Coated crucible and method of making a coated crucible
OwnerRobert Billings Bramhall, JR., Dane Fawkes +1inventors
InventorsRobert Billings Bramhall, JR., Dane Fawkes, Van Den Hock
Life of this patent
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Abstract
A crucible for forming a boule in a portion of an interior volume of the crucible. The crucible has a crucible base material forming the interior volume. The crucible base material is separated from the boule by a barrier coat disposed between the boule and the crucible base material. The barrier coat has a pin free conformal thickness conforming to a surface of the crucible base material regardless of a shape of a surface feature on the surface, the barrier coat having a melting point higher than that of the boule.
Claims20
A reusable crucible for forming a boule in a portion of an interior volume of the crucible, the crucible comprising:
- a crucible base material forming the interior volume;
- a barrier coat disposed on the base material so that the crucible base material is separated from the boule by the barrier coat disposed between the boule and the crucible base material;
- and
- the barrier coat having a pin free conformal and uniform thickness conforming to a surface of the crucible base material regardless of a shape of a surface feature on the surface, the barrier coat having a melting point higher than that of the boule.
A crucible for forming a sapphire boule in a portion of an interior volume of the crucible, the crucible comprising:
- a molybdenum base material forming the interior volume;
- a noble metal barrier coat disposed on the molybdenum base material so that the molybdenum base material is separated from the sapphire boule by the noble metal barrier coat disposed between the sapphire boule and the molybdenum base material;
- and
- the noble metal barrier coat having a pin free, non porous and uniform conformal thickness conforming to a surface of the crucible base material, the noble metal barrier coat having a melting point higher than that of the sapphire boule.
A method of forming a crucible, the crucible for forming a boule in a portion of an interior volume of the crucible, the method comprising:
- providing a crucible base material;
- cleaning the crucible base material;
- and
- coating a barrier coat on at least a portion of the crucible base material, the barrier coat having a pin free, conformal and uniform thickness conforming to a surface of the crucible base material regardless of a shape of a surface feature on the surface, the barrier coat having a melting point higher than that of the boule.
Dependencies are inferred from the claim text.