公开(公告)号：EP1632593A4

公开(公告)日：2010-09-15

申请号：EP04729272

申请日：2004-04-23

申请人： STELLA CHEMIFA CORP ,  FUKUDA CRYSTAL LAB LTD

发明人： FUKUDA TSUGUO ,  KIKUYAMA HIROHISA ,  SATONAGA TOMOHIKO

IPC分类号： C30B29/12 ,  C01B9/08 ,  C30B15/00 ,  C30B15/08

CPC分类号： C30B15/08 ,  C01B9/08 ,  C30B29/12 ,  Y10T117/10

公开(公告)号：EP1666644A4

公开(公告)日：2009-05-20

申请号：EP04770823

申请日：2004-07-20

申请人： STELLA CHEMIFA KK ,  FUKUDA CRYSTAL LAB LTD

发明人： SATONAGA TOMOHIKO ,  KIKUYAMA HIROHISA ,  FUKUDA TSUGUO

IPC分类号： C30B29/12 ,  C30B15/08 ,  C30B15/10

CPC分类号： C30B29/12 ,  C30B15/08 ,  C30B15/10

摘要： A method for producing a crystal of a fluoride wherein a single crystal of a fluoride is produced by pulling down the single crystal from a crucible for holding a melt of a raw material for the crystal having a hole in the bottom portion thereof, characterized in that the plane at the exit portion of the above hole has a desired shape of a plane. A crystal of a fluoride having a shape according to the use of the fluoride can be grown by using carbon, platinum or iridium being a material capable of corresponding to a fluoride and designing the shape of a crucible taking the wettability of the fluoride with each of the materials into consideration. The above method can be employed for producing a crystal of a fluoride having an arbitrary shape.