| http://www.w3.org/ns/prov#value | - ns thereof, the ceramic matrix comprising a second material selected from the group consisting of SiO2, SnO2, In2 O3, GeO2, TiO2, Ta2 O5, ZnO, ZrO2, Y2 O3, CdO, Si3 N4, TiN and other transition metal nitrides and combinations thereof, the substrate previously selectively being exposed to high power laser light such that bits thereof so exposed to the high power laser light have a reflec
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