# Commercial Poly-Silicon Specifications

| Here are the specification for poly-silicon from one of the worlds largest suppliers, Wacker Siltronic as they appear in the Internet in Nov. 2000.
|  | Notice: The "w " or "a" behind the concentration denotes w eigth or atomic parts per m = million, b = billion , t = trillion.

| Here some productio information:
|  | According to "Solid State Technlogy" July 2005, the productio numbers are as follows: Total production 2005: 26.000.000 kg; about 2/3 for miocroelectronics, 1/3 for photovoltaics. Expected production 2006: 29.000.000 kg.
|  | Expected shortfalls: 2005: 4.000.000 kg 2006: 6.000.000 kg. 2007: 12.000.000 kg. 2008: 20.000 000 kg.
|  | The expected shortfalls result to a large extent from a growthrate of 30 % for photovoltaics and from technical and financial difficulties to crank up püroduction at a high reate. However, alternative processes solar Si production are expected to come on-line in 2006.

With frame

6.1.1 Materials and Processes for Silicon Technology

© H. Föll (Electronic Materials - Script)