| 摘要 |
PROBLEM TO BE SOLVED: To provide an apparatus for growing a single crystal, which prevents cracks from being caused in a crystal in the process of producing a single crystal to be used as a substrate for an optical device or the like. SOLUTION: A single crystal free of cracks can be obtained with high reproducibility regardless of a large difference in thermal expansion between a platinum crucible and an LN (lithium niobate) single crystal in the process of growing an LN single crystal by VB (vertical Bridgeman) method, by employing a crucible structure of the present invention having a foil type platinum plate inserted inside the platinum crucible for growing a crystal. COPYRIGHT: (C)2011,JPO&INPIT |
