ANSI-ESD S20.20-2014 Electrostatic Discharge Contr

ANSI/ESDS20.20-2014RevisionofANSI/ESDS20.20-2007FortheDevelopmentofanElectrostaticDischargeControlProgramfor–ProtectionofElectricalandElectronicParts,AssembliesandEquipment(ExcludingElectricallyInitiatedExplosiveDevices)ElectrostaticDischargeAssociation7900TurinRoad,Bldg.3Rome,NY13440AnAmericanNationalStandardApprovedJuly31,2014ANSI/ESDS20.20-2014ESDAssociationStandardfortheDevelopmentofanElectrostaticDischargeControlProgramfor–ProtectionofElectricalandElectronicParts,AssembliesandEquipment(ExcludingElectricallyInitiatedExplosiveDevices)ApprovedJune11,2014EOS/ESDAssociation,Inc.®ANSI/ESDS20.20-2014iiElectrostaticDischargeAssociation(ESDA)standardsandpublicationsaredesignedtoservethepublicinterestbyeliminatingmisunderstandingsbetweenmanufacturersandpurchasers,facilitatingtheinterchangeabilityandimprovementofproductsandassistingthepurchaserinselectingandobtainingtheproperproductforhisparticularneeds.Theexistenceofsuchstandardsandpublicationsshallnotinanyrespectprecludeanymemberornon-memberoftheAssociationfrommanufacturingorsellingproductsnotconformingtosuchstandardsandpublications.NorshallthefactthatastandardorpublicationispublishedbytheAssociationprecludeitsvoluntaryusebynon-membersoftheAssociation,whetherthedocumentistobeusedeitherdomesticallyorinternationally.RecommendedstandardsandpublicationsareadoptedbytheESDAinaccordancewiththeANSIPatentpolicy.InterpretationofESDAStandards:Theinterpretationofstandardsin-so-farasitmayrelatetoaspecificproductormanufacturerisapropermatterfortheindividualcompanyconcernedandcannotbeundertakenbyanypersonactingfortheESDA.TheESDAStandardsChairmanmaymakecommentslimitedtoanexplanationorclarificationofthetechnicallanguageorprovisionsinastandard,butnotrelatedtoitsapplicationtospecificproductsandmanufacturers.NootherpersonisauthorizedtocommentonbehalfoftheESDAonanyESDAStandard.THECONTENTSOFESDA’SSTANDARDSANDPUBLICATIONSAREPROVIDED“AS-IS,”ANDESDAMAKESNOREPRESENTATIONSORWARRANTIES,EXPRESSEDORIMPLIED,OFANYKINDWITHRESPECTTOSUCHCONTENTS.ESDADISCLAIMSALLREPRESENTATIONSANDWARRANTIES,INCLUDING,WITHOUTLIMITATION,WARRANTIESOFMERCHANTABILITY,FITNESSFORAPARTICULARPURPOSEORUSE,TITLEANDNON-INFRINGEMENT.ESDASTANDARDSANDPUBLICATIONSARECONSIDEREDTECHNICALLYSOUNDATTHETIMETHEYAREAPPROVEDFORPUBLICATION.THEYARENOTASUBSTITUTEFORAPRODUCTSELLERS’ORUSERS’OWNJUDGEMENTWITHRESPECTTOANYPARTICULARPRODUCTDISCUSSED,ANDESDADOESNOTUNDERTAKETOGUARANTEETHEPERFORMANCEOFANYINDIVIDUALMANUFACTURERS’PRODUCTSBYVIRTUEOFSUCHSTANDARDSORPUBLICATIONS.THUS,ESDAEXPRESSLYDISLAIMSANYRESPONSIBILITYFORDAMAGESARISINGFROMTHEUSE,APPLICATION,ORRELIANCEBYOTHERSONTHEINFORMATIONCONTAINEDINTHESESTANDARDSORPUBLICATIONS.NEITHERESDA,NORITSMEMBERS,OFFICERS,EMPLOYEESOROTHERREPRESENTATIVESWILLBELIABLEFORDAMAGESARISINGOUTOF,ORINCONNECTIONWITH,THEUSEORMISUSEOFESDASTANDARDSORPUBLICATIONS,EVENIFADVISEDOFTHEPOSSIBILITYTHEREOF.THISISACOMPREHENSIVELIMITATIONOFLIABILITYTHATAPPLIESTOALLDAMAGESOFANYKIND,INCLUDINGWITHOUTLIMITATION,LOSSOFDATA,INCOMEORPROFIT,LOSSOFORDAMAGETOPROPERTYANDCLAIMSOFTHIRDPARTIES.Publishedby:ElectrostaticDischargeAssociation7900TurinRoad,Bldg.3Rome,NY13440Copyright©2014byESDAssociationAllrightsreservedNopartofthispublicationmaybereproducedinanyform,inanelectronicretrievalsystemorotherwise,withoutthepriorwrittenpermissionofthepublisher.PrintedintheUnitedStatesofAmericaISBN:1-58537-263-3CAUTIONNOTICEDISCLAIMEROFWARRANTIESDISCLAIMEROFGUARANTYLIMITATIONONESDA’sLIABILITYANSI/ESDS20.20-2014i(ThisforewordisnotpartofESDAssociationStandardANSI/ESDS20.20-2014)FOREWORDThisstandardcoverstherequirementsnecessarytodesign,establish,implementandmaintainanElectrostaticDischarge(ESD)ControlProgramforactivitiesthatmanufacture,process,assemble,install,package,label,service,test,inspectorotherwisehandleelectricalorelectronicparts,assembliesandequipmentsusceptibletodamagebyelectrostaticdischargesgreaterthanorequalto100voltsHumanBodyModel(HBM)and200voltsChargedDeviceModel(CDM).TheCDMvoltagelevelasusedinthisdocumentisbasedonmanagingprocessessentialinsulatorstomitigatefieldinducedvoltagesondevicesthatcouldleadtodamage.Thisstandardalsodefinestherequirementsforisolatedconductors.ThereferencetoMachineModel(MM)isretainedinthisstandardforthehistoricalassociationtotheMMrobustnessofdevicestoisolatedconductors.TheESDrobustnessofdevicesisfullycharacterizedbyHBMandCDM.TheCDMmodeldescribesthemetal-to-metalcontactthatwasformerlyassociatedwithMM.Therefore,MMtestingisnolongerrequiredforqualificationofdevicesandtestdatamaynotbeavailable.ThisdocumentcoverstheESDControlProgramrequirementsforsettingupaprogramtohandleESDsensitive(ESDS)itemsbasedonthehistoricalexperienceofbothmilitaryandcommercialorganizations.ReferencesincludeESDAssociation,U.S.MilitaryandANSIapprovedstandardsformaterialpropertiesandtestmethods.ThefundamentalESDcontrolprinciplesthatformthebasisofthisdocumentare:A.Allconductorsintheenvironment,includingpersonnel,shallbebondedorelectricallyconnectedandattachedtoaknowngroundorcontrivedground(asonshipboardoronaircraft).Thisattachmentcreatesanequipotentialbalancebet