JPH11278568A - Spool case for bonding wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To firmly fix a spool, to easily attach / detach the spool, to prevent the winding position from being shifted due to vibration, etc., and to prevent the finger from touching the bonding wire with a fingertip. Provide a case. SOLUTION: This is a spool case composed of a container body 1 for accommodating a cylindrical spool around which a bonding wire is wound, and a lid body fitted to the container body 1 for accommodating the spool 3 in the container body 1. The spool case for a bonding wire in which the concave portion 2a is formed and the axial direction of the spool 3 is stored horizontally with respect to the container body 1. Further, in the above configuration, concave fitting portions 2b are formed at both ends of the concave portion 2a formed in the container body 1, and the concave fitting portion 2b has a substantially arc-shaped cross section perpendicular to the axial direction of the spool 3, and A spool case for a bonding wire adapted to be fitted to the flange 4 of the spool 3. One case may house a plurality of spools.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a spool case for a bonding wire for a semiconductor or a superconducting element.

[0002]

2. Description of the Related Art Conventionally, as a container for accommodating a spool for a bonding wire, a synthetic resin container body integrally provided with an upwardly bulging fitting ridge for fitting a cylindrical spool, and an outer edge of the container body 2. Description of the Related Art A spool case having a lid fitted to a peripheral wall ridge is known (for example, Japanese Utility Model Laid-Open No.
No. 4-103747). In this spool case, the fitting ridge in the container body is formed in a gentle truncated cone shape, so that the spool is firmly adhered to the fitting ridge and fixed.

However, due to manufacturing reasons, the inner diameter of the spool may vary. According to the above structure,
If the spool diameter is too large, the engagement with the inner circumferential surface of the spool is insufficient, and the spool is not fixed to the spool case.

On the other hand, if the diameter of the spool is too small, the inner peripheral surface of the spool and the fitting ridge come into close contact with each other over a wide area, and it is difficult to remove the spool when taking it out. In addition, if you try to pull it out with a strong force, the bonding wire wound on the outer peripheral surface of the spool may accidentally come into contact with the outer peripheral wall ridge of the container main body, or the flange will be supported by the belly of your finger and the fingertip will be wound. In some cases, it may be located near the bonding wire, and may be inadvertently touched with a fingertip, which causes a problem such as damage to the bonding wire.

In the above-mentioned spool case, since the spool is placed vertically, if the bonding wire is loosely wound, it is loosened due to vibration or the like, and the wound position is shifted.
There was a problem that the wire was bent or disconnected during bonding.

[0006]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a method for fixing a spool firmly, making it easy to attach / detach the spool, preventing the winding position from being shifted due to vibration or the like, and furthermore, there is a possibility of touching the bonding wire with a fingertip. The purpose of the present invention is to provide a spool case for a bonding wire.

[0007]

A spool case for a bonding wire according to the present invention for solving the above-mentioned object, comprises:
(1) A spool case including a container main body for housing a cylindrical spool around which a bonding wire is wound, and a lid body fitted to the container main body, wherein the container main body is formed with a concave portion for housing the spool. The spool is housed such that the axial direction of the spool is horizontal to the container body.

(2) Further, in the configuration of the above (1), furthermore, concave fitting portions are formed at both ends of the concave portion formed in the container body, and the concave fitting portion has a cross section perpendicular to the axial direction of the spool. It is arc-shaped and is adapted to be fitted to a flange of a spool.

(3) In the configuration of (2), the connection surface between the concave portion and the concave fitting portion is further rounded off.

(4) Incidentally, one of the spool cases for the bonding wire having any one of the above-mentioned structures may contain one or more spools.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the bonding wire spool case of the present invention, the spool is stored with its axial direction being horizontal to the container, that is, stored horizontally, so that the spool is stored vertically. The winding position does not shift due to the action of gravity, and the bending or disconnection of the wire during bonding is prevented.

Further, since the fingertip is located outside the spool when removing the spool from the spool case, there is no possibility that the fingertip touches the bonding wire.

In addition, by forming a concave fitting portion having a substantially arc-shaped cross section perpendicular to the spool axis direction at both ends of the concave portion for storing the spool, the fitting of the spool flange and the spool case becomes firm.

The cross-sectional shape of the concave fitting portion is not made to be a complete arc having the same radius as the flange radius. It is more preferable to fit them in only four places because they have both firm fixing and easy detachment.

The depth of the concave fitting portion is suitably such that 1/2 to 2/3 of the entire spool can be accommodated in the container body in consideration of the ease of gripping with a finger when taking out. Of course, the depth is set so that the bonding wire wound on the spool does not contact the container body.

The connecting surface between the concave portion and the concave fitting portion is preferably rounded. Then the space between the part around which the bonding wire is wound and the container body will be wider,
The possibility of contact between the bonding wire and the spool case when attaching and detaching the spool is further reduced.

The length of the concave fitting portion in the axial direction of the spool is made slightly larger than the outer dimension of the spool, so that the spool can be easily attached and detached. Furthermore, if the end of the bonding wire wound on the spool is taped outside the spool via a notch, if there is a space between the container body and the spool, the wire outside the spool will break due to contact. Is prevented. Therefore, the length of the recessed portion in the spool axial direction is slightly larger than the outer dimension of the spool, and is desirably larger by about 1 to 5 mm.

The spool case of the present invention is not limited to the one that accommodates one spool, but may be configured to accommodate a plurality of spools simultaneously in one spool case. This can reduce the packaging cost per spool.

The shape of the lid of the spool case of the present invention is not particularly limited as long as it does not come into contact with the bonding wire wound on the spool in a state fitted to the container body. In order to prevent the lid and the bonding wire from coming into contact with each other when the lid is attached or detached, it is desirable that the projections and the like are removed as much as possible, and that the lid has a wide space between the lid and the container body.

For the container body and lid, for example, synthetic resin can be selected as the material.

[0021]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of the spool case of the present invention. The spool case includes a molded container main body 1 and a lid (not particularly shown) fitted thereto. The container body 1 has a concave portion 2a at the center and concave fitting portions 2b at both ends. The concave portion 2a is deeper than the concave fitting portion 2b, and prevents the container body 1 from coming into contact with the bonding wire 5 when the spool 3 is attached or detached. By attaching the flange 4 of the spool 3 to the concave fitting portion 2b, the spool 3 is tightly fixed to the container main body 1 and firmly fixed thereto.

Next, the risk of damage to the bonding wire when the spool is taken out of the conventional spool case and the spool case of the present invention will be described. FIG.
It is explanatory drawing at the time of taking out the spool 3 from the conventional spool case. When taking out the spool 3 from the spool case of the conventional vertical spool type, the fingertip may be inadvertently touched with the bonding wire 5 because the fingertip is located immediately near the wound bonding wire 5.

On the other hand, in the spool case of the present invention, FIG.
As shown in the figure, the fingertip when removing the spool is spool 3
, The possibility of touching the bonding wire 5 is small. Therefore, according to the present invention, the risk of damage to the bonding wire when the spool is taken out can be significantly reduced.

FIG. 4 shows an embodiment in which four spools are accommodated in one spool case.

[0025]

As described above, the spool case for a bonding wire according to the present invention can firmly fix the spool, can easily attach and detach the spool, can prevent the winding position from being shifted due to vibration, etc. There is no fear of touching.

[Brief description of the drawings]

FIG. 1 is a front view of one embodiment of the present invention.

FIG. 2 is an explanatory view of taking out a spool from a conventional spool case.

FIG. 3 is an explanatory view of taking out a spool from a spool case of the present invention.

FIG. 4 is a diagram showing another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Container main body 2a Concave part 2b Concave fitting part 3 Spool 4 Flange 5 Bonding wire

Claims (4)

[Claims] 1. A spool case comprising a container body for accommodating a cylindrical spool wound with a bonding wire and a lid fitted to the container body, wherein the container body accommodates a spool. A spool case for a bonding wire, wherein a recess is formed and the spool is housed so that the axial direction of the spool is horizontal to the container body. 2. A concave portion formed at both ends of a concave portion formed in a container main body, wherein the concave fit portion has a substantially arc-shaped cross section perpendicular to the axial direction of a spool, and has a substantially circular arc shape. The spool case for a bonding wire according to claim 1, wherein the spool case is fitted. 3. The bonding wire spool case according to claim 2, wherein a connection surface between the concave portion and the concave fitting portion is rounded. 4. The bonding wire spool case according to claim 1, wherein a plurality of spools can be stored in one container body.