About: http://webisa.webdatacommons.org/390067067

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	As indicated therein, the back electrical contact layer 12 is needed only if substrate 10 is an insulating material such as a ceramic or glass.
http://www.w3.org/ns/prov#wasQuotedFrom	google.ca