NOBLE METAL CRUCIBLE FOR SIGNAL CRYSTAL GROWTH BY PULLING UP METHOD

摘要

PROBLEM TO BE SOLVED: To make it possible to inexpensively grow a single crystal having stable quality by forming a crucible having a long life and hardly deformable structure. ;SOLUTION: This noble metal crucible is used for housing molten raw material in the case the single crystal is grown by a pulling up method. This noble metal crucible 30 has a structure obtd. by brining a reinforcing noble metal plate consisting of a material incorporated with an oxide to a noble metal of the same material as the material of the crucible body into tight contact with the outer peripheral part of the noble metal crucible body having a blind cylindrical shape. The structure obtd. by reinforcing, for example, a pure platinum crucible platinum crucible body 32 by bringing a belt-like platinum plate 34 formed by adding ≤1 wt.% zirconium oxide or yttrium oxide to the pure platinum into tight contact with the outer periphery of this crucible is adequate.;COPYRIGHT: (C)1998,JPO