C - Chemistry – Metallurgy – 30 – B
Patent
C - Chemistry, Metallurgy
30
B
C30B 15/30 (2006.01) C30B 15/00 (2006.01)
Patent
CA 2369962
The object of the present invention is to provide an apparatus and a method to enable a seed crystal to be directed to the precise location of a melt for growing a ribbon-shaped crystal, but after the crystal has commenced growing, the ribbon-shaped crystal is continuously pulled up so as to produce a longitudinally extending crystal using a continuous pulling device. The method for producing a ribbon-shaped crystal comprises growing a ribbon-shaped crystal on a seed crystal using a linear pulling device for pulling the seed crystal and a crystal growing at the end of the seed crystal in a vertical direction, and continuing to pull the ribbon-shaped crystal by using a continuous pulling device having a continuous pulling mechanism. The apparatus for continuous production of a ribbon-shaped crystal comprises a linear pulling device for linear vertical pulling of a seed crystal and a ribbon-shaped crystal grown on the seed crystal; a continuous pulling device for pulling the crystal continuously by clamping a portion of the ribbon-shaped crystal; a switching device for changing pulling device from the linear pulling device to the continuous pulling device when the seed crystal has passed through the continuous pulling device; and a crystal cutting device for severing the seed crystal from the grown ribbon--shaped crystal.
Cette invention concerne un procédé permettant de tirer un cristal, lequel procédé permet d'abaisser un cristal germe avec précision en une position donnée dans un liquide en fusion lorsque l'on commence à faire croître un cristal, et de le tirer en continu dès que commence la croissance. Cette invention concerne également un dispositif prévu à cet effet. Le dispositif permettant de tirer un cristal en continu se caractérise en ce qu'il comprend un dispositif de traction linéaire (30) qui va tirer dans une direction verticale un cristal germe (12) et un cristal de type ruban (16) que l'on a fait pousser à la pointe dudit cristal germe. Le dispositif décrit dans cette invention comprend également un mécanisme de traction (40) qui va agripper et tirer continuellement le cristal de type ruban, ainsi qu'un mécanisme de commutation qui va assurer la commutation en traction continue par le mécanisme de traction (40) une fois que le cristal germe tiré par le dispositif de traction (30) a dépassé le mécanisme de traction (40). Ce dispositif comprend enfin un mécanisme de coupe (39) permettant de couper et de séparer le cristal germe (12) et le cristal de type ruban (16).
Fujita Kentaro
Isozaki Hideyuki
Satoh Iwao
Terao Kenji
Ebara Corporation
Riches Mckenzie & Herbert Llp
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