JP3858816B2 - Spool case for bonding wire - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bonding wire spool case, and more particularly to a spool case including a container main body that houses a spool and a lid that houses the container main body.
[0002]
[Prior art]
Conventionally, in semiconductor assembly manufacturing, a spool around which a bonding wire is wound is taken out of a spool case and mounted on a spool holder on a wire bonder. However, since the spool flange is handled by hand, there is a risk that a wire damage may be caused by touching the wire surface with a hand. Furthermore, in recent years, in order to increase the efficiency of semiconductor assembly manufacturing, the length of the bonding wire wound on the spool tends to be lengthened, and the loss when the above-mentioned wire damage defect occurs, There was a problem of getting bigger.
[0003]
In order to solve such a problem, various spool cases and spool holders have been developed.
[0004]
For example, Japanese Patent Laid-Open No. 11-274218 discloses a spool case in which a spool can be attached to a spool holder on a wire bonder without directly holding it by hand. The spool case includes a container body and a lid that are fitted to each other. In the container body, a plurality of engagements that elastically engage the outer peripheral edge of the flange of the spool on the inner surface of the outer peripheral ridge that fits the lid. The engagement portion is elastically deformed integrally with the container body, and the spool can be detachably held.
[0005]
In addition, along with increasing the efficiency of semiconductor assembly manufacturing, it is unavoidable to support small-lot, high-mix production, and during use, the frequency of switching to bonding wires of different wire diameters or different wire types has increased. Yes.
[0006]
Therefore, the spool case disclosed in Japanese Patent Laid-Open No. 2000-49187, the spool holder disclosed in Japanese Patent Laid-Open No. 11-100170, Japanese Patent Laid-Open No. 2002-57184, one end of the spool body, Or since one flange is hold | maintained, a spool can be hold | maintained in a remote positional relationship from the site | part hold | gripped by hand. As mentioned above, when removing the spool from the wire bonder, there is a risk of touching and damaging the bonding wire. However, the development of these spool cases or spool holders may damage the bonding wire. It became possible to remove the spool from the wire bonder.
[0007]
However, the bonding wire in use must be in a normal state when it is next used, but due to vibrations etc. that occur when moving to store the spool case around which the bonding wire is wound, They could get tangled together, loosened from the spool, and eventually collapsed. Since it will be in a state which cannot be used if it becomes like this, it is indispensable conditions to fix a bonding wire.
[0008]
In the case of using the spool case disclosed in the aforementioned Japanese Patent Laid-Open No. 2000-49187, or the spool holder disclosed in Japanese Patent Laid-Open No. 11-100170 and Japanese Patent Laid-Open No. 2002-57184, it was removed from the wire bonder. Later, when fixing the wire end with tape, etc., hold the gripping part of the spool case with one hand or the gripping part of the spool holder and hold the tweezers etc. to stick the tape etc. with the other hand. Become. In the wire end fixing operation using tape or the like, it is necessary to fix the bonding wire while applying tension so that the bonding wire does not loosen. However, as described above, the part that holds the spool and the part that is held by the hand are remote. Because of the positional relationship, it is difficult to apply tension to the bonding wire. Therefore, the spool case or the spool holder may be accidentally dropped, or the operator may concentrate on holding the gripping part by hand and neglect to apply tension to the bonding wire, thereby causing winding looseness. Furthermore, since the part that holds the spool and the part that is gripped by hand are in a remote positional relationship, the holding state of the spool becomes unstable, and there is a risk of damaging the wire by tweezers. It was.
[0009]
Further, a manufacturing dimensional error occurs in the spool and the spool case or the spool holder. In addition, repeated use causes wear of the engaging portion or the holding portion, and further wears a portion of the spool case or the spool holder that is gripped by hand. Due to these dimensional errors and wear, the holding force of the spool is lowered, and in some cases, the possibility of dropping the spool is increased, and there is a problem that reliability is poor.
[0010]
On the other hand, in Japanese Patent Application Laid-Open No. 2000-49187, the bottom surface portion and the upper edge have an arc-shaped side surface portion that follows the outer peripheral edge of the flange of the spool, and a cover surface that is connected to both of them and has an arch shape. Discloses a spool case in which a protrusion is installed on the inside, and a bottom surface portion, a cover surface, and the protrusion engage with and hold the outer peripheral edge of the flange of the spool. In this spool case, an opening for attaching and detaching the tape with the wire end fixed is also formed, and after removing from the wire bonder, problems that occur when performing the wire end fixing operation with tape or the like are unlikely to occur. It has become. However, because the part that engages and holds the outer peripheral edge of the flange of the spool is formed integrally, the dimensional error in manufacturing the spool and the spool case, and repeated use, the engaging part or the holding part Therefore, the spool holding force is lowered and the possibility of the spool dropping is higher than the spool case disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 11-274218. There was a problem with this aspect.
[0011]
[Patent Publication 1]
Japanese Patent Laid-Open No. 11-274218
[Patent Publication 2]
JP 2000-49187A [0013]
[Patent Publication 3]
Japanese Patent Laid-Open No. 11-100170
[Patent Publication 4]
Japanese Patent Laid-Open No. 2002-57184
[Problems to be solved by the invention]
The object of the present invention is not to directly hold the spool by hand, but can be stably operated even when the mass of the bonding wire wound around the spool is increased, and the wire end is fixed when removed from the wire bonder. It is an object of the present invention to provide a novel spool case which can be easily operated and has no dimensional error in manufacturing and no decrease in holding force due to repeated use.
[0016]
[Means for Solving the Problems]
In one aspect of the spool case for bonding wires of the present invention, the spool case is composed of a container body capable of elastic deformation and a lid, and accommodates the spool. The lid has a box shape with an open end, the dimensions of the housing in the axial direction of the spool to be accommodated are uniform, and the dimensions in the direction perpendicular to the axial direction of the spool to be accommodated are narrow at the bottom and open. The container body can cover the two flanges of the spool to be held in a circular arc shape, the cover surface having a U-shaped cross section extending in a flat shape, and the respective flange surfaces of the spool to be held. Are formed integrally with the two side plates of the shape that does not block the hole of the spool, the outer peripheral end of the flange of the spool contacts the inside of the cover surface of the container main body, And it is the external shape which can hold | maintain a spool in the state which compressed the cover surface from both sides, and can be accommodated in the inside of a cover body, and the open end part of the cover surface of a container body of a free state spreads.
[0017]
In a different aspect of the bonding wire spool case of the present invention, a bonding wire spool having a pair of circular flange surfaces and an outer peripheral portion between the flange surfaces is accommodated. The container body includes a container body and a lid body that accommodates the container body, and the container body is a flat surface extending from the arc-shaped portion that is in contact with a part of the outer peripheral portion of the spool along the circumferential direction and the arc-shaped portion. A cover surface comprising a pair of width surface portions extending in a shape, and a pair of side plates continuing at a predetermined width in the orthogonal direction from the cover surface along the edge of the cover surface, the pair of side plates being the arcuate portion And a portion of the flange surface of the spool that is in contact with the center surface of the flange surface, and the center hole of the flange surface is exposed. It consists of a width face plate connecting the face plates, and an opening is formed by the side face plate and the width face plate, the width face plate becomes a guide surface that slides the tip of the cover surface when the container body is accommodated from the opening, Place the container body so that the tip of the cover surface is along the guide surface. Then, the distance between the tip ends of the cover surface shrinks, the container main body is fixed to the cover member by the elastic force of the container body.
[0018]
Furthermore, it is preferable that a relief portion is formed in the end shape of the opening of the lid so that the side plate of the container body housed in the lid can be gripped.
[0019]
In addition, it is preferable that one or more protrusions that contact the outer peripheral end of the flange of the spool are provided inside the side plate of the container body so that the spool can be stably accommodated while the spool is gripped.
[0020]
Further, it is preferable that the end portion of the bonding wire is dimensioned so that it can be fixed by being sandwiched between the cover surface of the container body and the inside of the lid body when the container body is housed in the lid body. .
[0021]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described below with reference to the drawings.
[0022]
FIG. 1 is a perspective view showing a container body according to an embodiment of the present invention. FIG. 2 is a perspective view showing a lid of one embodiment of the present invention. FIG. 3 is a perspective view showing a state where the spool is held between fingers (not shown) in the container body shown in FIG. 4 is a perspective view showing a state in which the container main body shown in FIG. 1 is housed in the lid shown in FIG.
[0023]
The spool case includes a container body 1 and a lid body 2 which are fitted to each other, and the container body 1 and the lid body 2 are formed of a material that is relatively easily elastically deformed, such as plastic. The spool 3 around which the bonding wire is wound is accommodated in the container body 1 (FIG. 3) and accommodated in the lid 2 (FIG. 4).
[0024]
The container body 1 has an arc shape along the outer peripheral edge of the flange 3a of the spool 3 and a pair of side plates 1a, 1b that contact the flange surface 3a of the spool 3, and is orthogonal to the outer peripheral portions of the side plates 1a, 1b. And a cover surface 1c having a U-shaped cross section connected to each other. The upper part in FIG. The side plate 1a has a circular arc opening 6 that is slightly larger than the hole of the spool 3 and is largely opened in a U shape. The side surface plate 1 b has a circular opening 7 that is slightly larger than the hole of the spool 3, and is continuous from the opening 7 to the open surface 5. The container body 1 is not particularly provided with a mechanism for engaging the spool 3.
[0025]
The lid body 2 fitted to the container main body 1 has a substantially rectangular parallelepiped shape, and has a shape in which one surface (the upper side in FIG. 2) is opened, and has a shape that widens toward the opened surface. On the open surface side of the lid body 2, an escape portion 2 a for taking out the container body 1 is formed.
[0026]
Next, an operation from taking out the container body 1 containing the spool 3 around which the bonding wire is wound out from the lid 2 and mounting the spool 3 on the spool holder of the wire bonder will be described.
[0027]
First, first hold the lid 2 with one hand, hold the container body 1 with the other hand through the escape portion 2a of the lid, and take out the container body 1 so as to pull it out downward (from FIG. 4 upside down). 5), the cover surface 1c is grasped by hand. At this time, by holding the cover surface 1c by hand, the cover surface 1c is elastically deformed, the outer peripheral edge of the spool 3 is held by the container body 1, and the spool 3 is fixed (FIG. 3). Furthermore, since the spool 3 is grasped by hand through the container main body 1, there is an effect of giving the bonding worker a sense of security. In order to maximize this effect and to attach and detach the container body 1 without interfering with the periphery of the spool holder of the wire bonder, the width dimension of the side plate 1b of the container body 1 is 58.5 mm or more, 70 0.0 mm or less is desirable.
[0028]
Next, the side plate 1a having a large U-shaped opening 6 is on the back side, and the side plate 1b having a circular opening 7 and a notch continuous to the opening surface 5 is on the front side. While holding the spool 3 by pressing the cover surface 1c by hand (FIG. 3), the spool 3 is mounted on the spool holder on the wire bonder. Since the opening 6 of the side plate 1a is larger than the hole of the spool 3, there is no interference when the spool 3 is mounted. Further, since the front side plate 1b is formed with a circular opening 7 and a notch continuous to the open surface 5, the spool holder has a protruding portion such as a spring-like latching portion. Can also be accommodated. After the spool 3 is mounted on the wire bonder, the side plate 1a on the back side has a large U-shaped opening 6 so that it can be mounted by sliding the container body 1 in the opposite direction to the open surface 5. Complete.
[0029]
When removing the spool 3 from the wire bonder, the spool 3 is accommodated inside the container body 1 by sliding the open surface 5 first, and the flange outer peripheral edge of the spool 3 abuts the container body 1. This is completed by holding the cover surface 1c by hand and pulling it out of the spool holder. At this time, when the operator holds the cover surface 1c by hand, the container body 1 is elastically deformed, the open surface 5 is narrowed, and the diameters of the openings 6 and 7 are narrowed at the same time. The contact force with the outer peripheral edge of the flange 3 increases, and there is no risk of the spool 3 falling.
[0030]
When the container body 1 containing the spool 3 is fitted to the lid body 2, the lid body 2 is shaped so as to expand toward the open surface, so that the container body 1 is elastically deformed as shown in FIG. 3. As a result, the open surface 5 is narrowed, and the spool is firmly fixed in a state of being fitted as shown in FIG. Therefore, by using the spool case of the present invention, the spool 3 does not move during transportation, and the bonding wire is not collapsed or damaged.
[0031]
The spool case of the present invention simply accommodates the spool 3 in the container body 1, and in particular, there is no means for fixing the container body 1 and the spool 3. The spool 3 is fixed as described above. This is due to elastic deformation of the cover surface 1c of the main body 1. Therefore, even if there are dimensional errors in manufacturing the spool 3 and the spool case, wear due to repeated use, and the like, these influences are absorbed by the elastic deformation of the spool 3 and have no practical effect.
[0032]
A different embodiment of the invention is shown in perspective view in FIG.
[0033]
In the state where the spool 3 is accommodated in the container body 10 and the container body 10 is fitted to the lid, or the container body 10 containing the spool 3 is gripped, the outer peripheral edge of the flange of the spool 3 is the container body 10. It is positioned so as to be in contact with a polygonal convex shape or cylindrical projection 10e installed inside. The protrusion 10e stabilizes the position of the spool 3 when the spool 3 is accommodated in the spool case and transported, and has an effect of giving a sense of security when the operator handles the spool 3 through the container body 10. Since the protrusion 10e also becomes an obstacle when the spool 3 is accommodated in the container body 10, when the spool 3 is accommodated in the container body 10, the spool 3 is placed in the container so that the outer peripheral edge of the flange does not contact the protrusion 10e. The spool 3 is accommodated only when the container body 10 and the lid are fitted in the body 10 or when the container body 10 is gripped by hand, that is, only when the distance between the side surfaces of the cover surface 10c is narrowed. Dimension so that it touches the outer peripheral edge of the flange and the flange surface. Although the number of the protrusions 10e may be one as shown in FIG. 5, it is desirable that two protrusions 10e are installed on both sides of the side plate.
[0034]
By using the spool case of the present invention, after the spool in use is accommodated in the container body, the container body is placed in a state where the wire end is hung from the end of the cover surface on the open surface side to the outside of the container body. When housed in the lid, the wire end is sandwiched between the container body and the lid, and tension can be continuously applied to the wire fed out from the spool. When the spool is completely stored, the spool is stably held in the container body, and the spool does not move, so that the bonding wire can be stored without being broken. In addition, it is also effective to provide a notch or a convex latching portion at the end of the cover surface on the open side of the container body in order to easily fix the wire end portion between the container body and the lid. .
[0035]
By using the spool case of the present invention, when the bonding wire in use is stored, the wire end fixing operation with a tape or the like is not necessary, and an accident such as damage to the bonding wire or dropping during the operation is eliminated. It becomes possible to prevent.
[0036]
【The invention's effect】
The spool case of the present invention does not require an engaging part or a gripping part on the container main body or lid as a means for holding the spool. There is no need for a wire end fixing operation with tape etc. when using a bonding wire while using a bonding wire. It has the effect of preventing accidents that occur when it gets entangled or collapses.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a container body according to an embodiment of the present invention.
FIG. 2 is a perspective view showing a lid according to an embodiment of the present invention.
3 is a perspective view showing a state in which a spool is held by the container main body shown in FIG. 1. FIG.
4 is a perspective view showing a state in which the container main body shown in FIG. 1 is housed in the lid shown in FIG. 2;
FIG. 5 is a perspective view showing a container body according to another embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1, 10 Container main body 1a, 1b, 10a, 10b Side plate 1c, 10c Guide surface 2 Lid 2a Escape part 3 Spool 3a Flange surface 4 Bonding wire 5 Open surface 6, 7 Opening part 10e Protrusion

Claims (6)

This is a bonding wire spool case that includes a container body that can be elastically deformed and a lid, and that accommodates a spool. The lid is a box-like shape that is open at one end. The lid body dimension in a direction that is uniform and perpendicular to the axial direction of the spool to be accommodated is narrow at the bottom and wide at the open top, and the container body covers the two flanges of the holding spool over an arc. A cover surface with a U-shaped cross section whose end extends in a flat shape and two side plates that are in contact with a part of each flange surface of the holding spool and do not block the hole of the spool are integrated. The container body is configured so that the outer peripheral end of the flange of the spool is in contact with the inside of the cover surface of the container body, and the spool can be held inside with the cover surface compressed from both sides. An outer shape which can be housed in the spool case bonding wires, characterized in that the open end of the cover surface of the container body of the free state is increased. A spool case that accommodates a bonding wire spool having a pair of circular flange surfaces and an outer peripheral portion between the flange surfaces, and includes a container body and a lid body that accommodates the container body. A cover surface comprising an arc-shaped portion in contact with a part of the outer peripheral portion of the spool along the circumferential direction and a pair of width surface portions extending in a planar shape so as to spread from the arc-shaped portion, along the edge of the cover surface And a pair of side plates that are continuous with a predetermined width in a direction orthogonal to the cover surface, the pair of side plates being in contact with a part of the flange surface of the spool along the arcuate portion and a center hole of the flange surface The lid is composed of a pair of side plates in contact with the side surface of the container body and a width plate connecting the side plates, and the side plate and the width plate open an opening. The width plate is formed in the container When the body is accommodated so that the tip of the cover surface slides along the guide surface when the body is accommodated from the opening, the distance between the tips of the cover surface is A spool case for a bonding wire, wherein the container body is fixed to the lid by the elasticity of the container body. The relief part is formed in the edge part shape of the opening part of the said cover body so that the side plate of the container main body accommodated in the said cover body can be hold | gripped. Spool case for bonding wire. The spool of the container main body has one or more protrusions that contact the outer peripheral end of the flange of the spool in a state where the spool is gripped, and can stably accommodate the spool. The spool case for bonding wires according to any one of 1 to 3. The end portion of the bonding wire is dimensioned so that it can be held and fixed between the cover surface of the container body and the inside of the lid body when the container body is stored in the lid body. The spool case for bonding wires according to any one of claims 1 to 4. A method for storing a bonding wire using the bonding wire spool case according to claim 1.

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