Original NEC TOKIN High Performance

NEC TOKIN’s Flex Suppressor exhibits dramatic effectiveness in eliminating high-frequency noise. Flex Suppressor is a special magnetic material processed into sheets that, when simply affixed to the noise source or the path by which noise is transmitted, is capable of suppressing noise in a range from the 10 megahertz to 5 gigahertz band.
Furthermore, all that is required to produce the effect is to apply the Flex Suppressor. Even after all other means to correct the problem have been attempted, the Flex Suppressor will suppress the remaining noise in a short period of time and with extreme ease and without the need for design changes.
Without Flex Suppressor, the noise generated inside electronic equipment works in a self-destructive fashion, resulting in a reduction in performance. Flex Suppressor really works like a patch with magical powers.

 

NEC TOKIN’s Flex Suppressor has a thickness of 0.025 to 1.0 mm. Together with its various applications, our Flex Suppressor lineup increased to 11 specifications. The latest lineup includes FK2 and EFR. The FK2 lineup has a μ=100, the world’s highest level of permeability, a standard for evaluating magnetic absorption. This value is around 5 times our original Flex Suppressor which went to market. The noise eliminating effect of the Flex Suppressor is proportional quantitatively to Volume × Permeability, and FK2 possesses this high permeability, thus it is expected to have an equivalent effect at around 1/5 the thickness of our original product. This is an advantage only NEC TOKIN has, with its deep understanding of the operating principles of the Flex Suppressor that has a performance no other similar product from other companies possesses.
Given the problems associated with using environmental load substances for electrical component materials, EFR is being commercialized without using halogen, in consideration of environment issues. EFR has the same μ-60 magnetic permeability as the existing “R4N”product, and obtains high flame retardancy UL94 V-0. The flame retardancy level is the highest in the industry among halogen-free type products.
For use in severely hot environments such as in high-speed operation LSI’s and automotive applications, we have the TS7 with heat-resistant specifications at a heat resistance up to 105°C, the low frequency compatible R4N, the thermal conductivity enhanced HF2 for both heat releasing and noise suppression, the ultra-thin E50 and E25 products, we created a conductive layer between the Flex Suppressor resulting in the multilayer type 3GF that also has a shielding effect and the ultra-thin 3GT and 2GT multilayer types.

Special Composition Removes Noise

Just how is this amazing noise-reducing achieved merely by applying Flex-Suppressor?
Noise is radiated from certain locations prone to leakage when unnecessary high-frequency electric current is generated in a circuit. Meanwhile, Flex-Suppressor provides resistive impedance to circuits generating high-frequency current, which acts to reduce the current itself.
To eliminate noise, the source of the noise (i.e., the high-frequency current) is removed through resistive impedance due to magnetic loss that appears only at high frequencies, and the current is then converted to heat.

Here is an explanation likening the generation of high-frequency noise to sound waves.
When a megaphone is used to amplify the human voice, the sound is louder and carries farther than usual. The reason for this can be described in terms of the difference in impedance in sound waves occurring between the mouth and the outer environment. Here, impedance refers to a type of resistance expressing the relative degree of difficulty with which vibrations are propagated; the greater the impedance, the more difficult it is for the waves to travel, and the lower the impedance, the easier such propagation becomes.

Sonic vibrations are generated by the vocal cords and travel up to the mouth through relatively high impedance, but then suddenly hit the lower-impedance outer environment.
In other words, the boundary between the mouth and the outer environment acts as a barrier to the sound coming from the vocal cords, and a portion of the sound ends up being reflected back in the direction from which it came. This is the reason our voices are not ordinarily very loud.
In contrast, when a megaphone is put to a person's mouth, the change in impedance from the interior of the mouth to the outer environment is smoother, eliminating the back-reflections when the sound reaches the outside, thus allowing the voice to exit at its basic high volume.

Similar phenomena often occur within electronic circuits. That is, at points within circuits where extreme differences in impedance occur, the current is reflected at the boundary, thus creating reverse current. When this happens, a high-frequency standing wave is created at that point, and the wave then becomes a source generating noise.
To eliminate the noise, then, the reflected current causing the standing wave should be eliminated and the reflected wave absorbed.

Attaching Flex-Suppressor to the portion where the impedance suddenly changes makes that change more gradual, thus suppressing the formation of the standing wave. The result is a lessening of the reflected current, reduction of standing waves, and removal of noise. This is one of Flex-Suppressor's noise suppression effects.