Parylene AF4 NEW

Parylene AF-4 is the only parylene type that displays a consistent degree of UV-resistance, one wherein performance is maintained relatively long-term. Like the other parylene types, AF-4 also forms an effective, structurally continuous protective film as thin as several hundred angstroms, due to uniqueness of the chemical vapor deposition (CVD) process used to coat substrate surfaces.

Also called aliphatic fluorinate, AF-4 replaces the alpha hydrogen atom of the N dimer with fluorine, and totals 4 atoms. This compositional variation allows AF-4 to generate the lowest parylene coefficient of friction and dielectric constant throughout UV-exposure, and the highest penetrating ability. AF-4 is also useful in high temperature, short-term applications up to 450°C.

Basic information

Chemical Properties

Features

Characteristics of Parylen AF4 coating:

Specialties:

• Unmatched UV stability
• Excellent thermal stability at high service temperature (350)
• Unmatched oxidation stability
• Completely conformal coating
• Superior crevice penetration, pin hole free
• Anti-saline damage
• Anti-stick ion

Barrier properties:

• Chemical insolubility and solvent resistant
• Low water absorption
• Hydrophobic properties
• Low gas permeability , no out-gassing

Physical & mechanical properties:

• Transparent
• Light-weight and ultra-thin
• Low CTE
• Low coefficient of friction
• Good dry lubricity
• Abrasion resistance
• Stabilization of components and structures
• Particulate immobilization

Electrical properties:

• Electrical insulation
• High dielectric strength
• High volume resistivity ,ohm-cm
• Low dissipation factor
• Low dielectric constant
• Mitigation of tin whisker growth

Why Choose FCD as a parylene dimer supplier?

1. Comprehensive Product Range & Industry-Leading Technology

·Full Series of dimers: AF4, F, D, C, N, halogen-free, and fluorescent dimers, meeting diverse needs.

·Purity Advantage: For example, Parylene F purity >99.0%, resulting in denser films, more uniform products, and better fluidity. This means less dimer is required for the same level of protection, directly reducing your material costs.

2. Compliance Certifications & Reliability Assurance

·Legal Qualifications: A factory with legal production licenses for Parylene dimers, compliant with ISO 9001:2018.

·Medical-Grade Certification: Parylene F has passed U.S. bio-compatibility testing (USP Class VI) and has served numerous global medical device companies.

3. Full Industry Chain Support

·R&D to Delivery Under Full Control: In-house factory and technical team ensure rapid response to custom needs (e.g., fluorescent marking, special film-forming efficiency optimization).

·Cost Advantage: Large-scale production + localized services reduce costs by over 50% compared to imported products, with lead times shortened by more than 50%.

6. Successful Application Cases

·Medical Field: Provided Parylene F dimer to a globally renowned pacemaker manufacturer, replacing traditional metal encapsulation to achieve device flexibility and long-term reliability.

·Semiconductor Field: Assisted a MEMS sensor company in optimizing coating processes, improving protective performance by 15% and saving over 2 million RMB annually.

We Also Offer:

✅ Sample Testing (shipped within 1-3 working days)

✅ 15-Minute Technical Consultation (discuss your specific needs)

✅ Complete Product Manuals and Certification Documents

Shenzhen FCD Technology Co., Ltd. looks forward to exploring more possibilities of Parylene technology with you!