Single-crystal – oriented-crystal – and epitaxy growth processes; – Processes of growth from liquid or supercritical state – Having pulling during growth
Patent
1999-10-14
2000-08-22
Hiteshew, Felisa
Single-crystal, oriented-crystal, and epitaxy growth processes;
Processes of growth from liquid or supercritical state
Having pulling during growth
117248, 117911, C30B 1520
Patent
active
061066117
ABSTRACT:
A seed chuck for supporting a seed crystal for dipping in a hot melt has a main body including a dipping support formation for connection to a dipping apparatus and a seed support formation for supporting a seed crystal. A shield is coupled to the main body that insulates the seed crystal from cooling and heats the seed crystal with radiant energy emitted from the hot melt. The shield can be in the form of an insulating layer disposed against or inside of a portion of the seed chuck. In this case, the seed crystal is insulated from the cooler seed chuck and allowed to be warmed by the hot melt. The shield can also be a removable flange extending outwardly from the seed chuck and having an inverted cup shape or parabolic umbrella shape. In this case, the shield prevents cooling external gas flow from reaching the seed crystal while capturing and directing heat radiating from the hot melt onto the seed crystal. A method of warming the seed crystal during a growth process in which the a portion of the seed crystal is dipped in a hot melt includes providing a hot melt consisting of a molten mass of material, supporting the seed crystal in a seed chuck for selectively lowering the seed crystal into the hot melt, and warming the seed crystal supported in the seed chuck by using heat radiating from the hot melt and by insulating the seed crystal from external cooling forces.
REFERENCES:
patent: 4738832 (1988-04-01), Drechseh
patent: 5759261 (1998-06-01), Dornberger et al.
E. Mendel et al., "Seed Holder for Crystal Growth", IBM Technical Disclosure Bulletin, Oct. 1974, vol. 17, No. 5, p. 1353.
Aydelott Richard M.
Groat Clifford W.
Hiteshew Felisa
SEH-America, Inc.
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