Lead-free Reliability: Equal or Better?

摘要

Lead (Pb) historically has been used with tin (Sn) in solders because SnPb alloys process well, require low melting temperatures and wet copper effectively. These attributes, in addition to the abundance and low cost of lead, have made SnPb solders the material of choice for millennia. SnPb solder was more ancient to Alexander the Great than he is to us. However, the toxicity of lead is driving SnPb's "demise" as the solder of choice for electronics applications.