Patents by Inventor Ghavam Ghavami Shahidi

Ghavam Ghavami Shahidi 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).

  • Patent number: 9064717
    Abstract: A three dimensional device stack structure comprises two or more active device and interconnect layers further connected together using through substrate vias. Methods of forming the three dimensional device stack structure comprise alignment, bonding by lamination, thinning and post thinning processing. The via features enable the retention of alignment through the lamination process and any subsequent process steps thus achieving a mechanically more robust stack structure compared to the prior art.
    Type: Grant
    Filed: November 9, 2009
    Date of Patent: June 23, 2015
    Assignee: International Business Machines Corporation
    Inventors: Sampath Purushothaman, Mary E. Rothwell, Ghavam Ghavami Shahidi, Roy Rongqing Yu
  • Patent number: 8093099
    Abstract: A three dimensional device stack structure comprises two or more active device and interconnect layers further connected together using through substrate vias. Methods of forming the three dimensional device stack structure comprise alignment, bonding by lamination, thinning and post thinning processing. The via features enable the retention of alignment through the lamination process and any subsequent process steps thus achieving a mechanically more robust stack structure compared to the prior art.
    Type: Grant
    Filed: April 20, 2010
    Date of Patent: January 10, 2012
    Assignee: International Business Machines Corporation
    Inventors: Sampath Purushothaman, Mary E. Rothwell, Ghavam Ghavami Shahidi, Roy Rongqing Yu
  • Publication number: 20110111560
    Abstract: A three dimensional device stack structure comprises two or more active device and interconnect layers further connected together using through substrate vias. Methods of forming the three dimensional device stack structure comprise alignment, bonding by lamination, thinning and post thinning processing. The via features enable the retention of alignment through the lamination process and any subsequent process steps thus achieving a mechanically more robust stack structure compared to the prior art.
    Type: Application
    Filed: November 9, 2009
    Publication date: May 12, 2011
    Applicant: International Business Machines Corporation
    Inventors: Sampath Purushothaman, Mary E. Rothwell, Ghavam Ghavami Shahidi, Roy Rongging Yu
  • Patent number: 7855455
    Abstract: A three dimensional device stack structure comprises two or more active device and interconnect layers further connected together using through substrate vias. Methods of forming the three dimensional device stack structure comprise alignment, bonding by lamination, thinning and post thinning processing. The via features enable the retention of alignment through the lamination process and any subsequent process steps thus achieving a mechanically more robust stack structure compared to the prior art.
    Type: Grant
    Filed: September 26, 2008
    Date of Patent: December 21, 2010
    Assignee: International Business Machines Corporation
    Inventors: Sampath Purushothaman, Mary E. Rothwell, Ghavam Ghavami Shahidi, Roy Rongqing Yu
  • Publication number: 20100200992
    Abstract: A three dimensional device stack structure comprises two or more active device and interconnect layers further connected together using through substrate vias. Methods of forming the three dimensional device stack structure comprise alignment, bonding by lamination, thinning and post thinning processing. The via features enable the retention of alignment through the lamination process and any subsequent process steps thus achieving a mechanically more robust stack structure compared to the prior art.
    Type: Application
    Filed: April 20, 2010
    Publication date: August 12, 2010
    Applicant: International Business Machines Corporation
    Inventors: Sampath Purushothaman, Mary E. Rothwell, Ghavam Ghavami Shahidi, Roy Rongqing Yu
  • Publication number: 20100078770
    Abstract: A three dimensional device stack structure comprises two or more active device and interconnect layers further connected together using through substrate vias. Methods of forming the three dimensional device stack structure comprise alignment, bonding by lamination, thinning and post thinning processing. The via features enable the retention of alignment through the lamination process and any subsequent process steps thus achieving a mechanically more robust stack structure compared to the prior art.
    Type: Application
    Filed: September 26, 2008
    Publication date: April 1, 2010
    Applicant: International Business Machines Corporation
    Inventors: Sampath Purushothaman, Mary E. Rothwell, Ghavam Ghavami Shahidi, Roy Rongqing Yu
  • Patent number: 6566177
    Abstract: A silicon on insulator (SOI) dynamic random access memory (DRAM) cell and array and method of manufacture. The memory cell includes a trench storage capacitor connected by a self aligned buried strap to a vertical access transistor. A buried oxide layer isolates an SOI layer from a silicon substrate. The trench capacitor is formed in the substrate and the access transistor is formed on a sidewall of the SOI layer. A polysilicon strap connected to the polysilicon plate of the storage capacitor provides a self-aligned contact to the source of the access transistor. Initially, the buried oxide layer is formed in the wafer. Deep trenches are etched, initially just through the SOI layer and the BOX layer. Protective sidewalls are formed in the trenches. Then, the deep trenches are etched into the substrate. The volume in the substrate is expanded to form a bottle shaped trench.
    Type: Grant
    Filed: October 25, 1999
    Date of Patent: May 20, 2003
    Assignee: International Business Machines Corporation
    Inventors: Carl J. Radens, Gary B. Bronner, Tze-chiang Chen, Bijan Davari, Jack A. Mandelman, Dan Moy, Devendra K. Sadana, Ghavam Ghavami Shahidi, Scott R. Stiffler
  • Patent number: 6426252
    Abstract: A silicon on insulator (SOI) dynamic random access memory (DRAM) cell, array and method of manufacture. The memory cell includes a vertical access transistor above a trench storage capacitor in a layered wafer. A buried oxide (BOX) layer formed in a silicon wafer isolates an SOI layer from a silicon substrate. Deep trenches are etched through the upper surface SOI layer, the BOX layer and into the substrate. Each trench capacitor is formed in the substrate and, the access transistor is formed on a sidewall of the SOI layer. Recesses are formed in the BOX layer at the SOI layer. A polysilicon strap recessed in the BOX layer connects each polysilicon storage capacitor plate to a self-aligned contact at the source of the access transistor. Dopant is implanted into the wafer to define device regions. Access transistor gates are formed along the SOI layer sidewalls. Shallow trenches are formed and filled with insulating material to isolate cells from adjacent cells.
    Type: Grant
    Filed: October 25, 1999
    Date of Patent: July 30, 2002
    Assignee: International Business Machines Corporation
    Inventors: Carl J. Radens, Gary B. Bronner, Tze-chiang Chen, Bijan Davari, Jack A. Mandelman, Dan Moy, Devendra K. Sadana, Ghavam Ghavami Shahidi, Scott R. Stiffler
  • Patent number: 6131182
    Abstract: A computer-based method automatically synthesizes, optimizes and compiles high performance control logic using SRCMOS LOGIC ARRAY MACROS, abbreviated as SLAMs.
    Type: Grant
    Filed: May 2, 1997
    Date of Patent: October 10, 2000
    Assignee: International Business Machines Corporation
    Inventors: Michael Patrick Beakes, Barbara Alana Chappell, Terry Ivan Chappell, Gary S. Ditlow, Barry Lee Dorfman, Bruce Martin Fleischer, Vinod Narayanan, Robert Alan Philhower, George Anthony Sai Halasz, Ghavam Ghavami Shahidi, David James Widiger