Transcription of MSL Ratings and Reflow Profiles - Texas Instruments
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MSL Ratings and Reflow Profiles - Texas Instruments
ApplicationReportSPRABY1 relationshipof MSLratingto floorlife and surfacemountreflowtemperaturesfor TI MoistureSensitivityLevel(MSL).. of Figures1 Exampleof ComponentMSLR atingand PeakReflowof PeakReflowLabelingon Representationof a of Tables1 FactoryFloorLife @ 30 (Tc) Basedon trademarksare the propertyof February2015 MSLR atingsand ReflowProfilesSubmitDocumentationFeedbac kCopyright 2015,TexasInstrumentsIncorporated TI surfacemountICs havea moisturesensitivityleveland informationisdisplayedon (seeFigure1) and on the reel and box showsanexampleof a box Exampleof ComponentMSLR atingand PeakReflowof MSLR atingand PeakReflowLabelingon Box2 Applyingthe MoistureSensitivityLevel(MSL)The MSLratingof an IC determinesits floorlife beforethe boardmountingonceits dry bag has the electronicsindustrystandardfor definingMSLratingsversusfloorlife at30 C, as shownin FactoryFloorLife @ 30 CMSLF loorLifeMoistureRelativeHumidity1 Unlimited85%RH21 year2a4 weeks3168 hours472 hours60%RH548 hours5a24 hours6 Bakebeforeuse and reflowwithintime on labelMostsemiconductorproductsare ratedMSL3or is the highestratingwhereit is consideredas beingnot moisturesensitiveevenat 85%RH and componentsratedMSL1do not requiredry MSLratingis givenafterproductqualificationand determinedby the materialsusedin its ICpackagingand assemblyprocessis basedon a constant30 C and practice,the absorpt
www.ti.com Peak Reflow Temperature Similarly, exposing it to higher humidity conditions or higher temperatures potentially shortens the floor life. The Recommended Equivalent Total Floor Life table in IPC/JEDEC J-STD-033C provides guidance on floor life for differing temperatures (20°C to 35°C) and a range of relative humidity (5% to 95%) for
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