Patents by Inventor Kujan Gorhad

Kujan Gorhad 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: 20250385095
    Abstract: The present invention relates to a method for conditioning a bonding of substrates. The method comprising: applying a plurality of local modifications within a first substrate for facilitating bonding the first substrate to a second substrate. The invention comprises further conditioning methods, a corresponding computer program and a corresponding apparatus.
    Type: Application
    Filed: August 15, 2025
    Publication date: December 18, 2025
    Inventors: Sergey Oshemkov, Alexander Gusarov, Vladimir Dmitriev, Vladimir Kruglyakov, Kujan Gorhad, Hani Zeidan
  • Publication number: 20250379057
    Abstract: A method for adjusting a shape of a wafer and/or die having a substrate and at least one surface layer comprises applying a plurality of local modifications in the wafer and/or die, wherein applying the plurality of local modifications comprises applying a plurality of local modifications within the at least one surface layer and/or applying a plurality of local modifications within the substrate, via the at least one surface layer.
    Type: Application
    Filed: June 11, 2025
    Publication date: December 11, 2025
    Inventor: Kujan Gorhad
  • Publication number: 20240280892
    Abstract: The present invention relates to a method for correcting placement errors in a photolithographic mask comprising a substrate and structures formed on the substrate, the method involving at least one local density change, preferably a plurality of local density changes, each of which defines a pixel, being introduced into the substrate by use of a laser beam in order to correct placement errors of the structures, wherein in an examination step, an incidence surface of the mask, via which the laser beam radiates into the substrate, is examined for contaminations and, in regions in which a contamination of the incidence surface has been ascertained in the examination step, no laser irradiation or a laser irradiation with at least one changed laser beam parameter takes place, the laser beam parameter(s) being changed such that no damage to the incidence surface or near-surface regions occurs in the case of an interaction between laser beam and contamination.
    Type: Application
    Filed: February 16, 2024
    Publication date: August 22, 2024
    Inventors: Vladimir Dmitriev, Avi Cohen, Kujan Gorhad, Hani Zeidan
  • Patent number: 11914289
    Abstract: The present invention refers to a method for determining an effect of one or more of pixels to be introduced into a substrate of a photolithographic mask, the photolithographic mask having one or more pattern elements, wherein the one or more pixels serve to at least partly correct one or more errors of the photolithographic mask, the method comprising: determining the effect of the one or more introduced pixels by determining a change in birefringence of the substrate of the photolithographic mask having the one or more pattern elements.
    Type: Grant
    Filed: January 4, 2021
    Date of Patent: February 27, 2024
    Assignee: Carl Zeiss SMS Ltd.
    Inventors: Joachim Welte, Uri Stern, Kujan Gorhad, Vladimir Dmitriev
  • Patent number: 11366383
    Abstract: The present invention refers to a method and an apparatus for determining positions of a plurality of pixels to be introduced into a substrate of a photolithographic mask by use of a laser system, wherein the pixels serve to at least partly correct one or more errors of the photolithographic mask. The method comprises the steps: (a) obtaining error data associated with the one or more errors; (b) obtaining first parameters of an illumination system, the first parameters determining an illumination of the photolithographic mask of the illumination system when processing a wafer by illuminating with the illumination system using the photolithographic mask; and (c) determining the positions of the plurality of pixels based on the error data and the first parameters.
    Type: Grant
    Filed: October 1, 2019
    Date of Patent: June 21, 2022
    Assignee: Carl Zeiss SMS Ltd.
    Inventors: Vladimir Dmitriev, Kujan Gorhad, Joachim Welte, Tanya Serzhanyuk
  • Publication number: 20210124259
    Abstract: The present invention refers to a method for determining an effect of one or more of pixels to be introduced into a substrate of a photolithographic mask, the photolithographic mask having one or more pattern elements, wherein the one or more pixels serve to at least partly correct one or more errors of the photolithographic mask, the method comprising: determining the effect of the one or more introduced pixels by determining a change in birefringence of the substrate of the photolithographic mask having the one or more pattern elements.
    Type: Application
    Filed: January 4, 2021
    Publication date: April 29, 2021
    Inventors: Joachim Welte, Uri Stern, Kujan Gorhad, Vladimir Dmitriev
  • Publication number: 20200124959
    Abstract: The present invention refers to a method and an apparatus for determining positions of a plurality of pixels to be introduced into a substrate of a photolithographic mask by use of a laser system, wherein the pixels serve to at least partly correct one or more errors of the photolithographic mask. The method comprises the steps: (a) obtaining error data associated with the one or more errors; (b) obtaining first parameters of an illumination system, the first parameters determining an illumination of the photolithographic mask of the illumination system when processing a wafer by illuminating with the illumination system using the photolithographic mask; and (c) to determining the positions of the plurality of pixels based on the error data and the first parameters.
    Type: Application
    Filed: October 1, 2019
    Publication date: April 23, 2020
    Inventors: Vladimir Dmitriev, Kujan Gorhad, Joachim Welte, Tanya Serzhanyuk
  • Patent number: 10578975
    Abstract: The invention relates to a method for correcting the critical dimension uniformity of a photomask for semiconductor lithography, comprising the following steps: determining a transfer coefficient as a calibration parameter, correcting the photomask by writing pixel fields, verifying the photomask corrected thus, wherein a transfer coefficient is used for verifying the corrected photomask, said transfer coefficient being obtained from a measured scattering function of pixel fields.
    Type: Grant
    Filed: October 5, 2018
    Date of Patent: March 3, 2020
    Assignees: Carl Zeiss SMT GmbH, Carl Zeiss SMS Ltd.
    Inventors: Thomas Thaler, Joachim Welte, Kujan Gorhad, Vladimir Dmitriev, Ute Buttgereit, Thomas Scheruebl, Yuval Perets
  • Publication number: 20190107783
    Abstract: The invention relates to a method for correcting the critical dimension uniformity of a photomask for semiconductor lithography, comprising the following steps: determining a transfer coefficient as a calibration parameter, correcting the photomask by writing pixel fields, verifying the photomask corrected thus, wherein a transfer coefficient is used for verifying the corrected photomask, said transfer coefficient being obtained from a measured scattering function of pixel fields.
    Type: Application
    Filed: October 5, 2018
    Publication date: April 11, 2019
    Inventors: Thomas Thaler, Joachim Welte, Kujan Gorhad, Vladimir Dmitriev, Ute Buttgereit, Thomas Scheruebl, Yuval Perets