About: http://webisa.webdatacommons.org/293438302

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	In the embodiments of the present invention, the substrate 11 is a disk formed of a hard material such as metal, glass and ceramics.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com