Brown oxidation line control system

Abstract

The invention discloses a brown oxidation line control system which ensures reliable and stable operation of a lead frame during brown oxidation line operation. The system comprises an upper computer, a main control cabinet and a plurality of sub-control cabinets, wherein the main control cabinet is in software communication with the upper computer through a Modbus TCP (Transmission Control Protocol); a plurality of control modules of the control system and an equipment overall power supply control module are arranged in the main control cabinet, and input signal acquisition and output signal control are arranged in each group of sub-control cabinets; the control system comprises a plurality of control modules and an upper computer, the upper computer and the control modules perform data interaction through a Modbus TCP communication protocol, and the control modules have communication and logic processing functions and are used for receiving and processing various received signals and sending equipment operation states to the upper computer; the upper computer is used for displaying and recording the temperature, the liquid level height, the rectifier state and the overall operation state of the equipment of all the liquid storage tanks, giving an alarm and setting corresponding parameters of the equipment.

Description

Technical Field

[0001] This invention relates to the technical field of copper processing, specifically to a brown oxide line control system. Background Technology

[0002] With the development of the semiconductor industry, the requirements for packaging reliability are becoming increasingly stringent, which in turn places higher reliability demands on the frame. Existing mature processes typically involve electroplating the frame followed by brown anodizing to meet the MSL1 requirements of packaged products. The industry is now developing a variety of solutions for customers, including single-sided brown anodizing, single-sided partial brown anodizing, and ERC+brown anodizing.

[0003] Brown oxidation involves a special pretreatment process that reacts the copper material with a browning solution to form a micro-etched copper surface. This roughens the copper surface (i.e., generates a dense organic browning film on the copper surface), thereby enhancing the adhesion between the copper material and the molding compound and improving packaging reliability.

[0004] However, existing technologies cannot reliably solve the problem of controlling the brown oxidation line, especially the reliable control of chemical soaking and pure water spraying, resulting in relatively low stability of the brown oxidation line. Therefore, it is necessary to develop a brown oxidation line control system to solve the systemic control problem of the brown oxidation process. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a brown oxidation line control system that ensures reliable and stable operation of the lead frame during brown oxidation line processing.

[0006] A brown oxidation line control system, characterized in that it comprises: a host computer, a main control cabinet, and several sub-control cabinets, wherein the main control cabinet communicates with the host computer software via Modbus TCP;

[0007] The main control cabinet contains several control modules of the control system and an overall power control module for the equipment. Each set of sub-control cabinets contains input signal acquisition and output signal control.

[0008] The control system includes several control modules and a host computer. The host computer and the control modules interact with each other via the Modbus TCP communication protocol. The control modules have communication and logic processing functions, and are used to receive and process various signals received, and send the equipment operating status to the host computer. The host computer is used to display and record the temperature, liquid level, rectifier status, overall equipment operating status, and alarms of all liquid storage tanks, and to set the corresponding parameters of the equipment.

[0009] The sub-control cabinets are set up next to each process and are used to collect the parameters of each piece of equipment arranged in the corresponding process and summarize them to the control module connected to each sub-control cabinet. The CPU in the main control cabinet controls the system through Modbus TCP communication.

[0010] Its further features are:

[0011] Several control modules include an electroplating control module, a chemical immersion control module, a pure water spray control module, a lead frame transmission control module, a blowing control module, a drying control module, and an alarm module;

[0012] The alarm module is used to monitor the operating parameters and information of the electroplating control module, chemical immersion control module, pure water spray control module, lead frame transmission control module, blowing control module, and drying control module, and to provide prompts and alarms in case of abnormalities.

[0013] The lead frame transmission control module includes a steel strip running system, which includes a steel strip, a frequency converter, and a motor. The frequency converter controls the motor to realize the running of the steel strip. There are steel strip clips on the steel strip. The lead frame is fixed to the steel strip by the steel strip clips. The lead frame moves with the steel strip to realize the overall process flow of electroplating-chemical immersion-spray cleaning-blowing-drying. The frequency converter and the lead frame transmission control module exchange data through the Modbus RTU communication protocol.

[0014] The electroplating control module controls the rectifier, counting sensor, and proximity sensor corresponding to the electroplating process. The counter and proximity sensor calculate the real-time length of the lead frame in the working tank of the electroplating process. Based on the proportion of the lead frame to the total length of the working tank, the module releases a corresponding current / voltage to complete the electroplating and protect the lead frame, preventing damage to the lead frame caused by over-plating.

[0015] The medicine soaking control module is used to control the liquid level of the medicine in the medicine soaking working tank;

[0016] The drug soaking control module controls the water pump, manual ball valve, nozzle, and liquid level float connected to the drug soaking working tank; after the water pump starts, the liquid level in the drug soaking working tank is adjusted through the manual ball valve to protect the equipment's working status.

[0017] The medicine soaking control module includes a temperature control module, which is used to control the working temperature of the medicine in the medicine soaking working tank.

[0018] The temperature control module includes an electromagnetic heater, a hot water circulation system, heating and cooling coils in the medicine storage tank, and a solenoid valve that controls the flow of hot and cooling water through the coils. The electromagnetic heater heats the tap water in the water tank. When the temperature in the medicine storage tank is high, the hot water solenoid valve is closed to stop the hot water from entering the storage tank heating pipe, and the cooling water solenoid valve is opened to cool the water. When the temperature in the medicine storage tank is low, the hot water solenoid valve is opened to allow hot water to enter the pump storage tank heating pipe, and the cooling water solenoid valve is closed to stop cooling and heating.

[0019] The hot water circulation system has the following characteristics: when the heating function is turned on, the circulation pump circulates the hot water in the hot water tank in the pipeline. When a medicine storage tank needs to be heated, the solenoid valve is opened to allow hot water to flow through the heating coil to heat the medicine in the storage tank.

[0020] When the liquid level and temperature of the chemical soaking tank are appropriate, the pure water spray pressure is appropriate, and there is no alarm, the steel belt starts to run. When the lead frame passes through the electroplating process, the voltage / current is released according to the length ratio of the frame to perform electroplating. After electroplating, chemical soaking, pure water spraying, blowing and drying processes, the automatic control of the brown oxidation process is completed.

[0021] The pure water spray control module is used to control the pure water spray pressure in the pure water spray working tank. The pure water spray control module includes control of the water pump, pressure gauge, manual ball valve, nozzle, and liquid level float connected to the pure water spray working tank. After the water pump starts, the spray pressure of the nozzle in the pure water spray working tank is adjusted by the manual ball valve, and the pressure gauge is adjusted to set high and low pressure limit alarms. This ensures that the lead frame is cleaned, while preventing excessive pressure from damaging the product and preventing insufficient pressure from causing incomplete cleaning.

[0022] The drying control module includes the control of the blower and the corresponding pipeline. The blower blows air to form an air knife to uniformly rinse the surface of the lead frame and blow away the liquid residue on the surface of the lead frame.

[0023] The drying control module includes the control of the blower and the heater. After the overall process is completed, the blower and the heater blow hot air to dry the surface of the lead frame, which facilitates the recycling of the lead frame.

[0024] The alarm module is used to alarm for abnormal working parameters and working status. The steel belt can only be run for brown oxidation after all important alarms in the process are cleared.

[0025] It provides a brown oxidation line control system to solve the systemic control problem of the brown oxidation process. Attached Figure Description

[0026] Figure 1 This is a schematic diagram showing the overall framework of the present invention;

[0027] Figure 2 This is a schematic diagram showing the arrangement of various modules within the main control cabinet of the present invention;

[0028] Figure 3 This is a simplified control diagram of the herbal soaking process in the present invention;

[0029] Figure 4 This is a simplified control diagram of the pure water spraying process in this invention;

[0030] Figure 5 This is a simplified diagram of the herbal soaking process temperature control in this invention.

[0031] The names corresponding to the serial numbers in the diagram are as follows:

[0032] 1-1 First water pump, 1-3 First inlet manual ball valve, 1-4 Chemical soaking tank, 1-5 First steel strip inlet, 1-6 First steel strip outlet, 1-7 First working tank level float, 1-8 First outlet manual ball valve, 1-9 First inlet pipe, 1-10 First outlet pipe, 1-11 First storage tank high level float, 1-12 First storage tank low level float, 1-13 First storage tank empty level float, 1-14 Chemical storage tank;

[0033] 2-1 Second water pump, 2-2 Second pressure gauge, 2-3 Second inlet manual ball valve, 2-4 Pure water spray working tank, 2-5 Second steel strip inlet, 2-6 Second steel strip outlet, 2-7 Working tank spray head, 2-8 Second inlet pipe, 2-9 Second outlet pipe, 2-10 Second storage tank high level float, 2-11 Second storage tank empty level float, 2-12 Water storage tank;

[0034] 3-1 Heating water tank, 3-2 Heating water tank empty level float, 3-3 Heating water tank low level float, 3-4 Hot water circulation return port, 3-5 Hot water circulation outlet, 3-6 Circulation pump, 3-7 Electromagnetic heater, 3-8 Heating solenoid valve, 3-9 Heating coil, 3-10 Cooling coil, 3-11 Cooling solenoid valve. Detailed Implementation

[0035] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0036] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this invention. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0037] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0038] The invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0039] A brown oxidation line control system, see Figure 1 and Figure 2 It includes: a host computer, a main control cabinet, and several sub-control cabinets. The main control cabinet communicates with the host computer software via Modbus TCP.

[0040] The main control cabinet contains several control modules of the control system and the overall power control module of the equipment. Each sub-control cabinet is equipped with input signal acquisition and output signal control. The sub-control cabinets transmit the corresponding signals to the corresponding independent control modules.

[0041] The control system includes several control modules and a host computer. The host computer and control modules interact with each other via the Modbus TCP communication protocol. The control modules have communication and logic processing functions, and are used to receive and process various signals received, and send the equipment operating status to the host computer. The host computer is used to display and record the temperature, liquid level, rectifier status, overall equipment operating status, alarms of all liquid storage tanks, and to set the corresponding parameters of the equipment.

[0042] The sub-control cabinets are set up next to each process step to collect parameters of the various equipment arranged in the corresponding process step and summarize them to the control module connected to each sub-control cabinet. The CPU in the main control cabinet controls the system through Modbus TCP communication.

[0043] The process of brown oxidation line includes electroplating, chemical soaking, pure water spraying, blowing, drying, and a ring steel belt that runs through all processes. The power end of the steel belt corresponds to the lead frame transmission control module.

[0044] Several control modules include an electroplating control module, a chemical immersion control module, a pure water spray control module, a lead frame transmission control module, a blowing control module, a drying control module, and an alarm module. In specific implementation, for the purpose of integrated control, adjacent chemical immersion control modules and pure water spray control modules are combined into a chemical immersion and pure water spray control module, and adjacent blowing control modules and drying control modules are integrated into a blowing and drying control module.

[0045] In practice, the alarm module is used to monitor the operating parameters and information of the electroplating control module, chemical immersion control module, pure water spray control module, lead frame transmission control module, blowing control module, and drying control module, and to provide prompts and alarms in case of abnormalities.

[0046] The lead frame transmission control module includes a steel strip running system, which consists of a steel strip, a frequency converter, and a motor. The frequency converter controls the motor to run the steel strip. There are steel strip clips on the steel strip, and the lead frame is fixed to the steel strip by the steel strip clips. The lead frame moves with the steel strip to realize the overall process of electroplating, chemical immersion, spray cleaning, blowing and drying. The frequency converter and the lead frame transmission control module exchange data through the Modbus RTU communication protocol.

[0047] The electroplating control module controls the rectifier, counting sensor, and proximity sensor corresponding to the electroplating process. The counter and proximity sensor calculate the real-time length of the lead frame in the working tank of the electroplating process. Based on the proportion of the lead frame to the total length of the working tank, the module releases a corresponding current / voltage to complete the electroplating and protect the lead frame, preventing damage to the lead frame caused by over-plating.

[0048] The medicine soaking control module is used to control the liquid level of the medicine in the medicine soaking tank;

[0049] The chemical soaking control module controls the water pump, manual ball valve, nozzle, and level float connected to the chemical soaking tank. After the water pump starts, the level in the chemical soaking tank is adjusted via the manual ball valve, and the pressure gauge is adjusted to trigger high and low pressure limit alarms to protect the equipment. For specific implementation details, see [link to implementation details]. Figure 3The liquid in the medicine storage tank 1-14 is medicine solution. The first water pump 1-1 is started. The first inlet manual ball valve 1-3 and the first outlet manual ball valve 1-8 adjust and control the liquid level in the medicine soaking working tank 1-4 so that the liquid level float 1-7 just floats. By adjusting the first inlet manual ball valve 1-3, the first working tank liquid level float 1-7, and the first outlet manual ball valve 1-8, the system can be made to achieve a balance. The liquid level float provides feedback to the system, and the operating status of the medicine soaking process can be monitored in real time.

[0050] The chemical soaking control module detects the liquid level float and water pump equipment in the chemical soaking process. The control system in the module can detect whether the water pump is overloaded, the amount of chemical stored in the chemical storage tank, and whether the chemical level in the working tank meets the standard. The host computer system monitors the equipment status in real time and realizes the control of the equipment.

[0051] The medicine soaking control module includes a temperature control module, which is used to control the working temperature of the medicine in the medicine soaking tank.

[0052] The temperature control module includes an electromagnetic heater, a hot water circulation system, heating and cooling coils in the medicine storage tank, and solenoid valves that control the flow of hot and cooling water through the coils. The electromagnetic heater heats the tap water in the water tank. When the temperature in the medicine storage tank is high, the hot water solenoid valve is closed to stop the hot water from entering the storage tank heating pipes, and the cooling water solenoid valve is opened to cool the water. When the temperature in the medicine storage tank is low, the hot water solenoid valve is opened to allow hot water to enter the pump storage tank heating pipes, and the cooling water solenoid valve is closed to stop cooling and heating.

[0053] The hot water circulation system has the following characteristics: When the heating function is turned on, the circulation pump circulates the hot water in the hot water tank through the pipes. When a medicine storage tank needs to be heated, the solenoid valve is opened to allow hot water to flow through the heating coil to heat the medicine in the storage tank.

[0054] For specific implementation, see Figure 5 When the pure water reaches the height of the low-level float ball 3-3 in the heating water tank, the level alarm is cleared, and the electromagnetic heater 3-7 and the circulating pump 3-6 start simultaneously to heat the tap water in the water tank. When the temperature in the medicine storage tank 1-14 is high, the heating solenoid valve 3-8 is controlled to stop hot water from entering the medicine storage tank 1-14, and the cooling water solenoid valve 3-12 is opened to allow external cooling water to enter the cooling coil 3-13 in the medicine storage tank 1-14 to cool the medicine. When the temperature in the medicine storage tank 1-14 is low, the heating solenoid valve 3-8 is controlled to open to allow hot water to enter the heating coil 3-9 in the medicine storage tank 1-14 to circulate, and the cooling water solenoid valve 3-11 is stopped, causing the temperature of the medicine in the medicine storage tank 1-14 to rise.

[0055] The temperature control structure enables real-time control of the temperature of the chemical solution process in the brown oxidation line. The host computer component sets and monitors the temperature in each chemical solution tank in real time to achieve the goal of temperature control.

[0056] When the liquid level and temperature of the chemical soaking tank are appropriate, the pure water spray pressure is appropriate, and there is no alarm, the steel belt starts to run. When the lead frame passes through the electroplating process, the voltage / current is released according to the length ratio of the frame to carry out electroplating. After electroplating, chemical soaking, pure water spraying, blowing and drying, the automatic control of the brown oxidation process is completed.

[0057] The pure water spray control module is used to control the pure water spray pressure in the pure water spray working tank. The pure water spray control module includes the control of the water pump, pressure gauge, manual ball valve, nozzle, and liquid level float connected to the pure water spray working tank. After the water pump starts, the spray pressure of the nozzle in the pure water spray working tank is adjusted by the manual ball valve, and the pressure gauge is adjusted to set high and low pressure limit alarms to protect the equipment's working status.

[0058] See Figure 4 This invention provides a pure water spray control module; the liquid in the water storage tank 2-12 is pure water, the second water pump 2-1 is started, and the second inlet manual ball valve 2-3 adjusts the spray pressure. By adjusting the second inlet manual ball valve 2-3, the system can be balanced. The liquid level float and pressure gauge provide feedback to the system, and the operation status of the spray process can be monitored in real time.

[0059] The pure water spray control module detects the level float, pressure gauge, and water pump equipment in the pure water spray process. The control system in the module can detect whether the water pump is overloaded, the amount of pure water stored in the pure water storage tank, and whether the pure water pressure in the working tank meets the standard. The host computer system monitors the equipment status in real time and realizes the control of the equipment.

[0060] The drying control module includes the control of the blower and the corresponding pipeline. The blower blows air to form an air knife to evenly rinse the surface of the lead frame and blow away the liquid residue on the surface of the lead frame.

[0061] The drying control module includes the control of the blower and the heater. After the overall process is completed, the blower and the heater blow hot air to dry the surface of the lead frame, making it easier to recycle the lead frame.

[0062] The alarm module is used to issue alarms for abnormal working parameters and working status. The steel strip can only be run for brown oxidation after all important alarms in each process have been cleared.

[0063] The frequency converter and the lead frame transmission control module exchange data via the Modbus RTU communication protocol. The steel strip clamp is responsible for holding the lead frame through each process to complete the brown oxidation. When there are no alarms during the chemical soaking and pure water spraying processes and the temperature is suitable, the steel strip starts running. When the lead frame passes through the electroplating process, the voltage / current is released according to the length ratio of the frame for electroplating. After chemical soaking, pure water spraying, blowing and drying processes, the brown oxidation process is completed with automated control. It provides a brown oxidation line control system that meets the automated control of each process of brown oxidation.

[0064] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0065] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A brown oxidation line control system, characterized in that: It includes: a host computer, a main control cabinet, and several sub-control cabinets, wherein the main control cabinet communicates with the host computer software via Modbus TCP; The main control cabinet is equipped with several control modules of the control system and the overall power supply control module of the equipment, and each group of sub-control cabinets is equipped with input signal acquisition and output signal control; The control system includes several control modules and a host computer. The host computer and the control module interact with each other through the Modbus TCP communication protocol. The control module has communication and logic processing functions, and is used to receive and process various signals received, and send the equipment operation status to the host computer; the host computer is used to display and record the temperature, liquid level, rectifier status, overall equipment operation status, alarm of all liquid storage tanks, and set the corresponding parameters of the equipment; The sub-control cabinets are arranged beside each process, and are used to collect parameters of each device arranged in the corresponding process, summarize them on the control module connected to each sub-control cabinet, and are uniformly controlled by the CPU in the main control cabinet through the Modbus TCP communication.

2. A brown oxidation line control system according to claim 1, characterized in that: The control modules include an electroplating control module, a chemical solution immersion control module, a pure water spraying control module, a lead frame transmission control module, a drying control module, a drying control module, and an alarm module.

3. A brown oxidation line control system according to claim 2, characterized in that: The alarm module is used to monitor the operating parameters and information of the electroplating control module, the chemical solution immersion control module, the pure water spraying control module, the lead frame transmission control module, the blow drying control module, and the drying control module, and to provide prompts and alarms in the event of abnormalities.

4. A brown oxidation line control system according to claim 2, characterized in that: The lead frame transmission control module includes a steel belt operation system, which includes a steel belt, a frequency converter, and a motor. The frequency converter controls the motor to realize the operation of the steel belt. There is a steel belt clip on the steel belt, and the lead frame is fixed to the steel belt by the steel belt clip. The lead frame realizes the overall process of electroplating-chemical solution immersion-spray cleaning-blow drying-drying as the steel belt runs. The frequency converter and the lead frame transmission control module exchange data through the Modbus RTU communication protocol.

5. A brown oxidation line control system according to claim 2, characterized in that: The electroplating control module controls the rectifier, counting sensor, and proximity sensor corresponding to the electroplating process. The counter and proximity sensor calculate the real-time lead frame length in the working tank of the electroplating process, and release the corresponding current / voltage according to the proportion of the lead frame to the total length of the working tank, so as to complete the electroplating and protect the lead frame, and prevent damage to the lead frame caused by excessive electroplating.

6. A brown oxidation line control system according to claim 2, characterized in that: The medicine solution immersion control module is used to control the liquid level of the medicine solution in the medicine solution immersion working tank; The medicine immersion control module controls the water pump, manual ball valve, nozzle, and liquid level float connected to the medicine immersion working tank; after the water pump is started, the liquid level in the medicine immersion working tank is adjusted through the manual ball valve to protect the working state of the equipment.

7. A brown oxidation line control system according to claim 6, characterized in that: The medicine solution immersion control module includes a temperature control module, and the temperature control module is used to control the working temperature of the medicine in the medicine solution immersion working tank.

8. A brown oxidation line control system according to claim 2, characterized in that: When the liquid level and temperature of the liquid immersion working tank are appropriate, the pure water spraying pressure is appropriate, and there is no alarm, the steel strip starts to run in the control system of the brown oxidation line. When the lead frame passes through the electroplating process, the voltage / current is released according to the length ratio of the frame for electroplating. After the electroplating, liquid immersion, pure water spraying, blowing and drying processes, the automatic control of the brown oxidation process is completed.

9. A brown oxidation line control system according to claim 2, characterized in that: The pure water spray control module is used to control the pure water spray pressure in the pure water spray working tank. The pure water spray control module includes controls for a water pump, a pressure gauge, a manual ball valve, a nozzle, and a liquid level float connected to the pure water spray working tank. After the water pump is started, the nozzle spray pressure in the pure water spray working tank is adjusted by the manual ball valve, and the pressure gauge is adjusted to perform high and low pressure limit alarms, thereby ensuring that the lead frame is cleaned while preventing damage to the product caused by excessive pressure and preventing unclean cleaning caused by insufficient pressure.

10. A brown oxidation line control system according to claim 2, characterized in that: The drying control module includes control for the blower and the corresponding pipeline, the blower blows air to form a wind knife to evenly wash the surface of the lead frame, and blow away the liquid residue on the surface of the lead frame; The drying control module includes control for a blower and a heater. After the entire process is completed, the blower cooperates with the heater to blow hot air to dry the surface of the lead frame, thereby facilitating the recovery of the lead frame.

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