Design for Reliability: PCBs - DfR Solutions

Pb-Free HASL (Hot Air Solder Leveling)• Good choice when excellent solderability is required• Thick boards that require LF wave soldering.• Robust in multiple reflow cycles.• Long shelf life required• Flatness not as good as other finishes (but an improvementover SnPb HASL).• Could potentially be a problem with very fine pitch components• High volume equipment is not yet in production.• Horizontal LF lines are available but few are in production since highvolume demand is needed to make them cost effective.© 2004 - 2007 2010