JP5096835B2 - ACF pasting device and flat panel display manufacturing device - Google Patents

Description

The present invention, in order to mount the semiconductor circuit elements such as the driver circuit board, ACF application device for kicking attached an ACF (Anisotropic Conductive Film) on the substrate, production equipment of a flat panel display including the ACF application device it relates to.

  One flat panel display is a liquid crystal display. The liquid crystal display is configured by enclosing a liquid crystal between liquid crystal panels composed of two upper and lower transparent substrates. A printed circuit board is connected to the liquid crystal panel via a driver circuit. The inner electrode of the driver circuit is connected to the liquid crystal panel, and the outer electrode is connected to the printed circuit board. The driver circuit mounting method is typically a TAB (Tape Automated Bonding) method or a COG (Chip On Glass) method, but in any case, a wiring pattern is formed on at least two sides of the surface of the liquid crystal panel. The electrodes in this wiring pattern and the electrodes of the driver circuit are electrically connected.

  For electrical connection between the driver circuit and the liquid crystal panel substrate, and between the driver circuit and the printed circuit board, an ACF in which minute conductive particles are uniformly dispersed in an adhesive binder resin is used. By thermocompression bonding the ACF, the electrodes are electrically connected through the conductive particles, and the binder resin is cured by heating, so that the driver circuit is fixed to the liquid crystal panel or the printed circuit board.

  When a driver circuit is mounted on a liquid crystal panel by the TAB method, an ACF is attached to a portion of the liquid crystal panel where a wiring pattern is provided, and a TCP (Tape Carrier Package) as a driver circuit is mounted on the substrate by TAB. Since ACF is an adhesive substance, it is laminated on the backing tape via a release layer, thereby constituting an ACF tape. Therefore, with the ACF tape pressed against the substrate, only the mount tape is peeled off and the ACF is attached to the substrate.

  By the way, if the mount tape is peeled from the ACF tape in a state where the ACF is not securely attached to the substrate, the ACF may be pulled from the mount tape and peeled from the substrate. The ACF is laminated on the release layer of the mount tape, and a certain adhesion force acts between the mount tape and the ACF. When the mount tape is peeled off, the ACF is peeled off from the substrate together with the mount tape. The ACF may peel off due to the action. Further, even when the ACF is not completely peeled off, a part of the ACF is lifted or turned up, resulting in poor ACF sticking as a whole. Therefore, when the ACF tape is heated and pressure-bonded to the substrate, the entire surface of the ACF must be reliably transferred to the substrate side, and only the mount tape must be reliably separated and peeled off.

Patent Document 1 discloses a technique for cooling the interface between the ACF and the substrate in order to increase the adhesive strength between the ACF and the substrate. In Patent Document 1, after the ACF is heated and transferred to the substrate side, the ACF is cooled and attached to the substrate. Since the ACF peels off from the substrate when the ACF is peeled off in a short time without being sufficiently cooled after heating the ACF, the interface strength between the ACF and the substrate is forcibly cooled after the ACF is thermocompression bonded. It is increasing.
Japanese Patent Laid-Open No. 11-242446

  By the way, in patent document 1, in order to affix ACF to a board | substrate reliably, two processes, a heating process and a cooling process, are performed. Accordingly, since two steps are required, the ACF attaching step becomes complicated, and the processing cannot be speeded up. In addition, since each process requires a separate and independent configuration, problems such as a complicated mechanism and high cost are also caused.

  Here, as the ACF, generally, a hot-melt type binder resin is suitably used. The hot-melt type binder resin maintains a high viscosity state (solid or nearly semi-solid state) at room temperature, and is heated to a binder resin to be melted and spreads on the adherend. The binder resin melted and spreads has adhesiveness, and acts to bond the objects together with adhesive force. Therefore, the hot-melt type binder resin exhibits adhesive strength when heated and melted.

  Therefore, when the ACF binder resin is heated to a certain temperature, a certain adhesive force acts and an adhesive force acts between the ACF and the substrate, so that it is exhibited when the binder resin is melted. If the adhesive force to be applied can be made stronger than the force for peeling the mount tape, the ACF can be transferred to the substrate side when the mount tape is peeled. That is, the ACF can be securely attached to the substrate without requiring a special cooling step.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to reliably attach an ACF to a substrate when peeling a mount tape while avoiding complicated processes and mechanisms and an increase in cost.

The ACF adhering device according to claim 1 of the present invention performs an elevating operation to apply pressure to the substrate in order to press-bond the ACF tape holding the ACF to the surface of the substrate via a release layer of the mount tape. A pressure means that acts on the substrate, a substrate receiving means that supports the substrate in a horizontal state by contacting the back surface of the substrate, and a temperature that is higher than the pressure means and at which the ACF is not thermally cured. The receiving side heating means for heating the substrate receiving means, and the pressure side heating means for heating the pressurizing means so that the pressurizing means has a temperature equal to or higher than room temperature. It is said.

  When the ACF is attached to the substrate, the ACF is heated and pressure-bonded in order to heat and melt or at least soften the ACF to improve the adhesion to the substrate. Since the ACF is laminated on the release layer of the mount tape, the adhesion between the ACF and the mount tape is weak. When the ACF is heated and pressure-bonded, the ACF is usually attached to the substrate, and the mount tape Can be peeled off. However, in order to make the attachment of the ACF to the substrate and the peeling from the mount tape more reliable, in the ACF attachment device according to claim 1, the receiving side that heats the substrate receiving means at a temperature higher than the pressurizing means. A heating means is provided. As a result, the temperature of the surface abutting on the substrate (the receiving side abutting surface) is higher than the surface laminated on the ACF mount tape (the pressure side abutting surface: the surface pressed by the pressure means). Thus, a temperature gradient can be provided. Due to this temperature gradient, the adhesive force of the ACF receiving side contact surface can be made higher than the adhesive force of the pressure side contact surface. In addition, since the pressure-side contact surface of the ACF is laminated on the release layer of the mount tape, it is easy to peel off, and the ACF can be reliably transferred to the substrate. And since special processes, such as a cooling process, are not required, the complexity of a process and a mechanism and cost increase can be avoided.

  The temperature of the receiving side heating means needs to be a temperature at which the ACF does not thermoset. Since the ACF bonding step is performed before the driver circuit connection step, when the ACF binder resin is thermally cured at this stage, the conductive particles dispersed therein are covered with the thermally cured binder resin, and the substrate and There is a possibility of not contributing to the electrical connection with the driver circuit. However, the temperature may be any temperature at which the ACF does not thermally cure. For example, when the substrate is heated in a short time, the temperature of the receiving side heating means may be heated to the ACF thermosetting temperature or the vicinity thereof.

Further, the pressure-side heating means heats the pressure means, so that the temperature of the pressure means also increases. When the pressurizing means is in a low temperature state, the heat of the ACF is absorbed by the pressurizing means and the temperature of the ACF is lowered. Further, since the ACF must be rapidly melted in order to speed up the processing, the ACF can be rapidly melted by giving heat to the pressurizing means. However, in order to give a temperature gradient between the pressure-side contact surface and the receiving-side contact surface of the ACF, the pressure-side heating means heats at a temperature that is not so high (preferably a temperature slightly higher than room temperature). Like that.

The ACF bonding apparatus according to claim 2 of the present invention is the ACF bonding apparatus according to claim 1, wherein a plurality of electrode groups are formed on the substrate, and a supply reel for supplying the ACF tape, and the supply reel is fed out. A half-cut means for cutting the ACF tape for each length of the ACF tape attached to each of the electrode groups of the substrate, with the continuity of the ACF tape and the mount tape, The ACF is attached to each electrode group, and the ACF is individually attached to each electrode group of the substrate.

As a method of attaching the ACF to the substrate, batch attachment of attaching the ACF over the entire length of one side of the substrate at a time is the mainstream, but it is divided into individual electrode groups as in the ACF attachment device of claim 2 and individually. In addition, it is possible to perform split pasting in which ACF is pasted. The fine pitch electrodes formed on the substrate constitute a group of a predetermined number of electrodes for each driver circuit, and each electrode group has a blank area between adjacent electrode groups. ing. Since it is not necessary to paste the ACF in the blank area, it is possible to prevent the material from being wasted by adopting the division pasting in which the ACF is not stuck in the unnecessary blank area, and the ACF is configured in the blank area. By exposing the adhesive resin and the conductive particles to be exposed, it is possible to avoid inconvenience for processing and processing after the driver circuit is mounted.

  In the case of split pasting, the backing tape is operated to be pulled up, and the ACF is peeled off from the backing tape. For this reason, when the mount tape is peeled off, the force of the force to peel off from the substrate becomes large on the ACF. For this reason, the backing tape can be peeled off while the ACF is securely attached to the substrate by heating the substrate by the receiving side heating means and strengthening the adhesive force of the receiving side contact surface of the ACF. it can.

The ACF adhering device according to claim 3 of the present invention is the ACF adhering device according to claim 2 , wherein the substrate receiving means is configured to have an attachment length to each electrode group, and the pressurizing means Receiving side elevation driving means for driving the substrate receiving means so as to perform the raising and lowering operation independently in the direction approaching and separating from the pressurizing means. . An ACF adhering device according to claim 4 of the present invention is the ACF adhering device according to claim 2 , wherein the substrate receiving means has a length extending over the entire length of the substrate and is fixed. It was comprised so that it might become.

According to the ACF adhering apparatus of the third aspect , the length of the substrate receiving means is set to one ACF adhering length, and the substrate receiving means is moved up and down. Therefore, a uniform pressure can be applied to almost the entire surface by pressing the ACF by the lifting and lowering operation of both the substrate receiving means and the pressurizing means. Thereby, there exists an effect that it can avoid that a sticking failure arises.

On the other hand, according to the ACF adhering apparatus of the fourth aspect , the length of the substrate receiving means is set to a length extending over the entire length of the substrate, and the substrate receiving means is fixed. For this reason, only the pressurizing means performs the raising / lowering operation, and the substrate receiving means can be kept in contact with the substrate at all times. Therefore, since the substrate is already heated when pressure is applied by the pressurizing means, the temperature of the ACF receiving side contact surface can be quickly brought to a high temperature state. Thereby, efficiency of processing can be achieved. Further, since the substrate and the substrate receiving means are always in contact with each other, the temperature distribution of the substrate can be made uniform. Therefore, stable temperature management can also be performed.

A flat panel display manufacturing apparatus according to a fifth aspect of the present invention includes the ACF sticking apparatus according to any one of the first to fourth aspects . The ACF pasting apparatus can be applied to a flat panel display manufacturing apparatus, and the flat panel display can be applied to a liquid crystal display, a plasma display, an organic EL display, and the like.

  In the present invention, the adhesive force between the substrate and the ACF is increased by heating the substrate by providing the receiving side heating means and heating the receiving side contact surface of the ACF that contacts the substrate. Thereby, ACF can be reliably affixed on a board | substrate at the time of peeling of a mount tape, without requiring a cooling process or a cooling mechanism.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. First, FIG. 1 shows a liquid crystal panel as an example of a substrate to which an ACF is attached, and a driver circuit made of TCP mounted on a substrate as a TAB as an example of a semiconductor circuit device mounted via the ACF. The substrate is not limited to a liquid crystal panel, but can be a substrate for other displays or other various printed circuit boards. The board is not limited to the driver circuit, and the ACF What is necessary is just to be electrically connected via.

  In FIG. 1, reference numeral 1 denotes a liquid crystal panel. The liquid crystal panel 1 is composed of a lower substrate 2 and an upper substrate 3 each made of a glass thin plate, and liquid crystal is sealed between the substrates 2 and 3. The lower substrate 2 protrudes from the upper substrate 3 by a predetermined width on at least two sides, and a plurality of driver circuits 4 in which the integrated circuit elements 4b are mounted on the film substrate 4a are mounted on the protruding portion 2a.

  The projecting portion 2a of the lower substrate 2 is provided with a predetermined number of electrodes connected to wirings respectively connected to TFTs (Thin Film Transistors) formed on the portions where the substrates 2 and 3 are overlapped. These electrodes have a predetermined number of electrodes formed as a group for each mounting portion of the driver circuit 4 as indicated by reference numeral 5 in the drawing. Alignment marks 6 a and 6 a are formed on the left and right sides of each electrode group 5. Therefore, a blank region having a predetermined width is formed between the adjacent electrode groups 5 and 5. On the other hand, the driver circuit 4 is provided with a plurality of electrodes electrically connected to the respective electrodes constituting the electrode group 5, and the electrode group connected to the electrode group 5 is denoted by reference numeral 7. . The driver circuit 4 also has alignment marks 6b and 6b formed on the left and right sides of the electrode group 7. When the driver circuit 4 is mounted on the liquid crystal panel 1, the electrode group 7 is defined with reference to these alignment marks. Position adjustment is performed so that each electrode constituting and each electrode constituting the electrode group 5 coincide.

  The driver circuit 4 is mounted on the liquid crystal panel 1 via the ACF 8. As is well known, the ACF 8 is obtained by dispersing a large number of fine conductive particles in a binder resin having an adhesion function. By heating and pressing the ACF 8 between the driver circuit 4 and the liquid crystal panel 1, the ACF 8 is electrically conductive particles. The driver circuit 4 is fixed to the liquid crystal panel 1 by electrically connecting the electrodes constituting the electrode group 5 and the electrodes constituting the electrode group 7 with the binder resin thermally cured. become. Here, the ACF 8 is divided for each position of the electrode group 5 provided on the projecting portion 2a of the lower substrate 2, and is pasted every length L. As a result, the ACF 8 can be used without waste, and the attached ACF 8 is almost completely covered by the driver circuit 4.

  2 to 4 show a schematic configuration of an attaching mechanism for attaching the ACF 8 to the overhanging portion 2a of the lower substrate 2. FIG. In these drawings, 9 is a support base for holding the liquid crystal panel 1 in a horizontal state. The liquid crystal panel 1 is stably held on the support base 9 by, for example, vacuum suction means. Here, the liquid crystal panel 1 is in contact with the support base 9 over a wide area, but the lower position of the projecting portion 2a of the lower substrate 2 to which the ACF 8 is attached is open. Here, the support base 9 can be provided with position adjusting means in the X, Y, and θ directions for alignment with the driver circuit 4 and the like.

  Reference numeral 10 denotes a unit for attaching the ACF 8 to the liquid crystal panel 1. The attachment unit 10 is composed of a plate body provided in the vertical direction, and a supply reel 11 is detachably attached thereto. The ACF 8 is laminated on the release layer of the mount tape 12 to form an ACF tape 13, and the ACF tape 13 is wound around the supply reel 11. The ACF tape 13 is travel-guided along a travel path composed of rollers 14 to 17 attached to the attaching unit 10. Further, reference numeral 18 denotes a driving roller which is driven so as to sandwich the mount tape 12 after the ACF 8 is attached to the liquid crystal panel 1 and send it to the discharge unit 19.

  The rollers 14 and 15 are guide rollers for the feeder of the ACF tape 13, and the guide roller 15 is attached to the swing arm 20, and the swing arm 20 swings around the rotation shaft 21. Driving means (not shown) such as a motor is connected to the rotating shaft 21. When the swing arm 20 is swung in the direction of arrow F, at least one pasting from the supply reel 11, that is, FIG. The ACF tape 13 having the length L shown in FIG. 6 is fed out and supplied between the rollers 14 and 15. As a result, the reaction force acting when the ACF tape 13 is fed is always constant, and the resistance to the feeding force does not fluctuate due to the difference in the amount of winding of the supply reel 11.

  As shown in FIGS. 5 and 6, the rollers 16 and 17 guide the ACF tape 13 in the horizontal direction in the travel route, and define the length of the ACF 8 to be attached to the liquid crystal panel 1 once. It is a horizontal guide roller. The horizontal guide roller 17 defines the ACF 8 attachment start end position, and the horizontal guide roller 16 defines the ACF 8 attachment end position, and the attachment area of the ACF 8 is set by these. As apparent from FIG. 6, these horizontal guide rollers 16 and 17 are formed with flange portions 16b and 17b on both sides of the cylindrical portions 16a and 17a, and the cylindrical portions 16a and 17a of the flange portions 16b and 17b. The height of the portion protruding from the ACF tape 13 is approximately the same as or slightly larger than the thickness of the mount tape 12 in the ACF tape 13.

  Accordingly, the ACF 8 is attached to the liquid crystal panel 1 between the horizontal guide rollers 16 and 17 and then separated from the mount tape 12. Then, the mount tape 12 from which the ACF 8 has been peeled is collected at a position downstream of the horizontal guide roller 17. A driving roller 18 is provided at a position downstream of the ACF 8 attachment region defined by the horizontal guide rollers 16 and 17. The driving roller 18 includes a driving roller 18a and a pinch roller 18b, and the mount tape 12 is sandwiched between the driving roller 18a and the pinch roller 18b. By rotating the drive roller 18a, the ACF tape 12 is pitch-fed every length L.

  As is apparent from FIG. 3, the affixing unit 10 is mounted on a lift drive unit 22, which is mounted on a longitudinal drive unit 23, and the longitudinal drive unit 23 is a parallel motion that constitutes a conveying means. The drive unit 24 is mounted. By these mechanisms, the ACF 8 attachment region defined by the horizontal guide rollers 16-17 (see FIG. 2) in the route of the ACF tape 13 is moved in the vertical direction, that is, the Z-axis direction, and the horizontal plane in the X-axis direction (electrode It is movable in the direction orthogonal to the arrangement of the groups 5 and the Y-axis direction (the arrangement direction of the electrode groups 5). On the other hand, the liquid crystal panel 1 is fixedly held on the support base 9 by vacuum suction.

  Here, it is necessary to adjust the relative position of the ACF tape 13 between the horizontal guide rollers 16-17 and the electrode group 5 on the lower substrate 2. The parallel movement drive unit 24 moves the pasting region in a direction parallel to the arrangement direction of the electrode groups 5 in the liquid crystal panel 1, that is, in the Y-axis direction. Although the position can be adjusted on the affixing unit 10 side, as described above, when the support base 9 is provided with position adjusting means in the X, Y, and θ directions, the ACF tape 13 is provided on the support base 9 side. Can also be aligned.

  The raising / lowering drive part 22 has the inclination block 30, and the cylinder 31 in order to move this inclination block 30 to the front-back direction. Further, a slide member 32 that engages with the inclined surface of the inclined block 30 is connected to the pasting unit 10, and this slide member 32 has an inclined surface that coincides with the inclined block 30, The structure is such that it cannot be displaced except in the vertical direction. Therefore, by driving the cylinder 31, the attaching unit 10 is displaced in the vertical direction. Here, a motor may be used in place of the cylinder 31.

  Next, the back-and-forth movement drive unit 23 is for moving back and forth the pedestal 34 on which the inclined block 30 is mounted, and the reciprocation of the pedestal 34 is performed by a driving means 35 including a cylinder, a motor and the like. The parallel drive unit 24 has a carriage 34 on which a pedestal 34 and its driving means 35 are mounted. The carriage 36 rotates and drives a ball screw 37 constituting a ball screw feeding means by a motor 38. Thus, the affixing unit 10 can be moved in parallel with the arrangement direction of the electrode group 5 in the liquid crystal panel 1.

  In the travel path of the ACF tape 12 attached to the affixing unit 10, as shown in FIG. 8, half-cut means 40 is provided at a position slightly downstream from the position of the horizontal guide roller 16. The means 40 is attached to the surface of the affixing unit 10 so as to be reciprocally movable in the front-rear direction. As shown in FIG. 7, the half-cut means 40 includes a cutter 41 and a cutter receiver 42. The cutter 41 approaches and separates from the cutter receiver 42 around an axis 43 as indicated by an arrow in the figure. It is possible to turn in the direction to do. In addition, the blade 44 is normally held away from the cutter receiver 42 by the urging force of the spring 44 acting on the cutter 41, and the cutter 41 is pushed in a direction against the spring 44 by the pushing roller 46 provided in the cylinder 45. It is configured to move and oscillate in a direction close to the cutter receiver 42. Then, at the position where the cutter 41 is closest to the cutter receiver 42, an interval that is the same as or slightly shorter than the thickness of the mount tape 12 of the ACF tape 13 is formed therebetween. Thereby, only the ACF 8 is half-cut.

  Further, in order to attach the ACF 8 to the protruding portion 2 a of the lower substrate 2, the ACF tape 13 is pressure-bonded to the surface of the lower substrate 2 with a predetermined pressure at a position between the horizontal guide rollers 16 and 17. For this purpose, the bonding unit 10 is provided with a crimping head 50 as shown in FIGS. 8 and 9. Here, the liquid crystal panel 1 is placed on the support base 9, but the overhanging portion 2 a of the lower substrate 2 protrudes from the support base 9, and the pressure-bonding head 50 detects the protruding portion from above and below. It is the structure which clamps.

  The pressure-bonding head 50 is composed of a pressure blade 51 as a pressure means and a receiving blade 52 as a substrate receiving means. The pressure blade 51 and the receiving blade 52 are attached to elevating blocks 53 and 54, respectively. The elevating blocks 53 and 54 are mounted so as to be vertically displaceable along a pair of guide rails 55 provided in the attaching unit 10. The pressure blade 51 and the receiving blade 52 are arranged above and below the liquid crystal panel 1 and have the same length. The pressure blade 51 is further disposed above the ACF tape 13 that is guided between the horizontal guide rollers 16 and 17 and travels in the horizontal direction. The elevating blocks 53 and 54 are configured to move up and down the common guide rail 55. However, independent guide rails corresponding to the elevating blocks 53 and 54 may be provided.

  The lifting block 54 to which the receiving blade 52 is attached is moved up and down by a predetermined stroke by a cylinder 56. That is, when the cylinder 56 is in the contracted state, the receiving blade 52 descends and is disposed at a lower position away from the liquid crystal panel 1. When the cylinder 56 is extended, the receiving blade 52 is moved to the liquid crystal panel 1. Contact the lower surface. On the other hand, a pressurizing means 57 is connected to the elevating block 53 to which the pressurizing blade 51 is attached. The illustrated pressurizing means 57 has a feed screw 57a driven by a motor, and constitutes a so-called jack. The pressurizing means 57 moves the elevating block 53 connected to the pressurizing blade 51 up and down along the guide rail 55 so that the liquid crystal panel 1 received on the receiving blade 52 is predetermined from above. The pressure is applied. And the pressurization blade 51 and the receiving blade 52 are comprised so that a parallelism may be maintained correctly. In addition, the cylinder 56 that supports the receiving blade 52 is introduced with a pressure that can be held in an extended state without moving excessively by the pressure applied by the pressurizing means 57 at least at the lift stroke end position.

  A pressure side heater 51H as a pressure side heating means and a receiving side heater 52H as a receiving side heating means are incorporated in both the pressure blade 51 and the receiving blade 52 constituting the crimping head 50, respectively. The pressure blade 51 is heated by the heat of the pressure side heater 51H, and the receiving blade 52 is heated by the heat of the reception side heater 52H. The heating temperature of the receiving side heater 52H is set higher than the heating temperature of the pressure side heater 51H. For this reason, the receiving blade 52 is in a higher temperature state than the pressure blade 51. The pressurizing side heater 51H and the receiving side heater 52H are heat sources. For example, power from a power supply source (not shown) is converted into heat energy to generate heat.

  Therefore, the ACF tape 13 is thermocompression bonded to the liquid crystal panel 1 from above and below by the heated pressure blade 51 and the receiving blade 52. The temperature at which the receiving heater 52H is heated is set to a temperature at which the ACF 8 is not thermally cured. Therefore, the temperature is not set so high, but is set to a temperature at which the binder resin of ACF8 melts and exhibits adhesive force (for example, around 140 ° C.). On the other hand, the temperature heated by the pressure-side heater 51H is lower than the temperature heated by the receiving-side heater 52H, and is set to a temperature that does not decrease the temperature of the heated ACF 8 (for example, around 50 ° C.). . The pressure blade 51 and the receiving blade 52 constituting the pressure-bonding head 50 have a width dimension that can sufficiently cover the width of the ACF tape 13, and the dimension in the length direction has at least the attachment length L of the ACF 8. Shall.

  As described above, the attaching unit 10 is provided with the supply reel 11, the travel path of the ACF tape 13 supplied from the supply reel 11, the half-cut means 40, and the crimping head 50. With this ACF attaching device, the ACF 8 necessary for mounting the driver circuit 4 on the TAB is attached to the electrode group 5 formed in a predetermined number on the projecting portion 2 a of the lower substrate 2 of the liquid crystal panel 1.

  Thus, on the support base 9, the liquid crystal panel 1 to which the ACF 8 is attached is disposed in a horizontal state at a predetermined position and held by suction. In this state, on the lower substrate 2 of the liquid crystal panel 1, the projecting portion 2a shown in FIG. 4 protrudes from the support base 9, and a predetermined number of driver circuits 4 are mounted on the projecting portion 2a. For this reason, the affixing unit 10 to which the affixing mechanism is mounted by the ball screw 37 is pitch-fed in the direction of the arrow at every pitch interval P shown in FIG.

  The ACFs 8 corresponding to the length L are sequentially attached to the liquid crystal panel 1. For this purpose, the transport table 36 that constitutes the parallel motion drive unit 24 is driven, and the attaching unit 10 is displaced to a predetermined attaching region. At this time, as shown by the arrows in FIG. 8 and FIG. 9, the sticking unit 10 is held at the raised position by the lift drive unit 22. The pressure blade 51 constituting the pressure-bonding head 50 is held in the raised position, and the receiving blade 52 is held in the lowered position. As a result, the pressure blade 51 and the receiving blade 52 are kept in a non-contact state with the liquid crystal panel 1, and the sticking unit 10 is smoothly moved, and the liquid crystal panel 1 is damaged. There is no. Further, the ACF tape 13 is separated from the liquid crystal panel 1, and even if the half-cut means 40 protrudes forward from the surface of the attaching unit 10, it does not interfere with the liquid crystal panel 1. Accordingly, the ACF tape 13 is half-cut. By performing this half-cutting, the half-cut position of the ACF tape 13 becomes the pasting end position, and the end where the previous ACF 8 was pasted is the pasting start end position. That is, the horizontal guide roller 17 is disposed at the application start position, and the horizontal guide roller 16 is disposed at the application end position.

  Thereafter, after the half-cut means 40 is retracted, as shown by the arrows in FIGS. 10 and 11, the attaching unit 10 is lowered by the elevating drive unit 22, and the horizontal guide roller 16, of the ACF tape 13, The part between 17 is arranged at a position close to the surface of the lower substrate 2 of the liquid crystal panel 1. Thereafter, the cylinder 56 is operated to raise the elevating block 54 and bring the receiving blade 52 into contact with the back surface of the liquid crystal panel 1 as shown in FIGS. When the receiving blade 52 is brought into contact with the back surface of the liquid crystal panel 1, the receiving blade 52 is heated by the receiving heater 52H. Therefore, when the receiving blade 52 is brought into contact with the lower substrate 2, it is made of a thin glass plate. The lower substrate 2 is heated to a high temperature state.

  Here, the receiving blade 52 does not extend over the entire length of the liquid crystal panel 1 but is limited to a position corresponding to a region where the ACF 8 is attached by one operation. Next, as shown by the arrows in FIGS. 14 and 15, the pressing means 57 is operated to lower the pressing blade 51 and push the mount tape 12 of the ACF tape 13, whereby the ACF 8 is Crimp to the lower substrate 2.

  When the pressure blade 51 pushes the ACF tape 13, the pressure blade 51 and the ACF tape 13 are in contact with each other, but the pressure blade 51 is heated to a certain extent by being heated by the pressure side heater 51H. Therefore, heat is also transmitted to the release layer of the mount tape 12. Depending on the type of the mount tape 12, the ACF 8 may be easily peeled from the release layer of the mount tape 12 by applying heat to the release layer. For this reason, heat is applied to the release layer of the mount tape 12, and the adhesive force between the ACF 8 and the mount tape 12 is weakened so that it can be easily peeled off.

  In this state, the ACF tape 13 is pressed against the lower substrate 2 by the pressure blade 51. Since the lower substrate 2 is in a high temperature state due to the heating of the receiving side heater 52H, heat is transmitted to the ACF 8 and starts to melt. At this time, since the ACF 8 is a thin film and has a predetermined thickness, the ACF 8 is gradually melted from the receiving-side contact surface of the ACF 8 (the contact surface with the lower substrate 2 of the ACF 8). At a high temperature, a temperature gradient is generated at which the pressure side contact surface side (the surface laminated on the mount tape 12 of the ACF 8) becomes a lower temperature. As this surface is melted, the viscosity of the binder resin decreases, and the surface of the lower substrate 2 wets and spreads while exhibiting adhesive strength. If it does so, adhesive force will act between ACF8 and the lower board | substrate 2, and both will be in a contact | adherence state.

  On the other hand, since the pressure blade 51 is also heated by the pressure side heater 51H, heat is also transmitted to the pressure side contact surface of the ACF 8. However, since the pressure-side heater 51H heats at a low temperature so as not to lower the temperature of the ACF 8, even if heat is transmitted to the pressure-side contact surface of the ACF 8, this surface does not melt so much. Accordingly, the adhesive force acting between the ACF 8 and the mount tape 12 is small. Conversely, heating the release layer facilitates easy peeling.

  In order to apply a predetermined pressing force to the liquid crystal panel 1 by the pressing blade 51, a feed screw 57a constituting the pressing means 57 is driven. Here, the lower substrate 2 of the liquid crystal panel 1 is made of a thin glass plate, is allowed to be deformed to some extent, and has the same length and the pressure blade 51 and the receiving blade that are accurately maintained in parallelism. 52. Therefore, at the time of clamping, the portion of the liquid crystal panel 1 to be clamped follows the pressure-bonding head 50 composed of the pressure blade 51 and the receiving blade 52. Since the pressure blade 51 and the receiving blade 52 are substantially limited to the portion from the starting end position of the ACF tape 13 to the end position, the ACF tape 13 is in contact with the pressure blade 51. A uniform pressing force is applied to the entire portion, and no pressing force is applied to the base end side of the half-cut pasting end position where the ACF 8 exists.

  When the ACF 8 is pressure bonded to the lower substrate 2, the pressure applied to the ACF tape 13 by the pressure bonding head 50 is released. Next, the cylinder 56 is driven to displace the receiving blade 52 to the lowered position. Thereafter, the elevation drive unit 22 is raised. At this time, as shown by the arrows in FIG. 16, the longitudinal drive unit 23 is driven together with the elevation drive unit 22, and is inclined with respect to the width direction of the ACF tape 12. When operated so as to be pulled upward, the mount tape 12 is peeled off from the ACF 8.

  When the ACF 8 is divided and pasted, the ACF 8 is peeled off so that the ACF 8 is scraped off. Therefore, the ACF 8 is dragged by the mount tape 12 to be peeled from the lower substrate 2 (with the mount tape 12 pulled up obliquely upward). Force) acts greatly. However, as the state of the ACF 8 at this time, the receiving-side contact surface is in close contact with the lower substrate 2 by the adhesive force, and the pressure-side contact surface is in a state that is easily peeled off from the mount tape 12, The ACF 8 is surely attached to the lower substrate 2.

  As described above, the attachment of the ACF 8 to the one electrode group 5 in the projecting portion 2a of the lower substrate 2 is completed. The affixing unit 10 is held in the raised position, the driving roller 18 is operated, and the ACF tape 13 is pulled out from the supply reel 11 and fed by one pitch. Then, the translation drive unit 24 is operated to move the pasting unit 10 by one pitch, that is, by the amount indicated by the interval P in FIG. And the board | substrate support stand 9 holding the liquid crystal panel 1 does not move. In this state, the ACF 8 is sequentially attached to the electrode group 5 by repeating the same operation as described above.

  Here, as the pressure blade 51 and the receiving blade 52, those which are driven up and down by elevating blocks 53 and 54, respectively, are employed. Accordingly, the elevating blocks 53 and 54 move up and down along the guide rail 55 provided in the attaching unit 10 so that the pressure blade 51 and the receiving blade 52 always maintain parallelism accurately and the lower substrate 2. From above and below. When n electrode groups 5 are formed on the liquid crystal panel 1, the distance (n · P) is separated from the first ACF 8 attachment position to the final ACF 8 attachment position, but all have substantially the same conditions. ACF8 is pressure-bonded. Accordingly, ACFs 8 can be attached to all electrode groups 5 with an equal applied pressure even with a large liquid crystal panel 1 as well as with a small size, and no crimping failure occurs. In addition, although both the raising / lowering blocks 53 and 54 are made to guide the same guide rail 55, it is not necessary to share the guide rail 55 necessarily.

  On the other hand, as shown in FIG. 17, the receiving blade 152 is attached to the support base 9, and the receiving blade 152 is disposed at the same height position as the support base 9, and has a length extending over the entire length of the lower substrate 2. It can also be configured. And the receiving side heater 152H is provided so that the full length of the receiving blade 152 may be covered. In this case, while the liquid crystal panel 1 is placed on the support base 9, the liquid crystal panel 1 is always heated, and only the pressure blade 51 moves up and down. By configuring the receiving blade 152 in this way, stable temperature management and rapid processing can be achieved.

  In other words, since the receiving blade 152 is fixed, the lower substrate 2 can be kept in contact with the receiving blade 152 at all times. Since the receiving blade 152 is heated by the receiving heater 152H, the lower substrate 2 always in contact with the receiving blade 152 is also always heated. In addition, since the receiving blade 152 has a length extending over the entire length of the lower substrate 2, the portion of the lower substrate 2 where the electrode group 5 is formed is heated with a uniform temperature distribution over the entire length. . For this reason, stable temperature management becomes possible. In addition, since the lower substrate 2 is always heated, it does not require time for heating the lower substrate 2. Therefore, since the ACF 8 can be pasted quickly, it contributes to speeding up the process. Therefore, it is possible to arbitrarily select whether the receiving blade 152 is set to be moved up and down or set to a fixed state depending on the purpose.

  In the above description, the mechanism for dividing and pasting the ACF has been described. However, the present invention can also be applied to a mechanism for performing batch pasting. In the case of divisional pasting, the dimension of the ACF is set to the length of the pasting for each electrode group, but in the case of batch pasting, the dimension extends to the entire length of the lower substrate. Even in the case of batch attachment, since it is necessary to peel off the ACF from the mount tape, a force to peel from the lower substrate acts on the ACF when the mount tape is peeled off. Therefore, if the lower substrate is heated by the receiving heater so that an adhesive force acts between the lower substrate and the ACF to bring them into close contact with each other, the ACF can be attached even in the case of batch bonding. The mount tape can be peeled in a state where it is securely attached to the lower substrate.

It is a principal part top view which shows the liquid crystal cell as a board | substrate with which ACF is affixed, and the driver circuit mounted in this board | substrate. It is a front view which shows schematic structure of an ACF sticking machine. FIG. 3 is a left side view of FIG. 2. FIG. 3 is a plan view of FIG. 2. It is a structure explanatory drawing of a horizontal feed roller. It is a side view which shows the structure of a horizontal feed roller. It is a structure explanatory view of a cutter unit. It is a principal part enlarged front view of the ACF sticking machine which shows the half cut state of an ACF tape. FIG. 9 is a left side view of FIG. 8. It is a principal part enlarged front view of the ACF sticking machine which shows the descent state of a sticking unit. It is a left view of FIG. It is a principal part enlarged front view of the ACF sticking machine which shows the raising state of a receiving blade. FIG. 13 is a left side view of FIG. 12. It is a principal part enlarged front view of the ACF sticking machine which shows the crimping | compression-bonding state of an ACF tape. It is a left view of FIG. It is explanatory drawing which shows the state which has peeled the mount tape of an ACF tape. It is explanatory drawing which shows the other example of a receiving blade.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Liquid crystal panel 2 Lower board 3 Upper board 4 Driver circuit 5 Electrode group 8 ACF
40 Half-cutting means 41 Cutter 50 Crimping head 51 Pressure blade 51H Pressure heater 51 Receiving blade 52H Receiving heater 53 Lift block 54 Lift block

Claims (5)

A pressurizing means for applying a pressure to the substrate by moving up and down in order to press-bond the ACF tape holding the ACF to the surface of the substrate through a release layer of the mount tape;
Substrate receiving means for contacting the back surface of the substrate and supporting the substrate in a horizontal state;
Receiving side heating means for heating the substrate receiving means so that the temperature is higher than the pressurizing means and the ACF does not thermoset;
A pressure-side heating means for heating the pressure means so that the pressure means becomes a temperature equal to or higher than room temperature;
ACF pasting apparatus having A plurality of electrode groups are formed on the substrate,
The supply reel that supplies the ACF tape and the ACF tape that is fed from the supply reel are made continuous with the backing tape, and the ACF is cut for each length of attachment to each electrode group of the substrate. Half-cut means,
The pressurizing means is configured to have the length of the ACF attached to each electrode group,
The ACF adhering apparatus according to claim 1, wherein the ACF is individually attached to each electrode group of the substrate. The substrate receiving means is configured to have a length for pasting to each electrode group,
A receiving side elevating drive means for driving the substrate receiving means so as to be moved up and down independently in a direction approaching and separating from the pressurizing means so as to face the pressurizing means; The ACF sticking apparatus according to claim 2 . 3. The ACF adhering apparatus according to claim 2 , wherein the substrate receiving means is configured to have a length extending over the entire length of the substrate so as to be in a fixed state. The flat panel display manufacturing apparatus which has an ACF sticking apparatus of any one of Claims 1 thru | or 4 .

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