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 or rolls for EMI shielding, to create EMI gaskets or cable shielding sleeves. These can be punched and cut, and processed into various shapes, including wraps for cables (EMI cable shielding) that are susceptible to noise emissions.
Our Noise Suppression Sheets and tapes 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, lightweight and flexible, and easy to handle. They have a 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), 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 a 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. Use these to create EMI gaskets, EMI cable shielding, EMI shields, and EMI shielding tape.
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.
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 Noise Suppression Sheet
Thin 0.05 to 0.1mm flexible ferrite EMI suppressor sheets are thin flexible polymer sheets filled with soft metal flakes that suppress electromagnetic noise radiated from electronic devices. These offer the highest magnetic permeability of 185µ' at 3MHz and an applicable frequency range 100MHz to 6GHz. These are offered in standard roll widths of 210mm x 297mm and come in Halogen Free versions. These also come in Halogen Free versions. Use these EMI shielding materials to create EMI gaskets, EMI cable shielding, EMI shields, and EMI shielding tape.
| 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
High-frequency noise-suppressing thin flexible polymer sheets filled with soft metal flakes suppress electromagnetic noise radiated from electronic devices. Permeability at 3MHz ranges from 20µ’ to 50µ’ and appliable frequency ranges 100MHz to 3GHz. Standard thicknesses of 0.05 to 0.1mm are offered in standard roll widths of 210mm x 297mm. These also come in Halogen Free versions. Use these EMI shielding materials to create EMI gaskets, EMI cable shielding, EMI shields, and EMI shielding tape.
| 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 are designed to enhance the communication distance of NFC systems and to improve the power transfer efficiency of wireless power charging systems. Permeability at 13.56MHz ranges from 25µ’ to 55 µ’ with a thickness of 0.1 to 1.0mm. Standard rolls are 210mm wide with lengths up to 15 meters.
| 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 | |
Typical applications for RF Induction Sheets are used to increase the communication distance of NFC systems (near-field communication) or to enhance the 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 applicable frequency range 100MHz to 6GHz. These are offered in standard roll widths of 210mm x 297mm and come in Halogen Free versions.
| 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).
Made specifically for data cables, these high-frequency noise-suppressing thin flexible polymer rolls are filled with soft metal flakes to suppress electromagnetic noise radiated from electronic devices. Permeability at 3MHz is 100µ’ and applicable frequency ranges 100MHz to 1GHz. Standard thicknesses of 0.053 mm and are offered in standard rolls 50 meters long and 30mm wide. These meet RoHS directive for Halogen-free materials.
| Type | Cable Wrap |
|---|---|
| Grade | NS-JC |
| RoHS | Compliant |
| Permeability (μ’, @3MHz) | 100 ± 20 |
| Operating Temperature | -40 to 110 ℃ |
| Thickness | 55 µm ± 10 |
| Standard Size | 30mm x 50 meters |
Our EMI cable shielding material effectively solves various EMI noise problems. These EMI shielding materials consists of three layers: a 7 µm metallic layer, a 13 µm insulation layer, and a 35 µm magnetic layer. Our cable wrap absorber is specifically designed to enhance EMI performance for high-speed charging and data cables such as USB cables, HDMI cables, and SSD cables.
These effectively create a cable shielding sleeve absorber providing superior EMI suppression, ensuring optimal separation between power and signal lines. It offers a more compact and lightweight alternative to traditional ferrite beads, resulting in reduced volume and weight. With a maximum length of 1,000 meters, this material is ideal for continuous cable process production.
This EMI cable shielding material provides excellent electrical insulation while being environmentally friendly, as it is a halogen-free product.
