Tribromosilane

Tribromosilane is a chemical compound containing silicon, hydrogen, and bromine. At high temperatures, it decomposes to produce silicon, and is an alternative to purified trichlorosilane of ultrapure silicon in the semiconductor industry.

Tribromosilane
Names
IUPAC name
Tribromosilane
Other names
Silicobromoform; Tribromomonosilane
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.029.250
UNII
Properties
Br3HSi
Molar mass 268.805 g·mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

The Schumacher Process of silicon deposition uses tribromosilane gas to produce polysilicon, but it has a number of cost and safety advantages over the Siemens Process to make polysilicon.[1]

It may be prepared by heating crystalline silicon with gaseous hydrogen bromide at high temperature.[2] It spontaneously combusts when exposed to air.[3]

References
  1. The Schumacher Process
  2. Schumb WC, Young RC (April 1930). "A study of the reaction of hydrogen bromide with silicon". Journal of the American Chemical Society. 52 (4): 1464–1469. doi:10.1021/ja01367a025.
  3. Schumb WC (December 1942). "The Halides and Oxyhalides of Silicon". Chemical Reviews. 31 (3): 587–595. doi:10.1021/cr60100a004.
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