Conductive F46 thin film silver plating - core functional material for aerospace thermal control and 5G high-frequency substrate

Advanced Institute (Shenzhen) Technology Co., Ltd. focuses on the research and production of silver plated FEP/F46 film products, which can be applied in satellite thermal control components, 5G high-frequency copper-clad laminates, chemical anti-corrosion lining, and military supporting fields.

1、 Product Overview

Conductive F46 film silver plating is a composite functional film with high infrared emissivity and conductivity formed by depositing a high pure silver layer on the surface of a polytetrafluoroethylene (FEP) film as the substrate through a roll to roll vacuum evaporation process.

Core thermal control parameters:

This parameter combination means that the material hardly absorbs solar radiation heat in the space environment, while efficiently radiating infrared thermal energy outward, achieving zero energy passive temperature control.

2、 Technical characteristics of F46 (FEP) substrate

F46, also known as perfluoroethylene propylene, is a copolymer of tetrafluoroethylene (TFE) and hexafluoropropylene (HFP) in a ratio of approximately 85:15.

Key Differences:F46 can be made into thin films and achieve mass production, PTFE cannot. F46 has a dielectric constant of approximately 2.1 and fluctuates only ± 0.02 within the range of 24-77GHz, with extremely low signal loss. It is the preferred insulation material in the field of high-frequency communication.

3、 Three major application areas

Field 1: Passive Thermal Control of Spacecraft

Working Principle:Low solar absorption and high infrared emission can maintain stable device temperature without consuming energy.

In orbit lifespan reference（LDEF facility in the United States, 550km track）：

• Annual quality loss: approximately 2.54 μ m
• 0.254mm thickness can support in orbit service for more than 30 years
• External application of 1-5 μ m SiO ₂ quartz glass protective layer can enhance the resistance to atomic oxygen corrosion

Product application scenarios:

• Outer layer film (secondary surface mirror) of thermal control multi-layer components for satellites and deep space probes
• Reflection heat dissipation layer on the surface of spacecraft

Related task information (materials of similar applications can refer to):

• Chang'e-6 spacecraft uses electrostatic F46 thin film silver plated secondary surface mirrors and conductive F46 thin film silver plated secondary surface mirrors (perforated) to provide temperature control guarantee for the normal operation of the probe in the lunar temperature difference environment
• The fifth new generation Beidou navigation satellite uses high-performance thermal control coating materials such as conductive F46 thin film silver plated secondary surface mirrors
• Silver plated FEP film products have been applied in thermal control schemes for extreme temperature difference environments (such as the lunar surface -180 ℃~130 ℃)

Field 2: 5G millimeter wave high-frequency substrate

At 28GHz frequency band, the measured transmission rate of FEP based high-frequency copper-clad laminate (FCCL) can reach20GbpsThe traditional PI substrate solution is about 4Gbps.

Technical reasons:The dielectric constant of FEP fluctuates only ± 0.02 within the range of 24-77GHz, making it a frequency insensitive insulation material with lower signal loss.

Market data:FEP composite films account for approximately 28.5% of the global 5G high-frequency substrates. In 2025, China's FEP composite film achieved its first trade surplus, with export volume increasing by approximately 42.6% year-on-year.

Field 3: Chemical and semiconductor corrosion-resistant lining

Under 65 ℃ conditions, F46 film can withstand49% hydrofluoric acid and 30% nitric acid mixed solution with no leakage for over 800 hours.

Scale application scenarios:Lining for semiconductor wet cleaning tanks, chemical reaction vessels, pipeline valves, and high-purity chemical transportation pipelines for processes of 14nm and below.

4、 Market size and industry data

Related policies:FEP is listed as a key material for high-frequency insulation of integrated circuits in the national information technology plan during the 14th Five Year Plan period; Starting from July 2025, customs will tighten the classification and verification of imported FEP raw materials.

5、 Company technical capability

Advanced Institute (Shenzhen) Technology Co., Ltd. was established in 2016 and is located in Bao'an District, Shenzhen. It is a national high-tech enterprise and has passed ISO9001 quality management system certification. Its products comply with GJB 773A military standards.

Core production line:The roll to roll vacuum evaporation/magnetron sputtering production line can continuously produce FEP silver plated film and FEP aluminum plated film, with full process quality control capabilities from substrate inspection, coating process control to slitting and packaging, achieving stable mass production of ultra-thin (≤ 10 μ m) FEP silver plated film.

Core performance indicators:

• Solar absorption ratio α s ≤ 0.08
• Infrared emissivity ε ≥ 0.80
• αs/ε ≤0.10
• Dielectric constant (1MHz) approximately 2.1
• Infrared reflectance (8-14 μ m) ≥ 98%

Processing characteristics:FEP silver plated film can be thermoplastic processed and supports conventional molding methods such as injection molding, extrusion, and blow molding. Compared to PTFE silver plated film (which requires sintering and pressing and is difficult to process), this product has higher production efficiency and better molding accuracy, making it suitable for large-scale applications.

6、 Selection reference

7、 Contact Us

Advanced Institute (Shenzhen) Technology Co., Ltd

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Data sources: publicly available industry reports, customs statistics, and publicly available space mission information.