Patents by Inventor Srikanteswara Dakshina-Murthy

Srikanteswara Dakshina-Murthy 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: 8629535
    Abstract: A method of forming an integrated circuit includes providing a buffer layer comprising a dielectric material above a layer of conductive material and providing a layer of mask material above the buffer layer. The mask material comprises amorphous carbon. The method also includes removing a portion of the buffer layer and the layer of mask material to form a mask. A feature is formed in the layer of conductive material according to the mask.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: January 14, 2014
    Assignee: GlobalFoundries Inc.
    Inventors: Richard J. Huang, Scott A. Bell, Srikanteswara Dakshina-Murthy, Philip A. Fisher, Richard C. Nguyen, Cyrus E. Tabery, Lu You
  • Patent number: 8547521
    Abstract: The subject invention provides systems and methods that monitor and/or control turbulence of an immersion medium. The systems and methods relate to computer controlled techniques that reduce effects of immersion medium flow due to a liquid temperature gradient. According to an aspect of the subject invention, a number of temperature measurements of the immersion medium are obtained, and the temperature measurements are utilized to generate a gradient map of the immersion medium. By way of illustration, the temperature measurements can be made via wireless temperature sensors. The gradient map can be utilized to understand the stability of the immersion medium. According to an aspect of the subject invention, instability identified with the gradient map can be mitigated.
    Type: Grant
    Filed: December 1, 2004
    Date of Patent: October 1, 2013
    Assignee: Advanced Micro Devices, Inc.
    Inventors: Srikanteswara Dakshina-Murthy, Bhanwar Singh, Ramkumar Subramanian
  • Publication number: 20120007221
    Abstract: A method of forming an integrated circuit includes providing a buffer layer comprising a dielectric material above a layer of conductive material and providing a layer of mask material above the buffer layer. The mask material comprises amorphous carbon. The method also includes removing a portion of the buffer layer and the layer of mask material to form a mask. A feature is formed in the layer of conductive material according to the mask.
    Type: Application
    Filed: September 23, 2011
    Publication date: January 12, 2012
    Applicant: GLOBALFOUNDRIES Inc.
    Inventors: Richard J. Huang, Scott A. Bell, Srikanteswara Dakshina-Murthy, Philip A. Fisher, Richard C. Nguyen, Cyrus E. Tabery, Lu You
  • Patent number: 8007631
    Abstract: A system and method are provided to facilitate dual damascene interconnect integration with two imprint acts. The method provides for creation of a pair of translucent imprint molds containing the dual damascene pattern to be imprinted. The first imprint mold of the pair contains the via features of the dual damascene pattern and the second imprint mold of the pair contains the trench features. The via feature imprint mold is brought into contact with a first imaging layer deposited upon a first transfer layer which is deposited upon a dielectric layer of a substrate. The trench feature imprint mold is brought into contact with a second imaging layer deposited upon a second transfer layer which is deposited upon the first imaging layer of the substrate. When each imaging layer is exposed to a source of illumination, it cures with a structure matching the features of the corresponding imprint mold.
    Type: Grant
    Filed: April 30, 2007
    Date of Patent: August 30, 2011
    Assignee: Advanced Micro Devices, Inc.
    Inventors: Srikanteswara Dakshina-Murthy, Bhanwar Singh, Ramkumar Subramanian
  • Patent number: 7915160
    Abstract: Methods are provided for forming contacts for a semiconductor device. The methods may include depositing various materials, such as polysilicon, nitride, oxide, and/or carbon materials, over the semiconductor device. The methods may also include forming a contact hole and filling the contact hole to form the contact for the semiconductor device.
    Type: Grant
    Filed: January 19, 2007
    Date of Patent: March 29, 2011
    Assignee: GlobalFoundries Inc.
    Inventors: Cyrus E. Tabery, Srikanteswara Dakshina-Murthy, Chih-Yuh Yang, Bin Yu
  • Patent number: 7795046
    Abstract: Various apparatus and methods of monitoring endcap pullback are disclosed. In one aspect, an apparatus is provided that includes a substrate that has a plurality of semiconductor regions. Each of the plurality of semiconductor regions has a border with an insulating structure. A transistor is positioned in each of the plurality of semiconductor regions. Each of the transistors includes a gate that has a first lateral dimension and an end that has a position relative to its border. A voltage source is electrically coupled to the transistors whereby levels of currents flowing through the transistors are indicative of the positions of the ends of the gates relative to their borders.
    Type: Grant
    Filed: May 18, 2007
    Date of Patent: September 14, 2010
    Assignee: Advanced Micro Devices, Inc.
    Inventors: Srikanteswara Dakshina-Murthy, Chew Hoe Ang
  • Patent number: 7737021
    Abstract: The present invention is directed to a method of forming semiconductor devices. In one illustrative embodiment, the method comprises defining a photoresist feature having a first size in a layer of photoresist that is formed above a layer of dielectric material. The method further comprises reducing the first size of the photoresist feature to produce a reduced size photoresist feature, forming an opening in the layer of dielectric material under the reduced size photoresist feature, and forming a conductive material in the opening in the layer of dielectric material.
    Type: Grant
    Filed: September 30, 2002
    Date of Patent: June 15, 2010
    Assignee: Globalfoundries Inc.
    Inventors: Srikanteswara Dakshina-Murthy, Paul R. Besser, Jonathan B. Smith, Eric M. Apelgren, Christian Zistl, Jeremy I. Martin, Lie Larry Zhao, Nicholas John Kepler
  • Patent number: 7709373
    Abstract: A system and method are provided to facilitate dual damascene interconnect integration in a single imprint step. The method provides for creation of a translucent imprint mold with three-dimensional features comprising the dual damascene pattern to be imprinted. The imprint mold is brought into contact with a photopolymerizable organosilicon imaging layer deposited upon a transfer layer which is spin coated or otherwise deposited upon a dielectric layer of a substrate. When the photopolymerizable layer is exposed to a source of illumination, it cures with a structure matching the dual damascene pattern of the imprint mold. A halogen breakthrough etch followed by oxygen transfer etch transfer the vias from the imaging layer into the transfer layer. A second halogen breakthrough etch followed by a second oxygen transfer etch transfer the trenches from the imaging layer into the transfer layer. A dielectric etch transfers the pattern from the transfer layer into the dielectric layer.
    Type: Grant
    Filed: October 26, 2006
    Date of Patent: May 4, 2010
    Assignee: Advanced Micro Devices, Inc.
    Inventors: Srikanteswara Dakshina-Murthy, Bhanwar Singh, Khoi A Phan
  • Publication number: 20100047985
    Abstract: Methods are provided for fabricating a MOS transistor having self-aligned stressor and extension regions. A method comprises forming a gate stack overlying a layer of semiconductor material and forming a spacer about sidewalls of the gate stack. The method further comprises forming cavities in the layer of semiconductor material, wherein the cavities are substantially aligned with the spacer. The method further comprises forming a stress-inducing semiconductor material in the cavities, and implanting ions of a conductivity-determining impurity type into the stress-inducing semiconductor material using the gate stack and the spacer as an implantation mask.
    Type: Application
    Filed: August 19, 2008
    Publication date: February 25, 2010
    Applicant: ADVANCED MICRO DEVICES, INC.
    Inventors: Srikanteswara DAKSHINA MURTHY, Martin GERHARDT
  • Patent number: 7604903
    Abstract: A mask is provided to be used with nanoprint lithography processes to facilitate reproduction of small features required for the production of integrated circuits. A translucent substrate is provided along with one or more three-dimensional features that include one or more vertical sidewalls. An absorbing material is deposited upon one or more of the vertical sidewalls so that light in an incident direction to an upper surface of the substrate will be absorbed by the absorbing material, resulting in light blocking features. One or more horizontal surfaces are formed upon one or more of the three-dimensional features, which allow light rays to exit a lower surface of the substrate unobstructed by the absorbing material.
    Type: Grant
    Filed: January 30, 2004
    Date of Patent: October 20, 2009
    Assignee: Advanced Micro Devices, Inc.
    Inventors: Bhanwar Singh, Srikanteswara Dakshina-Murthy, Khoi A. Phan, Bharath Rangarajan, Ramkumar Subramanian
  • Patent number: 7521304
    Abstract: A method of forming an integrated circuit includes providing a buffer layer comprising a dielectric material above a layer of conductive material and providing a layer of mask material above the buffer layer. The mask material comprises amorphous carbon. The method also includes removing a portion of the buffer layer and the layer of mask material to form a mask. A feature is formed in the layer of conductive material according to the mask.
    Type: Grant
    Filed: August 29, 2002
    Date of Patent: April 21, 2009
    Assignee: Advanced Micro Devices, Inc.
    Inventors: Richard J. Huang, Scott A. Bell, Srikanteswara Dakshina-Murthy, Philip A. Fisher, Richard C. Nguyen, Cyrus E. Tabery, Lu You
  • Publication number: 20080283878
    Abstract: Various apparatus and methods of monitoring endcap pullback are disclosed. In one aspect, an apparatus is provided that includes a substrate that has a plurality of semiconductor regions. Each of the plurality of semiconductor regions has a border with an insulating structure. A transistor is positioned in each of the plurality of semiconductor regions. Each of the transistors includes a gate that has a first lateral dimension and an end that has a position relative to its border. A voltage source is electrically coupled to the transistors whereby levels of currents flowing through the transistors are indicative of the positions of the ends of the gates relative to their borders.
    Type: Application
    Filed: May 18, 2007
    Publication date: November 20, 2008
    Inventors: Srikanteswara Dakshina-Murthy, Chew Hoe Ang
  • Patent number: 7449348
    Abstract: The present invention relates generally to photolithographic systems and methods, and more particularly to systems and methodologies that facilitate compensating for retrograde feature profiles on an imprint mask. An aspect of the invention generates feedback information that facilitates control of imprint mask feature profile via employing a scatterometry system to detect retrograde feature profiles, and mitigating the retrograde profiles via a spacer etchback procedure.
    Type: Grant
    Filed: June 2, 2004
    Date of Patent: November 11, 2008
    Assignee: Advanced Micro Devices, Inc.
    Inventors: Srikanteswara Dakshina-Murthy, Bhanwar Singh, Ramkumar Subramanian, Khoi A. Phan
  • Patent number: 7432558
    Abstract: A semiconductor device may include a substrate and an insulating layer formed on the substrate. A fin may be formed on the insulating layer. The fin may include a side surface and a top surface, and the side surface may have a <100> orientation. A first gate may be formed on the insulating layer proximate to the side surface of the fin.
    Type: Grant
    Filed: June 9, 2004
    Date of Patent: October 7, 2008
    Assignee: Advanced Micro Devices, Inc.
    Inventors: Shibly S. Ahmed, Judy Xilin An, Srikanteswara Dakshina-Murthy, Cyrus E. Tabery, Bin Yu
  • Patent number: 7405032
    Abstract: The present invention relates generally to photolithographic systems and methods, and more particularly to systems and methodologies that facilitate the reduction of line-edge roughness (LER) during gate formation in an integrated circuit. Systems and methods are disclosed for improving critical dimension (CD) of photoresist lines, comprising a non-lithographic shrink component that facilitates mitigating LER, and a trim etch component that facilitates achieving and/or restoring a target critical dimension.
    Type: Grant
    Filed: August 21, 2003
    Date of Patent: July 29, 2008
    Assignee: Advanced Micro Devices, Inc.
    Inventors: Gilles Amblard, Srikanteswara Dakshina-Murthy, Bhanwar Singh
  • Patent number: 7386162
    Abstract: The present invention relates generally to photolithographic systems and methods, and more particularly to systems and methodologies that facilitate compensating for imprint mask critical dimension error(s). An aspect of the invention generates feedback information that facilitates control of imprint mask critical dimension via employing a scatterometry system to detect imprint mask critical dimension error, and mitigating the error via a spacer etchback procedure.
    Type: Grant
    Filed: June 23, 2004
    Date of Patent: June 10, 2008
    Assignee: Advanced Micro Devices, Inc
    Inventors: Srikanteswara Dakshina-Murthy, Bhanwar Singh, Ramkumar Subramanian
  • Patent number: 7384569
    Abstract: Disclosed are photolithographic systems and methods, and more particularly systems and methodologies that enhance imprint mask feature resolution. An aspect generates feedback information that facilitates control of imprint mask feature size and resolution via employing a scatterometry system to detect resolution enhancement need, and decreasing imprint mask feature size and increasing resolution of the imprint mask via a trim etch procedure.
    Type: Grant
    Filed: August 2, 2004
    Date of Patent: June 10, 2008
    Assignee: Advanced Micro Devices, Inc.
    Inventors: Srikanteswara Dakshina-Murthy, Bhanwar Singh, Ramkumar Subramanian
  • Patent number: 7381278
    Abstract: Disclosed are immersion lithography methods involving irradiating a first photoresist through a lens and an immersion liquid, the immersion liquid contacting the lens and the first photoresist in a first apparatus; contacting the lens with a supercritical fluid in a second apparatus; and irradiating a second photoresist through the lens and an immersion liquid, the immersion liquid contacting the lens and the second photoresist in the first apparatus.
    Type: Grant
    Filed: November 1, 2006
    Date of Patent: June 3, 2008
    Assignee: Advanced Micro Devices, Inc.
    Inventors: Ramkumar Subramanian, Bhanwar Singh, Khoi A Phan, Srikanteswara Dakshina-Murthy
  • Patent number: 7376259
    Abstract: The present invention relates generally to photolithographic systems and methods, and more particularly to systems and methodologies that modify an imprint mask. An aspect of the invention generates feedback information that facilitates control of imprint mask feature height via employing a scatterometry system to detect topography variation and, decreasing imprint mask feature height in order to compensate for topography variation.
    Type: Grant
    Filed: June 23, 2004
    Date of Patent: May 20, 2008
    Assignee: Advanced Micro Devices, Inc.
    Inventors: Srikanteswara Dakshina-Murthy, Bhanwar Singh, Ramkumar Subramanian
  • Publication number: 20070283883
    Abstract: A system and method are provided to facilitate dual damascene interconnect integration with two imprint acts. The method provides for creation of a pair of translucent imprint molds containing the dual damascene pattern to be imprinted. The first imprint mold of the pair contains the via features of the dual damascene pattern and the second imprint mold of the pair contains the trench features. The via feature imprint mold is brought into contact with a first imaging layer deposited upon a first transfer layer which is deposited upon a dielectric layer of a substrate. The trench feature imprint mold is brought into contact with a second imaging layer deposited upon a second transfer layer which is deposited upon the first imaging layer of the substrate. When each imaging layer is exposed to a source of illumination, it cures with a structure matching the features of the corresponding imprint mold.
    Type: Application
    Filed: April 30, 2007
    Publication date: December 13, 2007
    Applicant: ADVANCED MICRO DEVICES, INC.
    Inventors: Srikanteswara Dakshina-Murthy, Bhanwar Singh, Ramkumar Subramanian