Single crystal growing method
AssigneesNGK Insulators, Ltd., Osaka University, Toyoda Gosei Co., Ltd.
InventorsMakoto Iwai, Takanao Shimodaira, Shuhei Higashihara, Takatomo Sasaki, Yusuke Mori, Fumio Kawamura, Shiro Yamasaki, Koji Hirata
Life of this patent
Estimating the term…
Abstract
In a method of growing a single crystal by melting a raw material within a vessel under a nitrogenous and non-oxidizing atmosphere, the vessel is oscillated and the melted raw material is contacted with an agitation medium made of a solid unreactive with the melted raw material.
Claims11
A method of growing a single crystal by melting nitrogen in a melted raw material within a vessel having a central axis “L” and a bottom face under a nitrogenous and non-oxidizing atmosphere, the method comprising:
- immersing a seed crystal and an agitation medium in a melted raw material, wherein said agitation medium has a spherical shape and at least a surface of said agitation medium comprises a material unreactive with the melted raw material;
- while the melted raw material is in contact with said agitation medium, oscillating the vessel around a rotating axis “R” with the central axis “L” of the vessel inclined at an angle θ with respect to an oscillating plane “T” that is perpendicular to the rotating axis “R” so that the agitation medium rolls on the bottom face of the vessel;
- and
- growing the single crystal on the seed crystal.
A method of growing a single crystal by melting nitrogen in a melted raw material within a vessel comprising a bottom face under a nitrogenous and non-oxidizing atmosphere, the method comprising:
- immersing a seed crystal and an agitation medium in the melted raw material, wherein the agitation medium has a spherical shape;
- while the melted raw material is in contact with the agitation medium, rotating the vessel upon itself around an axis “R1” of rotation inclined at an angle θ with respect to vertical line “P” so that the agitation medium is rolled on the bottom face of the vessel, wherein at least a surface of the agitation medium comprises a material unreactive with the melted raw material;
- and
- growing the single crystal on the seed crystal.
Dependencies are inferred from the claim text.