Designation:F459−13StandardTestMethodsforMeasuringPullStrengthofMicroelectronicWireBonds1ThisstandardisissuedunderthefixeddesignationF459;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope1.1Thesetestmethodscoverteststodeterminethepullstrengthofaseriesofwirebonds.Instructionsareprovidedtomodifythemethodsforuseasarefereemethod.Themethodscanbeusedforwirebondsmadewithwirehavingadiameteroffrom0.0007to0.003in.(18to76µm).NOTE1—Commonusageatthepresenttimeconsiderstheterm“wirebond”toincludetheentireinterconnection:bothweldsandtheinterven-ingwirespan.1.2Thesetestmethodscanbeusedonlywhentheloopheightofthewirebondislargeenoughtoallowasuitablehookforpulling(seeFig.1)tobeplacedunderthewire.1.3Theprecisionofthesemethodshasbeenevaluatedforaluminumultra-sonicwedgebonds;however,thesemethodscanbeusedforgoldandcopperwedgeorballbonds.21.4Thesemethodsaredestructive.Theyareappropriateforuseinprocessdevelopmentor,withapropersamplingplan,forprocesscontrolorqualityassurance.1.5AnondestructiveprocedureisdescribedinPracticeF458.1.6ThevaluesinSIunitsaretoberegardedasstandard.1.7Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:3F458PracticeforNondestructivePullTestingofWireBonds3.Terminology3.1DefinitionsofTermsSpecifictoThisStandard:3.1.1Forthepurposesofthesetestmethodsthefollowingfailurepointsaredefined:3.1.2bond-wirejunctionfailure—aruptureinthewirewithintwowirediametersofthebondandinwhichmorethan25%ofthebondedareaisleftonthepadafterthepulltesthasbeenapplied.3.1.3weldinterfacefa...
