TWI875367B - Anti-wrong winding device, wire bonding machine and detecting system thereof - Google Patents

Abstract

An anti-wrong winding device for a wire bonding machine, comprising: a fixed portion fixed on the wire bonding machine; a seat body portion extended outward from the fixed portion and is located correspondingly at a side of a roller unit of the wire bonding machine; and a bend portion extended outward from the seat body portion and is located correspondingly below the roller unit. The present invention further provided a wire bonding machine and a detecting system thereof.

Description

Anti-wrong-wire device, wire bonding machine and its detection system

The present invention relates to semiconductor packaging technology, and in particular to a device for preventing miswiring, a wire bonding machine and a detection system thereof.

In existing semiconductor packaging technology, wire bonding technology (i.e., through gold wire or copper wire, etc.) is used to electrically connect the wire from the electronic component such as the chip to the carrier such as the lead frame or the packaging substrate, and the carrier is then electrically connected to the external device such as the circuit board through the conductive element such as the solder ball.

It is known that wire bonding technology can be used to form an initial ball on a semiconductor device or carrier by a soldering needle under supersonic vibration to perform a ball end pressurization (ball bond) operation, so that the solder pad surface and the ball end are fixed to each other, and then the wire body is extended from the ball to the solder pad surface of another semiconductor device or carrier to perform contact pressurization and heating (bonding) operations, and finally the soldering needle is used to cut off the excess solder wire.

As shown in FIG1 , the known wire bonding machine 1 includes a bobbin unit 11, a roller unit 12, a deflector 13, an airflow guide 14, a tension unit 15, a funnel 16, a wire clamp 17 and a welding needle 18. The welding wire 111 is wound around the bobbin unit 11, and the welding wire 111 is manually pulled to the roller unit 12, and then pulled to the deflector 13, and then sequentially passes through the tension unit 15, the funnel 16 and the wire clamp 17 to reach the welding needle 18.

However, if the welding wire 111 is manually pulled to the top of the roller unit 12 and then to the diverter 13, the welding wire 111 will be in the wrong feeding path, and there will be a risk of abnormal product curvature and arc height, resulting in abnormal product quality and other problems.

Therefore, how to overcome the above-mentioned problems of knowledge and technology has become an urgent issue to be solved.

In view of the various deficiencies of the above-mentioned prior art, the present invention provides a wire winding prevention device for a wire bonding machine, comprising: a fixing portion extending along a first axis and fixedly connected to the wire bonding machine; a seat portion extending outwardly from the fixing portion so as to correspond to the side surface of the roller unit of the wire bonding machine when the fixing portion is fixedly connected to the wire bonding machine; and a bent portion extending outwardly from the seat portion at an angle so as to correspond to the bottom of the roller unit when the fixing portion is fixedly connected to the wire bonding machine.

As in the aforementioned anti-wrong-wire device, the fixing portion, the base portion and the bending portion are formed by bending or welding the metal plate in a metal sheet metal manner.

As mentioned above in the anti-wrong-wire device, the metal plate is a stainless steel plate.

As in the aforementioned anti-winding device, the base body has a connecting plate, a top plate and a side plate. The connecting plate extends outward from one end of the fixing portion along a second axis perpendicular to the first axis. The top plate and the side plate extend outward from two adjacent sides of the connecting plate along a third axis perpendicular to the first axis and the second axis.

As in the aforementioned anti-wrong-wire device, the connecting plate and the fixing portion are L-shaped, and the cross-sections of the top plate and the side plate are L-shaped.

As in the aforementioned anti-wrong-wire device, the angle between the bent portion facing the roller unit and the side plate is less than 180 degrees.

As in the aforementioned anti-wrong-wire device, the seat body further has a limit plate, which is formed to extend outward from the side plate along the second axis so as to correspond to the top end of the adjacent roller unit when the fixing portion is fixed to the wire bonding machine, and the orthographic projection of the limit plate along the third axis overlaps the cross section of the roller unit.

The present invention further provides a wire bonding machine, comprising: a roller unit fixedly connected to the wire bonding machine; and a wire winding prevention device, comprising: a fixing portion extending along a first axis and fixedly connected to the wire bonding machine; a seat portion extending outward from the fixing portion and correspondingly located at the side surface of the roller unit; and a bending portion extending outward from the seat portion at an angle and correspondingly located below the roller unit.

As in the aforementioned wire welding machine, the fixing portion, the seat portion and the bending portion are formed by bending or welding the metal plate in a metal sheet metal manner.

As mentioned above in the wire welding machine, the metal plate is a stainless steel plate.

As in the aforementioned wire bonding machine, the base body has a connecting plate, a top plate and a side plate. The connecting plate is formed by extending outward from one end of the fixing portion along a second axis perpendicular to the first axis. The top plate and the side plate are formed by extending outward from two adjacent sides of the connecting plate along a third axis perpendicular to the first axis and the second axis.

As in the aforementioned wire bonding machine, the connecting plate and the fixing portion are L-shaped, and the cross-sections of the top plate and the side plate are L-shaped.

In the aforementioned wire bonding machine, the angle between the bent portion facing the roller unit and the side plate is less than 180 degrees.

As in the aforementioned wire bonding machine, the seat body further has a limit plate, which is formed by extending outward from the side plate along the second axis and corresponds to the top end of the adjacent roller unit, and the orthographic projection of the limit plate along the third axis overlaps the cross section of the roller unit.

The present invention further provides a detection system for preventing the wire from winding wrongly for a wire bonding machine, comprising: a bobbin unit, fixedly connected to the wire bonding machine and wound with a welding wire; a roller unit, fixedly connected to the wire bonding machine and spaced from the bobbin unit, and for the welding wire to abut against; an anti-winding wrongly device, comprising: a fixing portion, extending along a first axis and fixedly connected to the wire bonding machine; a seat portion, extending outwardly from the fixing portion and correspondingly located on a side surface of the roller unit ; and a bending portion, which is formed by extending outward from the seat portion at an angle and is correspondingly located below the roller unit; and a tension unit, which is located below the roller unit and the anti-winding device and is provided for the welding wire to pass through and is used to detect the tension of the welding wire; wherein, when the welding wire abuts against the roller unit and passes through between the seat portion and the roller unit and contacts the bending portion, the tension of the welding wire detected by the tension unit is defined as abnormal.

As mentioned above, the detection system also includes an alarm unit, which is used to issue an alarm when the tension of the welding wire is abnormal and shut down the welding machine.

As in the aforementioned detection system, when the welding wire abuts against the roller unit, but does not pass between the seat body and the roller unit, and does not touch the bending portion, the tension of the welding wire detected by the tension unit is normal.

As in the aforementioned detection system, the fixing portion, the base portion and the bending portion are formed by bending or welding the metal plate in a metal sheet metal manner.

As mentioned above in the detection system, the metal plate is a stainless steel plate.

As in the aforementioned detection system, the base body has a connecting plate, a top plate and a side plate. The connecting plate is formed by extending outward from one end of the fixing portion along a second axis perpendicular to the first axis. The top plate and the side plate are formed by extending outward from two adjacent sides of the connecting plate along a third axis perpendicular to the first axis and the second axis.

As in the aforementioned detection system, the connecting plate and the fixing portion are L-shaped, and the cross-sections of the top plate and the side plate are L-shaped.

As in the aforementioned detection system, the angle between the bent portion facing the roller unit and the side plate is less than 180 degrees.

As in the aforementioned detection system, the seat body further has a limit plate, which is formed by extending outward from the side plate along the second axis and corresponds to the top end of the adjacent roller unit, and the orthographic projection of the limit plate along the third axis overlaps the cross section of the roller unit.

In summary, the anti-wrong-winding device, the wire bonding machine and its detection system of the present invention can prevent the wire from being pulled to the wrong wire feeding path, and the anti-wrong-winding device is made of metal sheet metal, which is easy to manufacture. In addition, the present invention only needs to lock the anti-wrong-winding device to the wire bonding machine, and there is no need to improve other components in the wire bonding machine. The present invention can avoid the risk of abnormal product curvature and arc height, which in turn leads to problems such as abnormal product quality.

1: Wire welding machine

11: Spool unit

111:Welding wire

12: Rolling unit

13: Steering gear

14: Air flow guide

15: Tension unit

16: Funnel

17: Wire clip

18: Welding needle

2: Anti-wrong-wire device

21: Fixed part

22: Seat body

221:Connection plate

222: Top plate

223: Side panels

224: Limiting plate

23: Bending part

3: Detection system

30: Warning unit

X1: first axis

X2: Second axis

X3: The third axis

Figure 1 is a schematic diagram showing the welding wire in the wire bonding machine being in the wrong feeding path.

Figure 2 is an overall schematic diagram of the anti-wrong-winding device of the present invention.

Figure 3 is a schematic diagram of the wire bonding machine of the present invention equipped with an anti-wrong-wire winding device.

Figure 4 is a block diagram of the anti-wrong-wire detection system of the present invention.

Figure 5 is a schematic diagram showing the welding wire in the wire welding machine of the present invention in the correct wire feeding path.

The following is a specific and concrete example to illustrate the implementation of the present invention. People familiar with this technology can easily understand other advantages and effects of the present invention from the content disclosed in this manual.

It should be noted that the structures, proportions, sizes, etc. depicted in the drawings attached to this specification are only used to match the contents disclosed in the specification for understanding and reading by people familiar with this technology, and are not used to limit the restrictive conditions for the implementation of the present invention. Therefore, they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "top", "side", etc. used in this specification are only for the convenience of description, and are not used to limit the scope of implementation of the present invention. Changes or adjustments to their relative relationships, without substantial changes to the technical content, should also be regarded as the scope of implementation of the present invention.

Please refer to Figure 2. The anti-wrong-wire device 2 for the wire bonding machine of the present invention includes a fixing portion 21, a seat portion 22 and a bending portion 23, wherein the first axis X1, the second axis X2 and the third axis X3 shown in Figure 2 are perpendicular to each other.

The fixing part 21 is in the shape of a long strip extending along the first axis X1, and has through holes formed at two opposite ends thereof for screws to pass through the through holes to lock the fixing part 21 on the wire welding machine.

The seat body 22 includes a connecting plate 221, a top plate 222, a side plate 223 and a limiting plate 224. The connecting plate 221 is a square plate, extending outward from one end of the fixing portion 21 along the second axis X2, whereby the connecting plate 221 and the fixing portion 21 are L-shaped. The top plate 222 and the side plate 223 are connected to each other at an angle, and extend outward from two adjacent sides of the connecting plate 221 along the third axis X3, whereby the cross-sections of the top plate 222 and the side plate 223 are L-shaped. The limiting plate 224 extends outward from one end of the side plate 223 away from the connecting plate 221 along the second axis X2, and its orthographic projection along the third axis X3 does not overlap with the connecting plate 221. In this embodiment, the connecting plate 221 and the top plate 222 can be clamped at 90 degrees, the side plate 223 and the top plate 222 and the connecting plate 221 can be clamped at 90 degrees respectively, and the limiting plate 224 and the side plate 223 can be clamped at 90 degrees, but it is not limited to this.

The bent portion 23 extends outward from the side plate 223 of the seat portion 22 at an angle, and the angle between the bent portion 23 and the side plate 223 is less than 180 degrees.

In this embodiment, the fixing portion 21, the base portion 22 and the bent portion 23 are formed by bending or welding a metal plate in a metal sheet metal manner, wherein the metal plate can be a stainless steel plate (SUS304), but is not limited thereto.

Please refer to Figure 3. The wire bonding machine 1 of the present invention includes a spool unit 11, a roller unit 12, a deflector 13, an air flow guide 14, a tension unit 15, a funnel 16, a wire clamp 17, a welding needle 18 and the anti-wrong-wire device 2 shown in Figure 2 (the technical content has been described above and will not be repeated here).

The bobbin unit 11 is fixed to the wire bonding machine 1 and is wound with a welding wire 111. The roller unit 12 is fixed to the wire bonding machine 1 along the third axis X3 and is spaced from the bobbin unit 11, and can be abutted by the welding wire 111. The anti-wrong-wire device 2 is fixed to the wire bonding machine 1 so that the side plate 223 of the seat portion 22 is located correspondingly to the side surface of the roller unit 12, the bent portion 23 is located correspondingly below the roller unit 12, and the angle between the bent portion 23 facing the roller unit 12 and the side plate 223 is less than 180 degrees. The limit plate 224 corresponds to the top of the adjacent roller unit 12, and its orthographic projection along the third axis X3 overlaps with the cross-section of the roller unit 12, thereby preventing the welding wire 111 from falling off the roller unit 12. The deflector 13 and the airflow guide 14 are located below the roller unit 12 and the anti-wrong wire winding device 2, and the welding wire 111 is passed through. The tension unit 15 is located below the deflector 13 and the welding wire 111 is passed through, so that the tension unit 15 can detect the tension of the welding wire 111. After the welding wire 111 passes through the tension unit 15, the funnel 16, the wire clamp 17 and the welding needle 18 are passed through in sequence.

Please refer to FIG. 4 together. The present invention is used for the detection system 3 for preventing the wire winding error of the wire bonding machine, which includes a bobbin unit 11, a roller unit 12, an anti-wire winding device 2, a tension unit 15 and a warning unit 30. The technical contents of the bobbin unit 11, the roller unit 12, the anti-wire winding device 2 and the tension unit 15 are the same as the above technical contents, and will not be repeated here.

Please refer to FIG. 3 at the same time. In the present embodiment, after the welding wire 111 abuts the roller unit 12, if it is further inserted between the seat portion 22 and the roller unit 12 and contacts the outer edge of the bending portion 23, that is, the welding wire 111 abuts the roller unit 12 and is in an erroneous feeding path, the tension of the welding wire 111 detected by the tension unit 15 will be defined as abnormal. At this time, the warning unit 30 can issue a warning (such as a chirping sound or a lighting effect) according to the abnormal tension and stop the welding machine 1. At this time, the operator can pull the welding wire 111 to the correct wire feeding path. As shown in FIG5 , when the welding wire 111 abuts against the left side of the roller unit 12 and does not pass through the seat portion 22 and the roller unit 12, and does not touch the outer edge of the bending portion 23, the tension of the welding wire 111 detected by the tension unit 15 will be defined as normal, and the welding machine 1 can be restarted.

In one embodiment, the detection system 3 of the present invention may not use the tension of the bonding wire 111 detected by the tension unit 15 to stop or start the bonding machine 1, but use the original detection system (Bond Integrity Test System, BITS) of the bonding machine 1. When the bonding wire 111 contacts the anti-winding device 2 (i.e., the wrong wire routing), the signal is conducted to the metal casing (ground) of the bonding machine 1 through the anti-winding device 2, and the original detection system of the bonding machine 1 will sound abnormal and cannot be operated. At this time, the operator can pull the welding wire 111 to the correct routing path to prevent the signal from being grounded through the anti-wrong-wire device 2, and the welding machine 1 can be restarted.

In summary, the anti-wrong-winding device, the wire bonding machine and its detection system of the present invention can prevent the wire from being pulled to the wrong wire feeding path, and the anti-wrong-winding device is made of metal sheet metal, which is easy to manufacture. In addition, the present invention only needs to lock the anti-wrong-winding device to the wire bonding machine, and there is no need to improve other components in the wire bonding machine. The present invention can avoid the risk of abnormal product curvature and arc height, which in turn leads to problems such as abnormal product quality.

1: Wire welding machine

11: Spool unit

111:Welding wire

12: Rolling unit

13: Steering gear

14: Air flow guide

15: Tension unit

16: Funnel

17: Wire clip

18: Welding needle

21: Fixed part

221:Connection plate

222: Top plate

223: Side panels

224: Limiting plate

23: Bending part

Claims (20)

A wire winding prevention device for a wire bonding machine comprises: a fixing portion extending along a first axis and fixedly connected to the wire bonding machine; a seat portion extending outwardly from the fixing portion so as to correspond to a side surface of a roller unit of the wire bonding machine when the fixing portion is fixedly connected to the wire bonding machine, wherein the seat portion has a connecting plate, a top plate and a side plate, and the connecting plate is perpendicular to the first axis. The second axis of the first axis is formed by extending outward from one end of the fixing portion, and the top plate and the side plate are respectively extended outward from two adjacent sides of the connecting plate along a third axis perpendicular to the first axis and the second axis; and the bending portion is formed by extending outward from the side plate at an angle so as to be located below the roller unit when the fixing portion is fixed to the wire bonding machine. The anti-wrong-wire device as described in claim 1, wherein the fixing portion, the seat portion and the bending portion are formed by bending or welding the metal plate in a metal sheet metal manner. The miswiring prevention device as described in claim 2, wherein the metal plate is a stainless steel plate. The anti-wrong-wire device as described in claim 1, wherein the connecting plate and the fixing portion are L-shaped, and the cross-sections of the top plate and the side plate are L-shaped. The anti-wrong-wire device as described in claim 1, wherein the angle between the bent portion facing the roller unit and the side plate is less than 180 degrees. The anti-wrong-wire device as described in claim 1, wherein the seat body further has a limit plate, the limit plate is formed to extend outward from the side plate along the second axis so as to correspond to the top end of the adjacent roller unit when the fixing portion is fixed to the wire bonding machine, and the orthographic projection of the limit plate along the third axis overlaps the cross section of the roller unit. A wire bonding machine, comprising: a roller unit, fixed to the wire bonding machine; and a wire winding prevention device, comprising: a fixing portion, extending along a first axis and fixed to the wire bonding machine; a seat portion, extending outward from the fixing portion and correspondingly located at the side surface of the roller unit, wherein the seat portion has a connecting plate, a top plate and a side plate, the connecting plate extending outward from one end of the fixing portion along a second axis perpendicular to the first axis, the top plate and the side plate extending outward from two adjacent sides of the connecting plate along a third axis perpendicular to the first axis and the second axis; and a bending portion, extending outward from the side plate at an angle and correspondingly located below the roller unit. The wire welding machine as described in claim 7, wherein the fixing portion, the seat portion and the bending portion are formed by bending or welding the metal plate in a metal sheet metal manner. A wire welding machine as described in claim 8, wherein the metal plate is a stainless steel plate. A wire bonding machine as described in claim 7, wherein the connecting plate and the fixing portion are L-shaped, and the cross-sections of the top plate and the side plate are L-shaped. A wire bonding machine as described in claim 7, wherein the angle between the bent portion facing the roller unit and the side plate is less than 180 degrees. The wire bonding machine as described in claim 7, wherein the seat body further has a limit plate, the limit plate is formed extending outward from the side plate along the second axis and corresponds to the top end of the adjacent roller unit, and the orthographic projection of the limit plate along the third axis overlaps the cross section of the roller unit. A wire winding detection system for a wire bonding machine includes: a bobbin unit, fixedly connected to the wire bonding machine and wound with a welding wire; a roller unit, fixedly connected to the wire bonding machine and spaced from the bobbin unit, and for the welding wire to abut against; a wire winding prevention device, including: a fixing portion, extending along a first axis and fixedly connected to the wire bonding machine; a seat portion, extending outward from the fixing portion and corresponding to the side surface of the roller unit, wherein the seat portion has a connecting plate, a top plate and a side plate, and the connecting plate extends outward from one end of the fixing portion along a second axis perpendicular to the first axis. The top plate and the side plate are respectively extended outward from two adjacent sides of the connecting plate along a third axis perpendicular to the first axis and the second axis; and a bending portion is formed by extending outward from the side plate at an angle and is correspondingly located below the roller unit; and a tension unit is located below the roller unit and the anti-winding device, and is provided for the welding wire to pass through and is used to detect the tension of the welding wire; wherein, when the welding wire abuts the roller unit and passes through between the seat body and the roller unit, and contacts the bending portion, the tension of the welding wire detected by the tension unit is defined as abnormal. The detection system as described in claim 13 further includes an alarm unit for issuing an alarm when the tension of the welding wire is abnormal and shutting down the welding machine. As described in claim 13, the detection system, wherein when the welding wire abuts against the roller unit but does not pass between the seat and the roller unit, and does not contact the bending portion, the tension of the welding wire detected by the tension unit is normal. The detection system as described in claim 13, wherein the fixing portion, the base portion and the bending portion are formed by bending or welding the metal plate in a metal sheet metal manner. A detection system as described in claim 16, wherein the metal plate is a stainless steel plate. The detection system as described in claim 13, wherein the connecting plate and the fixing portion are L-shaped, and the cross-sections of the top plate and the side plate are L-shaped. A detection system as described in claim 13, wherein the angle between the bent portion facing the roller unit and the side plate is less than 180 degrees. As described in claim 13, the base body further comprises a limit plate, which is formed by extending outward from the side plate along the second axis and corresponds to the top end of the adjacent roller unit, and the orthographic projection of the limit plate along the third axis overlaps the cross section of the roller unit.

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