JPH06140443A - Lead frame feeder - Google Patents

Abstract

PURPOSE:To surely supply lead frames one by one. CONSTITUTION:A pressing piece 61 is installed so as to face the short side surface of the uppermost lead frame 1 accommodated in a stocker 21. The surface of the comber which surface faces the lead frame is constituted as a 45 deg. downward slat surface. The pressing piece 61 is moved forward by an air cyllinder 62, and the lead frame 1 is bent upward. Thereby mutual adhesion of the lead frames 1 is released.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lead frame feeder for feeding lead frames one by one.

[0002]

2. Description of the Related Art In a pellet bonding apparatus used in, for example, a semiconductor manufacturing process, the lead frames stacked in a stocker are raised in pitch, and the uppermost lead frames are sequentially taken out by a pick-up means such as a suction nozzle and guided. A supply device for supplying the rail is provided.

[0003]

However, in the conventional feeding device, the lead frames located above and below are in close contact with each other due to the surface treatment applied to the lead frames or the entanglement of the leads. It has a drawback that the above lead frame is taken out.

An object of the present invention is to provide a lead frame supply device capable of surely separating and supplying lead frames one by one.

[0005]

According to the present invention, there is provided a lead frame supply having a stocker for accommodating and accommodating lead frames in a stack, and a take-out means for taking out the lead frames one by one from above the stocker. The apparatus is provided with pressing means that face each other across the stocker and press the lead frame located above in the stocker in a plane direction to cause the lead frame to bend and deform. And

According to a second aspect of the present invention, in the lead frame supply device according to the first aspect, the pressing means has a pressing piece whose facing surface facing the lead frame is a downward inclined surface, and the pressing piece. Drive means for moving in the lead frame direction.

According to a third aspect of the present invention, in the lead frame supplying apparatus according to the first or second aspect, the pressing means is provided so as to face the short side surface of the lead frames stacked and stored in the stocker. It is characterized by

[0008]

According to the present invention, the lead frame located above the stocker is flexibly deformed by the operation of the pressing means, and the close contact between the lead frames is released.

[0009]

Embodiments of the present invention will be described with reference to the drawings. 1 is a front view of a lead frame supply device according to an embodiment of the present invention, FIG. 2 is a plan view of FIG. 1, FIG. 3 is an operation state diagram of FIG. 1, and FIG. 4 is a plan view of the lead frame supply device of FIG. FIG. 3 is a front view of the pellet bonding apparatus that has been used.

First, the pellet bonding apparatus will be described with reference to FIG. The pellet bonding apparatus 10 shown here includes a supply device 20, a transfer device 30, a bonding device 40, and a storage device 50 for the lead frame 1.
Have.

The supply device 20 supplies the lead frames 1 one by one, and has a stocker 21 for accommodating the lead frames 1 in a stacked state and a take-out means 22 equipped with a suction nozzle, as will be described later.

The transfer device 30 intermittently transfers the lead frames 1 sequentially supplied one by one by the take-out means 22 of the supply device 20 along a transfer rail 31 by a pitch feed means (not shown).

The bonding apparatus 40 includes a movable base 41 that moves in the carrying direction of the lead frame 1, and the movable base 41.
And a bonding arm 43 supported by the bonding head 42 and movable up and down and in a direction orthogonal to the transport direction of the lead frame 1. The suction nozzle 44 is mounted.

The storage device 50 has a magazine 51 for storing the lead frame 1 in a shelf shape, and a vertical movement device 52 for the magazine 51.

Therefore, this pellet bonding apparatus 10
In FIG. 3, the uppermost lead frame 1 stacked and stored in the stocker 21 is sucked and held by the take-out means 22 and supplied to the transport rail 31. Therefore, the lead frame 1 is intermittently transported along the transport rail 31 by a pitch feeding means (not shown) and positioned at the bonding position. Here, a semiconductor pellet (not shown) is bonded onto the lead frame 1. This bonding operation is performed by suction-holding the semiconductor pellets by the suction nozzle 44 and then appropriately moving the moving table 41 and the bonding arm 43 according to the bonding position on the lead frame 1. The bonded lead frame 1 is again conveyed to the downstream side by a pitch feed means (not shown), and is housed in the magazine 51 positioned at a predetermined height by the vertical movement device 52.

Next, the supply device 20 used here will be described with reference to FIGS. 1 to 3. In the figure, a stocker 21 includes a first stopper 23A and a second stopper 23A that come into contact with the pair of short side surfaces of the lead frame 1 in a stacked state.
The stopper 23B, and a third stopper 23C and a fourth stopper 23 that respectively come into contact with the long side surface of the lead frame 1.
D and the four stoppers 23A to 23D form a storage space 24 for the lead frame 1.
The second stopper 23B is held by a moving block 26 whose position is adjusted in the longitudinal direction of the lead frame 1 along the guide rail 25, and the side surface of the lead frame 1 located above the storage space 24 is directed toward the first stopper 23A. And the third and fourth stoppers 23C and 23D are respectively held by moving blocks (not shown) whose position is adjusted in the width direction of the lead frame 1, so that the stocker is moved. The size of the housing space 24 is adjusted according to the size of the lead frame 1 housed in the housing 21.

A support 27 is provided below the storage space 24.
Is provided and can be moved up and down by an elevating means (not shown).

A detector 28 is provided near the upper end of the fourth stopper 23D. This detector 28 is used in the stocker 2
It detects that the uppermost lead frame 1 in 1 is positioned at the take-out level. The ascending / descending movement of the support base 27 and the operation of the take-out means 22 are based on the signal of this detector 28, and a control device (not shown). It is controlled by.

The pressing device 6 is provided so as to face the pair of short side surfaces of the lead frame 1 housed in the housing space 24.
0 is provided. Each pressing device 60 includes a pressing piece 61.
And an air cylinder 62 for moving the pressing piece 61 back and forth in the storage space 24. The pressing piece 61 has a surface facing the lead frame 1 that is a downwardly inclined surface of 45 degrees,
Silicon rubber 63 is attached along the inclined surface. The pressing device 60 on the right side in the drawing is fixedly supported by the bracket 64 attached to the first stopper 23A, and the pressing device 60 on the left side in the drawing mounts the bracket 65 on the moving block 26 on which the second stopper 23B is supported. It is fixedly supported via. The supporting height of each pressing device 60 is the same as the pressing piece 6
The central portion in the height direction of the inclined surface of 1 is the storage space 24.
So that it faces the side surface of the uppermost lead frame 1 of
Further, the support position in the left-right direction is a position where the pressing piece 61 presses the uppermost lead frame 1 in the storage space 25 and abuts on the upper end of the second lead frame 1 when the air cylinder 62 has the maximum stroke. Is adjusted to.

Next, the operation of the supply device 20 will be described.

First, the size of the storage space 24 is set according to the size of the lead frame 1 to be supplied. This setting is performed by adjusting the positions of the second to fourth stoppers 23B to 23D via the moving block 26 or a moving block (not shown). Next, the lead frame 1 is stacked and stored in the stocker 21 with the support base 27 positioned below, and then the support base 27 is raised. This rise stops when the detector 28 detects the uppermost lead frame 1. At this time, the air cylinder 62 operates, and the pressing piece 61 moves forward as shown in FIG. As a result, the uppermost lead frame 1 in the stocker 21 is pressed by the pressing piece 6
It is pressed from both short sides by 1 and bends upward. After that, the pressing piece 61 is moved backward by the operation of the air cylinder 62. Then, the take-out means 22 moves up and down on the stocker 21, sucks and holds the uppermost lead frame 1 and carries it to the carrying rail 31.

When the uppermost lead frame 1 is taken out by the take-out means 22 in this way, the support base 27 is raised and the entire lead frame 1 in the storage space 24 is raised. Then, the raising of the support base 27 is stopped when the detector 28 detects the uppermost lead frame 1, and the same operation is repeated thereafter.

According to the above-described embodiment, since the uppermost lead frame 1 in the stocker 24 is bent by the forward movement of both pressing pieces 61, this bending causes the lead frames 1 to be in close contact with each other. It is possible to separate and supply the lead frames 1 one by one with certainty.

Further, since the pressing piece 61 presses the short side surface of the lead frame 1, the lead frame 1 can be bent without difficulty as compared with the case of pressing the long side surface. It is also possible to prevent the lead frame 1 from being bent and deformed by the bending.

Further, the second stopper 23B and the pressing device 6
Since 0 is supported by the same moving block 26,
The second stopper 23 according to the size of the lead frame 1
When the position of B is adjusted, the position of the pressing device 60 can be adjusted at the same time, so that it is possible to easily cope with a change in the type of the lead frame 1 in a short time.

In the above embodiment, the silicon rubber 63 is attached to the inclined surface of the pressing piece 61, but it does not cause slipping or scratching when it comes into contact with the lead frame 1 and is made of a material having an appropriate hardness. Others may be used if they are present.

Although the pair of pressing devices 60 are arranged with the stocker 21 interposed therebetween, the pressing device 60 is arranged only facing one short side surface of the lead frame 1.
The contact plate of the lead frame 1 may be provided so as to face the other side surface on the short side, and the lead frame 1 may be curved by pressing the lead frame 1 against the contact plate by the forward movement of the pressing piece 61.

Further, in the embodiment, only the uppermost lead frame 1 is pressed, but a plurality of lead frames 1 may be pressed at the same time so as to separate the close contact of each lead frame. The same effect as can be obtained.

[0029]

According to the present invention, the lead frames can be reliably separated and supplied one by one.

[Brief description of drawings]

FIG. 1 is a front view of a lead frame supply device that is an embodiment of the present invention.

FIG. 2 is a plan view of FIG.

3 is an operation state diagram of FIG. 1. FIG.

4 is a front view of a pellet bonding apparatus using the lead frame supply device of FIG.

[Description of Reference Signs] 1 lead frame 20 supply device 21 stocker 22 take-out means 23A first stopper 23B second stopper 23C third stopper 23D fourth stopper 24 storage space 25 guide rail 26 moving block 27 support base 28 detector 60 pressing device 61 Pressing Piece 62 Air Cylinder 63 Silicon Rubber 64 Bracket 65 Bracket

Claims (3)

[Claims] 1. A lead frame supply device comprising a stocker for accommodating and accommodating lead frames in a stack, and a take-out means for taking out the lead frames one by one from above the stocker, facing each other across the stocker. 2. A lead frame supply device, comprising: a pressing unit that presses the lead frame located above in the stocker in a plane direction to cause the lead frame to deform flexibly. 2. The pressing means comprises a pressing piece whose surface facing the lead frame is a downwardly inclined surface, and a driving means for moving the pressing piece in the lead frame direction. 1. The lead frame supply device according to 1. 3. The lead frame supply device according to claim 1, wherein the pressing means is provided so as to face a short side surface of the lead frames stacked and stored in the stocker.