JP3036434B2 - Hoop material supply reel exchange mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanism for replacing a hoop material supply reel, for example, a method for manufacturing a semiconductor device, which is attached to a die bonder having a supply reel wound with a lead frame. The present invention relates to a mechanism for replacing a new supply reel.

[0002]

2. Description of the Related Art For example, a semiconductor device is generally manufactured by mounting a semiconductor element on a lead frame made of metal such as Fe or Cu, and then molding the main part with a resin. In the manufacture of this type of semiconductor device, a long lead frame is used, and a semiconductor device is sequentially mounted on each mounting portion formed at a constant pitch on the lead frame by using a manufacturing facility called a die bonder. Like that. This die bonder includes a supply reel for feeding a long lead frame.

As shown in FIGS. 7 and 8, a conventional die bonder has a supply reel 2 on which a long lead frame 1 is wound.
Is provided. In this supply reel 2, in order to prevent the wound lead frames 1 from adhering to each other, the interlayer paper 3 is wound together with the lead frame 1 and the lead frame 1 is wound.
Are interposed between the layers. The die bonder 5 unwinds the lead frame 1 from the supply reel 2 and also unwinds the interlayer paper 3 interposed between the lead frames 1 and also has a take-up reel 4 for winding the interlayer paper 3. I do.

[0004] The supply reel 2 and the take-up reel 4 are located on the side of the die bonder 5 at a high position.
The take-up reel 4 is arranged in a vertical position such that the take-up reel 4 is at a low position. The supply reel 2 and the take-up reel 4 are rotatably supported by a support mechanism (not shown) such that the rotation axis direction is orthogonal to the linear feed direction X of the lead frame 1. The die bonder 5 is provided with a drive pulley (not shown) for pulling out the lead frame 1 from the supply reel 2.

[0005] In this die bonder, the lead frame 1 is pulled in the linear feed direction X by the rotational drive of the drive pulley, and the lead frame 1 is paid out from the supply reel 2 by the pulling by the drive pulley. Note that, in the feeding portion of the lead frame 1 from the supply reel 2,
At all times, the lead frame 1 is held in a slack state to some extent. The lead frame 1 fed out from the supply reel 2 in this manner is fed in the linear feed direction X by the die bonder 5 in the same posture, while the interlayer paper 3 fed out together with the lead frame 1 is wound on the take-up reel 4. Taken.

[0006]

In the above-described conventional die bonder 5, when all the lead frames 1 of the supply reel 2 are fed and the supply reel 2 becomes empty, the empty supply reel 2 is newly supplied. It is necessary to replace the reel 2. The replacement work is performed by removing a vacant supply reel 2 arranged at a high position beside the die bonder 5 from the support mechanism and attaching a new supply reel 2.

However, since the new supply reel 2 around which the lead frame 1 and the interlayer paper 3 are wound is heavy, even if a worker such as a woman tries to attach the supply reel 2, a position where the attachment position is high is high. Because
Lifting the heavy supply reel 2 to a high mounting position is difficult and burdensome, and the replacement work is time-consuming and time-consuming. As a result, the die bonder 5 is stopped for a long time and the operating efficiency is reduced. There was a problem of inviting.

In particular, when the use of the supply reel 2 is prolonged to reduce the replacement work and increase the operation efficiency of the equipment, the supply reel 2 is wound to increase the number of turns of the lead frame 1 wound on the supply reel 2. 2 tends to increase in diameter, and the above-mentioned problem in the work of replacing the supply reel 2 becomes even more remarkable.

The present invention has been proposed in view of the above problems, and an object of the present invention is to make it possible for a worker such as a woman to easily replace a supply reel. It is in.

[0010]

As a technical means for achieving the above object, the present invention is to transfer a hoop material in a predetermined direction while feeding the hoop material from a supply reel wound with a long thin hoop material. A supply reel exchanging mechanism attached to a feeding device, wherein a support frame on which the supply reel is detachably mounted is supported on the feeding device in a tiltable and upright state, and the support frame is provided on a supply reel. When replacing,
When the support frame is tilted to ground the empty supply reel, and when a new supply reel is mounted and raised, a portion extending from the supply reel is provided so as to be gripped and raised. Preferably, the supply reel is mounted at a low position on the support frame.

Further, the present invention is characterized in that the support frame is provided with an urging means in a direction in which the support frame is gently inclined when the supply reel is replaced.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a die bonder used in manufacturing a semiconductor device will be described with reference to FIGS. 1 and 2 show a schematic configuration of an exchange mechanism of the present invention, and FIGS. 3 to 5 show a schematic configuration of a die bonder provided with an exchange mechanism (not shown) of the present invention.

As shown in FIGS. 3 to 5, a die bonder 11, which is a lead frame feeding device, winds a metal lead frame 12 made of a long and thin hoop material, such as Fe or Cu, together with an interlayer paper 13. The apparatus includes a supply reel 14 and a take-up reel 15 that winds up the interlayer paper 13 fed out together with the lead frame 12 from the supply reel 14.

In the die bonder 11, the supply reel 14
And the take-up reel 15 is arranged such that its rotation axis direction is parallel to the linear feed direction X of the lead frame 12. With such an arrangement relationship, the supply reel 14 and the take-up reel 15 are located on the side of the die bonder 11 as compared with the conventional die bonder 5 (see FIG. 8A).
Occupies a smaller area (see FIG. 4B).

In particular, the number of turns of the lead frame 12 wound around the supply reel 14 is increased in order to prolong the use of the supply reel 14 to reduce the replacement work and increase the operation efficiency of the equipment, thereby increasing the diameter of the supply reel 14. Even, die bonder 11
Has no effect on the area occupied by the supply reel 14 on the side of.

The supply reel 14 and the take-up reel 1
Numeral 5 is rotatably supported by a support frame (described later) attached to the die bonder 11, and both rotating shafts of the supply reel 14 and the take-up reel 15 have respective drive sources of a motor with an electromagnetic brake and a torque motor (described later). Are connected respectively. The die bonder 11 is provided with a drive pulley (not shown) for pulling out the lead frame 12 from the supply reel 14.

In the die bonder 11, the lead frame 12 is moved in the linear feed direction X by rotating the drive pulley.
And the lead frame 12 slackened by the pulling by the drive pulley is paid out. At this time,
In a portion where the lead frame 12 is fed from the supply reel 14, the supply reel 14 intermittently rotates so as to always keep the lead frame 12 in a somewhat slack state. The interlayer paper 13 fed out together with the lead frame 12 from the supply reel 14 is taken up by a take-up reel 15.

Here, the rotation axis direction of the supply reel 14 is set to the linear feed direction X of the lead frame 12 by the die bonder 11.
Therefore, it is necessary to twist the lead frame 12 fed from the supply reel 14 by 90 ° from the radial direction of the supply reel 14 in the linear feed direction X of the lead frame 12. Therefore, a guide mechanism 16 is provided to change the direction while twisting the lead frame 12 fed out from the supply reel 14 in the radial direction in a linear feed direction X orthogonal to the radial direction.

As shown in FIGS. 1 and 2, the guide mechanism 16 moves the lead frame 12 at a plurality of positions along the movement path from the supply reel 14 to the die bonder 11 from both the front and back sides. It has a structure in which a pair of regulating guide rods 17a to 17d are arranged.

More specifically, as shown in FIG. 2, the supply reel 14 and the take-up reel 15 are arranged such that the rotation axis direction thereof is parallel to the linear feed direction X of the lead frame 12.
It is attached to a support frame 18 arranged upright on the side of the die bonder 11.

The supply reel 14 is supported by a reel attaching / detaching portion 19 located substantially at the center of the support frame 18, and is arranged at a lower position below. The reel attaching / detaching portion 19 has a motor 2 with an electromagnetic brake for rotating the supply reel 14.
0 is provided to prevent the lead frame from being turned around and extended even if tension is applied to the interlayer paper at the time of stop. On the other hand, the take-up reel 15 is
8 is supported by a reel attaching / detaching portion 21 located at an upper end of the reel 8 and is arranged at a high position above. A torque motor 22 for rotating the take-up reel 15 is provided on the reel attaching / detaching portion 21.
Is provided so that tension is always applied. still,
By setting the supply reel 14 in a vertical position such that the supply reel 14 is at a lower position and the take-up reel 15 is at an upper position, an adverse effect due to the vibration of the supply reel 14 during operation of the supply reel 14 is possible. Can be suppressed.

The guide rods 17a to 17d for twisting the lead frame 12 fed from the supply reel 14 are provided at, for example, four places along the moving path of the lead frame 12.

First and second guide rods 17a, 17b
Is located immediately below the supply reel 14 mounted on the support frame 18, the first guide rod 17a is disposed at a position immediately after the lead frame 12 is fed from the supply reel 14, and the second guide rod 17b is The lead frame 12 extended from the reel 14 is disposed at a position where the lead frame 12 sags and faces upward. These first and second guide rods 17
a and 17b are provided at both ends of the horizontal frame 23 fixed to the lower portion of the support frame 18.

The third guide bar 17c is disposed immediately above the second guide bar 17b, and is attached to the support frame 18 so that the vertical position can be adjusted. The fourth guide rod 17d is arranged above the third guide rod 17c near the die bonder from the supply reel 14, and is attached to the tip of a mounting base 24 provided on the upper part of the die bonder 11.

The fourth guide rod 17d can be attached to the support frame 18, like the third guide rod 17c. These third and fourth guide rods 17
c and 17d have a structure in which the directivity angle is variable in a plane orthogonal to the axis center of the support frame 18, that is, in a horizontal plane so that the twisted state of the lead frame 12 can be adjusted. A guide member 25 for guiding the lead frame 12 in the horizontal linear feed direction X is disposed above the fourth guide rod 17d.

The lead frame 12 fed from the supply reel 14 and pulled by the drive pulley keeps the first guide rod 17a in the pulled-out posture.
After being inserted between the second guide rods 17b, the direction is changed and turned upward, and is inserted between the second guide rods 17b. This first guide rod 17
The slack state of the lead frame 12 between the first guide rod 17a and the second guide rod 17b is determined by detecting the presence or absence of the lead frame 12 by upper and lower limit sensors (not shown) arranged at predetermined vertical positions. Lead frame 12 between
The motor 2 with the electromagnetic brake against the traction by the drive pulley
0 is operated to rotate the supply reel 14 intermittently.

The lead frame 12 inserted between the second guide rods 17b is sequentially inserted between the third guide rod 17c and the fourth guide rod 17d, and the guide member is moved from the fourth guide rod 17d to the guide member. 25 through die bonder 11
To the horizontal linear feed direction X. In this movement path, the third and fourth guide rods 17c and 17d are respectively oriented in directions that form a predetermined angle with respect to the rotation axis direction of the supply reel 14 in the horizontal plane. For example, the third guide rod 17c is oriented at 30 ° from the rotation axis direction of the supply reel 14, and the fourth guide rod 17d is oriented at an angle of 60 ° from the rotation axis direction of the supply reel 14, respectively.

As a result, the lead frame 12 is
The guide rods 17b and 17c, between the third guide rod 17c and the fourth guide rod 17d, between the fourth guide rod 17d and the guide member 25 are sequentially twisted by 30 °. From the guide member 25 to the die bonder 1
The lead frame 12 fed to 1 will eventually face a linear feed direction X parallel to the rotation axis direction of the supply reel 14.

The twisted state of the lead frame 12 from the second guide rod 17b to the die bonder 11 via the third and fourth guide rods 17c, 17d is determined by the third and fourth guide rods 17c. , 17d and the vertical position of the third guide bar 17c can be freely changed by adjusting the vertical position for each type of lead frame 12. On the other hand, the interlayer paper 13 fed out together with the lead frame 12 from the supply reel 14 is taken up on the take-up reel 15 with a certain tension applied by the torque motor 22.

As described above, when all the lead frames 12 of the supply reels 14 are fed to the die bonder 11 and the supply reels 14 become empty, the empty supply reels 14 need to be replaced with new supply reels 14. . The replacement operation of the supply reel 14 utilizes a structure described below.

That is, the support frame 18 that supports the supply reel 14 and the take-up reel 15 has a structure that can be tilted about its lower end. Specifically, a pivot 26 with the die bonder 11 is provided at the lower end of the support frame 18. The pivot portion 26 has a structure in which a support frame 18 is attached to a base 27 fixed to a lower portion of the side surface of the die bonder 11 via a support shaft 28.
Thus, the support frame 18 can tilt the supply reel 14 in the radial direction.

On the other hand, the die bonder 11 and the support frame 18
Between them, there is provided an urging means in the upright direction, for example, a spring 29. The spring 29 has a structure in which a position near the pivot 26 of the die bonder 11 and a substantially intermediate position of the support frame 18 are connected as shown. The support frame 18 is constantly urged by the spring 29 in a direction in which the support frame 18 is erected. For example, the support frame 18 is in a balanced state in a state where the empty supply reel 14 and the take-up reel 15 on which the interlayer paper 13 is wound are mounted. It is set to be.

A lock key 30 for fixing the support frame 18 when the supply reel 14 is used is provided substantially at an intermediate portion of the support frame 18. The lock key 30 has a structure that can be locked to a part of the mounting base 24 of the fourth guide rod 17d provided on the die bonder 11 side. A sensor (not shown) such as a proximity switch is provided on a part of the mounting base 24.
The sensor detects that the lock key 30 has approached and the support frame 18 is standing upright, and activates the lock key 30 to automatically lock the support frame 18.

The empty supply reel 14 is replaced with a new supply reel 1.
The work of exchanging with No. 4 is performed in the following manner.
After releasing the lock key 30 of the support frame 18, the support frame 18 is tilted with the support shaft 28 of the pivot 26 as a fulcrum, as shown in FIG. At this time, the support frame 18 is gradually tilted by the action of the spring 29 without being sharply tilted.

Thereafter, the empty supply reel 14 is removed from the reel attaching / detaching portion 19, and a new supply reel 14 around which the lead frame 12 and the interlayer paper 13 are wound is mounted on the reel attaching / detaching portion 19 of the support frame 18 instead. At this time, the worker can mount the heavy supply reel 14 on the reel attaching / detaching portion 19 of the tilted support frame 18 without lifting the supply reel 14 while keeping it on the floor. I'm done.

The take-up reel 15 for the interlayer paper 13
After the replacement, the upper part (for example, a in FIG. 6) of the support frame 18 extending from the supply reel 14 may be gripped and the support frame 18 may be lifted and raised. At this time, since the upper part of the support frame 18 is grasped more than the reel attaching / detaching part 19 on which the supply reel 14 is mounted, a smaller force is required than directly lifting the heavy supply reel 14, and Since the support frame 18 is urged upward by the spring 29, the support frame 18 can be erected with even smaller force. Finally, as described above, the lock key 3
0 locks the support frame 18 to maintain the upright state.

[0037]

According to the present invention, the support frame for supporting the supply reel has a tiltable structure, and the supply reel is disposed at a low position of the support frame, so that the supply reel, which is a heavy material, can be replaced. In the work, the burden on the worker can be reduced, the work time can be shortened by quick replacement, the stop time of the feeding device can be minimized, and the operation efficiency can be dramatically improved. . In particular,
When the length of the supply reel is increased to prolong the use of the supply reel to reduce the replacement work and increase the operation efficiency of the equipment, a more remarkable effect is exhibited.

If a biasing means such as a spring is attached to the support frame of the supply reel, a small force is required when the support frame is tilted or lifted when the supply reel is replaced. Is further reduced, which is preferable.

[Brief description of the drawings]

FIG. 1 is a side view showing a schematic configuration of a replacement mechanism of a hoop material supply reel.

FIG. 2 is a front view of the exchange mechanism of FIG. 2;

FIG. 3 is a front view showing a schematic configuration of a die bonder provided with a supply reel.

FIG. 4 is a plan view of the die bonder as viewed from the line II in FIG. 3;

FIG. 5 is a side view of the die bonder of FIG. 3;

FIG. 6 is a side view showing an operation state of the support frame when the supply reel is replaced.

FIG. 7 is a front view showing a schematic configuration of a conventional die bonder.

FIG. 8 is a plan view of the die bonder of FIG. 7;

[Explanation of symbols]

 Reference Signs List 11 feeding device (die bonder) 12 hoop material (lead frame) 14 supply reel 18 support frame 29 biasing means (spring)

Claims (3)

(57) [Claims] 1. A supply reel exchange mechanism attached to a feeding device for transferring a hoop material in a predetermined direction while feeding the hoop material from a supply reel wound with a long and thin hoop material. A detachably mounted support frame is supported on the feeding device in an upright state such that the support frame can be tilted.When the supply reel is replaced, the support frame is tilted to ground the empty supply reel, and a new A hoop material supply reel exchanging mechanism, comprising: a portion extending from the supply reel in a state capable of being gripped and raised when the supply reel is mounted and then raised. 2. The hoop material supply reel exchanging mechanism according to claim 1, wherein the supply reel is mounted at a low position of a support frame. 3. The support frame is provided with a biasing means in a direction in which the support frame is gently tilted when the supply reel is replaced.
Or the replacement mechanism of the hoop material supply reel according to 2.