公开(公告)号：JP2003171199A

公开(公告)日：2003-06-17

申请号：JP2001365912

申请日：2001-11-30

Applicant: NAT INST FOR MATERIALS SCIENCE

Inventor： KITAMURA KENJI ,  TAKEGAWA SHUNJI ,  NAKAMURA MASARU ,  FURUKAWA YASUNORI ,  KAKIMOTO KOICHI

IPC: C30B29/30 ,  C30B15/00

Abstract: PROBLEM TO BE SOLVED: To provide a mean for surely manufacturing a single crystal having a large diameter and free from inclusions. SOLUTION: A lithium niobate single crystal or lithium tantalate single crystal having a large diameter and free from inclusions such as air bubbles is obtained by applying an accelerated crucible rotation technique (ACRT) comprising changing the rotation number or the rotation direction of a crucible to a single crystal growth technique based on a double crucible method, and thereby, controlling the movement of the crucible and enhancing the agitation effect. COPYRIGHT: (C)2003,JPO