High-performance plastics for the semiconductor industry

High Performance Plastics in the Semi-conductor Industry

High-performance plastics serve a critical role in the semiconductor industry by meeting the stringent requirements necessary for producing high-quality electronic components. These materials are designed to withstand extreme conditions, making them invaluable in environments where traditional plastics would fail.

Thermal InsulationThermal Stability and Electrical Insulation

One of the primary reasons high-performance plastics are favoured in semiconductor applications is their exceptional thermal stability. During the manufacture and operation of semiconductors, temperatures can soar, demanding materials that maintain integrity without deforming. For instance, polyimides and polyetheretherketone (PEEK) are often used due to their ability to maintain stability at high temperatures.

In addition to thermal stability, electrical insulation is crucial. High-performance plastics like polyimides provide excellent dielectric properties, ensuring that electronic components remain insulated and free from electrical interference. This is particularly important in preventing short circuits and enhancing the overall reliability of semiconductor devices.

High chemical resistanceChemical Resistance

The semiconductor manufacturing process involves exposure to a wide array of chemicals, from etching solutions to cleaning agents. Fluoropolymers such as PTFE excel in these environments due to their superior chemical resistance. They can withstand corrosive substances without degrading, ensuring that components are protected throughout the manufacturing process.

This robust chemical resistance is vital for maintaining the purity and precision required in semiconductor production. Polytetrafluoroethylene (PTFE) is often used in wafer processing equipment, where it’s resistance to harsh chemicals plays a crucial role in preserving the quality and performance of semiconductors.

High Mechanical StrengthMechanical Strength and Durability

The mechanical strength of high-performance plastics is another asset that cannot be overlooked. In semiconductor manufacturing, materials must endure rigorous processes and handling without compromising structural integrity. Plastics such as PEEK offer high tensile strength and durability, enabling them to withstand mechanical stresses and wear over time.

These materials are particularly useful in components like chip carriers and sockets, where mechanical stability is essential for maintaining connectivity and performance. The durability of high-performance plastics contributes to the longevity of semiconductor devices, reducing the need for frequent replacements and contributing to cost-efficiency in production.

Benefits and Applications

Here are some key high-performance plastics used in the semiconductor industry, along with their benefits and applications:

Perfluoroalkoxy (PFA) 

Benefits:

  • High purity, making it ideal for ultrapure water (UPW) and chemical handling 
  • Excellent chemical resistance 
  • Thermal stability up to 260°C (500°F) without degradation 
  • Low particle generation prevents contamination in critical semiconductor processes.
  • Non-stick surface, it reduces chemical build-up and makes cleaning easier.

Applications:

PFA Chemical Storage & Transport: Used in piping, valves, and fittings for handling high-purity acids and solvents.

Wafer Processing Equipment: Lining for tanks, baths, and spray nozzles in chemical etching and cleaning processes.

Tubes & Hoses: Used in UPW and chemical delivery systems to prevent contamination.


Polyvinylidene Fluoride (PVDF) 

Benefits:

  • Good chemical resistance: Suitable for mild acids, bases, and solvents 
  • Mechanical strength & durability 
  • Moderate temperature resistance: Can withstand up to 150°C (302°F) 
  • Good electrical insulation properties: Useful in electronic applications 

Applications:

pvdf UPW filtration membranes 1Filtration & Piping Systems: Used in chemical distribution lines, UPW filtration membranes, and gas purification systems.

Process Equipment Components: Valve bodies, pumps, and fittings for semiconductor fabrication.

Membranes for Filtration: Used in microfiltration and nanofiltration of chemicals and water.


Polyimide (PI)

Benefits:

  • High thermal stability, up to 400°C (752°F)
  • Excellent electrical insulation properties
  • Chemical resistance to solvents and harsh environments
  • Good dimensional stability and low coefficient of thermal expansion (CTE)

Flex printed circuit and small electronic components in plastic strip curled into circle on a dark background

Applications:

Flexible printed circuits (FPCs): Used as an insulating substrate in flexible electronics due to its ability to withstand high temperatures and maintain its properties.

Semiconductor wafer carriers: Polyimide is used in wafer transport and handling as it protects the delicate surfaces during the manufacturing process.


Polytetrafluoroethylene (PTFE/Teflon)

Benefits:

    • Exceptional chemical resistance
    • Low friction and non-stick properties
    • Excellent dielectric properties
    • High temperature resistance (up to 260°C or 500°F)

wafers and microcircuits with automation system control application on automate robot arm Applications:

Vacuum chambers and equipment: Used in semiconductor manufacturing tools and systems exposed to aggressive chemicals and high temperatures.

Semiconductor etching: PTFE components are used in processes like plasma etching where resistance to aggressive chemicals and heat is essential.


Polyetheretherketone (PEEK)

Benefits:

    • High mechanical strength and wear resistance
    • Excellent thermal stability up to 260°C (500°F)
    • Good chemical resistance, particularly to acids and bases
    • Excellent electrical insulation properties

Processor socketApplications:

Wafer carriers and trays: PEEK is used in semiconductor manufacturing equipment for wafer transport and handling due to its high strength and dimensional stability.

Semiconductor assembly tools: PEEK is used in parts such as nozzles and components for packaging processes because of its strength and resistance to wear and thermal degradation.


Polyphenylene Sulphide (PPS)

Benefits:

    • Excellent thermal stability (up to 260°C)
    • High chemical resistance to solvents and oils
    • Good electrical insulating properties
    • Dimensional stability under high temperatures

Central processing unit CPU processor microchip in the packaging box 2Applications:

Semiconductor packaging: PPS is used in the manufacture of packaging materials for semiconductor chips due to its good mechanical properties and thermal stability.

Electrical connectors: PPS is used in connectors and other components that require high performance in harsh chemical environments.


Polyetherimide (PEI)

Benefits:

    • High thermal and dimensional stability (up to 200°C)
    • Excellent electrical insulation properties
    • Resistant to a wide range of chemicals
    • High strength and rigidity

wafer handlerApplications:

Semiconductor wafer carriers: PEI is often used in equipment that handles silicon wafers due to its thermal and electrical properties.

Precision components: Used in applications where tight tolerances and high rigidity are needed, such as in semiconductor processing equipment.

 


Polyamide/Polyimide (PAI)

Benefits:

    • Excellent mechanical strength and rigidity
    • High thermal stability (up to 270°C or 518°F)
    • Low wear and friction properties
    • Good electrical insulating properties

plastic gearsApplications:

Precision components in semiconductor manufacturing: PAI is used in parts that need to maintain high strength and dimensional stability under high heat, such as in semiconductor assembly and testing tools.

Bearings and gears: PAI is used in non-lubricated bearings and gears in semiconductor equipment that operates under high temperature and stress.


Fluorinated Ethylene Propylene (FEP)

Benefits:

    • High chemical resistance and low friction
    • Good electrical insulator
    • Stable at high temperatures (up to 200°C or 392°F)
    • High clarity and low moisture absorption

wire and cable insulationApplications:

Semiconductor wafer handling: FEP is used for coatings and in wafer processing tools, providing excellent non-stick and anti-corrosion properties.

Cable insulation: FEP is commonly used for wire and cable insulation in semiconductor devices because of its electrical and thermal resistance.


Conclusion:

High-performance plastics are critical in the semiconductor industry for their ability to withstand harsh processing conditions such as high temperatures, exposure to chemicals, and mechanical stress. They are widely used in applications like wafer handling, packaging, cable insulation, and various parts of semiconductor fabrication equipment. Their properties make them indispensable for ensuring the reliability and performance of semiconductor devices.

 

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