Bridgman–Stockbarger technique

The Bridgman -Stockbarger method ( after the physicist Percy Williams Bridgman and Donald C. Stock Barger ) is a method for drawing large single crystals, such as silicon or gallium arsenide.


For the process of a horizontally split furnace is used. The temperature distribution is in the upper region above the melting temperature of the components and in the lower region below. By lowering connected to a rotary movement of the melt contained in a crucible, the melt is crystallized in the transition from the lower region of the furnace.

The special feature of this method is the construction of the crucible: At the bottom of the crucible in which the melt solidifies first, there is a constriction. The melt below this restriction frozen polycrystalline, however, a single crystal grows by the narrowing further in that the remaining melt, which then serves as a seed. The remaining melt solidifies in the transition zone of the furnace at this germ and takes its orientation to complete.