Design for Reliability: PCBs - DfR Solutions
Design for Reliability: PCBs - DfR Solutions
Design for Reliability: PCBs - DfR Solutions
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
Surface Finishes - Post Pb-FreeooMultiple Pb-Free Surface Finish Options Now Exists.oNo clear winner, no ideal solution.2003Each PCB surface has different advantages and disadvantagesthat affects fabrication, solderability, testability, reliability, orshelf life.Surface Finishes,WorldwideoooThe 5 most popular Pb-Free Surface Finishes are:oooooElectroless nickel/immersion gold (ENIG)oAnd ENEPIG (electroless Pd added)Immersion silver (ImAg)Immersion tin (ImSn)Organic solderability preservative (OSP)Pb-free HASL.2007These finishes (except <strong>for</strong> Pb-free HASL)have been in use <strong>for</strong> several years.Newer finishes are currently being developed (direct Pd,PTFE-like coatings, etc.18%Ref: J. BeersGold Circuits© 2004 - 2007 2010