Why PPS is Used for Critical Semiconductor Components

Published on May 14 2026

The semiconductor industry places extreme demands on materials. Components used in wafer fabrication equipment must operate reliably in aggressive chemical environments, elevated temperatures, cleanroom conditions, and precision manufacturing systems where even microscopic contamination can affect yield.

This is why high-performance engineering polymers such as PPS (Polyphenylene Sulfide) are widely used throughout semiconductor manufacturing equipment.

PPS offers a combination of chemical resistance, dimensional stability, thermal performance, and electrical insulation that makes it particularly well suited to semiconductor applications, especially where tight tolerances and process reliability are critical.

Table of Contents

What is PPS?

Why PPS is Used in Semiconductor Manufacturing

Typical PPS Applications in the Semiconductor Industry

How PPS Compares to Other High-Performance Plastics

Why PPS Often Stands Out

Semiconductor-Grade PPS Materials

Machining and Manufacturing Considerations

Conclusion

What is PPS?

PPS is a semi-crystalline high-performance engineering thermoplastic designed for demanding industrial environments. It bridges the gap between standard engineering plastics and ultra-high-performance materials such as PEEK.

One of the key advantages of PPS is its ability to maintain mechanical strength and dimensional stability under exposure to heat, chemicals, and moisture. PPS also exhibits very low moisture absorption, excellent electrical properties, and inherent flame resistance.

These characteristics make PPS particularly attractive in semiconductor manufacturing environments, where process consistency and contamination control are essential.

Why PPS is Used in Semiconductor Manufacturing

Semiconductor fabrication environments expose materials to:

• Aggressive acids, alkalis, and solvents
• High-purity chemical delivery systems
• Elevated temperatures
• Plasma exposure
• Tight dimensional tolerances
• Cleanroom and low-contamination requirements

Traditional metals can suffer from corrosion, ion contamination, or unwanted electrical conductivity, while commodity plastics often lack the thermal or chemical resistance required.

PPS helps solve these challenges by providing:

Excellent Chemical Resistance - PPS is highly resistant to a broad range of acids, solvents, and chemicals commonly used in semiconductor wet processing and chemical handling systems.

This allows PPS components to maintain integrity and performance in chemically aggressive environments.

Exceptional Dimensional Stability - Semiconductor equipment relies on precision. PPS has extremely low moisture absorption and low thermal expansion, helping components maintain tight tolerances during operation.

This is particularly important for machined semiconductor parts where even small dimensional changes can impact wafer handling accuracy or process repeatability.

High Temperature Resistance - PPS can operate continuously at temperatures around 200–220°C, with short-term resistance to even higher temperatures depending on grade.

This enables reliable use in many semiconductor process tools and thermal environments.

Electrical Insulation Properties - PPS offers strong dielectric performance and electrical insulation characteristics, making it suitable for semiconductor electrical and electronic components.

Low Moisture Absorption - Unlike many engineering plastics, PPS absorbs very little moisture. This helps prevent dimensional drift and supports consistent performance in humid or chemically exposed environments.

Cost-Effective Alternative to PEEK - In many semiconductor applications, PPS provides sufficient performance at a lower cost than PEEK, particularly where operating temperatures are moderate rather than extreme

Typical PPS Applications in the Semiconductor Industry

PPS is used across a wide range of semiconductor equipment and tooling applications.

Typical components include:

• Chemical delivery system components
• Valve bodies and manifolds
• Pump housings
• Wafer carriers and cassette parts
• Wet process equipment components
• CMP retaining rings
• Precision machined insulators
• Semiconductor machinery components
• Electrical connectors and sockets
• PCB inspection fixtures
• Bearings and wear components

Many of these parts require high precision machining or extrusion in rod, sheet, and tube form.

How PPS Compares to Other High Performance Plastics

Material	Key Properties	Limitations	Typical Semiconductor Applications
PPS	Excellent chemical resistance, low moisture absorption, good dimensional stability, strong electrical insulation, good temperature resistance, cost-effective compared to PEEK	Lower continuous temperature capability than PEEK or PI, can become brittle under impact in some grades	Chemical handling components, PPS tube, manifolds, valve components, pump parts, wafer handling components, insulators, wet process equipment
PEEK	Exceptional mechanical strength, excellent wear resistance, very high temperature resistance, outstanding chemical resistance, excellent dimensional stability	Higher cost than PPS and many other engineering plastics	Wafer clamps, CMP components, bearings, seals, semiconductor tooling, plasma-resistant components, high-load wear parts
PTFE	Outstanding chemical resistance, extremely low friction, non-stick properties, excellent dielectric performance	Poor mechanical strength, high thermal expansion, can deform under load	Chemical lining systems, seals, gaskets, wafer process components, fluid handling systems, high-purity chemical transfer
PFA	Ultra-high purity, exceptional chemical resistance, excellent non-stick surface, weldable fluoropolymer	Lower mechanical stiffness than PPS or PEEK, relatively expensive	High-purity tubing, chemical delivery systems, semiconductor fluid handling, wafer cleaning systems
PVDF	Good chemical resistance, good mechanical properties, lower cost fluoropolymer, good processability	Lower temperature resistance than PEEK or PPS	Pipes, tanks, semiconductor chemical handling systems, filtration systems, fluid processing equipment
PEI	High strength and stiffness, good dimensional stability, excellent electrical insulation, good heat resistance	Lower chemical resistance than fluoropolymers or PPS	Electrical insulators, semiconductor test sockets, electronic housings, precision structural components
PI	Extremely high temperature resistance, excellent electrical insulation, good mechanical performance in thermal cycling	Expensive, some grades can absorb moisture	Flexible circuits, semiconductor electrical insulation, wafer processing components, high-temperature fixtures
UHMWPE	Excellent wear resistance, low friction, good impact resistance	Limited temperature capability, lower stiffness	Guide rails, low-load wear strips, handling components
ETFE	Good chemical resistance, strong mechanical toughness, good electrical properties	Lower purity performance than PFA in some ultra-clean applications	Cable insulation, fluid systems, semiconductor equipment covers and linings
ECTFE	Excellent chemical resistance, strong permeation resistance, good mechanical properties	Less common and more specialised than PTFE or PFA	Corrosion-resistant linings, chemical processing systems, semiconductor chemical containment

 

Why PPS Often Stands Out

PPS occupies an important middle ground in semiconductor manufacturing:

• More dimensionally stable and mechanically robust than many fluoropolymers
• More chemically resistant than materials such as PEI
• More cost-effective than ultra-high-performance materials like PEEK or PI
• Well suited to machined semiconductor components and extruded tube applications

This balance makes PPS particularly attractive for semiconductor OEMs and equipment manufacturers seeking performance without the cost premium of higher-end polymers.

 

Semiconductor-Grade PPS Materials

Semiconductor applications often require higher purity and tighter quality controls than general industrial applications.

Special semiconductor-grade PPS materials are designed to minimise:

• Internal stress
• Surface defects
• Particle generation
• Optical impurities
• Dimensional variation

These factors are increasingly important as semiconductor geometries become smaller and contamination tolerances become tighter.

 

Machining and Manufacturing Considerations

Manufacturing quality is just as important as material selection in semiconductor applications.

Precision machining, extrusion quality, stress control, and surface finish all influence final component performance. Semiconductor manufacturers typically require:

• Tight tolerances
• Consistent dimensional stability
• Clean machining practices
• Low particle generation
• Reliable material traceability

PPS can be supplied as rod, sheet, or tube and machined into complex components for semiconductor equipment and tooling.

Conclusion

PPS has become an important material within the semiconductor industry because it combines chemical resistance, dimensional stability, thermal performance, and electrical insulation in a cost-effective engineering polymer.

From wafer handling systems and wet process equipment to chemical delivery components and precision-machined semiconductor tooling, PPS provides reliable long-term performance in demanding fabrication environments.

As semiconductor manufacturing continues to expand globally, demand for high-performance materials such as PPS is expected to continue growing across semiconductor equipment and process applications.

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