Single crystal production apparatus and single crystal production method
OwnerShin Akutsuinventor
Life of this patent
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Abstract
A single crystal production apparatus that is designed to produce a single crystal by cooling a melting zone formed by a heating part including an infrared generation part and a reflection part, wherein: the reflection part includes a spheroidal mirror and a concave spherical mirror; the infrared generation part is disposed at one focal point of the spheroidal mirror; an opening is formed in the spheroidal mirror on the side of the other focal point of the spheroidal mirror; and the one focal point and the spherical center of the concave spherical mirror fall on the same location.
Claims11
A single crystal production apparatus that produces a single crystal by cooling a melting zone formed by heating a raw material through reflection of an infrared ray, the single crystal production apparatus comprising:
- a reflection part reflecting the infrared ray toward the raw material;
- and an infrared generation part generating the infrared ray,
- wherein the reflection part comprises a spheroidal mirror and a concave spherical mirror,
- wherein the infrared generation part is disposed at one focal point F1 of the spheroidal mirror,
- wherein an opening is formed in the spheroidal mirror on a side of an other focal point F0 of the spheroidal mirror, the other focal point F0 coinciding with a site where the melting zone is formed,
- wherein the concave spherical mirror is provided at a location at which the concave spherical mirror opposes the opening of the spheroidal mirror,
- wherein the one focal point F1 and a spherical center of the concave spherical mirror fall on a same location,
- wherein at least one from among a location of the concave spherical mirror relative to the opening of the spheroidal mirror and a range through which the concave spherical mirror covers die opening is variable, and
- wherein the concave spherical mirror is movable, such that the concave spherical mirror is accommodated in a location where the concave spherical mirror does not oppose the opening prior to in a case that the single crystal production apparatus is in use, and in the case that the single crystal production apparatus is in use, the concave spherical mirror is moved in a sliding, manner to a location where the concave spherical mirror opposes the opening.
Dependencies are inferred from the claim text.