Preparation method of copper alloy gold-plated bonding wire

Abstract

The invention discloses a preparation method of a copper alloy gold-plated bonding wire, and relates to the technical field of bonding wires, a port of a triangular collection box is utilized to scrape copper crystal grains deposited on the surface of a descending cathode copper foil sheet, the copper crystal grains are collected in the triangular collection box, and the situation that the copper crystal grains, the copper foil sheet and copper on the copper foil sheet flow into the next process is replaced. The consumption of the copper foil is reduced, the production cost is further reduced, meanwhile, scraped copper is copper crystal grains instead of copper blocks, the crystal grains can be molten more quickly during subsequent smelting, the subsequent smelting time is further shortened, electrolysis in the electrolytic tank is monitored through the gas outlet mechanism, and if electrolysis stops, oxygen is stopped to be generated, and the production efficiency is improved. The compressed first spring rebounds to drive the limiting plate to extrude the pressure sensor embedded in the baffle, the motor is controlled by the controller to operate, the next process is carried out, electrolysis in the electrolytic tank can be detected, it is guaranteed that liquid discharging and copper scraping operation can be achieved in the first time after electrolysis is finished, and automation is better achieved.

Description

Technical Field

[0001] The invention relates to the technical field of bonding wires, in particular to a method for preparing a copper alloy gold-plated bonding wire. Background Art

[0002] The bonding process of microelectronic device chips refers to the use of ultrasonic pressure at a certain temperature to weld the two ends of the bonding wire to the chip disk and the lead frame pins respectively, so as to achieve the connection between the internal circuit of the chip and the external circuit. Early bonding wires were mostly made of pure gold, and most manufacturers still use pure gold bonding wires today. With the increasing scarcity of precious metal resources, the price of gold continues to rise, and the cost of microelectronic packaging has risen sharply, bringing unbearable cost pressure to manufacturers and users. Therefore, the industry is actively seeking new bonding wire materials with relatively low R&D costs, stable and reliable performance, and convenient and reliable processing.

[0003] At present, the research and application of replacing gold bonding wire is mostly concentrated on copper-based bonding wire. Gold plating operation is performed on the basis of copper alloy bonding wire to elongate copper alloy gold-plated bonding wire. In the production process of copper alloy bonding wire, the first step is to extract high-purity copper. The current common method is to use copper nitrate electrolysis to allow high-purity copper to be deposited on the cathode high-purity copper foil, and then the deposited high-purity copper is transported together with the copper foil to the next process operation, which will result in the consumption of a certain amount of high-purity copper foil. However, high-purity copper foil is expensive. Each electrolysis must consume a piece of copper foil, resulting in high manufacturing costs. At the same time, the concentrations of high-purity copper foil and electrolyzed high-purity copper are still different. The doping of the two will cause the subsequent copper purity to decrease, thereby affecting the quality of the subsequent copper alloy bonding wire products. Therefore, technicians in this field have proposed a method for preparing copper alloy gold-plated bonding wire. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a method for preparing a copper alloy gold-plated bonding wire, which solves the above-mentioned problems.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a method for preparing copper alloy gold-plated bonding wire, comprising an electrolysis mechanism, a moving mechanism, a copper removal mechanism, an air outlet mechanism and a liquid outlet mechanism, wherein the moving mechanism is installed on the side of the electrolysis mechanism, the copper removal mechanism is arranged inside the electrolysis mechanism, the air outlet mechanism is installed on the upper surface of the electrolysis mechanism, and the liquid outlet mechanism is installed on the lower surface of the electrolysis mechanism, the electrolysis mechanism is used for electrolysis, the moving mechanism is used for moving the upper cover, the air outlet mechanism is used for air outlet, and the liquid outlet mechanism is used for liquid discharge, characterized in that the copper removal mechanism comprises a moving component and a storage box installed thereon, when the moving mechanism drives the cathode copper foil to descend, the moving component drives two triangular storage box combinations, so that the descending cathode copper foil passes through the openings of the two triangular storage boxes, and the copper grains deposited on the surface of the cathode copper foil are scraped off by using the opening port and collected in the triangular collection box.

[0006] As a further technical solution of the present invention, the electrolysis mechanism includes an electrolytic cell, an upper port of the electrolytic cell is provided with an upper cover, a cathode copper foil is installed on the lower surface of the upper cover, an anode sheet is installed on the lower surface of the upper cover on one side of the cathode copper foil, an input pipe is installed on the rear surface of the electrolytic cell near the upper port, an electromagnetic valve is installed on the input pipe near the electrolytic cell, and a controller is installed on the front surface of the electrolytic cell.

[0007] As a further technical solution of the present invention, the copper removal mechanism includes two rectangular plates installed on the inner wall of the electrolytic cell, a bidirectional screw is rotatably installed between the two rectangular plates, each thread of the bidirectional screw is provided with a first thread seat, a mounting rod is installed on the side of each first thread seat, a triangular storage box is installed on the end of each mounting rod on one side of the cathode copper foil, an opening matching the cathode copper foil is opened at the port of each triangular storage box, a U-shaped plate is installed on the upper port of each triangular storage box, both ends of the bidirectional screw pass through the rectangular plates and are installed with overrunning clutches, one of the overrunning clutches extends to the outside of the electrolytic cell and is installed with a first gear, the other overrunning clutch extends to the outside of the electrolytic cell and is installed with a second gear, a first rack matching the first gear is installed on the side of the upper cover, and a second rack matching the second gear is installed on the other side of the upper cover.

[0008] As a further technical solution of the present invention, the moving mechanism includes moving seats installed on both sides of the electrolytic cell, each of the moving seats is provided with a moving groove on the side, a one-way screw is rotatably installed in each of the moving grooves, each of the one-way screws is provided with a second threaded seat adapted to the moving groove, and a mounting frame connected to the upper cover is installed on the side of each of the second threaded seats, the lower end of each of the one-way screws extends to the outside of the moving seat and is installed with a synchronous wheel, and a synchronous belt is jointly provided on the two synchronous wheels, a motor is installed on the upper end of one of the moving seats, and the driving end of the motor extends into the moving groove and is fixedly connected to the corresponding upper end of the one-way screw.

[0009] As a further technical solution of the present invention, the air outlet mechanism includes an upper tube with a closed upper port installed on the upper surface of the upper cover near the edge, a baffle installed inside the upper tube, a piston matching the upper tube is arranged below the baffle in the upper tube, a round rod is installed in the center of the upper surface of the piston, the upper end of the round rod extends to the upper surface of the baffle and is installed with a limit plate, a first spring is arranged above the limit plate in the upper tube, a pressure sensor is embedded in the upper surface of the baffle, and an air outlet pipe is installed on the side of the upper tube between the piston and the baffle.

[0010] As a further technical solution of the present invention, the liquid outlet mechanism includes a mounting seat installed on the lower surface of the electrolytic cell directly below the upper tube, a hollow groove is opened inside the mounting seat, a hollow cavity is opened inside the mounting seat on one side of the hollow groove, a slide is slidably arranged in the cavity, a second spring is arranged in the cavity on one side of the slide, a baffle extending into the hollow groove and blocking it is installed at the center of the other side surface of the slide, a pipeline extending into the electrolytic cell is installed on the inner top surface of the hollow groove, and an output pipe extending to the outside is installed at the center of the inner bottom surface of the hollow groove.

[0011] As a further technical solution of the present invention, a bottom plate is installed on the rear surface of the electrolytic cell, an upper plate is installed on the rear surface of the electrolytic cell just above the bottom plate, a sliding rod is installed between the bottom plate and the upper plate, a magnet is slidably arranged on the sliding rod, a pulley is installed on the rear surface of the electrolytic cell just below the magnet, a pull rope is installed at the side center of the slide board, extending to the outside of the mounting seat, bypassing the pulley and fixedly connected to the magnet, an L-shaped plate is installed on the rear surface of the upper cover just above the magnet, and a metal plate whose lower surface contacts the magnet is installed at the lower end of the L-shaped plate.

[0012] The specific steps include: S1. Connect the input pipe to the output end of the copper nitrate delivery device, open the solenoid valve, and allow the copper nitrate solution to enter the electrolytic cell through the input pipe until the liquid level is at the same height as the bottom of the triangular storage box. Then close the solenoid valve, and the addition of copper nitrate is completed; S2. The cathode copper foil and the anode sheet are energized to form an electrolytic cell inside the electrolytic cell. The copper ions in the copper nitrate solution are converted into copper by the electrons near the cathode copper foil, and then high-purity copper grains are deposited on the surface of the cathode copper foil. At the same time, oxygen bubbles are formed near the anode. As more and more oxygen is added, the air pressure in the electrolytic cell increases and squeezes the piston upward. The upward piston drives the limit plate to rise through the round rod. The rising limit plate compresses the first spring until the piston moves to above the connection port between the outlet pipe and the upper pipe. Then, the oxygen generated in the electrolytic cell is discharged through the outlet pipe. S3. When the copper ions in the copper nitrate in the electrolytic cell are consumed, the oxygen production decreases, and then the air pressure in the electrolytic cell decreases. The compressed first spring rebounds and drives the limit plate to descend. The descending limit plate drives the piston to descend through the round rod. When the first spring recovers, the limit plate squeezes the pressure sensor embedded in the upper surface of the baffle. When the pressure sensor is pressurized, it means that the electrolytic reaction in the electrolytic cell will stop, and a signal is sent to the controller, and the controller controls the motor to run. S4, the running motor drives the one-way screw to rotate, and the rotating one-way screw drives another one-way screw to rotate in the same direction through the synchronous wheel and the synchronous belt, driving the two second thread seats to rise, and the two rising second thread seats drive the upper cover to rise through the mounting frame, and the rising upper cover will drive the cathode copper foil and the anode sheet to rise; S5. The rising upper cover will drive the metal plate to rise through the L-shaped plate. Since the magnet is connected to the metal plate by magnetic force, the rising metal plate will drive the magnet to rise until the magnet contacts the upper plate. Due to the limit of the upper plate, the metal plate that continues to rise is separated from the magnet. Since the magnetic magnet is magnetically connected to the upper plate, the rising magnet pulls the slide plate to move through the pull rope. The moving slide plate compresses the second spring and also drives the baffle plate to move, so that the empty slot is opened. After that, the used copper nitrate electrolyte in the electrolytic cell is discharged through the empty slot and the output pipe. S6. The rising upper cover will also drive the first rack to rise. The rising first rack meshes with the first gear and drives the first gear to rotate. The rotating first gear drives the two-way screw to rotate through the overrunning clutch. The rotating two-way screw drives the two first threaded seats to move away from each other, and then drives the two triangular storage boxes to move away from each other, so that the cathode copper foil with copper grains deposited on the surface passes between the two triangular storage boxes. After the first rack that continues to rise disengages from the first gear, the two triangular storage boxes remain stationary until the cathode copper foil moves above the triangular storage boxes. At this time, the second rack meshes with the second gear. The rising second rack drives the second gear to reverse. The reversed second gear drives the two-way screw to reverse through the overrunning clutch, and then drives the two triangular storage boxes to approach each other until the two triangular storage boxes touch. S7, then the motor drives the one-way screw to reverse, and the two second threaded seats are lowered through the ascending operation, thereby driving the upper cover to descend, and the descending upper cover will drive the second gear to rotate through the second rack, and the rotating second gear will not drive the two-way screw to rotate due to the overrunning clutch, and then the descending upper cover will drive the cathode copper foil to pass through the opening ports of the two triangular storage boxes, and the copper grains deposited on the surface of the cathode copper foil passing through the opening ports are scraped off and collected in the triangular storage box, and the descending first rack will drive the first gear to reverse after meshing with the first gear, and the two-way screw will not be driven to reverse through the overrunning clutch, and when the upper cover moves to the electrolytic cell port, the scraping is completed; S8. The metal plate will be driven down by the descending upper cover. When the descending metal plate contacts the magnet, it will press down the magnet to separate it from the upper plate. Then the second spring rebounds to drive the slide plate to restore its position. The restored slide plate will restore the baffle position to block the empty slot. Then the solenoid valve is opened, and copper nitrate liquid is re-added into the electrolytic cell through the input pipe. Then the above operation is repeated to continue electrolysis. Then the copper grains collected multiple times are taken out from the triangular storage box, and then they are cleaned and dried and flow into the next process.

[0013] The present invention provides a method for preparing a copper alloy gold-plated bonding wire. Compared with the prior art, the method has the following beneficial effects: 1. A method for preparing a copper alloy gold-plated bonding wire. The device is provided with a copper removal mechanism. Each time the copper nitrate liquid is changed, the cathode copper foil is driven to rise by the moving mechanism. Then, when the cathode copper foil descends, the cathode copper foil is allowed to pass through the openings of two triangular collecting boxes. The copper crystal grains deposited on the surface of the descending cathode copper foil are scraped off by using the ports of the triangular collecting boxes, and collected in the triangular collecting boxes, instead of flowing into the next process together with the copper foil and the copper thereon, thereby reducing the consumption of the copper foil and thus reducing the production cost. At the same time, the scraped copper is copper crystal grains, not copper blocks, so that the crystal grains can be removed faster when smelting is required later. Melting, thereby accelerating the subsequent smelting time, and the amount of copper used for subsequent smelting is all scraped high-purity copper, without copper foil, and the subsequent copper purity will not change, ensuring the quality of the copper alloy gold-plated bonding wire, and then using the gas outlet mechanism to monitor the electrolysis in the electrolytic cell. If the electrolysis stops and the oxygen stops extending, the compressed first spring will rebound and drive the limit plate to squeeze the embedded pressure sensor on the baffle, so that the motor is controlled by the controller to run and implement the next process. The electrolysis in the electrolytic cell can be detected to ensure that the liquid can be drained and the copper scraping operation can be realized as soon as possible after the electrolysis is completed. There is no need for manual follow-up by the staff, which is more automated. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The schematic diagram of the structure is a method for preparing a copper alloy gold-plated bonding wire; Figure 2A side view of a method for preparing a copper alloy gold-plated bonding wire; Figure 3 A cross-sectional view of a method for preparing a copper alloy gold-plated bonding wire; Figure 4 A longitudinal sectional view of a method for preparing a copper alloy gold-plated bonding wire; Figure 5 for Figure 4 Enlarged view of part A in the middle; Figure 6 for Figure 4 Enlarged view of part B; Figure 7 A schematic diagram of a method for preparing a copper alloy gold-plated bonding wire in an upper cover open state; Figure 8 The present invention is a schematic diagram of the structure of the copper removal mechanism in the method for preparing the copper alloy gold-plated bonding wire.

[0015] In the figure: 1, electrolytic cell; 2, rectangular plate; 3, bidirectional screw; 4, first threaded seat; 5, mounting rod; 6, triangular storage box; 7, opening; 8, shaped plate; 9, overrunning clutch; 10, first gear; 11, second gear; 12, first rack; 13, second rack; 14, moving seat; 15, moving slot; 16, one-way screw; 17, motor; 18, second threaded seat; 19, mounting frame; 20, synchronous wheel; 21, synchronous belt; 22, upper cover; 23, cathode copper Foil; 24, anode plate; 25, upper tube; 26, baffle; 27, piston; 28, round rod; 29, limit plate; 30, first spring; 31, mounting seat; 32, slot; 33, cavity; 34, slide plate; 35, baffle; 36, output tube; 37, second spring; 38, pulley; 39, bottom plate; 40, upper plate; 41, slide bar; 42, magnet; 43, pull rope; 44, L-shaped plate; 45, metal plate; 46, input tube; 47, solenoid valve; 48, outlet pipe. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] See also Figure 1-8The present invention provides a technical solution for a method for preparing a gold-plated copper alloy bonding wire: the method for preparing a gold-plated copper alloy bonding wire comprises an electrolysis mechanism, a moving mechanism, a copper removal mechanism, a gas outlet mechanism and a liquid outlet mechanism, wherein the moving mechanism is installed on the side of the electrolysis mechanism, the copper removal mechanism is arranged inside the electrolysis mechanism, the gas outlet mechanism is installed on the upper surface of the electrolysis mechanism, and the liquid outlet mechanism is installed on the lower surface of the electrolysis mechanism, the electrolysis mechanism is used for electrolysis, the moving mechanism is used for moving the upper cover, the gas outlet mechanism is used for gas outlet, and the liquid outlet mechanism is used for liquid discharge, the copper removal mechanism comprises a moving component and a storage box installed thereon, when the moving mechanism drives the cathode copper foil to descend, the moving component drives two triangular storage boxes to be assembled, so that the descending cathode copper foil passes through the openings of the two triangular storage boxes, and the cathode copper foil is discharged by the moving component. The open port scrapes off the copper grains deposited on the surface of the cathode copper foil and collects them in a triangular collecting box. The copper removal mechanism includes two rectangular plates 2 installed on the inner wall of the electrolytic cell 1, and a bidirectional screw 3 is rotatably installed between the two rectangular plates 2. A first thread seat 4 is provided on each thread of the bidirectional screw 3, and a mounting rod 5 is installed on the side of each first thread seat 4. A triangular storage box 6 is installed on the end of each mounting rod 5 on one side of the cathode copper foil 23, and an opening 7 adapted to the cathode copper foil 23 is opened at the port of each triangular storage box 6. A U-shaped plate 8 is installed on the upper port of each triangular storage box 6. Both ends of the bidirectional screw 3 pass through the rectangular plate 2 and are installed with an overrunning clutch 9, one of which extends to A first gear 10 is installed on the outside of the electrolytic cell 1, and another overrunning clutch 9 extends to the outside of the electrolytic cell 1 and is installed with a second gear 11. A first rack 12 adapted to the first gear 10 is installed on the side of the upper cover 22, and a second rack 13 adapted to the second gear 11 is installed on the other side of the upper cover 22. When in use, the rising upper cover 22 will also drive the first rack 12 to rise, and the rising first rack 12 will drive the first gear 10 to rotate after meshing with the first gear 10. The rotating first gear 10 drives the bidirectional screw 3 to rotate through the overrunning clutch 9, and the rotating bidirectional screw 3 drives the two first threaded seats 4 to move away from each other, thereby driving the two triangular storage boxes 6 to move away from each other, so that the cathode copper foil 23 with copper grains deposited on the surface can pass. After the cathode copper foil 23 passes between the two triangular storage boxes 6 and the first rack 12 that continues to rise disengages from the first gear 10, the two triangular storage boxes 6 remain stationary until the cathode copper foil 23 moves above the triangular storage box 6. At this time, the second rack 13 engages with the second gear 11, and the rising second rack 13 drives the second gear 11 to reverse. The reversed second gear 11 drives the bidirectional screw 3 to reverse through the overrunning clutch 9, thereby driving the two triangular storage boxes 6 to approach each other until the two triangular storage boxes 6 are in contact. After that, the descending upper cover 22 will drive the cathode copper foil 23 to pass through the opening 7 ports of the two triangular storage boxes 6, and use the ports of the opening 7 to scrape off the copper grains deposited on the surface of the cathode copper foil 23 passing through, and collect them in the triangular storage box 6.

[0018] See also Figure 1-3 The moving mechanism includes a moving seat 14 installed on both sides of the electrolytic cell 1, and each moving seat 14 is provided with a moving groove 15 on the side, and a one-way screw 17 is rotatably installed in each moving groove 15, and each one-way screw 17 is provided with a second threaded seat 18 adapted to the moving groove 15, and each second threaded seat 18 is provided with a mounting frame 19 connected to the upper cover 22 on the side, and the lower end of each one-way screw 17 extends to the outside of the moving seat 14 and is provided with a synchronous wheel 20, and a synchronous belt 21 is provided on the two synchronous wheels 20, wherein A motor 16 is installed at the upper end of a movable seat 14, and the driving end of the motor 16 extends into the movable groove 15 and is fixedly connected to the upper end of the corresponding one-way screw 17. When in use, the motor 16 drives the one-way screw 17 to rotate, and the rotating one-way screw 17 drives another one-way screw 17 to rotate in the same direction through the synchronous wheel 20 and the synchronous belt 21, driving the two second threaded seats 18 to rise, and the two rising second threaded seats 18 drive the upper cover 22 to rise through the mounting frame 19, and the rising upper cover 22 will drive the cathode copper foil 23 and the anode sheet 24 to rise.

[0019] See also Figure 2 , Figure 4 and Figure 6-7The liquid discharge mechanism includes a mounting seat 31 mounted on the lower surface of the electrolytic cell 1 directly below the upper tube 25, a slot 32 is provided inside the mounting seat 31, a cavity 33 is provided inside the mounting seat 31 on one side of the slot 32, a slide plate 34 is slidably provided in the cavity 33, a second spring 37 is provided in the cavity 33 on one side of the slide plate 34, a baffle 35 extending into the slot 32 and blocking it is installed at the center of the other side of the slide plate 34, a pipeline extending into the electrolytic cell 1 is installed on the inner top surface of the slot 32, an output pipe 36 extending to the outside is installed at the center of the inner bottom surface of the slot 32, a bottom plate 39 is installed on the rear surface of the electrolytic cell 1, an upper plate 40 is installed on the rear surface of the electrolytic cell 1 directly above the bottom plate 39, a slide bar 41 is installed between the bottom plate 39 and the upper plate 40, a magnet 42 is slidably provided on the slide bar 41, a pulley 38 is installed on the rear surface of the electrolytic cell 1 directly below the magnet 42, and a side center of the slide plate 34 is installed A pull rope 43 is extended to the outside of the mounting seat 31, bypasses the pulley 38 and is fixedly connected to the magnet 42. An L-shaped plate 44 is installed on the rear surface of the upper cover 22 just above the magnet 42. A metal plate 45 whose lower surface contacts the magnet 42 is installed at the lower end of the L-shaped plate 44. When in use, the rising upper cover 22 will drive the metal plate 45 to rise through the L-shaped plate 44. Since the magnetic force of the magnet 42 is connected to the metal plate 45, the rising metal plate 45 will drive the magnet 42 to rise until the magnet 42 contacts the upper plate 40. Due to the limitation of the upper plate 40, the metal plate 45 that continues to rise is separated from the magnet 42. Since the magnetic magnet 42 is magnetically connected to the upper plate 40, the rising magnet 42 pulls the slide plate 34 to move through the pull rope 43. The moving slide plate 34 compresses the second spring 37 and also drives the baffle 35 to move, so that the empty slot 32 is opened. After that, the used copper nitrate electrolyte in the electrolytic cell 1 is discharged through the empty slot 32 and the output pipe 36.

[0020] See also Figure 4-5The air outlet mechanism includes a closed upper tube 25 with an upper port installed on the upper surface of the upper cover 22 near the edge, a baffle 26 is installed inside the upper tube 25, a piston 27 adapted to the upper tube 25 is arranged below the baffle 26, a round rod 28 is installed at the center of the upper surface of the piston 27, the upper end of the round rod 28 extends to the upper surface of the baffle 26 and is installed with a limit plate 29, a first spring 30 is arranged above the limit plate 29 in the upper tube 25, a pressure sensor is embedded in the upper surface of the baffle 26, and the side of the upper tube 25 is between the piston 27 and the baffle 26 An air outlet pipe 48 is installed in the middle. When in use, when the copper ions in the copper nitrate in the electrolytic cell 1 are consumed, the oxygen production decreases, and then the air pressure in the electrolytic cell 1 decreases, and the compressed first spring 30 rebounds to drive the limit plate 29 to descend. The descending limit plate 29 drives the piston 27 to descend through the round rod 28. When the first spring 30 recovers, the limit plate 29 will squeeze the pressure sensor embedded in the upper surface of the baffle 26. When the pressure sensor is subjected to pressure, it means that the electrolytic reaction in the electrolytic cell 1 is about to stop, and a signal is sent to the controller, and the controller controls the motor 16 to run.

[0021] See also Figure 1-3 The electrolysis mechanism includes an electrolytic cell 1, an upper port of the electrolytic cell 1 is provided with an upper cover 22, a cathode copper foil 23 is installed on the lower surface of the upper cover 22, an anode sheet 24 is installed on the lower surface of the upper cover 22 on one side of the cathode copper foil 23, an input pipe 46 is installed on the rear surface of the electrolytic cell 1 near the upper port, an electromagnetic valve 47 is installed on the input pipe 46 near the electrolytic cell 1, and a controller is installed on the front surface of the electrolytic cell 1. When in use, the cathode copper foil 23 and the anode sheet 24 are energized to form an electrolytic cell inside the electrolytic cell 1, and the copper ions in the copper nitrate solution are converted into copper by electrons near the cathode copper foil 23, and then high-purity copper grains are deposited on the surface of the cathode copper foil 23, and oxygen bubbles are formed near the anode.

[0022] The specific steps include: S1, connect the input pipe 46 to the output end of the copper nitrate delivery device, open the solenoid valve 47, and the copper nitrate solution enters the electrolytic cell 1 through the input pipe 46 until the liquid level is at the same height as the bottom of the triangular storage box 6, then close the solenoid valve 47, and the addition of copper nitrate is completed; S2, the cathode copper foil 23 and the anode sheet 24 are energized to form an electrolytic cell inside the electrolytic cell 1, and the copper ions in the copper nitrate solution are converted into copper by the electrons near the cathode copper foil 23, and then high-purity copper grains are deposited on the surface of the cathode copper foil 23, and oxygen bubbles are formed near the anode. As more and more oxygen is generated, the air pressure in the electrolytic cell 1 increases and squeezes the piston 27 upward, and the upward piston 27 drives the limit plate 29 to rise through the round rod 28, and the rising limit plate 29 compresses the first spring 30 until the piston 27 moves to above the connection port between the outlet pipe 48 and the upper pipe 25, and then the oxygen generated in the electrolytic cell 1 is discharged through the outlet pipe 48; S3, when the copper ions in the copper nitrate in the electrolytic cell 1 are consumed, the oxygen production decreases, and then the air pressure in the electrolytic cell 1 decreases, the compressed first spring 30 rebounds and drives the limit plate 29 to descend, and the descending limit plate 29 drives the piston 27 to descend through the round rod 28, and when the first spring 30 recovers, the limit plate 29 squeezes the pressure sensor embedded in the upper surface of the baffle 26, and the pressure sensor is under pressure, indicating that the electrolytic reaction in the electrolytic cell 1 will stop, and sends a signal to the controller, and the controller controls the motor 16 to run; S4, the running motor 16 drives the one-way screw 17 to rotate, and the rotating one-way screw 17 drives another one-way screw 17 to rotate in the same direction through the synchronous wheel 20 and the synchronous belt 21, driving the two second threaded seats 18 to rise, and the two rising second threaded seats 18 drive the upper cover 22 to rise through the mounting frame 19, and the rising upper cover 22 drives the cathode copper foil 23 and the anode sheet 24 to rise; S5, the rising upper cover 22 will drive the metal plate 45 to rise through the L-shaped plate 44. Since the magnetic force of the magnet 42 is connected to the metal plate 45, the rising metal plate 45 will drive the magnet 42 to rise until the magnet 42 contacts the upper plate 40. Due to the limit of the upper plate 40, the metal plate 45 that continues to rise is separated from the magnet 42. Since the magnetic magnet 42 is magnetically connected to the upper plate 40, the rising magnet 42 pulls the slide plate 34 to move through the pull rope 43. The moving slide plate 34 compresses the second spring 37 and also drives the baffle 35 to move, so that the empty slot 32 is opened. After that, the used copper nitrate electrolyte in the electrolytic cell 1 is discharged through the empty slot 32 and the output pipe 36. S6. The rising upper cover 22 will also drive the first rack 12 to rise. The rising first rack 12 meshes with the first gear 10 and drives the first gear 10 to rotate. The rotating first gear 10 drives the bidirectional screw 3 to rotate through the overrunning clutch 9. The rotating bidirectional screw 3 drives the two first threaded seats 4 to move away from each other, and then drives the two triangular storage boxes 6 to move away from each other, so that the cathode copper foil 23 with copper grains deposited on the surface passes between the two triangular storage boxes 6. After the first rack 12 that continues to rise disengages from the first gear 10, the two triangular storage boxes 6 remain stationary until the cathode copper foil 23 moves above the triangular storage boxes 6. At this time, the second rack 13 meshes with the second gear 11. The rising second rack 13 drives the second gear 11 to reverse. The reversed second gear 11 drives the bidirectional screw 3 to reverse through the overrunning clutch 9, and then drives the two triangular storage boxes 6 to approach each other until the two triangular storage boxes 6 are in contact. S7, then the motor 16 drives the one-way screw 17 to reverse, and the two second threaded seats 18 are lowered through the ascending operation, thereby driving the upper cover 22 to descend, and the descending upper cover 22 will drive the second gear 11 to rotate through the second rack 13, and the rotating second gear 11 will not drive the bidirectional screw 3 to rotate due to the overrunning clutch 9, and then the descending upper cover 22 will drive the cathode copper foil 23 to pass through the opening 7 ports of the two triangular storage boxes 6, and the copper grains deposited on the surface of the cathode copper foil 23 passing through the ports of the opening 7 are scraped off and collected in the triangular storage box 6, and the descending first rack 12 will drive the first gear 10 to reverse after meshing with the first gear 10, and the bidirectional screw 3 will not be driven to reverse through the overrunning clutch 9, and when the upper cover 22 moves to the port of the electrolytic cell 1, the scraping is completed; S8. The metal plate 45 is driven downward by the descending upper cover 22. When the descending metal plate 45 contacts the magnet 42, the magnet 42 is pressed downward to separate it from the upper plate 40. Then the second spring 37 rebounds to drive the slide plate 34 to restore its position. The restored slide plate 34 will restore the baffle plate 35 to block the empty slot 32. Then the solenoid valve 47 is opened, and copper nitrate liquid is re-added into the electrolytic cell 1 through the input pipe 46. Then the above operation is repeated to continue electrolysis. Then the copper grains collected multiple times are taken out from the triangular storage box 6, and then they are cleaned and dried and flow into the next process.

Claims

1. A method for preparing a copper alloy gold-plated bonding wire, comprising an electrolysis mechanism, a moving mechanism, a copper removal mechanism, a gas outlet mechanism and a liquid outlet mechanism, wherein the moving mechanism is installed on the side of the electrolysis mechanism, the copper removal mechanism is arranged inside the electrolysis mechanism, the gas outlet mechanism is installed on the upper surface of the electrolysis mechanism, and the liquid outlet mechanism is installed on the lower surface of the electrolysis mechanism, the electrolysis mechanism is used for electrolysis, the moving mechanism is used for moving the upper cover, the gas outlet mechanism is used for gas outlet, and the liquid outlet mechanism is used for liquid discharge, characterized in that: The copper removal mechanism includes a moving component and a storage box installed thereon. When the moving mechanism drives the cathode copper foil to descend, the moving component drives the two triangular storage boxes to be combined, so that the descending cathode copper foil passes through the openings of the two triangular storage boxes, and the copper grains deposited on the surface of the cathode copper foil are scraped off by the opening port and collected in the triangular collection box.

2. The method for preparing the copper alloy gold-plated bonding wire according to claim 1, characterized in that: The electrolysis mechanism comprises an electrolytic cell (1), an upper port of the electrolytic cell (1) is provided with an upper cover (22), a cathode copper foil (23) is mounted on the lower surface of the upper cover (22), an anode sheet (24) is mounted on the lower surface of the upper cover (22) on one side of the cathode copper foil (23), an input tube (46) is mounted on the rear surface of the electrolytic cell (1) near the upper port, a solenoid valve (47) is mounted on the input tube (46) near the electrolytic cell (1), and a controller is mounted on the front surface of the electrolytic cell (1).

3. The method for preparing the copper alloy gold-plated bonding wire according to claim 2, characterized in that: The copper removal mechanism comprises two rectangular plates (2) mounted on the inner wall of the electrolytic cell (1), a bidirectional screw (3) being rotatably mounted between the two rectangular plates (2), each thread of the bidirectional screw (3) being provided with a first thread seat (4), a mounting rod (5) being mounted on the side of each first thread seat (4), a triangular storage box (6) being mounted on the end of each mounting rod (5) on one side of the cathode copper foil (23), an opening (7) being adapted to the cathode copper foil (23) being provided at the port of each triangular storage box (6), and each triangular storage box (6) being provided with a first screw seat (4) on the side of each first screw seat (4). The upper ports of the box (6) are both installed with a U-shaped plate (8), both ends of the bidirectional screw (3) pass through the rectangular plate (2) and are installed with overrunning clutches (9), one of the overrunning clutches (9) extends to the outside of the electrolytic cell (1) and is installed with a first gear (10), the other overrunning clutch (9) extends to the outside of the electrolytic cell (1) and is installed with a second gear (11), a first rack (12) matched with the first gear (10) is installed on the side of the upper cover (22), and a second rack (13) matched with the second gear (11) is installed on the other side of the upper cover (22).

4. The method for preparing the copper alloy gold-plated bonding wire according to claim 2, characterized in that: The moving mechanism comprises moving seats (14) mounted on both sides of the electrolytic cell (1), each of the moving seats (14) having a moving groove (15) on its side, a one-way screw (17) being rotatably mounted in each of the moving grooves (15), each of the one-way screws (17) being provided with a second threaded seat (18) matching the moving groove (15), a mounting frame (19) connected to an upper cover (22) being mounted on the side of each of the second threaded seats (18), the lower end of each of the one-way screws (17) extending to the outside of the moving seat (14) and being mounted with a synchronous wheel (20), a synchronous belt (21) being commonly mounted on the two synchronous wheels (20), a motor (16) being mounted on the upper end of one of the moving seats (14), the driving end of the motor (16) extending into the moving groove (15) and being fixedly connected to the upper end of the corresponding one-way screw (17).

5. The method for preparing the copper alloy gold-plated bonding wire according to claim 4, characterized in that: The air outlet mechanism comprises an upper tube (25) with an upper port being a closed port installed on the upper surface of the upper cover (22) near the edge, a baffle (26) being installed inside the upper tube (25), a piston (27) matching the baffle (26) being arranged inside the upper tube (25) below the baffle (26), a round rod (28) being installed at the center of the upper surface of the piston (27), the upper end of the round rod (28) extending to the upper surface of the baffle (26) and being installed with a limit plate (29), a first spring (30) being arranged inside the upper tube (25) above the limit plate (29), a pressure sensor being embedded in the upper surface of the baffle (26), and an air outlet pipe (48) being installed on the side surface of the upper tube (25) between the piston (27) and the baffle (26).

6. The method for preparing the copper alloy gold-plated bonding wire according to claim 5, characterized in that: The liquid discharge mechanism comprises a mounting seat (31) mounted on the lower surface of the electrolytic cell (1) directly below the upper tube (25); a slot (32) is provided inside the mounting seat (31); a cavity (33) is provided inside the mounting seat (31) on one side of the slot (32); a slide plate (34) is slidably arranged inside the cavity (33); a second spring (37) is arranged inside the cavity (33) on one side of the slide plate (34); a baffle (35) extending into the slot (32) and blocking the slot is installed at the center of the other side surface of the slide plate (34); a pipeline extending into the electrolytic cell (1) is installed on the inner top surface of the slot (32); and an output pipe (36) extending to the outside is installed at the center of the inner bottom surface of the slot (32).

7. The method for preparing the copper alloy gold-plated bonding wire according to claim 6, characterized in that: A bottom plate (39) is installed on the rear surface of the electrolytic cell (1), an upper plate (40) is installed on the rear surface of the electrolytic cell (1) just above the bottom plate (39), a slide bar (41) is installed between the bottom plate (39) and the upper plate (40), a magnet (42) is slidably arranged on the slide bar (41), a pulley (38) is installed on the rear surface of the electrolytic cell (1) just below the magnet (42), a pull rope (43) is installed at the center of the side of the slide plate (34), extending to the outside of the mounting seat (31), bypassing the pulley (38) and fixedly connected to the magnet (42), and an L-shaped plate (44) is installed on the rear surface of the upper cover (22) just above the magnet (42), and a metal plate (45) whose lower surface contacts the magnet (42) is installed at the lower end of the L-shaped plate (44).

8. The method for preparing the copper alloy gold-plated bonding wire according to claim 7, characterized in that: The specific steps include: S1, connecting the input pipe (46) to the output end of the copper nitrate delivery device, opening the solenoid valve (47), and allowing the copper nitrate solution to enter the electrolytic cell (1) through the input pipe (46) until the liquid level is at the same height as the bottom of the triangular storage box (6), then closing the solenoid valve (47), and the addition of copper nitrate is completed; S2, the cathode copper foil (23) and the anode sheet (24) are energized to form an electrolytic cell inside the electrolytic cell (1), and the copper ions in the copper nitrate solution are converted into copper by the electrons near the cathode copper foil (23), and high-purity copper grains are deposited on the surface of the cathode copper foil (23), and oxygen bubbles are formed near the anode. As the amount of oxygen increases, the air pressure in the electrolytic cell (1) increases and presses the piston (27) upward, and the upwardly moving piston (27) drives the limit plate (29) to rise through the round rod (28), and the rising limit plate (29) compresses the first spring (30) until the piston (27) moves to above the connection port between the outlet pipe (48) and the upper pipe (25), and then the oxygen generated in the electrolytic cell (1) is discharged through the outlet pipe (48); S3, when the copper ions in the copper nitrate in the electrolytic cell (1) are consumed, the oxygen production decreases, and then the air pressure in the electrolytic cell (1) decreases, the compressed first spring (30) rebounds and drives the limit plate (29) to descend, and the descending limit plate (29) drives the piston (27) to descend through the round rod (28), and when the first spring (30) is restored, the limit plate (29) squeezes the pressure sensor embedded in the upper surface of the baffle (26), and when the pressure sensor is subjected to pressure, it indicates that the electrolytic reaction in the electrolytic cell (1) is about to stop, and sends a signal to the controller, and the controller controls the motor (16) to operate; S4, the running motor (16) drives the one-way screw (17) to rotate, and the rotating one-way screw (17) drives another one-way screw (17) to rotate in the same direction through the synchronous wheel (20) and the synchronous belt (21), thereby driving the two second threaded seats (18) to rise, and the two rising second threaded seats (18) drive the upper cover (22) to rise through the mounting frame (19), and the rising upper cover (22) drives the cathode copper foil (23) and the anode sheet (24) to rise; S5. The rising upper cover (22) drives the metal plate (45) to rise via the L-shaped plate (44). Since the magnetic force of the magnet (42) is connected to the metal plate (45), the rising metal plate (45) drives the magnet (42) to rise until the magnet (42) contacts the upper plate (40). Due to the limit of the upper plate (40), the metal plate (45) that continues to rise is separated from the magnet (42). Since the magnetic magnet (42) is magnetically connected to the upper plate (40), the rising magnet (42) pulls the slide plate (34) to move via the pull rope (43). The moving slide plate (34) compresses the second spring (37) and drives the baffle (35) to move, so that the empty slot (32) is opened. After that, the used copper nitrate electrolyte in the electrolytic cell (1) is discharged through the empty slot (32) and the output pipe (36). S6. The rising upper cover (22) also drives the first rack (12) to rise. The rising first rack (12) meshes with the first gear (10) and drives the first gear (10) to rotate. The rotating first gear (10) drives the bidirectional screw (3) to rotate through the overrunning clutch (9). The rotating bidirectional screw (3) drives the two first threaded seats (4) to move away from each other, thereby driving the two triangular storage boxes (6) to move away from each other, allowing the cathode copper foil (23) with copper grains deposited on the surface to pass between the two triangular storage boxes (6), and After the first rack (12) continues to rise and disengages from the first gear (10), the two triangular storage boxes (6) remain stationary until the cathode copper foil (23) moves to the top of the triangular storage box (6). At this time, the second rack (13) meshes with the second gear (11), and the rising second rack (13) drives the second gear (11) to reverse. The reversed second gear (11) drives the bidirectional screw (3) to reverse through the overrunning clutch (9), thereby driving the two triangular storage boxes (6) to approach each other until the two triangular storage boxes (6) are in contact. S7, the motor (16) then drives the one-way screw (17) to reverse, and the two second threaded seats (18) are lowered through the ascending operation, thereby driving the upper cover (22) to descend, and the descending upper cover (22) drives the second gear (11) to rotate through the second rack (13), and the rotating second gear (11) will not drive the bidirectional screw (3) to rotate due to the overrunning clutch (9), and then the descending upper cover (22) will drive the cathode copper foil (23) to pass through the opening (7) ports of the two triangular storage boxes (6), and the copper crystals deposited on the surface of the cathode copper foil (23) passing through the ports of the opening (7) are scraped off and collected in the triangular storage box (6), and the descending first rack (12) will drive the first gear (10) to reverse after meshing with the first gear (10), and the bidirectional screw (3) will not be driven to reverse through the overrunning clutch (9), and when the upper cover (22) moves to the port of the electrolytic cell (1), the scraping is completed; S8. The metal plate (45) is driven downward by the descending upper cover (22). When the descending metal plate (45) contacts the magnet (42), the magnet (42) is pressed downward to separate it from the upper plate (40). Then, the second spring (37) rebounds and drives the slide plate (34) to restore its position. The restored slide plate (34) restores the baffle plate (35) to block the empty slot (32). Then, the solenoid valve (47) is opened, and copper nitrate liquid is added to the electrolytic cell (1) again through the input pipe (46). Then, the above operation is repeated to continue electrolysis. Then, the copper crystals collected multiple times are taken out from the triangular storage box (6), and then they are cleaned and dried and flow into the next process.

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