Conformity Magazine - March 2008 - (Page 45)

provide an elegant, versatile and assembly-friendly solution. They can be used to provide housings for printed circuit board assemblies, and allow for value-added details such as internal compartments and integrated mechanical fasteners. With their ability to provide an economic solution for many high volume appliance applications, conductive plastics negate the need for secondary operations, reduce weight, and can cut costs by up to 50% compared to die castings, formed metal, machined extrusions and plated plastic parts. As an example, Chomerics PREMIER™ plastic shielding materials use a blend of polycarbonate and ABS engineered for stable electrical, mechanical and physical performance. Using a proprietary process the base material is filled with long fibers of nickel plated carbon; the process ensures dense dispersion, random orientation and full engagement of the fibers to yield optimum shielding performance. Adhesives, Inks and Coatings These materials do not generally lend themselves to high volume production unless an automated application process is used to speed throughput and improve repeatability. There are numerous conductive adhesives available, and are typically used to bond other conductive materials such as EMI vents, windows, mesh gaskets, or for filling cracks and seams. Conductive coatings and inks provide EMI shielding, antistatic protection, corona shielding, and surface grounding in a wide range of applications. They can be applied to plastic surfaces by painting or for higher volumes, by using conventional spraying equipment. Conductive Windows Any barrier placed between an emitter and a susceptor that diminishes field strength of the interference is an EMI shield. Shielding requirements for display windows can vary from moderate to severe. In most applications, shielding effectiveness below 20dB is considered marginal due to long-term environmental effects on the mating surfaces of Together, we can specify an effective EMI shielding solution for your application. Whether you’re shielding an entire cabinet or a handheld device, Chomerics has the right EMI solution for your application. When you need shielding for telecommunications, avionics, information systems, automotive, consumer, industrial or medical electronics – Chomerics has you covered. Chomerics EMI shielding products include: and compounds manufacturer of EMI shielding solutions – www.chomerics.com 781.939.4850 chomailbox@parker.com Figure 5: EMI shielded window marCh 2008 Conformity 5 http://www.chomerics.com http://www.chomerics.com

Table of Contents Feed for the Digital Edition of Conformity Magazine - March 2008

Conformity Magazine - March 2008 NewsBreaks Editor's Note Adelstein Renominated to the FCC Industry Canada Publishes FAQs On RF Fields FDA Gives Its Scientific Capabilities Poor Marks FDA Offers Guidance On its Product Review Process FDA Publishes Updates to List of Recognized Standards FDA Warns of Patient Risk From Electric Dental Handpieces Complying with the EMC Directive, Second Edition ESD Open Forum Emerging Issues in Standards - Korean "RoHS": Not Like RoHS at All The iNARTE Informer Challenges in Testing - Field-Induced Charged Device Model: What Really Happens Design Fundamentals - EMI Shielding Technologies for Consumer Electronics Equipment Focus On...Compliance Software Buyer's Guide Additional Standards Published for the EU's ATEX Directive Additional Standards for the EU's Medical Devices Directive Also Published China to Require Bar Codes to Enhance Product Safety CPSC Releases 2007 Self-Assessment CPSC Actions in News IEC Standards Update UL Standards Update Product Reviews Telcordia Standards Update From Our "You Can't Make This Stuff Up" Department Looking Back: Items from Past Issues of Conformity Advertisers

Conformity Magazine - March 2008

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