Patents by Inventor Thekkemadathil Rajeevakumar

Thekkemadathil Rajeevakumar 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).

  • Trench sidewall structure
    Patent number: 5521114
    Abstract: The invention provides a trench sidewall structure and a method of forming and using the same to reduce parasitic sidewall leakage through a trench sidewall, for example from bitline contact to storage node or from storage node to substrate. The method involves placing a polysilicon layer of the same polarity as that of the array well, along with a diffusion barrier layer such an titanium nitride, between the storage node poly and the oxide collar.
    Type: Grant
    Filed: December 10, 1993
    Date of Patent: May 28, 1996
    Assignee: International Business Machines Corporation
    Inventor: Thekkemadathil Rajeevakumar
  • Trench sidewall structure
    Patent number: 5283453
    Abstract: The invention provides a trench sidewall structure and a method of forming and using the same to reduce parasitic sidewall leakage through a trench sidewall, for example from bitline contact to storage node or from storage node to substrate. The method involves placing a polysilicon layer of the same polarity as that of the array well, along with a diffusion barrier layer such an titanium nitride, between the storage node poly and the oxide collar.
    Type: Grant
    Filed: October 2, 1992
    Date of Patent: February 1, 1994
    Assignee: International Business Machines Corporation
    Inventor: Thekkemadathil Rajeevakumar