Crucible-free zone refining of semiconductor material including

Details Crucible-free zone refining of semiconductor material including Crucible-free zone refining of semiconductor material including

1977-10-11

1979-02-20

Emery, Stephen J.

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

156DIG98, 422250, B01J 1710

Patent

active

041405714

ABSTRACT:
A process for the crucible-free zone pulling of a polycrystalline rod held ertically, together with a seed crystal fixed at its lower end, in which a melting zone is produced by means of an induction heating coil surrounding the rod, which zone, by means of relative movement of the coil and rod, traverses the entire length of the rod starting from the seed crystal, characterized in that after attaching the seed crystal to the rod, a support member is moved, below the induction heating coil, towards the rod, which support member rests gently against the rod and after being positioned, solidifies to form a firm support for the rod. A device for carrying out the process is also included.

REFERENCES:
patent: 3234009 (1966-02-01), Siebertz
patent: 3403007 (1968-09-01), Drangel
patent: 3923468 (1975-12-01), Keller
patent: 3972684 (1976-08-01), Defosse

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