Summary

The EU’s universal PFAS restriction proposal remains under scientific evaluation and subsequent decision-making procedures, and the final scope of restriction, industry transition periods, and conditions for specific uses have not yet been fully determined. However, the withdrawal of material manufacturers, customer requirements to reduce fluorinated substances, and increasing pressure for compositional traceability are already affecting the semiconductor supply chain.

When changes occur in photolithography formulations, process chemicals, fluoropolymer components, sealing materials, or heat-transfer fluids, replacement usually cannot be completed solely on the basis of similar specifications. A material change may trigger successive evaluations of fundamental performance, equipment compatibility, wafer processes, and customer change approval, extending supply risk from raw-material lead times to validation scheduling and production release.

Semiconductor PFAS supply-chain risk refers to the extended implementation cycle that occurs when fluorinated process materials or equipment components are changed because of regulatory requirements, product discontinuation, or customer requirements, requiring renewed validation at the material, equipment, wafer, and customer levels.

What Stage Have the EU PFAS Restrictions Reached?

In March 2026, the European Chemicals Agency’s Committee for Risk Assessment adopted its final opinion on the universal PFAS restriction proposal. The Committee for Socio-Economic Analysis subsequently prepared a draft opinion and conducted a public consultation. The consultation ended in May 2026, and a final socio-economic opinion still needs to be completed before the proposal proceeds to the European Commission’s legislative decision-making process.

This means that the EU has not yet imposed a comprehensive ban on the use of PFAS in the semiconductor industry, and the restriction proposal cannot be treated as legislation already in force. The final scope of application, transition arrangements, conditions for specific uses, and emission-management requirements will depend on the subsequent official regulatory text.

However, supply-chain adjustments usually begin before regulations take effect. Some customers have already started requesting more complete substance information, descriptions of use, substitution plans, and change timelines from suppliers. The withdrawal of material manufacturers from PFAS businesses may also affect product availability, minimum order quantities, and delivery schedules before the regulations are formally adopted.

3M completed its exit from PFAS manufacturing by the end of 2025. For third-party seals, printed circuit boards, components, and other PFAS-containing products, some conversion, customer requalification, and alternative-material confirmation activities are still continuing. This demonstrates that actual supply risk is not determined solely by the effective date of a regulation.

Why PFAS Cannot Be Directly Replaced Across the Semiconductor Supply Chain

PFAS is not a single material but a broad category that includes multiple chemical structures, polymers, fluids, and gases. Different PFAS substances perform different functions in semiconductor manufacturing.

Some materials are used to reduce surface tension and improve wetting. Others provide resistance to strong acids, strong alkalis, high temperatures, plasma, or vacuum environments. Certain materials are also used to provide electrical insulation, low volatility, low friction, or low extractables.

Semiconductor manufacturing is highly sensitive to trace contamination and process variation. Even when a proposed alternative meets one fundamental performance requirement, it may create new problems in other areas:

• Wetting performance may be similar, while wafer residue or foaming increases.
• A polymer may provide sufficient temperature resistance but fail to meet ionic extractables or particle requirements.
• A sealing material may withstand short-term chemical exposure but develop leakage after long-term compression.
• A heat-transfer fluid may provide acceptable thermal performance but differ in viscosity, dielectric properties, or flammability.
• A process gas may complete the required reaction but alter etch selectivity or chamber residue.

PFAS substitution is therefore not simply a change in the purchased material name. It is a combined change involving the material, formulation, equipment, and process conditions.

Where PFAS Is Mainly Used in the Semiconductor Supply Chain

Risk cannot be assessed solely by material name. The validation depth may be completely different when the same polymer is used in an ordinary structural component rather than in a component that directly contacts high-purity process chemicals.

How Candidate Materials Should Be Screened for Different Applications

Photolithography and Wet-Process Formulations

Fluorinated surfactants or functional additives may be used to control wetting, leveling, coating, and drying behavior. Potential directions include non-fluorinated surfactants, polymeric wetting agents, and formulation rebalancing through adjustments to the solvent system, dosage, and coating parameters.

Surface tension reflects only part of the required performance. Practical screening also needs to examine:

• The dynamic spreading rate of the liquid on the wafer surface;
• Film-thickness uniformity at the center, edge, and under different spin speeds;
• Residual film and particles after development or cleaning;
• Changes in effective concentration after the formulation passes through filters;
• Precipitation, phase separation, and performance drift during extended storage.

A formulation that performs normally on a glass substrate may not maintain the same performance under actual wafer, cleanroom humidity, and production-equipment conditions. Similar validation principles can also be applied when evaluating PFAS-free surfactant replacement, including wetting, foam, residue, stability, and production-line performance.

Process Chemicals and Reactive Gases

Fluorinated materials used in etching, deposition, and chamber cleaning may participate directly in the reaction. For these applications, reducing consumption, improving reaction utilization, optimizing exhaust-gas treatment, and developing new process routes often need to proceed in parallel rather than relying solely on a chemically similar substitute.

After a material change, the following typically need to be reconfirmed:

• Etch or deposition rate;
• Selectivity between different film layers;
• Sidewall profile and critical dimensions;
• Chamber deposits and particles;
• Equipment-cleaning frequency;
• Compatibility with exhaust-gas treatment systems.

A lower raw-material price does not necessarily mean a lower overall conversion cost. A narrower process window, more frequent equipment cleaning, or yield fluctuations may result in higher total costs.

Piping, Valves, and High-Purity Fluid-Contact Components

PEEK, PPS, high-purity polyolefins, ceramics, and metallic materials may be screened as candidates for certain components, but they cannot be regarded as universal equivalent replacements for PTFE, PFA, or FEP.

Material selection needs to consider:

• The specific composition and concentration of the contacting medium;
• Operating temperature, pressure, and contact duration;
• Whether the material is exposed to vacuum or plasma;
• Whether welding, mechanical connections, or composite structures are permitted;
• Control requirements for metal ions, particles, and organic extractables;
• Whether failure could contaminate the entire fluid-delivery system.

Corrosion resistance of the base resin does not necessarily mean that the finished component is suitable. Fillers, pigments, processing aids, mold-release agents, and surface treatments may also affect cleanliness.

Sealing Materials

EPDM, HNBR, silicone rubber, and other non-fluorinated elastomers may have application potential in some mild media, water systems, or general gas systems. However, substitution is usually more difficult under high-temperature, strongly corrosive, vacuum, or plasma conditions.

Validation of sealing materials cannot rely only on short-term immersion tests. The more important question is whether the material can maintain its dimensions and sealing force after long-term compression, thermal cycling, and media exposure.

Compression set reflects the ability of a material to recover its original shape after pressure is removed. An abnormal value may indicate that sealing force decreases over time. Microleakage may occur even when there is no visible surface damage.

Heat-Transfer Fluids and Lubrication Systems

Water-glycol systems, hydrocarbon fluids, ester-based fluids, silicone-based fluids, and other dielectric media may be screened according to equipment conditions, but there is no single solution suitable for all semiconductor temperature-control equipment.

The following need to be compared simultaneously:

• Low-temperature viscosity and circulation pressure drop;
• Specific heat and heat-transfer efficiency;
• Dielectric strength;
• Vapor pressure and evaporation loss;
• Flash point and equipment safety requirements;
• Effects on hoses, pump bodies, seals, and heat-exchanger materials;
• Consequences of leakage for the cleanroom and wafers.

A fluid change may also affect pump selection, leak detection, fire-safety conditions, and maintenance procedures. It should not be evaluated only on the basis of unit purchase price.

Why Material Changes Trigger Multi-Level Requalification

The actual performance of semiconductor materials is interdependent with formulations, equipment, process nodes, and downstream products. Similar basic specifications indicate only that candidate materials can enter preliminary comparison. They do not demonstrate that the materials can be introduced directly into production.

Material-Level Validation

Material-level validation first confirms composition, purity, physical properties, chemical resistance, extractables, particles, and storage stability.

This stage is mainly used to eliminate clearly unsuitable options and establish a baseline comparison between the existing and proposed materials.

Equipment-Level Validation

Equipment-level validation examines the actual performance of candidate materials in piping, pumps, valves, seals, filters, and process chambers, including:

• Leakage and pressure drop;
• Corrosion, swelling, or embrittlement;
• Adsorption and loss of effective concentration;
• Release of ions, particles, and organic substances;
• Vacuum outgassing;
• Changes in equipment-maintenance frequency.

Some problems appear only after extended operation, thermal cycling, or shutdown and restart.

Wafer- and Process-Level Validation

This stage uses actual processes to confirm defect density, critical dimensions, etch morphology, film properties, metal contamination, particles, and yield.

Even when a candidate material does not directly contact the wafer, trace extractables may enter the process through fluids, gases, filters, or equipment surfaces.

Customer- and Product-Level Approval

A material change may also trigger internal change control, reliability testing, customer notification, and multi-site validation.

Automotive-grade, high-reliability, and long-lifecycle devices generally require stricter change approval. At this point, lead time includes not only material production but also equipment scheduling, test wafers, data review, and customer confirmation.

A complete conversion path generally follows:

Composition Identification → Candidate-Material Screening → Sample Preparation → Fundamental Testing → Equipment Compatibility → Wafer Testing → Reliability and Customer Approval → Production Release

Material Change, Requalification, and Lead-Time Risk Matrix

The highest-risk items are often not the most expensive materials, but those that perform functions that are difficult to replace, require deep validation, have limited supply sources, and lack sufficient inventory coverage.

The following qualitative model can be used to determine assessment priorities:

Supply-Risk Priority = Functional Non-Substitutability × Requalification Depth × Single-Source Dependence × Inventory Gap

This model is not intended to calculate a standardized score. It is used to help R&D, production, quality, and supply-chain teams identify which substitution projects should be initiated first.

Why Requalification Further Extends Supply Lead Times

Reduced Number of Supply Sources

When existing manufacturers withdraw from or reduce PFAS product portfolios, demand may shift toward a limited number of remaining suppliers. Custom grades, high-purity grades, and materials requiring specialized packaging have fewer alternative sources, potentially affecting minimum order quantities, capacity allocation, and delivery confirmation cycles.

Queues for Samples and Validation Resources

When multiple wafer fabs, equipment manufacturers, and material suppliers initiate substitution projects at the same time, the bottleneck may not occur in production equipment. It may instead arise in application laboratories, pilot facilities, wafer test lines, and customer-approval resources.

A supplier’s ability to provide a laboratory sample does not mean that stable commercial supply has been established. It is necessary to confirm separately whether the sample and future production material use the same raw materials, purification route, manufacturing equipment, and packaging system.

Incomplete Material Information

PFAS may be present in principal components, trace additives, polymer processing aids, lubricants, surface treatments, or packaging contact components.

An SDS is primarily used to communicate hazard information and does not necessarily list all low-concentration or non-hazardous components. Relying on an SDS alone is therefore generally insufficient to determine whether a product falls within a specific PFAS definition.

Different Definitions Across Regions

“No intentionally added PFAS” means that the supplier has not intentionally added PFAS covered by the definition used in its declaration. It does not mean that all PFAS are absent from the product, nor is it equivalent to an unconditional “PFAS-free” claim.

A substance declaration needs to specify:

• Which regulation or structural definition is used;
• Whether fluoropolymers are included;
• Whether processing aids and surface treatments are covered;
• Whether impurities and reaction by-products are considered;
• Whether the declaration applies to the raw material, formulation, packaging, or complete component.

Targeted PFAS analysis can confirm specific substances, while total fluorine or organic fluorine screening can provide broader indications of fluorine content. However, no single test result should be interpreted independently of material-composition and manufacturing information.

What Information Should Be Confirmed from Supplier Screening Through Sample Validation?

Composition and Regulatory Scope

It is necessary to confirm whether the product contains intentionally added PFAS and whether the definition used includes fluoropolymers, processing aids, impurities, and packaging contact materials.

Supply Continuity

Raw-material sources, manufacturing locations, discontinuation plans, capacity changes, and inventory strategies need to be understood. For single-source materials, existing inventory coverage and the expected requalification level for the substitution project should be reviewed together.

Consistency Between Samples and Commercial Batches

Laboratory samples and future production grades should be checked to determine whether they use the same raw materials, purification process, filtration conditions, and packaging materials.

If samples are produced through a temporary route or pilot-scale equipment, the validation results cannot directly represent future commercial batches. The same distinction is important in electronic-grade chemical quality control, where metal ions, moisture, particles, packaging, and batch consistency can affect process performance.

Change Management

Changes in formulation, raw-material source, manufacturing location, production equipment, and packaging system may all affect semiconductor-material performance. A supplier’s ability to provide advance notification and comparative data for old and new versions directly affects internal validation scheduling.

Validation Support Capability

In addition to providing basic specifications, suppliers need to explain differences between candidate and existing materials and support the provision of samples, multi-batch data, and necessary substance information.

Which Material Categories Will Receive Greater Attention?

Electronic-Grade Wetting Agents and Functional Additives

Evaluation will expand beyond basic active-content levels to dynamic wetting, foaming, oligomers, filter adsorption, metal ions, and wafer residue.

High-Purity Process Chemicals and Intermediates

Formulation changes may affect trace metals, moisture, particles, and reaction by-products. It is necessary to determine whether PFAS originates from the principal component, stabilizer, functional additive, production process, or packaging system.

Functional Molecules for Electronic Materials

New molecules used for photolithography, interface control, and surface treatment need to address performance, purification, trace impurities, and batch stability simultaneously. Successful molecular synthesis does not mean that electronic-grade supply capability has been established.

High-Purity Polymers and Contact Materials

Different grades with the same polymer name may use different fillers, processing aids, and manufacturing routes. Actual applications should therefore validate the specific grade and finished component.

What Needs Attention in the Short, Medium, and Long Term?

Short Term: Establish a PFAS Use and Supply-Risk Inventory

Priority should be given to identifying:

• Single-source materials;
• Grades for which discontinuation or formulation-change notices have already been received;
• Components that directly contact high-purity chemicals or process gases;
• Materials requiring wafer or customer approval;
• Materials for which inventory coverage is shorter than the expected requalification period.

Medium Term: Advance Substitution, Reduction, and Emission Control in Parallel

Applications with feasible alternatives should enter sample and equipment validation. Applications that currently lack equivalent options need parallel evaluation of consumption optimization, recovery, exhaust-gas treatment, and emission management.

A substitution plan should include the complete validation path rather than recording only the expected arrival date of the candidate material.

Long Term: Include Material Transparency in Supply Capability

Semiconductor-material supply capability will depend not only on purity, price, and capacity, but also on:

• Substance-information transparency;
• Cross-regional regulatory response;
• Change-notification mechanisms;
• Multi-batch stability;
• Alternative-development and sample-support capability;
• Long-term capacity planning.

A supplier’s ability to explain why PFAS is used, whether candidate routes currently exist, and what validation is required for conversion provides more decision-making value than a statement of compliance without clearly defined boundaries.

Material Support Available from ChemicalCell

Through its materials science and semiconductor materials capabilities, ChemicalCell can support the confirmation of target functions, fundamental specifications, sample conditions, and documentation scope for electronic-material intermediates, functional additives, fine chemicals, and custom-synthesis requirements.

PFAS-related material inquiries should specify the application location, contacting medium, operating temperature, critical performance requirements that must be retained, the PFAS definition being applied, and the expected validation program. For equipment components, specialty gases, dedicated sealing materials, and heat-transfer fluids, supply feasibility needs to be confirmed separately according to the product category and application conditions.

Before candidate materials enter production, the actual user still needs to complete formulation, equipment, wafer, and product-reliability validation.

FAQ

Has the EU Already Imposed a Comprehensive Ban on PFAS Use in the Semiconductor Industry?

No. The EU universal PFAS restriction remains in the scientific-opinion and subsequent legislative decision-making stages. The final scope of application, conditions for specific uses, and transition arrangements will depend on the official regulatory text. The restriction proposal should not be treated as a comprehensive ban already in force.

Is “No Intentionally Added PFAS” Equivalent to “PFAS-Free”?

No. The former generally means only that the supplier has not intentionally added PFAS covered by the scope of its declaration. It does not necessarily cover impurities, processing aids, manufacturing contact materials, or packaging components. When using such a declaration, the PFAS definition and scope of coverage also need to be confirmed.

Can PEEK or PPS Directly Replace PTFE and PFA?

Not as universal replacements. PEEK and PPS may be screened for certain structural components or specific chemical environments, but chemical resistance, processing method, extractables, sealing performance, and operating temperature need to be revalidated for each specific component.

Why Can a Change in a Small Amount of Formulation Additive Trigger Requalification?

A trace additive may alter wetting, filtration, interfacial behavior, wafer residue, and particle levels. Even at a low concentration, it may affect defect density, critical dimensions, and the process window. Validation under actual formulation and equipment conditions is therefore required.

Which Materials Should Be Prioritized for Supply-Continuity Assessment?

Materials that are difficult to replace functionally, rely on a single source, require multi-level requalification, and have insufficient inventory coverage should be assessed first. Materials for which discontinuation, formulation, manufacturing-location, or raw-material change notices have already been received should also enter risk review as early as possible.

RFQ and Sample Request Information

When submitting an inquiry for PFAS-related electronic materials, functional additives, or custom synthesis, the following information may be provided:

• Current material name, function, and application location;
• Contacting medium, operating temperature, and process conditions;
• Critical performance requirements that must be retained;
• Applied PFAS definition and target market;
• Purity, trace-metal, moisture, or particle requirements;
• Whether a discontinuation or change notice currently exists;
• Expected inventory coverage period;
• Required material-, equipment-, wafer-, or customer-level requalification;
• Sample quantity, commercial demand, and target implementation timeline;
• Required specifications, substance declarations, and technical documentation.

To evaluate candidate electronic-material intermediates, functional additives, or custom-synthesis options, current material functions, critical specifications, and sample-validation requirements may be submitted for further confirmation of potentially matching product categories and supply conditions.