| http://www.w3.org/ns/prov#value | - Further, although examples mainly using Si as a high-refractive-index material forming projecting portions were described as embodiments of the present invention, embodiments of the present invention are not limited to these example, and, C (diamond), amorphous Si, microcrystalline Si, polycrystalline Si, SixNy (where x and y are arbitrary numbers), TiO2, TeO2, Al2O3, Y2O3, La2O2S, LiGaO2, BaTiO3,
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