HB01000 - SEMI HB10 - Specification for Single Crystal Sapphire Intended for Use for Manufacturing HB-LED Wafers

 NOTICE: This Standard or Safety Guideline has an Inactive Status because the conditions to maintain Current Status have not been met. Inactive Standards or Safety Guidelines are available from SEMI and continue to be valid for use. Sapphire has become the most popular substrate material in the HB-LED industry. This Standard identifies and defines the key parameters of sapphire intended for use in manufacturing HB-LED wafers. The properties of sapphire are decided by physical and chemical parameters and crystal defects. These key parameters of the sapphire are intended to provide the necessary information to specify the sapphire material for manufacturing HB-LED wafers. This Standard includes the physical and chemical parameters of sapphire, and the crystal defects. The physical and chemical parameters include hardness, transmission, and the purity. The crystal defects include etch pit density (EPD), bubbles, cloud, grain boundary, inclusion, color, and crack. This Standard does not de