JP2000174038A - Lead frame storage case, and method and equipment for supplying lead frame using the storage case - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lead frame storage case, which can store many lead frames without deformation or entanglement of the lead frames during transfer steps and which can supply the lead frames directly to a die bonder, etc., without once again transferring the lead frames to a special purpose magazine. SOLUTION: A rectangular parallelepiped container is constituted of a bottom plate 10a, having an opening, long side plates 10c each of which has a cutout 11a-11d opened upwards and short side plates each of which has a cutout 12a-12c opened upward. Insertion plates 13, 14, 15 are mounted on the steps of each cutout 11a-11d, 12a-12c and a support plate 16 is mounted on the bottom plate 10a. Only specified lead frames 1 are piled up on each insertion plate 13, 14, 15 and on the support plate 16 to be stored in the container.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is capable of stacking and storing lead frames by a predetermined number of sheets by an insertion plate so that mutual load is not applied to the lead frames. The present invention relates to a lead frame storage case, a lead frame supply method using the same, and a lead frame supply device.

[0002]

2. Description of the Related Art Conventionally, a lead frame used for a semiconductor device has been packaged with a predetermined number of strips of film sheets, or a case body having a cutout 92 on a side face as shown in FIG. The lid 9 is placed in the opening 93 at the top of
A predetermined number (for example, 50) of lead frames 1 with die pad portions 96 are stacked and housed in a lead frame carrier case 90 provided with a lead frame 4, and transported with a band 95 for binding. Then, when the lead frame 1 is supplied to the die bonding device or the like by the lead frame supply device,
After unpacking the film sheet or manually removing the lead frame 1 from the carrier case 90, transferring the lead frame 1 to a dedicated magazine of a lead frame supply device, and then performing a supply operation (see, for example, JP-A-10-84000). .

[0003]

Since the storage, transport, and supply of the lead frame have been performed as described above, the workability when transferring from the lead frame carrier case to the dedicated magazine is poor, and it takes time, so that the throughput is reduced. Was a factor. In addition, this means that the number of lead frames accommodated in the carrier case is usually reduced by 50 in consideration of prevention of entanglement between lead frames and ease of handling.
Because of the number of sheets, the frequency of transfer to a dedicated magazine (usually 200 to 600 sheets) is high, and the workability is poor and a large number of lead frame carrier cases are required. The cost required for transportation and supply was high. Further, there is a problem that the lead frame is likely to be deformed when transferring to a dedicated magazine.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and can be accommodated in a large number of lead frames without causing deformation, and can be supplied again to a dedicated magazine when supplied to a die bonding apparatus or the like. An object of the present invention is to provide an inexpensive lead frame storage case that does not need to be transferred, a lead frame supply method using the same, and a lead frame supply device.

[0005]

A lead frame storage case according to the present invention is a rectangular parallelepiped container having an open upper portion and an opening in a bottom plate, wherein at least a pair of opposed side plates have a predetermined depth from an upper end. A container body having a cutout part whose upper part is opened from the cutout bottom face, an insertion plate on which a protrusion is placed on the cutout bottom face and only a predetermined lead frame is stacked during transport, and placed on the bottom plate Only the specified lead frame is stacked during transport,
When the lead frame is taken out, a support plate for supporting the lead frame and the insertion plate is provided. Further, the side plate has a plurality of cutout portions having different widths and depths, and each cutout portion is sequentially provided immediately below from a wide and shallow depth to a narrow and deep depth. Things.

The side plate has a plurality of notches having different depths, and each notch is provided at a different position along the periphery of the side plate. Further, the insertion plate and the support plate are provided with a die pad accommodating recess or a die pad accommodating opening in which the sink die pad portion of the lead frame is accommodated and positioned. Further, the bottom plate is positioned at a position corresponding to at least two of the positioning holes of the lead frame to be mounted and stored at a predetermined position, with a diameter smaller than the diameter of the positioning hole and substantially reaching the upper end height of the side plate. A rod is erected, and an insertion hole having a diameter larger than that of the locator rod and through which the locator rod is inserted is opened in the insertion plate and the support plate in accordance with the erected position of the locator rod. In addition, at the position where at least the first suction pad is brought into contact with the lead frame in the lead frame removing step, the vacuum is communicated to the atmosphere during the suction operation and the degree of vacuum at the time of suction of the first suction pad is reduced to a value not reaching the set value. The first communication path is provided in the insertion plate. Furthermore, at the position where at least the second suction pad abuts in the lead frame take-out step, the vacuum degree at the time of suction of the second suction pad is reduced to a value not reaching the set value by communicating with the atmosphere during the suction operation. Second
Are provided on the support plate.

According to the lead frame supply method of the present invention, there is provided a rectangular parallelepiped container having an open top and an opening in a bottom plate, wherein at least a pair of opposed side plates have a notch at a predetermined depth from an upper end. A container body having a cutout part whose upper part is opened from the bottom surface, and a plate-like body on which a protrusion is mounted on the cutout bottom surface and only a predetermined lead frame is stacked, and at least a first suction pad And an interposed plate provided with a first communication passage which communicates with the atmosphere during the suction operation and reduces the degree of vacuum at the time of suction of the first suction pad to a value that does not reach the set value. Transporting and setting the provided lead frame storage case to the processing stage unit, and when the degree of vacuum of the first suction pad reaches a set value during the suction operation of the suction pad, the suction target is determined to be a lead frame. When the degree of vacuum of the first suction pad does not reach the set value, the suction target is determined to be an insertion plate and is stored in a collection case. is there.

Further, a plate-like body placed on the bottom plate of the lead frame storage case and having only a predetermined lead frame stacked thereon, and at least in a position where the second suction pad is brought into contact with, is set to the atmosphere during the suction operation. And a support plate having a second communication passage for lowering the degree of vacuum at the time of suction of the second suction pad to a value that does not reach the set value, and supporting the second suction pad during suction operation of the suction pad. When the degree of vacuum does not reach the set value, it is determined that the removal of the lead frame has been completed, and the step of transferring the lead frame storage case from the processing stage unit is included.

A lead frame supply device according to the present invention is a rectangular parallelepiped container having an open upper portion and an opening in a bottom plate, wherein at least a pair of opposed side plates have a notched bottom surface at a predetermined depth from the upper end. A container body having a cutout part whose upper part is opened from above, a plate-like body on which a protrusion is placed on the cutout bottom surface and only a predetermined lead frame is stacked, and the first suction pad is brought into contact therewith. position,
It is placed on an insertion plate and a bottom plate provided with a first communication passage provided with a first communication passage for communicating with the atmosphere during the suction operation and reducing the degree of vacuum at the time of suction of the first suction pad to a value that does not reach a set value, and A lead frame storage case having a support plate on which only a lead frame is stacked, and a suction target that pushes the bottom of the support plate so that the uppermost suction target stored in the lead frame storage case reaches the suction position of the suction pad. A suction device that includes a push-up means, a plurality of suction pads for sucking the object to be sucked, and a first vacuum switch to which a first suction pad is connected; Means, a vacuum supply means for supplying or interrupting vacuum to the suction pad of the suction supply means, a command signal for supplying or shutting off vacuum to the vacuum supply means, and a suction operation of the suction pad. Receiving the signal of the first vacuum switch indicating that the degree of vacuum is equal to or higher than the set value, supplying the object to the conveyance path to the first vacuum switch indicating that the degree of vacuum has not reached the set value And a control means for sending a command signal for storing the object to be adsorbed in the recovery case to the suction supply means in response to the above signal.

[0010] Further, at a position where at least the second suction pad of the plurality of suction pads is in contact with the support plate, the suction plate communicates with the atmosphere at the time of suction operation to reduce the degree of vacuum at the time of suction of the second suction pad. A second communication passage for lowering the suction pressure to a value not reaching the set value; a suction supply unit for the suction target provided with a second vacuum switch to which a second suction pad is connected; A storage case transfer means for transferring the lead frame storage case from the processing stage in response to a transfer command signal transmitted by the control means having received the signal of the second vacuum switch indicating that the degree of vacuum does not reach the set value during operation. It is provided.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 Hereinafter, a lead frame storage case according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing a state in which a lead frame is stored in a lead frame storage case according to Embodiment 1 of the present invention, and FIG. 2 is a bottom view of the lead frame storage case. In the drawings, the same reference numerals indicate the same or equivalent components as those in the conventional example. same as below. The lead frame accommodating case 9 according to the first embodiment is formed of resin, and has a rectangular opening 17 at a central portion, and has a rectangular opening 17 at a constant depth from an upper end and a narrower upper end. Notches 12a, 12b, 1
A pair of short side plates 10b provided with 2c and a pair of long side plates 10c similarly formed and provided with notches 11a, 11b, 11c and 11d are combined to form a rectangular parallelepiped with an open top. A container (not shown) is formed inside the container and supported by respective steps of notches 11a and 12a, 11b and 12b, and 11c and 12c.
Are mounted on the bottom plate 10a, and a resin support plate 16 made of a rectangular flat plate is mounted on the bottom plate 10a. The support plate 16 serves as a support plate for lifting up the entire lead frame 1 when the lead frame 1 is sucked and taken out from the lead frame storage case 9. There is a slight gap between the interposed plates 13, 14, 15 and the support plate 16 and the side plates 10b, 10c, so that the interposed plates 13, 14, 15 and the support plate 16 can be easily taken out. It has become. Lead frame 1
As shown, each of the interposed plates 13, 14, 15 and the support plate 16
A predetermined number of sheets (for example, 50 sheets) are put on the upper part and stored. The upper part 93 of the lead frame storage case 9 is covered with a lid 94 and conveyed while being bound by a band 95.

FIG. 3 is a plan view of an insertion plate and a support plate placed inside the lead frame storage case, and FIG.
FIG. 4 is a cross-sectional view taken along a direction IV-IV in FIG. 3. FIG. 3 (a),
(B) and (c) are views corresponding to the insertion plates 13, 14, and 15, respectively, and FIG. 3 (d) is a view of the support plate. A die pad receiving recess 18 for receiving and positioning a submerged die pad (not shown) which is usually formed by submerging the lead frame 1 by about 200 to 300 μm at the center thereof has a depth h of about 500 to 700 μm during resin molding. An example in which ke is formed is shown.
Further, the protrusions 13a, 13b, 14a, 14b, 1
The shapes and positions of 5a and 15b are shown. The circular portion shown by the dashed line is the suction position of the suction pad 36, and the suction pad 3
6c, the insertion plates 13, 14, 15 and the support plate 16
In any case, so that the predetermined degree of vacuum is not obtained
A communication port 19a communicating with the atmosphere is provided. Therefore, the communication port 1 shifted from the suction pad 36c shown in FIG.
The space 9a communicates with the atmosphere, so that the suction pad 36c cannot have a degree of vacuum higher than the set value. On the other hand, the lead frame 1 does not have such a communication port, and a vacuum degree equal to or higher than the set value can be obtained in all the suction pads. Therefore, depending on the presence or absence of the communication port 19a, whether the adsorbed material is the lead frame 1 or not, the interposed plates 13, 14, 15
Alternatively, it can be determined whether the object is the support plate 16 and the destination of the object to be adsorbed can be specified.

FIG. 5 is a plan view of a typical lead frame, and FIG. 6 is a cross-sectional view of a die pad sinking part viewed in the direction of VI-VI in FIG. That is, the lead frame 1 is configured such that the die pad 3 is supported by the suspension leads 4 between the strip-shaped copper or iron thin frames 2 and the die pad sinking portion 96 is formed, and the leads 5 supported by the support frame 6 on both sides. Is provided. Further, a plurality of semiconductor device forming portions each including a portion including the die pad 3, the suspension lead 4, and the lead 5 on which the semiconductor device is formed as one unit are provided. Reference numeral 7 denotes a positioning hole of the lead frame 1, and reference numeral 8 denotes a feed hole of the lead frame 1 for the next process. FIG. 7 is a cross-sectional view showing a state in which the lead frame is stored in the lead frame storage case.
FIG. 4 is an enlarged view showing a state where the die pad sinking portion is housed and positioned in the die pad housing concave portion of the insertion plate or the support plate. As is clear from the figure, the die pad 4 of the first lead frame 1 is inserted into the interposed plates 13, 14, 15 or the support plate 16.
8 is positioned in the die pad receiving recess 18 (FIG. 8).
Is represented by an insertion plate 13), on which other lead frames 1 are sequentially stacked, so that they do not move and become entangled or deformed in the process of transporting the lead frame storage case 9. In addition, when taking out and supplying from the lead frame storage case 9, it can be easily taken out without causing a positional shift. Further, in the state of being stored in the lead frame storage case 9, each lead frame 1 is stored so as to have a slight gap between the uppermost lead frame 1 and the upper interposed plate 13, 14, or 15. That is, since only the own number of lead frames (for example, 50) is loaded on the insertion plates 13, 14, and 15, a large number of lead frames 1 are stored in one lead frame storage case 9 (this embodiment). Even in the case of the first embodiment, about 200 sheets are stored), but the impact at the time of transportation to each lead frame is small, and the lead frame is prevented from being deformed together with the positioning in the die pad receiving recess 18. The effect is great.

Next, a lead frame supply apparatus using a lead frame storage case according to a first embodiment of the present invention will be described with reference to the drawings. FIG. 9 is a front sectional view of a lead frame supply device showing a supply state of a lead frame,
FIG. 10 is a plan view of the suction pad viewed from above, and FIG.
1 is a partial cross-sectional plan view in the XI-XI direction of FIG.
FIG. 12 is a cross-sectional view as seen in the XII-XII direction of FIG. In FIG. 9, reference numeral 20 denotes a base, a lower base plate 21, an upper base plate 2.
2 and a support column 23 connecting these two base plates 21 and 22. Then, the lead frame storage case 9 is placed so that the opening 17 of the bottom plate 10a comes to the elevating opening 24 formed in the upper base plate 22, and the push-up rod 27 is rotated by the rotation of the drive shaft 26 formed with a ball screw. The lifting plate 24 is guided by the guide bearing 29 and rises, so that the support plate 16 supported by the push-up plate 28 at the tip end.
Is pushed up, and the lead frame 1 and the interposer 1
3, 14, 15 rise toward the upper opening 93 of the lead frame storage case 9. The drive shaft 26 is connected to the lower base plate 2.
1 is supported by a bearing (not shown) in a drive shaft support portion 30 provided on the drive shaft 1, and is driven by an elevating motor 31. The object-to-be-adsorbed pushing-up means 25 includes the drive shaft 26, the push-up rod 27, the push-up plate 28, the guide bearing 29, the drive shaft support 30, and the elevating motor 31.

On the lead frame storage case 9, the suction for transferring the lead frame 1 pushed up by the suctioned object pushing-up means 25 to the rail 32 for supplying to a device (for example, a die bonding device) in the next step. Supply means 34 is arranged. In addition, the insertion plates 13, 14,
When 15 is adsorbed, it is transferred to the collection case 33. Lead frame 1 and insertion plate 13,
14 and 15 are sucked by a suction pad 36 provided at the tip of a pipe 35 connected to a vacuum unit (not shown). As shown in FIG. 10, in the first embodiment, eight suction pads 36 (36 a to 36 h) are provided. A vacuum switch (not shown) is connected to a pipe (not shown) of the suction pads 36c and 36f, and the operation of the suction supply means 34 depends on which vacuum switch has reached the set value of the degree of vacuum. Controlled. The pipe 35 is supported by a support plate 37,
9. Therefore, when the cylinder 38 operates and the rod 39 expands and contracts, the support plate 37 moves up and down, and the position of the suction pad 36 moves up and down integrally. The cylinder 38 is connected to a moving frame 40, and the moving frame 40 is rotatably mounted on a fixed frame 42 fixed (not shown) to the upper base plate 22 of the base 20, and a ball screw is formed. It is movable in the axial direction by the rotating shaft 41 and traverses while sliding along a guide shaft (not shown) provided on the fixed frame 42. The rotating shaft 41 is a moving frame 4
The moving frame 40 is connected to the axis of the traversing motor 43 attached to the
Traverses left and right, the position of the suction pad 36 also traverses integrally, and is moved to the position indicated by the dashed line on the rail 32 or the collection case 33. The suction supply unit 34 includes the pipe 35, the suction pad 36, the support plate 37, the cylinder 38, the rod 39, the moving frame 40, the rotating shaft 41, the fixed frame 42, and the traversing motor 43.

The lead frame storage case 9 from which the lead frame 1 has been taken out is transferred in the direction of arrow B by storage case transfer means (not shown) and reaches a position shown by a dashed line. Exit 4 in plate 22
4 is carried out by a storage case carrying-out means 45 provided in 4. Reference numeral 46 denotes a carry-out rotary belt, which is driven by rotation of a drive roller 47 rotatably supported by bearings 48, 49 attached to the upper base plate 22. The drive roller 47 is connected to a carry-out drive motor 50 via a gear device (not shown) built in the bearing 49.
Rotating belt 46, drive roller 47, bearings 48, 49,
The storage case unloading means 45 including the unloading drive motor 50
Is configured.

Next, the structure of the transfer means of the lead frame storage case 9 will be described. In FIG. 11, 52 is
A storage case loading means provided at a loading entrance 51 (not shown) in the upper base plate 22 of the base 20. The lead frame storage case 9 loaded into the position [I] from the storage case loader 63 is connected to the lead frame 1. It is transported in the direction of arrow A to the set position [II] at the time of taking out, and is configured in the same manner as the storage case carrying-out means 45, and has a rotating belt 5 for carrying in.
3, a drive roller 47 and a carry-in drive motor 54 are included. The lead frame storage case 9 conveyed to the set position [II] is positioned by the stopper 55, and the lead frame 1 is taken out and supplied by the above-mentioned attracted object pushing-up means 25 and the suction supply means 34 (both not shown). Done. When the removal of the lead frame 1 is completed, the empty lead frame storage case 9 is transferred from the set position [II] to the position [III] by the storage case transfer means 56 in the arrow B direction. Reference numeral 58 denotes a transfer frame for applying a transfer force to the lead frame storage case 9. The transfer frame 58 is guided by a guide shaft 62 (not shown) slidably provided by rotation of a rotary shaft 57 having a ball screw formed therein. Moving. The rotating shaft 57 is rotatably supported by built-in bearings (not shown) of fixed plates 59 and 60 attached to the upper base plate 22, and is rotatably supported by a shaft of a transfer motor 61 attached to the opposite side of the fixed plate 59. Are combined. FIG.
8, the mounting arrangement of the rotating shaft 57 and the guide shaft 62, and the situation where the drive roller 47 rotates in the direction of arrow D and the lead frame storage case 9 is transported in the direction of arrow A by the rotating belt 53. Rotating shaft 57, transport frame 58, fixed plate 59,
60, storage case transfer means 5 including transfer motor 61
6 are configured. The lead frame storage case 9 transferred to the position [III] is moved to the position [IV] in the direction of arrow C by the storage case discharge means 45 described above, and is discharged out of the apparatus by the storage case unloader 64.

Next, the operation of the lead frame supply device according to the first embodiment of the present invention will be described with reference to the drawings.
FIG. 13 is a block diagram of a control system of the lead frame supply device. As described above, the lead frame storage case 9
Is carried into the position [I] (both not shown) from the storage case loader 63, a drive signal is transmitted by the control device 70 to drive the carry-in drive motor 54, and the storage case carry-in means 52 causes the position [I]. II] (not shown). When the drive signal is transmitted by the control device 70 and the elevating motor 31 is driven, the push-up rod 27 pushes up the support plate 16, and when the lead frame 1 at the uppermost position reaches the suction position of the suction pad 36, visible light is emitted. A photo sensor 65 composed of a light emitting diode and a phototransistor light receiving unit detects this and transmits a detection signal to the control device 70. A drive signal is transmitted by the control device 70 receiving this detection signal, and the traversing motor 43 and the cylinder 3
The solenoid valve 68 connected to the vacuum unit 8 and the vacuum unit 69 is driven, and the lead frame 1 is sucked. in this case,
As described above, since the insides of the suction pads 36c and 36f have a sufficient degree of vacuum, the vacuum switches 66 and 67
Do not work together, the control device 70 determines that the object to be sucked is the lead frame 1 and sends a predetermined transfer signal, and the traversing motor 43 and the cylinder 38 are driven, and the suction supply means 34 The lead frame 1 that has moved onto the supply rail 32 and has been sucked is supplied to the rail 32. The vacuum supply means 72 including the vacuum unit 69 and the solenoid valve 68
Is configured.

Similarly, when the insertion plates 13, 14, 15 are pushed up and reach the suction position of the suction pad 36,
As described above, the insertion plates 13, 14, 15 and the support plate 16
Is provided with a communication port 19a (not shown).
In the suction pad 36c, a sufficient degree of vacuum equal to or higher than the set value of the vacuum switch 66 cannot be obtained, and the controller 7
Sent to 0. Then, the control device 70 determines that the to-be-adsorbed body is the interposed plate 13, 14, 15 or the support plate 16, and transmits a predetermined transfer signal, and the traversing motor 43 and the cylinder 38 are driven to attract and supply the suction. Numeral 34 accommodates the interposed plates 13, 14, 15 or the support plate 16 that has moved onto and adsorbed to the collection case 33. Bearing plate 16
After the is sucked, the lifting motor 31 stops and the push-up rod 27 does not rise, so that after a certain period of time, an information signal indicating that there is no object to be sucked at the suction point of the suction pad 36 is transmitted from the photo sensor 65 to the control device 70. Then, the empty lead frame storage case 9 is transferred to the position [III] by the storage case transfer means 56 (not shown) according to the transfer command signal of the control device 70 receiving this. When the transfer is completed, an end signal is transmitted from the control device 70 to the alarm device 71, and a predetermined display or alarm is issued. The control device 70
The incoming / outgoing arrows indicate the direction of signal flow.

Embodiment 2 Hereinafter, a lead frame storage case according to a second embodiment of the present invention will be described with reference to the drawings. FIG. 14 is a cross-sectional view showing a state in which a lead frame is stored in a lead frame storage case according to Embodiment 2 of the present invention, and FIG.
FIG. 5 is a cross-sectional plan view seen in a V direction. In the figure, opening 1
7, a pair of short side plates 10b and a long side plate 10c to form a rectangular parallelepiped container having an open top, and a short side plate 10b and a long side plate 10c.
Notches 12a to 12c and 11a to
The configuration in which the interposed plates 13 to 15 are mounted by using 11c (not shown) and the support plate 16 is mounted on the bottom plate 10a is the same as that in the first embodiment. A characteristic point is that a positioning rod 73 is erected on the bottom plate 10a at a position corresponding to a diagonal hole among the positioning holes 7 of the lead frame 1 housed at a predetermined position. , 15 and the support plate 16 are provided with through holes 74 having a diameter larger than that of the positioning rod 73 and capable of positioning, and the positioning rod 73 is provided with the positioning hole 7 of the lead frame 1 and the insertion plate 13. , 14, 15 and the support plate 16 are housed in a state where the insertion holes 74 are inserted. Also in this case, the uppermost lead frame 1 and the upper interposed plate 13, 14 or 15 are stored so as to have a slight gap between them, and the lower lead frame 1 Deformation is not caused without applying an impact load during transportation. Lead frames include those formed by sinking the die pad and those without sinking. In particular, in the case of a lead frame without sinking the die pad, the lead frame storage case 9 with the positioning rod 73 shown in the second embodiment is used. By positioning and storing, there is an effect that displacement and deformation of the lead frame 1 due to collapse of the load during transportation can be effectively prevented. In the second embodiment, the positioning rods 73 are erected at diagonal positions to each other. However, the present invention is not limited to this, and any two or more positioning rods 73 may be used. good.

Embodiment 3 Hereinafter, a lead frame storage case according to a third embodiment of the present invention will be described with reference to the drawings. FIG. 16 is a perspective view of a container of the lead frame storage case according to the third embodiment of the present invention. In the figure, the configuration in which a rectangular parallelepiped container whose upper part is opened by a bottom plate 10a having an opening 17 (not shown), a pair of short side plates 10b and a long side plate 10c is described in the embodiment. As in 1. Characteristic points are different from those in the first embodiment, in that the interposed plates 13, 14,
15 (not shown) on which notches 75a, 75b,
75c is dispersed and formed as shown. In the figure, the insertion plates 13, 14, 15
(Not shown) are placed on each other to form a lead frame storage case 9. Note that the lead frame storage case of the third embodiment also has the same effect as that of the first embodiment.

Embodiment 4 Hereinafter, an insertion plate of a lead frame storage case according to a fourth embodiment of the present invention will be described with reference to the drawings. 17 (a) and 17 (b) are perspective views of an insertion plate of a lead frame storage case according to Embodiment 4 of the present invention. FIG. 17A shows a resin insertion plate 76 provided with a die pad individual accommodating hole 77 for individually accommodating and positioning a submerged die pad portion (not shown) of a lead frame, and FIG. b) shows a resin insertion plate 78 provided with a die pad comprehensive accommodation port 79 for collectively accommodating and positioning the sinking die pad portion (not shown) of the lead frame, all of which are simultaneously or simultaneously with resin molding. It can be formed by punching. In addition, these are typical examples, and it goes without saying that each of them can be similarly applied and formed not only for the insertion plate but also for the support plate. The lead frame is immersed in the die pad individual accommodating opening 77 and the die pad integrated accommodating opening 79. The positioning procedure for accommodating the die pad portion is the same as that of the first embodiment. If they are the same, there is an advantage that they can be applied irrespective of the die pad sinking amount.

Embodiment 5 Hereinafter, a support plate of a lead frame storage case according to a fifth embodiment of the present invention will be described with reference to the drawings. FIG. 18 is a plan view showing a state in which the air communication port is provided on the support plate of the lead frame storage case during the suction operation by the suction pad. The difference from FIG. 3D is the suction position of the suction pad 36f. Is provided with a communication port 19b communicating with the atmosphere. Then, as shown in FIG. 13, since the suction pad 36f is connected to the vacuum switch 67, when the suction pad 36 tries to suction the support plate 16 in the lead frame take-out step, the degree of vacuum of the suction pad 36f is reduced. The set value is not reached, and the vacuum switch 67 is operated to send an insufficient vacuum signal to the control device 70. Then, the control device 70 determines that the to-be-adsorbed body is the support plate 16 and transmits a transfer signal, and transmits a close signal of the solenoid valve 68 to transmit the suction pad 3.
Then, the lifting motor 31 is driven to lower the push-up rod 27 below the lifting port 24 by releasing the suction of the support plate 16 by the lifting member 6. Next, the transfer motor 61 is driven, and the empty lead frame storage case 9 is transferred from the position [II], which is the processing stage, to the position [III] (not shown) by the storage case transfer means 56. That is, a communication port 19b communicating with the atmosphere is provided at the position where the suction pad 36f is sucked to the support plate 16, and the support plate 16 is provided at the suction position, that is, the lead frame 1 in the lead frame storage case is taken out. Since the completion can be directly detected, it is possible to reliably detect the end of the removal of the lead frame and transfer the empty lead frame storage case from the processing stage.

Embodiment 6 FIG. Hereinafter, an insertion plate and a support plate of a lead frame storage case according to a sixth embodiment of the present invention will be described with reference to the drawings. FIG. 19 is a perspective view of an essential part showing a state in which a cutout for communicating with the atmosphere is provided on the insertion plate and the support plate of the lead frame storage case during the suction operation of the suction pad. FIG. 19A shows the suction pad 3.
FIG. 9 is a representative view in which a notch for air communication 80 is provided at a corner of the insertion plate 13 corresponding to the suction position of 6a, so that the degree of vacuum in the suction pad 36a does not reach a set value during the suction operation. It is. FIG. 19B shows the suction pad 36.
h is a diagram in which a notch 80 for communicating with the atmosphere is provided at a corner of the support plate 16 corresponding to the suction position of h, so that the degree of vacuum in the suction pad 36h does not reach the set value during the suction operation. . In other words, in any case, the communication path communicating with the atmosphere during the suction operation may be provided at the suction position of any of the suction pads 36, and may have any shape as long as the communication path to the atmosphere is formed. It shows good things,
The same effects as in the case of the first and fifth embodiments can be obtained.

[0025]

As described above, the present invention has the following effects. An opening is provided in the bottom plate of the case body, a notch with an open top is provided in the side plate, an insertion plate is placed in this notch, a support plate is placed on the bottom plate, and the insertion plate and the support plate are Since only a predetermined lead frame is stacked and stored, a large number of lead frames can be stored without causing deformation during transport to many lead frames, and can be set as it is in the lead frame take-out and supply device. A lead frame storage case that can be used, is inexpensive, and can improve throughput is obtained. In addition, since the insertion pad and the support plate are provided with the die pad receiving recess or the die pad receiving opening for positioning and sinking the lead frame of the lead frame, the lead frame is not displaced during transportation and is not deformed. A lead frame storage case free from displacement can be obtained. Furthermore, a positioning rod is erected on the bottom plate and inserted into the positioning hole of the lead frame, the insertion hole of the insertion plate and the support plate, and is stored in the case body, so that the lead frame without the sinking die pad part A lead frame storage case with high flexibility can be obtained, which does not deform during transportation and can be stored in a small lead frame by changing its standing position.

Further, since a communication path is provided in the insertion plate at the suction position of the predetermined suction pad and communicates with the atmosphere to reduce the degree of vacuum of the predetermined suction pad to a value that does not reach the set value. The discrimination between the lead frame and the interposed plate can be made directly irrespective of the material, and reliable sorting and supply to the conveying path and the collecting case in the post-process can be performed. Furthermore, a communication path is provided in the support plate at the suction position of the predetermined suction pad to communicate with the atmosphere and reduce the degree of vacuum of the predetermined suction pad to a value that does not reach the set value, so that the determination of the support plate can be made directly regardless of the material. As a result, the empty lead frame storage case from which the lead frame has been taken out can be reliably transferred from the processing stage. In the lead frame storage cases of Embodiments 1, 2, and 3, the container body, the insertion plate, and the support plate
Although formed by resin, it may be formed by aluminum material. In addition, although an example in which three insertion plates are mounted is shown, one insertion plate may be used, and it is assumed that the insertion plate is supported by four notches, but is supported by two opposing notches. It may be the one that causes it.

Also, a lead frame accommodating an insertion plate provided with a communication passage communicating with the atmosphere at a suction position of a predetermined suction pad in a case body having a cutout with an open upper portion on a side plate. A suction means for pushing up the support plate in the case and the processing stage, a suction supply means for discriminating the type of the suction object and sorting and supplying to a conveyance path and a recovery case in a subsequent process, and a vacuum for the suction and suction supply means supply means. Since a supply means and a control means for controlling each of these means are provided, an inexpensive lead frame supply device with high throughput can be obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state in which a lead frame is stored in a lead frame storage case according to Embodiment 1 of the present invention.

FIG. 2 is a bottom view of the lead frame storage case according to the first embodiment of the present invention.

FIG. 3 is a plan view of an insertion plate and a support plate placed inside the lead frame storage case according to the first embodiment of the present invention.

FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG.

FIG. 5 is a plan view for explaining a typical lead frame.

FIG. 6 is a sectional view of a die pad sinking part viewed in a VI-VI direction of FIG. 5;

FIG. 7 is a sectional view showing a state where the lead frame is stored in the lead frame storage case according to the first embodiment of the present invention.

FIG. 8 is an enlarged cross-sectional view showing a state where the die pad sinking portion is accommodated and positioned in the die pad accommodating concave portion of the insertion plate or the support plate in the lead frame accommodating case according to Embodiment 1 of the present invention.

FIG. 9 is a front sectional view of the lead frame supply device according to the first embodiment of the present invention.

FIG. 10 is a plan view of a suction pad of the lead frame supply device according to the first embodiment of the present invention.

FIG. 11 is a partial cross-sectional plan view seen in the XI-XI direction of FIG. 9;

FIG. 12 is a cross-sectional view taken along the XII-XII direction of FIG.

FIG. 13 is a block diagram of a control system of the lead frame supply device according to the first embodiment of the present invention.

FIG. 14 is a cross-sectional view showing a state where a lead frame is stored in a lead frame storage case according to Embodiment 2 of the present invention.

FIG. 15 is a cross-sectional plan view seen in the XV-XV direction of FIG. 14;

FIG. 16 is a perspective view of a container of a lead frame storage case according to Embodiment 3 of the present invention.

FIG. 17 is a perspective view of an insertion plate of a lead frame storage case according to Embodiment 4 of the present invention.

FIG. 18 is a plan view of a support plate of a lead frame storage case according to a fifth embodiment of the present invention.

FIG. 19 is an essential part perspective view showing a state in which a notch for communicating with the atmosphere is provided in an insertion plate and a support plate of a lead frame storage case according to Embodiment 6 of the present invention;

FIG. 20 is a partially sectional perspective view showing a state in which a lead frame of a conventional lead frame carrier case is housed.

[Explanation of symbols]

9; Lead frame storage case 10; Side plate 11, 1
2; Notch 13, 14, 15; Inserting plate 16; Supporting plate 17; Opening 18; Die pad accommodating recess 19; Communication port 20; Base 25; Adsorbing object pushing-up means 26; Drive shaft 27; Push-up plate 31; elevating motor 34; suction supply means 36; suction pad 38; cylinder 39;
0; moving frame 41; rotating shaft 43; traversing motor 56; storage case transferring means 57; rotating shaft 58; transfer frame 61; transferring motors 66, 67; vacuum switch 68; solenoid valve 69; vacuum unit 70; 72; vacuum supply means 73; positioning rod 74; insertion port 75; notch 77; die pad individual storage port 79; die pad general storage port 96; die pad sinking section 80;

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Yoshinari Tsumuda Mitsubishi Electric Kumamoto Semiconductor Co., Ltd. Kumamoto Semiconductor

Claims (11)

[Claims] 1. A rectangular parallelepiped container having an open upper portion and an opening in a bottom plate, wherein at least a pair of opposed side plates have a notch at a predetermined depth from an upper end, and a notch having an upper portion opened from a bottom surface. A container body having a portion, an insertion plate on which a projection is mounted on the cutout bottom surface and only a predetermined lead frame is stacked at the time of transportation, and only a predetermined lead frame is mounted on the bottom plate and stacked at the time of transportation, A lead frame storage case, comprising: a support plate that supports the lead frame and the insertion plate when the lead frame is taken out. 2. The side plate has a plurality of cutout portions having different widths and depths, and each cutout portion is provided immediately below from a wide and shallow depth to a narrow and deep depth sequentially. The lead frame storage case according to claim 1, wherein the case is provided. 3. The lead according to claim 1, wherein the side plate has a plurality of notches having different depths, and each notch is provided at a different position along the periphery of the side plate. Frame storage case. 4. The insert plate and the support plate are provided with a die pad receiving recess or a die pad receiving opening in which the sink die pad portion of the lead frame is received and positioned. The lead frame storage case according to any one of the above. 5. The bottom plate has a diameter smaller than the diameter of the positioning hole and substantially equal to the height of the upper end of the side plate at a position corresponding to at least two of the positioning holes of the lead frame placed and stored at a predetermined position. The positioning rod that reaches is standing,
The insertion hole having a larger diameter than the positioning rod and through which the positioning rod is inserted is opened in the insertion plate and the support plate corresponding to the standing position of the positioning rod. The lead frame storage case according to claim 1. 6. At least at a position where the first suction pad comes into contact with the lead frame in the lead frame taking-out step, it communicates with the atmosphere during the suction operation and the degree of vacuum at the time of suction of the first suction pad does not reach the set value. The first communication path for reducing the value to a value is provided in the insertion plate.
The lead frame storage case according to claim 5. 7. In a lead frame take-out step, at least a position where the second suction pad abuts is communicated with the atmosphere during a suction operation, and the degree of vacuum at the time of suction of the second suction pad does not reach a set value. 7. The lead frame storage case according to claim 6, wherein a second communication passage for lowering the value is provided in the support plate. 8. A lead frame is sucked and taken out one by one by a suction pad from a lead frame storage case set on a processing stage portion, and supplied to a conveyance path in a subsequent process.
In the method of supplying a lead frame to be stored in a recovery case when an object to be sucked other than the lead frame is sucked,
A container having a rectangular parallelepiped shape having an open upper portion and an opening in a bottom plate, wherein at least a pair of opposing side plates has a cutout portion having a cutout bottom surface having a predetermined depth from an upper end and an upper portion opened from a bottom surface. A main body and a plate-like body on which only the predetermined lead frame is stacked with the protrusions mounted on the bottom surface of the notch, and at least at a position where the first suction pad is brought into contact with the main body, and to the atmosphere during the suction operation. Communication with the first
Transporting and setting the lead frame storage case including the insertion plate provided with the first communication path for reducing the degree of vacuum at the time of suction of the suction pad to a value not reaching the set value to the processing stage unit During the suction operation of the suction pad, the first
When the degree of vacuum of the suction pad reaches the set value, the object to be sucked is determined to be a lead frame and supplied to a conveyance path in a post-process, and when the degree of vacuum of the first suction pad does not reach the set value. A method of supplying a lead frame, comprising the step of: determining the object to be sucked as the insertion plate and storing the object in the collection case. 9. A plate-like body which is placed on a bottom plate and has only a predetermined lead frame stacked thereon, and communicates with the atmosphere at the time of a suction operation at least at a position where the second suction pad abuts. And a support plate having a second communication path for reducing the degree of vacuum at the time of suction of the second suction pad to a value that does not reach the set value, and the degree of vacuum of the second suction pad during suction operation of the suction pad is provided. 9. The method according to claim 8, further comprising the step of determining that the removal of the lead frame is completed when the set value is not reached, and transferring the lead frame storage case from the processing stage. 10. When a lead frame is sucked and taken out one by one by a suction pad from a lead frame storage case set on a processing stage portion and supplied to a conveyance path in a subsequent process, and a suction target other than the lead frame is sucked. Is a rectangular parallelepiped container having an opening at the top and an opening at the bottom plate, wherein at least a pair of opposed side plates have a notched bottom surface at a predetermined depth from the upper end in the lead frame supply device housed in the collection case. A container body provided with a notch part whose upper part is opened from above, a plate-like body on which a projection is placed on the bottom surface of the notch and only a predetermined lead frame is stacked, and a first suction pad is brought into contact therewith. The first suction pad communicates with the atmosphere during the suction operation to reduce the degree of vacuum at the time of suction of the first suction pad to a value not reaching the set value.
A lead frame storage case having an interposed plate provided with a communication path of the above and a support plate mounted on the bottom plate and having only a predetermined lead frame stacked thereon, and a suction target at an uppermost position stored in the lead frame storage case. An object-to-be-adsorbed push-up means for pushing up the bottom of the support plate so that the body reaches the suction position of the suction pad, a plurality of suction pads for adsorbing the object to be suctioned, and the first suction pad among them are connected. A suction supply unit that includes a first vacuum switch and is capable of supplying the object to be suctioned to the transport path or the collection case; a vacuum supply unit that supplies or shuts off vacuum to a suction pad of the suction supply unit; Means for supplying or interrupting vacuum to the means, and the first vacuum indicating that the degree of vacuum is equal to or higher than a set value during the suction operation of the suction pad. In response to a switch signal, the suction object is supplied to the transport path, and the suction object is received in response to a signal from the first vacuum switch indicating that the degree of vacuum has not reached a set value. A lead frame supply device comprising a control unit for sending a command signal to be stored in the suction supply unit to the suction supply unit. 11. A support plate is provided at a position where at least a second suction pad of the plurality of suction pads is in contact with the support pad to communicate with the atmosphere at the time of a suction operation and adjust the degree of vacuum at the time of suction of the second suction pad. A second communication path for reducing the pressure to a value not reaching the set value, wherein the suction supply unit for the suction target includes a second vacuum switch to which the second suction pad is connected; In response to the transfer command signal transmitted from the control means, which has received the signal of the second vacuum switch indicating that the degree of vacuum does not reach the set value during the suction operation of the second suction pad, the lead frame storage case is moved from the processing stage unit. The lead frame supply device according to claim 10, further comprising a storage case transfer means for transferring the storage case.