JP2921386B2 - Tape sticking device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for attaching a tape member made of an anisotropic conductive sheet on an electrode provided on a transparent substrate constituting a liquid crystal in a process of manufacturing the liquid crystal. .

[0002]

2. Description of the Related Art In the production of a liquid crystal constituting a liquid crystal display, an electrode provided on a transparent substrate constituting the liquid crystal display has T electrodes.
AB is connected, an anisotropic conductive sheet is used to connect the TAB , and the anisotropic conductive sheet has an adhesive surface on both sides, which is adhered to a transparent substrate, and the TAB is To paste.

[0003]

Here, in attaching the anisotropic conductive sheet to the transparent substrate, the anisotropic conductive sheet must be attached with a predetermined tension. If the tension is insufficient, there is a problem that a wrinkle is generated at the time of sticking or a bubble is generated, resulting in poor contact with the electrode of the transparent substrate. On the other hand, if the tension is too large, the anisotropic conductive sheet will be stretched, so that the density of the conductive powder will change and poor contact may occur.

[0004] The present invention has been made in view of the above points, and an object of the present invention is to provide an anisotropic conductive sheet having an appropriate tension and smoothly affix it to a transparent substrate. Is to be able to do it.

[0005]

In order to achieve the above-mentioned object, an apparatus of the present invention comprises an anisotropic conductive sheet having both sides having an adhesive surface, and a backing sheet, and one side having an adhesive surface. A feed roller for pulling out the resulting tape member from the supply reel and attaching the tape member to a transparent substrate constituting liquid crystal with a sticking roller, and for sucking and extracting the mount side of the tape member from the supply reel. In order to stock the tape member of a predetermined length sent from the feed roller , the upper end is opened and slightly wider than the width of the tape member.
It has a stock space with a wide width,
A stocking portion for accommodating a tape member of a predetermined length from above and a suction force generated by a negative pressure from below the stock space.
Tensioning means for applying a predetermined tension to the tape member in the stock part by causing the tape member to chuck, a chuck means for chucking the tip of the tape member sent out from the stock part, and the tape member being moved upstream of the chuck means in the flow direction. And a sticking means for sticking the tape member on the transparent substrate by pressing the tape member on the surface of the transparent substrate at the side position.

[0006]

[Function] The anisotropic conductive sheet has adhesive surfaces on both sides, but when it is attached to a transparent substrate, a backing sheet is attached on one side, and the opposite side is A tape member is formed as an adhesive surface, and the adhesive surface side is attached to a transparent substrate. The tape member is supplied from a supply reel, and the supplied tape member is first sent to a stock unit.
If a very strong force is applied to the tape member during feeding into the stock portion, the sheet is stretched. Also, when feeding the sheet into the stock section, the adhesive surface must not be touched. From the above, by using a feed roller that attracts the mount side by negative pressure and winding it around the feed roller by a predetermined angle, it is possible to exert a sufficient feed force only by applying a weak force to the tape member. Become.

In applying the tape member, it is necessary to hold the tape member at a predetermined tension. In order to generate this tension, a tension applying means is provided in the stock portion, and the feeding by the feed roller is performed. Completely separate to generate the required tension in the stock section.

The tape member is pulled out of the stock portion by the chuck means. The tape member is held at a predetermined tension by the tension applying means. In this state, the tape member is pressed against the transparent substrate with a predetermined pressing force by displacing the attaching roller constituting the attaching means in the direction of the transparent substrate. Then, the sticking roller can be rolled by relatively moving between the sticking roller and the transparent substrate, and the sticking roller can be stuck to the transparent substrate by the pressing force acting on the tape member at that time. Thus, by sticking the tape member in a state having a proper tension, wrinkles, bubbles, and the like do not occur. In particular, even when air is interposed between the tape member and the transparent substrate, the bonding roller is formed of an elastic member having an arcuate surface whose outer peripheral surface has a convex central shape. Since the central portion in the width direction comes into contact with the transparent substrate first, and then spreads out from the central portion to the left and right sides, no air bubbles are contained between them.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. First, in FIG. 1, reference numeral 1 denotes a transparent substrate constituting a liquid crystal, and an electrode 1a is provided outside the display area on the surface of the transparent substrate 1, and both surfaces of the electrode 1a have an adhesive surface. The anisotropic conductive sheet 2 is adhered. Then, the electronic component 3a is further mounted on the anisotropic conductive sheet 2, and the TAB 3 on which the required wiring pattern is formed is superimposed, and a predetermined pressing force is applied to the TAB 3. Electrode 1a and TAB 3
The electrode 3b on the side is electrically connected via the anisotropic conductive sheet 2. In the mounting process of the TAB 3, the anisotropic conductive sheet 2 is first adhered to a predetermined position of the transparent substrate 1. This tape member 5 is adhered to the transparent substrate 1 by using the tape member 5 in a state where the substrates 4 are bonded together.

For this purpose, a tape sticking device shown in FIG. 2 is used. In the figure, reference numeral 10 denotes a supply reel for the tape member 5. The tape member 5 supplied from the supply reel 10 is wound around a feed roller 12 by a pair of guide rollers 11a and 11b at a predetermined angle. Is rotationally driven to be fed into the stock unit 14 via the guide roller 13. The tape member 5 having a predetermined length is stocked in the stock portion 14. The tape member 5 thus stocked is sent out from the stock portion 14 via the guide roller 15. ing. One or a plurality of guide rollers 16 are arranged on the downstream side.
On the downstream side of 6, a static elimination roller 17 is provided. The guide roller 1 is located downstream of the neutralizing roller 17.
8, 19 are provided.

The tape member 5 sent out from the guide roller 19 has its tip end chucked by the chucking means 20 and is pulled out by a predetermined length. A sticking roller 21 is provided at a position where the tape member 5 is pulled out, and the sticking roller 21 rolls while pressing the tape member 5 on the transparent substrate 1 so that the tape member 5 rolls. 5 is attached to the transparent substrate 1. Further, in the drawing, reference numeral 22 denotes a cutter member, and reference numeral 23 denotes a holding member of the tape member 5.

The feed roller 12 feeds out the tape member 5 from the supply reel 10. However, the back tension varies depending on the winding diameter of the tape member 5 on the supply reel 10, and the like.
In this embodiment, the tape member 5 is drawn out of the supply reel 10 without any extension, and the function of feeding the tape member 5 to the stock unit 14 is exhibited. For this reason, the delivery roller 12 has the configuration shown in FIGS.

In the drawing, reference numeral 30 denotes a rotating wheel. The rotating wheel 30 includes a cup 30a and a shaft 3
0b, a large number of suction holes 31 penetrating in the thickness direction of the cup portion 30a are formed at predetermined pitch intervals. A gear 32 is fixedly provided on a shaft portion 30 b connected to the cup portion 30 a, and the gear 32 meshes with a drive gear 34 of a motor 33. Rotating wheel 3
The fixed body 35 is inserted through 0. This fixed body 35
Is composed of a circular portion 35a and a rod portion 35b. The circular portion 35a is in sliding contact with the inner surface of the cup portion 30a, and the rod portion 35b is inserted into the shaft portion 30b. here,
The circular portion 35a of the fixed body 35 has a groove-shaped passage 36 formed at a predetermined angle on the outer peripheral surface thereof, which is approximately 270 ° in the drawing, and a suction passage 37 is formed in the rod portion 35b.
Are drilled. A plurality of communication passages 38 are provided radially from the suction passage 37, and these communication passages 38 are open to the passage 36. The suction passage 37 is connected to a negative pressure source (not shown), so that the suction hole 31 provided in the rotating wheel 30 generates a suction force due to the negative pressure when the suction hole 31 communicates with the passage 36 during the rotation. .

The guide rollers 11a and 11b are used to wind the tape member 5 around the feed roller 12 at a predetermined angle, so that the tape member 5 has an angle slightly larger than the angle at which the mount 4 forms the passage 36. Is wound around the feed roller 12 and is sucked and held by the suction hole 31. When the rotating wheel 30 of the feed roller 12 is rotated in this state,
The tape member 5 can be pulled out from the supply reel 10. In this manner, the tape member 5 is attracted and held by the feed roller 12 over a large angle, so that the tape member 5 can be pulled out without applying a strong force partially, and there is no possibility that the tape member 5 is stretched at the time of drawing.

The stock section 14 is for stocking a predetermined length of the tape member 5 pulled out from the supply reel 10 by the feed roller 12, and has a configuration shown in FIGS. I have. In the figure, 40 is a base plate, 41 and 41 are guide posts, 42 is transparent glass, and 43 is a glass pressing plate. A step is provided on the surface of the base plate 40, and the raised portion becomes the tape guide surface portion 40a. The pair of guide posts 41 are provided so as to sandwich the tape guide surface portion 40a. Further, the guide column 41 is provided with a step portion 41a, and a transparent glass 42 is incorporated so as to abut the step portion 41a, so that the inside can be viewed through the transparent glass 42. This transparent glass 42
The stock part 14 is assembled by interposing a spring 44 between the glass holding plate 43 and the base plate 40 by screwing the screw 45 from the glass holding plate 43 through the guide post 41. The upper part of the stock part 14 is open, the side part is closed by a guide column 41, and the lower part is closed by a ridge 40b provided at the lower end of the tape guide surface part 40a of the base plate 40. A space 14a is formed. The width of the stock space 14 a is slightly wider than the width of the tape member 5, and has a depth capable of stocking several times the length of the tape member 5 attached to the transparent substrate 1.

The tape member 5 is drawn into the stock portion 14 at a position between the guide rollers 13 and 15. In order to apply this retraction force, the base plate 4
A suction passage 46 is opened at a position below the portion where the zero ridge 40b is formed, and a plurality of communication holes 47 are formed in the ridge 40b. A suction force for drawing the member 5 into the stock space 14a of the stock portion 14 is generated.
Stock space 1 formed by guide posts 41, 41
By making the width of 4a slightly larger than the width of the tape member 5, the suction passage 46 is connected to a negative pressure source, and the suction passage 46 is connected to the stock space 14a through the communication hole 47.
When the tape member 5 is in a negative pressure state, the tape member 5 becomes substantially circular and comes into contact with the guide post 41. Therefore, the tape member 5 becomes a movable partition wall, and the lower portion of the tape member 5 is suctioned by the negative pressure. It is held in a state having a predetermined tension by a force. The suction passage 46 and the communication hole 47 form a tension applying unit that applies a constant tension on the downstream side in the feeding direction of the tape member 5. Since the adhesive surface of the tape member 5 faces the guide column 41, the interval between the guide rollers 13, 15 is made smaller than the length of the upper end opening of the stock portion 14 in the length direction. The contact portion of the tape member 5 with the guide post 41 comes in contact with the area as small as possible below the stock space 14a.

The stock space 14 in the stock section 14
The tape member 5 that has been drawn in and stocked is passed through the guide roller 16 and reaches the neutralizing roller 17, as shown by the arrow in FIG. Furthermore, this static elimination roller 1
7 is set to the ground potential so that the charged tape member 5 is discharged on the path up to that point.

The tape member 5 running through the charge removing roller 17 is turned by a guide roller 18 and further wound around a guide roller 19, and its free end is a chuck means 2.
It is designed to be chucked by 0. The tape member 5 is pulled out by the chuck means 20 by the length of the tape member 5 attached to the transparent substrate 1. For this purpose, as shown in FIG. 8, the chuck means 20 is composed of a roller 50 and a movable plate 51, and the movable plate 51 is displaced by the air cylinder 52 in a direction approaching or separating from the roller 50. ing. The chuck means 20 is provided with the roller 5
0 and the tape member 5 is chucked between the movable plate 51 and
In the direction parallel to the transparent substrate 1, the transparent substrate 1 can be moved by an interval corresponding to one sticking length. For this purpose, the chuck means 20 is mounted on a slide block 53, and the slide block 53 is slidable by a forward / reverse rotation motor (not shown). As described above, by using the roller 50 for the chucking means 20, when the tape member 5 is attached to the transparent substrate 1, the leading end portion of the tape member 5 can be easily separated from the chucking means 20.

The chucking means 20 chucks
The sticking roller 21 is used as a sticking unit for sticking the tape member 5 pulled out by a length corresponding to the sticking length to the transparent substrate 1 on the surface of the transparent substrate 1 .
Can be. As shown in FIG. 9, the attaching roller 21 has a support shaft 60 supported so as to be vertically displaceable, and the support shaft 60 is provided with a roller 62 made of conductive rubber via a bearing 61. Mated. This roller 62
The cross-sectional shape is an arc surface 62a having a convex center. With this configuration, the tape member 5 is configured such that the most protruding central portion of the arc surface 62a of the roller 62 of the sticking roller 21 first comes into contact with the tape member 5 so that the tape member 5 can be spread right and left by the pressing force. Will come in contact. As a result, even if air is interposed between the tape member 5 and the transparent substrate 1, this air moves in the width direction of the tape member 5 and is discharged from the side, and air bubbles and the like are generated. Affixed without including.

As described above, the tape member 5 is adhered to the transparent substrate 1, but the end of the tape member 5 must be cut. For this purpose, a cutter 22 composed of an upper blade 22a and a lower blade 22b is provided at a position in front of the guide roller 19, and the tape member 5 is cut between the cutter 22 and the guide roller 19. Later, in order to hold the free end, a holding member 23 including a pair of clampers 23a and 23b approaching and separating from each other is provided. The holding member 23 is separated from the cutter 22 by a predetermined distance, and the distance between the holding member 23 and the roller 50 and the movable plate 51
This is to allow an extra length to be able to clamp between them.

The transparent substrate 1 is mounted on a transfer table 72 mounted on a ball screw feed mechanism 70 via a position fine adjustment mechanism 71, for example. First, the position fine adjustment mechanism 71 is driven, for example, by recognizing the alignment mark 1b provided on the transparent substrate 1 using, for example, an image recognizing means to perform fine position adjustment in the XY directions (and the rotation direction). Then, the adhesive surface of the anisotropic conductive sheet 2 constituting the tape member 5 is adhered to a predetermined position using the tape adhering device while the transport table 72 is moved by the ball screw feed mechanism 70.

In the tape adhering device, the tape member 5 is supplied from the supply reel 10 to the guide rollers 11a and 11b in advance.
The guide roller 13 is wound around the feed roller 12 by a predetermined angle.
The guide roller 15, the guide roller 16,
The wire is guided so as to be guided by the guide rollers 18 and 19 via the charge removing roller 17, and its free end is chucked by the chuck means 20. And chuck means 2
Reference numeral 0 denotes a position where the tape member 5 is pulled out from the guide roller 19 by the length of the tape member 5 attached to the transparent substrate 1.

Then, when the transparent substrate 1 is placed at a predetermined position, the attaching roller 21 is lowered to bring the tape member 5 into contact with the transparent substrate 1, and a predetermined pressing force is applied by the attaching roller 21. Add. Thereby, the attaching roller 21 rolls, and the tape member 5 is attached on the transparent substrate 1. In this state, the transparent substrate 1 is first placed in FIG.
Is moved to the left, and the tape member 5 is released from the chucking of the tape member 5 by the chucking means 20, so that the portion up to the free end of the tape member 5 is attached to the transparent substrate 1 and then moved to the right. , Transparent substrate 1
The tape member 5 is stuck on the whole. Then, the transparent substrate 1 is once stopped at a position immediately before the tape member 5 is completely stuck. In this state, the cutter member 22 is operated to cut the tape member 5, and the holding member 23 cuts the tape member 5 into a free state, and clamps the vicinity of the end of the tape member 5 to be next stuck. After that, the transparent substrate 1 is moved again so that the tape member 5 is completely adhered to the transparent substrate 1.

When the attachment of the tape member 5 is completed as described above, the upper blade 22a and the lower blade 22b constituting the cutter member 22 are separated from each other, and the attaching roller 21 is raised. In this state, the chuck means 20 is brought close to the holding member 23, and the free end of the tape member 5 held by the holding member 23 is chucked. Then, the operation for attaching the tape member 5 to the next transparent substrate 1 can be started by releasing the clamping of the tape member 5 by the holding member 23 and returning the chuck means 20 to the original position. State.

By the way, when the tape member 5 is adhered to the transparent substrate 1, it is necessary to hold the tape member 5 with a certain tension in order to prevent wrinkles and the like. However, if the tension is too high, the anisotropic conductive sheet 2 is elongated, and the density of the conductive powder uniformly dispersed in the anisotropic conductive sheet 2 changes. For this purpose, the guide roller 19 of the tape member 5 is moved
It is necessary to keep the portion between zero and a predetermined tension state. Therefore, the stock space 14 of the stock unit 14
a is divided into two upper and lower space portions by a tape member 5, and the lower space portion is in a negative pressure state by a suction passage 37 as tension applying means. Accordingly, the tape member 5 is moved by the suction force to the stock portion 1.
4, a force acts in the direction of being drawn into, and an appropriate tension can be generated, so that the anisotropic conductive sheet 2 does not expand at the time of sticking, and the entire surface is securely formed. Contact with the transparent substrate 1 can reliably prevent the occurrence of situations such as wrinkles and bubbles.

The stock portion 14 is stocked for the length of the tape member 5 to which the tape member 5 is adhered a plurality of times.
I try to draw out. If an excessive force is applied to the tape member 5 at the time of drawing by the feed roller 12,
Again, elongation will occur. Further, since the tape member 5 is pulled, it is not preferable that the tape member 5 is brought into contact with the adhesive surface of the tape member 5 because the adhesive substance adheres to the surface of the feed roller 12. However, the delivery roller 12 exerts a suction force by the negative pressure on the mount 4 side of the tape member 5 to hold the adhesive surface side in a non-contact state. , The tape member 5 can be pulled out smoothly, and no elongation occurs during that time. Here, the load on the tape member 5 can be further reduced by making the outer diameter of the feed roller 12 considerably larger than the outer diameter of the gear 32.

While the tape member 5 is running, the tape member 5 slides with other members at various places, and thus is charged with static electricity. Since the ion wind is supplied and the neutralizing roller 17 is interposed, most of the static electricity is removed at a stage before the application. However, when the tape member 5 is stuck to the transparent substrate 1, the sticking roller 21 rolls on the tape member 5, so that there is a possibility that static electricity may be applied even at this stage. But sticking roller 2
The roller 62 constituting 1 is made of a conductive member and has a ground potential, so that static electricity is almost completely eliminated.

Further, the tape is adhered to the transparent substrate 1 by applying a pressing force to the tape member 5 by the attaching roller 21. The attaching roller 21 is made of elastic rubber. Since the central portion has the arc surface 62a formed in the most protruding arc shape, the portion where the attaching roller 21 first comes into contact with the tape member 5 is the most protruding portion in the arc surface 62a, As the force increases, the contact portion spreads right and left in the width direction. Therefore, even if air is interposed between the tape member 5 and the transparent substrate 1, the pressing force causes the air to be pushed out to the left and right sides of the tape member 5 and to be discharged. As a result, there is no inconvenience that bubbles or the like are generated when the tape member 5 is attached.

[0029]

As described above, according to the present invention, the tape member pulled out from the supply reel by the feed roller is stocked in a stock portion of a predetermined length, and the stock portion is provided with tension applying means. Due to stock sky
Negative pressure from below against the tape member located within
A predetermined tension is applied to the tape member so as to exert a suction force, and the tape member sent out from the stock portion is placed at a position on the upstream side of the chuck means in the flow direction , and the transparent substrate is adhered by the attaching means . Since the tape member is pressed on the surface, and the tape member is stuck on the transparent substrate, elongation occurs in the entire travel path of the tape member.
No extra tension is applied, and
Transparent substrate by negative pressure suction at the stock part of the loop member
Apply a certain amount of tension to the extent that no wrinkles
Thus, the tape member can be smoothly and accurately attached to the tape member.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a step of mounting a TAB on a transparent substrate.

FIG. 2 is an overall configuration diagram of the tape attaching device.

FIG. 3 is an exploded perspective view of a delivery roller.

FIG. 4 is a cross-sectional view of an assembled state of a delivery roller.

FIG. 5 is an exploded perspective view showing a configuration of a stock unit.

FIG. 6 is a longitudinal sectional view of a stock unit.

FIG. 7 is a cross-sectional view of a stock unit.

FIG. 8 is an explanatory diagram of a configuration of chuck means.

FIG. 9 is a sectional view of a sticking roller.

DESCRIPTION OF SYMBOLS 1 Transparent substrate 2 Anisotropic conductive sheet 4 Backing paper 5 Tape member 10 Supply reel 12 Delivery roller 14 Stock unit 20 Chuck means 21 Adhering roller 22 Cutter member 30 Rotating wheel 31 Suction hole 35 Fixed body 36 Passage 37 Suction passage 38 Communication passage 40 Base plate 41 Guide post 42 Transparent glass 43 Glass holding plate 46 Suction passage 47 Communication hole 60 Support shaft 62 Roller 62a Arc surface 70 Ball screw feed mechanism 72 Carrier

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Kunio Aburada Hitachi Electronics Engineering Co., Ltd. 2-6-1 Otemachi, Chiyoda-ku, Tokyo (56) References JP-A-4-129962 (JP, A) Hei 5-246609 (JP, A) (58) Field surveyed (Int. Cl. ⁶ , DB name) B65H 35/07, 41/00

Claims (6)

(57) [Claims] 1. An adhesive sheet having a sticky surface on both sides and an adhesive sheet, and a tape member having a sticky surface on one side is pulled out from a supply reel, and a liquid crystal is formed by a sticking roller. It is those for adhering the transparent substrate, a feed roller for drawing from said supply reel to adsorb mount side of the tape member, in order to stock the tape member having a predetermined length fed from the feed roller To
The upper end is open and has a width slightly wider than the width of the tape member.
Has a stock space that has
And a suction part by a negative pressure from below the stock space for accommodating a tape member of a predetermined length.
Tensioning means for applying a predetermined tension to the tape member in the stock part by causing the tape member to chuck, a chuck means for chucking the tip of the tape member sent from the stock part, and a tape means for chucking the tape member in the flow direction. A tape attaching device for attaching the tape member to the transparent substrate by pressing the tape member on the surface of the transparent substrate at an upstream position. 2. The feed roller includes a rotating wheel and a fixed body with which the rotating wheel slides, and has a plurality of suction holes formed on an outer peripheral surface of the rotating wheel. 2. The tape sticking device according to claim 1, wherein only the winding portion of the tape member communicates with the negative pressure source. Wherein said attachment means is in the form a displaceable in a direction coming close to or away from the transparent substrate, and while moving the transparent substrate in the horizontal direction, to roll on the transparent substrate
2. A sticking roller comprising:
The tape adhering device according to the above. 4. The tape adhering device according to claim 3 , wherein the adhering roller is formed of an elastic member having an arcuate surface having a convex central portion. 5. The tape sticking device according to claim 3, wherein said sticking roller is formed of conductive rubber and is held at a ground potential. 6. The apparatus according to claim 1, wherein said chucking means comprises a lower roller and an upper clamp member which comes into contact with and separates from said lower roller for chucking a leading end of the tape member. Tape sticking device.