Bridgman-Stockbarger method

Principle structure for the crystallization according to Bridgman and Stockbarger

The Bridgman-Stockbarger method (after the physicist Percy Williams Bridgman and Donald C. Stockbarger ) is a method for pulling large single crystals , for example silicon or gallium arsenide .

description

A horizontally divided furnace is used for the process. The temperature distribution is above the melting temperature of the components in the upper area and below it in the lower area. By lowering connected to a rotary movement of a crucible located melt , the melt is crystallized in the transition to the lower region of the furnace.

The special feature of this process is the structure of the crucible: at the lower end of the crucible, in which the melt first solidifies, there is a constriction. The melt below this constriction solidifies polycrystalline, but through the constriction a single crystal grows further into the remaining melt, which then serves as a nucleus . The remaining melt solidifies in the transition area of ​​the furnace on this nucleus and completely assumes its orientation.

See also

• Crystal growing
• Czochralski method
• Zone melting process

Web links

• The Bridgman-Stockbarger Method ( PDF file; 951 kB)
• Differences in crystal growing methods

Individual evidence

1. ↑ John N. Lalena, David A. Cleary, Everett Carpenter, Nancy F. Dean: Inorganic Materials Synthesis and Fabrication . Wiley-Interscience, 2008, ISBN 978-0-471-74004-9 , pp. 36 ff . ( limited preview in Google Book search).