Patents by Inventor Swaminathan Sivakumar

Swaminathan Sivakumar 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: 8441057
    Abstract: A method of patterning a metal (141, 341, 841) on a vertical sidewall (132, 332, 832) of an excavated feature (130, 330, 830) includes placing a material (350) in the excavated feature such that a portion (435) of the metal is exposed in the excavated feature above the material, etching the exposed portion of the metal away from the vertical sidewall using a first wet etch chemistry, and removing the material from the excavated feature by etching it away using a second wet etch chemistry. The described method may be used to produce a MIM capacitor (800) suitable for an eDRAM device.
    Type: Grant
    Filed: February 16, 2011
    Date of Patent: May 14, 2013
    Assignee: Intel Corporation
    Inventors: Steven J. Keating, Nick Lindert, Nadia Rahhal-Orabi, Brian Doyle, Satyarth Suri, Swaminathan Sivakumar, Lana Jong, Lin Sha
  • Publication number: 20120326218
    Abstract: A 6F2 DRAM cell with paired cells is described. In one embodiment the cell pairs are separated by n-type isolation transistors having gates defining dummy word lines. The dummy word lines are fabricated from a metal with a work function favoring p-channel devices.
    Type: Application
    Filed: June 27, 2011
    Publication date: December 27, 2012
    Inventors: Yih Wang, M. Clair Webb, Nick Lindert, Swaminathan Sivakumar, Kevin X. Zhang, Dinesh Somasekhar
  • Patent number: 8233210
    Abstract: Embodiments of systems and methods for providing a hybrid illumination aperture in optical lithography are generally described herein. Other embodiments may be described and claimed.
    Type: Grant
    Filed: December 30, 2008
    Date of Patent: July 31, 2012
    Assignee: Intel Corporation
    Inventors: Charles Wallace, Matthew Tingey, Swaminathan Sivakumar
  • Patent number: 8013426
    Abstract: A transistor structure and a method of forming same. The transistor structure includes: a semiconductor substrate having a gate-side surface; a gate disposed on the gate-side surface, the gate extending above the gate-side surface by a first height; a semiconductor extension disposed on the gate-side surface and extending above the gate-side surface by a second height larger than the first height, the semiconductor extension including a diffusion region having a diffusion surface located at the second height; and a diffusion contact element electrically coupled to the diffusion surface.
    Type: Grant
    Filed: December 28, 2007
    Date of Patent: September 6, 2011
    Assignee: Intel Corporation
    Inventor: Swaminathan Sivakumar
  • Patent number: 7981756
    Abstract: A process of forming a semiconductive capacitor device for a memory circuit includes forming a first capacitor cell recess and a second capacitor cell recess that are spaced apart by a capacitor cell boundary of a first height. The process includes lowering the first height of the capacitor cell boundary to a second height. A common plate capacitor bridges between the first recess and the second recess over the boundary above the second height and below the first height.
    Type: Grant
    Filed: December 22, 2008
    Date of Patent: July 19, 2011
    Assignee: Intel Corporation
    Inventors: Nick Lindert, Brian Doyle, Dinesh Somasekhar, Christopher J. Jezewski, Swaminathan Sivakumar, Kevin Zhang, Stephen Wu
  • Publication number: 20110134583
    Abstract: A method of patterning a metal (141, 341, 841) on a vertical sidewall (132, 332, 832) of an excavated feature (130, 330, 830) includes placing a material (350) in the excavated feature such that a portion (435) of the metal is exposed in the excavated feature above the material, etching the exposed portion of the metal away from the vertical sidewall using a first wet etch chemistry, and removing the material from the excavated feature by etching it away using a second wet etch chemistry. The described method may be used to produce a MIM capacitor (800) suitable for an eDRAM device.
    Type: Application
    Filed: February 16, 2011
    Publication date: June 9, 2011
    Inventors: Steve J. Keating, Nick Lindert, Nadia Rahhal-Orabi, Brian Doyle, Satyarth Suri, Swaminathan Sivakumar, Lana Jong, Lin Sha
  • Patent number: 7927959
    Abstract: A method of patterning a metal (141, 341, 841) on a vertical sidewall (132, 332, 832) of an excavated feature (130, 330, 830) includes placing a material (350) in the excavated feature such that a portion (435) of the metal is exposed in the excavated feature above the material, etching the exposed portion of the metal away from the vertical sidewall using a first wet etch chemistry, and removing the material from the excavated feature by etching it away using a second wet etch chemistry. The described method may be used to produce a MIM capacitor (800) suitable for an eDRAM device.
    Type: Grant
    Filed: September 30, 2008
    Date of Patent: April 19, 2011
    Assignee: Intel Corporation
    Inventors: Steven J. Keating, Nick Lindert, Nadia Rahhal-Orabi, Brian Doyle, Satyarth Suri, Swaminathan Sivakumar, Lana Jong, Lin Sha
  • Patent number: 7915171
    Abstract: Double patterning techniques and structures are generally described. In one example, a method includes depositing a first photoresist to a semiconductor substrate, forming a first integrated circuit (IC) pattern in the first photoresist, the first IC pattern comprising one or more trench structures, protecting the first IC pattern in the first photoresist from actions that form a second IC pattern in a second photoresist, depositing the second photoresist to the first IC pattern, and forming the second IC pattern in the second photoresist, the second IC pattern comprising one or more structures that are sufficiently close to the one or more trench structures of the first IC pattern to cause scumming of the second photoresist in the one or more trench structures of the first IC pattern.
    Type: Grant
    Filed: April 29, 2008
    Date of Patent: March 29, 2011
    Assignee: Intel Corporation
    Inventors: Charles H. Wallace, Matthew Tingey, Swaminathan Sivakumar
  • Patent number: 7820550
    Abstract: A method of forming a pattern on a wafer is provided. The method includes applying a photoresist on the wafer and exposing the wafer to define a first pattern on the photoresist. The method also includes exposing the wafer to define a second pattern on the photoresist, wherein each of the first and second patterns comprises unexposed portions of the photoresist and developing the wafer to form the first and second patterns on the photoresist, wherein the first and second patterns are formed by removing the unexposed portions of the photoresist.
    Type: Grant
    Filed: September 5, 2008
    Date of Patent: October 26, 2010
    Assignee: Intel Corporation
    Inventors: Paul Nyhus, Charles Wallace, Swaminathan Sivakumar
  • Patent number: 7816061
    Abstract: In one embodiment, a mask for use in semiconductor processing comprises a first region formed from a first material that is primarily opaque, a second region formed from a second material that is primarily transmissive, and a third region in which at least a portion of the second material is removed to generate a phase shift in radiation applied to the mask.
    Type: Grant
    Filed: June 19, 2007
    Date of Patent: October 19, 2010
    Assignee: Intel Corporation
    Inventors: Richard Schenker, Swaminathan Sivakumar, Paul Nyhus, Sven Henrichs
  • Patent number: 7755082
    Abstract: A nano-electrode or nano-wire may be etched centrally to form a gap between nano-electrode portions. The portions may ultimately constitute a single electron transistor. The source and drain formed from the electrode portions are self-aligned with one another. Using spacer technology, the gap between the electrodes may be made very small.
    Type: Grant
    Filed: November 8, 2007
    Date of Patent: July 13, 2010
    Assignee: Intel Corporation
    Inventors: Valery M. Dubin, Swaminathan Sivakumar, Andrew A. Berlin, Mark Bohr
  • Publication number: 20100171156
    Abstract: In one embodiment of the invention, contact patterning may be divided into two or more passes which may allow designers to control the gate height critical dimension relatively independent from the contact top critical dimension.
    Type: Application
    Filed: March 15, 2010
    Publication date: July 8, 2010
    Inventors: Nadia Rahhal-Orabi, Charles H. Wallace, Alison Davis, Swaminathan Sivakumar
  • Publication number: 20100165317
    Abstract: Embodiments of systems and methods for providing a hybrid illumination aperture in optical lithography are generally described herein. Other embodiments may be described and claimed.
    Type: Application
    Filed: December 30, 2008
    Publication date: July 1, 2010
    Inventors: Charles Wallace, Matthew Tingey, Swaminathan Sivakumar
  • Publication number: 20100155887
    Abstract: A process of forming a semiconductive capacitor device for a memory circuit includes forming a first capacitor cell recess and a second capacitor cell recess that are spaced apart by a capacitor cell boundary of a first height. The process includes lowering the first height of the capacitor cell boundary to a second height. A common plate capacitor bridges between the first recess and the second recess over the boundary above the second height and below the first height.
    Type: Application
    Filed: December 22, 2008
    Publication date: June 24, 2010
    Inventors: Nick Lindert, Brian Doyle, Dinesh Somasekhar, Christopher J. Jezewski, Swaminathan Sivakumar, Kevin Zhang, Stephen Wu
  • Patent number: 7709866
    Abstract: In one embodiment of the invention, contact patterning may be divided into two or more passes which may allow designers to control the gate height critical dimension relatively independent from the contact top critical dimension.
    Type: Grant
    Filed: June 26, 2007
    Date of Patent: May 4, 2010
    Assignee: Intel Corporation
    Inventors: Nadia Rahhal-Orabi, Charles H. Wallace, Alison Davis, Swaminathan Sivakumar
  • Publication number: 20100079924
    Abstract: A method of patterning a metal (141, 341, 841) on a vertical sidewall (132, 332, 832) of an excavated feature (130, 330, 830) includes placing a material (350) in the excavated feature such that a portion (435) of the metal is exposed in the excavated feature above the material, etching the exposed portion of the metal away from the vertical sidewall using a first wet etch chemistry, and removing the material from the excavated feature by etching it away using a second wet etch chemistry. The described method may be used to produce a MIM capacitor (800) suitable for an eDRAM device.
    Type: Application
    Filed: September 30, 2008
    Publication date: April 1, 2010
    Inventors: Steven J. Keating, Nick Lindert, Nadia Rahhal-Orabi, Brian Doyle, Satyarth Suri, Swaminathan Sivakumar, Lana Jong, Lin Sha
  • Publication number: 20100062228
    Abstract: A method of forming a pattern on a wafer is provided. The method includes applying a photoresist on the wafer and exposing the wafer to define a first pattern on the photoresist. The method also includes exposing the wafer to define a second pattern on the photoresist, wherein each of the first and second patterns comprises unexposed portions of the photoresist and developing the wafer to form the first and second patterns on the photoresist, wherein the first and second patterns are formed by removing the unexposed portions of the photoresist.
    Type: Application
    Filed: September 5, 2008
    Publication date: March 11, 2010
    Inventors: Paul Nyhus, Charles Wallace, Swaminathan Sivakumar
  • Publication number: 20090267175
    Abstract: Double patterning techniques and structures are generally described. In one example, a method includes depositing a first photoresist to a semiconductor substrate, forming a first integrated circuit (IC) pattern in the first photoresist, the first IC pattern comprising one or more trench structures, protecting the first IC pattern in the first photoresist from actions that form a second IC pattern in a second photoresist, depositing the second photoresist to the first IC pattern, and forming the second IC pattern in the second photoresist, the second IC pattern comprising one or more structures that are sufficiently close to the one or more trench structures of the first IC pattern to cause scumming of the second photoresist in the one or more trench structures of the first IC pattern.
    Type: Application
    Filed: April 29, 2008
    Publication date: October 29, 2009
    Inventors: Charles H. Wallace, Matthew Tingey, Swaminathan Sivakumar
  • Publication number: 20090263751
    Abstract: Embodiments of methods for double patterning photoresist are generally described herein. Other embodiments may be described and claimed.
    Type: Application
    Filed: April 22, 2008
    Publication date: October 22, 2009
    Inventors: Swaminathan Sivakumar, Anna Lio, Elliot Tan, Charles Wallace, Anant Jahagirdar
  • Patent number: 7572557
    Abstract: Sub-resolution assist features for non-collinear features are described for use in photolithography. A photolithography mask with elongated features is synthesized. An end-to-end gap between two features if found for which the ends of the two features facing the gap are linearly offset from one another. A sub-resolution assist feature is applied to the end-to-end gap between the elongated features, and the synthesized photolithography mask is modified to include the sub-resolution assist feature.
    Type: Grant
    Filed: December 7, 2005
    Date of Patent: August 11, 2009
    Assignee: Intel Corporation
    Inventors: Charles H. Wallace, Shannon E. Daviess, Swaminathan Sivakumar