Patents by Inventor Karthik Elumalai

Karthik Elumalai 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
  • Patent number: 11421316
    Abstract: Methods and apparatus for producing fine pitch patterning on a substrate. Warpage correction of the substrate is accomplished on a carrier or carrier-less substrate. A first warpage correction process is performed on the substrate by raising and holding a temperature of the substrate to a first temperature and cooling the carrier-less substrate to a second temperature. Further wafer level packaging processing is then performed such as forming vias in a polymer layer on the substrate. A second warpage correction process is then performed on the substrate by raising and holding a temperature of the substrate to a third temperature and cooling the substrate to a fourth temperature. With the warpage of the substrate reduced, a redistribution layer may be formed on the substrate with a 2/2 ?m l/s fine pitch patterning.
    Type: Grant
    Filed: September 26, 2019
    Date of Patent: August 23, 2022
    Assignee: APPLIED MATERIALS, INC.
    Inventors: Prayudi Lianto, Mohamed Rafi, Muhammad Azim Bin Syed Sulaiman, Guan Huei See, Ang Yu Xin Kristy, Karthik Elumalai, Sriskantharajah Thirunavukarasu, Arvind Sundarrajan
  • 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: 11111583
    Abstract: Embodiments of improved substrate carriers are provided herein. In some embodiments, a substrate carrier, includes: a multi-layered disk having upper and lower layers formed of a continuous material and an electrostatic electrode structure disposed therebetween, wherein the multi-layered disk is dimensioned and arranged so as to have a nominal dimension which exceeds a nominal dimension of a standard substrate size used in the manufacture of light emitting diode devices, and wherein the multi-layered disk is formed symmetrically about a central axis and defines a substantially planar upper surface.
    Type: Grant
    Filed: November 30, 2017
    Date of Patent: September 7, 2021
    Assignee: APPLIED MATERIALS, INC.
    Inventors: Sriskantharajah Thirunavukarasu, Karthik Elumalai, Jen Sern Lew, Mingwei Zhu
  • 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
  • Publication number: 20200131624
    Abstract: Methods and apparatus for producing fine pitch patterning on a substrate. Warpage correction of the substrate is accomplished on a carrier or carrier-less substrate. A first warpage correction process is performed on the substrate by raising and holding a temperature of the substrate to a first temperature and cooling the carrier-less substrate to a second temperature. Further wafer level packaging processing is then performed such as forming vias in a polymer layer on the substrate. A second warpage correction process is then performed on the substrate by raising and holding a temperature of the substrate to a third temperature and cooling the substrate to a fourth temperature. With the warpage of the substrate reduced, a redistribution layer may be formed on the substrate with a 2/2 ?m l/s fine pitch patterning.
    Type: Application
    Filed: September 26, 2019
    Publication date: April 30, 2020
    Inventors: PRAYUDI LIANTO, MOHAMED RAFI, MUHAMMAD AZIM BIN SYED SULAIMAN, GUAN HUEI SEE, ANG YU XIN KRISTY, KARTHIK ELUMALAI, SRISKANTHARAJAH THIRUNAVUKARASU, ARVIND SUNDARRAJAN
  • Patent number: 10446423
    Abstract: Systems, apparatuses and methods for determining a surface profile of a substrate are provided. In one embodiment, a method includes projecting a signal having a vertical component/profile across the surface of the substrate from a plurality of locations along a first side of the substrate, capturing the projected signals at each of a plurality of respective locations across the surface of the substrate and determining a surface profile for the substrate using the captured signals. The process can be automated using a controller having predetermined projection and capture positions along respective sides of the substrate, where a surface profile of the substrate can be automatically determined by the controller using the captured signals.
    Type: Grant
    Filed: June 15, 2017
    Date of Patent: October 15, 2019
    Assignee: APPLIED MATERIALS, INC.
    Inventors: Jun-Liang Su, Karthik Elumalai, Eng Sheng Peh, Sriskantharajah Thirunavukarasu, Dimantha Rajapaksa
  • Patent number: 10325790
    Abstract: Embodiments of methods and apparatus for correcting substrate deformity are provided herein. In some embodiments, a substrate support includes a base having an interior volume formed by walls extending upward from the base; a plurality of infrared lamps disposed within the interior volume; a support plate disposed above the plurality of infrared lamps, wherein the support plate includes a support surface to support a substrate; and a cover plate disposed atop the support plate and having a central opening corresponding to the support surface and an exhaust portion at a periphery of a top surface of the cover plate, wherein the exhaust portion includes a plurality of perforations fluidly coupling a space above the cover plate with an exhaust conduit formed in the cover plate. Embodiments of a showerhead assembly and processing equipment incorporating the inventive substrate support and showerhead assembly are additionally provided herein.
    Type: Grant
    Filed: November 13, 2017
    Date of Patent: June 18, 2019
    Assignee: APPLIED MATERIALS, INC.
    Inventors: Eng Sheng Peh, Sriskantharajah Thirunavukarasu, Jun-Liang Su, Shoju Vayyapron, Karthik Elumalai, Dimantha Rajapaksa, Arunkumar M Tatti
  • Publication number: 20180218928
    Abstract: Embodiments of methods and apparatus for correcting substrate deformity are provided herein. In some embodiments, a substrate support includes a base having an interior volume formed by walls extending upward from the base; a plurality of infrared lamps disposed within the interior volume; a support plate disposed above the plurality of infrared lamps, wherein the support plate includes a support surface to support a substrate; and a cover plate disposed atop the support plate and having a central opening corresponding to the support surface and an exhaust portion at a periphery of a top surface of the cover plate, wherein the exhaust portion includes a plurality of perforations fluidly coupling a space above the cover plate with an exhaust conduit formed in the cover plate. Embodiments of a showerhead assembly and processing equipment incorporating the inventive substrate support and showerhead assembly are additionally provided herein.
    Type: Application
    Filed: November 13, 2017
    Publication date: August 2, 2018
    Inventors: Eng Sheng PEH, Sriskantharajah THIRUNAVUKARASU, Jun-Liang SU, Shoju VAYYAPRON, Karthik ELUMALAI, Dimantha RAJAPAKSA, Arunkumar M Tatti
  • Publication number: 20180144960
    Abstract: Systems, apparatuses and methods for determining a surface profile of a substrate are provided. In one embodiment, a method includes projecting a signal having a vertical component/profile across the surface of the substrate from a plurality of locations along a first side of the substrate, capturing the projected signals at each of a plurality of respective locations across the surface of the substrate and determining a surface profile for the substrate using the captured signals. The process can be automated using a controller having predetermined projection and capture positions along respective sides of the substrate, where a surface profile of the substrate can be automatically determined by the controller using the captured signals.
    Type: Application
    Filed: June 15, 2017
    Publication date: May 24, 2018
    Inventors: JUN-LIANG SU, KARTHIK ELUMALAI, ENG SHENG PEH, Sriskantharajah THIRUNAVUKARASU, DIMANTHA RAJAPAKSA
  • Publication number: 20180112310
    Abstract: Embodiments of improved substrate carriers are provided herein. In some embodiments, a substrate carrier, includes: a multi-layered disk having upper and lower layers formed of a continuous material and an electrostatic electrode structure disposed therebetween, wherein the multi-layered disk is dimensioned and arranged so as to have a nominal dimension which exceeds a nominal dimension of a standard substrate size used in the manufacture of light emitting diode devices, and wherein the multi-layered disk is formed symmetrically about a central axis and defines a substantially planar upper surface.
    Type: Application
    Filed: November 30, 2017
    Publication date: April 26, 2018
    Inventors: SRISKANTHARAJAH THIRUNAVUKARASU, KARTHIK ELUMALAI, JEN SERN LEW, MINGWEI ZHU
  • Patent number: 9845533
    Abstract: Embodiments of improved substrate carriers are provided herein. In some embodiments, a substrate carrier, includes: a multi-layered disk having upper and lower layers formed of a continuous material and an electrostatic electrode structure disposed therebetween, wherein the multi-layered disk is dimensioned and arranged so as to have a nominal dimension which exceeds a nominal dimension of a standard substrate size used in the manufacture of light emitting diode devices, and wherein the multi-layered disk is formed symmetrically about a central axis and defines a substantially planar upper surface.
    Type: Grant
    Filed: November 11, 2014
    Date of Patent: December 19, 2017
    Assignee: APPLIED MATERIALS, INC.
    Inventors: Sriskantharajah Thirunavukarasu, Karthik Elumalai, Jen Sern Lew, Mingwei Zhu
  • Patent number: 9818624
    Abstract: Embodiments of methods and apparatus for correcting substrate deformity are provided herein. In some embodiments, a substrate flattening system includes: a first process chamber having a first substrate support and a first showerhead, wherein the first substrate support does not include a chucking mechanism; a first heater disposed in the first substrate support to heat a substrate placed on a first support surface of the first substrate support; a second heater configured to heat a process gas flowing through the first showerhead into a first processing volume of the first process chamber; and a second process chamber having a second substrate support, wherein the second substrate support is not heated, and wherein the first process chamber and the cooling chamber are both non-vacuum chambers.
    Type: Grant
    Filed: April 29, 2016
    Date of Patent: November 14, 2017
    Assignee: APPLIED MATERIALS, INC.
    Inventors: Jen Sern Lew, Tuck Foong Koh, Sriskantharajah Thirunavukarasu, Karthik Elumalai, Eng Sheng Peh, Jun-Liang Su
  • Patent number: 9740111
    Abstract: An electrostatic carrier is described for carrying a substrate for handling through different processes. The carrier has a dielectric plate having a top side and a bottom side and configured to be attached on a top side of the plate to a substrate using electrostatic force, and a base plate coupled to a bottom side of the dielectric plate. Electrodes are formed on the base plate and extend across the base plate parallel to the top side of the dielectric plate. The electrodes are configured to carry an electrostatic charge and formed so that electrodes of a first charge are positioned near electrodes of a second charge. Connectors extend through the base plate to the electrodes to couple the electrodes to a source of electrostatic charge.
    Type: Grant
    Filed: May 16, 2014
    Date of Patent: August 22, 2017
    Assignee: Applied Materials, Inc.
    Inventors: Arvind Sundarrajan, Jen Sern Lew, Sriskantharajah Thirunavukarasu, Karthik Elumalai
  • Publication number: 20160322234
    Abstract: Embodiments of methods and apparatus for correcting substrate deformity are provided herein. In some embodiments, a substrate flattening system includes: a first process chamber having a first substrate support and a first showerhead, wherein the first substrate support does not include a chucking mechanism; a first heater disposed in the first substrate support to heat a substrate placed on a first support surface of the first substrate support; a second heater configured to heat a process gas flowing through the first showerhead into a first processing volume of the first process chamber; and a second process chamber having a second substrate support, wherein the second substrate support is not heated, and wherein the first process chamber and the cooling chamber are both non-vacuum chambers.
    Type: Application
    Filed: April 29, 2016
    Publication date: November 3, 2016
    Inventors: Jen Sern LEW, Tuck Foong KOH, Sriskantharajah THIRUNAVUKARASU, Karthik ELUMALAI, ENG SHENG PEH, JUN-LIANG SU
  • Patent number: 9478697
    Abstract: In some embodiments, a substrate carrier for holding a plurality of substrates comprises a disk formed of a continuous material to a nominal dimension which is approximately a multiple of a nominal dimension of a standard substrate size used in the manufacture of light emitting diode devices. In an embodiment, the disk is formed symmetrically about a central axis and defines a substantially planar upper surface. A first pair of pockets is defined in the upper surface of the disk, wherein the disk and each of the first pair of pockets are bisected by a first reference plane passing through the central axis. A second pair of pockets is defined in the upper surface of the disk, wherein the disk and each of the second pair of pockets are bisected by a second reference plane passing through the central axis.
    Type: Grant
    Filed: November 11, 2014
    Date of Patent: October 25, 2016
    Assignee: APPLIED MATERIALS, INC.
    Inventors: Sriskantharajah Thirunavukarasu, Mingwei Zhu, Karthik Elumalai, Thean Ming Tan, Yong Cao, Daniel Lee Diehl, Nag Patibandla
  • Publication number: 20160133782
    Abstract: Embodiments of improved substrate carriers are provided herein. In some embodiments, a substrate carrier, includes: a multi-layered disk having upper and lower layers formed of a continuous material and an electrostatic electrode structure disposed therebetween, wherein the multi-layered disk is dimensioned and arranged so as to have a nominal dimension which exceeds a nominal dimension of a standard substrate size used in the manufacture of light emitting diode devices, and wherein the multi-layered disk is formed symmetrically about a central axis and defines a substantially planar upper surface.
    Type: Application
    Filed: November 11, 2014
    Publication date: May 12, 2016
    Inventors: SRISKANTHARAJAH THIRUNAVUKARASU, KARTHIK ELUMALAI, JEN SERN LEW, MINGWEI ZHU