Shielded FFC Cable – Aluminum Shield provides EMI/RFI protection. These cables are generally available in all pitches from 0.5 mm and higher, in almost any length and number of conductors. While it is recommended a shield that is grounded 360 degrees, externally on both ends to achieve maximum shielding effectiveness, you can design cables with floating grounds and internally grounded shields for simple connections to ground.
Testing has been conducted to determine the comparative shielding effectiveness of aluminum foil shield and a typical silver spray on shield. The testing also evaluated several grounding methods for effectiveness as well. The results confirmed that aluminum shielding provides a significant advantage in shielding effectiveness over all the frequency ranges tested. In addition to the improved shielding effectiveness, these aluminum shielded cables also have a solid layer of polyester over the aluminum to prevent unwanted shorts to chassis that are typical of silver spray shielded products with dielectric coatings. Shielded FFC cables are also very thin and flexible, which allows optimal routing of cables and minimal stress onto joints in applications such as touchscreens. This combination of benefits makes aluminum shielded FFC cable a superior choice for almost any shielding application.
Phil Heft – FFC Specialist; email@example.com