About: http://webisa.webdatacommons.org/138587166

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	This difficulty is mainly due to the fact that,compared to conventional aluminum metallization layers, copper metallization layers oxidize very quickly when exposed to oxygen in the air.
http://www.w3.org/ns/prov#wasQuotedFrom	docstoc.com