Patents by Inventor Rajesh Menon

Rajesh Menon 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).

  • Publication number: 20090087797
    Abstract: A lithography system is disclosed that includes an array of focusing elements for directing focused illumination toward a recording medium, and a reversible contrast-enhancement material disposed between the recording medium and the array of focusing elements.
    Type: Application
    Filed: December 17, 2008
    Publication date: April 2, 2009
    Inventors: Rajesh Menon, Henry I. Smith
  • Publication number: 20090046299
    Abstract: An imaging system is provided. The imaging system includes a sample to be scanned by the imaging system. An absorbance modulation layer (AML) is positioned in close proximity to the sample and is physically separate from the sample. One or more sub-wavelength apertures are generated within the AML, whose size is determined by the material properties of the AML and the intensities of the illuminating wavelengths. A light source transmits an optical signal through the one or more sub-wavelength apertures generating optical near-fields that are collected for imaging.
    Type: Application
    Filed: August 6, 2008
    Publication date: February 19, 2009
    Inventors: Rajesh Menon, Henry I. Smith
  • Patent number: 7405806
    Abstract: A maskless lithography system is disclosed that includes a spatial light modulator, first and second imaging areas, and first folding optics. The spatial light modulator receives illumination from an illumination source and provides a modulated illumination beam having a first cross-sectional line length in a length-wise direction and a first cross-sectional width in a width-wise direction that is substantially smaller than said first cross-sectional length. The first imaging area receives a first portion of the modulated illumination beam. The first folding optics provides a second portion of the modulated illumination beam that is adjacent the first portion of the modulated illumination beam in the length-wise direction at a second imaging area that is not adjacent the first imaging area in the length-wise direction.
    Type: Grant
    Filed: April 14, 2005
    Date of Patent: July 29, 2008
    Assignee: Massachusetts Institute of Technology
    Inventors: Rajesh Menon, Henry I. Smith
  • Patent number: 7348104
    Abstract: A method is disclosed for forming an array of focusing elements for use in a lithography system. The method involves varying an exposure characteristic over an area to create a focusing element that varies in thickness in certain embodiments. In further embodiments, the method includes the steps of providing a first pattern via lithography in a substrate, depositing a conductive absorber material on the substrate, applying an electrical potential to at least a first portion of the conductive absorber material, leaving a second portion of the conductive material without the electrical potential, and etching the second portion of the conductive material to provide a first pattern on the substrate that is aligned with the first portion of the conductive absorber material.
    Type: Grant
    Filed: October 2, 2003
    Date of Patent: March 25, 2008
    Assignee: Massachusetts Institute of Technology
    Inventors: Dario Gil, Jeffrey T. Hastings, James G. Goodberlet, Rajesh Menon, David J. Carter, Henry I. Smith
  • Patent number: 7304318
    Abstract: A method is disclosed for creating a permanent pattern on a substrate. The method includes the steps of providing an array of photon sources, each of which provides a photon beam, providing an array of focusing elements, each of which focuses an associated photon beam from the array of photon sources onto a substrate, and creating a permanent pattern on a substrate using the array of focusing elements to respectively focus associated photon beams on the substrate.
    Type: Grant
    Filed: March 16, 2005
    Date of Patent: December 4, 2007
    Assignee: Massachusetts Institute of Technology
    Inventors: Dario Gil, Rajesh Menon, David Carter, Henry I. Smith, George Barbastathis
  • Publication number: 20070154850
    Abstract: A method to enhance resolution in optical lithography via absorbance-modulation involves exposing an opaque absorbance modulation layer (AML) to a first waveform having wavelength, 81, with the first exposure forming a first set of transparent regions in the opaque AML and forming a first pattern made of a set of exposed regions in a photoresist layer. Next, the AML is restored to its original opaque state. Next, the restored AML is re-exposed to the first waveform having wavelength, 81, with the exposure forming a second set of transparent regions in the opaque AML and forming a second pattern having a set of exposed regions in a photoresist layer. The first and second patterns in the photoresist layer form a final pattern with enhanced resolution and decreased spatial period than the first pattern.
    Type: Application
    Filed: November 30, 2006
    Publication date: July 5, 2007
    Inventor: Rajesh Menon
  • Patent number: 7193782
    Abstract: An optical manipulation system is disclosed that includes an array of focusing elements, which focuses the energy beamlets from an array of beamlet sources into an array of focal spots in order to individually manipulate a plurality of samples on an adjacent substrate.
    Type: Grant
    Filed: December 30, 2003
    Date of Patent: March 20, 2007
    Assignee: Massachusetts Institute of Technology
    Inventors: Rajesh Menon, Dario Gil, George Barbastathis, Henry I. Smith
  • Patent number: 7160673
    Abstract: A method is disclosed for forming an array of focusing elements for use in a lithography system. In accordance with an embodiment, the method includes the steps of providing a master element that includes at least one diffractive pattern at a first location with respect to a target surface, illuminating the master element to produce a first diffractive pattern on the target surface at the first location, moving the master element with respect to the target surface to a second location with respect to the target surface, and illuminating the master element to produce a second diffractive pattern on the target surface at the second location.
    Type: Grant
    Filed: October 2, 2003
    Date of Patent: January 9, 2007
    Assignee: Massachusetts Institute of Technology
    Inventors: Rajesh Menon, Dario Gil, David J. Carter, George Barbastathis, Henry I. Smith
  • Patent number: 7148496
    Abstract: A system and method are disclosed for providing error correction in an imaging system. The system includes an error determination unit for determining an amount of error associated with a spot at (x,y) in a binary pattern to be imaged, a determination unit for determining the location of a nearest exposed spot at (xi, yi) for each spot at (x,y), and a dose modification unit for modifying an exposure dose at the nearest exposed spot at (xi, yi) for each spot at (x,y).
    Type: Grant
    Filed: April 13, 2004
    Date of Patent: December 12, 2006
    Assignee: Massachusetts Institute of Technology
    Inventors: Rajesh Menon, Dario Gil, George Barbastathis, Henry I. Smith
  • Publication number: 20060232755
    Abstract: A maskless lithography system is disclosed that includes a spatial light modulator, first and second imaging areas, and first folding optics. The spatial light modulator receives illumination from an illumination source and provides a modulated illumination beam having a first cross-sectional line length in a length-wise direction and a first cross-sectional width in a width-wise direction that is substantially smaller than said first cross-sectional length. The first imaging area receives a first portion of the modulated illumination beam. The first folding optics provides a second portion of the modulated illumination beam that is adjacent the first portion of the modulated illumination beam in the length-wise direction at a second imaging area that is not adjacent the first imaging area in the length-wise direction.
    Type: Application
    Filed: April 14, 2005
    Publication date: October 19, 2006
    Inventors: Rajesh Menon, Henry Smith
  • Publication number: 20060186355
    Abstract: A lithography system includes a source of radiation energy and a zone plate array to focus the radiation energy to create an array of images in order to produce a permanent pattern on a substrate. A phase-shift mask is optically located between the source of radiation energy and the zone plate array. The modulated wavefront produced by the phase-shift mask alters the field diffracted by the zone plate array, and the center lobe of the point-spread function narrows as a result.
    Type: Application
    Filed: February 3, 2006
    Publication date: August 24, 2006
    Inventors: Henry Smith, George Barbastathis, Rajesh Menon
  • Publication number: 20060183059
    Abstract: A lithography system is disclosed that provides an array of areas of imaging electromagnetic energy that are directed toward a recording medium. The reversible contrast-enhancement material is disposed between the recording medium and the array of areas of imaging electromagnetic energy.
    Type: Application
    Filed: January 13, 2006
    Publication date: August 17, 2006
    Inventors: Rajesh Menon, Henry Smith
  • Publication number: 20060183058
    Abstract: A lithography system is disclosed that includes an array of focusing elements for directing focused illumination toward a recording medium, and a reversible contrast-enhancement material disposed between the recording medium and the array of focusing elements.
    Type: Application
    Filed: June 16, 2005
    Publication date: August 17, 2006
    Inventors: Rajesh Menon, Henry Smith
  • Patent number: 6960773
    Abstract: A maskless lithography system is disclosed that includes an array of blazed diffractive zone plates, each of which focuses an energy beam into an array of images in order to create a permanent pattern on an adjacent substrate in certain embodiments. In further embodiments, an array of apodized diffractive elements may also be used.
    Type: Grant
    Filed: July 21, 2003
    Date of Patent: November 1, 2005
    Assignee: Massachusetts Institute of Technology
    Inventors: Rajesh Menon, Dario Gil, David Carter, Henry I. Smith, George Barbastathis
  • Publication number: 20050224725
    Abstract: A system and method are disclosed for providing error correction in an imaging system. The system includes an error determination unit for determining an amount of error associated with a spot at (x,y) in a binary pattern to be imaged, a determination unit for determining the location of a nearest exposed spot at (xi, yi) for each spot at (x,y), and a dose modification unit for modifying an exposure dose at the nearest exposed spot at (xi, yi) for each spot at (x,y).
    Type: Application
    Filed: April 13, 2004
    Publication date: October 13, 2005
    Inventors: Rajesh Menon, Dario Gil, George Barbastathis, Henry Smith
  • Publication number: 20050181314
    Abstract: A maskless lithography system is disclosed that includes an array of focusing elements, each of which focuses an energy beam from an array of sources into an array of focal spots in order to create a permanent pattern on an adjacent substrate.
    Type: Application
    Filed: March 16, 2005
    Publication date: August 18, 2005
    Inventors: Dario Gil, Rajesh Menon, David Carter, Henry Smith, George Barbastathis
  • Publication number: 20050146794
    Abstract: An optical manipulation system is disclosed that includes an array of focusing elements, which focuses the energy beamlets from an array of beamlet sources into an array of focal spots in order to individually manipulate a plurality of samples on an adjacent substrate.
    Type: Application
    Filed: December 30, 2003
    Publication date: July 7, 2005
    Inventors: Rajesh Menon, Dario Gil, George Barbastathis, Henry Smith
  • Patent number: 6894292
    Abstract: A maskless lithography system is disclosed that includes an array of focusing elements, each of which focuses an energy beam from an array of sources into an array of focal spots in order to create a permanent pattern on an adjacent substrate.
    Type: Grant
    Filed: July 28, 2003
    Date of Patent: May 17, 2005
    Assignee: Massachusetts Institute of Technology
    Inventors: Dario Gil, Rajesh Menon, David Carter, Henry I. Smith, George Barbastathis
  • Publication number: 20040135100
    Abstract: A method is disclosed for forming an array of focusing elements for use in a lithography system. In accordance with an embodiment, the method includes the steps of providing a master element that includes at least one diffractive pattern at a first location with respect to a target surface, illuminating the master element to produce a first diffractive pattern on the target surface at the first location, moving the master element with respect to the target surface to a second location with respect to the target surface, and illuminating the master element to produce a second diffractive pattern on the target surface at the second location.
    Type: Application
    Filed: October 2, 2003
    Publication date: July 15, 2004
    Inventors: Rajesh Menon, Dario Gil, David J. Carter, George Barbastathis, Henry I. Smith
  • Publication number: 20040131946
    Abstract: A method is disclosed for forming an array of focusing elements for use in a lithography system. The method involves varying an exposure characteristic over an area to create a focusing element that varies in thickness in certain embodiments. In further embodiments, the method includes the steps of providing a first pattern via lithography in a substrate, depositing a conductive absorber material on the substrate, applying an electrical potential to at least a first portion of the conductive absorber material, leaving a second portion of the conductive material without the electrical potential, and etching the second portion of the conductive material to provide a first pattern on the substrate that is aligned with the first portion of the conductive absorber material.
    Type: Application
    Filed: October 2, 2003
    Publication date: July 8, 2004
    Inventors: Dario Gil, Jeffrey T. Hastings, James G. Goodberlet, Rajesh Menon, David J. Carter, Henry I. Smith