Copper flex membrane switches offer ideal solutions for devices with complex circuit patterns and very limited real estate, while retaining a low profile.Copper Flex Circuit

Copper flex switches are manufactured by laminating a thin sheet of copper to a flexible film substrate.  The copper is then chemically etched away, leaving only copper traces. This etching process is not as environmentally friendly and more expensive than screen printing silver traces.

Copper flex circuit options include:

  • Single- & double-sided
  • Polyimide or polyester
  • Tin, nickel, gold plating
  • Tighter trace pattern capabilities
  • Soldered components

Comparison Chart


Silver Ink


Printing vs. Etching Conductive silver ink traces are screen printed onto the film substrate. A sheet of copper is chemically etched away, leaving conductive traces. More expensive than screen printing.
Pliability/Weight Silver traces are lightweight and more flexible than solid copper traces. Solid copper traces are heavier and more durable than softer printed silver traces.
Conductivity Resistivity approx 50 mOhms/sq
1mm x 80 mm trace = 4 Ohms
0.5mm x 80mm trace = 8 Ohms
Lower electrical resistance and higher conductivity.
Price Low to Moderate Expensive to very expensive
Soldering No. Components are attached with conductive adhesive. Ability to solder active and passive components into the switch design.
Pitch Minimum of 1.0mm Possible pitch 0.5mm and 0.3mm for ZIF connector

Share This

Share this post with your friends!