A process for zone-by-zone melting of a rod of semi-conductor material using an induction coil as the heating means and an automatic arrangement for controlling the current through the coil

摘要

In the passage of a molten zone through a rod of semi-conductor material using an induction heating coil, the current in the coil, and hence the diameter of the molten zone, is maintained constant by automatic variation in the distance between the two ends of the rod (see Group XXXV).