About: http://webisa.webdatacommons.org/211319110

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 two protective layers enclose the magneto-optical material to protect it from corrosion, and are formed from materials such as silicon nitride, silicon oxide, or aluminum nitride dielectrics.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com