JPH05152044A - Bonding device for small pitch lead device - Google Patents

Abstract

PURPOSE:To provide a bonding device having the capability of easily maintaining the flatness of the pressing side of a presser tool, and ensuring the high durability of the tool. CONSTITUTION:This bonding device is equipped with a presser tool 4 having a pressing side 4a faced to a pressed surface S, a presser tool drive mechanism 10 for pressing the tool 4 in a direction N perpendicular to the pressing side 4a, a filament body 6 coming in pressed contact between the side 4a and the surface S when the tool 4 is at a position for pressing the surface S, and a filament body feed mechanism 20 for feeding the filament body 6 along the pressed surface S.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bonding apparatus for a narrow pitch lead device such as a TAB device, and more particularly to a bonding apparatus capable of easily maintaining the flatness of a pressure tool of this apparatus and improving its durability. ..

[0002]

2. Description of the Related Art In recent years, panel elements such as liquid crystal panels and plasma display panels have been widely used as displays for computers and word processors. In this panel element, a circuit is provided on the inner surface of a pair of laminated glass plates, and a large number of panel electrodes are exposed on the surface of the outer edge portion other than the corner portions. Usually, the panel electrodes are arranged in a row with a narrow pitch of several tens of μm, and a narrow pitch lead device such as a TAB device having leads of the same narrow pitch is bonded to the panel electrode.

As one of the means for bonding the leads of the narrow pitch lead device to the panel electrode, there is a curable resin, especially an ultraviolet curable insulating resin. This means will be described with reference to FIG. First, the curable resin 103 is applied to the entire surface of the transparent panel main material 101 on the side of the panel electrode 102 (FIG. 8A). Next, the lower surface 105b of the lead 105 of the narrow pitch read device
Is placed so as to be bonded to the upper surface 102a of the panel electrode 102, and the upper surface 105a of the lead 105 and the upper surface 103a of the curable resin 103 form a pressed surface S.
The pressing surface 104a of the pressing tool 104 is superposed on the pressing surface 104 to press the pressed surface S, and the curable resin 10 is irradiated with ultraviolet rays.
3 is cured ((b) in the same figure). Next, when the curing is completed, the surface to be pressed S is pushed to the pressing surface 104a of the pressing tool 104.
And the bonding between the lead 105 and the panel electrode 102 is completed (FIG. 7C). Here, at the pressurizing position ((b) in the figure), the curable resin 10
3 to the pressed surface S composed of the upper surface 103a of the lead 105 and the upper surface 105a of the lead 105.
Was in direct contact with and pressing.

[0004]

By the way, the pressed surface,
Particularly, in order to uniformly press the upper surfaces of a large number of leads, it is essential to keep the flatness of the pressing surface of the pressing tool high, but it is difficult to maintain the flatness of the pressing surface according to the above conventional technique. was there. That is, in the prior art, since the pressing surface of the pressing tool was directly in contact with the upper surfaces of many leads to apply pressure, in order to apply an even force to each lead,
The pressure tool must be made of a soft material having some elasticity, for example, a resin.

However, it is generally extremely difficult to process the pressing surface of the pressure tool made of a material having elasticity to have a high flatness (about several μm). Further, since the pressing surface having elasticity is directly in pressure contact with the lead harder than this pressing surface, an indentation remains on the pressing surface to easily reduce the flatness, and it is necessary to frequently replace the pressing tool. there were. Further, since the pressing surface also comes into direct pressure contact with the curable resin, the curable resin adheres to the pressing surface and the flatness decreases. Therefore, it is necessary to constantly clean the pressing surface. As described above, according to the conventional technique, it is difficult to maintain the flatness of the pressing surface of the pressure tool, and the durability of the pressure tool is low.

Therefore, an object of the present invention is to provide a bonding apparatus which can easily maintain the flatness of the pressing surface of the pressure tool and has a high durability of the pressure tool.

[0007]

To this end, the present invention provides a pressing tool having a pressing surface facing a surface to be pressed, and a pressing tool for pressing the pressing tool in a direction perpendicular to the pressing surface. When the drive mechanism and the pressing tool are in the pressing position of the pressed surface, a linear member that makes pressure contact between the pressing surface and the pressed surface, and the linear member on the pressed surface. And a feeding mechanism for the filamentous body.

[0008]

In the above structure, the lower surface of the linear member is positioned on the pressed surface where the upper surface of the lead and the upper surface of the curable resin are alternately arranged, and the pressing tool driving mechanism is operated in the pressing direction to apply pressure. When the pressing surface of the tool is brought into pressure contact with the upper surface of the linear body, the pressing force of the pressing tool driving mechanism is transmitted to the pressed surface via the linear body. Then, after curing the curable resin, the pressing tool driving mechanism is operated in the pulling direction to separate the pressing surface of the pressing tool from the linear body, and the linear body feeding mechanism is operated to reduce the flatness. The used part of the linear body is fed, and the pressing surface of the pressing tool is pressed against the unused part of the linear body with high flatness. In this way, since the pressing surface of the pressure tool does not directly contact the surface to be pressed, the flatness of this pressing surface does not decrease due to the indentation of the lead or the adhesion of the curable resin It is possible to improve the property.

[0009]

Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of essential parts showing a bonding apparatus of the present invention. D is a panel element such as a liquid crystal panel or a plasma panel, and the panel electrodes 2 are exposed in rows on the surface of the outer edge of the panel element D. Then, an ultraviolet curable resin 3 is applied onto the panel electrode 2 (see also FIG. 4A), and the lead L of the TAB device P is aligned with the panel electrode 2 and polymerized to form an upper surface of the lead L and the resin. The pressed surface S is formed from the upper surface 3 (see also FIG. 6B).
Is a filament made of, for example, a nylon thread or a nylon thin tape, and can obtain high flatness at low cost.
There are various conceivable linear bodies 6, in short, as long as they can sufficiently transmit the pressing force of the pressing tool driving mechanism 10 described later to the pressed surface S, and further, the leads L and Do not damage the pressure tool 4 (described later)
A material having a little elasticity is desirable.

The linear member 6 is supported by the feed mechanism 20 so that it can be brought into contact with the surface S to be pressed in a tensioned state. When the feed mechanism 20 is operated, the linear member 6 has a desired length along the surface S to be pressed. Can be sent. As shown in detail in FIG. 2, the feeding mechanism 20 includes a take-up reel 21 around which the linear member 6 is wound, a take-up side roller train including a tension roller 22 and a guide roller 23, a take-up reel 26, and a tension roller. 25 and a roller row on the winding side, which includes guide rollers 24, are symmetrically provided on both sides of the pressed surface S, and the drive shafts 21a and 26a of the feeding reel 21 and the winding reel 26 respectively include The output shafts 28 and 27 of the motors M and M are connected to each other, and the filamentous body 6 is fed along the feeding direction (direction of arrow C in FIG. 2).
The tension roller 22, the guide roller 23, the guide roller 24, the tension roller 25, and the take-up reel 26 are sequentially rotated. Further, the shaft support portions 22a and 25a of the tension rollers 22 and 25 are connected to the respective tips of the springs 22b and 25b, and the springs push the filament body 6 in the direction of arrow t in FIG.
It is to adjust the tension of.

Reference numeral 4 denotes a pressing tool having a pressing surface 4a that presses the linear member 6 and faces the pressed surface S. The tip of the rod 12 of the cylinder 11 is located at the center of the upper surface 4b of the pressing tool 4. The parts are connected. The cylinder 11 and the rod 12 constitute the pressure tool driving mechanism 10. The pressure tool drive mechanism 10 moves the pressure tool 4 to the position shown in phantom in FIG.
It is provided so as to move up and down between the pressing position shown by the solid line position, and the pressing surface 4a of the pressing tool 4 is pressed against the linear member 6 at this pressing position, Pressed surface S A pressing force in a direction perpendicular to this surface S (direction of FIG. 2N) is applied (see also FIG. 3). The pressure tool driving mechanism 10 is not limited to the cylinder, but may be any pressure mechanism capable of pressing the pressure tool 4 with sufficient force. For example, a motor (not shown) and an output shaft of the motor may be connected. A transmission mechanism for converting the rotational force of the output shaft to move the pressure tool up and down may be used.

This apparatus has the above-mentioned structure, and its operation will be described below. First, the ultraviolet curable resin 3 is applied on the panel electrode 2 (see FIG. 4A), the leads L are polymerized on the panel electrode 2, and the pressed surface S including the upper surface of the lead L and the upper surface of the resin 3 is formed. It is formed (see FIG. 2B). Next, as shown in FIG. 2, the motors M, M of the feed mechanism 20 are operated,
The filament body 6 is fed while adjusting the tension with the tension rollers 22 and 25, and the lower surface of the unused filament body 6 is positioned on the pressed surface S. Next, the cylinder 11 is operated and the rod 12
Is lowered in the pushing direction (see arrow N) which is the direction perpendicular to the pushing surface 4a of the pushing tool 4, and the pushing tool 4 is moved to the pushing position. Then, the pressing surface 4a comes into pressure contact with the upper surface of the linear body 6, and when the pressing tool 4 is further pressed, the pressing force is transmitted to the pressed surface S via the pressing surface 4a and the linear body 6, and the lead L and the panel. The electrode 2 is pressed with sufficient force. as a result,
The resin 3 remaining between the lower surface of the lead L and the upper surface of the panel electrode 2 is pushed out from between these surfaces, and the lead L contacts the panel electrode 2 (see also FIG. 3). In this state, ultraviolet rays are irradiated from below the panel substrate D to cure the resin 3. Then, after the resin 3 is cured, the cylinder 11 is operated in the opposite direction to raise the rod 12 in the pulling direction to separate the pressing surface 4a from the linear body 6, and it is sandwiched between the pressing surface 4a and the pressed surface S. The used part of the filamentous body 6 is fed by the feeding mechanism 20.

In the present invention, since the surface to be pressed S is pressed through the linear member 6, it is not necessary to form the pressing tool 4 with a material having elasticity as in the conventional means, and for example, stainless steel or the like is used. Can be made of a hard material like
It is easy to process the pressing surface 4a so as to have high flatness. Further, in the above embodiment, the ultraviolet curable resin 3
Although the bonding was performed by using, a thermosetting resin can also be used. When this thermosetting resin is used, the filament 6 has heat resistance. In addition, the used portion of the linear member 6 that has been pressed by the pressing surface 4a is to be disposed of after being wound by the take-up reel 26, but the linear member 6 is much more difficult than the pressing tool 4. Moreover, since it is possible to obtain a highly flat tool at a low cost and to improve the durability of the pressing tool 4, even if it is configured as described above, there is no particular increase in the cost of the entire apparatus.

[0014]

As described above, the present invention provides a pressing tool having a pressing surface facing a surface to be pressed, and a pressing tool driving mechanism for pressing the pressing tool in a direction perpendicular to the pressing surface. When the pressure tool is at the pressure position of the pressed surface, a linear member that is pressed between the pressing surface and the pressed surface, and the linear member along the pressed surface. Since the bonding device for the narrow-pitch lead device is composed of the feeding mechanism of the feeding linear body, the pressing surface of the tool does not come into direct contact with the pressed surface, and the flatness of this pressing surface is easily maintained. Therefore, it is possible to obtain a bonding apparatus with high durability of the pressure tool.

[Brief description of drawings]

FIG. 1 is a perspective view of a main part of a bonding apparatus according to the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is a sectional view of FIG. 2B-B.

FIG. 4 is an explanatory view of forming the pressed surface.

FIG. 5 is an explanatory view of a conventional bonding process.

[Explanation of symbols]

 4 Pressure Tool 4a Pressing Surface 6 Striation 10 Pressure Tool Driving Mechanism 20 Feeding Mechanism N Vertical Direction to Pressing Surface S Pressed Surface

Claims (1)

[Claims] 1. A pressing tool having a pressing surface facing a pressed surface, a pressing tool drive mechanism for pressing the pressing tool in a direction perpendicular to the pressing surface, and the pressing tool is provided with the pressing surface. A linear member that is in pressure contact between the pressing surface and the pressed surface when the pressing surface is in the pressing position, and a linear member feeding mechanism that sends the linear member along the pressed surface. A bonding apparatus for a narrow-pitch lead device, which has.