Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Date of Patent
January 6, 2009
Patent Application Number
11884836
Date Filed
March 9, 2006
Patent Primary Examiner
Patent abstract
A crystal growth crucible made of boron nitride includes a cylindrical tip portion for accommodating a seed crystal, and a cylindrical straight-body portion for growing a crystal, which is formed above the tip portion and has a diameter larger than that of the tip portion. Thickness T1 of the tip portion and thickness T2 of the straight-body portion satisfy a condition of 0.1 mm≦T2<T1≦5 mm, and inside diameter D2 and length L2 of the straight-body portion satisfy conditions of 100 mm<D2 and 2<L2/D2<5.
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