EMI Suppression at Surface Steps
EMI Shielding Films for Rigid-Flex PCBs (High Step Conformability)

As electronic devices become smaller and more sophisticated, rigid-flex printed circuit boards (PCBs) are increasingly used in applications such as camera modules and automotive electronics. These boards have significant surface steps at the boundaries between rigid and flexible sections, requiring EMI shielding films with excellent step conformability.

TATSUTA’s WILMINA® SF-PC®6000-U1N2 and SF-PC®6000-U1-US are designed to conform to surface steps up to 400 µm. Unlike conventional shielding films that use a separate metal shielding layer, these products use an isotropic conductive adhesive that also provides the shielding function. This structure offers excellent step conformability while maintaining shielding effectiveness comparable to standard products such as SF-PC®5600-C.

SF-PC®6000-U1-US also offers resistance to chemicals used in ultrasonic cleaning processes, making it suitable for applications such as camera modules that require ultrasonic cleaning. Resistance is not guaranteed for all cleaning solutions.