EMI Shielding Film for High-Speed FPCs
(High Bending Durability)

WILMINA®
SF-FT®8905 -C

UL 94 VTM-0 (when combined with Kapton® 50H)
* Kapton® is a registered trademark of an affiliate of Qnity Electronics, Inc.

Product Overview

This shielding film provides high shielding performance even in high-frequency applications while offering improved bending durability. With the growing adoption of foldable smartphones, demand is increasing for shielding films that maintain high shielding performance while withstanding repeated flexing. This product meets these needs and is also well suited to wearable devices, where bending durability is increasingly important.

Features

Excellent bending durability

SF-FT8905 -C demonstrates excellent durability in the MIT folding test (More than 25,000 folding cycles: R 0.38 mm / ±135°)
High shielding performance

SF-FT8905 -C provides high shielding performance across high-frequency ranges (70 dB or higher at 1 GHz)

EMI Shielding Film for High-Speed FPCs<br> (High Bending Durability)

Main specifications

Item		SF-FT®8905 -C
Transfer film thickness		57 µm
Product thickness (after pressing)		10 µm
Structure thickness (after pressing)	Protection layer thickness	5 µm
	Shielding layer thickness	0.3 µm
	Isotropic conductive adhesive layer thickness	5 µm
Adhesion strength	Adherend: Polyimide	3.0 N/cm or more
Shelf life (refrigerated)		6 months

Examples of Use

Suitable for applications requiring repeated bending

Reference data

Electric near-field shielding effectiveness
(KEC method)
Magnetic near-field shielding effectiveness
(KEC method)
MIT folding test results
Test conditions
- ・Folding clamp radius: 0.38 mm
- ・Folding angle: ±135°
- ・Folding speed: 175 cpm
- ・Load: 500 gf
- ・Failure detection: Electrical continuity is monitored to detect breaks in the shielding film.