TDK Flexield Noise Suppression Sheets

IFL Series Flexield Noise Suppression Sheets

TDK’s IFL series Flexield are thin, flexible magnetic sheets that are designed to suppress unwanted electromagnetic interference (EMI) on various types of electronic equipment. While traditional methods of dealing with EMI require mitigating common mode and differential mode noise electrically via the use of inductors, ferrite beads, common mode filters and capacitors, Flexield utilizes the material’s magnetic properties to absorb, attenuate or reflect unwanted EMI noise. Multiple high permeability materials and thicknesses are available to choose from within the IFL series depending on performance requirements and the application.

IFL series product consists of a surface film, a magnetic sheet layer formed from soft magnetic material and resin, a double-sided adhesive, and a release liner and is available in either sheet or roll form. The non-electrically conductive film can be attached directly to circuit components and the high flexibility of the product allows sheets to easily form to the desired shape. Applications for IFL series Flexield include but are not limited to: LED/LCD display address and data lines/traces/cables, stylus pens for improved sensitivity, sensor shielding and immunity, and digital audio and video lines.

IFM Series Hybrid Flexield Noise Suppression Sheets (Magnetic + Copper Layer)

TDK's IFM10M series noise suppression sheets consist of a magnetic layer and an ultra-thin copper-clad laminated layer enabling high magnetic permeability. The IFM10M sheets are 60% thinner than existing magnetic sheets and offer equivalent noise suppression performance over a broad frequency range of 500 kHz to 1 GHz. The copper layer is 1 µm thick resulting in the total thickness of the new Flexield product of just 0.04 mm.

The design of the ultra-thin copper-cladding is based on plating process technology developed by a third party. Thanks to this technology, the IFM10M sheets maintain a low profile and no longer require a layer of double-sided tape, making the sheets ideal for height restrictive applications, such as smartphones, tablets, notebooks, and stylus pens.

IFL Series Hybrid Flexield Noise Suppression Sheets (Magnetic + Conductive Layer)

TDK’s IFL series hybrid Flexield noise suppression sheets are thin, flexible magnetic sheets that are designed to suppress unwanted electromagnetic interference (EMI) on various types of electronic equipment. This hybrid type Flexield is constructed with both a magnetic and a conductive metal layer to provide attenuation at high EMI level conditions where the magnetic layer alone may not be sufficient. The magnetic layer provides attenuation via magnetic losses and noise magnetic flux absorption and the metal layer provides reflection (blocking) and Eddy current loses. Sheets are available with either a top insulation layer (“E” type) or a top conductive metal layer (“G” type) which can be grounded, helping to prevent the introduction of parasitic capacitance or inductance and improving noise suppression.

With a thickness of just 0.03 mm (including the insulating and conductive layers), the IFL series hybrid type Flexield is ultra-thin and perfect for applications where height is restricted, for example, sensitivity improvement in stylus pens and PCB, FPC, and ribbon cable data/address lines. It can also be cut or punched to the required size and shape depending on the application and is available in either roll or sheet form.

IFF Series Heat-resistant Flexield Noise Suppression Sheets

TDK’s IFF series heat-resistant Flexield noise suppression sheets are thin, flexible magnetic sheets with high permeability (µ’ typically 100 @ 10MHz) for improved electromagnetic interference (EMI) absorption. Sheets are available with thicknesses down to just 0.05 mm and the ultra-high surface resistivity allows for direct attachment to electrical components.

With a wide operating temperature range of -40°C to +125°C, IFF series Flexield can be used in solder reflow processes (up to 260°C max) and is ideal for use in applications such as high ambient temperature industrial equipment, non-critical automotive systems, and outdoor communication infrastructure equipment.

IFL / IBF Series Flexield Magnetic Sheets for Wireless Power Transfer & NFC / RFID

TDK’s IFL and IBF series Flexield low loss sheets are thin, flexible magnetic sheets that are designed to improve NFC/RFID antenna performance and for use in wireless power transfer systems. The high flexibility enables the sheets to adhere to many coil types & configurations, and the non-conductive surface allows the metal coils to be directly applied to the magnetic shield, reducing the impact of metal objects directly behind the coils. Multiple high permeability and low loss materials with thicknesses from 0.05 to 0.2 mm are available to optimize the coil’s Quality (Q) factor. IFL04 & IBF15 series sheets are ideal for improving antenna reception performance and sensitivity in RFID readers & writers, isolating the magnetic field in metal smart cards and tags, shielding for low power magnetic resonance wireless power transfer systems, and in NFC transmitters and receivers.