Patents by Inventor F. Secco d'Aragona

F. Secco d'Aragona 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).

  • Method for control of oxygen in silicon crystals
    Patent number: 4545849
    Abstract: An improved process is disclosed for controlling the oxygen content of a Czochralski grown silicon crystal pulled from a silicon melt contained in a silica crucible. High, uniform oxygen concentrations are achieved by attaching an additional piece of silica to the inside of the crucible bottom. Preferably the additional silica is formed from a silica rod bent to a toroid shape. The toroid has about the diameter of the crystal being pulled and is located substantially coaxial with the growing crystal.
    Type: Grant
    Filed: March 3, 1983
    Date of Patent: October 8, 1985
    Assignee: Motorola Inc.
    Inventor: F. Secco d'Aragona