horizontal sheet feeding table. It may slide along an appropriately curved guide plate or the like. Moreover, although demonstrated as using high pressure air, high pressure gas, such as high pressure nitrogen and high pressure steam, can be used depending on a use.

  In addition, although it has been described that the support sheet is intermittently sent and the adhesive tape piece is peeled off and delivered to the suction head while the sheet feeding operation is stopped, the adhesive tape piece is continuously fed while feeding the support sheet. May be peeled off and delivered. In addition, the strip-shaped adhesive tape piece has been described as being preliminarily mounted on the support sheet, but when the continuous adhesive tape is peeled off by a predetermined size, the adhesive tape is cut to produce an adhesive tape piece. It may be.

  Below, the sticking machine of a comparative example is demonstrated using FIG. In the pasting machine of the comparative example, two vacuum ejectors 1-1 and 1-2 are provided on the workpiece suction table 5 and the suction head 4, respectively. The vacuum ejectors 1-1 and 1-2 are provided with vacuum generating electromagnetic valves 11-1 and 11-2 and vacuum breaking electromagnetic valves 18-1 and 18-2, respectively. Furthermore, a solenoid valve 19 for controlling the ejection of high-pressure air from the air blow nozzle 65 is separately provided.

  Thus, in the configuration of the comparative example, for vacuuming the workpiece 3, the adhesive tape piece 21, and the air blow for peeling the adhesive tape piece 21 from the support sheet 22, two vacuums are used. The ejector 1 and five solenoid valves are required. Therefore, the apparatus cost and required installation space are increased, and the control mechanism is complicated, and the software configuration of the control apparatus and the cost for the control apparatus are increased.

It is a block diagram which shows the structure for the adsorption | suction and air blow in the sticking machine which becomes embodiment of this invention. It is a typical perspective view of the sticking machine which becomes embodiment of this invention. It is a typical side view of the sticking machine which becomes embodiment of this invention. It is a timing chart which shows one specific example of process control for peeling of the adhesive tape piece in the sticking machine which becomes embodiment of this invention, adsorption | suction, and air blowing. It is a block diagram corresponding to Drawing 1 showing the composition for adsorption and air blow in the pasting machine of a comparative example.

Explanation of symbols

1 Vacuum ejector 11 Solenoid valve 12 Suction port
12A, 12B Adsorption pipe 13 High-pressure air introduction pipe 14 Exhaust pipe
15 Compressor 16 Filter 21 Adhesive Tape
22 support sheet 3 work 31 affixing position 32 shelf-shaped peripheral edge 4 suction head 5 work suction table
6 Sheet feeding table 61 Knife edge 62 Adhesive piece detection sensor
65 Air blow nozzle 71 Control device 72 Servo motor 73, 74 Sheet feed motor

Claims (5)

A strip-like adhesive tape piece is separated from a continuous belt-like support sheet, and is a tape attaching device for attaching to a display panel or a drive circuit board for this purpose,
A guide plate for sliding the support sheet;
A sheet feeding drive unit that allows the support sheet to be fed while being bent along the edge of the guide plate;
With the adhesive tape piece partially attached to the support sheet protruding from the edge portion in the direction along the guide plate, the adhesive tape piece is adsorbed and applied to a predetermined position on the display panel or the drive circuit board. A suction head to perform,
When the suction head captures the adhesive tape piece, an air blow nozzle that blows air to urge the adhesive tape piece to peel from the support sheet;
A suction table for sucking and holding the display panel or the drive circuit board ; and
A vacuum ejector in which a decompression pipe for the suction action of the suction head and a decompression pipe for the suction action at the suction table are connected to the suction port, and an exhaust pipe to the air blow nozzle is connected to the exhaust port;
A tape sticking device comprising: a solenoid valve that controls introduction of high-pressure gas into the vacuum ejector.   The tape sticking apparatus according to claim 1, further comprising a sensor for detecting that the adhesive tape piece protrudes from the edge portion to a predetermined position.   The tape applicator according to claim 1 or 2, wherein the guide plate is a horizontally arranged table, and a mechanism for collecting the support sheet is provided below the table. A strip-shaped adhesive tape piece is separated from a continuous belt-like support sheet, and is a method of manufacturing a flat panel display device including a step of attaching to a display panel or a drive circuit board for this purpose,
The support sheet is slid along the front side surface of the guide plate, bent along the edge portion of the guide plate, sent to the back side of the guide plate, and the edge in the direction along the guide plate A step of bringing the suction head into contact with or approaching the adhesive tape piece with the adhesive tape piece protruding from the portion;
Thereafter, the suction action by the suction head, the suction action by the suction table for sucking and holding the display panel or the drive circuit board, and the air blow for promoting the peeling of the adhesive tape are simultaneously performed based on the operation of one electromagnetic valve or its release. A process performed using suction and exhaust of a common vacuum generator;
After sticking the adhesive tape piece to the display panel or the drive circuit board by the suction head, the suction action by the suction head, the suction action by the suction table, and the peeling of the adhesive tape are promoted by operating or releasing the one electromagnetic valve. And a step of simultaneously releasing or stopping the air blow.   5. The optical sensor detects that the adhesive tape piece protrudes from the edge portion to a predetermined position, and based on this detection, the electromagnetic valve is operated or the suction head is moved. A manufacturing method of the flat display device according to the above.

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