Parylene F / AF-4 Dimer – Fluorinated Polymer for Extreme Environments & Low Dielectric Constant
Overview
Parylene F / AF-4 dimer is a fluorinated Parylene precursor engineered for very low dielectric constant (low-k), high temperature tolerance and excellent chemical resistance. SCH Services Ltd supplies high-purity, batch-traceable AF-4 suitable for all major commercial Parylene deposition systems.
Why Choose Parylene F / AF-4 Dimer?
- Low dielectric constant for RF, high-speed digital and sensitive analog designs.
- High temperature capability with strong thermal stability vs N/C grades.
- Excellent chemical resistance due to fluorinated backbone.
- Optically clean films with uniform, pinhole-free coverage.
Typical Applications for AF-4
- Semiconductor and advanced packaging (low-k needs)
- Optoelectronic modules and sensors
- Medical implants and critical medical electronics
- Harsh-environment aerospace and defence electronics
Quality, Traceability & Packaging
- High-purity grade suitable for commercial AF-4 deposition
- Batch-coded, vacuum-sealed containers for shelf life and integrity
- Standard packs: 10 g, 50 g, 100 g, 1 kg (custom sizes available)
- Certificate of Conformity and handling guidance supplied
Independent SGS Verification – SCH Parylene Materials
Independent SGS testing throughout 2025 confirmed that all SCH Parylene materials (including Parylene N, C, D and fluorinated F/AF-4) contain no detectable Substances of Very High Concern (SVHCs), polycyclic aromatic hydrocarbons (PAHs), or PFOS/PFOA compounds to ppm-level detection limits.
Applicable fluorinated grades also meet full RoHS 2.0 (2015/863) compliance. This independent verification demonstrates ultra-high-purity feedstock (>99.9 % equivalent), supporting stable polymerisation, high dielectric performance and pinhole-free coatings across the entire SCH Parylene range.
Verified by SGS-CSTC Standards Technical Services Co., Ltd – Full test reports available on request (2025).
Find out more about why Parylene dimer purity affects coating quality in our Dimers Hub.
Handling & Storage (Summary)
Store sealed in original containers, away from heat and moisture. Open only in controlled environments in line with your SOPs. Follow the supplied safety and handling guidance.
Compare with Other Parylene Dimers
Technical Background
For chemistry and selection detail, 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 Parylene chemistry related to conformal coatings.
Request Parylene F / AF-4 Dimer Pricing or Technical Data
Tell us your pack size and delivery location. We’ll confirm availability and lead time.
📞 +44 (0)1226 249019
FAQs
Is AF-4 compatible with my deposition system?
Yes — SCH-supplied AF-4 dimer is suitable for all mainstream commercial Parylene systems. Share your make/model if you’d like us to verify.
What pack sizes are available?
Standard packs include 50 g, 100 g and 1 kg. Custom sizes and private-label supply available on request.
Why choose AF-4 over Parylene C or D?
Choose AF-4 where low dielectric constant, high temperature performance and chemical resistance are critical (e.g., semiconductor, optoelectronic and implantable applications).
Useful Links
Why Choose SCH Services?
Partnering with SCH Services means more than just outsourcing — you gain a complete, integrated platform for
Conformal Coating, Parylene & ProShieldESD Solutions, alongside equipment, materials, and training, all backed by decades of hands-on expertise.
- ✈️ 25+ Years of Expertise – Specialists in coating technologies trusted by aerospace, medical, defence, automotive, and electronics industries worldwide.
- 🛠️ End-to-End Support – Guidance on coating selection, Parylene grades, masking strategies, application methods, inspection, and ProShieldESD integration.
- 📈 Scalable Solutions – From small prototype batches to full-scale, high-volume production, SCH delivers flexible capacity that grows with your needs.
- 🌍 Global Reach – Responsive technical support and supply coverage across Europe, North America, and Asia.
- ✅ Proven Reliability – A strong reputation built on quality, consistency, and customer satisfaction across services, equipment, and materials.
📞 Call: +44 (0)1226 249019
✉ Email: sales@schservices.com
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