About: http://webisa.webdatacommons.org/229354427

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, since the crystal growth by use of the three kinds of methods as mentioned above is epitaxial growth, there is the drawback that an expensive compound semiconductor substrate such as GaAs, etc. must be used as the substrate.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com.au