<http://webisa.webdatacommons.org/183697221>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.com> .
<http://webisa.webdatacommons.org/183697221>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/442227911>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/183697221> .
<http://webisa.webdatacommons.org/183697221>	<http://www.w3.org/ns/prov#value>	"However, even with the various types of barrier layers, copper is still subject to strong electro-migration, or movement of copper atoms under current which can lead to voids in the copper channels and vias." .