Apparatus for positioning and locating a baffle plate in a cruci

Details Apparatus for positioning and locating a baffle plate in a cruci Apparatus for positioning and locating a baffle plate in a cruci

1984-11-27

1986-08-05

Lindsay, Robert

Chemical apparatus and process disinfecting, deodorizing, preser

Elements or adjuncts

156617SP, 156DIG98, 422249, 310 905, B01D 900

Patent

active

046042628

ABSTRACT:
In pulling a single crystal of a compound semiconductor having a high melting point and exhibiting a high dissociation pressure at such melting point, like a compound semiconductor of elements of Groups III-V such as GaAs or GaP, from a feed melt contained in a crucible and subject to an inert gas atmosphere of a high pressure, apparatus for positioning a baffle plate floating in the feed melt in a predetermined position in a stable state in order to prevent heat convection of the feed melt in the crucible from affecting the solid-melt interface and consequently a single crystal having a small dislocation density can be obtained.

REFERENCES:
patent: 4167554 (1979-09-01), Fisher
patent: 4284605 (1981-08-01), Pierrat
patent: 4310492 (1982-01-01), Nakamishi et al.
patent: 4497777 (1985-02-01), Kojima

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