Patents by Inventor Gianfranco Ghetti

Gianfranco Ghetti has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Processes for the purification of trichlorosilane or silicon tetrachloride
    Patent number: 8691055
    Abstract: The present disclosure relates to processes and systems for purifying technical grade trichlorosilane and/or technical grade silicon tetrachloride into electronic grade trichlorosilane and/or electronic grade silicon tetrachloride.
    Type: Grant
    Filed: September 7, 2012
    Date of Patent: April 8, 2014
    Assignee: MEMC Electronic Materials SpA
    Inventor: Gianfranco Ghetti
  • Process and System for the Purification of Trichlorosilane and Silicon Tetrachloride
    Publication number: 20120325645
    Abstract: The invention concerns a process (and a corresponding plant) for the purification of trichlorosilane and/or silicon tetrachloride comprising the following steps of treating technical grade trichlorosilane and/or technical grade silicon tetrachloride: complexation of the boron impurities (trichloride (BCl3)) and other metallic impurities by addition of diphenylthiocarbazone and/or triphenylchloromethane, with the formation of complex macromolecules having high boiling point, first column distillation of the complexation step products, wherein the complexed boron impurities, together with other metallic impurities are removed as bottoms, and second column distillation of the tops of the previous distillation, wherein electronic grade trichlorosilane (plus dichlorosilane possible present); and/or silicon tetrachloride are obtained as tops and phosphorus chlorides (PCl3) and phosphorus containing compounds, arsenic chlorides (AsCl3) and arsenic containing compounds, aluminium compounds, antimony compounds and in
    Type: Application
    Filed: September 7, 2012
    Publication date: December 27, 2012
    Applicant: MEMC ELECTRONIC MATERIALS S.P.A.
    Inventor: Gianfranco Ghetti
  • Process and system for the purification of trichlorosilane and silicon tetrachloride
    Patent number: 8282792
    Abstract: The present disclosure relates to processes and systems for purifying technical grade trichlorosilane and/or technical grade silicon tetrachloride into electronic grade trichlorosilane and/or electronic grade silicon tetrachloride.
    Type: Grant
    Filed: January 26, 2011
    Date of Patent: October 9, 2012
    Assignee: MEMC Electronic Materials S.p.A.
    Inventor: Gianfranco Ghetti
  • Process and System for the Purification of Trichlorosilane and Silicon Tetrachloride
    Publication number: 20110114469
    Abstract: The present disclosure relates to processes and systems for purifying technical grade trichlorosilane and/or technical grade silicon tetrachloride into electronic grade trichlorosilane and/or electronic grade silicon tetrachloride.
    Type: Application
    Filed: January 26, 2011
    Publication date: May 19, 2011
    Applicant: MEMC ELECTRONIC MATERIALS, S.P.A.
    Inventor: Gianfranco Ghetti
  • Processes for the purification of trichlorosilane and silicon tetrachloride
    Patent number: 7879198
    Abstract: The present disclosure relates to processes and systems for purifying technical grade trichlorosilane and/or technical grade silicon tetrachloride into electronic grade trichlorosilane and/or electronic grade silicon tetrachloride.
    Type: Grant
    Filed: November 14, 2005
    Date of Patent: February 1, 2011
    Assignee: MEMC Electronic Materials, Inc.
    Inventor: Gianfranco Ghetti
  • Process and SYSTEM for the Purification of Trichlorosilane and Silicon Tetrachloride
    Publication number: 20080314728
    Abstract: The invention concerns a process (and a corresponding plant) for the purification of trichlorosilane and/or silicon tetrachloride comprising the following steps of treating technical grade trichlorosilane and/or technical grade silicon tetrachloride: complexation of the boron impurities (trichloride BCI3) and other metallic impurities by addition of diphenylthiocarbazone and/or triphenylchloromethane, with the formation of complex macromolecules having high boiling point, first column distillation of the complexation step products, wherein the complexed boron impurities, together with other metallic impurities are removed as bottoms, and second column distillation of the tops of the previous distillation, wherein electronic grade trichlorosilane (plus dichlorosilane possible present) and/or silicon tetrachloride are obtained as tops and phosphorus chlorides PCI3 and phosphorus containing compounds, arsenic chlorides AsCI3 and arsenic containing compounds, aluminium compounds, antimony compounds and in general
    Type: Application
    Filed: November 14, 2005
    Publication date: December 25, 2008
    Applicant: MEMC ELECTRONIC MATERIALS, S.P.A.
    Inventor: Gianfranco Ghetti