Teflon™ AF Products Case Study: Superconductor Films

Effective Circuit Protection. Improved Dielectrics. Easy Application

Unlike conventional niobium superconductors, superconductor films function at temperatures readily achieved by cooling with liquid nitrogen or mechanical refrigeration. Teflon™ AF solutions protect these films based on metal oxides using a 2-mm application of passivation coating.


Sapphire wafer with superconductive film made with Teflon™ AF solution. This wafer functions as the front end of a two-channel microwave receiver.

Benefits of Using Teflon™ AF Solutions

Teflon™ AF products provide a unique combination of superior properties that are needed in demanding, high-performance applications. The unique structure and properties of Teflon AF enable its use in superconductor films and other applications. These properties offer:

  • Effective protection against atmospheric acids and better adhesion than typical polyimide passivation coatings
  • Durability by adding good resistance to boiling water
  • Easy application via conventional spin coating techniques to a controlled thickness down to one micrometer (μm)
  • Higher electrical performance by increasing velocity of propagation and reducing cross talk in superconductor-based devices because of its low dielectric constant (1.89 to 1.93)
  • Selective solubility in perfluorinated solvents
  • Optical clarity and transmission from the deep UV range into the IR range

Looking at the Past and Toward the Future

The History of Teflon™
Discovered in 1938, Teflon™ continues to evolve and drive innovation. Learn more.

Teflon™ Reimagined
It’s time to re-think what’s possible with Teflon™ products. Learn more.

Teflon™ is a trademark of The Chemours Company FC, LLC. The Teflon™ brand name is licensed by Chemours in association with approved applications. Without a trademark license, customers may not identify their product with the Teflon™ brand name. Unlicensed customers may refer to the Chemours product offering with only the Chemours product code number and product identifier name or descriptor as Chemours sells its product offerings. There are no fair use rights to use the Teflon™ trademark by buying from Chemours, a Chemours customer or a distributor without a trademark license from Chemours. If you are interested in applying for our Teflon™ brand trademark licensing agreement contact Chemours.