Abstract
The growth behavior in a conventional vertical Bridgman system was studied experimentally using gallium-doped germanium. The effects of varying modes of heat extraction from the seed end, the charge lowering rate, and the temperature distribution in the furnace on growth were investigated. It was found that the microscopic growth rate is transient at all times and that the growth interface remains concave into the solid. Initial transients follow a first order exponential rate law in most thermal configurations; extended configurational rate transients could be attributed to thermal end effects. The location of the control thermocouple was found to critically affect the growth behavior.
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