About: http://webisa.webdatacommons.org/281291388

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	The main purpose of this layer is to prevent or at least reduce diffusion of copper, iron and nickel and their products, such as oxides, to the surface of the leads, especially to the surface which is to be soldered.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com