PTFE, PFA, FEP, PVDF Fluoroplastic products industry experts
Customer Witness
What are the common specifications and dimensions of electronic-grade PFA tubing, and what are its primary application areas?
I. What is an electronic-grade PFA tube?
Electronic-grade PFA (melt-processable polytetrafluoroethylene) is a specialty fluoroplastic tubing product that builds upon standard PFA by undergoing further purification and stringent process control. It retains PFA’s inherent advantages, including exceptional high-temperature resistance (-80°C to 260°C), superior resistance to strong acids and strong bases, and a low coefficient of friction. Moreover, through the use of ultra-high-purity resin grades—such as Chemours 451HP from the United States and Daikin AP-231SH—and manufacturing in Class 1,000/Class 100 cleanrooms, combined with precision internal-wall polishing to achieve a surface roughness of Ra ≤ 0.2 μm, it delivers exceptionally tight control over metal-ion leaching, keeping levels below 0.1 ppb.
II. Core Characteristics of Electronic-Grade PFA Tubing
Ultra-high purity: The raw material is an electronic-grade specialty resin, and ICP-MS analysis confirms extremely low leaching of metal ions such as sodium, potassium, iron, and copper, meeting industry standards such as SEMI F57 and SEMI F63.
Clean Surface: The inner wall is mirror-smooth, with a surface roughness of ≤0.2 μm, significantly reducing the risk of particle adhesion and preventing blockage of microfluidic channels or contamination of wafer surfaces.
Cleanroom manufacturing: Extrusion molding must be carried out in a Class 1,000 cleanroom or, for critical applications, a Class 100 cleanroom to prevent dust contamination.
Chemical inertness: Virtually no reaction with any wet electronic chemicals, making it suitable for the conveyance of highly reactive media such as hydrofluoric acid, nitric acid, hydrogen peroxide, and photoresist.
III. Common Specifications and Dimensions of Electronic-Grade PFA Tubing
Electronic-grade PFA tubing is typically supplied in the form of pipe or hose, with common specification examples as follows:
Imperial specifications (outer diameter × inner diameter, in inches)
1/8": approx. OD 3.2 mm × ID ~1.6 mm
1/4": approx. OD 6.35 mm × ID ~3.96 mm
3/8": approx. OD 9.53 mm × ID ~6.35 mm
1/2": approx. OD 12.7 mm × ID ~9.53 mm
3/4": approx. OD 19.05 mm × ID ~15.88 mm
1": Approx. OD 25.4 mm × ID ~22.2 mm
Metric specifications (outer diameter × inner diameter, mm)
2×1, 3×2, 4×2.5, 4×3, 6×4, 8×6, 10×7.5, 10×8, 12×10, 12×9, 12×8, 16×3, 19×16, 25×22, and so on.
Lengths are typically customizable, with common options including straight pipes or coiled tubing in 1 m, 3 m, and 6 m lengths.
IV. Main Application Scenarios of Electronic-Grade PFA Tubing
Semiconductor manufacturing: High-purity chemicals are used for processes such as lithography, etching, and cleaning; in particular, at the cutting edge of 5nm and 3nm process nodes, these chemicals serve as the “golden veins” that ensure chip yield.
Photovoltaics and new-energy batteries: withstand highly corrosive environments in polysilicon hydrogenation reactors and electrolyte delivery systems.
Biopharmaceuticals: Used for Water for Injection (WFI) and pharmaceutical fluid delivery; some products comply with USP Class VI and FDA certification and are compatible with gamma-ray sterilization.
High-precision analytical instruments: Serving as the sample introduction tubing for equipment such as mass spectrometers and liquid chromatographs to ensure accurate and reliable analytical results.
V. Selection Recommendations for Electronic-Grade PFA Tubing
Confirm the application grade: Semiconductor-grade products must meet SEMI standards, while pharmaceutical-grade products must comply with GMP.
Verification of Test Reports: Suppliers are required to provide ICP-MS reports for metal ion analysis, LPC particulate matter analysis, and FTIR purity analysis reports.
Focus on manufacturing processes: preferentially use fully automated extrusion production lines, ultra-pure water cleaning (≥18.2 MΩ·cm), nitrogen purging and drying, and double-layer clean packaging.
On-site Acceptance Testing: TOC Testing, Ion Chromatography Analysis, Bubble Point Integrity Testing
Domestic Substitution Trend: By 2025, the penetration rate of domestically produced PFA tubing (such as DanKai and SanfluLai) in the semiconductor sector will increase substantially, driven by the cost-effectiveness of local brands.
DANKAI is a nationally recognized High-Tech and Specialized, Sophisticated, and Novel enterprise. As an industry expert in PTFE, PFA, FEP, and PVDF fluoropolymer products, DANKAI is a full-service provider integrating R&D, manufacturing, sales, and customer support.
This article is originally written by the Teflon Tube Lady. Follow us to learn something new together!
Key words:
Previous Page
Dankai Technology
Address: Area B, 4th Floor, Building 1, North Yongfa Science and Technology Park, Yanchuan North, Chaoyang Road, Songgang Town, Bao'an District, Shenzhen, China
Tel: +86-755-29979617 23127719 23127819
E-mail: dkt@szdankai.com
Focus on us
Copyright©2024 All rights reserved of Shenzhen Dankai Technology Co., Ltd.
