| http://www.w3.org/ns/prov#value | - The substrate 25 comprises, for example, a semiconductor material, such as a silicon or gallium arsenide wafer, with a plurality of layers comprising, for example, an underlayer of silicon dioxide that functions as a gate oxide layer for MOS transistors, and an overlayer of polycide, which is a combination of tungsten silicide, cobalt silicide, and underlying polysilicon layers.
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