Polyflon’s premier microwave substrate material is unique in the industry.

CuFlon features a pure PTFE dielectric that has been copper plated utilizing Polyflon’s proprietary process. The result is a substrate whose performance cannot be equaled by any other substrates available at this time. It has extremely low moisture absorption, is isotropic, and has uniform electrical properties over frequency and is an excellent solution for producing amplifiers and couplers.


CuFlon substrates are easily cut, sheared, and machined to shape. It is available with very thin copper coatings to 1/16 oz./ft.2 and dielectric thicknesses as low as 0.00025 in. (6 µm).