Patents by Inventor Farouk A. Hariri

Farouk A. Hariri 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).

  • Apparatus for growing silicon crystals
    Patent number: 5935327
    Abstract: An apparatus for producing silicon crystals (24) having highly uniform characteristics from a silicon melt (22) comprising a furnace (12), a crucible (14) disposed within the furnace (12) for containing the silicon melt (22), a heater (20) disposed around the crucible (14) for heating the silicon melt (22) and a pair of cusp magnets (28, 30) disposed around the furnace (12) and spaced a distance apart from one another such that the distance between the cusp magnets (28, 30) is variable.
    Type: Grant
    Filed: May 9, 1997
    Date of Patent: August 10, 1999
    Assignee: Texas Instruments Incorporated
    Inventors: Farouk A. Hariri, Michael D. Dangel, H. Michael Grimes
  • Spiral heater for use in czochralski crystal pullers
    Patent number: 5571320
    Abstract: The invention defines an apparatus for controlling oxygen content in Czochralski silicon crystal pullers in which silicon is melted in a quartz crucible. The apparatus includes a susceptor 10, a quartz crucible 12 in said susceptor, a cable 16 for lowering a seed crystal 14 into silicon melted in said crucible, and a combination spiral heater/magnetic coil 25 for heating and melting silicon in said crucible, and for producing a magnetic field around the crucible.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: November 5, 1996
    Assignee: Texas Instruments Incorporated
    Inventors: H. Michael Grimes, Farouk A. Hariri
  • Radiation heat shield for silicon melt-in manufacturing of single crystal silicon
    Patent number: 5004519
    Abstract: The disclosure relates to a radiation heat shield which is formed of graphite which covers the open end of the crucible of a furnace for forming single crystals of silicon by the Czochralski method. The graphite preferably has a silicon carbide coating thereon. The heat shield is preferably formed in plural segments with a counterweight at one end of each of the segments whereby, upon raising of the crucible, the segments and associated counterweight rotate about a pivot to expose the top of the crucible.
    Type: Grant
    Filed: September 12, 1988
    Date of Patent: April 2, 1991
    Assignee: Texas Instruments Incorporated
    Inventor: Farouk A. Hariri