Parylene F / AF-4 Dimer – Fluorinated Material for Low Dielectric Performance & Demanding Environments
High-purity fluorinated Parylene dimer for advanced dielectric performance, thermal stability, and high-reliability applications
Parylene F / AF-4 dimer is a fluorinated Parylene precursor selected where very low dielectric constant, enhanced thermal stability, UV resistance, and strong environmental performance are required.
SCH Services supplies high-purity, batch-traceable Parylene F dimer for use in commercial and R&D chemical vapour deposition (CVD) systems across electronics, aerospace, medical, semiconductor, and research environments.
This material is supported by controlled specification, batch documentation, and independent third-party screening data, helping customers assess both technical suitability and compliance support for demanding applications.
Why Choose Parylene F / AF-4 Dimer?
- Very Low Dielectric Constant – suited to RF, high-speed digital, MEMS, semiconductor and other electrically sensitive applications.
- Enhanced Thermal Stability – fluorinated chemistry supports use in more demanding thermal environments than standard Parylene grades.
- Improved UV & Environmental Resistance – selected where harsher operating conditions or extended exposure performance matter.
- Controlled & Traceable Supply – supported by technical documentation, batch traceability, and independent SGS screening.
Typical Parylene F / AF-4 Applications
Parylene F is typically selected when standard grades are not sufficient from a dielectric, temperature, or environmental resistance perspective.
- Semiconductor and advanced packaging applications
- MEMS and precision sensor assemblies
- Optoelectronic modules and high-performance electronics
- Medical devices requiring thin-film protection in demanding environments
- Aerospace and other high-reliability systems
- Research and development programmes involving advanced fluorinated coatings
Not sure which dimer is right for your application? See our guide to choosing the right Parylene dimer.
Material Specification Summary
SCH Parylene F dimer is supplied as a high-purity solid precursor for chemical vapour deposition (CVD) processes.
- Main component purity: ≥ 98%
- Controlled isomer distribution
- Loss on drying: ≤ 0.5%
- Melting point: 320 ±5°C
- Appearance: Off-white to white powder
- Structure: Lamellar crystalline form
The material is supplied to support stable sublimation behaviour, consistent vapour phase deposition, and reproducible coating performance. Its fluorinated structure supports improved high-temperature stability and environmental resistance compared with standard Parylene grades.
Regulatory & Compliance Support
Parylene F dimer supplied by SCH is supported by controlled documentation and independent screening data for customers working in regulated, technical, and high-reliability sectors.
- Safety Data Sheet (SDS) prepared in line with REACH Regulation (EC) No. 1907/2006, CLP Regulation (EC) No. 1272/2008, and Regulation (EU) 2020/878
- Independent SGS screening covering REACH SVHC and RoHS compliance
- Batch-level traceability with Certificate of Conformance (CoC)
- Supporting technical documentation available for customer review and qualification work
This supports supplier review, quality documentation, and qualification processes, but final application suitability and regulatory acceptance must still be confirmed by the customer within their own process and end-use requirements.
Independent SGS Verification – Parylene F / AF-4
Independent third-party testing has been carried out by SGS to assess chemical compliance for SCH Parylene F dimer.
- REACH SVHC screening: tested in line with the latest ECHA Candidate List (253 substances) with all substances reported at ≤ 0.1% (w/w) – PASS
- Additional SVHC monitoring: additional potential high-concern substances screened with all reported at ≤ 0.1% (w/w) – PASS
- RoHS (EU Directive 2015/863): all restricted substances below specified limits – PASS
This supports the compliance position for customers assessing fluorinated Parylene materials for demanding electronics, medical, aerospace, semiconductor, and other advanced applications.
PFOS / PFOA: not included in the current standard test package. Additional testing can be provided on request where required by the application or customer compliance route.
Independent SGS data supports the material compliance position shown here. Full underlying reports and summary documents can be provided as supporting references.
Traceability, Packaging & Supply Control
- Batch-based identification and controlled supply
- Certificate of Conformance supplied with each batch
- Documentation retained and available on request
- Controlled packaging designed to minimise moisture ingress
- UK stockholding to support continuity of supply
- Standard packs: 10 g, 50 g, 100 g and 1 kg, with other pack formats available on request
This structured supply model supports both development programmes and production environments where technical control, traceability, and documentation matter.
Supporting Documentation
Supporting documents can be provided to assist technical review, supplier approval, and qualification activity.
- Technical Data Sheet (TDS) – Parylene F Dimer
- Safety Data Sheet (SDS) – Parylene F
- Parylene F Dimer Quality & Compliance Summary
- SGS Test Report – REACH SVHC Screening
- SGS Test Report – RoHS Compliance
- Certificate of Conformance (CoC)
- IPC-related compliance statement
Handling & Storage (Summary)
Store sealed in original containers under dry, controlled conditions and protect from heat and moisture. Open and handle only within defined process controls. Refer to the applicable SCH SDS, TDS, and internal handling guidance for full details.
Need to define this material on a drawing? See our guide to specifying Parylene coating.
Compare With Other Parylene Dimers
Explore alternative grades and broader selection guidance.
- Parylene C Dimer – balanced moisture and chemical resistance
- Parylene N Dimer – excellent penetration and high dielectric performance
- Parylene D Dimer – higher thermal capability than C
- Parylene F / AF-4 Dimer – fluorinated grade for low dielectric constant and demanding environments
- Parylene Dimers – overview of the full dimer range
Technical Background
For deeper technical guidance on dimer chemistry, selection, and purity control, see:
- Parylene Dimers Hub
- What is Parylene Dimer?
- Parylene Dimer Comparison (N, C, D & AF-4)
- How Dimer Purity Affects Coating Quality
- Choosing the Right Dimer for Your Application
Learn more about general Parylene chemistry.
Request Parylene F / AF-4 Dimer Pricing or Technical Data
Tell us your pack size, required quantity, and delivery location. We will confirm availability, lead time, and the relevant supporting documentation.
📞 +44 (0)1226 249019
FAQs
Why choose Parylene F / AF-4 instead of standard grades?
Do you provide compliance and screening documents?
Is PFOS / PFOA included in the standard AF-4 test package?
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Why Choose SCH Services?
Partnering with SCH Services gives you more than material supply. You gain access to a wider platform covering Parylene materials, coating services, equipment, training, and technical support, backed by practical experience in both development and production environments.
- ✈️ 25+ Years of Expertise – practical coating experience across aerospace, medical, defence, automotive, and electronics sectors.
- 🛠️ End-to-End Support – guidance on dimer selection, deposition strategy, equipment, handling, and process support.
- 📈 Scalable Supply – support from R&D quantities through to recurring production demand.
- 🌍 Global Coverage – responsive supply and technical support across the UK, Europe, and international markets.
- ✅ Structured Documentation – supporting traceability, compliance review, and customer qualification activity.
📞 Call: +44 (0)1226 249019
✉ Email: sales@schservices.com
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