Shielding a flex circuit can be accomplished through multiple methods. Shields are designed and used for EMI and ESD considerations as well as impedance requirements.

PFC recommends 4 types of shielding:

  • Copper clad
  • Copper cross hatch
  • Silver paste/epoxy
  • EMI Thermoplastic shielding film

Copper has the best shielding characteristics. Silver allows more flexibility and at a slightly lower cost. Shielding film is most flexible but a higher cost solution.

Flexibility

  • Semi-flexible
  • Flexible
  • Flexible
  • Most flexible

Example of conductor ink (silver) shielding

Conductor ink shielding example

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