JPS60109238A - Bonding device - Google Patents

Abstract

PURPOSE:To block disconnections due to the hang-up of a linear object by a method wherein at least one of the end plates of a spool is provided with a hang-up preventing means. CONSTITUTION:The spool has a cylindrical wire-wound part 1 for wire winding and end plates 2a and 2b formed at both ends in the axial direction. At the plate 2a on the side of placing on a spool mount 3 of the end plates of this spool, a guide 4 having a section shape of circular tray form is fitted in contact. Therefore, the spool is placed on the spool mount via guide with the plate 2a downward. Besides, circumferential wall 4a in the outer periphery of the guide projects out to the outer peripheral side of the plate slightly upward from the top of the plate. Accordingly, even when the wire around the wire-wound part sags e.g. in shifting from the first bonding point to the second bonding point, wire cuts due to its hang-up between the plate and the spool mount are eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to bonding technology, and in particular to a technology that is applicable and effective for spools for winding wire for wire bonding.

[Background Art] I In the manufacturing process of semiconductor devices, bonding wires made of gold (Au), aluminum (AI), etc. are used to electrically connect the bonding pads of pellets and conductive parts for external lead-out. There are cases.

In this case, the bonding wire is wound onto a spool and then unwound in the required amount for use (Japanese Patent Laid-Open No. 131765/1983).

This unwinding, or wire feeding, method is divided into two methods: a method in which the wire is supplied by pulling the wire through a hollow wire spool installed in a spool storage area and a hole in the guide of the lath tube; One possible method is to feed the wire by rotating the wire.

However, in these methods, there is a gap between the wire spool and the spool storage area, and when the wire slackens, the wire gets caught in that gap. The inventor has discovered that there is a problem in that the wire breaks at the neck of the bond.

[Object of the Invention] An object of the present invention is to provide a technique that can prevent a linear object such as a wire wound around a spool from being caught and cut during feeding.

The above and other objects and novel features of the present invention will become apparent from the description of this specification and the accompanying drawings.

[Summary of the Invention] A brief overview of typical inventions disclosed in this application is as follows.

That is, by providing a snag prevention means on at least one of the end plate portions of the spool, wire breakage due to the wire object being snagged is prevented.

[Embodiment 1] FIG. 1 is a side view, partially in cross section, of an embodiment of a spool in a bonding apparatus according to the present invention.

In this embodiment, the spool is used, for example, to wind up or unwind a wire used for wire bonding.

This spool includes a cylindrical wire winding part 1 for winding a wire, and end plate parts 2a formed at both axial ends of the cylindrical wire winding part 1.
, 2b.

Of the end plate portions of the spool, a guide 4 having a circular dish-shaped cross section is fitted tightly into the end plate portion 2a on the side placed on the spool storage space 3. Therefore, the spool is placed on the spool storage space 3 via the guide 4 with the end plate portion 2a facing downward. The peripheral wall 4a on the outer periphery of the guide 4 is attached to the end plate 2a on the outer periphery side of the end plate 2a.
It protrudes slightly above the top surface.

Therefore, in this embodiment, even if the wire wound around the wire winding part becomes slack when moving from the first bonding point to the second bonding point, for example,
There is no possibility that the wire gets caught in the gap between the end plate part 2a and the spool storage place 3 and breaks the wire.

[Embodiment 2] FIG. 2 is a side view showing a spool in a bonding apparatus according to another embodiment of the present invention.

In this embodiment, the outer periphery of the end plate portion 2a placed on the spool storage area is located at a lower angle in the figure than the end plate portion 2b on the opposite side.
It is made to have a larger diameter by the dimension indicated by l.

Therefore, in this embodiment as well, since the end plate portion 2a protrudes in the outer circumferential direction by the dimension L1, the wire winding portion l
Even if the wound wire becomes slack, it will not get caught in the gap between the end plate part 2a and the spool storage place 3, and breakage of the wire can be prevented.

[Embodiment 3] FIG. 3 is a front view showing a spool in a bonding apparatus according to another embodiment of the present invention.

In this embodiment, a disc-shaped guide plate 5 having a diameter larger than the diameter of the end plate 2a by a dimension L2 is fixed to the lower side of the end plate 2a of the spool by adhesive or the like.

Therefore, in this embodiment, since the outer circumferential portion of the guide plate 5 protrudes beyond the end plate portion 2a by the dimension L2,
This can prevent the wire from getting caught.

Note that the guide plate 5 may be made of resin or the like integrally molded with the end plate portion 2a and the like.

[Embodiment 4] FIG. 4 is a sectional view of a spool in a bonding apparatus according to another embodiment of the present invention.

In this embodiment, ring-shaped protrusions 2a1 and 2b1 extend in opposite directions inside the outer peripheries of both end plates 2a and 2b.
are integrally formed.

By providing the protrusions 2a1 and 2b1, it is possible to prevent the wire from being caught on the wire windings 2a and 2b.

Note that a plurality of ring-shaped protrusions may be provided.

[Effects] (l) At least one end of the spool has a snag prevention means, which prevents a wire or other wire wound around the spool from getting caught and prevents the wire from being cut. can.

(2) According to the above (1), the supply of the linear material is not interrupted, so the working efficiency and the operating rate of the apparatus are improved.

(3) 8 When the spool of the present invention is used for a wire for wire bonding, it is possible to prevent neck breakage or disconnection of the wire when moving from a first bonding point to a second bonding point, for example.

Although the invention made by the present inventor has been specifically explained above based on Examples, it goes without saying that the present invention is not limited to the Examples and can be modified in various ways without departing from the gist thereof. Nor.

For example, the anti-snag structure at the end of the spool may have various structures other than the above-described embodiments.

Further, the winding portion and the end plate portion of the spool may be integrally molded, or may be assembled from separate pieces.

[Field of Application] In the above explanation, the invention made by the present inventor was mainly applied to wire bonding wire, which is the field of application that formed the background of the invention, but the invention is not limited to this, for example, The present invention can be widely applied to any linear object that can be caught on the spool, such as wire or thread used for purposes other than wire bonding.

[Brief explanation of the drawing]

FIG. 1 is a side view, partially in cross section, of a spool in a bonding device according to a first embodiment of the present invention, FIG. 2 is a side view of a spool in a bonding device according to a second embodiment of the present invention, and FIG. FIG. 4 is a side view of a spool in a bonding apparatus according to a third embodiment of the present invention, and FIG. 4 is a cross-sectional view of a spool in a bonding apparatus according to a fourth embodiment of the present invention. 1... Wire winding part, 2a, 2b... End plate part, 2a
1.2b1... protrusion (catch prevention means), 3.
... Spool storage area, 4... Guide (catch prevention means), 5... Guide plate (catch prevention means). Figure 1 Figure 3 Figure 2) Figure 4 Figure 1 Z, 1

Claims (1)

[Scope of Claims] 1. A bonding device characterized by having a catch prevention means on at least one of the end plate portions of the spool. 2. The bonding apparatus according to claim 1, wherein the snagging prevention means comprises a guide fitted in close contact with one end plate. 3. The bonding apparatus according to claim 1, wherein the snagging prevention means is formed by making one end plate portion larger in diameter than the other end plate portion. 4. The device according to claim 1, wherein the snagging prevention means comprises a guide formed on one end plate portion and having a diameter larger than that of the end plate portion and the other end plate portion. bonding equipment. 5. The bonding according to claim 1, wherein the snagging prevention means comprises an annular or annularly arranged protrusion projecting inward in the axial direction from the peripheral edge of at least one end plate. Device.