| 摘要 |
1,175,449. Floating zone-melting. SIEMENS A.G, 12 June, 1967 [15 June, 1966], No. 27106/67. Heading B1S. In the floating zone-melting of a silicon rod attached to a seed using an induction coil, the coil is eccentrically disposed with respect to the supply rod and the recrystallized rod for at least part of the operation. The coil may be reciprocated by rectilinear or circular movement of its axis at e.g. 9 alternations per minute between maximum and minimum eccentricity. The speed of passage of the molten zone may be 2 mm/min. The recrystallized rod may be rotated at 20 rpm. The cross-sectional area of the seed may be up to one tenth that of the supply rod. In steady operation, the diameter of both the supply and recrystallized rods may be larger than that of the coil. The supply and recrystallized rods may be on the same axis (Fig. 2) or may be offset (Fig. 5). |
