About: http://webisa.webdatacommons.org/22868279

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 optical fields in the waveguides may penetrate a passivation layer, formed from materials such as alumina and silicon dioxide, to a depth of about one micron.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com