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Analysis of the discoloration of the semiconductor copper support in the vacuum plasma treatment system

Analysis of the discoloration of the semiconductor copper support in the vacuum plasma treatment system

Analysis of the discoloration of the semiconductor copper bracket in the vacuum plasma treatment system:         The semiconductor packaging industry, including the packaging of integrated circuits, discrete devices, sensors and optoelectronic devices, usually uses copper lead frames. In order to improve the reliability of welding and encapsulation, copper brackets are generally processed by a vacuum plasma processing system to remove the surface The organic substances and contaminants of this kind increase the solderability and adhesion of the surface. Vacuum plasma processing system         Sometimes we will find that the copper bracket is not handled properly in the vacuum environment of the vacuum plasma processing system, and the surface is prone to discoloration and blackening, and in severe cases, burning and other phenomena may occur. Is this because the air in the air chamber is not sucked up enough? After the oxygen molecules in the remaining air are excited, they chemically react with the copper surface to form oxygen plasma. The result is copper oxide? Is the reason really that simple? Combining many years of practical experience in plasma cleaning of copper brackets, Chengfeng Intelligent Manufacturing engineers will analyze it with you.         1. The vacuum degree of the plasma affects the cleaning effect and color change of the copper bracket:         The vacuum factor of the plasma cleaner related to the vacuum degree includes the leakage rate of the vacuum chamber, the background vacuum, the speed of the vacuum pump, and the air inlet flow rate. The faster the vacuum pumping speed, the lower the background vacuum value, the less air is left, and the less chances of the copper stent reacting with the oxygen plasma; when the process gas enters, the formed plasma can fully react with the copper stent. The non-excited process gas can easily take away the reactants, and the copper support has a good cleaning effect and is not easy to fade.         2. The influence of the power of the vacuum plasma treatment system on the cleaning effect and discoloration of the copper bracket:         The related factors of vacuum plasma processing system power include energy power and unit power density. The greater the power, the higher the plasma energy, and the greater the bombardment force on the surface of the copper stent; when the power is the same, the fewer copper stents are processed, the greater the unit power density, the better the cleaning effect, but there is also excess energy. The risk of discoloration or burning of the board surface.         3. The influence of the electrode of the vacuum plasma treatment system on the discoloration of the copper bracket:         The plasma distribution of the vacuum plasma processing system is related to factors such as the electrode structure, the direction of the air flow, and the placement of the copper bracket. Due to different processing materials, process requirements and capacity requirements, the electrode structure design is also different; therefore, the gas field formed by the gas flow in the electrode affects the plasma movement, reaction, and uniformity; the placement of the copper bracket affects the electric field And the characteristics of the gas field, leading to unbalanced energy distribution, local plasma density is too high, burning sintering.         Experimental results show that the processing time, power frequency, and equipment type of the vacuum plasma processing system will affect the processing effect and color of the copper bracket.

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Plasma cleaning machine plasma cleaning connector aviation application

Plasma cleaning machine plasma cleaning connector aviation application

At present, many related products will use plasma cleaning machine for surface treatment. Aerospace connector is one of them. Chengfeng Zhizao has accumulated rich experience in this area.         High-precision fields such as aviation and aerospace generally have higher product requirements, and plasma cleaners are required to perform surface treatment on connectors and some metal parts. Next, take the connector as an example to introduce the related processing technology of plasma cleaning connector in aviation and other fields. Plasma cleaning connector         Generally, the connectors used in aviation and other fields are relatively small, mainly including fluorosilicone rubber FVMQ connectors, thermoplastic polyester PBT connectors, polyphenylene sulfide plastic PPS connectors, polyetheramide PEI connectors, etc., for bonding and printing The requirement of plasma cleaning machine is high. The original wiping and special glue bonding are replaced by plasma cleaning machine pretreatment, which can not only meet the environmental protection requirements, but also improve the reliability and consistency of the treatment.         Using a plasma cleaner to clean the connector base can remove silicone oil or release agent from the surface of the connector, improve the surface cleanliness of the product, and also improve the surface energy of the base, and improve the adhesion and reliability of the silk-screened characters. It can improve the printing and bonding effect of the connector. The change in the angle of the water droplets before and after the connector product base was processed by the plasma cleaner. The angle of the connector base was changed from 121 degrees to 50.8 degrees, and the aviation connector base was changed from 103.99 degrees to 53.6 degrees.         For the plasma surface treatment of aerospace products, there are two points worth noting:         1. The hydrophilic groups produced during the activation process of the plasma cleaner are easy to disappear with time. Therefore, after the plasma cleaner is processed, the subsequent treatment shall be carried out as soon as possible;         2. The process parameters used in plasma cleaning machine processing will be selected according to the different materials. In terms of parameter control, it is also an inspection of the equipment manufacturer's ability.         If you want to know more, please feel free to inquire at any time, and we will answer your questions about handling connector processing for free.

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What are the PTFE membranes activated by ptfe membrane plasma equipment? How is the process?

What are the PTFE membranes activated by ptfe membrane plasma equipment? How is the process?

       What are the PTFE membranes activated by ptfe membrane plasma equipment? How is the process? Three surface treatment methods to improve the adhesion of PTFE membranes have different characteristics and treatment effects. Today, we will focus on the activation treatment in the ptfe membrane plasma equipment. The activation treatment of ptfe membrane plasma equipment can improve the adhesion of the PTFE membrane material surface. Which membranes can be treated with plasma equipment? So what is the whole activation process? Let us understand together.        Due to different applications and different material compositions, PTFE membranes can be divided into many different types, and which PTFE membranes can be processed by plasma equipment, this can also be said to be quite a lot, not to list them one by one, the following is PTFE Several typical materials of the membrane have been processed. , 1. PTFE film with red pigment and glass fiber added; 2. PTFE film with graphite or carbon powder added; 3. The addition of ceramic powder PTFE film. ,     Since the above PTFE membrane is the addition or compounding of other materials, it is necessary to adjust the corresponding process parameters during the activation process of the specific ptfe membrane plasma equipment. Therefore, different PTFE membranes and different treatment purposes often correspond to different process parameters, and the plasma surface treatment process has a certain flow. Let's take a certain proportion of ceramic powder into the PTFE membrane as an example to introduce to you.           The purpose of plasma surface activation of ptfe membrane plasma equipment is to process the epoxy resin and PTFE membrane before pressing, and improve the adhesion with epoxy resin. Plasma surface activation process: Put the treated PTFE membrane into the vacuum chamber of the vacuum plasma surface treatment equipment, close the door and evacuate to 20-50Pa, and pass in a certain amount of process gas to maintain a certain degree of vacuum Perform plasma discharge, set the power and processing time, and then return the gas to break after the processing is completed, then open the door of the processed PTFEP tetrafluoroethylene membrane, and take out the processed PTFEP tetrafluoroethylene membrane.        In the detection of plasma activation effect, it can be reflected by changing the angle of the contact angle of water droplets. In addition, after 1000 hours of ultraviolet light aging test, the tensile value of the treated PTFE film reached 9N/cm or more, but the UV light aging test still did not peel off, the tensile value did not change much within the specified range, after the ptfe film plasma equipment plasma After surface activation, the bonding effect is qualified.

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The effect of plasma modification on the surface chemical structure of activated carbon fibers

The effect of plasma modification on the surface chemical structure of activated carbon fibers

The effect of plasma modification on the surface chemical structure of activated carbon fibers: Activated carbon fiber (ACF) is a new type of fibrous adsorbent formed by carbonized activated organic fibers. The adsorption and catalytic performance of activated carbon fiber is closely related to its surface area and surface chemical properties. For a long time, many studies have explored various modification methods to increase the specific surface area of ​​activated carbon fibers and enhance the activity of surface functional groups to achieve the purpose of improving the adsorption performance of activated carbon fibers. Plasma modification technology is a material surface modification technology that has developed rapidly in recent years. Plasma modification is to generate a large number of charged particles, excited particles, photons, free radicals and other plasmas in the dielectric barrier discharge. These high-energy plasmas are used to hit the surface of the material to change the physical and chemical properties of the material surface without destroying the surface characteristics of the material, thereby improving the specific surface area, pore size, pore volume, surface functional group and other related properties of the material. Compared with other surface modification technologies, plasma modification mainly has the advantages of no secondary pollution and no damage to the surface characteristics of the material. In addition, the plasma modification technology has many forms of action on the surface of the material, and the process has a wide range of applications, which is convenient for continuous automation. produce. Different discharge voltages have different effects on the surface modification of ACF. The discharge time affects the modification results, and the ACF surface active substances increase with the modification time. Plasma-modified ACF can effectively introduce nitrogen-containing functional groups to its surface, and change the morphological distribution of oxygen-containing functional groups to a certain extent, so that the basic groups on the surface of ACF and the oxidizing ability have been greatly improved, so ACF The content of basic active sites on the surface increases, and the chemical adsorption performance is greatly improved. This is of great positive significance for desulfurization and denitrification. Effect of Plasma Modification on the Surface Chemical Structure of Activated Carbon Fiber

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Can the plasma cleaner process powder particles? What is special

Can the plasma cleaner process powder particles? What is special

Can the plasma cleaner process powder particles? What is special: Plasma cleaning machines or plasma surface cleaning activation treatment machines are often used for plasma surface treatment of materials such as sheets, membranes, tubes or strips. Such materials are generally large in size, but in some practical applications in industrial production , It is also necessary to perform plasma surface cleaning and activation treatment on irregular small plastic metal parts, powder particles, etc. Plasma cleaners for processing powder particles are called rotary drum plasma cleaners in the industry. Depending on the processing materials and operating characteristics, there are also powder or powder plasma surface activation treatment equipment, drum plasma machines. A plasma machine with a rotating drum structure is similar in internal structure to a domestic drum washing machine. The items placed in the plasma cavity are constantly tumbling and stirring, thereby reacting with the plasma in the equipment to achieve surface modification such as cleaning, activation, and etching. Sex. Attention points of the powder particle plasma machine cleaning machine: 1. Structure design of electrode and rotating system: The design of the electrode structure is closely related to the power supply. The key is to see whether the electrode structure is a compatible discharge form or a coupled discharge form. The rotating structure has a certain degree of stability and adaptability. The combination of the two factors affects the discharge state and processing effect of the device. All have a great impact. 2. Power selection: For power frequency, there are generally three common ones, namely IF 40KHz, RF 13.56MHz, and microwave 2.45GHz. Choose according to the adopted discharge mechanism, processing purpose, application scenario, user characteristics, equipment stability, safety and cost-effectiveness. . 3. Process parameters: For any plasma machine cleaning machine surface cleaning and activation treatment equipment, the selection of appropriate process parameters is one of its cores. The subtle differences in various parameters may lead to different surface modification effects. Usually, the corresponding plasma surface treatment solution is matched according to multiple conditions such as the processed product, material, processing purpose, and target production capacity. However, for the surface modification of the plasma of the powder particle plasma machine cleaning machine, due to the difficulty of subsequent detection, the in-depth understanding of industry and technology is also the plasma of powder particle plasma and irregular small plastic metal parts. The bulk plasma modification provides the premise and guarantee.

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Surface modification treatment of inorganic and organic materials by plasma surface cleaning system

Surface modification treatment of inorganic and organic materials by plasma surface cleaning system

Surface modification treatment of inorganic and organic materials by plasma surface cleaning system: Due to the in-depth development and application of porous materials, more and more porous materials use plasma surface cleaning system for surface modification. Today, we mainly introduce the surface modification technology of plasma surface cleaning system, and introduce some application examples in combination with the actual situation for everyone For reference, I hope it helps everyone. This article takes porous silicon materials and activated carbon materials as examples to introduce the surface modification treatment technology of organic and inorganic porous materials. 1. Porous silicon material: The plasma surface cleaning system uses nitrogen plasma to plasma-modify the porous silicon material, which can maintain the pore structure of the porous silicon material, improve the light transmission effect, and reduce the light absorption loss. At the same time, it will also have a certain impact on the internal silicon atoms. In terms of refractive index, plasma surface modification will have a certain impact on it. 2. Activated carbon material: The plasma surface cleaning system is used to modify the granular activated carbon. Although the surface area of ​​the activated carbon is reduced, the number of macropores on the surface will be increased, and the concentration of surface acidic functional groups will be increased to make it more resistant to metal ions such as copper ions and zinc ions. Increase the adsorption capacity of the material, thereby increasing the adsorption capacity of the material: Used for organic porous materials, including but not limited to the following aspects. 1. Porous ultrafiltration high polymer film: The use of plasma surface cleaning system to treat porous ultrafiltration polymer membranes can increase the surface tension and hydrophilicity of the membranes, improve the filtration performance of the ultrafiltration membranes for buffers and protein components, and improve the filtration indicators of the membranes. Through plasma surface modification, the pore size and porosity of the ultrafiltration membrane can be increased. 2. Two or more synthetic fiber materials: The plasma surface cleaning system is used to oxidize the surface of synthetic fiber materials, which can increase the oxygen content on the surface of the fiber and enhance the hydrophilicity of the fiber. In addition, in the plasma, high-energy ions will bombard the surface of the fiber, which may slightly decrease its tensile strength. If you want to know more, please feel free to inquire at any time, and we will answer all kinds of questions about material design and craftsmanship for free.

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