





Polysilicon is the starting material for the production of wafers for the electronics- and photovoltaics industries.
The monosilane based polysilicon production process developed by SCHMID Silicon Technology (SST) features highest purity at low cost. The material is suitable for the production of multi-crystalline, mono-crystalline (CZ) and Float Zone (FZ) wafers.
Innovative steps lead from metallurgical grade silicon to polysilicon. In the SST monosilane process for production of polysilicon, recycling of intermediate products such as TCS and hydrogen is achieved by closed loops. The process is structured in a straight-forward way, consisting of three main production units:
All units and therefore the entire SST process is characterized by lowest energy and feedstock consumption and thus resulting in lowest operation cost.
The high level of purity enables application of the polysilicon for the solar industry, as well as for all applications in the electronics industry.
Low Pressure Hydrochlorination
One Step Disproportionation
Monosilane Chemical Vapor Deposition
Entire process