JPS62188328A - Pellet mounting apparatus - Google Patents

Abstract

PURPOSE:To enable the smooth and rapid mounting of pellets on pellet mounting elements, by adjusting a space between a conveyance start position of a substrate and a position of application of a bonding material, on one hand, and a pellet mounting position, on the other, in accordance with a pitch of the substrate supplied between adjacent pellet mounting elements. CONSTITUTION:In accordance with a pitch P between adjacent pellet mounting element 13 of a lead frame 12 supplied from the upstream side, the position of a foremost pellet mounting element 13 to a pellet mounting position 27 and the position 20 of application of a bonding material to the pellet mounting position 27 are transferred for adjustment to positions spaced by an integer multiple of the pitch P respectively. Thereby each pellet mounting element 13 for the lead frame 12 conveyed by pitches is positioned in the state wherein it stops at the position 20 of application and the mounting position 27 corresponding thereto. Accordingly, an operation of applying the bonding material and an operation of mounting a pellet 28 are conducted at the position 20 of application and the mounting position 27 respectively in independent states for lead frames 12 conveyed sequentially.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a pellet mounting device for mounting pellets of ICs, LSIs, etc., onto respective pellet mounting portions on a substrate such as a lead frame.

[Prior Art] A lead frame [substrate] having a constant length and having a plurality of pellet mounting portions arranged at a predetermined pitch P in the longitudinal direction is described in, for example, Japanese Patent Laid-Open No. 59-225532. It is conveyed along the longitudinal direction by a conveying device. In other words, the lead frame is transported by the transport device,
This is done by moving in a predetermined direction while being guided by a guide section. At this time, the lead frame is transported at a pitch P such that each pellet mounting portion of the lead frame is sequentially stopped at a pellet mounting position in the transport process.

Pellets are loaded into each pellet loading portion that is parked at the pellet loading position using, for example, a device described in Japanese Utility Model Application Laid-Open No. 58-85340.

This device includes a three-pronged arm that reciprocates around a drive shaft, a first collet at the tip of the first arm, a second collet as a pellet mounting body at the tip of the second arm,
Application nozzles serving as application bodies are arranged at the tips of the third arms.

Among these, the first collet is reciprocated between the pellet supply position and the pellet uniformity position by the swinging of the three-pronged arm,
The pellets supplied to the pellet supply position can be transferred to the pellet alignment position. At this time, the pellets transferred to the pellet alignment position are aligned to a predetermined alignment angle by the alignment claw provided at the position. The second collect is 3
Further, by swinging the arm, it is reciprocated between the pellet alignment position and the pellet mounting position during the conveyance process.

Further, the application nozzle is reciprocated between the pellet mounting position and the retracted position by the swinging of the three-pronged arm.

Among these, the coating nozzle is swung to the pellet mounting position so that the bonding material can be applied to the pellet mounting portion of the lead frame that is stopped at the pellet mounting position. Further, the second collet is capable of holding the pellets that are aligned and positioned at the pellet alignment position while being swung to the pellet alignment position. The pellets held at the uniform position are transferred to the pellet mounting position by the second collect. After the second collet that holds the pellet is swung to the pellet mounting position, the pellet is mounted on the pellet mounting portion coated with the bonding material.

As described above, the conventional pellet mounting device conveys the fixed frame at pitches in the longitudinal direction, and alternately positions the coating nozzle as the coating body and the second collet as the pellet mounting body with respect to the pellet mounting position. This allows pellets to be sequentially attached to each pellet attachment portion of the lead frame.

In this type of pellet mounting device, when the pitch P between adjacent pellet mounting sections changes, the conveyance pitch of the lead frame is changed according to the pitch P, and each pellet mounting section is stopped at the pellet mounting position. - By positioning, it becomes possible to deal with lead frames having various pitches P.

[Means for Solving the Problems] However, in the above-mentioned conventional pellet loading device, the second collet and the coating nozzle are alternately positioned with respect to the pellet loading portion that is stopped at the pellet loading position, thereby removing the pellets. Therefore, the time for attaching pellets to one pellet attaching portion was limited by the swing cycle time of the three-pronged arm. For this reason, there is a limit to setting the conveyance pitch of the lead frame quickly and improving the efficiency of attaching pellets to each pellet attaching section.

The present invention is applicable to lead frames having different pitches between adjacent pellet mounting parts, and aims to smoothly and quickly attach pellets to each pellet mounting part of a lead frame being transported. There is.

[Means for Solving the Problems] In order to achieve the above object, the present invention has a fixed length and a plurality of pellet mounting portions arranged at a predetermined pitch P in the longitudinal direction.
Pellet mounting is carried out in such a way that the board, which has been arranged with a handle, is transported along the longitudinal direction while being guided by a guide part, and a bonding material is sequentially applied to each pellet mounting part of the board being transported, so that pellets can be mounted. (a) disposed at an upstream application position in the conveyance direction of the substrate;
(b) a bonding material applicator that can apply a bonding material to the pellet mounting portion of the board being transported; and (b) a pellet mounting body disposed at a downstream pellet mounting position in the transport direction of the board and coated with the bonding material. (c) a pellet loading body that allows pellets to be attached to the guide section; and (d) the substrate supplied from the upstream side of the guide part, at a pitch conveyance start position where the position of the leading pellet mounting part is upstream of the coating position and is an integral multiple of the pitch P with respect to the pellet mounting position. (e) means for adjusting the pitch conveyance start position of the substrate that can adjust the position of the supplied substrate in the conveyance direction so as to position the substrate; The present invention is provided with a movement adjustment means for a coating body that can adjust the movement of the coating body in the conveyance direction so that the interval between positions is an integral multiple of the pitch P.

[Function] According to the present invention, it is possible to adjust the pitch conveyance start position of the substrate and the interval between the bonding material application position and the pellet mounting position according to the pitch P between adjacent pellet mounting parts of the supplied substrate. As a result, the pellet device section of the pitch-transferred substrate is positioned at the corresponding coating position and mounting position. Therefore, it is possible to simultaneously perform the application of the bonding material at the application position and the installation of pellets at the installation position independently of each other on the substrates that are sequentially transported. This makes it possible to deal with substrates having different pitches between adjacent pellet mounting sections, and it becomes possible to smoothly and quickly attach pellets to each pellet mounting section of the substrate being transported.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view showing a pellet loading device according to an embodiment of the present invention, FIG. 2 is a plan view showing the main parts of FIG. 1, and FIG. 3 is a cross section taken along line mm in FIG. 1. Figure 4 is I of Figure 2.
5 is a sectional view taken along line V-IV in FIG. 2, FIG. 6 is a sectional view taken along line Vl-Vl in FIG. 1, and FIG. 7 is a sectional view taken along line Vl-Vl in FIG. 1. 2 is a flowchart showing the operating sequence of the pellet loading device shown in FIG.

The pellet mounting device IO includes a pair of guide rails 11A and 11B as guide portions in the direction of arrow X. A pair of guide rails IIA, IIB allows lead frames [substrates] having various widths and lengths to be guided and transported in the direction of arrow A. The lead frame being transported in FIG. 1 has a constant length and a width W, and a plurality of pellet mounting portions 13 are arranged at a predetermined pitch P in the longitudinal direction. a pair of guide rails IIA,
11B is formed with a recess 14 that can hold the end of the lead frame 12 in the width direction [Y direction] [see FIG. 3].
can be transported in the direction of arrow A along.

The width between the pair of guide rails IIA, 118 is adjusted by driving the guide width adjustment motor 15. A plurality of guide width adjustment motors 15 are arranged along the longitudinal direction [X direction] of the guide rails 11A and IIB, and a screw shaft 17 is connected to the driving shaft 16 of each motor 15 as shown in FIG. The screw shaft 17 has a left-hand threaded portion 18A.
and a right-hand threaded portion 18B. Of these, left threaded part 1
8A is screwed into one guide rail IIA, and the right-hand threaded portion 18B is screwed into the other guide rail IIB. As a result, the pair of guide rails 11A and IIB can be moved toward and away from each other by adjusting the rotation of the screw shaft 17 in both forward and reverse directions, and the rotation adjustment is performed by controlling the drive of each motor 15. This is done by The drive control of each motor 15 is performed based on the drive command of the guide width adjustment section 19 shown in FIG. It becomes possible to adjust. In FIG. 6, the width W between each of the four parts 14 of the guide rails IIA and IIB corresponds to the width W of the lead frame 12.
is adjusted to

A bonding material application position 20 is provided on the upstream side of the conveyance line Q between the 18 pairs of guide rails IIA and IIB. At number M20, the lead frame 12 to be conveyed is
Each of the pellet mounting portions 13 is retained, and a bonding material is applied to the pellet mounting portions 13. That is, application position 20
A coating nozzle 21 serving as a bonding material applicator is disposed above the bonding material. The coating nozzle 21 is supported at the tip of the support arm 22 so as to be movable up and down by the drive of an elevating means (not shown). A base end portion of the support arm 22 is supported by a slide body 23 that is movable in the direction of the arrow X. That is,
The slide body 23 is screwed together with a screw shaft 25 connected to a driving shaft of a slide motor 24.
It is made movable in the direction of arrow X by the drive adjustment of 4. As a result, the application nozzle 21 supported by the slide body 23 via the support arm 22 can be moved in the direction of the arrow X by adjusting the drive of the motor 24, and thereby the application position 20 of the bonding material can also be moved in the direction of the arrow X. It becomes possible to adjust the movement in the indicated X direction. At this time, the drive adjustment of the motor 24 is performed based on a command from the coating nozzle movement adjustment section 26, and the amount of movement of the slide body 23 is adjusted based on the command. The coating nozzle 21 is sequentially conveyed to the coating position 20 and moved downward relative to the pellet mounting portion 13 of the lead frame 12 where it is stopped, thereby coating the pellet 13 with a bonding material made of epoxy bonding agent, conductive silver paste, etc. can be applied.

On the other hand, on the downstream side of the lead frame 12 conveyance line,
A pellet mounting position 27 is provided. At the position 27,
Each pellet mounting portion 13 of the lead frame 12 being transported
is stopped, and the pellet 28 is mounted on the pellet mounting portion 13 coated with the bonding material. That is, above the pellet mounting position 27, a collet 29 as a pellet mounting body is disposed. The collet 29 is supported by the tip of a swinging arm 30, and the swinging arm 30 can swing in the direction of arrow B about a support shaft 30A. The swinging of the swinging arm 30 is caused by the collet 2 at the tip.
9 is reciprocated between the pellet supply position 31 and the pellet mounting position 27. Pellet supply position 31
By driving the conveyor 32, the pellets 28 to be sequentially loaded are conveyed and positioned.

The collet 29 is able to hold the pellet 28 being transported to the pellet supply position 31 while being oscillated and positioned at the pellet supply position 31 . The collet 29 holding the pellet 28 is swung to the pellet mounting position 27 by the swiveling of the swing arm 30. The collet 29, which is swung and positioned at the pellet mounting position 27, is stopped at the position 27, and a pellet 28 can be mounted on the pellet mounting portion 13 coated with the bonding material. In this way, the lead frame 12 with the pellets 28 mounted on each pellet mounting portion 13 is transported along the transport line Q to the next process.

The conveyance state of the lead frame 12 in the direction of arrow A is a continuous feeding state on the upstream side with respect to the coating position 20 and the mounting position 27, and an intermittent feeding state on the downstream side corresponding to the coating position 20 and the mounting position 27. That is, the lead frame 12 fed from the upstream side is continuously fed to the pitch conveyance start position 35 by continuous rotation of each continuous feed roller 33, 34 in the direction of arrow C shown in FIG. On the other hand, the lead frame 12 has been transported to the pitch transport start position 35.
are successively conveyed from the position 35 to the downstream side with a pitch P between adjacent pellet mounting portions 13 of the lead frame 12.

Pitch conveyance of the lead frame 12 is performed by intermittent rotation of the rollers 36, 37, and 38 of each conveyor, and the lead frame 12 conveyed thereby passes through the application position 20 and the mounting position 27 on the conveyance line Q. I will do it.

The most upstream feed roller 36 among the intermittent feed rollers 36, 37, and 38 is disposed upstream of the pitch conveyance start position 35. The intermittent feed roller 36 is shown in FIG.
As shown in the figure, an upper roller 36A disposed above the conveyance line Q and a lower roller 3 disposed below the conveyance line Q.
Consists of 6B. The upper roller 36A is a floating roller that is always in contact with the lead frame 12 supplied from the upstream side. On the other hand, the lower roller 36B is a drive roller that can move into and out of contact with the lead frame 12 supplied from the upstream side in the direction of the arrow. The lower roller 36B is the drive shaft 3
9, and the lower roller 3BB is supported by the drive shaft 39.
The intermittent rotation causes intermittent rotation in the direction of arrow C. The drive shaft 39 is rotatably supported by one end of an actuation rod 40 shown in FIG. The actuating rod 40 is capable of swinging at both ends in the direction of the arrow around a support shaft 42 supported by a fixed frame 41. At the other end of the operating rod 40,
A piston rod 44 of a cylinder device 43 is connected, and the cylinder device 43 is supported by a fixed frame. Further, a tension spring 45 is interposed between the other end of the operating rod 40 and the fixed frame 41, and a tension spring 45 is interposed between the other end of the operating rod 40 and the fixed frame 41.
is always urged in the direction of contacting the lead frame 12. As a result, by driving the piston rod 44 of the cylinder device 43 forward, it is possible to move the lower roller 36B away from the lead frame 12. Further, by driving the piston rod 44 backward, it is possible to move the lower roller 36B closer to the lead frame 12.

The intermittent rotation of the drive shaft 39 is performed by the rotation of the intermittent drive motor 46. A drive pulley 47 is attached to the driving shaft of the intermittent drive motor 46, a driven pulley 48 is attached to the drive shaft 39, and a belt 49 is suspended between each pulley 47,48. As a result, the drive shaft 39 is driven intermittently by the motor 46.
is rotated.

Along with this, the lower roller 36B is also intermittently rotated in the direction of arrow C. The intermittent drive of the motor 46 is performed based on a command from the motor intermittent drive amount adjustment section 50, so that the motor 50 is intermittently driven with a drive amount that corresponds to the pitch P. Therefore, by bringing the lower roller 36B into contact with the lead frame 12 and further driving the motor 46 intermittently, the lead frame 1 is supplied from the upstream side.
2 is sandwiched between the upper roller 36A and the lower roller 36B, and it becomes possible to carry out pitch conveyance. Note that the driving shaft of the motor 46 and the swing center of the operating rod 40 are located on the same axis.

On the other hand, the other intermittent roller 37 in the conveyance line Q.
38 is also intermittently rotated in the direction of arrow C by the drive of a motor (not shown), and the rotation of this motor is also performed based on commands from the motor intermittent drive amount adjustment section 50.

Continuous feeding of the lead frame 12 by the respective continuous feeding rollers 33 and 34 is performed until the leading edge position 51 of the lead frame 12 fed from the upstream side reaches the pitch conveyance start position 35. During this time, the lower roller 36B of the roller 36 that is intermittently fed is spaced apart in the direction of separation from the conveyance line Q to prevent it from colliding with the lead frame 12 that is continuously fed. At the pitch conveyance start position 35, a stopper pin 52 that moves forward and backward with respect to the conveyance line Q of the lead frame 12 is provided [see FIGS. 2 and 3]. The stopper pin 52 is supported by the slide frame 53 so as to be movable up and down. The slide frame 53 has
Cylinder device 55 via cylinder support bracket 54
The cylinder device 55 includes a piston rod 56 that is moved forward and backward in the Z direction and connected to the lower end of the stopper pin 52. A compression spring 58 is interposed between the spring receiving portion 57 above the stopper pin 52 and the slide frame 53, and the spring 58 biases the tip of the stopper pin 52 in the forward direction with respect to the conveyance line Q. Become. The stopper pin 52 is moved forward to the conveyance line Q by driving the piston rod 56 of the cylinder device 55 forward. As a result, the leading edge position 51 of the lead frame 12 that is continuously fed from the upstream side is
It is stopped at the pitch conveyance start position 35 in a state where it collides with the stopper pin 52. On the other hand, the stopper pin 52 is moved in the backward direction with respect to the conveyance line Q by driving the piston rod 56 of the cylinder device 55 backward. At the same time, the lower roller 36B of the intermittent feed roller 36, which had been positioned in the non-clamping direction, swings in the direction in which it comes into contact with the lead frame 12, as shown in FIG. As a result, the lead frame 12 positioned at the pitch transport start position 35 is transported in the direction of arrow A with a pitch P.

The slide frame 53 that supports the stopper pin 52 is
It is screwed together with a screw shaft 60 connected to the drive shaft of the slide motor 59, and can be moved in the direction of arrow X by adjusting the drive of the motor 59. As a result, the stopper pin 52 supported by the slide frame 53 can be moved in the direction of the arrow X by driving and adjusting the motor 59, and thereby the pitch conveyance start position 35 where the stopper pin 52 is arranged can also be moved. It becomes possible to adjust the movement in the direction of arrow X. At this time, the drive adjustment of the motor 59 is performed based on a command from the pitch conveyance start position adjustment section 61. That is, the pitch conveyance start position MtJR adjustment section 61 is
According to the pitch P between the adjacent pellet mounting parts 13 of the lead frame 12 supplied from the skim side, the abutting position of the lead frame 12 and the stopper pin 52 is indicated by the arrow X.
It becomes adjustable in the direction. In this adjustment, the stopper pin 52 is moved in the direction of the arrow X so that the position of the leading pellet mounting part 13 of the lead frame 12 that is continuously fed is positioned upstream by an integral multiple of the pitch P with respect to the pellet mounting position 27. It is done in such a way that it moves to That is, the adjustment unit 61 determines the distance E between the leading edge position 51 and the leading pellet mounting portion 13, which varies depending on the type of lead frame 12 being supplied, at the stage when the lead frame 12 is supplied from the upstream side. Further, the adjustment section 61 has a stopper pin 52.
The value of the above-mentioned interval F is adjusted so that the value of the above-mentioned interval F is adjusted between the slide frame 53 and the above-mentioned interval E so that the sum of the interval F between the position of I try to move and adjust.

As a result, the leading pellet mounting section 13 is positioned upstream by an integral multiple of the pitch P with respect to the pellet mounting position 27 with the stopper pin 52 whose movement has been adjusted and the leading edge position 51 of the supplied lead frame 12 colliding with each other. It will be done. In the example shown in FIG. 1, the pellet mounting position 27
The leading pellet mounting part 13 is positioned 7 bits upstream of the stopper pin 5 in this state.
The position No. 2 is the pitch conveyance start position 35 of the supplied lead frame 12.

Moreover, at the same time, the coating nozzle 21 as a coating body is also
The coating nozzle is adjusted in the direction of arrow X based on a command from the coating nozzle movement adjustment section 26. That is, the coating nozzle movement adjustment section 26 adjusts the coating nozzle 21 according to the pitch P between adjacent pellet mounting sections 13 of the lead frame 12 that is supplied from the upstream side and stopped at the pitch conveyance start position 35.
The distance G between the pellet mounting position 27 and the pellet mounting position 27 can be adjusted in the direction of the arrow X. This adjustment is performed by moving the coating nozzle 21 in the X direction so that the coating nozzle 21 is positioned upstream of the pellet mounting position 27 by an integral multiple of the pitch P. In the example shown in FIG. 1, the application nozzle 21 is moved and adjusted 6 pitches upstream with respect to the pellet mounting position 27, and this position becomes the bonding material application position 20.

In this way, the lead frame 12 stopped at the pitch conveyance start position 35 starts pitch conveyance by the withdrawal movement of the stopper pin 52 and the clamping movement of the lower roller 36B. The lead frame 12 thus supplied is
Apply each pellet mounting part 13 to application position 20 and mounting position 2.
It will be pitch conveyed in a state where it is stopped at 7.

A first frame detection sensor 62 is disposed on the upstream side of the stopper pin 52 that is moved and adjusted in the direction of arrow X along the conveyance direction, and a first frame detection sensor 62 is disposed on the downstream side of the stopper pin 52.
A second frame detection sensor 63 is provided. The first frame detection sensor 62 is supported by a fixed frame 64 below the conveyance line Q, and is capable of emitting sensor light R toward the conveyance line Q upstream of the pitch conveyance start position 35 [Fig. reference]. On the other hand, the second frame detection sensor 63 is also supported by the fixed frame 64, and can emit sensor light R toward the conveyance line Q downstream of the pitch conveyance start position 35.

The first frame detection sensor 62 is capable of detecting the passing state of the lead frame 12 supplied from the upstream side, and is capable of controlling the driving state of the continuously feeding rollers 33 and 34 to stop. On the other hand, the second frame detection sensor 63 is capable of detecting the start state of pitch conveyance of the lead frame 12, and starts driving the lifting device (not shown) of the coating nozzle 21.

Thereby, the coating nozzle 21 can apply the bonding material to each pellet mounting portion 13 of the lead frame 12 where the pitch movement is started.

Further, a third frame detection sensor 65 is disposed upstream of the pellet mounting position 27 where the lead frame 12 is supplied in a pitch-conveyed state. The third frame detection sensor 65 is capable of emitting sensor light toward the conveyance line Q, and when the sensor 65 is in an ON state [sensor light shut-off state], the lead that is pitch-conveyed at the stage before the mounting position 27 The passage of the most extreme position 51 of the frame 12 can be detected. As a result, the swinging arm 30 supporting the collet 29 starts operating in the direction of arrow B, and the pellet 28 can be mounted on each pellet mounting section 13 that moves in pitch. Further, the sensor 65 can detect the completion state of conveyance of the lead frame 12 in the OFF state (sensor light passing state).

Next, the operation of the pellet loading device 10 according to the above embodiment will be explained with reference to the flowchart shown in FIG.

First, the lead frame 12 supplied from the upstream side is conveyed in the direction of arrow A by the drive of continuous feed rollers 33 and 34. At this time, the stopper bin 52 is adjusted and moved according to the pitch P between the adjacent pellet mounting portions 13 of the supplied lead frame 12. When the lead frame 12 that is continuously fed in the direction of arrow A passes above the first frame detection sensor 62, the sensor 62 turns ON.
activated. As a result, the continuous feeding rollers 33 and 34 are stopped, and the lead frame 12 being conveyed in the direction of arrow A is stopped in a state where it collides with the stopper bin 52. When the leading edge position 51 of the lead frame 12 collides with the stopper pin 52 and is positioned at the pitch conveyance start position 35, the stopper pin 52 is subsequently moved in the backward direction, and the pitch conveyance of the lead frame 12 starts from this position 35. It will be started.

Pitch conveyance of the lead frame 12 is performed by driving the intermittent rollers 36, 37, and 38, and at this time, the lower roller 36B of the intermittent roller 36 on the most upstream side moves in the direction in which the lead frame 12 is held. It will be shaken.

When pitch conveyance is started and the lead frame 12 passes above the second frame detection sensor 63, the sensor 63 is turned on. As a result, the application nozzle 21 applies the adhesive to each pellet mounting portion 13 that is conveyed in pitch. At this time, the coating nozzle 21 is adjusted to a position upstream of the pellet mounting position 27 by an integral multiple of the pitch P.

As a result, the lead frames 12 that are sequentially conveyed in pitch
Each pellet mounting portion 13 is positioned correspondingly to the coating nozzle 21.

Further, the lead frame 12 to which the bonding material is applied to the pellet mounting portion 13 is connected to the third frame detection sensor 65.
It passes above. The third frame detection sensor 65 is
The collet 29, which is turned on by the passage of the lead frame 12 and holds the pellet 28, is sequentially positioned at the pellet mounting position 27 at the pellet mounting portion 13.
The pellet 28 will be attached to the.

When the rearmost end position 66 of the lead frame 12 having a length L passes above the first frame detection sensor 62,
The sensor 62 will be turned off. As a result, the lower roller 36B of the intermittent feeding roller 36, which had been oscillated in the nipping direction, is again moved in the backward direction with respect to the conveyance line Q.

Furthermore, the rearmost position 66 of the lead frame 12 is located at the second
When the vehicle passes above the frame detection sensor 63, the sensor 63 is turned off. As a result, the stopper pin 52, which had been positioned at the retreated position, is moved forward, and the leading edge position 51 of the lead frame 12, which is then continuously conveyed, abuts against the stopper pin 52. In this manner, the present device 10 is capable of sequentially supplying the pellets 28 from the upstream side and sequentially mounting the pellets 28 on the lead frames 12 having different pitches P.

Next, the operation of the above embodiment will be explained.

According to the pellet mounting device IO according to the above embodiment, the position of the leading pellet mounting portion 13 relative to the pellet mounting position 27 is determined according to the pitch P between adjacent pellet mounting portions 13 of the lead frame 12 supplied from the upstream side. It becomes possible to move and adjust the position of the bonding material application position 20 relative to the pellet mounting position 27 to a position that is an integral multiple of the pitch P. As a result, each pellet mounting portion 13 of the lead frame 12 that is pitch-transferred is placed at the corresponding application position 20.
Then, it is positioned while remaining at the mounting position 27. Therefore, lead frames 1 that are sequentially transported
2, the work of applying the bonding material at the application position 20 and the work of mounting the pellet 28 at the mounting position 27 are performed independently. As a result, each lead frame 1 has a different pitch P between adjacent pellet mounting parts 13.
2, and it becomes possible to smoothly and quickly attach the pellets 28 to each pellet attaching portion 13 of the lead frame 12 being transported.

[Effects of the Invention] As described above, the present invention has a substrate having a constant length and having a plurality of pellet mounting portions arranged at a predetermined pitch P in the longitudinal direction, in a state where the guide portion guides the substrate. At the pellet mounting position where the pellets can be mounted by sequentially applying bonding material to each pellet mounting portion of the board being transported along the longitudinal direction, (a) an upstream application position in the transport direction of the board; is located in
(b) a bonding material applicator that can apply a bonding material to the pellet mounting portion of the board being transported; and (b) a pellet mounting body disposed at a downstream pellet mounting position in the transport direction of the board and coated with the bonding material. (c) a pellet loading body that allows pellets to be attached to the guide section; and (d) the substrate supplied from the upstream side of the guide part, at a pitch conveyance start position where the position of the leading pellet mounting part is upstream of the coating position and is an integral multiple of the pitch P with respect to the pellet mounting position. (e) means for adjusting the pitch conveyance start position of the substrate that can adjust the position of the supplied substrate in the conveyance direction so as to position the substrate; A means for adjusting the movement of the coating body in the transport direction so that the interval between the positions is an integral multiple of the pitch P; The present invention has the advantage that pellets can be attached to each pellet attachment portion of the substrate to be transported smoothly and quickly.

[Brief explanation of drawings]

Fig. 1 is a plan view showing a pellet mounting device according to an embodiment of the present invention, Fig. 2 is a plan view showing the main parts of Fig. 1, and Fig. 3 is a cross section taken along the line ■-■ in Fig. 1. Figure 4 is I of Figure 2.
5 is a sectional view taken along line V-IV in FIG. 2, FIG. 6 is a sectional view taken along line Vl-Vl in FIG. 1, and FIG. 7 is a sectional view taken along line Vl-Vl in FIG. 1. 2 is a flowchart showing the operating sequence of the pellet loading device shown in FIG. lO... Pellet mounting device, IIA, IIB... Guide rail [guiding part], 12... Lead frame [substrate], 13... Pellet mounting part, 20... Bonding material application position, 21 ...Applying nozzle [applying body], 26...
- Application nozzle movement adjustment section, 27... Pellet mounting position, 28... Pellet, 29... Collet [mounted body]
, 35... Pitch conveyance start position, 36.37.38.
. . . Intermittently feeding roller [carrying body], 51 . . . Lead frame leading edge position, 61 . . . Pitch transport start position adjustment unit. Agent Patent Attorney Osamu Shiokawa 4th Session 5 Figure 6 Figure 6

Claims (1)

[Claims] (1) A board having a certain length and having a plurality of pellet mounting parts disposed at a predetermined pitch P in the longitudinal direction is transported along the longitudinal direction while being guided by the guide part, and is At a pellet mounting position where a bonding material can be sequentially applied to each pellet mounting portion of a substrate to allow pellets to be mounted, (a) disposed at an upstream application position in the conveyance direction of the board;
(b) a bonding material applicator that can apply a bonding material to the pellet mounting portion of the board being transported; and (b) a pellet mounting body disposed at a downstream pellet mounting position in the transport direction of the board and coated with the bonding material. (c) a pellet loading body that allows pellets to be attached to the guide section; (d) Position the substrate supplied from the upstream side of the guide part so that the leading pellet mounting part thereof is upstream of the coating position and at a pitch conveyance start position that is an integral multiple of the pitch P with respect to the pellet mounting position. (e) according to the pitch P between adjacent pellet mounting parts;
A pellet mounting device comprising: a movement adjustment means for a coating body that can adjust the movement of the coating body in a conveying direction so that the interval between the coating position and the mounting position is an integral multiple of the pitch P.