Chemical apparatus and process disinfecting – deodorizing – preser – Chemical reactor – Including specific material of construction
Patent
1987-09-01
1990-01-16
Doll, John
Chemical apparatus and process disinfecting, deodorizing, preser
Chemical reactor
Including specific material of construction
156607, 1566171, 1566191, 156DIG83, 1566181, C30B 1530
Patent
active
048942065
ABSTRACT:
The present invention discloses a crystal pulling apparatus having a double-crucible structure, wherein an inner crucible is located in an outer crucible. An end of a pipe-like passage is located in a through hole formed in a side wall of an inner crucible located in an outer crucible, and a melt is supplied from the outer crucible to the inner crucible through the pipe-like passage, during crystal pulling. During melting or neckdown, prior to crystal pulling, diffusion of an impurity between the melts in the outer crucible and the inner crucible, and exchange of the melts between the outer crucible and the inner crucible are prevented by the pipe-like passage.
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Kojima Masakatu
Matsushita Yoshiaki
Ogino Masanobu
Yamashita Youji
Doll John
Kabushiki Kaisha Toshiba
Kunemund Robert M.
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