Patents by Inventor Eng Sheng Peh

Eng Sheng Peh 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).

  • Patent number: 11721583
    Abstract: In an embodiment, a semiconductor processing tool for implementing hybrid laser and plasma dicing of a substrate is provided. The semiconductor processing tool comprises a transfer module, where the transfer module comprises a track robot for handling the substrate, and a loadlock attached to the transfer module. In an embodiment, the loadlock comprises a linear transfer system for handling the substrate. In an embodiment, the processing tool further comprises a processing chamber attached to the loadlock, wherein the linear transfer system of the loadlock is configured to insert and remove the substrate from the processing chamber.
    Type: Grant
    Filed: August 10, 2020
    Date of Patent: August 8, 2023
    Assignee: Applied Materials, Inc.
    Inventors: Sriskantharajah Thirunavukarasu, Karthik Balakrishnan, Karthik Elumalai, Eng Sheng Peh
  • Publication number: 20230187215
    Abstract: Electrostatic chucks with reduced current leakage and methods of dicing semiconductor wafers are described. In an example, an etch apparatus includes a chamber, and a plasma source within or coupled to the chamber. An electrostatic chuck is within the chamber. The electrostatic chuck includes a conductive pedestal having a plurality of notches at a circumferential edge thereof. The electrostatic chuck also includes a plurality of lift pins corresponding to ones of the plurality of notches.
    Type: Application
    Filed: February 6, 2023
    Publication date: June 15, 2023
    Inventors: Sai Abhinand, Michael Sorensen, Karthik Elumalai, Dimantha Rajapaksa, Cheng Sun, James S. Papanu, Gaurav Mehta, Eng Sheng Peh, Sri Thirunavukarasu, Onkara Korasiddaramaiah
  • Patent number: 11600492
    Abstract: Electrostatic chucks with reduced current leakage and methods of dicing semiconductor wafers are described. In an example, an etch apparatus includes a chamber, and a plasma source within or coupled to the chamber. An electrostatic chuck is within the chamber. The electrostatic chuck includes a conductive pedestal having a plurality of notches at a circumferential edge thereof. The electrostatic chuck also includes a plurality of lift pins corresponding to ones of the plurality of notches.
    Type: Grant
    Filed: December 10, 2019
    Date of Patent: March 7, 2023
    Assignee: Applied Materials, Inc.
    Inventors: Sai Abhinand, Michael Sorensen, Karthik Elumalai, Dimantha Rajapaksa, Cheng Sun, James S. Papanu, Gaurav Mehta, Eng Sheng Peh, Sri Thirunavukarasu, Onkara Korasiddaramaiah
  • Publication number: 20220319847
    Abstract: Methods and apparatus for laser patterning leverage mask trench debris removal techniques to form etch singulation trenches. In some embodiments, the method includes forming a mask layer on the wafer, forming a pattern in the mask layer using a laser of a laser assembly where the pattern allows singulation of the wafer by deep etching and forms a trench in the mask layer with a laser beam which has a process point at a bottom of the trench, directing gas nozzles that flow a pressurized gas at the process point in the trench as the pattern is formed with a gas flow angle relative to the process point and evacuating debris from the trench using an area of negative pressure where the gas flow from gas nozzles and the area of negative pressure are in fluid contact and are confined within a cylindrical housing.
    Type: Application
    Filed: March 31, 2021
    Publication date: October 6, 2022
    Inventors: Karthik Narayanan BALAKRISHNAN, Jungrae PARK, Arunkumar TATTI, Sriskantharajah THIRUNAVUKARASU, Eng Sheng PEH
  • Publication number: 20220246476
    Abstract: Methods of dicing semiconductor wafers, each wafer having a plurality of integrated circuits, are described. In an example, a method of dicing a semiconductor wafer having a plurality of integrated circuits involves forming a mask above the semiconductor wafer, the mask composed of a layer covering and protecting the integrated circuits. The mask is then patterned with an actively-focused laser beam laser scribing process to provide a patterned mask with gaps, exposing regions of the semiconductor wafer between the integrated circuits. The semiconductor wafer is then plasma etched through the gaps in the patterned mask to singulate the integrated circuits.
    Type: Application
    Filed: April 22, 2022
    Publication date: August 4, 2022
    Inventors: Karthik Balakrishnan, Jungrae Park, Sriskantharajah Thirunavukarasu, Eng Sheng Peh
  • Patent number: 11342226
    Abstract: Methods of dicing semiconductor wafers, each wafer having a plurality of integrated circuits, are described. In an example, a method of dicing a semiconductor wafer having a plurality of integrated circuits involves forming a mask above the semiconductor wafer, the mask composed of a layer covering and protecting the integrated circuits. The mask is then patterned with an actively-focused laser beam laser scribing process to provide a patterned mask with gaps, exposing regions of the semiconductor wafer between the integrated circuits. The semiconductor wafer is then plasma etched through the gaps in the patterned mask to singulate the integrated circuits.
    Type: Grant
    Filed: August 13, 2019
    Date of Patent: May 24, 2022
    Assignee: Applied Materials, Inc.
    Inventors: Karthik Balakrishnan, Jungrae Park, Sriskantharajah Thirunavukarasu, Eng Sheng Peh
  • Patent number: 11302549
    Abstract: Embodiments of substrate transfer apparatus are provided herein. In some embodiments, an apparatus for storing and transporting at least one substrate in a vacuum includes a carrying case for storing one or more substrates, wherein the carrying case includes a vacuum port and a plurality of holders to hold one or more substrates within an inner volume of the carrying case; and a vacuum source in fluid connection with the carrying case via the vacuum port.
    Type: Grant
    Filed: June 5, 2019
    Date of Patent: April 12, 2022
    Assignee: APPLIED MATERIALS, INC.
    Inventors: Sriskantharajah Thirunavukarasu, Eng Sheng Peh, Srinivas D. Nemani, Arvind Sundarrajan, Avinash Avula, Ellie Y. Yieh
  • Publication number: 20220108908
    Abstract: Shadow ring kits and methods of dicing semiconductor wafers are described. In an example, an etch apparatus includes a chamber, and a plasma source within or coupled to the chamber. An electrostatic chuck is within the chamber, the electrostatic chuck including a conductive pedestal to support a substrate carrier sized to support a wafer having a first diameter. A shadow ring assembly is between the plasma source and the electrostatic chuck, the shadow ring assembly sized to process a wafer having a second diameter smaller than the first diameter.
    Type: Application
    Filed: October 6, 2020
    Publication date: April 7, 2022
    Inventors: Karthik Elumalai, Eng Sheng Peh, Michael Sorensen, Sriskantharajah Thirunavukarasu, Arunkumar Tatti
  • Publication number: 20220044968
    Abstract: In an embodiment, a semiconductor processing tool for implementing hybrid laser and plasma dicing of a substrate is provided. The semiconductor processing tool comprises a transfer module, where the transfer module comprises a track robot for handling the substrate, and a loadlock attached to the transfer module. In an embodiment, the loadlock comprises a linear transfer system for handling the substrate. In an embodiment, the processing tool further comprises a processing chamber attached to the loadlock, wherein the linear transfer system of the loadlock is configured to insert and remove the substrate from the processing chamber.
    Type: Application
    Filed: August 10, 2020
    Publication date: February 10, 2022
    Inventors: Sriskantharajah Thirunavukarasu, Karthik Balakrishnan, Karthik Elumalai, Eng Sheng Peh
  • Patent number: 11053590
    Abstract: A nozzle for uniform plasma processing comprises an inlet portion and an outlet portion. The inlet portion has a side surface substantially parallel to a vertical axis. The inlet portion comprises a plurality of gas channels. The outlet portion is coupled to the inlet portion. The outlet portion comprises a plurality of outlets. At least one of the outlets is at an angle other than a right angle relative to the vertical axis.
    Type: Grant
    Filed: September 26, 2019
    Date of Patent: July 6, 2021
    Assignee: Applied Materials, Inc.
    Inventors: Rohit Mishra, Siva Suri Chandra Rao Bhesetti, Eng Sheng Peh, Sriskantharajah Thirunavukarasu, Shoju Vayyapron, Cheng Sun
  • Publication number: 20210175086
    Abstract: Electrostatic chucks with reduced current leakage and methods of dicing semiconductor wafers are described. In an example, an etch apparatus includes a chamber, and a plasma source within or coupled to the chamber. An electrostatic chuck is within the chamber. The electrostatic chuck includes a conductive pedestal having a plurality of notches at a circumferential edge thereof. The electrostatic chuck also includes a plurality of lift pins corresponding to ones of the plurality of notches.
    Type: Application
    Filed: December 10, 2019
    Publication date: June 10, 2021
    Inventors: Sai Abhinand, Michael Sorensen, Karthik Elumalai, Dimantha Rajapaksa, Cheng Sun, James S. Papanu, Gaurav Mehta, Eng Sheng Peh, Sri Thirunavukarasu, Onkara Korasiddaramaiah
  • Patent number: 10930542
    Abstract: Embodiments of methods and apparatus for handling substrates of different sizes are provided herein. In some embodiments, an apparatus for handling substrates of different sizes includes: a pair of end effectors having a first set of contact pads configured to support a substrate having a first size and a second set of contact pads configured to support a substrate having a second size, smaller than the first size.
    Type: Grant
    Filed: February 11, 2019
    Date of Patent: February 23, 2021
    Assignee: APPLIED MATERIALS, INC.
    Inventors: Sriskantharajah Thirunavukarasu, Eng Sheng Peh, Karrthik Parathithasan, Fang Jie Lim
  • Publication number: 20210050262
    Abstract: Methods of dicing semiconductor wafers, each wafer having a plurality of integrated circuits, are described. In an example, a method of dicing a semiconductor wafer having a plurality of integrated circuits involves forming a mask above the semiconductor wafer, the mask composed of a layer covering and protecting the integrated circuits. The mask is then patterned with an actively-focused laser beam laser scribing process to provide a patterned mask with gaps, exposing regions of the semiconductor wafer between the integrated circuits. The semiconductor wafer is then plasma etched through the gaps in the patterned mask to singulate the integrated circuits.
    Type: Application
    Filed: August 13, 2019
    Publication date: February 18, 2021
    Inventors: Karthik Balakrishnan, Jungrae Park, Sriskantharajah Thirunavukarasu, Eng Sheng Peh
  • Patent number: 10784134
    Abstract: Methods and apparatus for detecting warpage in a substrate are provided herein. In some embodiments, a warpage detector for detecting warpage in substrates includes: one or more light sources to illuminate one or more substrates when present; a camera for capturing images of exposed portions of one or more substrates when present; a motion assembly having a mounting stage for supporting the camera; and a data acquisition interface (DAI) coupled to the camera to process substrate images and detect warpage of substrates based upon the processed substrate images.
    Type: Grant
    Filed: April 20, 2018
    Date of Patent: September 22, 2020
    Assignee: APPLIED MATERIALS, INC.
    Inventors: Eng Sheng Peh, Karthik Balakrishnan, Sriskantharajah Thirunavukarasu
  • Patent number: 10777442
    Abstract: Embodiments of a hybrid substrate carrier are provided herein. In some embodiments, a substrate carrier includes: a carrier ring having an inner ledge adjacent a central opening of the carrier ring; and a carrier plate having a diameter greater than central opening and configured to rest upon the inner ledge, wherein the carrier plate includes an electrode disposed beneath a support surface to electrostatically clamp a substrate to the support surface of the carrier plate.
    Type: Grant
    Filed: November 16, 2017
    Date of Patent: September 15, 2020
    Assignee: APPLIED MATERIALS, INC.
    Inventors: Sriskantharajah Thirunavukarasu, Shoju Vayyapron, Anand Mahadev, Shankeerthan Kalyanasundaram, Eng Sheng Peh
  • Patent number: 10566226
    Abstract: Embodiments of multi-cassette carrying cases are provided herein. In some embodiments a multi-cassette carrying case includes: a body having an inner volume; a door coupled to the body to selectively seal off the inner volume; and a plurality of cassette holders disposed in the inner volume to hold one or more substrate cassettes. In some embodiments, a method of transferring substrates includes: placing a substrate in a substrate cassette, wherein an inner volume of the substrate cassette is sealed from an environment outside of the substrate cassette; and placing the substrate cassette in a multi-cassette carrying case.
    Type: Grant
    Filed: November 5, 2015
    Date of Patent: February 18, 2020
    Assignee: APPLIED MATERIALS, INC.
    Inventors: Sriskantharajah Thirunavukarasu, Eng Sheng Peh, Srinivas D. Nemani, Arvind Sundarrajan, Avinash Avula, Ellie Y. Yieh, Michael Rice, Ginetto Addiego
  • Publication number: 20200017972
    Abstract: A nozzle for uniform plasma processing comprises an inlet portion and an outlet portion. The inlet portion has a side surface substantially parallel to a vertical axis. The inlet portion comprises a plurality of gas channels. The outlet portion is coupled to the inlet portion. The outlet portion comprises a plurality of outlets. At least one of the outlets is at an angle other than a right angle relative to the vertical axis.
    Type: Application
    Filed: September 26, 2019
    Publication date: January 16, 2020
    Inventors: Rohit Mishra, Siva Suri Chandra Rao Bhesetti, Eng Sheng Peh, Sriskantharajah Thirunavukarasu, Shoju Vayyapron, Cheng Sun
  • Patent number: 10504762
    Abstract: A bridging front opening unified pod (FOUP) is provided herein. In some embodiments, the bridging FOUP includes a bottom floor, side walls, a ceiling and a back wall that forms an enclosure volume having a front opening, a plurality of supports coupled to the side walls and extending into the enclosure volume, wherein the plurality of supports are configured to support a substrate carrier, a base plate assembly comprising a base plate coupled to the bottom floor, a pair of L-brackets coupled to the base plate, wherein each L-brackets includes a short lift pin, a long lift pin coupled to the base plate, wherein the height of the short lift pins and the long lift pin is selected such that the substrate is kept level when disposed thereon, and a docking support disposed proximate the base plate assembly and configured to support a substrate carrier.
    Type: Grant
    Filed: April 18, 2018
    Date of Patent: December 10, 2019
    Assignee: APPLIED MATERIALS, INC.
    Inventors: Karrthik Parathithasan, Fang Jie Lim, Sriskantharajah Thirunavukarasu, Eng Sheng Peh
  • Patent number: 10465288
    Abstract: A nozzle for uniform plasma processing comprises an inlet portion and an outlet portion. The inlet portion has a side surface substantially parallel to a vertical axis. The inlet portion comprises a plurality of gas channels. The outlet portion is coupled to the inlet portion. The outlet portion comprises a plurality of outlets. At least one of the outlets is at an angle other than a right angle relative to the vertical axis.
    Type: Grant
    Filed: August 15, 2014
    Date of Patent: November 5, 2019
    Assignee: Applied Materials, Inc.
    Inventors: Rohit Mishra, Siva Suri Chandra Rao Bhesetti, Eng Sheng Peh, Sriskantharajah Thirunavukarasu, Shoju Vayyapron, Cheng Sun
  • Publication number: 20190326147
    Abstract: Embodiments of a multi-cassette carrying case are provided herein. In some embodiments a method for transporting a substrate from a first processing device to a second processing device includes docking a substrate cassette to a first chamber; pumping down pressure in the substrate cassette; transferring a substrate through the first chamber to the substrate cassette; sealing the substrate cassette and moving the substrate cassette having the substrate disposed therein from the first chamber to a second chamber; docking the substrate cassette to the second chamber; and transferring the substrate from the substrate cassette through the second chamber.
    Type: Application
    Filed: June 5, 2019
    Publication date: October 24, 2019
    Inventors: SRISKANTHARAJAH THIRUNAVUKARASU, ENG SHENG PEH, SRINIVAS D. NEMANI, ARVIND SUNDARRAJAN, AVINASH AVULA, ELLIE Y. YIEH, MICHAEL RICE, GINETTO ADDIEGO