Ready for the next generation of wireless charging?

May 30, 2018

It’s Time to Cut the Charging Cord.

Have you ever roamed through the airport looking for a power outlet to charge your dying mobile phone, only to find a line of people waiting to use the only available outlet? Or sat anxiously at a table in your favorite café while your expensive new smart phone is plugged in out of sight across the room?

We may live in a wireless world where huge amounts of data stream across the airwaves, but the computers, tablets, and phones we rely on are still, for the most part, tethered to power cords. Of course, batteries give us a certain amount of freedom. but sooner or later we all have to look for the familiar face of a power outlet.

The “Magic” of Wireless Charging Technology

Thanks to the promise of wireless charging, the days of hunting for an outlet will soon be over. Wireless charging – or inductive charging – is a technology that uses a charging station to create an alternating magnetic field. Any device nearby with the proper induction coil can receive energy from that field, allowing the device to receive power without a physical connection.

Although common household devices like cordless toothbrushes have used inductive charging for years, this technology has struggled with mass adoption – until now. Thanks to recent technological advances and a new wireless changing standard that can power phones up to 2.5 times faster, we are closer than ever to the convenience of cord-free charging.

White smartphone charging on a charging pad.
White smartphone charging on a charging pad.

© Daniel Jedzura

How Does Wireless Charging Work?

Wireless charging uses an electromagnetic induction to transfer energy from a charging base to an electronic device to charge batteries or run the device. Electromagnetic induction relies on copper coils as transmitter/receiver and ferrite sheets to manage the magnetic flux. A ferrite sheet has high magnetic conductivity during high-frequency transmission, and can shield signal interference from other electronic devices. However, the structure of ferrite sheets is quite fragile. Because it easily cracks during die-cutting and lamination process, a single-sided tape needs to be laminated on top for protection.


Adhesive Solutions for Wireless Charging

tesa’s 673xx series of matte black PI covering tapes are an excellent solution for ferrite sheet and graphite sheet protection applications. As one of our most advanced covering tapes, 673xx series brings solvent resistance, as well as a number of benefits to ferrite sheet and graphite sheet protection applications. Matte black surface with extremely low gloss level can compensate for the uneven surface of a ferrite sheet, while anti-fingerprint properties guarantee a consistently good optical performance throughout the production process. In addition, the outstanding mechanical properties of PI ensure good puncture resistance of 673xx series to further protect ferrite sheets and graphite sheets from being torn by other components.

To learn more about how we’re supporting global electronics manufactures with advanced technical adhesive solutions, please visit