Patents by Inventor Sidlgata Sreenivasan

Sidlgata Sreenivasan 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: 20050260848
    Abstract: The present invention provides a method of forming recesses on a substrate, the method including forming on the substrate a patterning layer having first features; trim etching the first features to define trimmed features having a shape; and transferring an inverse of the shape into the substrate.
    Type: Application
    Filed: September 21, 2004
    Publication date: November 24, 2005
    Applicant: MOLECULAR IMPRINTS, INC.
    Inventor: Sidlgata Sreenivasan
  • Publication number: 20050260295
    Abstract: An apparatus to control displacement of a body spaced-apart from a surface includes a flexure system having a first flexure member defining a first axis of rotation and a second flexure member defining a second axis of rotation. A body is coupled to the flexure system to move about a plurality of axes. An actuation system is coupled to the flexure system to selectively constrain movement of the body along a subset of the plurality of axes.
    Type: Application
    Filed: February 28, 2005
    Publication date: November 24, 2005
    Inventors: Byung-Jin Choi, Sidlgata Sreenivasan, Stephen Johnson
  • Publication number: 20050253307
    Abstract: The present invention includes a method of patterning a conductive layer on an substrate that features creating a multi-layered structure by solidifying a liquid layer to have a pattern including protrusions and recessions, defining a solidified layer, and forming, upon the patterned layer, a liquid conformal layer. The liquid conformal layer is reflowed to provide a substantially smooth surface before solidification. In one embodiment of the invention, the liquid conformal layer may include a conductive component. By ensuring that the conformal layer forms a smooth, if not, planar surface, control over the dimensions of the resulting features is maintained. As a result, a single level layer of high density multiple conductive elements may be fabricated.
    Type: Application
    Filed: May 11, 2004
    Publication date: November 17, 2005
    Applicant: MOLECUALR IMPRINTS, INC.
    Inventor: Sidlgata Sreenivasan
  • Publication number: 20050236360
    Abstract: A compliant UV imprint lithography template, which may also act as a thermal implant template, and methods for manufacturing it. The template essentially comprises a relief image and an elastomer adapted to adjust the relief image. In an embodiment, the relief image is arranged in a compliant imprinting layer where the elastomer is arranged between the imprinting layer and a rigid transparent substrate. In an embodiment, the template is compliant to a wafer surface. In an embodiment, layering an elastomer and an imprinting layer on a substrate and patterning a relief image into the imprinting layer, form the template.
    Type: Application
    Filed: April 27, 2004
    Publication date: October 27, 2005
    Applicant: MOLECULAR IMPRINTS, INC.
    Inventors: Michael Watts, Ronald Voisin, Sidlgata Sreenivasan
  • Publication number: 20050189676
    Abstract: The present invention is directed to a method of forming a layer on a substrate comprising forming a plurality of flowable regions on the substrate and contacting the flowable regions with a plurality of molds disposed on a template. Thereafter, the plurality of flowable regions is solidified. In a further embodiment, the method further includes spreading each of the plurality of flowable regions to an area.
    Type: Application
    Filed: February 27, 2004
    Publication date: September 1, 2005
    Applicant: MOLECULAR IMPRINTS, INC.
    Inventor: Sidlgata Sreenivasan
  • Publication number: 20050185169
    Abstract: The present invention is directed to providing a method and system to measure characteristics of a film disposed on a substrate. The method includes identifying a plurality of processing regions on the film; measuring characteristics of a subset of the plurality of processing regions, defining measured characteristics; determining a variation of one of the measured characteristics; and associating a cause of the variations based upon a comparison of the one of the measured characteristics to measured characteristics associated with the remaining processing regions of the subset. The system carries out the aforementioned method.
    Type: Application
    Filed: February 19, 2004
    Publication date: August 25, 2005
    Applicant: MOLECULAR IMPRINTS, INC.
    Inventors: Ian McMackin, Philip Schumaker, Byung-Jin Choi, Sidlgata Sreenivasan, Michael Watts
  • Publication number: 20050160011
    Abstract: The present invention is directed to a method of forming a layer on a substrate, comprising forming a plurality of flowable regions on the substrate, with a first subset of the plurality of flowable regions comprising a first composition and a second subset of the plurality of flowable regions including a second composition differing from the first composition. A surface of the first and second subsets is provided with a desired shape and/or each of the areas of the substrate covered by the flowable regions may be provided with a desired shape. Thereafter, the desired shaped is recorded by solidifying the first and second subsets of the plurality of flowable regions.
    Type: Application
    Filed: January 20, 2004
    Publication date: July 21, 2005
    Applicant: MOLECULAR IMPRINTS, INC.
    Inventors: Sidlgata Sreenivasan, Van Truskett
  • Publication number: 20050106321
    Abstract: The present invention is directed to a method for dispensing a plurality of spaced-apart droplets of liquid a substrate that features minimizing the distance liquid in the droplets must travel to reach an adjacent droplet to form a contiguous lay of the liquid on the substrate. As a result, when patterning the droplets with a patterned template, the time required to fill the features of the pattern and to cover the substrate is minimized. This increases the throughput of the imprinting process. To that end, the method includes disposing a plurality of spaced-apart droplets on the substrate, each of which has a unit volume associated therewith. A spacing between adjacent droplets of a subset of the plurality of droplets is selected to be a function of a smallest unit volume associated with the subset.
    Type: Application
    Filed: November 14, 2003
    Publication date: May 19, 2005
    Applicant: MOLECULAR IMPRINTS, INC.
    Inventors: Ian McMackin, Byung-Jin Choi, Sidlgata Sreenivasan, Ronald Voisin
  • Publication number: 20050098534
    Abstract: The present invention is directed to a method forming conductive templates that includes providing a substrate; forming a mesa on the substrate; and forming a plurality of recessions and projections on the mesa with a nadir of the recessions comprising electrically conductive material and the projections comprising electrically insulative material. It is desired that the mesa be substantially transparent to a predetermined wavelength of radiation, for example ultraviolet radiation. As a result, it is desired to form the electrically conductive material from a material that allows ultraviolet radiation to propagate therethrough. In the present invention indium tin oxide is a suitable material from which to form the electrical conductive material.
    Type: Application
    Filed: November 12, 2003
    Publication date: May 12, 2005
    Applicant: MOLECULAR IMPRINTS, INC.
    Inventors: Sidlgata Sreenivasan, Ian McMackin, Byung-Jin Choi, Ronald Voisin
  • Publication number: 20050089774
    Abstract: A method to control a relative position between a surface and a body to form a pattern in the surface that features moving a body to obtain a desired relationship between the surface and the body. To that end, the method includes sensing the surface and the body and moving that body to obtain a desired spatial relationship with the surface.
    Type: Application
    Filed: February 24, 2004
    Publication date: April 28, 2005
    Applicant: Board of Regents, The University of Texas System
    Inventors: Byung Choi, Sidlgata Sreenivasan, Stephen Johnson
  • Publication number: 20050082253
    Abstract: The present invention comprises a method for applying a liquid, such as imprinting material, to a substrate that features use of an electromagnetic field to rapidly spread the liquid over a desired portion of the substrate, while confining the same to the desired region.
    Type: Application
    Filed: October 16, 2003
    Publication date: April 21, 2005
    Applicants: MOLECULAR IMPRINTS, INC., University of Texas System
    Inventors: Anshuman Cherala, Sidlgata Sreenivasan, Norman Schumaker
  • Publication number: 20050067379
    Abstract: The present invention is directed to providing a template with alignment marks that are opaque to selective wavelength of light. In one embodiment, a template is provided having patterning areas and a template, with the template mark being formed from metal and disposed outside of the patterning areas. The alignment marks may be surrounded by a moat to prevent curable liquid from being in superimposition therewith during imprinting. In this manner, opaque alignment marks may be employed without degrading the quality of the pattern formed during imprinting.
    Type: Application
    Filed: September 25, 2003
    Publication date: March 31, 2005
    Applicant: MOLECULAR IMPRINTS, INC.
    Inventors: Sidlgata Sreenivasan, Philip Schumaker
  • Publication number: 20050061773
    Abstract: The present invention provides a method for patterning a substrate with a template having a mold that features positioning conformable material between the substrate and the mold and filling a volume defined between the mold and the substrate with the conformable material through capillary action between the conformable material and one of the mold and the substrate. Thereafter, the conformable material is solidified. Specifically, the distance between the mold and the substrate is controlled to a sufficient degree to attenuate, if not avoid, compressive forces between the mold and the substrate. As a result, upon initial contact of the mold with the conformable material, spontaneous capillary filling of the volume between the mold and the substrate occurs.
    Type: Application
    Filed: August 21, 2003
    Publication date: March 24, 2005
    Inventors: Byung-Jin Choi, Sidlgata Sreenivasan, Michael Watts
  • Publication number: 20050064344
    Abstract: One embodiment of the present invention is an imprint template for imprint lithography that comprises alignment marks embedded in bulk material of the imprint template.
    Type: Application
    Filed: September 18, 2003
    Publication date: March 24, 2005
    Applicant: University of Texas System Board of Regents
    Inventors: Todd Bailey, Stephen Johnson, Matthew Colburn, Byung-Jin Choi, Britain Smith, John Ekerdt, Carlton Willson, Sidlgata Sreenivasan
  • Publication number: 20050051698
    Abstract: The present invention includes a conforming template for patterning liquids disposed on substrates. The template includes a body having opposed first and second surfaces. The first surface includes a plurality of recessed regions with a patterning region being disposed between adjacent recessed regions. Specifically, the recessed regions define flexure regions about which each patterning region may move independent of the remaining patterning regions of the template. In one embodiment the template is mounted to a fluid chamber having an inlet and a throughway. The template is connected to the throughway and the inlet is connected to a fluid source to facilitate deformation of the template to conform to a profile of a surface adjacent thereto.
    Type: Application
    Filed: July 7, 2003
    Publication date: March 10, 2005
    Applicant: Molecular Imprints, Inc.
    Inventors: Sidlgata Sreenivasan, Byung Choi, Ronald Voisin
  • Publication number: 20050028618
    Abstract: The present invention provides a technique for determining characteristics of substrates, such as the presence of contaminants, shape, as well as the spatial relationships between spaced-apart substrates. The spatial relationships include distance and angular orientation, between first and second spaced apart substrates. The technique includes forming a volume of fluid on the second substrate, with the volume of fluid having an area associated therewith. The volume of fluid is compressed between the first and second substrates to effectuate a change in properties of the area, defining changed properties. The changed properties are sensed, and the characteristics of the first and second substrates are determined as a function of the changed properties.
    Type: Application
    Filed: August 20, 2004
    Publication date: February 10, 2005
    Applicant: MOLECULAR IMPRINTS, INC.
    Inventors: Byung Chol, Sidlgata Sreenivasan
  • Publication number: 20050006343
    Abstract: The present invention is directed toward a system to vary dimensions of a template in order to attenuate if not prevent distortions in an underlying pattern formed by the template. To that end, the system features a compression device that includes a pair of spaced-apart contact members to compress a perimeter surface of the template between the pair of spaced-apart contact members. The compression device includes first and second bodies, each has a contact member and an actuator arm. One of the actuator arms is coupled to the first body to reciprocate about an axis in response to variations of a volume of a bladder disposed adjacent to the actuator arm. In this manner, the distance between the two contact members may be varied.
    Type: Application
    Filed: July 9, 2003
    Publication date: January 13, 2005
    Applicant: Molecular Imprints, Inc.
    Inventors: Byung Choi, Sidlgata Sreenivasan, Mario Meissl