CRUCIBLE SUPPORT PEDESTAL, QUARTZ CRUCIBLE SUPPORT DEVICE, AND PRODUCTION METHOD OF SILICON SINGLE CRYSTAL

摘要

To provide a crucible support pedestal capable of suppressing opening of a split graphite member top edge at a solidification time of silicon melt.SOLUTION: A crucible support pedestal 12 includes a fittable recess 122 fittable by a split graphite member 11. An opening edge 123 of the fittable recess 122 is constituted so that a contact part P1 with the split graphite member 11 is provided on a position higher than a surface of a solidified material M1 of silicon melt remaining in a quartz crucible 221 after growth of a silicon single crystal, and that force working on the split graphite member 11 following expansion at a solidification time of silicon melt works on a lower position than the contact part P1.SELECTED DRAWING: Figure 2