单位换算plating thickness charts

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1、USEFULDATA&CONVERSIONIMPERIALMEASURMENTSTHOUalsoknownasMIL=1Thousand/Inch=25.4MicronsMICROINCH=1Million/Inch=0.0254MicronsSQINCH=645.16SQMMSQFT=92903SQMMMETRICMEASURMENTSMICROMETERalsoknownasMICRON=1Million/Meter1CM=10000Microns1mm=1000Microns1Thou=25.4Microns

2、1Micron=39.37Microinches.MILLIMICRONalsoknownasNANOMETER=1Thousand/Micron1Micron=1000MillimicronsSQDCM=100SQCMs=15.50squareinchesCOPPERWEIGHTS1oz305Gramscopper/SQMeter=35micronthickness2oz610Gramscopper/SQMeter=70microns3oz915Gramscopper/SQMeter=105microns4oz1

3、220Gramscopper/SQMeter=140microns6oz1830Gramscopper/SQMeter=210microns8oz2440Gramscopper/SQMeter=280microns10oz3050Gramscopper/SQMeter=350microns12oz3660Gramscopper/SQMeter=420micronsGOLDPLATINGTECHNOLOGIESANDOTHERSURFACEFINISHUNDERSTANDINGTerminologyAutocatal

4、yticisalsoknownasElectrolessandisachemicallyactivatedplatingsolutionElectroplatingisalsoknownasElectrolyticandrequirestheuseofanode/cathodeandelectricalchargetobuildupthemetaldeposits.ENIGElectrolessNickelImmersionGoldChemicalProcessthatdeposits5–7micronselect

5、rolessnickelthatisthenimmersiongoldplatedwith0.05–0.10micronspuregold.Thisisaselflimitinggoldprocess;thethicknessisconsistentandwontdepositabove0.10.Usedasafinishforsurfacemountsolderingwithsolderpasteandreflowtechnology.Thegoldisusedtoprotectthequalityoftheni

6、ckelplateandpreventoxidisation.TherearetwoversionsofENIGthisisonlytobeconsideredwhenwirebondingisrequiredthestandardfinishhasbetween8-10%phosphorousandissuitableforALwires,TheHi-Phosphorouscontentversionhas10-14%contentandcanalsobegoldwirebonded,thelatterismor

7、eexpensiveastheprocesstimeissignificantlylonger.Immersiongoldwithareducedgoldcontentof0.02-0.03iscommonlyreferredtoasflashgoldinthefareast,thisisnottoberecommendedasshelf-lifeisgreatlyreduced.ENIPIGElectrolessNickelImmersionPalladiumImmersionGoldChemicalProces

8、sthatdeposits5–7micronselectrolessnickelthisisthenplatedwithaverythinlayerofPalladium0.02–0.04microns,ontothisafurther0.05micronspuregoldisaddedboththepreciousmetalsareimmersionpro