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The substrate, for instance, may be formed from ceramic materials, such as alumina (Al2O3), quartz glass (SiO2), magnesia (MgO), forsterite (2MgO.SiO2), steatite (MgO.SiO2), mullite (3Al2O3.2SiO2), beryllia (BeO), zirconia (ZrO2), aluminum nitride (AlN), silicon nitride (SiN), silicon carbide (SiC), glass, heat resistant glass, and so forth.
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