You searched for: “float zone process
float-zone process, foat zone process, floatzone process
A method of growing a large-size, high-quality crystal whereby coils heat a polycrystalline ingot placed on top of a single-crystal seed.

As the coils are slowly raised the molten interface beneath the coils becomes single crystal.

This entry is located in the following unit: Photovoltaic Conversion Efficiency Terms + (page 9)