JPH0140195Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a magazine supply/stock device, and more specifically, the present invention is a device provided in a lead frame supply section and a lead frame accommodating section of a so-called die bonding device, etc., and which stores a plurality of lead frames. This invention relates to a magazine supply/stock device configured to be able to set a plurality of magazines at one time.

Semiconductor devices such as ICs, LSIs, and transistors are
A semiconductor chip (also called a die) with a predetermined circuit formed on a silicon substrate is bonded to a predetermined position on a lead frame (dice bonding), and wire bonding is performed to connect the terminal pads of the chip and the leads. After the chip part is mounted with resin, the lead frame is divided into parts for each device, and the final product is finished with a product with a predetermined number of lead wires protruding from the side of the resin mount part. Go through the process.

In the device for performing die bonding or wire bonding described above, as shown in Fig. 1, multiple lead frames are stacked vertically in order to continuously feed and accommodate the lead frames to a predetermined bonding position. It uses a magazine that can be stored in That is, a magazine table that can be moved vertically is provided at the start and end points of the lead frame transport path of the bonding device, and for example, when sending lead frames to a bonding position, a magazine filled with lead frames before bonding is read. The frame is set on a magazine stand at the starting point of the frame conveyance path, and the lead frames are sequentially sent out onto the conveyance path while the magazine stand is moved up by pitches corresponding to the top and bottom pitches of the lead frames filled in the magazine. . On the other hand, an empty magazine is set on the magazine stand at the end of the conveyance path, and as it is moved up one pitch at a time, the bonded lead frames sent from the conveyance path are sequentially loaded. Store in layers. When the magazine filled with lead frames before processing becomes empty, the operator removes the empty magazine and sets a new magazine filled with lead frames on the magazine stand. In this way,
The operator can leave the bonding equipment and work on other equipment until the unprocessed lead frames stored in the magazine are used up or the empty magazines are filled with processed lead frames. , one operator can be in charge of multiple devices.

However, in the above case, even if the number of devices that one operator can handle can be increased to some extent by increasing the number of lead frames that can be stored in the magazine at one time,
Since only one magazine can be set on the magazine stand, there is a limit to further increasing the number of magazines an operator can handle.Also, since the machine must be stopped while the magazine is replaced, the machine itself It is clear that the efficiency of

This invention was devised in view of the above,
The purpose is to increase the number of magazines that can be set on the magazine stand provided at the start and/or end point of the lead frame transport path of a die bonding machine, etc., thereby increasing the efficiency of the die bonding machine itself and reducing the burden on one operator. The goal is to dramatically increase the number of devices that can be handled.

In order to achieve this purpose, in this invention,
The following technical measures have been taken:

That is, a fixed magazine supply table is provided which can place a plurality of magazines side by side and has a means for elastically pressing these magazines in one direction, and the magazine supply table has a fixed position with respect to the magazine supply table. Provided with a magazine stock stand that has a height difference of
and moving one magazine at the end of the magazine supply stand in the vertical direction, placing the moved magazine on the magazine stock stand, and after placing the magazine on the stock stand, loading the magazine on the magazine supply stand. A magazine platform is provided which is movable laterally and vertically so as to be able to return to the end of the magazine.

Similar to the conventional magazine table described above, the magazine table in the above configuration moves one pitch at a time in the vertical direction at the starting point of the lead frame conveyance path of a bonding device, etc., and sequentially sends unprocessed lead frames to the lead frame conveyance path. ,
Alternatively, at the end point of the conveyance path, an operation is performed to sequentially accommodate the processed lead frames inside. Briefly, the magazine supply/stock device according to the present invention is as described above.
This system has an additional function of automatically sequentially supplying magazines to a magazine table that moves up and down, and automatically storing the magazine after the lead frame has been sent out or stored.

Thus, it is possible to store multiple pieces on the magazine feed stand, e.g.
If 10 magazines are set and the capacity to store lead frames in the magazines is the same as before, the bonding device will operate continuously for 10 times longer than before. I can do it. Therefore, the number of devices that an operator can handle can be dramatically increased, and as a result, the efficiency of manufacturing semiconductor devices can be dramatically increased.

Embodiments of the present invention will be specifically described below with reference to the drawings.

FIG. 2 is a schematic configuration diagram showing a simplified configuration of the present invention.

This configuration will be described assuming that it is attached to the end point of the lead frame conveyance path of the bonding apparatus described above.

In the figure, reference numeral 1 indicates a magazine supply stand on which a plurality of empty magazines 2 can be set side by side. For example, as shown in FIG. 1 or 3, the magazine 2 is long in the height direction and rectangular in plan view, and has a substantially rectangular parallelepiped appearance with open front and rear walls. On the inner surfaces of the left and right side walls, locking pieces 4 capable of locking a plurality of lead frames 3 in a vertically laminated manner are provided at equal intervals in the vertical direction. That is, the plan view shape of the magazines 2 corresponds to the plan view shape of the lead frames 3 to be stored therein, and the height depends on the number of lead frames to be stacked and stored. Further, this magazine supply stand is provided with a spring 20, such as a compression coil spring, for elastically pushing the rear end of the magazines 2 arranged side by side.

A magazine stock stand 5 is arranged so as to be adjacent to the front end 1a of the magazine supply stand 1 and with a certain height difference therebetween, that is, preferably, a height difference slightly larger than the height of the magazines 2. It is set up. Since the upper surfaces of the magazine supply table 1 and the magazine stock table 5 are horizontal and the magazine slides thereon, it is preferable to minimize the frictional resistance against the bottom surface of the magazine.

In the figure, reference numeral 6 denotes a magazine having a function of intermittently moving the magazines 2 sequentially located at the front end of the magazine supply table 1 up one pitch at a time and sequentially transferring them onto the magazine stock table 5. Show the stand. That is, this magazine stand 6 is arranged in the magazine arrangement direction (X direction in FIG. 2) and in the vertical direction (second direction) as shown by the arrow in FIG.
It is configured to be able to move in the Z direction in the figure.
As a means for making the magazine stand 6 movable in this way, for example, the magazine stand 6 may be moved relative to a fixed member by combining a known feeding device such as a feed screw device or a fluid pressure cylinder. What is necessary is to make it possible to move in the X direction and the Z direction. In this embodiment, the vertical shaft 8 is made axially movable by a Z-direction feed device 7 attached to a suitable fixed member, and an X-direction feed device fixed to the upper end of this vertical shaft 8 is provided. 9, a horizontal shaft 10 extending in the X direction, to which the magazine stand 6 is fixed, is movable in the axial direction.

The planar positional relationship among the magazine stand 6, magazine supply stand 1, magazine stock stand 5, and lead frame transport path 11 is shown in FIG.

That is, the magazine supply stand 1 and the magazine stock stand 5 both occupy a certain space 12a, 12b.
The magazine stand 6 is formed by a pair of parallel plates extending in the magazine traveling direction, that is, the X direction, and is movable in the X direction and the Z direction.
are positioned so as to fit into the spaces 12a and 12b. Further, as clearly shown in FIG. 3, a pair of rods 13 are protruded from the front end of the upper surface of the magazine stand 6. This rod 13 supports the magazine placed on the top surface of the magazine stand 6 so that it does not fall sideways, and also pushes the magazine placed first on the magazine stock stand 5 in the direction X in FIG. It serves to free up space for the next magazine to rise. Furthermore, the lead frame conveyance path 11 is arranged to increase the height of the uppermost locking piece 4a of the magazine 2 located at the front end of the magazine supply table 1, that is, the magazine 2 that is about to be lifted by the magazine table 6. In this position, it extends in the direction perpendicular to the plane of the paper in FIG. 2, that is, in the Y direction in FIG.

Next, the operation of the apparatus of this embodiment will be explained.

As shown in FIG. 2, a plurality of magazines 2 are set on the magazine supply table 1 in a line with their long sides facing each other. These magazines 2... are always urged forward by a spring 20 provided at the rearmost part thereof, so that the magazine 2 at the frontmost part is placed on the magazine stand 6 and attached to the rod 13. It is placed so that it can be pressed. This example shows what should be provided at the end of the lead frame transport path, so
The magazines 2 placed on the magazine supply table 1 to the magazine table 6 are empty magazines. Next, the Z direction feeding device is driven, and the magazine table 6 is intermittently moved upward one pitch at a time in the Z direction in FIG. 2, that is, as indicated by the arrow in FIG. Here, one pitch corresponds to the vertical interval between the lead frame supporting locking pieces 4 formed inside the magazine 2. Further, the time interval of the intermittent feeding is synchronized with the length of the lead frame conveyed on the lead frame conveyance path 11 and its conveyance speed, and the lead frames 3 continuously conveyed on the conveyance path are kept in the magazine 2. The locking pieces 4 are determined to be stored in order from top to bottom. As described above, the locking piece 4 in the magazine 2
When all of the lead frames 3 are filled, the magazine stand 6 moves upward a little further, and its upper surface almost coincides with the upper surface of the magazine stock stand 5, as shown by the imaginary line in FIG. Specifically, it is positioned slightly above the top surface of the magazine stock stand. Here, the Z direction feeding device 7 is temporarily stopped, and then the X direction feeding device 9 is driven, and the magazine stand 6 is moved in the X direction in FIG. 2, that is, almost in the direction of the arrow in FIG. is moved a distance corresponding to the width of At this time, the rod 13 protruding from the front end of the upper surface of the magazine stand 6 pushes the magazine 2 already placed on the magazine stock stand 5 forward. Next, the Z-direction feeding device 7 is driven again, and the magazine table 6 is lowered as indicated by the arrow in FIG. At this time, the magazine 2 placed on the magazine stand 6 is placed on the magazine stock stand 5. Next, the X-direction feeding device is driven again, and the magazine table 6 is moved in the direction of the arrow in FIG. 2 and returned to the initial position.
Thereafter, the same operation as above is repeated until there are no more magazines 2 on the magazine supply table 1.

It goes without saying that the scope of the present invention is not limited to the embodiments shown in the drawings.

That is, in the illustrated example, by moving the magazine stand up one pitch at a time, the lead frames are sequentially stored inside the magazine mounted on the magazine from top to bottom, but in contrast to this, It is also possible to store the lead frames in order from the bottom to the top inside the magazines placed on the magazine stand when it is lowered.

Further, although the illustrated example has been described as being installed at the end point of the lead frame transport path, it is substantially the same even if it is installed at the start point of the lead frame transport path.
That is, in this case, the magazine set on the magazine supply table 1 is filled with lead frames to be sent onto the lead frame transport path. However, in this case, each time the magazine stand moves upward intermittently, it is necessary for a pushing means such as a push rod to feed the lead frame onto the lead frame from the rear of the magazine.
Further, empty magazines are sequentially stored on the magazine storage stand.

As described above, the magazine feeding/stocking device of the present invention can set a large number of magazines at once, so the bonding device can be operated continuously for a long time, and the operator can take charge of the bonding device. It has the unique effect of being able to increase the number of units. This greatly contributes to reducing the manufacturing cost of semiconductor devices.

[Brief explanation of drawings]

FIG. 1 is a perspective view for explaining the outline of a conventional example, and FIG. 2 is a schematic configuration diagram of an embodiment of the present invention.
FIG. 3 is a perspective view for explaining the main parts of the example shown in FIG. 2. 1...Magazine supply stand, 2...Magazine, 5...
...Magazine stock stand, 6...Magazine stand.

Claims (1)

[Scope of utility model registration request] Multiple magazines can be placed side by side,
and a fixed magazine supply table having a means for elastically pressing these magazines in one direction, and a magazine that has a certain height with respect to the magazine supply table and can place a plurality of magazines side by side. vertically moving a stock stand and one magazine at the end of the magazine supply stand; placing the moved magazine on the magazine stock stand; and after placing the magazine on the stock stand; 1. A magazine feeding and stocking device, characterized in that it has a magazine platform which can be moved laterally and vertically so as to be able to return to the end of the magazine feeding platform.