Patents by Inventor Krupakar M. Subramanian

Krupakar M. Subramanian 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: 9610593
    Abstract: The present invention is generally directed to a system for controlling placement of nanoparticles, and methods of using same. In one illustrative embodiment, the device includes a substrate and a plurality of funnels in the substrate, wherein each of the funnels comprises an inlet opening and an elongated, rectangular shaped outlet opening. In one illustrative embodiment, the method includes creating a dusty plasma comprising a plurality of carbon nanotubes, positioning a mask between the dusty plasma and a desired target for the carbon nanotubes, the mask having a plurality of openings extending therethrough, and extinguishing the dusty plasma to thereby allow at least some of the carbon nanotubes in the dusty plasma to pass through at least some of the plurality of openings in the mask and land on the target.
    Type: Grant
    Filed: June 22, 2015
    Date of Patent: April 4, 2017
    Assignee: Micron Technology, Inc.
    Inventors: Krupakar M. Subramanian, Neal R. Rueger, Gurtej S. Sandhu
  • Patent number: 9524875
    Abstract: A method of etching trenches into silicon of a semiconductor substrate includes forming a mask over silicon of a semiconductor substrate, with the mask comprising trenches formed there-through. Plasma etching is conducted to form trenches into the silicon of the semiconductor substrate using the mask. In one embodiment, the plasma etching includes forming an etching plasma using precursor gases which include SF6, an oxygen-containing compound, and a nitrogen-containing compound. In one embodiment, the plasma etching includes an etching plasma which includes a sulfur-containing component, an oxygen-containing component, and NFx.
    Type: Grant
    Filed: August 7, 2014
    Date of Patent: December 20, 2016
    Assignee: Micron Technology, Inc.
    Inventor: Krupakar M. Subramanian
  • Publication number: 20150283563
    Abstract: The present invention is generally directed to a system for controlling placement of nanoparticles, and methods of using same. In one illustrative embodiment, the device includes a substrate and a plurality of funnels in the substrate, wherein each of the funnels comprises an inlet opening and an elongated, rectangular shaped outlet opening. In one illustrative embodiment, the method includes creating a dusty plasma comprising a plurality of carbon nanotubes, positioning a mask between the dusty plasma and a desired target for the carbon nanotubes, the mask having a plurality of openings extending therethrough, and extinguishing the dusty plasma to thereby allow at least some of the carbon nanotubes in the dusty plasma to pass through at least some of the plurality of openings in the mask and land on the target.
    Type: Application
    Filed: June 22, 2015
    Publication date: October 8, 2015
    Applicant: Micron Technology, Inc.
    Inventors: Krupakar M. Subramanian, Neal R. Rueger, Gurtej S. Sandhu
  • Patent number: 9061297
    Abstract: The present invention is generally directed to a system for controlling placement of nanoparticles, and methods of using same. In one illustrative embodiment, the device includes a substrate and a plurality of funnels in the substrate, wherein each of the funnels comprises an inlet opening and an elongated, rectangular shaped outlet opening. In one illustrative embodiment, the method includes creating a dusty plasma comprising a plurality of carbon nanotubes, positioning a mask between the dusty plasma and a desired target for the carbon nanotubes, the mask having a plurality of openings extending therethrough, and extinguishing the dusty plasma to thereby allow at least some of the carbon nanotubes in the dusty plasma to pass through at least some of the plurality of openings in the mask and land on the target.
    Type: Grant
    Filed: May 23, 2014
    Date of Patent: June 23, 2015
    Assignee: Micron Technology, Inc.
    Inventors: Krupakar M. Subramanian, Neal R. Rueger, Gurtej S. Sandhu
  • Publication number: 20140349487
    Abstract: A method of etching trenches into silicon of a semiconductor substrate includes forming a mask over silicon of a semiconductor substrate, with the mask comprising trenches formed there-through. Plasma etching is conducted to form trenches into the silicon of the semiconductor substrate using the mask. In one embodiment, the plasma etching includes forming an etching plasma using precursor gases which include SF6, an oxygen-containing compound, and a nitrogen-containing compound. In one embodiment, the plasma etching includes an etching plasma which includes a sulfur-containing component, an oxygen-containing component, and NFx.
    Type: Application
    Filed: August 7, 2014
    Publication date: November 27, 2014
    Inventor: Krupakar M. Subramanian
  • Publication number: 20140252135
    Abstract: The present invention is generally directed to a system for controlling placement of nanoparticles, and methods of using same. In one illustrative embodiment, the device includes a substrate and a plurality of funnels in the substrate, wherein each of the funnels comprises an inlet opening and an elongated, rectangular shaped outlet opening. In one illustrative embodiment, the method includes creating a dusty plasma comprising a plurality of carbon nanotubes, positioning a mask between the dusty plasma and a desired target for the carbon nanotubes, the mask having a plurality of openings extending therethrough, and extinguishing the dusty plasma to thereby allow at least some of the carbon nanotubes in the dusty plasma to pass through at least some of the plurality of openings in the mask and land on the target.
    Type: Application
    Filed: May 23, 2014
    Publication date: September 11, 2014
    Applicant: Micron Technology, Inc.
    Inventors: Krupakar M. Subramanian, Neal R. Rueger, Gurtej S. Sandhu
  • Patent number: 8802573
    Abstract: A method of etching trenches into silicon of a semiconductor substrate includes forming a mask over silicon of a semiconductor substrate, with the mask comprising trenches formed there-through. Plasma etching is conducted to form trenches into the silicon of the semiconductor substrate using the mask. In one embodiment, the plasma etching includes forming an etching plasma using precursor gases which include SF6, an oxygen-containing compound, and a nitrogen-containing compound. In one embodiment, the plasma etching includes an etching plasma which includes a sulfur-containing component, an oxygen-containing component, and NFx.
    Type: Grant
    Filed: August 9, 2012
    Date of Patent: August 12, 2014
    Assignee: Micron Technology, Inc.
    Inventor: Krupakar M. Subramanian
  • Patent number: 8569863
    Abstract: A voltage-controlled semiconductor inductor and method is provided. According to various embodiments, the voltage-controlled inductor includes a conductor configured with a number of inductive coils. The inductor also includes a semiconductor material having a contact with at least a portion of at least one of the coils. The semiconductor material is doped to form a diode with a first doped region of first conductivity type, a second doped region of second conductivity type, and a depletion region. A voltage across the diode changes lengths of the first doped region, the second doped region and the depletion region, and adjacent coils in contact with at least one of the doped regions are electrically shorted, thereby varying the inductance of the inductor. In various embodiments, the inductor is electrically connected to a resistor and a capacitor to provide a tunable RLC circuit. Other aspects and embodiments are provided herein.
    Type: Grant
    Filed: May 4, 2011
    Date of Patent: October 29, 2013
    Assignee: Micron Technology, Inc.
    Inventor: Krupakar M. Subramanian
  • Patent number: 8479384
    Abstract: Various pattern transfer and etching steps can be used to create features. Conventional photolithography steps can be used in combination with pitch-reduction techniques to form superimposed, pitch-reduced patterns of crossing elongate features that can be consolidated into a single layer. Planarizing techniques using a filler layer and a protective layer are disclosed. Portions of an integrated circuit having different heights can be etched to a common plane.
    Type: Grant
    Filed: August 11, 2011
    Date of Patent: July 9, 2013
    Assignee: Micron Technology, Inc.
    Inventors: Mirzafer Abatchev, David Wells, Baosuo Zhou, Krupakar M. Subramanian
  • Publication number: 20120302067
    Abstract: A method of etching trenches into silicon of a semiconductor substrate includes forming a mask over silicon of a semiconductor substrate, with the mask comprising trenches formed there-through. Plasma etching is conducted to form trenches into the silicon of the semiconductor substrate using the mask. In one embodiment, the plasma etching includes forming an etching plasma using precursor gases which include SF6, an oxygen-containing compound, and a nitrogen-containing compound. In one embodiment, the plasma etching includes an etching plasma which includes a sulfur-containing component, an oxygen-containing component, and NFx.
    Type: Application
    Filed: August 9, 2012
    Publication date: November 29, 2012
    Applicant: Micron Technology Inc.
    Inventor: Krupakar M. Subramanian
  • Publication number: 20120244244
    Abstract: Nanoimprint lithography templates are provided. One such template includes a template base and a plurality of pattern layers of a first material. Each pattern layer is separated from an adjacent pattern layer by a spacing layer of a second material that is different from the first material. Such a template also includes a plurality of pillars of a third material that is different from the first material. Each of the pillars separates two adjacent pattern layers, and each of the pattern layers has a respective portion which protrudes from the spacing layers and from the pillars.
    Type: Application
    Filed: April 30, 2012
    Publication date: September 27, 2012
    Applicant: Micron Technology, Inc.
    Inventors: Krupakar M. Subramanian, Mirzafer Abatchev
  • Patent number: 8252658
    Abstract: A method of etching trenches into silicon of a semiconductor substrate includes forming a mask over silicon of a semiconductor substrate, with the mask comprising trenches formed there-through. Plasma etching is conducted to form trenches into the silicon of the semiconductor substrate using the mask. In one embodiment, the plasma etching includes forming an etching plasma using precursor gases which include SF6, an oxygen-containing compound, and a nitrogen-containing compound. In one embodiment, the plasma etching includes an etching plasma which includes a sulfur-containing component, an oxygen-containing component, and NFx.
    Type: Grant
    Filed: March 17, 2010
    Date of Patent: August 28, 2012
    Assignee: Micron Technology, Inc.
    Inventor: Krupakar M. Subramanian
  • Patent number: 8183138
    Abstract: Methods for forming nanodots and/or a patterned material are provided. One such method involves forming a first patterning material over a base. Blades of a nanoimprint lithography template are placed within the first patterning material, wherein the blades extend along the base in a first direction. With the blades within the first patterning material, the first patterning material are cured. The blades are removed from the first patterning material to form a patterned first patterning material. The base is etched using the patterned first patterning material as a pattern to form openings in the base. The patterned first patterning material is removed from the base. A second patterning material is formed over the base and within the openings in the base. Blades of a nanoimprint lithography template are placed within the second patterning material, wherein the blades extend along the base in a second direction, which is generally perpendicular with respect to the first direction.
    Type: Grant
    Filed: February 15, 2010
    Date of Patent: May 22, 2012
    Assignee: Micron Technology, Inc.
    Inventors: Krupakar M. Subramanian, Mirzafer Abatchev
  • Publication number: 20110294294
    Abstract: Various pattern transfer and etching steps can be used to create features. Conventional photolithography steps can be used in combination with pitch-reduction techniques to form superimposed, pitch-reduced patterns of crossing elongate features that can be consolidated into a single layer. Planarizing techniques using a filler layer and a protective layer are disclosed. Portions of an integrated circuit having different heights can be etched to a common plane.
    Type: Application
    Filed: August 11, 2011
    Publication date: December 1, 2011
    Applicant: Micron Technology, Inc.
    Inventors: Mirzafer Abatchev, David Wells, Baosuo Zhou, Krupakar M. Subramanian
  • Patent number: 8011090
    Abstract: Various pattern transfer and etching steps can be used to create features. Conventional photolithography steps can be used in combination with pitch-reduction techniques to form superimposed, pitch-reduced patterns of crossing elongate features that can be consolidated into a single layer. Planarizing techniques using a filler layer and a protective layer are disclosed. Portions of an integrated circuit having different heights can be etched to a common plane.
    Type: Grant
    Filed: May 19, 2008
    Date of Patent: September 6, 2011
    Assignee: Micron Technology, Inc.
    Inventors: Mirzafer Abatchev, David Wells, Baosuo Zhou, Krupakar M. Subramanian
  • Publication number: 20110204473
    Abstract: A voltage-controlled semiconductor inductor and method is provided. According to various embodiments, the voltage-controlled inductor includes a conductor configured with a number of inductive coils. The inductor also includes a semiconductor material having a contact with at least a portion of at least one of the coils. The semiconductor material is doped to form a diode with a first doped region of first conductivity type, a second doped region of second conductivity type, and a depletion region. A voltage across the diode changes lengths of the first doped region, the second doped region and the depletion region, and adjacent coils in contact with at least one of the doped regions are electrically shorted, thereby varying the inductance of the inductor. In various embodiments, the inductor is electrically connected to a resistor and a capacitor to provide a tunable RLC circuit. Other aspects and embodiments are provided herein.
    Type: Application
    Filed: May 4, 2011
    Publication date: August 25, 2011
    Inventor: Krupakar M. Subramanian
  • Publication number: 20110123726
    Abstract: Apparatus, methods, and systems for sorting nanostructures, such as nanodots or nanotubes, are described. Sorting the nanostructures removes remnants of the nanotube fabrication from a mixture or bundle of material. The sorting activity may include suspending the mixture in a plasma to separate nanostructures and remnant material. A motive force, such as gas flow or laser, can be applied to the suspended nanostructures and remnants to move larger material out of the plasma, leaving smaller material trapped in the plasma. Additional embodiments are disclosed.
    Type: Application
    Filed: February 2, 2011
    Publication date: May 26, 2011
    Inventor: Krupakar M. Subramanian
  • Patent number: 7944019
    Abstract: A voltage-controlled semiconductor inductor and method is provided. According to various embodiments, the voltage-controlled inductor includes a conductor configured with a number of inductive coils. The inductor also includes a semiconductor material having a contact with at least a portion of at least one of the coils. The semiconductor material is doped to form a diode with a first doped region of first conductivity type, a second doped region of second conductivity type, and a depletion region. A voltage across the diode changes lengths of the first doped region, the second doped region and the depletion region, and adjacent coils in contact with at least one of the doped regions are electrically shorted, thereby varying the inductance of the inductor. In various embodiments, the inductor is electrically connected to a resistor and a capacitor to provide a tunable RLC circuit. Other aspects and embodiments are provided herein.
    Type: Grant
    Filed: February 27, 2009
    Date of Patent: May 17, 2011
    Assignee: Micron Technology, Inc.
    Inventor: Krupakar M. Subramanian
  • Patent number: 7883927
    Abstract: Methods and systems for sorting nanostructures, such as nanodot or nanotubes, are described. The sorting of the nanostructures removes remnants of the nanotube fabrication from the mixture or bundle of material. The sorting includes suspending the mixture in a plasma, which separated the nanostructures and remnant material. A motive force, such as gas flow or laser, is applied to the suspended nanostructures and remnants such that the larger material moves out of the plasma while the smaller material remains trapped in the plasma.
    Type: Grant
    Filed: August 31, 2005
    Date of Patent: February 8, 2011
    Assignee: Micron Technology, Inc.
    Inventor: Krupakar M. Subramanian
  • Publication number: 20100178748
    Abstract: A method of etching trenches into silicon of a semiconductor substrate includes forming a mask over silicon of a semiconductor substrate, with the mask comprising trenches formed there-through. Plasma etching is conducted to form trenches into the silicon of the semiconductor substrate using the mask. In one embodiment, the plasma etching includes forming an etching plasma using precursor gases which include SF6, an oxygen-containing compound, and a nitrogen-containing compound. In one embodiment, the plasma etching includes an etching plasma which includes a sulfur-containing component, an oxygen-containing component, and NFx.
    Type: Application
    Filed: March 17, 2010
    Publication date: July 15, 2010
    Applicant: Micron Technology, Inc.
    Inventor: Krupakar M. Subramanian