Surface modified quartz glass crucible, and its modification...

Single-crystal – oriented-crystal – and epitaxy growth processes; – Processes of growth from liquid or supercritical state – Having growth from a solution comprising a solvent which is...

Reexamination Certificate

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C117S054000, C117S068000, C117S003000, C117S004000, C117S005000, C117S200000, C117S900000

Reexamination Certificate

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07993454

ABSTRACT:
A surface modified quartz glass crucible and a process for modifying the crucible includes a layer of a metal oxide on the whole or a part of the inside and/or outside of the crucible, and baking it. At least an inside surface of the crucible is coated with a said metal oxide of magnesium, calcium, strontium or barium. The coated layer of the crucible does not abrade easily and provides a high dislocation free ratio of silicon single crystals pulled by using the crucible.

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