Custom EMI Shielding Solutions and Gasket Materials
The purpose of EMI shielding materials is to prevent electromagnetic interference (EMI) and radio frequency interference (RFI) from impacting sensitive electronics. Electromagnetic interference can cause minor disruptions or major malfunctions to electronic devices. Marian manufactures custom die-cut EMI gaskets, RFI gaskets, and other EMI shielding components to meet electromagnetic compatibility (EMC) specifications for electronic devices.
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EMI can cause significant setbacks to the launch of an electronic device, and the setbacks are often uncovered late in the process. Our global teams in the field are ready and available to help produce your EMI shielding components.
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EMI Materials
Marian converts a wide range of EMI materials such as copper and aluminum foils, metallized fabrics, conductive elastomers, conductive foams, and tapes/transfer adhesives. Based on the complexity of your application, Marian can also create a part with multiple layers of thin, conductive materials that achieves the appropriate EMI shielding and absorbing requirements. Learn more about EMI Materials below.
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EMI Gaskets, RFI Gaskets
To ensure electromagnetic compatibility (EMC), it is common in many device designs to completely encase the electronics in a conductive enclosure. EMI gaskets and RFI gaskets provide good electrical conductivity across the gasket/flange interface at the seam of the enclosure. The better the conformability and conductivity of the material, the higher the shielding effectiveness of the gaskets is generally.
Conductive Elastomers
Conductive Silicone Rubber
Marian manufactures custom EMI shielding gaskets out of conductive silicone rubber materials. Electrically conductive particle-filled silicone elastomers can be an excellent choice for an EMI gasket, particularly if the gasket is required to also provide an environmental seal to the enclosure.
Rogers BISCO® EC-2130
EC-2130 silicones are formulated to have a low durometer, creating the low compressive forces needed for challenging product designs. EC-2130 silicones are ideal for use in compact handheld electronics, communication devices, electronic enclosures, and laptop computers.
EMI Shielding for Every Industry, from Automotive to Aerospace
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Protecting Critical Electronics
Foil, Fabric, Foam EMI Tapes
Tapes are thin, flexible, and conformable to fit precisely around curves and tight edges. EMI tapes are laminated with a conductive pressure sensitive adhesive. They can be cut into any size or shape, and an added bonus is that they are very lightweight. Thin EMI foil, fabric, and foam tapes fit particularly well within small electronic devices.
There are a very wide range of EMI tapes available, many offering added features such as: static charge grounding, anti-static masking, cushioning, and mechanical protection. Most have excellent dimensional stability making them easy to die-cut.
EMI Foil Tapes
- Copper, aluminum, silver, and stainless steel
- Laminated with conductive PSA
- Multi-layer options laminated to fabric and foam for increased durability and gap filling
Fabric Tapes, Metalized Cloth
- Metalized woven, non-woven, and rip-stop fabrics
- Laminated with conductive PSA
- Multi-layer laminate options (including PET, polymer films and foil) that offer increased toughness and external electrical insulation.
EMI Foam Tapes
- Metal plated polyurethane, polyolefin, and silicone foams
- Fabric-over-foam gasket materials
- Durable and ideal for converting
- Laminated with conductive PSA, high conductivity in x, y, and z axes
Conductive Transfer Adhesives and Double Coated Tapes
Electrically conductive adhesive transfer tapes and double coated tapes are designed to be used in a variety of specialized electronics from attaching EMI shields and gaskets, to grounding and bonding. Conductive ATT and DCT can eliminate the need for screws and mechanical fasteners while allowing the use of lighter, more compact fabric and layered foil shielding materials. Compared to liquid adhesives and epoxies, ATT and DCT are easy-to-use pressure sensitive tapes that can be die-cut to any custom shape.
Why Choose Marian for EMI Shielding Materials?
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FAQs About Custom EMI Shielding Solutions
What is the main purpose of EMI shielding?
EMI shielding materials are designed to protect sensitive electronics by blocking electromagnetic and radio frequency interference (EMI/RFI). This interference can cause anything from minor signal disruptions to serious device malfunctions.
What types of EMI shielding materials do you offer?
Marian has the capability to convert EMI and RFI shielding materials such as copper and aluminum foils, metallized fabrics, conductive elastomers, conductive foams, and tapes or transfer adhesives into custom shapes or gaskets. Contact one of our sales engineers to learn more about our EMI solutions.
How do custom die-cut EMI gaskets improve performance?
By addressing EMI and RFI interference, EMI/RFI gaskets help prevent critical disruptions and malfunctions in application components. Custom die-cutting these gaskets ensures there are no gaps or overlaps in coverage, delivering full shielding and maximum protection, no matter the environment.
Can you help us meet required EMC specifications?
Absolutely! Many devices have specific benchmarks for electromagnetic compatibility (EMC). To meet these requirements, device designs commonly encase electronics in a conductive enclosure. EMI and RFI gaskets provide excellent electrical conductivity, increasing shielding effectiveness and helping meet EMC demands.
What is the difference between an EMI gasket and an RFI gasket?
EMI (Electromagnetic Interference) and RFI (Radio Frequency Interference) gaskets provide shielding solutions tailored to their respective frequency ranges. EMI materials are designed to protect against a broad spectrum of electromagnetic frequencies, from low frequencies to high frequencies. RFI materials specifically target the low radio frequency range, which is critical for the functionality of devices using Wi-Fi, Bluetooth, or GPS.
While both EMI and RFI gaskets often utilize the same materials, devices requiring RFI protection may require materials optimized for higher shielding effectiveness within the radio frequency range.