High‑Performance Plastics: Essential Materials for Modern Semiconductor Fabrication

High‑performance plastics are indispensable in semiconductor manufacturing, where precision and contamination control are paramount. The fabrication process begins with silicon wafers and a fully integrated facility—commonly referred to as a fab—whose construction can reach several billion dollars. At the heart of every fab lies the cleanroom.

Dust is meticulously controlled; even the smallest speck can damage an IC. The facility is vibration‑damped, and temperature and humidity are tightly regulated to suppress static discharge.

Integrated circuits are produced through a sequence of steps—photolithography, etching, cleaning, thin‑film deposition, and polishing—that require roughly 270 chemicals and gases¹. Many of these substances, such as nitric acid, hydrochloric and hydrofluoric acids, and ozone, are highly corrosive. Metals can corrode, generating unacceptable particulate levels and causing equipment failures. High‑performance plastics, however, excel in these hostile environments.

Top ten performance criteria for high‑performance plastics in semiconductor fabrication:

1. Exceptional chemical resistance to prevent corrosion.
2. Minimal particle generation for higher yield.
3. Low outgassing and moisture absorption in vacuum conditions.
4. Superior high‑temperature capability.
5. Excellent electrical insulation with a low dielectric constant.
6. Dimensional stability and creep resistance for extended service life.
7. Low metal‑ion content to keep extractables minimal in high‑purity chemicals.
8. Excellent machinability.
9. Flame retardancy.
10. Low thermal conductivity.

How these plastics are applied: Semiconductor equipment spans a wide range, but high‑performance plastics are most critical in wet‑bench systems. These benches perform acid etching, rinsing, and drying—processes that demand maximum purity and guard against chemical carry‑over or wafer contamination during drying.

Watch this YouTube video of a wet bench in action!
[Video Link]

Common high‑performance plastics used in wet‑bench components include: PVDF (poly‑vinylidene fluoride), PP² (polypropylene), PTFE (polytetrafluoroethylene), FEP (fluorinated ethylene propylene), PFA (perfluoroalkoxy), CPVC (chlorinated polyvinyl chloride), ECTFE (ethylene chlorotrifluoroethylene), and PCTFE (polychlorotrifluoroethylene).

These materials form tanks, fittings, screws, gaskets, spacers, housings, wafer‑carrying trays, handles, hinges, sheets, tubing, and pumps. Their chemical resistance and durability make them indispensable for maintaining process integrity.

Without high‑performance plastics, the personal computers, smartphones, and flat‑screen TVs that define the information age would be unthinkable.

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¹ According to HANDBOOK OF CHEMICALS AND GASES FOR THE SEMICONDUCTOR INDUSTRY published by Wiley.

² Homopolymer.

Check back soon for a continuation that focuses specifically on the high‑performance plastics used in the semiconductor industry and includes detailed property data!

Looking for more information on chemical resistance in high‑performance plastics? Check out our Material Guide!