JPH0587138B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a take-up reel structure in an external lead bonding apparatus for bonding external leads of a solid device punched from a film carrier to a lead frame or a substrate.

[Prior Art] As shown in FIG. 6, the external lead bonding device
A solid device 2 supported by an external lead 2a is punched out on a film carrier 1 having sprocket holes 1a on both side bands, and a lead frame 3 shown in FIG. 7 or a substrate 4 shown in FIG. 8 is formed.
The step of aligning and placing the external lead 2a on the lead joint portion 3a or 4a and bonding the external lead 2a and the lead joint portion 3a by bonding as shown in FIGS. 9 and 10 is performed. This is done fully automatically. Hereinafter, the term lead frame refers to both the lead frame 3 and the substrate 4.

The film carrier 1 is wound around a supply reel, from which it passes through the punching section and is wound onto a take-up reel.

By the way, since the solid device 2 is attached to the film carrier 1 as described above, in order to protect the solid device 2, the film carrier 1 is overlapped with a spacer tape and wound around the supply reel. . The film carrier 1 is discarded after the solid device 2 is punched out, but the spacer tape is reused.
If the film carrier and spacer tape are wound together, a step is required to separate them.

Conventionally, there has been known a method in which a film carrier and a spacer tape are wound onto separate take-up reels.

[Problems to be Solved by the Invention] In the conventional example described above, the film carrier take-up reel and the spacer tape take-up reel are simply arranged side by side, so there is a problem that a large space is required and the device becomes large. The dot was hot.

An object of the present invention is to provide a take-up reel structure for an external lead joining device that can save space.

[Means for Solving the Problems] The problem with the above conventional technology is that one of the rotating shafts of the film carrier take-up reel and the spacer tape take-up reel is a hollow shaft, and the other is inserted into this hollow shaft. However, this can be solved by providing a configuration in which each of them is independently rotatable.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 5. As shown in FIGS. 1 to 3, this device includes a frame body including a main body 10 and a control housing 11 provided on the upper surface thereof. Inside the main body 10, a film carrier 1 supply/storage device 12 is provided.

As shown in FIGS. 1 and 4, on the supply side of the supply and storage device 12 for the film carrier 1, there is a main body 1.
There is a supply reel 14 mounted on a rotary shaft 13 rotatably supported at 0, and the rotary shaft 13 is rotated by a synchronous motor 15. The supply reel 14 is wound with a spacer tape 16 that prevents the film carrier 1 and the solid device 2 from being overlapped and damaged during winding. On the other hand, on the storage side, there is a film carrier take-up reel 18 provided parallel to and offset from the supply reel 14 on a hollow rotating shaft 17 rotatably supported by the main body 10, and a film carrier take-up reel 18 provided parallel to and offset from the supply reel 14; A spacer tape take-up reel 20 is provided on a rotating shaft 19 that is rotatably supported by a spacer tape and is aligned with the supply reel 14 .
The rotating shafts 17 and 19 are each connected to a synchronous motor 2.
1 and 22.

A sizing feed device 30 is provided on the top surface of the main body 10 to feed the film carrier 1 sent from the supply/storage device 12 by a sizing amount. Sizing feed device 30
A pair of sprockets 32 and 33 (not shown) are rotatably supported on a support base 31 provided on the upper surface of the main body 10 on the traveling path of the film carrier 1 fed out from the supply reel 14. It is equipped with a sprocket rotation synchronous motor (not shown) that rotates these two sprockets 32, 33 synchronously by means of a belt transmission means. When the sprocket rotation synchronous motor engages with the teeth, the film carrier 1 can be sequentially fed in fixed-length increments by constant-angle intermittent rotation of the sprocket rotation synchronous motor.

Further, a punch unit 40 for punching out the solid device 2 on the film carrier 1 is provided on the upper surface of the main body 10 and is attached to the sizing feed device 30. The punch unit 40 includes a punching actuator 41 that is provided along a fixed-length feed path of the film carrier 1 connecting the sprockets 32 and 33, and punches the solid device 2 with a punching tool while clamping the film carrier 1. A direct-acting cam follower 42 provided below the punching actuator 41 to raise and lower it.
and an air cylinder 4 that comes into contact with this and raises and lowers it.
3 and a linear cam 44 that reciprocates.

Further, a feeding device 45 is provided on the upper surface of the main body 10 for feeding the lead frame 3 intermittently by a fixed distance using a well-known claw type or belt type conveying means. Further, although not shown, separate conveying means are provided on the supply side and the discharge side of the feeding device 45, respectively, so that a large number of lead frames 3 can be automatically fed sequentially.

Further, a film carrier 1 is provided on the top surface of the main body 10.
a transfer arm device 50 for transferring the solid device 2 punched from the solid device 2 to a predetermined position on the lead frame 3;
An optical device 70 that confirms the position of the solid device 2 during the transfer, and a bonding station 2 that bonds the solid device 2 transferred onto the lead frame 3 with a bonding station provided along the transfer path of the feed device 45 of the lead frame 3. Two first and second bonding devices 80 and 81 are provided. These transfer arm device 50 and optical device 7
0, first and second bonding devices 80, 81
is not directly related to the gist of the present invention, and its structure is not limited to that shown in the drawings, but may be a well-known structure, so it will be briefly explained here.

Transfer arm device 50 for transferring solid device 2
Although the details are not shown, there is an XY direction moving table driven in the XY directions, a lifting table provided on the XY direction moving table and raised and lowered by a vertical drive mechanism, and a film carrier 1 fixed to the lifting table. It includes an elevating arm extending along the Y direction perpendicular to the travel path of the elevating arm, and a vacuum suction head provided at the tip of the elevating arm. And said
By moving the XY direction moving table, the vacuum suction head can advance directly above the punch unit 40, so that it is possible to suction and hold the solid device 2 punched by the punching tool as it is. It's summery.

The optical device 70 for confirming the position of the solid device 2 includes:
A device for checking the positional deviation of the solid device 2 transferred by the transfer arm device 50 when it is sucked by the vacuum suction head, and a lead frame 3
A device for checking the deviation of the lead frame 3 sent by the feeding device 45 from the reference position. The former uses a camera 71 provided directly above the transfer path of the solid device 2, a prism (not shown) provided directly below the camera 71, and a light projector 73 that refracts light with the prism and projects it onto the camera 71. The latter includes a camera 74 provided directly above a predetermined first bonding station provided along the conveyance path of the lead frame 3.
and a light projector 75 that reflects light onto the lead frame 3 and projects it onto the camera 74.

The bonding devices 80 and 81 are provided respectively for the first bonding station described above and a second bonding station adjacent thereto which is also provided on the conveyance path of the lead frame 3, and are connected to the well-known bonding head. At the tip of the bonding arm 82, which extends and moves up and down, there is a relief part 83a in the center, as shown in FIG.
A bonding tool 83 is fixed. This bonding tool 83 straddles the main body portion of the solid device 2 to avoid interference and connects the external leads 2 provided on two opposing sides.
In the first bonding device 80 provided in the first bonding station, the escape part 83a of the bonding tool 83 is provided so that the vacuum suction head can also escape, and the second In the second bonding device 81 provided in the bonding station, the relief portion 83a of the bonding tool 83 is provided perpendicularly to that of the first bonding device 80.

Next, the operation of the external lead bonding device having such a configuration will be explained. When the film carrier 1 is unwound from the supply reel 14, it is fed by sprockets 32 and 33 by a fixed length. The film carrier 1 is fed a fixed length and the solid device 2 is moved to the punching actuator 41 of the punch unit 40.
Once positioned at the upper predetermined position, the air cylinder 43 is operated to move the linear cam 44 to the right, which causes the linear cam follower 42 to rise and push up the punch (not shown) of the punching actuator 41. After the film carrier 1 is clamped and fixed by a well-known mechanism, the solid device 2 is punched upward by a punching tool.
At this time, the solid device 2 is placed on the punching tool separated from the film carrier 1.

Next, the XY direction moving table of the transfer arm device 50 moves, and the vacuum suction head provided at the tip of the lifting arm is positioned directly above the solid device 2. Then, the vacuum suction head is lowered by the vertical drive mechanism of the transfer arm device 50 to suction and hold the solid device 2. The vacuum suction head then lifts up holding the solid device 2. and again
The XY direction moving table is operated to move the vacuum suction head and position the solid device 2 below the optical device 70 for confirming its position. At this time, the light emitted from the light projector 73 is refracted by the prism and is projected onto the camera 71 so as to pass through the solid device 2 from below. The image captured by the camera 71 is processed by a recognition unit (not shown), and at the same time, the light emitted from the light projector 75 is reflected on the surface of the lead frame 3 and projected onto the camera 74, thereby producing a lead frame 3. The images are also processed by the same recognition unit, and based on the recognition result of the two positional deviations, feedback is given to the rotation amount of the feed motor that drives the XY direction movement table of the transfer arm device 50 to correct the deviation. .
As a result, the vacuum suction head moves further to correctly position the solid device 2 directly above the predetermined position of the lead frame 3.

When the positioning is completed, the vertical drive mechanism of the transfer arm device 50 operates again, and the vacuum suction head correctly places the solid device 2 on the predetermined position on the lead frame 3, and then gently presses it downward. Hold. Then, in this state, the bonding arm 82 of the first bonding device 80 is lowered by a well-known mechanism, and the bonding tool 83 escapes both the solid device 2 and the vacuum suction head 65 through the relief part 83a and interferes with the The external leads 2a provided on two opposing sides of the solid device 2 are bonded to the lead frame 3 at the same time while avoiding the above.

Thereafter, when the bonding arm 82 rises, the vacuum suction head also stops adsorbing the solid device 2, rises, and advances above the punch unit 40 to repeat the series of operations again. On the other hand, the solid device 2 to which half of the external leads 2a have been bonded is intermittently fed by the feeding device 45 to the second bonding station, where it is transferred to the second bonding station in exactly the same way as the first bonding device 80.
By means of the bonding device 81 of
The external leads 2a on the sides are bonded to the lead frame 3 at the same time, and the bonding of the external leads 2a is completed here.

Now, film carrier 1 is punch unit 4.
When the film passes through 0, it is wound onto the film carrier take-up reel 18 via the sprocket 33. At this time, the synchronous motor 21 is connected to the sprocket 33.
It is designed to rotate intermittently in accordance with the intermittent rotation to ensure smooth winding. On the other hand, the spacer tape 16 is such that the film carrier 1 is connected to the solid device 2.
After being punched out, the spacer tape is wound separately from the supply reel 14 onto an adjacent take-up reel 20 for reuse rather than being discarded. In this embodiment, since the spacer tape take-up reel 20 is provided coaxially with the film carrier take-up reel 18, space efficiency is extremely high.

[Effects of the Invention] As is clear from the above description, according to the present invention, one of the rotation shaft of the film carrier take-up reel and the rotation shaft of the spacer tape take-up reel is a hollow shaft, and the other is a hollow shaft. Since they are inserted into and rotatable independently, space can be saved.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an embodiment of the external lead joining device according to the present invention, Fig. 2 is a right side view of Fig. 1, Fig. 3 is a plan view of Fig. 1, and Fig. 4 is a film carrier. 1 is a sectional view of the portion indicated by arrow A-A, FIG. 5 is a diagram of the operating state during bonding, FIG. 6 is a plan view of the film carrier, and FIG. FIG. 8 is a plan view of the lead frame; FIG. 9 is a plan view of the solid device bonded to the lead frame; FIG.
The figures are top and side views of a solid state device bonded to a substrate. 1... Film carrier, 14... Supply reel, 16... Spacer tape, 17... Rotating shaft,
18...Film carrier take-up reel, 19
... Rotating shaft, 20 ... Spacer tape take-up reel.

Claims (1)

[Claims] From the supply reel on which the film carrier and spacer tape are wound in a superimposed manner, the film carrier is sent to the punching section and wound on the film carrier take-up reel, and the spacer tape is wound on the spacer tape take-up reel. In the take-up reel structure of the device, one of the rotation shaft of the film carrier take-up reel and the rotation shaft of the spacer tape take-up reel is a hollow shaft, and the other is inserted into the hollow shaft so that each can rotate independently. A take-up reel structure in an external lead joining device, characterized in that: