Synthetic Sapphire is a single crystal form of corundum, Al2O3, also known as alpha-alumina, alumina, and single crystal Al2O3. Sapphire is aluminium oxide in purest form with no porosity or grain boundaries, making it theoretically dense. The combination of favourable chemical, electrical, mechanical, optical, surface, thermal, and durability properties make sapphire preferred material for high performance system and component designs.Sapphire is a very useful optical window material for use in the UV, visible, and near infra-red. For various semiconductor applications sapphire is the best choice in the comparison with other synthetic single-crystals.
      Sapphire substrates / wafers: EPI-polished, optically polished, lapped or as-cut sapphire disks, windows, substrates, blanks as well as epitaxial structures “silicon-on-sapphire”

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