| 摘要 |
995,399. Zone-melting. DOW CORNING CORPORATION. Dec. 4, 1963 [Jan. 8, 1963], No. 47918/63. Heading B1S. A monocrystalline rod of silicon having a diameter of at least 1# inches is produced by floating zone-melting using a planar induction coil 52, Figs. 2 and 3, having an electrically conductive split ring 54 brazed or hard soldered at 56 to the inside of the turn of the coil having the smallest diameter. The coil may be an internally cooled hollow silver tube and the split ring may be of silver or platinum. A thick rod 32 may be produced from a thin rod, Fig. 4. The two ends of the rod being zone-melted may be rotated in opposite, directions. The zone-melting may be effected in an externally cooled evacuated chamber.
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