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 easily implemented is to use flexible noise suppression sheets, which can be punched and cut, and processed into various shapes, including high permeability nanocrystalline tapes for locations that are susceptible to noise emissions.
Our Noise Suppression Sheets and tape materials are 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. They 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 surfaces and cut or punched into various shapes. Rolls are suitable for large-scale magnetic shields such as in a shielding room.Construction
| Material | Thickness |
|---|---|
| PET film | 25 µm |
| Hot-melt adhesive | 25 µm |
| Nanocrystalline ribbon | 18 µm |
| Hot-melt adhesive | 25 µm |
| PET film | 25 µm |
| Total thickness | 0.12 mm |
Specifications
| Type | Rolls | Sheet |
|---|---|---|
| Length | up to 100 m | 610 mm |
| Width | 470 mm | 460 mm |
| Product code | F1AH0535 | F1AH0607 |
| P/N | MS-FR 470-100M-T0 | MS-F SD-460×610-T0 |
| Thickness | 0.12 mm | |
| Magnetic flux density,B800 DC H=800A/m | 1.23 T | |
| Maximum permeability, µmax (DC) | 70,000 | |
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 transformer magnetic shielding is applied to the OD of the transformer. When Si 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 Noise Suppression Sheets - For EMI
Halogen-free noise suppression sheet with flame retardance composed of high performance nanocrystalline soft magnetic material. The nanocrystalline material is powdered and bonded together with resin and formed into sheets. These Nanocrystalline Noise Suppression Sheetshave 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.
Nanocrystalline Noise Suppression Sheets are flexible and easy to handle, punch, and cut in various shapes. They can even be applied to curved surfaces.
Applications
Highly effective at suppressing radiation and cross-talk noise in multilayer circuit boards, various electronic devices, flexible flat cables, and digital device chassis.
Specifications
| Shape | A4 Sheet | Rolls | ||||
|---|---|---|---|---|---|---|
| Size (mm) | 210mm x 297mm | 300 mm x 20m | 330 mm x 20m | |||
| Thickness | 0.13 mm | 0.25 mm | 0.50 mm | 0.13 mm | 0.25 mm | 0.50 mm |
| Product code | F1AH0946 | F1AH0948 | F1AH0950 | F1AH0943 | F1AH0944 | F1AH0945 |
| P/N | K-EK013 210-297-T0 | K-EK025 210-297-T0 | K-EK050 210-297-T0 | K-EK013 300-20M-T0 | K-EK025 300-20M-T0 | K-EK050 300-20M-T0 |
| Density (103kg/m3) | 3.5 x 103kg/m3 | |||||
| Complex relative permeability (at 1GHz) µr'' | 8 | |||||
| Complex relative permeability (at 1GHz) µr'' | 12 | |||||
| Tensile strength (MPa) | 1.5 Mpa | |||||
| Surface resistivity | 1 X 109 Ωm | |||||
| Flame retardance | V-0 | |||||
| Operating temperature | V-40 to +85 ℃ | |||||
Ferrite EMI Suppressor Sheet
Thin, flexible ferrite EMI suppressor sheets (0.05 to 0.1mm) are polymer sheets filled with soft magnetic materials, providing a magnetic permeability of 185µ' at 3MHz and an applicable frequency range of 100MHz to 6GHz. Available in standard roll widths of 210mm x 297mm, they are also offered in halogen-free versions.
| Type | NS-HD | NS-H | NS-L | NS-B | NS-K | NS-J | NS-S | NS-G |
|---|---|---|---|---|---|---|---|---|
| Permeability ( at 3MHz) | 25 | 30 | 45 | 70 | 100 | 130 | 150 | 180 |
| Applicable Frequency | 500MHz ~ 6GHz | 300MHz ~ 6GHz | 100MHz ~ 6GHz | 100MHz ~ 6GHz | ||||
| Operating Temperature ℃ | -25 ~ +105 | |||||||
| Standard Thickness (mm) | 0.05 ~ 0.1 | |||||||
| Standard Size | 210mm x 297mm, roll type available | |||||||
| Volume Resistivity (Ω•cm) | 1 x 108 | |||||||
| Remarks | High Freq. Low Freq. | Low Freq | ||||||
| Halogen Free available. | ||||||||
Ferrite EMI Suppressor Film
Thin, flexible polymer sheets filled with soft magnetic materials for high-frequency noise suppression. With permeability ranging from 20µ' to 50µ' at 3MHz and an applicable frequency range of 100MHz to 3GHz, these sheets are available in standard thicknesses of 0.05 to 0.1mm and standard roll widths of 210mm x 297mm. Halogen-free versions are also available.
| Type | NS - F | NS - FA | NS - FAL | NS - FR |
|---|---|---|---|---|
| Permeability ( at 3MHz) | 20 | 20 | 50 | 50 |
| Applicable Frequency | 100MHz ~ 3GHz | |||
| Use Temp ℃ | -25 to +85 ℃ | |||
| Standard Thickness (mm) | 0.05 ~ 0.1 | |||
| Standard Size | 210mm x 297mm, roll type available | |||
| Volume Resistivity (Ω•cm) | 1 x 1012 | |||
| Remarks | o Thin type of high frequency noise. o Halogen Free available. | o Function of noise absorbing and shielding o Halogen Free available. | o Thin type of low frequency noise. o 1000mmx200M. | |
RF Induction Sheet
A series of flexible soft magnetic materials designed to extend NFC communication range and boost power transfer efficiency in wireless charging systems. Featuring permeability from 25µ' to 55µ' at 13.56MHz and thicknesses from 0.1 to 1.0mm, these materials come in standard rolls 210mm wide and up to 15 meters long.
| Type | Permeability at 13.56MHz | Thickness | Standard size | Frequency | |
|---|---|---|---|---|---|
| μ' | μ'' | (mm) | (mm) | ||
| RF-B | 55 | 1.0 to 1.5 | 0.1 to 0.5 | 210x297 | 13.56MHz |
| RRF-L | 45 | 1.5 to 2.0 | 0.2 to 1.0 | 210x297 | |
| RF-H | 45 | 1.0 to 1.5 | 0.2 to 1.0 | 210x15M | |
RF Induction Sheets are typically used to extend NFC (near field communication) range and enhance power transfer efficiency in wireless power chargers (WPCs).
Microwave Absorber
Microwave absorbers enhance ETC communication (5.8 GHz), reduce RCS of military vessels (8-12 GHz), and improve collaboration detection systems by minimizing internal resonance and isolating antennas from ground plane reflections (24, 77 GHz).
| Type | MA-C | MA-X | MA-K | MA-W |
|---|---|---|---|---|
| Frequency | 4-6GHz | 8-13GHz | 21-26GHz | 75-110GHz |
| Attenuation | -20dB | -20dB | -20dB | -5dB |
| Type | Resonant | Broadband | ||
| Operating Temperature | -50 to 150 ℃ | |||
| Thickness | 1.5 to 3.0 mm | |||
| Standard Size | 300x300 mm | |||
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 isolating antennas from ground plane reflections (24, 77 GHz).
