Lead frame cleaning device

Abstract

The utility model discloses a lead frame cleaning device which comprises a cleaning tank, a cleaning table is transversely arranged in the cleaning tank, a gap is formed between the cleaning table and the inner wall of the cleaning tank, the cleaning table is of a box body structure, a cavity is formed in the cleaning table, a plurality of air holes are formed in the upper surface of the cleaning table, and the air holes are communicated with the cavity. The air holes are communicated with the cavity, one end of a nitrogen spraying pipe is communicated with the cavity, and a heating pipe is further installed in the cleaning tank. According to the lead frame cleaning device, high-temperature cleaning and water-gas two-fluid cleaning formed after nitrogen is sprayed are combined, grease and dirt on the surface of a lead frame can be rapidly cleaned, the production period is shortened, the cleaning process is simpler, more convenient and more efficient, the overall cleaning effect and efficiency of the lead frame are improved, and meanwhile the production cost is reduced. And the cleaning cost and the equipment precision requirement are low, the cleaning has the characteristics of no secondary pollution, no corrosion, no chemical toxicity and the like, and the performance of the bonding area of the lead frame cannot be influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of cleaning equipment, in particular to a lead frame cleaning device. Background Art

[0002] As one of the main structures of integrated circuit packaging, a lead frame is used to connect the contact points of the internal chip of the integrated circuit and external wires, and is a thin metal frame made of copper-plated alloy or aluminum / zinc alloy. With the important position of integrated circuits in the electronic information industry, the market demand for lead frames has been increasing continuously. During the use of lead frames, they will be affected by various physical, chemical and mechanical stresses. Especially after long-term use, various dirt or corrosion products will adhere to the metal surface. Under certain conditions, these dirt and corrosion products will cause electrochemical reactions on the metal surface, generating new dirt, which will affect the function and service life of the lead frame. To avoid the above effects, improve product quality and meet customer needs, the surface of the lead frame needs to be treated. Currently, the common surface treatment methods for lead frames on the market mainly include ultrasonic cleaning, physical vapor deposition (PVD), chemical vapor deposition (CVD) and electroplating. These methods generally have the disadvantages of high cost, low efficiency, damage to the aluminum layer and damage to the wire bonding area, and limited application range. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a lead frame cleaning device.

[0004] The technical solution for realizing the purpose of the utility model is: a lead frame cleaning device, including a cleaning tank, an inlet and a drain are provided on the cleaning tank, the drain is located at the bottom of the cleaning tank, a cleaning table is horizontally arranged in the cleaning tank, a gap is provided between the cleaning table and the inner wall of the cleaning tank, the cleaning table is of a box structure, a chamber is provided inside the cleaning table, a plurality of air holes are opened on the upper surface of the cleaning table, the air holes are communicated with the chamber, one end of a nitrogen spray pipe is communicated with the chamber, and a heating pipe is further installed in the cleaning tank.

[0005] Further, the air holes are evenly distributed on the cleaning table. The upper surface of the cleaning table is of a mesh hole structure.

[0006] Further, the cleaning table is installed on the inner wall of the cleaning tank. The cleaning table is directly installed on the inner wall of the cleaning tank, which can simplify the installation structure.

[0007] Further, the cleaning tank includes an upper tank and a lower tank which are vertically distributed. The width of the upper tank is greater than that of the lower tank. A transition shoulder is formed between the upper tank and the lower tank, and the cleaning table is mounted on the transition shoulder. After the cleaning table is mounted on the transition shoulder, on the one hand, no additional fixing parts are required, and the installation is convenient; on the other hand, detachable installation can be achieved. Especially when placing the lead frame on the cleaning table or taking it out from the cleaning table, the cleaning table can be directly removed from the cleaning tank, and the lead frame to be cleaned can be placed on the cleaning table outside, or the already cleaned lead frame on the cleaning table can be emptied outside, which is convenient for operation and improves the operation efficiency.

[0008] Further, the cleaning table is horizontally arranged. The horizontally arranged cleaning table is conducive to the placement of the lead frame and is not easy to fall out.

[0009] Further, the cleaning table is located at the middle position of the cleaning tank. Placing the cleaning table at the middle position of the cleaning tank is convenient for operation and can save water.

[0010] Further, the heating tube is located below the cleaning table. The heating tube needs to be placed in the cleaning water. After the heating tube is placed below the cleaning table, it will surely be in the cleaning water, and the equipment has high reliability. Moreover, there is a large space below the cleaning table, which is convenient for the installation of the heating tube.

[0011] Further, the heating tube is installed on the inner wall of the cleaning tank. This setting can simplify the installation structure.

[0012] Further, a temperature sensor is provided in the cleaning tank, and a temperature controller is provided on the outer wall of the cleaning tank. Both the temperature sensor and the heating tube are connected to the temperature controller. The temperature sensor senses the water temperature of the cleaning water in the cleaning tank in real time, and the temperature controller controls the heating tube according to the water temperature sensed by the temperature sensor in real time. This setting can realize the automatic control of the water temperature of the cleaning water in the cleaning tank, which is convenient for operation and can also improve the control accuracy.

[0013] Further, the water inlet is located above the cleaning table and near the top of the cleaning tank. This setting is convenient for water inlet.

[0014] Further, the top of the cleaning tank is provided with an open mouth. The open structure is convenient for putting the lead frame in and taking it out.

[0015] The lead frame cleaning device of the present utility model horizontally arranges the cleaning table in the cleaning tank. The cleaning table serves as a support member to place the lead frame to be cleaned. At the same time, the cleaning table is a box structure with air holes on its upper surface. After connecting the chamber to the nitrogen spray pipe, high-speed nitrogen can be sprayed into the chamber through the nitrogen spray pipe. The high-speed nitrogen sprayed into the chamber sprays upward from the air holes, enabling the ionic cleaning water to generate water mist. At the same time, under the surface tension of water, a large number of bubbles are generated by the cleaning agent in the ionic cleaning water. After the water mist and bubbles are formed, when their kinetic energy is at its maximum, they can be sprayed onto the lead frame on the cleaning table immediately and evenly for cleaning the lead frame.

[0016] The lead frame cleaning device of the present utility model, the cleaning table that serves both as a support member and a jet structure, makes the entire cleaning structure simpler. At the same time, it is convenient to spray high-speed nitrogen into the ionic cleaning water, so that the high-speed nitrogen accelerates the flow of the ionic cleaning water and generates water mist and bubbles. These water mist and bubbles can not only clean the lead frame on the cleaning table immediately, but also, during the cleaning process, in addition to removing the impurities on the surface of the lead frame, penetrate into the tiny gaps of the lead frame, dissolve and wash away the accumulated dirt on the lead frame, achieving deep cleaning. The lead frame cleaning device of the present utility model has a simple structure and a good cleaning effect of cleaning immediately and deeply.

[0017] The lead frame cleaning device of the present utility model, in addition to the cleaning table and the nitrogen spray pipe, also installs a heating pipe in the cleaning tank. The heating pipe heats the plasma cleaning water to achieve high-temperature cleaning of the lead frame. The combination of high-temperature cleaning and the water-vapor two-fluid cleaning formed after spraying nitrogen can greatly improve the cleaning effect.

[0018] The present utility model provides a lead frame cleaning device that combines high-temperature cleaning and the water-vapor two-fluid cleaning formed after spraying nitrogen. It can quickly clean the grease and dirt on the surface of the lead frame. In the case of relatively high requirements for lead frame cleaning, it shortens the production cycle, the cleaning process is more simple and efficient. While improving the overall cleaning effect and efficiency of the lead frame, not only the cleaning cost and the equipment accuracy requirements are relatively low, but also the cleaning has the characteristics of no secondary pollution, no corrosion, and no chemical toxicity, etc., and will not affect the performance of the bonding area of the lead frame. Description of the Drawings

[0019] Figure 1 is a perspective structural schematic diagram of the lead frame cleaning device of the present utility model;

[0020] Figure 2 is a cross-sectional structural schematic diagram of the lead frame cleaning device of the present utility model;

[0021] Figure 3 This is the control structure diagram of the heating tube of the lead frame cleaning device of the present utility model. Detailed implementation mode

[0022] The following will describe in detail the preferred embodiments of the lead frame cleaning device of the present utility model with reference to the accompanying drawings.

[0023] As Figures 1 to 3 shown, a lead frame cleaning device includes a cleaning tank 1, an inlet 11 and a drain 12 are provided on the cleaning tank 1, the drain 12 is located at the bottom of the cleaning tank 1, a cleaning table 2 is horizontally arranged in the cleaning tank 1, there is a gap between the cleaning table 2 and the inner wall of the cleaning tank 1, the cleaning table 2 is of a box structure, there is a chamber 21 inside the cleaning table 2, a plurality of air holes 22 are opened on the upper surface of the cleaning table 2, the air holes 22 communicate with the chamber 21, one end of a nitrogen spray pipe 3 is communicated with the chamber 21, and a heating tube 4 is also installed in the cleaning tank 1.

[0024] When the lead frame cleaning device of the present utility model works, open the water supply valve, put plasma cleaning water into the cleaning tank 1 through the inlet 11, the put ion cleaning water can flow into the lower part of the cleaning table 2 through the gap between the cleaning table 2 and the inner wall of the cleaning tank 1, and as the ion cleaning water is continuously put, the liquid level of the ion cleaning water gradually rises. When the liquid level height of the put plasma cleaning water is higher than the cleaning table 2 and submerges the heating tube 4, and it is ensured that the lead frame placed on the cleaning table 2 can be submerged, then close the water supply valve; add a cleaning agent to the plasma cleaning water in the cleaning tank 1; then heat the plasma cleaning water in the cleaning tank 1 to an appropriate cleaning temperature through the heating tube 4; then place the lead frame to be cleaned on the cleaning table 2; then pass high-speed nitrogen into the chamber 21 through the nitrogen spray pipe 3, the high-speed nitrogen passed into the chamber 21 sprays upward from the air holes 22, the high-speed nitrogen sprayed upward from the air holes 22 generates water mist in the plasma cleaning water and also makes a large number of bubbles in the cleaning agent, and the water mist and bubbles are evenly sprayed on the lead frame to clean the lead frame. After the cleaning is completed, drain the plasma cleaning water in the cleaning tank 1 through the drain 12, and take out the lead frame cleaned on the cleaning table 2.

[0025] The lead frame cleaning device of the present utility model horizontally arranges the cleaning table 2 in the cleaning tank 1. The cleaning table 2 serves as a support member to place the lead frame to be cleaned. At the same time, the cleaning table 2 is a box structure with air holes 22 opened on its upper surface. After connecting the chamber 21 to the nitrogen spray pipe 3, high-speed nitrogen can be sprayed into the chamber 21 through the nitrogen spray pipe 3. The high-speed nitrogen sprayed into the chamber 21 sprays upward from the air holes 22, enabling the ionic cleaning water to generate water mist. At the same time, under the surface tension of water, a large number of bubbles are generated by the cleaning agent in the ionic cleaning water. After the water mist and bubbles are formed, at the moment when their kinetic energy is the greatest, they can be sprayed onto the lead frame on the cleaning table 2 immediately and evenly to clean the lead frame.

[0026] The cleaning table 2 of the lead frame cleaning device of the present utility model, which serves both as a support member and a jet structure, makes the entire cleaning structure simpler. At the same time, it is convenient to spray high-speed nitrogen into the ionic cleaning water, so that the high-speed nitrogen can accelerate the flow of the ionic cleaning water and generate water mist and bubbles. These water mist and bubbles can not only clean the lead frame on the cleaning table 2 immediately, but also, during the cleaning process, in addition to removing the impurities on the surface of the lead frame, penetrate into the tiny gaps of the lead frame to dissolve and wash away the accumulated dirt on the lead frame, achieving deep cleaning. The lead frame cleaning device of the present utility model has a simple structure and a good cleaning effect of cleaning immediately and deeply.

[0027] The lead frame cleaning device of the present utility model, in addition to the cleaning table 2 and the nitrogen spray pipe 3, also installs the heating pipe 4 in the cleaning tank 1 to heat the plasma cleaning water to achieve high-temperature cleaning of the lead frame. The combination of high-temperature cleaning and the water-gas two-fluid cleaning formed after spraying nitrogen can greatly improve the cleaning effect.

[0028] The present utility model provides a lead frame cleaning device that combines high-temperature cleaning and the water-gas two-fluid cleaning formed after spraying nitrogen. It can quickly clean the grease and dirt on the surface of the lead frame. In the case of relatively high requirements for lead frame cleaning, it shortens the production cycle, the cleaning process is more simple and efficient. While improving the overall cleaning effect and efficiency of the lead frame, not only the cleaning cost and the equipment accuracy requirements are relatively low, but also the cleaning has the characteristics of no secondary pollution, no corrosion, and no chemical toxicity, and will not affect the performance of the bonding area of the lead frame.

[0029] Preferably, the air holes 22 are evenly distributed on the cleaning table 2. The upper surface of the cleaning table 2 is a mesh structure.

[0030] The lead frame cleaning device of the present utility model. Preferably, the cleaning table 2 is installed on the inner wall of the cleaning tank 1. The cleaning table 2 is directly installed on the inner wall of the cleaning tank 1, which can simplify the installation structure.

[0031] The lead frame cleaning device of the present utility model. Preferably, the cleaning tank 1 includes an upper tank 101 and a lower tank 102 which are distributed up and down. The width D1 of the upper tank 101 is greater than the width D2 of the lower tank 102. A transition shoulder 103 is formed between the upper tank 101 and the lower tank 102. The cleaning table 2 is mounted on the transition shoulder 103. After the cleaning table 2 is mounted on the transition shoulder 103, on the one hand, no additional fixing parts are required and the installation is convenient; on the other hand, detachable installation can be achieved. Especially when placing the lead frame on the cleaning table 2 or taking it out from the cleaning table 2, the cleaning table 2 can be directly removed from the cleaning tank 1. Place the lead frame to be cleaned on the cleaning table 2 outside, or pour out the lead frame that has been cleaned on the cleaning table 2 outside, which is convenient for operation and improves the operation efficiency.

[0032] The lead frame cleaning device of the present utility model. Preferably, the cleaning table 2 is horizontally arranged. The horizontally arranged cleaning table 2 is conducive to the placement of the lead frame and is not easy to fall out.

[0033] The lead frame cleaning device of the present utility model. Preferably, the cleaning table 2 is located at the middle position of the cleaning tank 1. The cleaning table 2 is placed at the middle position of the cleaning tank 1, which is convenient for operation and can save water.

[0034] The lead frame cleaning device of the present utility model. Preferably, the heating tube 4 is located below the cleaning table 2. The heating tube 4 needs to be placed in the cleaning water. After the heating tube 4 is placed below the cleaning table 2, it will surely be in the cleaning water, and the equipment has high reliability. Moreover, there is a large space below the cleaning table 2, which is convenient for the installation of the heating tube 4.

[0035] The lead frame cleaning device of the present utility model. Preferably, the heating tube 4 is installed on the inner wall of the cleaning tank 1. This setting can simplify the installation structure.

[0036] The lead frame cleaning device of the present utility model. Preferably, a temperature sensor 5 is provided in the cleaning tank 1, and a temperature controller 6 is provided on the outer wall of the cleaning tank 1. The temperature sensor 5 and the heating tube 4 are both connected to the temperature controller 6. The temperature sensor 5 senses the water temperature of the cleaning water in the cleaning tank 1 in real time, and the temperature controller 6 controls the heating tube 4 according to the water temperature sensed by the temperature sensor 5 in real time. This setting can realize the automatic control of the water temperature of the cleaning water in the cleaning tank 1, which is convenient for operation and can also improve the control accuracy.

[0037] The lead frame cleaning device of the present utility model. Preferably, the water inlet 11 is located above the cleaning table 2 and near the top of the cleaning tank 1. This setting facilitates water inlet.

[0038] The lead frame cleaning device of the present utility model. Preferably, the top of the cleaning tank 1 is provided with an open mouth. The open mouth structure facilitates the putting in and taking out of the lead frame.

[0039] The above are only the embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent process transformation made by using the content of the specification of the present utility model, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present utility model.

Claims

1. A lead frame cleaning device, characterized in that: The invention comprises a cleaning tank, wherein the cleaning tank is provided with a water inlet and a drain outlet, wherein the drain outlet is located at the bottom of the cleaning tank, wherein a cleaning table is horizontally arranged in the cleaning tank, wherein a gap is provided between the cleaning table and the inner wall of the cleaning tank, wherein the cleaning table is a box structure, wherein a chamber is provided in the cleaning table, wherein a plurality of air holes are provided on the upper surface of the cleaning table, wherein the air holes are connected with the chamber, wherein one end of a nitrogen spray pipe is connected with the chamber, and wherein a heating tube is also installed in the cleaning tank.

2. The lead frame cleaning device according to claim 1, characterized in that: The air holes are evenly distributed on the cleaning table.

3. The lead frame cleaning device according to claim 1, characterized in that: The cleaning platform is installed on the inner wall of the cleaning tank.

4. The lead frame cleaning device according to claim 1, characterized in that: The cleaning tank comprises an upper tank and a lower tank which are distributed up and down. The width of the upper tank is greater than the width of the lower tank. A transition shoulder is formed between the upper tank and the lower tank. The cleaning platform is mounted on the transition shoulder.

5. The lead frame cleaning device according to claim 1, characterized in that: The cleaning table is arranged horizontally; the cleaning table is located in the middle of the cleaning tank.

6. The lead frame cleaning device according to claim 1, characterized in that: The heating pipe is located below the cleaning station.

7. The lead frame cleaning device according to claim 1, characterized in that: The heating tube is installed on the inner wall of the cleaning tank.

8. The lead frame cleaning device according to claim 1, characterized in that: A temperature sensor is arranged in the cleaning tank, a temperature controller is arranged on the outer wall of the cleaning tank, and the temperature sensor and the heating tube are both distributed and connected to the temperature controller.

9. The lead frame cleaning device according to claim 1, characterized in that: The water inlet is located above the cleaning table and close to the top of the cleaning tank.

10. The lead frame cleaning device according to claim 1, characterized in that: The top of the cleaning tank is open.

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