SILICA GLASS CRUCIBLE FOR PULLING SILICON SINGLE CRYSTAL

摘要

PROBLEM TO BE SOLVED: To provide a silica glass crucible for pulling a silicon single crystal, capable of suppressing the occurrence of brown mold and the occurrence of air pockets in the silicon single crystal and improving pulling yield of the silicon single crystal.

SOLUTION: The silica glass crucible having a straight cylinder section and a bottom section comprises: an innermost layer that comprises a borosilicate glass and has a thickness of 0.05-0.5 mm; an inner layer that comprises a transparent silica glass and has an area in contact with the innermost layer wherein the OH group concentration is less than 30 ppm and the thickness is 3-5 mm; and an outer layer comprising an opaque silica glass.

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