About: http://webisa.webdatacommons.org/80396401

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	further that although a semi-insulating, i.e. highly resistive, substrate can be obtained usually by doping an impurity such as Cr or O or both, such an impurity requires to be doped at a high temperature of around 800 .degree.
http://www.w3.org/ns/prov#wasQuotedFrom	patents.com