| 摘要 |
1,208,617. Zone-melting, &c. ARTHUR D. LITTLE, Inc. 21 June, 1968 [14 July, 1967], No. 29831/68. Heading BIS. [Also in Division F2] The pulling rod 19 of a pulling head 10 for a crystal growing apparatus using the Czochralski, zone refining, or Verneuil process is axially and rotatably movable by independent drives (see Division F2), the pulling head being readily connectable to a vessel 16, e.g. a quartz tube, in which the process takes place, by means of an adaptor (58) (Fig. 7, not shown) which makes a sealed connection with the vessel. The rod 19 extends through a seal in the adaptor, and may comprises coaxial tubes through which a coolant is circulated (Fig. 9, not shown). Induction heating is used. Zone refining or floating zone crystal growing apparatus (Fig. 2, not shown) uses two pulling heads at opposite ends of the vessel. |
