Preparation of hot-pressed silicon-germanium ingots: Part I — Chill casting of silicon-germanium alloys

Large chill cast ingots of silicon-germanium produced from melts that were not stirred contained two major alloys, one rich in silicon and one rich in germanium, in addition to a composition continuum. While stirring produced little change in distribution of Si/Ge ratios, inductive stirring did result in ingots that varied in composition but in a more uniform manner. In all cases, dopants were uniformly distributed throughout the cast ingots.