Polysilicon Processing

Spang Power Electronics is a manufacturer of custom power equipment installed throughout the Polysilicon Processing Industry for the conversion of polysilicon feedstock into ingots. Spang’s expertise in power control and conversion has helped us become a global leader for the following applications.

Mono-Crystalline Furnaces

These furnaces, also known as “crystal pullers,” produce single-crystal ingots utilizing the CZ (Czochralski) method of crystal growing. The silicon is first melted in the crucible section of the furnace. The crystal is then grown by placing a “seed” crystal into the molten material. The “seed” is then drawn slowly up from the material and expands in size as the crystallization process continues. The seed sets the pattern for the growing crystal resulting in a large cylindrical crystal called an ingot. The final ingot will be further processed and cut into thin wafers which are used for semiconductors and solar cells.

Spang Power Electronics provides SCR Controllers, Transformers, and Power Systems to provide highly accurate controlled power melt the silicon and optimize the temperature for the crystal pulling process.

Multi-Crystalline Furnaces

These specialized furnaces melt the raw polysilicon feedstock and further cast multi-crystalline ingots. These ingots are then further processed, sliced, for use in the solar industry for solar cells.

Spang Power Electronics provides SCR Controllers, Transformers, and Power Systems to provide highly accurate controlled power to manage the melting and casting process.