杜邦 PV17A Technical Data Sheet

DuPont™Solamet®PV17AphotovoltaicmetallizationPreliminaryTechnicalDataSheetProductDescriptionDuPont™Solamet®PV17Aphotovoltaicmetallizationfrontsidepasteisahighlyconductivesilvercomposition,partoftheDuPont™Solamet®PV17Xfamily,designedtopro-videexcellentefficiency,reliablesolderedadhesionandlowlaydown.Thispastemaybecofiredwithbackside(p-type)aluminumconductorssuchasDuPont™Solamet®PV3XXandDuPont™Solamet®PV5XXtabbingsilvers.Itisdesignedforrapiddryandveryfast(spike)firing.ProductBenefits• ImprovedefficiencyoverDuPont™Solamet®PV16Xfamily• Reducedjunctiondamage• Excellentsolderabilityandconsistentsolderedadhe-sion• Lowlaydown• Fastdryingandfiring• Excellentfinelinecapabilities• Highelectricalconductivityafterfiring• Cadmiumfree**Cadmium‘free’asusedhereinmeansthatcadmiumisnotintentionallyaddedtotheproduct.Traceamountshowevermaybepresent.ProcessingSummary• ApplicationStandardscreenprintprocess• PrintingSpeed6–10in/sec(150–250mm/sec)• ScreenType325meshstainlesssteelpreferredfor70µmopen;400meshstainlesssteelpreferredfor70µm• DryingVerticalDryer170–230°C10minutesIRBeltDryer150–300°C1minuteFlexibleinaccordancewithindustrypractice.Actualsettingstobedeterminedbydryertype• TypicalLineResolution60–100µmscreendesignedwidth• SolderingCompatiblewithindustrystandardmaterialandconditionFluxtype:non-clean,reactivitylevelL0/M0(Standard:ANSI/J-STD-004)Ribbon:compatiblewithPbcontainedandPbfreesoldermaterial,i.e.60Sn/40Pb,62Sn/36Pb/2Ag,96.5Sn/3.5AgViscosity(Pa·s)(BrookfieldHBT,10rpmSC4-14/6Rutilitycupandspindle,25°C)220–350Solids(%)at750°C89–91FinenessofGrind(4th/50%)7µm/5µmResistivity(mΩ/sq/10µm)5Thinner9450ShelfLife(months)6Table1:TypicalPhysicalProperties___________________________________________________Allvaluesreportedhereareresultsofexperimentsinourlaboratoriesintendedtoillustrateproductperformancepotentialwithagivenexperimentaldesign.Theyarenotintendedtorepresenttheproduct’sspecifications,detailsofwhichareavailableupondemand.(I)(II)(III)Mesh(stainlesssteel)290325400WireDiameter(µm)202318EmulsionThickness(µm)20–25MeshAngle(degrees)22–30PastePreparationThecompositionshouldbethoroughlymixedbeforeuse.Thisisbestachievedbyslow,gentlehandstirringwithacleanburr-freespatula(flexibleplastic)for1–2minutes.JarrollingisNOTrecommended,asthiscouldchangetherheologyofthematerial.Careshouldbetakentoavoidairentrapment.PrintingPrintingshouldbecarriedoutinaclean,well-ventilatedarea.DuPont™Solamet®PV17Aphotovoltaiccomposition,initscontainer,shouldbeatambienttemperaturepriortocommencementofprinting.FiringSolamet®PV17Aisdesignedforrapid(spike)firing.Thermalbudgetabove600°Cshouldbekepttominimum,ideally8secondstoensureoptimumelectricalcontacttothewafer.Togetthebestelectricalperformance,PV17Ashouldbefiredatapeaktempera-turearound30°ChigherthanforPV16Xconductors.SeeChart1fortypicalfiringprofile.Actualfurnacesettingsandbeltspeedwilldependonthewaferthickness,texturingandemitterresistivityastheseinfluencethetemperatureofthewaferduringfiring.Itisimportantthatwafersarefiredinawellventilatedfurnace,withacontinuoussupplyofcleanfilteredair.Air-flowandextractionratesshouldbeoptimizedtoensurethatoxidizingconditionsexistwithinthefurnacefiringchamber,especiallywhenfrontandbacksideconductorsarecofired.Chart1TypicalFiringProfileThinnerSolamet®PV17Acompositionisoptimizedforscreenprintingandthinningisnotnormallyrequired.UsetheDuPontrecommendedthinnerforslightadjustmentstoviscosityortoreplaceevaporationlosses.Theuseoftoomuchthinnerortheuseofanonrecommendedthinnermayaffecttherheologicalbehaviorofthematerialanditsprintingcharacteristics.PleaserefertoTable1.StorageandShelfLifeContainersmaybestoredinaclean,stableenvironmentatroomtemperature(between5°C–25°C)withtheirlidstightlysealed.Storageinhightemperature(25°C)orinfreezers(temperature0°C)isNOTrecommendedasthiscouldcauseirreversiblechangesinthematerial.SafetyandHandlingForinformationonhealthandsafetyregulationspleaserefertothespecificproductMSDS.Copyright©2011DuPont.Allrightsreserved.TheDuPontOval,DuPont™,Themiraclesofscience™,Solamet™andallproductsorwordsdenotedwith®or™areregisteredtrademarksortrademarksofE.I.duPontdeNemoursandCompanyoritsaffiliates(“DuPont”).NOPARTOFTHISMATERIALMAYBEREPRODUCED,STOREDINARETRIEVALSYSTEMORTRANSMITTEDINANYFORMORBYANYMEANSELECTRONIC,MECHANICAL,PHOTOCOPYING,RECORDINGOROTHERWISEWITHOUTTHEPRIORWRITTENPERMISSIONOFDUPONT.Caution:DonotuseinmedicalapplicationsinvolvingimplantationinthehumanbodyorcontactwithinternalbodyfluidsortissueunlesstheproductisprovidedbyDuPontunderaformalwrittencontractconsistentwiththeDuPontPolicyRegardingMedicalApplicationsofDuPontMaterialsH-50103-3(“MedicalApplicationsPolicy”)andwhichexpresslyacknowledgesthecontemplateduse.Foradditionalinformation,pleaserequestacopyofDuPontMedicalCautionStatementH-50102-3andtheDuPontMedicalApplicationsPolicy.Theinformationprovidedhereinisofferedfortheproductuser’sconsiderationandexamination.Whiletheinformationisbasedondatabelievedtobereliable,DuPontmakesnowarranties,expressedorimpliedastothedata’saccuracyorreliabilityandassumesnoliab