| http://www.w3.org/ns/prov#value | - It may also be combined with other layers of dielectric material and may, in particular, be surmounted by at least one other layer based on a metal oxide or oxides, such as zinc oxide ZnO, tin oxide SnO2, titanium oxide TiO2, niobium oxide Nb2O5, tantalum oxide Ta2O5, aluminium oxide Al2O3 and tungsten oxide WO3, or any mixture of at least two of these oxides.
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