Apparatus for crucible-free zone melting of semiconductor crysta

Details Apparatus for crucible-free zone melting of semiconductor crysta Apparatus for crucible-free zone melting of semiconductor crysta

1975-12-08

1976-12-07

Emery, Stephen J.

Chemistry: physical processes

Physical processes

Crystallization

156620, B01J 1710

Patent

active

039960110

ABSTRACT:
Polycrystalline semiconductor rods are converted to dislocation-free monocrystal rods by positioning a polycrystalline rod within a crucible-free zone melt environment with a seed crystal attached to one end thereof, generating a melt zone at the juncture of the seed crystal and the polycrystalline rod, controllably moving the melt zone away from the juncture and through the polycrystalline rod to a select point thereon, uniformly supporting the cone-shaped lower portion of the rod being processed so as to prevent oscillations and the like at the juncture of the rod in the seed crystal and controllably moving the melt zone from the select point to the remainder of the rod. A uniform support is preferably provided by an axially movable funnel-shaped casing which is attached to the seed crystal holding member and which, when moved into its operating position, is filled with a self-adjusting oscillation or vibration dampening means, such as molten metal, metal spheroids, quartz particles, sand, etc.

REFERENCES:
patent: 2876147 (1959-03-01), Kniepkamp
patent: 3210165 (1965-10-01), Van Run
patent: 3233984 (1966-02-01), Erdman
patent: 3235339 (1966-02-01), Brunet
patent: 3498846 (1970-03-01), Keller
patent: 3781209 (1973-12-01), Reuschel
Lehovec, The Rev. of Scientific Instru., vol. 24, No. 8, Aug. 1953, pp. 652-655, Copy 23-2735p.

Affiliated with

Also associated with

Rating

Apparatus for crucible-free zone melting of semiconductor crysta does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus for crucible-free zone melting of semiconductor crysta, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for crucible-free zone melting of semiconductor crysta will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-376826