Patents by Inventor Pradeep Govil

Pradeep Govil 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: 20060262288
    Abstract: A method and system are used to control a characteristic of a beam. The system comprises an illumination system, at least one optical element, a fluid source, and a pressure and/or fluid concentration controller. The illumination system produces a beam of radiation. The at least one optical element has at least one fluid path therethrough through which the beam passes and is capable of changing a characteristic of one or more portions of the beam. The fluid source supplies fluid to the at least one fluid path. The pressure and/or fluid concentration controller controls pressure and/or fluid concentration of the fluid to change the characteristic of the beam, which is positioned between the fluid source and the optical element.
    Type: Application
    Filed: May 19, 2005
    Publication date: November 23, 2006
    Applicant: ASML Holding N.V.
    Inventor: Pradeep Govil
  • Publication number: 20060164711
    Abstract: A system and method utilize an array of dynamically controllable optical elements to adjust one or more portions of a beam propagating therethrough. For example, the adjustments can be to change a ratio of horizontally and vertically polarized light in the portions of the beam. The adjustments can be made through application of an appropriate electric field to each of the optical elements, which forms an electrooptic modulator. In one example, a polarizer/analyzer is positioned after the array, such that only desired orientations are transmitted. The polarizing provides a desired light intensity profile, which can, for example, make the intensity inform across the beam or be used to partially or fully attenuate (e.g., block) the beam.
    Type: Application
    Filed: January 24, 2005
    Publication date: July 27, 2006
    Applicant: ASML Holding N.V.
    Inventors: Pradeep Govil, James Tsacoyeanes
  • Publication number: 20060121375
    Abstract: A system and method utilize a dynamically controllable optical element that receives an electrical field, which changes an index of refraction in at least one direction within the optical element. The change in index of refraction imparts a change to a beam of radiation passing through the optical element. The electric field is controlled by a feedback/control signal from a feedback system that includes a detector positioned proximate an image plane in the system. The optical element can be positioned in various places within the system depending on what light characteristics need to be adjusted, for example after an illumination system or after a light patterning system. In this manner, the optical element, under control of the dynamic electric field, can dynamically change its propagation characteristics to dynamically change either a beam of illumination from the illumination system or a patterned beam of radiation from the patterning system, such that they exhibit desired light characteristics.
    Type: Application
    Filed: December 7, 2004
    Publication date: June 8, 2006
    Inventors: James Tsacoyeanes, Pradeep Govil
  • Publication number: 20060087720
    Abstract: A system and method utilize an optical element that receives an electrical field, which changes an index of refraction in at least one direction within the optical element. The change in index of refraction imparts a change to a beam of radiation passing through the optical element. A material used to form the optical element exhibits characteristics, such that wavelengths of the beam of radiation above about 155 nanometers are transmitted through the optical element with little or not absorption or attenuation.
    Type: Application
    Filed: October 26, 2004
    Publication date: April 27, 2006
    Applicant: ASML Holding N.V.
    Inventors: James Tsacoyeanes, Pradeep Govil
  • Publication number: 20060028703
    Abstract: A deformable optical device includes a reflection device having a first reflecting surface and a second surface, an actuator (e.g., an integrated circuit piezoelectric actuator) having a support device and moveable extensions extending therefrom, which are coupled to the second surface, and electrodes coupled to corresponding ones of the extensions. Wavefront aberrations are detected and used to generate a control signal. The extensions are moved based on the control signal. The movement deforms the reflecting surface to correct the aberrations in the wavefront.
    Type: Application
    Filed: October 6, 2005
    Publication date: February 9, 2006
    Applicant: ASML Holding N.V.
    Inventors: Pradeep Govil, Andrew Guzman
  • Publication number: 20050046921
    Abstract: A spatial light modulator (SLM) includes an integrated circuit actuator that can be fabricated using photolithography or other similar techniques. The actuator includes actuator elements, which can be made from piezoelectric materials. An electrode array is coupled to opposite walls of each of the actuator elements is an electrode array. Each array of electrodes can have one or more electrode sections. The array of reflective devices forms the SLM.
    Type: Application
    Filed: August 29, 2003
    Publication date: March 3, 2005
    Inventors: Pradeep Govil, James Tsacoyeanes
  • Publication number: 20050023573
    Abstract: A deformable optical device includes a reflection device having a first reflecting surface and a second surface, an actuator (e.g., an integrated circuit piezoelectric actuator) having a support device and moveable extensions extending therefrom, which are coupled to the second surface, and electrodes coupled to corresponding ones of the extensions. Wavefront aberrations are detected and used to generate a control signal. The extensions are moved based on the control signal. The movement deforms the reflecting surface to correct the aberrations in the wavefront.
    Type: Application
    Filed: July 30, 2003
    Publication date: February 3, 2005
    Inventors: Pradeep Govil, Andrew Guzman