Electrochemical migration (ECM) is the dissolution and movement of metal ions in presense of electric potential, which results in the growth of dendritic structures between anode and cathode. The process is most commonly observed in printed circuit boards where it may significantly decrease the insulation between conductors. The main factor facili...
Found on
http://en.wikipedia.org/wiki/Electrochemical_migration
transport of ions in an electrolyte due to an electric field
Found on
http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=111-15-41
Gradual movement of corrosive or conductive materials that may create unwanted circuit paths and cause performance degradation or failure. Migration is usually caused by exposure of existing contaminant residues or bare metal surfaces to a combination of high humidity, elevated temperatures, and an electrical potential.
Found on
http://www.encyclo.co.uk/local/20870
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