C - Chemistry – Metallurgy – 30 – B
Patent
C - Chemistry, Metallurgy
30
B
148/1.2
C30B 15/00 (2006.01) C30B 11/00 (2006.01)
Patent
CA 1197755
ABSTRACT A method and an apparatus for controlled directional solidification of semiconductor alloys of at least two constituents. The method comprises heating at least two different constituents so that they are combined in a liquid phase molten material of uniform composition with at least a portion of the molten material lying in a plane, and rapidly cooling at least a portion of the molten material so that a planar solidification front passes rapidly through at least a portion of the molten material in a direction perpendicular to the plane until at least a portion of the molten material is rapidly solidified. The apparatus comprises a vessel for containing the constituents of the alloy, the vessel having an interior planar surface. Also included is heating apparatus for heating the constituents in the vessel so that a liquid phase molten material of uniform composition is formed. The apparatus further comprises cooling apparatus for rapidly supplying uniform cooling to the interior planar surface in order to cause rapid solidification in at least a portion of the molten material, whereby a planar solidification front passes rapidly through at least a portion of the molten material in a direction perpendicular to the interior planar surface of the vessel. -18-
376161
Honeywell Inc.
Smart & Biggar
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