Ultra-thin noise suppression sheets feature high permeability

15th September 2015

Jordan Mulcare

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TDK Corporation presents the ultra-thin IFL16 noise suppression sheet. The sheet has a thickness of just 0.03 or 0.05 mm, depending on the type, making it 20% thinner than existing sheets with the same performance. At this thickness the new material offers the world's highest magnetic permeability of 220µ´ at 1MHz. IFL16 is designed for a temperature range of between -40 and +85°C and is suitable for the frequency range from 0.5 to 1,000MHz. The standard size of the sheet is 300x200mm. The sheet can also be supplied on a roll (300x100m). The sheet extends the existing TDK product spectrum of noise suppression sheets of types IFL10M and IFL12.

Development of smartphones and other mobile devices is still focused on the miniaturisation of the individual components, while the range of functions increases. Apart from a PCB layout that supports EMC, adequate additional shielding of the devices is playing an increasingly important role. Noise suppression sheets such as the ultra-thin IFL16 are a space-saving answer to this requirement. They can prevent emitted interference from penetrating the device or can prevent reflections created within the device from affecting the function of other devices.

A growing number of devices use a stylus pen for input, which works on the principle of magnetic induction. In order to improve sensitivity, these devices use magnetic films for the inductive sensor unit of the display. This simultaneously demands both a high level of magnetic permeability and a very thin film. On the basis of its substantial competence regarding materials and technology, TDK is offering attractive solutions for such applications with its IFL16 foil.