Method and Means of Producing Alarge Dameter Single-crystal Rod Froma Polycrystal Bar Background of the Invention

Content Provider	Semantic Scholar
Copyright Year	2017
Abstract	A method and means for producing a large diameter monocrystalline or single-crystal rod of semicon ducting material from a polycrystalline bar comprising the supporting of the bar at an angle with the vertical and the heating of the lower end to a molten state by means of a high frequency induction coil disposed thereabout. The rod may be formed by passing a monocrystalline seed through a space in the induction coil to contact the molten end of the bar forming a fused junction and retracting the seed downwardly while rotating it to draw the molten bar material between the coils out of the heated area to form a recrystallized rod. An addi tional heating coil may be positioned beneath the angularly disposed bar and heating coil to provide a slow and controlled heat recession during the solidification of the rod and the rod may be gas-doped by introducing the gas into the area of the molten zone. PATENTED SEP21197 3,6O7, 109
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Alternate Webpage(s)	https://patentimages.storage.googleapis.com/a6/6a/b3/94a953125038dd/US3607109.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article