Fotofab manufactures RFI and EMI shielding, 5-sided and multichannel enclosures, for attenuating components ranging in operating (and harmonic) frequencies from a few hertz to over 50 GHz.
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The type of metal specified may have an impact on an RFI and EMI shield's performance. In general, shielding against frequencies of 15 MHz or lower is a bulk material effect, and can best be served by employing a ferromagnetic metal such as Steel.
For greater attenuation at these lower frequencies, metals with high permeability and low core losses such as Permalloy 80® or MuMetal® are good candidates.
If the frequencies you are shielding against are greater than 15 MHz, RFI and EMI shielding become less of a bulk material effect and more of a skin (conductivity) effect. At frequencies (and harmonics) of 900 MHz and above, almost any metal including Brass, Nickel Silver, Copper, and Steel, shields similarly assuming a thickness of .002' (.05 mm) or greater.
Consider specifying a metal alloy called Nickel Silver (55% Copper; 27% Zinc; 18% Nickel; and not a speck of Silver) for RFI shields and EMI shields that are hand soldered or re-flow soldered with flux. In these two soldering environments, Nickel Silver is inherently solderable without any tin or tin/lead post-plating.
Plating like bright tin or tin/lead should be considered with any soldering processes that do not utilize an active solder fluxing agent.
While Fotofab is capable of making RFI and EMI shields in metal thickness from 0.001' (0.025 mm) to 0.060' (1.5 mm), the most common metal thicknesses we stock, which offer good shielding and adequate mechanical strength, are 0.006' (0.15 mm), 0.008' (0.2 mm), 0.010' (0.25 mm), 0.012' (0.3 mm), 0.015' (0.38 mm), and 0.020' (0.5 mm).
There are many RFI producers and RFI-sensitive products in the average household. However, RFI is a problem because the frequency range interferes with the functions of nearby equipment and devices. As an example, radio signals can be blocked in military initiatives by RFI. As a result, these signals can compromise entire missions.
Almost every electronic device can produce RFI, but the most common producers of RFI are motors, relays, processors, computers, industrial controllers, and high-tech medical devices. Electronic shielding gasket are capable of protecting against RFI. In addition, many shielding gaskets are designed to provide complete shielding from radio frequency interference.
These shielding products are available in many shapes, sizes, mounts, materials, and seal types. Protecting modern electronic equipment from radio frequency interference with RFI shielding is very important to improve effectiveness. This is achieved by the simple addition of a shielding gasket. There are many custom-shielding gaskets on the market.
The different types of RFI Shielding include:
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Metalized Conductive Foam gaskets include nickel-copper plated polyurethane foam sandwiched between the electrically conductive polyester fabric. The metalized conductive foam core performs better at higher frequencies than conventional perimeter-conductive products, mostly at higher frequencies.
These sheets are manufactured by thin, highly porous sintered ferrite with PET film and adhesive tape. Magnetic shielding materials are mostly used for near-field communication, radio frequency identification, and wireless charging applications. They are manufactured in standard ferrite layer thickness sheets and gaskets cut to the requirements.
Spring finger contact strips are manufactured in stainless steel or beryllium copper. They come in standard coils or lengths and are used for frequent access door seals. They are also used on lids ranging from small hand-held devices to room-sized enclosures.
RFI Absorbers WAM is made from magnetic particles in a polymer resin for producing a composite absorber material. They are manufactured in sheet form or cut gaskets. They reduce RFI noise within enclosures by attaching to flexible connectors, cables, or positioning near LCD.
Board-level shields are manufactured as one-piece and two-piece surface mount shields. They minimize crosstalk, provide isolation of board-level components, and they reduce susceptibility without impacting system speed.
Conductive silicone elastomer is made from a range of fillers in a silicone elastomer. They are manufactured in sheet form and custom die-cut shapes, gaskets, O-rings, etc.
Conductive fabrics are coated fabrics wrapped over a soft sponge core (the foam gasket). They provide excellent conductivity as well as efficient shielding. They are supplied in the form of custom gaskets or shaped profile strips. They are used on panels, doors, chassis, and enclosures.
Conductive Cloth offers good conductivity and a shielding effect. In addition, they provide high friction, abrasion resistance, and good metal binding.
Almost every industry that uses or produces electronic devices prone to electromagnetic interference can utilize RFI shielding. These industries have direct interests in reducing interference from external signals. These interfering signals have potential complications that range from the low-quality audio transmission to the complete failure of a rail control system. Many industries rely on RFI shielding, including:
RFI shielding tapes can:
To ensure the most positive outcome when purchasing RFI shielding from a RFI shielding supplier, it is important to compare several companies using our directory of RFI shielding suppliers. Each RFI shielding company has a business profile page highlighting their areas of experience and capabilities, along with a contact form to directly communicate with the supplier for more information or request a quote. Review each RFI shielding business website using our patented website previewer to quickly learn what each company specializes in. Then, use our simple RFQ form to contact multiple FRI shielding companies with the same form.
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