| 摘要 |
In the passage of a molten zone upwards through a thick polycrystalline rod (4) from a thin monocrystalline rod (5) with simultaneous stretching, the molten zone (3) being produced by an induction coil (2) having an inner diameter between that of the thick and thin rods, an electrically heated radiation member (7) encircles the thin rod below the molten zone to effect annealing. The ratio of the two rods may be 1.5-7. The induction coil may be of flat or truncated cone form. |
