Single-crystal – oriented-crystal – and epitaxy growth processes; – Apparatus – For crystallization from liquid or supercritical state
Patent
1993-03-19
1995-08-08
Breneman, R. Bruce
Single-crystal, oriented-crystal, and epitaxy growth processes;
Apparatus
For crystallization from liquid or supercritical state
C30B 1102, C30B 3500
Patent
active
054389534
ABSTRACT:
A crystal growth apparatus is herein disclosed, which comprises a vertical magnetic field-generating apparatus for establishing a cylindrical, vertical magnetic field space; a vertical Bridgman furnace arranged within the space; a base plate positioned above the magnetic field-generating apparatus; a heat-generating furnace comprising a water jacket, a quartz tube and a heating element; a combustion tube for accommodating a crucible at a predetermined position; a means for vertically suspending and supporting the combustion tube; a means for guiding the suspending means to move it up and down; and a means for driving the suspending means in the upward and downward directions such that the combustion tube is lowered and risen in the heat-generating furnace; the guide means and the driving means being fitted to the base plate; the heat-generating furnace being arranged at a predetermined position within the space and fitted to the base plate through a supporting member; and a motor of the driving means being placed at a position wherein the motor is not greatly affected by a magnetic field established by the magnetic field-generating apparatus.
REFERENCES:
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patent: 5135726 (1992-08-01), Min et al.
patent: 5248483 (1993-09-01), Carter
"Directional Solidification of Aluminum-Silicon Eutectic Alloy in a Magnetic Field," Journal of Crystal Growth, Y. Aoki et al, vol. 62, No. 1, (Jun. 1983), pp. 207-209.
Aoki Yoshihira
Kido Giyuu
Yamaguchi Hisashi
Breneman R. Bruce
Garrett Felisa
Mitsui Mining & Smelting Co. Ltd.
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