| http://www.w3.org/ns/prov#value | - Preferred materials for the barrier layer 74 are metals such as titanium (Ti), zirconium (Zr), tungsten (W), or hafnium (Hf), metal compounds such as tantalum nitride (TaN), refractory metal silicides such as titanium silicide (TiSi) or zirconium silicide (ZrSi), among others.
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