HASL Finish on PWBs

Using SEM/EDS to Evaluate HASL Coatings

 

This presentation discusses how poor HASL quality on PWBs can affect PCBAs.  Several examples of poor HASL quality are illustrated with SEM/EDS data.  Recommendations are made for mitigation of this recurring quality issue.

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A complete listing of all of our papers can be found here:

Papers

 

BSE SEM image of Sn-Pb HASL finish
BSE SEM image of Sn-Pb HASL finish