Patents by Inventor Rajesh Rengarajan

Rajesh Rengarajan 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: 9355887
    Abstract: The present invention provides a semiconductor structure in which different types of devices are located upon a specific crystal orientation of a hybrid substrate that enhances the performance of each type of device. In the semiconductor structure of the present invention, a dual trench isolation scheme is employed whereby a first trench isolation region of a first depth isolates devices of different polarity from each other, while second trench isolation regions of a second depth, which is shallower than the first depth, are used to isolate devices of the same polarity from each other. The present invention further provides a dual trench semiconductor structure in which pFETs are located on a (110) crystallographic plane, while nFETs are located on a (100) crystallographic plane. In accordance with the present invention, the devices of different polarity, i.e., nFETs and pFETs, are bulk-like devices.
    Type: Grant
    Filed: January 12, 2012
    Date of Patent: May 31, 2016
    Assignee: GLOBALFOUNDRIES INC.
    Inventors: Victor Chan, Meikei Ieong, Rajesh Rengarajan, Alexander Reznicek, Chun-yung Sung, Min Yang
  • Publication number: 20120104511
    Abstract: The present invention provides a semiconductor structure in which different types of devices are located upon a specific crystal orientation of a hybrid substrate that enhances the performance of each type of device. In the semiconductor structure of the present invention, a dual trench isolation scheme is employed whereby a first trench isolation region of a first depth isolates devices of different polarity from each other, while second trench isolation regions of a second depth, which is shallower than the first depth, are used to isolate devices of the same polarity from each other. The present invention further provides a dual trench semiconductor structure in which pFETs are located on a (110) crystallographic plane, while nFETs are located on a (100) crystallographic plane. In accordance with the present invention, the devices of different polarity, i.e., nFETs and pFETs, are bulk-like devices.
    Type: Application
    Filed: January 12, 2012
    Publication date: May 3, 2012
    Applicant: International Business Machines Corporation
    Inventors: Victor Chan, Meikei Ieong, Rajesh Rengarajan, Alexander Reznicek, Chun-yung Sung, Min Yang
  • Patent number: 8097516
    Abstract: The present invention provides a semiconductor structure in which different types of devices are located upon a specific crystal orientation of a hybrid substrate that enhances the performance of each type of device. In the semiconductor structure of the present invention, a dual trench isolation scheme is employed whereby a first trench isolation region of a first depth isolates devices of different polarity from each other, while second trench isolation regions of a second depth, which is shallower than the first depth, are used to isolate devices of the same polarity from each other. The present invention further provides a dual trench semiconductor structure in which pFETs are located on a (110) crystallographic plane, while nFETs are located on a (100) crystallographic plane. In accordance with the present invention, the devices of different polarity, i.e., nFETs and pFETs, are bulk-like devices.
    Type: Grant
    Filed: July 9, 2008
    Date of Patent: January 17, 2012
    Assignee: International Business Machines Corporation
    Inventors: Victor Chan, Meikei Ieong, Rajesh Rengarajan, Alexander Reznicek, Chun-yung Sung, Min Yang
  • Patent number: 7943486
    Abstract: The present invention provides a semiconductor material that has enhanced electron and hole mobilities that comprises a Si-containing layer having a <110> crystal orientation and a biaxial compressive strain. The term “biaxial compressive stress” is used herein to describe the net stress caused by longitudinal compressive stress and lateral stress that is induced upon the Si-containing layer during the manufacturing of the semiconductor material. Other aspect of the present invention relates to a method of forming the semiconductor material of the present invention. The method of the present invention includes the steps of providing a silicon-containing <110> layer; and creating a biaxial strain in the silicon-containing <110> layer.
    Type: Grant
    Filed: May 6, 2008
    Date of Patent: May 17, 2011
    Assignee: International Business Machines Corporation
    Inventors: Victor Chan, Massimo V. Fischetti, John M. Hergenrother, Meikei Ieong, Rajesh Rengarajan, Alexander Reznicek, Paul M. Solomon, Chun-yung Sung, Min Yang
  • Patent number: 7883948
    Abstract: Methods and structures for relieving stresses in stressed semiconductor liners. A stress liner that enhances performance of either an NFET or a PFET is deposited over a semiconductor to cover the NFET and PFET. A disposable layer is deposited to entirely cover the stress liner, NFET and PFET. This disposable layer is selectively recessed to expose only the single stress liner over a gate of the NFET or PFET that is not enhanced by such stress liner, and then this exposed liner is removed to expose a top of such gate. Remaining portions of the disposable layer are removed, thereby enhancing performance of either the NFET or PFET, while avoiding degradation of the NFET or PFET not enhanced by the stress liner. The single stress liner is a tensile stress liner for enhancing performance of the NFET, or it is a compressive stress liner for enhancing performance of the PFET.
    Type: Grant
    Filed: May 14, 2009
    Date of Patent: February 8, 2011
    Assignee: International Business Machines Corporation
    Inventors: Brian J. Greene, Rajesh Rengarajan
  • Publication number: 20090236640
    Abstract: Methods and structures for relieving stresses in stressed semiconductor liners. A stress liner that enhances performance of either an NFET or a PFET is deposited over a semiconductor to cover the NFET and PFET. A disposable layer is deposited to entirely cover the stress liner, NFET and PFET. This disposable layer is selectively recessed to expose only the single stress liner over a gate of the NFET or PFET that is not enhanced by such stress liner, and then this exposed liner is removed to expose a top of such gate. Remaining portions of the disposable layer are removed, thereby enhancing performance of either the NFET or PFET, while avoiding degradation of the NFET or PFET not enhanced by the stress liner. The single stress liner is a tensile stress liner for enhancing performance of the NFET, or it is a compressive stress liner for enhancing performance of the PFET.
    Type: Application
    Filed: May 14, 2009
    Publication date: September 24, 2009
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Brian J. Greene, Rajesh Rengarajan
  • Patent number: 7572689
    Abstract: Methods and structures for relieving stresses in stressed semiconductor liners. A stress liner that enhances performance of either an NFET or a PFET is deposited over a semiconductor to cover the NFET and PFET. A disposable layer is deposited to entirely cover the stress liner, NFET and PFET. This disposable layer is selectively recessed to expose only the single stress liner over a gate of the NFET or PFET that is not enhanced by such stress liner, and then this exposed liner is removed to expose a top of such gate. Remaining portions of the disposable layer are removed, thereby enhancing performance of either the NFET or PFET, while avoiding degradation of the NFET or PFET not enhanced by the stress liner. The single stress liner is a tensile stress liner for enhancing performance of the NFET, or it is a compressive stress liner for enhancing performance of the PFET.
    Type: Grant
    Filed: November 9, 2007
    Date of Patent: August 11, 2009
    Assignee: International Business Machines Corporation
    Inventors: Brian J. Greene, Rajesh Rengarajan
  • Publication number: 20090121295
    Abstract: Methods and structures for relieving stresses in stressed semiconductor liners. A stress liner that enhances performance of either an NFET or a PFET is deposited over a semiconductor to cover the NFET and PFET. A disposable layer is deposited to entirely cover the stress liner, NFET and PFET. This disposable layer is selectively recessed to expose only the single stress liner over a gate of the NFET or PFET that is not enhanced by such stress liner, and then this exposed liner is removed to expose a top of such gate. Remaining portions of the disposable layer are removed, thereby enhancing performance of either the NFET or PFET, while avoiding degradation of the NFET or PFET not enhanced by the stress liner. The single stress liner is a tensile stress liner for enhancing performance of the NFET, or it is a compressive stress liner for enhancing performance of the PFET.
    Type: Application
    Filed: November 9, 2007
    Publication date: May 14, 2009
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Brian J. Greene, Rajesh Rengarajan
  • Patent number: 7473607
    Abstract: A method of manufacturing a device includes doping a low voltage threshold area and a high voltage threshold area. Gate structures are formed over the low voltage threshold and high voltage threshold areas while protecting the gate structure over the low voltage threshold area. A silicidation process is performed over the high voltage threshold area while the gate structure over the low voltage threshold area remains protected. Siliciding includes depositing metal on the gate of the high voltage threshold area and annealing the metal, the metal is deposited either by CVD or sputtering followed by anneal to fully suicide the gate structure of the high voltage threshold area. The metal, preferably cobalt or nickel is deposited to a thickness of approximately 500 ?, annealed for about 3 minutes at about 400° C.
    Type: Grant
    Filed: July 6, 2005
    Date of Patent: January 6, 2009
    Assignee: International Business Machines Corporation
    Inventors: Xiangdong Chen, Rajesh Rengarajan
  • Patent number: 7462525
    Abstract: The present invention provides a semiconductor material that has enhanced electron and hole mobilities that comprises a Si-containing layer having a <110> crystal orientation and a biaxial compressive strain. The term “biaxial compressive stress” is used herein to describe the net stress caused by longitudinal compressive stress and lateral stress that is induced upon the Si-containing layer during the manufacturing of the semiconductor material. Other aspect of the present invention relates to a method of forming the semiconductor material of the present invention. The method of the present invention includes the steps of providing a silicon-containing <110> layer; and creating a biaxial strain in the silicon-containing <110> layer.
    Type: Grant
    Filed: October 25, 2007
    Date of Patent: December 9, 2008
    Assignee: International Business Machines Corporation
    Inventors: Victor Chan, Massimo V. Fischetti, John M. Hergenrother, Meikei Ieong, Rajesh Rengarajan, Alexander Reznicek, Paul M. Solomon, Chun-yung Sung, Min Yang
  • Publication number: 20080290379
    Abstract: The present invention provides a semiconductor structure in which different types of devices are located upon a specific crystal orientation of a hybrid substrate that enhances the performance of each type of device. In the semiconductor structure of the present invention, a dual trench isolation scheme is employed whereby a first trench isolation region of a first depth isolates devices of different polarity from each other, while second trench isolation regions of a second depth, which is shallower than the first depth, are used to isolate devices of the same polarity from each other. The present invention further provides a dual trench semiconductor structure in which pFETs are located on a (110) crystallographic plane, while nFETs are located on a (100) crystallographic plane. In accordance with the present invention, the devices of different polarity, i.e., nFETs and pFETs, are bulk-like devices.
    Type: Application
    Filed: July 9, 2008
    Publication date: November 27, 2008
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Victor Chan, Meikei Ieong, Rajesh Rengarajan, Alexander Reznicek, Chun-yung Sung, Min Yang
  • Publication number: 20080206958
    Abstract: The present invention provides a semiconductor material that has enhanced electron and hole mobilities that comprises a Si-containing layer having a <110> crystal orientation and a biaxial compressive strain. The term “biaxial compressive stress” is used herein to describe the net stress caused by longitudinal compressive stress and lateral stress that is induced upon the Si-containing layer during the manufacturing of the semiconductor material. Other aspect of the present invention relates to a method of forming the semiconductor material of the present invention. The method of the present invention includes the steps of providing a silicon-containing <110> layer; and creating a biaxial strain in the silicon-containing <110> layer.
    Type: Application
    Filed: May 6, 2008
    Publication date: August 28, 2008
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Victor Chan, Massimo V. Fischetti, John M. Hergenrother, Meikei Ieong, Rajesh Rengarajan, Alexander Reznicek, Paul M. Solomon, Chun-yung Sung, Min Yang
  • Publication number: 20080044987
    Abstract: The present invention provides a semiconductor material that has enhanced electron and hole mobilities that comprises a Si-containing layer having a <110> crystal orientation and a biaxial compressive strain. The term “biaxial compressive stress” is used herein to describe the net stress caused by longitudinal compressive stress and lateral stress that is induced upon the Si-containing layer during the manufacturing of the semiconductor material. Other aspect of the present invention relates to a method of forming the semiconductor material of the present invention. The method of the present invention includes the steps of providing a silicon-containing <110> layer; and creating a biaxial strain in the silicon-containing <110> layer.
    Type: Application
    Filed: October 25, 2007
    Publication date: February 21, 2008
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Victor Chan, Massimo Fischetti, John Hergenrother, Meikei Ieong, Rajesh Rengarajan, Alexander Reznicek, Paul Solomon, Chun-yung Sung, Min Yang
  • Publication number: 20080044966
    Abstract: The present invention provides a semiconductor material that has enhanced electron and hole mobilities that comprises a Si-containing layer having a <110> crystal orientation and a biaxial compressive strain. The term “biaxial compressive stress” is used herein to describe the net stress caused by longitudinal compressive stress and lateral stress that is induced upon the Si-containing layer during the manufacturing of the semiconductor material. Other aspect of the present invention relates to a method of forming the semiconductor material of the present invention. The method of the present invention includes the steps of providing a silicon-containing <110> layer; and creating a biaxial strain in the silicon-containing <110> layer.
    Type: Application
    Filed: October 25, 2007
    Publication date: February 21, 2008
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Victor Chan, Massimo Fischetti, John Hergenrother, Meikei Ieong, Rajesh Rengarajan, Alexander Reznicek, Paul Solomon, Chun-yung Sung, Min Yang
  • Publication number: 20080036028
    Abstract: The present invention provides a semiconductor structure in which different types of devices are located upon a specific crystal orientation of a hybrid substrate that enhances the performance of each type of device. In the semiconductor structure of the present invention, a dual trench isolation scheme is employed whereby a first trench isolation region of a first depth isolates devices of different polarity from each other, while second trench isolation regions of a second depth, which is shallower than the first depth, are used to isolate devices of the same polarity from each other. The present invention further provides a dual trench semiconductor structure in which pFETs are located on a (110) crystallographic plane, while nFETs are located on a (100) crystallographic plane. In accordance with the present invention, the devices of different polarity, i.e., nFETs and pFETs, are bulk-like devices.
    Type: Application
    Filed: October 23, 2007
    Publication date: February 14, 2008
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Victor Chan, Meikei Ieong, Rajesh Rengarajan, Alexander Reznicek, Chun-yung Sung, Min Yang
  • Patent number: 7314790
    Abstract: The present invention provides a semiconductor material that has enhanced electron and hole mobilities that comprises a Si-containing layer having a <110> crystal orientation and a biaxial compressive strain. The term “biaxial compressive stress” is used herein to describe the net stress caused by longitudinal compressive stress and lateral stress that is induced upon the Si-containing layer during the manufacturing of the semiconductor material. Other aspect of the present invention relates to a method of forming the semiconductor material of the present invention. The method of the present invention includes the steps of providing a silicon-containing <110> layer; and creating a biaxial strain in the silicon-containing <110> layer.
    Type: Grant
    Filed: December 18, 2006
    Date of Patent: January 1, 2008
    Assignee: International Business Machines Corporation
    Inventors: Victor Chan, Massimo V. Fischetti, John M. Hergenrother, Meikei Ieong, Rajesh Rengarajan, Alexander Reznicek, Paul M. Solomon, Chun-yung Sung, Min Yang
  • Publication number: 20070099367
    Abstract: The present invention provides a semiconductor material that has enhanced electron and hole mobilities that comprises a Si-containing layer having a <110> crystal orientation and a biaxial compressive strain. The term “biaxial compressive stress” is used herein to describe the net stress caused by longitudinal compressive stress and lateral stress that is induced upon the Si-containing layer during the manufacturing of the semiconductor material. Other aspect of the present invention relates to a method of forming the semiconductor material of the present invention. The method of the present invention includes the steps of providing a silicon-containing <110> layer; and creating a biaxial strain in the silicon-containing <110> layer.
    Type: Application
    Filed: December 18, 2006
    Publication date: May 3, 2007
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Victor Chan, Massimo Fischetti, John Hergenrother, Meikei Ieong, Rajesh Rengarajan, Alexander Reznicek, Paul Solomon, Chun-yung Sung, Min Yang
  • Publication number: 20070040235
    Abstract: The present invention provides a semiconductor structure in which different types of devices are located upon a specific crystal orientation of a hybrid substrate that enhances the performance of each type of device. In the semiconductor structure of the present invention, a dual trench isolation scheme is employed whereby a first trench isolation region of a first depth isolates devices of different polarity from each other, while second trench isolation regions of a second depth, which is shallower than the first depth, are used to isolate devices of the same polarity from each other. The present invention further provides a dual trench semiconductor structure in which pFETs are located on a (110) crystallographic plane, while nFETs are located on a (100) crystallographic plane. In accordance with the present invention, the devices of different polarity, i.e., nFETs and pFETs, are bulk-like devices.
    Type: Application
    Filed: August 19, 2005
    Publication date: February 22, 2007
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Victor Chan, Meikei Ieong, Rajesh Rengarajan, Alexander Reznicek, Chun-yung Sung, Min Yang
  • Publication number: 20070020865
    Abstract: A method of manufacturing a device and the device. The device includes doping a low voltage threshold area and a high voltage threshold area. The method further includes forming gate structures over the low voltage threshold area and the high voltage threshold area and protecting the gate structure over the low voltage threshold area. A silicidation process is performed over the high voltage threshold area while the gate structure over the low voltage threshold area remains protected.
    Type: Application
    Filed: July 6, 2005
    Publication date: January 25, 2007
    Applicant: International Business Machines Corporation
    Inventors: Xiangdong Chen, Rajesh Rengarajan
  • Patent number: 7161169
    Abstract: The present invention provides a semiconductor material that has enhanced electron and hole mobilities that comprises a Si-containing layer having a <110> crystal orientation and a biaxial compressive strain. The term “biaxial compressive stress” is used herein to describe the net stress caused by longitudinal compressive stress and lateral stress that is induced upon the Si-containing layer during the manufacturing of the semiconductor material. Other aspect of the present invention relates to a method of forming the semiconductor material of the present invention. The method of the present invention includes the steps of providing a silicon-containing <110> layer; and creating a biaxial strain in the silicon-containing <110> layer.
    Type: Grant
    Filed: November 3, 2004
    Date of Patent: January 9, 2007
    Assignee: International Business Machines Corporation
    Inventors: Victor Chan, Massimo V. Fischetti, John M. Hergenrother, Meikei Leong, Rajesh Rengarajan, Alexander Reznicek, Paul M. Solomon, Chun-yung Sung, Min Yang