Patents by Inventor Venkatakaushik VOLETI

Venkatakaushik VOLETI 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: 20250125171
    Abstract: A method includes identifying a first growth rate of a first region of a substrate associated with one or more substrate deposition processes performed in a processing chamber of substrate processing equipment. The method further includes determining, based on the first growth rate, thickness data of a second region of the substrate without second structure data of the second region. The thickness data is determined in a non-destructive manner. The method further includes causing performance of an action associated with processing one or more substrates via the processing chamber of the substrate processing equipment based on the thickness data of the second region of the substrate.
    Type: Application
    Filed: December 23, 2024
    Publication date: April 17, 2025
    Inventors: Eric Chin Hong Ng, Edward Wibowo Budiarto, Mehdi Vaez-Iravani, Todd Jonathan Egan, Venkatakaushik Voleti
  • Publication number: 20250123569
    Abstract: Embodiments of the disclosure include a method for forming a device comprising generating an image of a second die that is bonded on a first die that is bonded on a base substrate, the first die having a first feature formed on a first surface of the first die and the second die having a second feature formed on a second surface of the second die, determining a relative displacement between portions of the first feature and the second feature based on the generated image, and determining updated alignment instructions based on the determined relative displacement
    Type: Application
    Filed: October 11, 2023
    Publication date: April 17, 2025
    Inventors: Yau Loong CHONG, Venkatakaushik VOLETI, Ruiping WANG, Mehdi VAEZ-IRAVANI
  • Publication number: 20250076212
    Abstract: An optical inspection system for pre-bonding inspection system includes a stage on which a sample to be inspected is placed, a sensor, optical assemblies, each including an optical head having optics to direct a sample field-of-view (FOV) to a portion of the sample, a first light source configured to illuminate the sample at a first oblique angle, a second light source configured to illuminate the sample at a second oblique angle, a focusing lens to focus a first optical image of the portion of the sample generated by the first light source, and a second optical image of the portion of the sample generated by the second light source onto a segment of the sensor, and a controller configured to combine the first optical image and the second optical image generated by each optical assembly, and generate a map of point defects on the sample.
    Type: Application
    Filed: August 8, 2024
    Publication date: March 6, 2025
    Inventors: Venkatakaushik VOLETI, Mehdi VAEZ-IRAVANI
  • Publication number: 20250076216
    Abstract: An optical inspection system for pre-bonding inspection includes a stage having a surface on which a sample to be inspected is placed, the surface of the sample having at least parts with a two dimensional (2D) periodic pattern which may include defects, an optical head including optics, a dark-field illuminator configured to illuminate the surface of the sample at an first angle, wherein the first angle is an oblique angle, a bright-field illuminator configured to illuminate the surface at a second angle, a dark-field collection path, a bright-field collection path, and a sensor configured to detect light transmitted from the dark-field illuminator, scattered at the surface of the sample, collected by the optical head, and relayed through the dark-field collection path, and light transmitted from the bright-field illuminator, reflected at the surface of the sample, and relayed through the bright-field collection path.
    Type: Application
    Filed: August 9, 2024
    Publication date: March 6, 2025
    Inventors: Venkatakaushik VOLETI, Yun-Ching CHANG, Dan XIE, Gregory KIRK, Mehdi VAEZ-IRAVANI
  • Publication number: 20250062145
    Abstract: A scanning inspection apparatus detects anomalies on surfaces of objects such as substrates, substrates with bonded chiplets, and carriers with singulated chiplets and the like. In some embodiments, the inspection apparatus includes a time delay integrated (TDI) linear sensor with an optical input and a data output where more than one optical assembly is positioned adjacent to each other with an optical output focused on a different segment of the TDI linear sensor and with an optical input positioned to receive a portion of a surface under examination. The apparatus may further include a platform with an upper surface for supporting an object with the surface under examination and with a motion assembly to move the platform and with a controller in communication with the motion assembly to move the platform in relation to the optical input of the optical assembly.
    Type: Application
    Filed: August 16, 2023
    Publication date: February 20, 2025
    Inventors: Venkatakaushik VOLETI, Mehdi VAEZ-IRAVANI
  • Patent number: 12222659
    Abstract: Methods and apparatus for detecting metrology data are provided herein. For example, an apparatus comprises a substrate support configured to support a substrate and another substrate disposed on the substrate, an incoherent light source configured to transmit an illumination beam through the substrate and the another substrate, a set of optics configured to direct the illumination beam when transmitted through the substrate and the another substrate, an actuator operably coupled to the substrate support and configured to move the substrate and another substrate back and forth in a scanning pattern, and a sensor operably coupled to the actuator, synchronized therewith, and configured to receive the illumination beam from the set of optics to obtain subsurface images of the substrate and the another substrate.
    Type: Grant
    Filed: January 18, 2023
    Date of Patent: February 11, 2025
    Assignee: APPLIED MATERIALS, INC.
    Inventors: Venkatakaushik Voleti, Mehdi Vaez-Iravani
  • Patent number: 12211717
    Abstract: A method includes identifying first structure data of a first region of a substrate and receiving optical metrology data of the substrate associated with one or more substrate deposition processes in a processing chamber. The method further includes determining, based on the optical metrology data and the first structure data, a first growth rate of the first region of the substrate associated with the one or more substrate deposition processes. The method further includes predicting, based on the optical metrology data and the first growth rate, thickness data of a second region of the substrate without second structure data of the second region.
    Type: Grant
    Filed: March 29, 2021
    Date of Patent: January 28, 2025
    Assignee: Applied Materials, Inc.
    Inventors: Eric Chin Hong Ng, Edward Wibowo Budiarto, Mehdi Vaez-Iravani, Todd Jonathan Egan, Venkatakaushik Voleti
  • Publication number: 20250012560
    Abstract: Disclosed systems and techniques are directed to interferometry-based sample thickness metrology in manufacturing systems. For example, the disclosed techniques include directing a focused beam to a plurality of locations of a sample and detecting an interference pattern (IP) associated with a light departing from the respective location and generated upon interaction of the focused beam with the sample. The techniques further include determining, based on a first IP associated with a first light departing from a first location and a second IP associated with a second light departing from a second location, a magnitude and a sign of a difference between a first thickness of the sample at the first location and a second thickness of the sample at the second location.
    Type: Application
    Filed: February 23, 2024
    Publication date: January 9, 2025
    Inventors: Venkatakaushik Voleti, Mehdi Vaez-Iravani
  • Publication number: 20240363446
    Abstract: Methods and apparatus of hybrid bonding with inspection are provided herein. In some embodiments, a method of hybrid bonding with inspection includes: cleaning a substrate via a first cleaning chamber and a tape frame having a plurality of chiplets via a second cleaning chamber; inspecting, via a first metrology system, the substrate for pre-bond defects in a first metrology chamber and the tape frame for pre-bond defects in a second metrology chamber; bonding one or more of the plurality of chiplets to the substrate via a hybrid bonding process in a bonder chamber to form a bonded substrate; and performing, via a second metrology system different than the first metrology system, a post-bond inspection of the bonded substrate via a third metrology chamber for post-bond defects.
    Type: Application
    Filed: April 28, 2023
    Publication date: October 31, 2024
    Inventors: Venkatakaushik VOLETI, Kyle TANTIWONG, Mehdi VAEZ-IRAVANI
  • Publication number: 20240241456
    Abstract: Methods and apparatus for detecting metrology data are provided herein. For example, an apparatus comprises a substrate support configured to support a substrate and another substrate disposed on the substrate, an incoherent light source configured to transmit an illumination beam through the substrate and the another substrate, a set of optics configured to direct the illumination beam when transmitted through the substrate and the another substrate, an actuator operably coupled to the substrate support and configured to move the substrate and another substrate back and forth in a scanning pattern, and a sensor operably coupled to the actuator, synchronized therewith, and configured to receive the illumination beam from the set of optics to obtain subsurface images of the substrate and the another substrate.
    Type: Application
    Filed: January 18, 2023
    Publication date: July 18, 2024
    Inventors: Venkatakaushik VOLETI, Mehdi VAEZ-IRAVANI
  • Publication number: 20240170317
    Abstract: An apparatus for detecting metrology data in semiconductor packaging processes using fast focus and acquisition techniques to determine alignment metrology data for hybrid bonding. In some embodiments, the apparatus may include a source configured to illuminate a focal point with a wavelength selected from wavelengths greater than 1100 nm, an optical lens that forms an illumination beam when illuminated by the source, an acousto-optic scanner that moves the illumination beam back and forth in a scanning pattern, a splitter to allow the illumination beam to be directed at a metrology sampling location while allowing a reflection beam caused by the illumination beam to pass through the splitter to a detector, a set of optics configured to focus the illumination beam at one or more focal points in a Z direction to obtain subsurface images, and a substrate platform configured to hold a substrate and to move the substrate during scanning.
    Type: Application
    Filed: November 23, 2022
    Publication date: May 23, 2024
    Inventors: Venkatakaushik VOLETI, Keith Buckley WELLS, Mehdi VAEZ-IRAVANI
  • Patent number: 11908716
    Abstract: Methods and systems for monitoring etch or deposition processes using image-based in-situ process monitoring techniques include illuminating a measurement area on a sample disposed in a process chamber. The measurement area is illuminated using an input beam generated remote from the process chamber and transmitted to a first viewing window of the process chamber by a first optical fiber. Portions of the first input beam reflected from the measurement area are transmitted from the first viewing window to an imaging sensor by a second optical fiber. A sequence of images is obtained at the imaging sensor, and a change in reflectance of pixels within each of the images is determined. The etch or deposition process is monitored based on the change in reflectance.
    Type: Grant
    Filed: May 14, 2021
    Date of Patent: February 20, 2024
    Assignee: Applied Materials, Inc.
    Inventors: Guoheng Zhao, Venkatakaushik Voleti, Todd Egan, Kyle R. Tantiwong, Andreas Schulze, Niranjan Ramchandra Khasgiwale, Mehdi Vaez-Iravani
  • Publication number: 20220367217
    Abstract: Methods and systems for monitoring etch or deposition processes using image-based in-situ process monitoring techniques include illuminating a measurement area on a sample disposed in a process chamber. The measurement area is illuminated using an input beam generated remote from the process chamber and transmitted to a first viewing window of the process chamber by a first optical fiber. Portions of the first input beam reflected from the measurement area are transmitted from the first viewing window to an imaging sensor by a second optical fiber. A sequence of images is obtained at the imaging sensor, and a change in reflectance of pixels within each of the images is determined. The etch or deposition process is monitored based on the change in reflectance.
    Type: Application
    Filed: May 14, 2021
    Publication date: November 17, 2022
    Inventors: Guoheng Zhao, Venkatakaushik Voleti, Todd J. Egan, Kyle R. Tantiwong, Andreas Schulze, Niranjan Ramchandra Khasgiwale, Mehdi Vaez-Iravani
  • Publication number: 20220310425
    Abstract: A method includes identifying first structure data of a first region of a substrate and receiving optical metrology data of the substrate associated with one or more substrate deposition processes in a processing chamber. The method further includes determining, based on the optical metrology data and the first structure data, a first growth rate of the first region of the substrate associated with the one or more substrate deposition processes. The method further includes predicting, based on the optical metrology data and the first growth rate, thickness data of a second region of the substrate without second structure data of the second region.
    Type: Application
    Filed: March 29, 2021
    Publication date: September 29, 2022
    Inventors: Eric Chin Hong Ng, Edward Wibowo Budiarto, Mehdi Vaez-Iravani, Todd Jonathan Egan, Venkatakaushik Voleti
  • Patent number: 11333874
    Abstract: In some embodiments of SCAPE imaging systems, a Powell lens is used to expand light from a light source into a sheet of illumination light. An optical system sweeps the sheet of illumination light through a sample, and forms an image at an intermediate image plane from detected return light. A camera captures images of the intermediate image plane. In some embodiments of SCAPE imaging systems, an optical system sweeps the sheet of illumination light through a sample, and forms an image at an intermediate image plane from detected return light. A camera captures images of the intermediate image plane. In the latter embodiments, the optical system is deliberately misaligned with respect to a true alignment position so that a significant portion of light that would be lost at the true alignment position will arrive at the camera.
    Type: Grant
    Filed: March 19, 2021
    Date of Patent: May 17, 2022
    Assignee: The Trustees of Columbia University in the City of New York
    Inventors: Elizabeth M. C. Hillman, Venkatakaushik Voleti
  • Publication number: 20210223532
    Abstract: In some embodiments of SCAPE imaging systems, a Powell lens is used to expand light from a light source into a sheet of illumination light. An optical system sweeps the sheet of illumination light through a sample, and forms an image at an intermediate image plane from detected return light. A camera captures images of the intermediate image plane. In some embodiments of SCAPE imaging systems, an optical system sweeps the sheet of illumination light through a sample, and forms an image at an intermediate image plane from detected return light. A camera captures images of the intermediate image plane. In the latter embodiments, the optical system is deliberately misaligned with respect to a true alignment position so that a significant portion of light that would be lost at the true alignment position will arrive at the camera.
    Type: Application
    Filed: March 19, 2021
    Publication date: July 22, 2021
    Applicant: The Trustees of Columbia University in the City of New York
    Inventors: Elizabeth M.C. HILLMAN, Venkatakaushik VOLETI
  • Patent number: 10955652
    Abstract: In a first SCAPE imaging system, a Powell lens (105) is used to expand light from a light source (100) into a sheet of illumination light. An optical system (125,131,132,140) sweeps the sheet of illumination light through a sample (145), and forms an image at a tilted intermediate image plane (170) from detected return light. A camera (190) captures images of the intermediate image plane. In a second SCAPE imaging system, an optical system (125,131,132,140) sweeps the sheet of illumination light through a sample (145), and forms an image at a tilted intermediate image plane (170) from detected return light. A camera (190) captures images of the intermediate image plane. The detection optics are deliberately misaligned with respect to a true alignment position so that a significant portion of light that would be lost at the true alignment position will arrive at the camera.
    Type: Grant
    Filed: September 27, 2017
    Date of Patent: March 23, 2021
    Assignee: The Trustees of Columbia University in the City of New York
    Inventors: Elizabeth M. C. Hillman, Venkatakaushik Voleti
  • Patent number: 10908088
    Abstract: A scanning element routes a sheet or beam of excitation light through a first set of optical components and into a sample at an oblique angle. The position of the excitation light within the sample varies depending on the orientation of the scanning element. Fluorophores within the sample emit fluorescent detection light. The first set of optical components route the detection light back to the scanning element, and the scanning element routes the detection light through a second set of optical components and into a camera. The second set of optical components includes a phase modulating element that induces a controlled aberration so as to homogenize point spread functions of points at, above, and below a focal plane when measured at the camera. In some embodiments, the images captured by the camera are processed to correct for aberration by performing deconvolution of a point spread function.
    Type: Grant
    Filed: May 30, 2017
    Date of Patent: February 2, 2021
    Assignee: The Trustees of Columbia University in the City of New York
    Inventors: Venkatakaushik Voleti, Elizabeth M. C. Hillman
  • Publication number: 20200249168
    Abstract: A scanning element routes a sheet or beam of excitation light through a first set of optical components and into a sample at an oblique angle. The position of the excitation light within the sample varies depending on the orientation of the scanning element. Fluorophores within the sample emit fluorescent detection light. The first set of optical components route the detection light back to the scanning element, and the scanning element routes the detection light through a second set of optical components and into a camera. The second set of optical components includes a phase modulating element that induces a controlled aberration so as to homogenize point spread functions of points at, above, and below a focal plane when measured at the camera. In some embodiments, the images captured by the camera are processed to correct for aberration by performing deconvolution of a point spread function.
    Type: Application
    Filed: May 30, 2017
    Publication date: August 6, 2020
    Applicant: The Trustees of Columbia University in the City of New York
    Inventors: Venkatakaushik VOLETI, Elizabeth M.C. HILLMAN
  • Publication number: 20190278073
    Abstract: In a first SCAPE imaging system, a Powell lens (105) is used to expand light from a light source (100) into a sheet of illumination light. An optical system (125,131,132,140) sweeps the sheet of illumination light through a sample (145), and forms an image at a tilted intermediate image plane (170) from detected return light. A camera (190) captures images of the intermediate image plane. In a second SCAPE imaging system, an optical system (125,131,132,140) sweeps the sheet of illumination light through a sample (145), and forms an image at a tilted intermediate image plane (170) from detected return light. A camera (190) captures images of the intermediate image plane. The detection optics are deliberately misaligned with respect to a true alignment position so that a significant portion of light that would be lost at the true alignment position will arrive at the camera.
    Type: Application
    Filed: September 27, 2017
    Publication date: September 12, 2019
    Applicant: The Trustees of Columbia University in the City of New York
    Inventors: Elizabeth M.C. HILLMAN, Venkatakaushik VOLETI