EMI Shielding Materials

SeleconGuides

A Global Leader in High Performance Materials

&ThermalManagementSoluons

Version No. 2022_V.A.0

JONES TECH

Industryapplicaons

PAGE OF CONTENTS

Introducon

EMIConducveElastomer

EMI Form-In-Place (FIP) Gasket

EMI Absorbing Material

EMI Fabric & Foam Gasket

Co-extrudedConducveRubberMaterial

ExtrudedConducveRubberMaterial

CoangConducveElastomerMaterial

Molded Products

Breathing Vent

Membrane Vent

Honeycomb Shielded Vent Panels

ConducveFabricGasket

ConducveFoam

EMI Accessory Components

Disclaimer

•TheinformaonprovidedinthisTechnicalDataSheet(TDS)includingtherecommendaonsforuseandapplicaonof

the product are based on our knowledge and experience of the product as at the issuing date of this TDS. When using our

products, no maerwhat type of equipmentthey might be used for, be sure to make a wrien agreement on the

speciﬁcaonswithusinadvance.ThedesignandspeciﬁcaonsinthisTDSaresubjecttochangewithoutpriornoce.

•DonotusetheproductsbeyondthespeciﬁcaonsdescribedinthisTDS.ThisTDSexplainsthetypicalperformanceof

theproductsasindividualcomponent.Beforeuse,checkandevaluatetheiroperaonswheninstalledinyourproducts.

•TheproductprovidedinthisTDScompliancewithHSF.

All parts listed in

this catalog are

leadfreeandRoHS

compliant.

INTRODUCTION

Electromagnec Compability (EMC) refers to a

device/equipmentorsystemperformance,itcanmakeits

ownworkenvironmentandthisenvironmentwithoutany

otherdevicetoproducestrongelectromagnecinterfer-

ence. All electrical and electronic equipment at work,

there will be intermient or connuous voltage and

currentchanges,resulnginadiﬀerentfrequencyband

withinorbetweentheelectromagnecenergy,whilethe

corresponding circuits of such energy will be launched

intothesurroundingenvironment.Thesehigh-frequency

interference between the instruments is known as

electromagnecinterference(EMI).

•Operaonaldisruponofelectronicdeviceswheninthe

vicinity of an electromagnec ﬁeld caused by another

device.

• Unwanted signal (noise) emied by electrical circuits

carrying rapidly changing signals.

EMI(Electromagne�cInterference)Shielding

EMIEmissionExamples

Signal

Source

EMI Source

Signal

Receiver

EMI Shielding

• High-speed clocking signals

• Digital noise from processors

•Digitalpowersupplies(higherswitchingfrequencies)

• Transmission interferences

• Buses, interconnects and networking interfaces

EMIImpactExamples

HowtosolveEMIshielding

•Performancedegradaonofreceiversignalprocessing

circuits

• Unintended operaon or malfuncons of electrome-

chanicalequipment,circuits,components

• Voltage breakdown or burnout of components and

antennas

Ways to reduce radiaon interference one is to reduce

theareaofeachcurrentcircuit (Magnecinterference),

and the area and length of the live conductor (Electric

ﬁeldinterference),theotherisEMIshieldingMaterials.

In terms of design engineers with shielding materials is an

eﬀecve way to reduce EMI. For diﬀerent sources of

interference,inconsideringthe sizeandspaallocaon

to install and select the best shielding material for shield-

ing,sothatwecanguaranteethesystemtoachievethe

bestshieldingeﬀecveness.