JPH1140735A - Tape sticking device - Google Patents

Abstract

(57) [Summary] (with correction) [PROBLEMS] When a narrow tape piece is attached to an electronic component by pressing a block on which the electronic component is mounted and a pressing member, the pressing force on the tape piece is quickly adjusted. I do. SOLUTION: A cylinder device 28 in which a piston 26 provided on a rod 24 having one end connected to a block 22 on which a lead frame 10 is mounted is inserted into a cylinder chamber 30, and a direction in which the block approaches the punch 16. The switching valve X that supplies compressed air that presses the piston to the partition chamber 30a located below the cylinder chamber partitioned by the piston comes into contact with the narrowly cut tape piece and the lead frame. A switching valve for supplying compressed air having a lower pressure than the compressed air supplied via the switching valve to a compartment 30b located above the cylinder chamber so as to adjust the pressing force between the block and the punch. Z is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape sticking apparatus, and more particularly to a tape for sticking a tape to an electronic component such as a lead frame mounted on a block by pressing the tape with a predetermined pressing force by a pressing member. It relates to a sticking device.

[0002]

2. Description of the Related Art Conventionally, in lead frames for manufacturing semiconductor devices, the number of pins has been promoted in accordance with high speed processing and large capacity of today's semiconductor devices. It has been miniaturized. If such a lead frame is directly transported, the miniaturized inner lead portions may come into contact with each other and be damaged or bent. For this reason, as shown in FIG.
Attaching insulating tape pieces 14, 14,... Cut to a narrow width, such as a polyimide tape, to the inner lead portions 12, 12,... To prevent damage due to mutual contact or the like. . Further, the insulating tape piece 14 cut into a narrow width is used for bonding a semiconductor element with a lead frame, a TAB tape, a resin substrate, or the like, or bonding these to a heat radiating plate.

[0003] As a tape sticking device for sticking an insulating tape piece 14 cut into a narrow width to an electronic component such as a lead frame, a tape sticking device shown in FIG. 5 is used. In this tape sticking apparatus, the lead frame 10 manufactured by punching or etching is pitch-fed below a punching die having a punch 16 and a die 18, and a gap between the punch 16 and the die 18 is provided. The strip-shaped insulating tape 20 having one side or both sides coated with an adhesive is conveyed from the feeding side to the winding side. The punch 16 is driven by a cylinder device 21 which can exert a pressing force necessary for punching and cutting at least the insulating tape 20.

[0004] A block 22 for mounting the lead frame 10 is provided at a position where the insulating tape piece 14 cut into a narrow width is attached to the lead frame 10. Since the block 22 is provided with positioning pins 11 and the like to be inserted into the positioning holes 11, 11... Formed in the lead frame 10, the block 22 is provided so as to be able to move up and down in order to facilitate transport of the lead frame 10. Have been. The cylinder device 2 in which the piston 26 provided on the rod 24 having one end connected to the block 22 is inserted into the cylinder chamber 30 is moved up and down.
8 made. When ascending the block 22, compressed air is supplied to a compartment 30a located below the cylinder chamber 30 defined by the piston 26, and the air in the compartment 30b located above the cylinder chamber 30 is supplied. Exhaust. On the other hand, when descending the block 22, the block 22 descends by supplying compressed air to the compartment 30b and exhausting the air in the compartment 30a.
A decompression unit is provided in the middle of the fluid supply pipe connected to the compartment 30a so that the pressure of the supplied compressed air can be adjusted.

[0005]

According to the tape sticking apparatus shown in FIG. 5, an insulating tape piece 14 cut into a narrow width is attached to a lead frame 10 pressed from below by a predetermined pressure by a cylinder device 28. The tip of the punch 16 can be pressed and adhered, and the insulating tape piece 14 can be automatically attached to a predetermined portion of an electronic component such as a lead frame. 5, the pressure of the compressed air supplied to each of the cylinder device 21 for driving the punch 16 and the cylinder device 28 for driving the block 22 is constant. By the way, when attaching the insulating tape piece 14 to the electronic component, the insulating tape piece 1
4 is applied to a cylinder device 21 for driving the punch 16 and a cylinder device 28 for driving the block 22.
In the tape application device shown in FIG. 5, the pressure of the compressed air supplied to the cylinder devices 21 and 28 is constant, and the pressing force is constant. For this reason, when the kind of the adhesive of the insulating tape 20 is changed or when the width of the insulating tape piece 14 is changed, the pressing force for pressing the insulating tape piece 14 against the electronic component becomes excessive or insufficient, and There are inconveniences such as insufficient adhesion of the insulating tape piece 14 and the protrusion of the adhesive.

In order to eliminate such inconvenience, the present inventor has proposed:
The tape attaching device shown in FIG. 6 was tried. In the tape sticking apparatus shown in FIG. 6, the partition chamber 30 located below the cylinder chamber 30 of the cylinder device 28 for driving the block 22 is provided.
2A, two types of compressed air having different pressures can be supplied as the compressed air rising in the block 22, and the pressing force for pressing the lead frame 10 from below can be adjusted. That is, when the block 22 is raised, the partition pipe 30a of the cylinder chamber 30 is provided with the a1 of the switching valve A from the main pipe M.
The compressed air in the main pipe M can be directly supplied through the pipe 100, the pipe 100, the b1 side of the switching valve B, and the pipe 102. Further, the compressed air depressurized by the pressure reducing valve C from the main pipe M can also be supplied to the partition chamber 30a of the cylinder chamber 30 through the b2 side of the switching valve B and the pipe 102. When descending the block 22, the compressed air is supplied from the main pipe M to the compartment 30b of the cylinder chamber 30 via the pipe 104 via the a2 side of the switching valve A, and the air in the compartment 30a is supplied. Through the b1 side of the switching valve B and the a2 side of the switching valve A.

According to the tape sticking apparatus shown in FIG. 6, the compressed air in the main pipe M is directly supplied to the partition chamber 30a of the cylinder chamber 30 through the switching valves A and B to block 2
When the insulating tape piece 14 cut into a narrow width is pressed and attached to the lead frame 10, the switching valve B is switched to the b2 side, and the decompressed compressed air is supplied to the cylinder chamber 30. The pressure is supplied to the compartment 30a, and the pressing force against the lead frame 10 can be adjusted to a predetermined pressing force.
However, even if the supply of the decompressed compressed air to the compartment 30a of the cylinder chamber 30 is started, it takes time until the pressure in the compartment 30a decreases to the same pressure as the decompressed compressed air. Therefore, if the switching time is early,
The lifting speed of the block 22 becomes slow, and the time required for the tape attaching process becomes long. On the other hand, if the switching time is delayed, the tip of the punch 16 and the lead frame 10 abut before the pressure in the cylinder chamber 30 becomes equal to the reduced pressure of the compressed air. Cannot adjust to pressure. Therefore, an object of the present invention is to apply a tape to a block of electronic components such as a lead frame and a pressing member to apply a tape to an electronic component when the tape is attached to the electronic component. It is to provide a device.

[0008]

The present inventor of the present invention has proposed a tape sticking apparatus shown in FIG. By supplying compressed air of a lower pressure than the compressed air supplied to the compartment 30a to the compartment 30b, the pressing force of the block 22 against the lead frame 10 is reduced by the pressure difference between the compressed air supplied to the compartments 30a and 30b. It can be. Therefore, block 22
It has been found that adjustment of the pressing force on the lead frame 10 can be easily and quickly performed, and the present invention has been achieved. That is, the present invention provides a tape attaching device in which a tape is pressed with a predetermined pressing force by a block on which an electronic component such as a lead frame is placed and a pressing member, and the tape is attached to the electronic component. One of a cylinder device in which a piston provided in a connected rod is inserted into a cylinder chamber, and a pressing fluid in which the block presses the piston in a direction approaching the pressing member, the cylinder being partitioned by the piston. A first fluid supply means for supplying to the side compartment, and a first fluid supply means for adjusting a pressing force between a block and a pressing member abutting via the tape and the electronic component. A second fluid supply means for supplying an adjustment fluid having a lower pressure than the supplied pressurized fluid to the compartment on the other side of the cylinder chamber; In tape applying apparatus characterized.

In the present invention, in the middle of the first fluid supply pipe connected to the compartment on one side of the cylinder chamber,
A first fluid supply means provided with a first switching valve for switching a flow path between a supply side for supplying a pressurized fluid to the one compartment and a discharge side for discharging the fluid in the one compartment is used. And a second chamber connected to the compartment on the other side of the cylinder chamber.
In the middle of the fluid supply pipe, the supply side that supplies the adjustment fluid at a lower pressure than the pressurized fluid supplied by the first fluid supply pipe to the other compartment and the fluid in the other compartment are discharged. By using the second fluid supply means provided with the second switching valve for switching the flow path to the discharge side, it is possible to easily adjust the pressing force of the block. By providing the second fluid supply means with a pressure reducing means for adjusting the pressure of the pressurized fluid supplied by the first fluid supply means to a lower level than that of the pressurized fluid, it is possible to easily obtain a regulated fluid of a desired pressure. Further, when the block in which the gap is formed between the electronic component and the block is provided with the pressurized fluid to one of the compartments of the cylinder chamber and comes into contact with the electronic component, the block is adjusted to the other compartment of the cylinder chamber. Like supplying fluid,
By providing the control means for controlling the first fluid supply means and the second fluid supply and distribution means, the block can be moved at a high speed until the block comes into contact with the electronic component.

According to the present invention, when a tape such as a tape piece cut into a narrow width is pressed and attached to an electronic component, the pressing force for pressing the tape is adjusted by a block for mounting the electronic component. This can be performed by utilizing the pressure difference of the supply fluid supplied to each of the compartments of the cylinder chamber of the driven cylinder device, and the pressing force can be easily adjusted. Moreover,
Since each of the supply fluids with different pressures is independently supplied to and discharged from each of the compartments of the cylinder chamber, the pressure of each of the compartments immediately becomes the same as the supply pressure, and the pressing force of the block can be quickly adjusted. it can.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 schematically shows a tape sticking apparatus according to the present invention. In FIG. 1, a lead frame 10 as an electronic component manufactured by a punching process or an etching process is pitch-fed below a punching die having a punch 16 and a die 18, and between the punch 16 and the die 18. The strip-shaped insulating tape 20 having one side or both sides coated with an adhesive is conveyed from the feeding side to the winding side. The punch 16 is driven by a cylinder device 21.

A block 22 for mounting the lead frame 10 is provided at a position where the insulating tape piece 14 cut into a narrow width is attached to the lead frame 10. Since the block 22 is provided with positioning pins 11 and the like to be inserted into the positioning holes 11, 11... (FIG. 4) formed in the lead frame 10, in order to facilitate the transport of the lead frame 10, It is provided to be able to move up and down. The lifting and lowering of the block 22 is performed by a cylinder device 28 in which a piston 26 provided on a rod 24 having one end connected to the block 22 is inserted into a cylinder chamber 30. When the block 22 is raised, the block 22 is moved upward from the main pipe M to the partition chamber 30 a located below the cylinder chamber 30 partitioned by the piston 26 via the x2 side of the switching valve X and the pipe 34. And pressurized compressed air to be pressed against the partition chamber 30b located above the cylinder chamber 30.
The air inside the pipe 36, the z2 side of the switching valve Z, the pipe 35,
And discharged through the x2 side of the switching valve X. Block 22
Reaches the upper limit position, the adjusted compressed air reduced to a predetermined pressure from the main pipe M through the pressure reducing valve Y, the z1 side of the switching valve Z, and the pipe 36 into the partitioned chamber 30b located above the cylinder chamber 30. Is supplied. The adjusted compressed air supplied to the compartment 30b above the cylinder chamber 30 acts as a force against the pressing force exerted on the piston 26 by the pressurized compressed air supplied to the compartment 30a.

On the other hand, when lowering the block 22,
Pressurized compressed air for pressing the block 22 in the descending direction from the main pipe M via the x1 side of the switching valve X, the pipe 35, the z2 side of the switching valve Z, and the pipe 36 from the main pipe M is supplied to the compartment 30b. The air inside the pipe 34 and the switching valve X
Via the x1 side of The block 22 is provided with a limit switch 38a for detecting the upper limit position and a limit switch 38b for detecting the lower limit position as detecting means for detecting the upper limit position and the lower limit position. Is linked to

With the tape sticking device shown in FIG.
Insulating tape piece 1 cut into narrow width on lead frame 10
When attaching 4, first, the lead frame 10 is pressed from below by the block 22. Therefore, compressed air is directly supplied from the main pipe M to the partition chamber 30a of the cylinder chamber 30 of the cylinder device 28 via the x2 side of the switching valve X and the pipe 34 as a pressurized fluid, and the upper surface of the block 22 is placed on the lead frame 10. Contact. At this time, the division chamber 30b of the cylinder chamber 30 is provided
Since the block 22 is opened to the atmosphere through the second side, the pipe 35, and the x2 side of the switching valve X, the block 22 rises rapidly and comes into contact with the lead frame 10, and the positioning holes 11, 11,. The positioning of the lead frame 10 is performed by inserting the positioning pins into.

When the block 22 comes into contact with the lead frame 10, a limit switch 38a for detecting the upper limit position of the block 22 is operated, and the switching valve Z is switched to the z1 side. For this reason, the compressed air in which the compressed air in the main pipe M is reduced to a predetermined pressure by the pressure reducing valve Y is transferred to the switching valve Z.
Is supplied as a regulating fluid to the compartment 30b of the cylinder chamber 30 via the z1 side and the pipe 36. As a result, the pressing force for pressing the lead frame 10 from below by the block 22 is equal to the pressure of the compressed air supplied to the compartment 30a of the cylinder chamber 30 and the pressure of the compressed air supplied to the compartment 30b of the cylinder chamber 30. Pressure difference, the pressure reducing valve Y
By changing the degree of pressure reduction, the pressing force for pressing the lead frame 10 from below can be changed to a desired value.

Next, the cylinder device 21 is driven to
Is lowered to cut the insulating tape 20 with the die 18, and the cut narrow insulating tape piece 14 is pressed by the tip of the punch 16 by the block 22 with a predetermined pressing force from below under the predetermined pressing force of the lead frame 10. Press into position. At this time, since the pressing force of the punch 16 is usually larger than the pressing force of the lead frame 10 of the block 22, the block 22 slightly sinks due to the pressing force of the punch 16. Therefore, the pressing force of the insulating tape piece 14 against the lead frame 10 is adjusted. Lead frame 10
After a predetermined time (0.1 to 0.5 seconds) elapses after the insulating tape piece 14 is adhered to the substrate, the punch 16 rises, and the block 22 also descends to lead the upper surface of the block 22 to the lead. A gap is formed between the lead frame 10 and the positioning holes 11, 11,.
When the positioning pin 2 comes off, the lead frame 1
0 is pitch-fed. The lowering of the block 22 can be performed by switching the switching valve X to the x1 side and switching the switching valve Z to the z2 side, so that the partitioned chamber 3 of the cylinder chamber 30 is switched.
The block 22 is lowered until the limit switch 38b for detecting the lower limit position is actuated because the compressed air is supplied to the compartment 30b as well as the open state of 0a.

When the insulating tape piece 14 is attached to the lead frame 10, the tape attaching apparatus shown in FIG.
The adjustment of the pressing force on the insulating tape piece 14 is performed in block 2.
2, but only by adjusting the pressing force of the block 22 and the punch 16 on the lead frame 10 as in the tape attaching device shown in FIG. Is also good. In the tape attaching device shown in FIG. 2, the adjustment of the pressing force of the block 22 on the lead frame 10 is performed by
In FIG. 2, members used for adjusting the pressing force of the block 22 are assigned the same reference numerals as in FIG. 1, and detailed description is omitted. Adjustment of the pressing force of the punch 16 against the lead frame 10 in the tape attaching device shown in FIG. 2 is also performed by the cylinder device 40. The cylinder device 40 is a multi-stage cylinder device in which a first cylinder device 42 and a second cylinder device 44 are arranged in series. The first cylinder 26 that defines the first cylinder chamber 48 is inserted into the first cylinder device 42, and moves in the vertical direction by compressed air supplied from one of the supply and discharge ports 45 and 47.

The rod 50 having one end fixed to the first piston 46 is also supplied from one of the supply and discharge ports 55 and 57 to the second cylinder chamber 52 of the second cylinder device 44 having the other end extended. A second piston 54 that can move in the vertical direction by compressed air is inserted, and a second cylinder chamber 52 is defined. The punch 16 is connected to the other end of a rod 56 having one end fixed to the second piston 54. The rod 56 of the second piston 54 is set longer than the stroke length of the rod 50 of the first piston 46. The supply / discharge port 45 provided on the lower end side of the first cylinder device 42 has a larger diameter than the supply / discharge port 55 provided on the lower end side of the second cylinder device 44, and The supply and discharge port 47 provided on the upper end side and the second
Even if compressed air at the same pressure is supplied to the supply / discharge port 47 provided on the upper end side of the cylinder device, the first piston 4
The descending speed of 6 is faster than the descending speed of the second piston 54. Therefore, the lower end of the rod 50 of the first piston 46 abuts on the second piston 54, and both pistons descend integrally.

As described above, when the first piston 46 and the second piston 54 descend integrally, the tip of the punch 16
Since the total pressing force applied to each of the two pistons is applied, the insulating tape 20 can be easily punched. On the other hand, the first cylinder chamber 48 and the second cylinder chamber 5
A stopper 51 is provided at the boundary between the first piston 46 and the second piston 54. The lowering of the first piston 46 reaching the stopper 51 is stopped, but the lowering of the second piston 54 is continued. However, since the pressing force applied to the tip of the punch 16 is only the pressing force applied to the second piston 54, the pressing force in contact with the lead frame 10 and pressing is smaller than the pressing force when punching the insulating tape 20. As a result, the pressing force applied to the insulating tape piece 14 can be made appropriate together with the adjustment of the pressing force for pressing the lead frame 10 of the block 22 from below.

With the tape sticking device shown in FIG.
In order to attach the insulating tape piece 10 to the lead frame 10, similarly to the tape attaching apparatus shown in FIG. 1, first, the block 22 rising from below by the cylinder device 28 abuts on the lead frame 10,
0 is pressed from below by a predetermined pressing force [FIG.
(A)]. Next, compressed air having the same pressure is supplied from the supply / discharge ports 47 and 57 of the first cylinder device 42 and the second cylinder device 44 so that the lower end of the rod 50 of the first piston 46 abuts on the second piston 54. The piston is integrally lowered to cut the insulating tape 20 by the punch 16 and the die 18, and the cut insulating tape piece 14 is attached to the tip of the punch 16 and lowered (FIG. 2B). Then the first
The piston 46 abuts the stopper 51 and stops descending, but only the second piston 54 descends, and the tip of the punch 16 abuts on the lead frame 10 via the insulating tape piece 14 to connect the insulating tape piece 14 to the lead frame. 10 (FIG. 2C). At this time, since the pressing force of the punch 16 is usually larger than the pressing force of the block 22, the lead frame 10 slightly sinks. After the bonding of the insulating tape pieces 14 is completed, compressed air is supplied from the supply / discharge ports 45 and 55 of the first cylinder device 42 and the second cylinder device 44, and the first piston 46 and the second piston 54 rise. At the same time, the block 22 also descends and returns to the position shown in FIG.

The above-described tape sticking apparatus shown in FIGS. 1 and 2 has been described in connection with the case where an insulating tape piece is stuck to a lead frame. May be used for bonding via a tape. Also, when manufacturing a multilayer lead frame, each of the lead frame, the power plane, and the ground can be laminated with the double-sided adhesive tape by using the tape attaching apparatus shown in FIG. 1 or FIG. In the tape applying device shown in FIG. 2, a two-stage cylinder device is used. However, a multi-stage cylinder device having two or more stages may be used, and the block 22 may be heated.

[0022]

According to the tape sticking apparatus of the present invention, even when the type of the adhesive of the tape is changed or the width of the tape piece is changed, the pressing of the tape against the electronic component is performed. Pressure can be easily adjusted. For this reason, the pressing force for pressing the tape against the electronic component can be optimized, and the tape can be bonded to the electronic component with sufficient adhesive strength while preventing the adhesive from protruding from the tape.

[Brief description of the drawings]

FIG. 1 is a schematic diagram illustrating an outline of a tape attaching device according to the present invention.

FIG. 2 is a schematic diagram illustrating an outline of another tape applying apparatus according to the present invention.

FIG. 3 is an explanatory diagram illustrating an outline of an operation of the tape attaching device illustrated in FIG. 2;

FIG. 4 is a front view showing a lead frame to which an insulating tape piece is attached.

FIG. 5 is a schematic diagram illustrating an outline of a conventional tape sticking apparatus.

FIG. 6 is a schematic diagram illustrating an outline of a tape attaching device obtained by improving the conventional tape attaching device shown in FIG. 5;

[Explanation of symbols]

 Reference Signs List 10 lead frame 16 punch 18 die 20 lead frame 21 punch driving cylinder device 22 block 24 rod 26 piston 28 cylinder device 30 cylinder chamber 30a, 30b compartment X, Y switching valve Z pressure reducing valve

Claims (4)

[Claims] 1. A tape sticking apparatus for pressing a tape with a predetermined pressing force by a block on which an electronic component such as a lead frame is mounted and a pressing member and bonding the tape to the electronic component, one end of which is connected to the block. A cylinder device in which a piston provided on a rod provided is inserted into a cylinder chamber; and a pressing fluid that presses the piston in a direction in which the block approaches the pressing member, on one side of the cylinder chamber partitioned by the piston. A first fluid supply means for supplying the liquid to the compartment, and a first fluid supply means for adjusting a pressing force between a pressing member and a block abutting via the tape and the electronic component. And a second fluid supply means for supplying an adjustment fluid having a lower pressure than the pressure fluid to be supplied to the other compartment of the cylinder chamber. Tape sticking device. A first fluid supply means for supplying a pressurized fluid to said one compartment in the middle of a first fluid supply pipe connected to the one compartment of the cylinder chamber; A first switching valve for switching a flow path between the first chamber and a discharge side for discharging a fluid in the one chamber; and a second fluid supply means connected to the other chamber of the cylinder chamber. In the middle of the second fluid supply pipe, a supply side for supplying a regulating fluid having a lower pressure than the pressurized fluid supplied by the first fluid supply pipe to the other compartment, and a fluid in the other compartment. 2. The tape sticking apparatus according to claim 1, further comprising a second switching valve for switching a flow path between the discharge side and the discharge side for discharging the fluid. 3. The second fluid supply means is provided with a decompression means for adjusting the pressure of the pressurized fluid supplied by the first fluid supply means to a lower level than that of the pressurized fluid. Tape sticking device. 4. A block in which a gap is formed between an electronic component and a block formed on the other side of the cylinder chamber when a pressing fluid is supplied to one of the partition chambers of the cylinder chamber and comes into contact with the electronic component. The tape application device according to any one of claims 1 to 3, further comprising control means for controlling the first fluid supply means and the second fluid supply / distribution means so as to supply the adjustment fluid to the chamber. .