Material or article handling – Device for emptying portable receptacle – With jarring means
Patent
1993-07-29
1997-07-08
Underwood, Donald W.
Material or article handling
Device for emptying portable receptacle
With jarring means
414900, 414926, 2941191, 269227, 269153, 269 43, 269 13, B65B 6900
Patent
active
056453930
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to an IC stocker, an IC unloading and positioning apparatus, and an IC feed system. (The Abbreviation IC, used herein, is a well known indication for an integrated circuit.) More particularly, the present invention relates to an IC stocker for a series of ICs connected with a leadframe, and to an IC unloading and positioning apparatus capable of unloading ICs from the stocker and of positioning them in the center of a transfer path or in the center of a processing position to make preparations for a subsequent step of the process regardless of the configuration and size of ICs. The present invention also relates to an IC feed system incorporating the IC stocker and the IC unloading and positioning apparatus.
BACKGROUND ART
After IC chips have been completed through various manufacturing processes, they are further subjected to processing steps. When leadframes are used, the processing steps are roughly as follows: bonding of a chip to a leadframe, i.e., chip bonding, wiring between the chip and the leadframe, i.e., wire bonding, coating of the chip with a plastic or other similar material for protection, i.e., plastic molding, marking of the casing, and press working, e.g., bending and cutting of the leadframe.
These processing steps are carried out in such a manner that the chips are sequentially transferred to the successive processing steps, and after each chip has been positioned in a processing apparatus provided for each step, necessary processing is performed on the chip. In the meantime, leadframes and packages vary in size and configuration according to specifications. It is necessary in order to continuously carry out the above-described processing steps to set each IC under processing in a desired position during transfer or in a processing apparatus. For this reason, it is possible to use only processing apparatuses which are conformable to the size specifications of leadframes and packages.
To use processing apparatuses in common with respect to various specifications, it is common practice to use a cassette for storing a stack of ICs, a stocker for storing cassettes, a transfer jig, an assembling jig, etc. However, IC leadframes or packages vary in specifications of configuration, size, etc. according to the kind of IC. Accordingly, it is necessary to prepare a number of different kinds of cassette, transfer jig, assembling jig, etc. which corresponds to the number of different kinds of IC to be processed. In addition, if there is a change in lot during manufacture, setup time is needed for changing each of the above-described jigs for each lot.
DISCLOSURE OF THE INVENTION
The present invention has been made with the technical background detailed above, and it aims at attaining the following objects.
It is an object of the present invention to provide an IC stocker, an IC unloading and positioning apparatus, and an IC feed system, which are designed so that setup time for positioning is minimized in the process of manufacturing ICs with leadframes.
It is another object of the present invention to provide an IC stocker, an IC unloading and positioning apparatus, and an IC feed system, which can readily be applied to an existing processing apparatus without modification to feed and transfer ICs.
According to the present invention, a large number of ICs which vary in size and configuration can be efficiently positioned and centered when they are stocked and transferred. Therefore, it is unnecessary to prepare a transfer jig, an assembling jig, etc. for each IC lot.
To solve the above-described problems, the present invention adopts the following means.
The IC stocker comprises:
a moving table for moving on a frame;
means for driving the moving table to move to a desired position on the frame, thereby positioning the moving table;
a cassette for stocking a stack of a plurality of ICs, the cassette being loaded on the moving table;
a plurality of first and second vertical plates for holding the cassette therebetween;
first connecting means for c
REFERENCES:
patent: 3410421 (1968-11-01), Groll
patent: 4938655 (1990-07-01), Asano
patent: 5127695 (1992-07-01), Zoeten
Ishii Tool & Engineering Corporation
Underwood Donald W.
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