| http://www.w3.org/ns/prov#value | - The thin film 2 is made of a conductor, such as aluminum (Al) or chromium (Cr), a semiconductor, such as a polycrystalline silicon (p-Si) or amorphous silicon (a-Si) or an insulating material, such as silicon dioxide (SiO2) or silicon nitride (Si3 N4).
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