Conductively Plated Wire Mesh Shields Displays and Enclosures

The new EMIGuard™ Series from Dontech, Inc. is a conductively plated, optical fine wire mesh for EMI/RFI shielding of electronic displays and enclosures. It is manufactured in 304 stainless steel, copper, and aluminum alloys. Meshes are available from 50 to 250 openings per inch (opi) in standard sheet sizes of 22 x 28 inches or precut to a specific size. In a proprietary manufacturing process, the mesh wires are encapsulated in a conductive silver and black alloy plating to maximize transmittance, shielding, and environmental durability. EMIGuard™ applications include EMI/RFI shielding for electronics used in medical, avionic, telecommunications, military, and industrial applications. Dontech is an ISO-9001 certified; find more product information on the company website.

Electrically Conductive Epoxy Features Low Volume Resistivity

Polymer System EP21TDCSFL from Master Bond is a two-component, silver filled, electrically conductive system for bonding and sealing formulated to cure at room temperature or more rapidly at elevated temperatures. This epoxy is characterized by its high flexibility and elongation. It has a one-to-one mix ratio, by weight or volume. It readily develops a high bonding strength of 1,500 psi tensile shear and a T-peel of greater than pli when cured and measured at 75 degrees F. The volume resistivity of the cured system is very low—less than 10^-3 ohm-cn. High flexibility and low shrinkage mean that little mechanical stress is exerted on sensitive components. EP21TDCSFL is well suited to use in the electronic, electrical, computer, and semiconductor industries. Find more product information at the Master Bond website.

EMI Shielding Windows Feature Transparent Conductive Coating

EMI Shielding Windows from Performance Coatings International are crafted to help equipment comply with international EMC specification standards and coatings while providing optimum contrast enhancements for all types of displays. They also reduce annoying glare and front-surface reflections. All EMI Shielding Windows are front-surface treated with Vuegard 901® to render them resistant to abrasion as well as many harsh chemicals and solvents. The vacuum-deposited conductive rear shielding is protected by a transparent EMI Transguard coating that prevents finger marking of the gold film and permits cleaning as required. It is the thin, transparent gold film on the rear layer that performs the EMI shielding function, primarily by reflecting incident radiated EM energy. The window passes the desired light within the visible spectrum while attenuating EMI at frequencies below it. Electrically, the shielding window presents a reflection barrier to EMI, reducing the equipment’s unwanted emissions or susceptibility. To locate additional product information, visit the Performance Coatings International website.

Conductive Foam Gaskets Boast X,Y, & Z Axis Conductivity to Maximize Shielding Effectiveness

The durable 2700 Series conductive foam from Tech-Etch has X, Y, and Z axis conductivity for maximum shielding effectiveness and is available as standard gaskets, custom designs, or sheet stock. The material is well suited to computer, router, and telecom I/O shielding. It is offered with or without pressure sensitive conducted adhesive covering the entire mounting surface or with non-conductive adhesive tape in spot application. Constructed from conductive open-cell polyurethane foam, it has nickel over copper-plated polyester fabric on two sides. The fabric is woven on one side and unwoven on the other. Standard thicknesses are .059, .087, and .134 inch. Conductive foam is both 94-V rated and RoHS compliant, and low compression set ensures durability. More product information, can be found on the Tech-Etch website.

EMI Form-in-Place Gasketing Is Corrosion Resistant

CHOFORM® 5550 from the Chomerics Division of Parket-Hannafin is a form-in-place corrosion resistant gasketing material. It is a one-component, thermal cure, electrically conductive material containing nickel-plated graphite particles dispersed in a silicone elastomer. The material has been formulated for increase flow rates for robotic dispensing onto metal castings. CHOFORM 550 gaskets provide superior shielding—i.e., above 80 dB from 1 to 10 GHz. They also demonstrate superior galvanic corrosion resistance and meet UL 94V-0 flammability requirements. For more information on this product, visit the Chomerics’ website.

EMI/RFI Shielding Spray for Electronic Enclosures

Super Shield Conductive Coating from MG Chemicals is a general purpose EMI/RFI shielding spray for use on plastic electronics enclosures. It consists of a tough, durable acrylic base pigmented with high purity nickel flake. A one to two mil coating provides 40 to 50 dB of shielding effectiveness across a frequency range of 5 to 1800 MHz. Super Shield’s surface resistance is approximately 0.7 ohm/sq. It has been tested per IEEE Standard 299-1997. Available in both aerosol and liquid forms, the latter is suitable for dipping, brushing, or spray gun application. Find more information at the MG Chemicals’ website.

Conductive Coatings for Windows Provides EMI/RFI Shielding and Anti-Static Properties

Coatings designated #969, #1258, and #1255 from Evaporated Coatings, Inc. (ECI) are films designed specifically for deposition onto plastic optics and windows. These films are typically used for EMI/RFI shielding or to achieve permanent anti-static properties. Coating #969 is used to shield against EMI/RFI. This vacuum deposited thin film exhibits excellent optical clarity and environmental stability. The coating is available in standards ranges from 5 ohms per square with 65 percent photopic transmission to 30 ohms per square with 75 percent photopic transmission. This film attenuates up to 40 dBs in the 10-kHz to 20-GHz frequency range. Electrical Coating #969 is well suited to any application in which electrical noise has the potential to leak into a device through a window thus disrupting its performance. Coating #1258 provides high visible transmission and permanent static control. Coating #1255 low reflection and dissipation of static buildup. For more information on these coatings, go to the ECI website.

Complete Line of Conductive Components Meets Military and Commercial Needs

ElectroSeal™ electrically conductive elastomers from Laird Technologies are well suited to both military and commercial applications that require both environmental sealing and EMI shielding. Compounds can be supplied in both molded and extruded shapes, sheet stock, custom extruded, or die cut shapes to meet a wide variety of applications. A wide choice of profiles ensures that conductive extrusions will meet a large range of applications. Other ElectroSeal™ benefits include a wide choice of conductive filler materials, shielding effectiveness up to 120 dB at 10 GHz, and the availability of custom dies for specific applications. The complete line of fabricated components includes O-rings, flat washers, molded D-rings, and flat waveguide gaskets. For additional product information, visit the Laird Technologies’ website.

Isolex Conductive Coatings Target Military and General Industrial Applications

The Isolex line of conductive coatings from Randolph Products offers a full line of EMI/RFI conductive coatings. Isolex R73 is a copper acrylic, functional, air dry lacquer crafted for EMI/RFI suppression in a variety of electronic plastic products. Isolex R73 produces excellent attenuation levels (87 dB at 30 MHz to 36 dB at 1000 MHz). At 2.0 mils of dry film thickness (DFT), it has a continuity reading of 0.1ohm/sq. or less. Isolex R65, a nickel acrylic, is also a functional, air dry lacquer crafted for EMI/RFI suppression in a variety of electronic plastic products. Its attenuation levels are 60 dB at 30 MHz to 75 dB at 1000 MHz. At 2.0 mils DFT it has a continuity reading of 0.5 ohm/sq or less. Isolex WB-120 is an effective EMI/RFI paint that can be used in applications in which it is necessary to reduce volatile organic compounds (VOC). Isolex WB (Waterborne)-120 contains only a fraction of the VOCs found in solvent based paints and is formulated to meet the most stringent regulations of federal and state regulations focused on minimizing emission sources. Additional product information is located on the Randolph Products’ website.

“Smart” Plastics Lines Target Bluetooth Applications

Families of thermoplastic compounds developed by the RTP Company have been crafted to meet the special needs of the widely-used Bluetooth™ wireless communications protocol. Compounds for Bluetooth™ feature modified electrical and dielectric properties that enhance signal transmission and reception. Specifically, this line of compounds deals with the three primary phenomena that occur when electromagnetic signals encounter an object—absorption, reflection, and transmission. Special compounds enhance signal transmission by providing low or high absorption, reflection, or dissipation characteristics. A special line of conductive EMI/RFI compounds works along with other compounds to provide over 100 dB of shielding. For more information on Compounds for Bluetooth™, go to the RTP Company website.

Conductive Elastomers Meet Requirements of MIL-DTL-83528

Series 110 Conductive Elastomers from East Coast Shielding are crafted using silicone or fluorosilicone binders with a conductive filler of silver-plated copper, silver-plated aluminum, silver-plated glass, or silver nickel graphite. A complete line of conductive elastomers meets the requirements of MIL-DTL-83528. These elastomers are intended for use in severe environments where maximum shielding effectiveness is needed—military and aerospace applications. They can be used for exacting commercial environments as well. For more information, go to the East Coast Shielding website.