Patents by Inventor Mehdi Vaez-Iravani

Mehdi Vaez-Iravani 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: 20190074201
    Abstract: Embodiments of the disclosure provide methods and system for inspecting and treating a substrate. In one embodiment, a method is provided including transmitting a first plurality of beams from a diffractive beam splitter to a first surface of a substrate to generate a reflection of a second plurality of beams, wherein the first plurality of beams are spaced apart from each other upon arriving at the first surface of the substrate; receiving the second plurality of beams on a recording surface of an optical device, wherein the second plurality of beams are spaced apart from each other upon arriving at the recording surface; measuring positional information of the second plurality of beams on the recording surface; comparing the positional information of the second plurality of beams to positional information stored in a memory; and storing a result of the comparison in the memory.
    Type: Application
    Filed: March 30, 2017
    Publication date: March 7, 2019
    Inventors: Mehdi VAEZ-IRAVANI, Todd EGAN, Samer BANNA, Kyle TANTIWONG
  • Publication number: 20190057910
    Abstract: Embodiments of the disclosure provide a metrology system. In one example, a metrology system includes a laser source adapted to transmit a light beam, a lens adapted to receive at least a portion of the light beam from the laser source, a first beam splitter positioned to receive at least the portion of the light beam passing through the lens, a first beam displacing device adapted to cause a portion of the light beam received from the beam splitter to be split into two or more sub-light beams a first recording device having a detection surface, and a first polarizer that is positioned between the first displacing device and the first recording device, wherein the first polarizer is configured to cause the two or more sub-light beams provided from the first displacing device to form an interference pattern on the detection surface of the first recording device.
    Type: Application
    Filed: March 9, 2017
    Publication date: February 21, 2019
    Inventors: Mehdi VAEZ-IRAVANI, Todd EGAN, Samer BANNA, Kyle TANTIWONG
  • Publication number: 20180329189
    Abstract: A method for flexible inspection of a sample includes forming an input beam using a beam source, blocking a portion of the input beam using an input mask, and forming a shaped beam from a portion of the input beam. The shaped beam is received at a first portion of an objective lens and focused onto a sample. A reflected beam is collected at a second portion of the objective lens. Scattered light is collected at the first and second portions of the objective lens and at a third portion of the objective lens. The scattered light is received at a dark-field detector module and a portion of the scattered light is directed to a dark-field detector. The dark-field detector module includes an output mask having one or more output apertures that allow at least part of the scattered light that passes through the third portion of the object lens to pass as the portion of the scattered light that is directed to the dark-field detector.
    Type: Application
    Filed: June 6, 2017
    Publication date: November 15, 2018
    Applicant: APPLIED MATERIALS, INC.
    Inventors: Samer Banna, Waheb Bishara, Dong Wu, Mehdi Vaez-Iravani
  • Publication number: 20180164228
    Abstract: Systems configured to inspect a wafer are provided. One system includes an illumination subsystem configured to direct pulses of light to an area on a wafer; a scanning subsystem configured to scan the pulses of light across the wafer; a collection subsystem configured to image pulses of light scattered from the area on the wafer to a sensor, wherein the sensor is configured to integrate a number of the pulses of scattered light that is fewer than a number of the pulses of scattered light that can be imaged on the entire area of the sensor, and wherein the sensor is configured to generate output responsive to the integrated pulses of scattered light; and a computer subsystem configured to detect defects on the wafer using the output generated by the sensor.
    Type: Application
    Filed: January 29, 2018
    Publication date: June 14, 2018
    Inventors: Anatoly Romanovsky, Ivan Maleev, Daniel Kavaldjiev, Yury Yuditsky, Dirk Woll, Stephen Biellak, Mehdi Vaez-Iravani, Guoheng Zhao
  • Patent number: 9989477
    Abstract: A compact and versatile multi-spot inspection imaging system employs an objective for focusing an array of radiation beams to a surface and a second reflective or refractive objective having a large numerical aperture for collecting scattered radiation from the array of illuminated spots. The scattered radiation from each illuminated spot is focused to a corresponding optical fiber channel so that information about a scattering may be conveyed to a corresponding detector in a remote detector array for processing. In one embodiment, a one-dimensional array of illumination beams is directed at an oblique angle to the surface to illuminate a line of illuminated spots at an angle to the plane of incidence. Radiation scattered from the spots are collected along directions perpendicular to the line of spots or in a double dark field configuration.
    Type: Grant
    Filed: December 29, 2016
    Date of Patent: June 5, 2018
    Assignee: KLA-Tencor Corporation
    Inventors: Mehdi Vaez-Iravani, Lawrence Robert Miller
  • Patent number: 9978620
    Abstract: Embodiments of the present disclosure relate to an apparatus and a method for reducing the adverse effects of exposing portions of an integrated circuit (IC) device to various forms of radiation during one or more operations found within the IC formation processing sequence by controlling the environment surrounding and temperature of an IC device during one or more parts of the IC formation processing sequence. The provided energy may include the delivery of radiation to a surface of a formed or a partially formed IC device during a deposition, etching, inspection or post-processing process operation. In some embodiments of the disclosure, the temperature of the substrate on which the IC device is formed is controlled to a temperature that is below room temperature (e.g., <20° C.) during the one or more parts of the IC formation processing sequence.
    Type: Grant
    Filed: May 2, 2017
    Date of Patent: May 22, 2018
    Assignee: APPLIED MATERIALS, INC.
    Inventors: Gary E. Dickerson, Seng (victor) Keong Lim, Samer Banna, Gregory Kirk, Mehdi Vaez-Iravani
  • Publication number: 20180074311
    Abstract: Embodiments described herein generally relate to a DMD. The DMD includes a base and a plurality of mirrors disposed on the base. Each mirror of the plurality of mirrors has a surface facing away from the base, and a structure is disposed on the surface of each mirror. The structure enhances the reflectance of the surface of each mirror, which enhances the efficiency of light manipulation and delivery.
    Type: Application
    Filed: May 14, 2015
    Publication date: March 15, 2018
    Inventors: Edward BUDIARTO, Mehdi VAEZ-IRAVANI, Christopher BENCHER
  • Patent number: 9915622
    Abstract: Systems configured to inspect a wafer are provided. One system includes an illumination subsystem configured to direct pulses of light to an area on a wafer; a scanning subsystem configured to scan the pulses of light across the wafer; a collection subsystem configured to image pulses of light scattered from the area on the wafer to a sensor, wherein the sensor is configured to integrate a number of the pulses of scattered light that is fewer than a number of the pulses of scattered light that can be imaged on the entire area of the sensor, and wherein the sensor is configured to generate output responsive to the integrated pulses of scattered light; and a computer subsystem configured to detect defects on the wafer using the output generated by the sensor.
    Type: Grant
    Filed: August 27, 2015
    Date of Patent: March 13, 2018
    Assignee: KLA-Tencor Corp.
    Inventors: Anatoly Romanovsky, Ivan Maleev, Daniel Kavaldjiev, Yury Yuditsky, Dirk Woll, Stephen Biellak, Mehdi Vaez-Iravani, Guoheng Zhao
  • Patent number: 9870935
    Abstract: A monitoring and deposition control system and method of operation thereof including: a deposition chamber for depositing a material layer on a substrate; a sensor array for monitoring deposition of the material layer for changes in a layer thickness of the material layer during deposition; and a processing unit for adjusting deposition parameters based on the changes in the layer thickness during deposition.
    Type: Grant
    Filed: August 28, 2015
    Date of Patent: January 16, 2018
    Assignee: APPLIED MATERIALS, INC.
    Inventors: Edward W. Budiarto, Majeed A. Foad, Ralf Hofmann, Thomas Nowak, Todd Egan, Mehdi Vaez-Iravani
  • Publication number: 20170287752
    Abstract: Embodiments of the disclosure provide an integrated system for performing a measurement process and a lithographic overlay error correction process on a semiconductor substrate in a single processing system. In one embodiment, a processing system includes at least a load lock chamber, a transfer chamber coupled to the load lock chamber, an ion implantation processing chamber coupled to or in the transfer chamber, and a metrology tool coupled to the transfer chamber, wherein the metrology tool is adapted to obtain stress profile or an overlay error on a substrate disposed in the metrology tool.
    Type: Application
    Filed: February 28, 2017
    Publication date: October 5, 2017
    Inventors: Ludovic GODET, Mehdi VAEZ-IRAVANI, Todd EGAN, Mangesh BANGAR, Concetta RICCOBENE, Abdul Aziz KHAJA, Srinivas D. NEMANI, Ellie Y. YIEH, Sean S. KANG
  • Publication number: 20170271181
    Abstract: Embodiments of the present disclosure relate to an apparatus and a method for reducing the adverse effects of exposing portions of an integrated circuit (IC) device to various forms of radiation during one or more operations found within the IC formation processing sequence by controlling the environment surrounding and temperature of an IC device during one or more parts of the IC formation processing sequence. The provided energy may include the delivery of radiation to a surface of a formed or a partially formed IC device during a deposition, etching, inspection or post-processing process operation. In some embodiments of the disclosure, the temperature of the substrate on which the IC device is formed is controlled to a temperature that is below room temperature (e.g., <20° C.) during the one or more parts of the IC formation processing sequence.
    Type: Application
    Filed: May 2, 2017
    Publication date: September 21, 2017
    Inventors: Gary E. DICKERSON, Seng (victor) Keong LIM, Samer BANNA, Gregory KIRK, Mehdi VAEZ-IRAVANI
  • Publication number: 20170205358
    Abstract: A compact and versatile multi-spot inspection imaging system employs an objective for focusing an array of radiation beams to a surface and a second reflective or refractive objective having a large numerical aperture for collecting scattered radiation from the array of illuminated spots. The scattered radiation from each illuminated spot is focused to a corresponding optical fiber channel so that information about a scattering may be conveyed to a corresponding detector in a remote detector array for processing. In one embodiment, a one-dimensional array of illumination beams is directed at an oblique angle to the surface to illuminate a line of illuminated spots at an angle to the plane of incidence. Radiation scattered from the spots are collected along directions perpendicular to the line of spots or in a double dark field configuration.
    Type: Application
    Filed: December 29, 2016
    Publication date: July 20, 2017
    Applicant: KLA-Tencor Corporation
    Inventors: Mehdi Vaez-Iravani, Lawrence Robert Miller
  • Patent number: 9679372
    Abstract: Disclosed are methods and apparatus for inspecting an extreme ultraviolet (EUV) reticle is disclosed. An inspection tool for detecting electromagnetic waveforms is used to obtain a phase defect map for the EUV reticle before a pattern is formed on the EUV reticle, and the phase defect map identifies a position of each phase defect on the EUV reticle. After the pattern is formed on the EUV reticle, a charged particle tool is used to obtain an image of each reticle portion that is proximate to each position of each phase defect as identified in the phase defect map. The phase defect map and one or images of each reticle portion that is proximate to each position of each phase defect are displayed or stored so as to facilitate analysis of whether to repair or discard the EUV reticle.
    Type: Grant
    Filed: January 7, 2015
    Date of Patent: June 13, 2017
    Assignee: KLA-Tencor Corporation
    Inventors: Mehran Nasser-Ghodsi, Stanley E. Stokowski, Mehdi Vaez-Iravani
  • Patent number: 9646893
    Abstract: Embodiments of the present disclosure relate to an apparatus and a method for reducing the adverse effects of exposing portions of an integrated circuit (IC) device to various forms of radiation during one or more operations found within the IC formation processing sequence by controlling the environment surrounding and temperature of an IC device during one or more parts of the IC formation processing sequence. The provided energy may include the delivery of radiation to a surface of a formed or a partially formed IC device during a deposition, etching, inspection or post-processing process operation. In some embodiments of the disclosure, the temperature of the substrate on which the IC device is formed is controlled to a temperature that is below room temperature (e.g., <20° C.) during the one or more parts of the IC formation processing sequence.
    Type: Grant
    Filed: March 18, 2016
    Date of Patent: May 9, 2017
    Assignee: APPLIED MATERIALS, INC.
    Inventors: Gary E. Dickerson, Seng (victor) Keong Lim, Samer Banna, Gregory Kirk, Mehdi Vaez-Iravani
  • Patent number: 9619878
    Abstract: Optical inspection methods and apparatus for high-resolution photomasks using only a test image. A filter is applied to an image signal received from radiation that is transmitted by or reflected from a photomask having a test image. The filter may be implemented using programmed control to adjust and control filter conditions, illumination conditions, and magnification conditions.
    Type: Grant
    Filed: April 11, 2014
    Date of Patent: April 11, 2017
    Assignee: KLA-Tencor Corporation
    Inventors: Fred Stanke, Ilya Toytman, David Alles, Gregg Anthony Inderhees, Stanley E. Stokowski, Mehdi Vaez-Iravani
  • Patent number: 9568435
    Abstract: A compact and versatile multi-spot inspection imaging system employs an objective for focusing an array of radiation beams to a surface and a second reflective or refractive objective having a large numerical aperture for collecting scattered radiation from the array of illuminated spots. The scattered radiation from each illuminated spot is focused to a corresponding optical fiber channel so that information about a scattering may be conveyed to a corresponding detector in a remote detector array for processing. In one embodiment, a one-dimensional array of illumination beams is directed at an oblique angle to the surface to illuminate a line of illuminated spots at an angle to the plane of incidence. Radiation scattered from the spots are collected along directions perpendicular to the line of spots or in a double dark field configuration.
    Type: Grant
    Filed: August 21, 2014
    Date of Patent: February 14, 2017
    Assignee: KLA-Tencor Corporation
    Inventors: Mehdi Vaez-Iravani, Lawrence Robert Miller
  • Publication number: 20170017165
    Abstract: The present disclosure provides a method for producing an image on a substrate. The method includes providing a single beam of light to a multiple DMD assembly, splitting the single beam of light into an s-polarization beam and a p-polarization beam, and reflecting the s-polarization beam and the p-polarization beam through the multiple DMD assembly such that the multiple DMD assembly produces a plurality of superimposed images on the substrate.
    Type: Application
    Filed: July 12, 2016
    Publication date: January 19, 2017
    Inventors: Christopher Dennis BENCHER, Joseph R. JOHNSON, Dave MARKLE, Mehdi VAEZ-IRAVANI
  • Publication number: 20160370173
    Abstract: Embodiments of the present disclosure relate to apparatus and methods for forming films having uniformity of thickness on substrates. Embodiments of the present disclosure may be used to measure thickness or other properties of films being deposited on a substrate without knowing beforehand the surface properties of the substrate. Embodiments of the present disclosure may be used to measure thickness or other properties of a plurality of layers being formed. For example, embodiments of the present disclosure may be used in measuring thickness of vertical memory stacks.
    Type: Application
    Filed: June 16, 2016
    Publication date: December 22, 2016
    Inventors: Khokan C. PAUL, Edward BUDIARTO, Todd EGAN, Mehdi VAEZ-IRAVANI, Jeongmin LEE, Dale R. DU BOIS, Terrance Y. LEE
  • Publication number: 20160276227
    Abstract: Embodiments of the present disclosure relate to an apparatus and a method for reducing the adverse effects of exposing portions of an integrated circuit (IC) device to various forms of radiation during one or more operations found within the IC formation processing sequence by controlling the environment surrounding and temperature of an IC device during one or more parts of the IC formation processing sequence. The provided energy may include the delivery of radiation to a surface of a formed or a partially formed IC device during a deposition, etching, inspection or post-processing process operation. In some embodiments of the disclosure, the temperature of the substrate on which the IC device is formed is controlled to a temperature that is below room temperature (e.g., <20° C.) during the one or more parts of the IC formation processing sequence.
    Type: Application
    Filed: March 18, 2016
    Publication date: September 22, 2016
    Inventors: Gary E. DICKERSON, Seng (victor) Keong LIM, Samer BANNA, Gregory KIRK, Mehdi VAEZ-IRAVANI
  • Patent number: 9404873
    Abstract: Systems configured to inspect a wafer are provided. One system includes an illumination subsystem configured to illuminate a set of spots on a wafer and a collection subsystem configured to collect light from the set of spots. The collection subsystem separately images the light collected from each of the individual spots onto only a corresponding first detector of a first detection subsystem. The collection subsystem also images the light collected from at least some of the individual spots onto a number of second detectors of a second detection subsystem that is less than a number of spots in the set. Output produced by the first and second detectors can be used to detect defects on the wafer.
    Type: Grant
    Filed: March 2, 2013
    Date of Patent: August 2, 2016
    Assignee: KLA-Tencor Corp.
    Inventors: Stephen Biellak, Mehdi Vaez-Iravani