https://www.cryscore.com/silicon-on-sapphire.html As a professional sapphire wafer manufacturer, CRYSCORE can provide standard or custom sapphire wafers with any orientation applied to epitaxy, as well as sapphire windows with any specifications applied to sapphire optics. Patterned sapphire substrates and sapphire ingots also can be provided. Expert in sapphire optics manufacturing.All Rights Reserved