Nanocrystalline Ferrite Noise Suppression Sheets

About Noise Suppression Sheet Materials

The need for more compact and multi-functional electronic devices requires a large number of electronic components to be mounted on PCBs (Printed Circuit Boards) with extremely high density. The emitted noise by the ICs and cables is becoming increasingly important. During product design it is difficult to estimate emissions requiring noise suppression. A solution that is easly implemented is to use flexible noise suppression sheets which can be punch and cut, and processed into various shapes including high permeability nanocrystalline tapes for locations which are susceptible to noise emissions.

Our Noise Suppression Sheets and tapes materials area available for low frequency Magnetic 50Hz to 100kHz noise to EMI noise in the 100MHz to 6GHz range. These are flexible sheets, tapes and films which depending on the frequency range of noise suppression needed are composed of different materials and constructions.

Technologies Available

• Ultra-thin 18µm nanocrystalline ribbon between layers of PET film.
• Sheets of Nanocrystalline power and resin.
• Flexible polymer blended with micron-sized magnetic powder
• Polymer sheets filled with soft magnetic materials.

Nanocrystalline Magnetic Shielding

This is a series of thin and flexible magnetic shielding sheets made of high permeability nanocrystalline ribbon laminated with PET films to form Nanocrystalline Magnetic Shielding. The sheets are thin, light weight and flexible, and easy to handle and have superior magnetic shielding effect especially in frequencies below several 100kHz.

One layer can shield about 100µT and multiple layers can shield strong magnetic fields. Bending, cutting and punching has only a small deterioration in shielding effect. This allows the material to be applied on curved surface and cut or punched in various shapes. Long sheets are suitable for large-scale magnetic shield such in a shielding room.

Construction

Specifications

Shielding Effect of Magnetic Field at 50Hz

Thickness of grain-oriented Si (Silicon) steel in the above chart corresponds to one layer of M6 or approximately three layers of M4. For toroidal transformers magnetic shielding is applied to the OD of the transformer. When Si (silicon) steel is used it is the same as the transformer core material. M6 which is 0.35 mm thick or M4 which is 0.27 mm thick (3 layers are applied) which equals 0.81mm approximating 0.7mm in the above chart.

Shielding effect of DC magnetic field

Applications

Nanocrystalline Magnetic Shielding has an extremely good weight to noise suppression ratio making it an excellent choice to mitigate the magnetic noise generated from inductors in electronic devices which are easily affected by magnetic fields or fluctuating magnetic fields. It is also used for magnetic shielding of buildings adjacent to power lines or power distribution installations.

Nanocrystalline EMI Suppressor Sheet

Halogen-free noise suppression sheet with flame retardance composed of high performance nanocrystalline soft magnetic material. The nanocrystalline material is powered and bonded together with resin and formed into sheets. These sheets have high suppression effect on radiation noise and feature excellent complex relative permeability resulting in high suppression of radiation noise in the range from 0.1 to 10 GHz.

Sheets are flexible and easy to handle, punch and cut in various shapes. They can even be applied to curved surfaces.

Applications

Highly effective in suppression of radiation noise and cross-talk noise in multilayered circuit boards in various electronic devices, flexible flat cables or on the internal or external surface of a chassis containing digital devices.

This is demo text

Specifications

Ferrite EMI Suppressor Sheet

Thin 0.05 to 0.1mm flexible ferrite EMI suppressor sheets are polymer sheets filled with soft magnetic materials which offer the highest magnetic permeability of 185µ' at 3MHz and appliable frequency range 100MHz to 6GHz. These are offered in standard roll widths of 210mm x 297mm and come in Halogen Free versions.

Ferrite EMI Suppressor Film

Our heat-conducting films are made using a casting process, which produce a smooth finish facilitating component mounting due to their self-adhesive properties. Not using adhesives in the assembly process allows for easier and cleaner component replacement; all that is required is the replacement of the thermal interface pad and, issues with adhesive shelf life are eliminated.

RF Induction Sheet

A series of flexible soft magnetic materials which are designed to enhance communication distance of NFC systems and to improve power transfer efficiency of wireless power charging systems. Permeability at 13.56MHz ranges from 25µ’ to 55 µ’ with thickness of 0.1 to 1.0mm. Standard rolls are 210mm wide with lengths up to 15 meters.

Typical applications for RF Induction Sheets are to increase communication distance of NFC systems (near field communication) or to enhance power transfer efficiency of WPCs (wireless power chargers).

Microwave Absorber

Thin 0.05 to 0.1mm flexible ferrite EMI suppressor sheets are polymer sheets filled with soft magnetic materials which offer the highest magnetic permeability of 185µ' at 3MHz and appliable frequency range 100MHz to 6GHz. These are offered in standard roll widths of 210mm x 297mm and come in Halogen Free versions.

These can be used for Electronic Toll Collection to improve ETC communication environments (5.8 GHz), reduce RCS of military vessels (8-12 GHz) or for Collaboration Detection and Prevention Systems to reduce internal (cavity) resonance by isolate antennas from ground plane reflections (24, 77 GHz).