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What is PFA resin?

PFA, a copolymer of tetrafluoroethylene (TFE) and perfluoroalkyl vinyl ether (PPVE), it has similar physical, chemical, and electrical properties to PTFE. However, PFA has a small number of perfluoroalkoxy side chains, which improves its viscosity and flowability, allowing it to be melt-processed. Therefore, PFA is called "melting polytetrafluoroethylene". PFA resin is divided into ordinary PFA and high purity PFA.

Key characteristics

Ordinary PFA has unstable terminal groups, which limits its application in fields such as semiconductors. High purity PFA reduces the number of unstable groups, further improving the stability and purity of PFA. This significantly reduces the concentration of metal ion precipitation in the product, making it widely applicable in the semiconductor industry. High purity PFA can be used to manufacture wafer baskets, pipe fittings, pumps and valves, corrosion-resistant liners, films, heat-shrinkable sleeves, etc.

Applications of high purity PFA

1.Sensor Protective Cover

Capacitive sensors protected by an ultrapure PFA housing can monitor the fluid state of highly active and reactive chemicals in storage tanks of high-purity chemical delivery and distribution systems. Furthermore, insulated electrical components and power cables made of PFA provide additional protection against corrosion and contamination.

2.Fluid Delivery Pipes 

Large quantities of ultrapure water are required in semiconductor manufacturing processes. The delivery pipelines and storage containers for ultrapure water must be designed to prevent contamination. Using high purity PFA containers and pipelines can meet these stringent requirements, significantly reducing the precipitation of metal particles and organic solvents.

3.Tank and Container Linings 

Various electronic chemicals used in the semiconductor industry require extremely high purity. High purity PFA, due to its excellent chemical resistance and low ion release, can be used as a container liner or directly in the manufacture of containers for storing and transporting electronic-grade liquids, making the hazardous chemicals with high purity requirements are easier to control in the terms of safe storage and transportation.

4.Fluid Transport Fittings

In high-purity chemical transport and distribution systems, the bushings and fittings made of ultra-pure PFA, such as pumps, pressure regulators, flow meters, filters, and valves, provide a high level of contamination protection, ensuring the highest cleanliness and integrity of critical connections.

5. Wafer Carriers

In semiconductor manufacturing, the selection of wafer carriers plays a crucial role in wafer processing and protection. Wafer carriers made from ultra-pure PFA have been widely used in the semiconductor industry due to their unique advantages. They can be used in wafer storage, transport, and processing steps such as wafer cleaning, photolithography, and etching.

Conclusion

In semiconductor manufacturing, maintain the purity of the entire system, prevent external contamination, and improve product yield are crucial, it is necessary to keep cleanliness at every step. The application of high purity PFA helps semiconductor  plants establish a complete high-purity chemical delivery and distribution system, which is important for the development of the entire semi-industry.

Learn more about ultra-pure PFA resin, pls contact Uflon.