Patents by Inventor Rao Yalamanchili

Rao Yalamanchili 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: 11915932
    Abstract: Exemplary etching methods may include forming a plasma of a fluorine-containing precursor to produce plasma effluents. A first bias frequency may be applied while forming the plasma. The methods may include contacting a substrate housed in a processing region of a semiconductor processing chamber with the plasma effluents. The substrate may be or include a photomask. The methods may include etching a first layer of the photomask. Etching the first layer of the photomask may expose a second layer of the photomask. The methods may include adjusting the first bias frequency to a second bias frequency while maintaining the plasma of the fluorine-containing precursor. The methods may include etching the second layer of the photomask.
    Type: Grant
    Filed: April 28, 2021
    Date of Patent: February 27, 2024
    Assignee: Applied Materials, Inc.
    Inventors: Toi Yue Becky Leung, Madhavi Rajaram Chandrachood, Madhava Rao Yalamanchili
  • Publication number: 20230207393
    Abstract: Methods of dicing semiconductor wafers, each wafer having a plurality of integrated circuits, are described. A method includes forming a mask above the semiconductor wafer, the mask including a layer covering and protecting the integrated circuits. The mask and a portion of the semiconductor wafer are patterned with a laser scribing process to provide a patterned mask and to form trenches partially into but not through the semiconductor wafer between the integrated circuits. Each of the trenches has a width. The semiconductor wafer is plasma etched through the trenches to form corresponding trench extensions and to singulate the integrated circuits. Each of the corresponding trench extensions has the width.
    Type: Application
    Filed: March 2, 2023
    Publication date: June 29, 2023
    Inventors: Wei-Sheng Lei, Brad Eaton, Madhava Rao Yalamanchili, Saravjeet Singh, Ajay Kumar, James M. Holden
  • Patent number: 11621194
    Abstract: Methods of dicing semiconductor wafers, each wafer having a plurality of integrated circuits, are described. A method includes forming a mask above the semiconductor wafer, the mask including a layer covering and protecting the integrated circuits. The mask and a portion of the semiconductor wafer are patterned with a laser scribing process to provide a patterned mask and to form trenches partially into but not through the semiconductor wafer between the integrated circuits. Each of the trenches has a width. The semiconductor wafer is plasma etched through the trenches to form corresponding trench extensions and to singulate the integrated circuits. Each of the corresponding trench extensions has the width.
    Type: Grant
    Filed: December 29, 2020
    Date of Patent: April 4, 2023
    Assignee: Applied Materials, Inc.
    Inventors: Wei-Sheng Lei, Brad Eaton, Madhava Rao Yalamanchili, Saravjeet Singh, Ajay Kumar, James M. Holden
  • Publication number: 20220351972
    Abstract: Exemplary etching methods may include forming a plasma of a fluorine-containing precursor to produce plasma effluents. A first bias frequency may be applied while forming the plasma. The methods may include contacting a substrate housed in a processing region of a semiconductor processing chamber with the plasma effluents. The substrate may be or include a photomask. The methods may include etching a first layer of the photomask. Etching the first layer of the photomask may expose a second layer of the photomask. The methods may include adjusting the first bias frequency to a second bias frequency while maintaining the plasma of the fluorine-containing precursor. The methods may include etching the second layer of the photomask.
    Type: Application
    Filed: April 28, 2021
    Publication date: November 3, 2022
    Applicant: Applied Materials, Inc.
    Inventors: Toi Yue Becky Leung, Madhavi Rajaram Chandrachood, Madhava Rao Yalamanchili
  • Publication number: 20210134676
    Abstract: Methods of dicing semiconductor wafers, each wafer having a plurality of integrated circuits, are described. A method includes forming a mask above the semiconductor wafer, the mask including a layer covering and protecting the integrated circuits. The mask and a portion of the semiconductor wafer are patterned with a laser scribing process to provide a patterned mask and to form trenches partially into but not through the semiconductor wafer between the integrated circuits. Each of the trenches has a width. The semiconductor wafer is plasma etched through the trenches to form corresponding trench extensions and to singulate the integrated circuits. Each of the corresponding trench extensions has the width.
    Type: Application
    Filed: December 29, 2020
    Publication date: May 6, 2021
    Inventors: Wei-Sheng Lei, Brad Eaton, Madhava Rao Yalamanchili, Saravjeet Singh, Ajay Kumar, James M. Holden
  • Patent number: 10910271
    Abstract: Methods of dicing semiconductor wafers, each wafer having a plurality of integrated circuits, are described. A method includes forming a mask above the semiconductor wafer, the mask including a layer covering and protecting the integrated circuits. The mask and a portion of the semiconductor wafer are patterned with a laser scribing process to provide a patterned mask and to form trenches partially into but not through the semiconductor wafer between the integrated circuits. Each of the trenches has a width. The semiconductor wafer is plasma etched through the trenches to form corresponding trench extensions and to singulate the integrated circuits. Each of the corresponding trench extensions has the width.
    Type: Grant
    Filed: May 27, 2020
    Date of Patent: February 2, 2021
    Assignee: Applied Materials, Inc.
    Inventors: Wei-Sheng Lei, Brad Eaton, Madhava Rao Yalamanchili, Saravjeet Singh, Ajay Kumar, James M. Holden
  • Publication number: 20200286787
    Abstract: Methods of dicing semiconductor wafers, each wafer having a plurality of integrated circuits, are described. A method includes forming a mask above the semiconductor wafer, the mask including a layer covering and protecting the integrated circuits. The mask and a portion of the semiconductor wafer are patterned with a laser scribing process to provide a patterned mask and to form trenches partially into but not through the semiconductor wafer between the integrated circuits. Each of the trenches has a width. The semiconductor wafer is plasma etched through the trenches to form corresponding trench extensions and to singulate the integrated circuits. Each of the corresponding trench extensions has the width.
    Type: Application
    Filed: May 27, 2020
    Publication date: September 10, 2020
    Inventors: Wei-Sheng Lei, Brad Eaton, Madhava Rao Yalamanchili, Saravjeet Singh, Ajay Kumar, James M. Holden
  • Patent number: 10714390
    Abstract: Methods of dicing semiconductor wafers, each wafer having a plurality of integrated circuits, are described. A method includes forming a mask above the semiconductor wafer, the mask including a layer covering and protecting the integrated circuits. The mask and a portion of the semiconductor wafer are patterned with a laser scribing process to provide a patterned mask and to form trenches partially into but not through the semiconductor wafer between the integrated circuits. Each of the trenches has a width. The semiconductor wafer is plasma etched through the trenches to form corresponding trench extensions and to singulate the integrated circuits. Each of the corresponding trench extensions has the width.
    Type: Grant
    Filed: December 6, 2019
    Date of Patent: July 14, 2020
    Assignee: Applied Materials, Inc.
    Inventors: Wei-Sheng Lei, Brad Eaton, Madhava Rao Yalamanchili, Saravjeet Singh, Ajay Kumar, James M. Holden
  • Publication number: 20200118880
    Abstract: Methods of dicing semiconductor wafers, each wafer having a plurality of integrated circuits, are described. A method includes forming a mask above the semiconductor wafer, the mask including a layer covering and protecting the integrated circuits. The mask and a portion of the semiconductor wafer are patterned with a laser scribing process to provide a patterned mask and to form trenches partially into but not through the semiconductor wafer between the integrated circuits. Each of the trenches has a width. The semiconductor wafer is plasma etched through the trenches to form corresponding trench extensions and to singulate the integrated circuits. Each of the corresponding trench extensions has the width.
    Type: Application
    Filed: December 6, 2019
    Publication date: April 16, 2020
    Inventors: Wei-Sheng Lei, Brad Eaton, Madhava Rao Yalamanchili, Saravjeet Singh, Ajay Kumar, James M. Holden
  • Patent number: 10566238
    Abstract: Methods of dicing semiconductor wafers, each wafer having a plurality of integrated circuits, are described. A method includes forming a mask above the semiconductor wafer, the mask including a layer covering and protecting the integrated circuits. The mask and a portion of the semiconductor wafer are patterned with a laser scribing process to provide a patterned mask and to form trenches partially into but not through the semiconductor wafer between the integrated circuits. Each of the trenches has a width. The semiconductor wafer is plasma etched through the trenches to form corresponding trench extensions and to singulate the integrated circuits. Each of the corresponding trench extensions has the width.
    Type: Grant
    Filed: November 16, 2018
    Date of Patent: February 18, 2020
    Assignee: Applied Materials, Inc.
    Inventors: Wei-Sheng Lei, Brad Eaton, Madhava Rao Yalamanchili, Saravjeet Singh, Ajay Kumar, James M. Holden
  • Publication number: 20190088549
    Abstract: Methods of dicing semiconductor wafers, each wafer having a plurality of integrated circuits, are described. A method includes forming a mask above the semiconductor wafer, the mask including a layer covering and protecting the integrated circuits. The mask and a portion of the semiconductor wafer are patterned with a laser scribing process to provide a patterned mask and to form trenches partially into but not through the semiconductor wafer between the integrated circuits. Each of the trenches has a width. The semiconductor wafer is plasma etched through the trenches to form corresponding trench extensions and to singulate the integrated circuits. Each of the corresponding trench extensions has the width.
    Type: Application
    Filed: November 16, 2018
    Publication date: March 21, 2019
    Inventors: Wei-Sheng Lei, Brad Eaton, Madhava Rao Yalamanchili, Saravjeet Singh, Ajay Kumar, James M. Holden
  • Patent number: 10163713
    Abstract: Methods of dicing semiconductor wafers, each wafer having a plurality of integrated circuits, are described. A method includes forming a mask above the semiconductor wafer, the mask including a layer covering and protecting the integrated circuits. The mask and a portion of the semiconductor wafer are patterned with a laser scribing process to provide a patterned mask and to form trenches partially into but not through the semiconductor wafer between the integrated circuits. Each of the trenches has a width. The semiconductor wafer is plasma etched through the trenches to form corresponding trench extensions and to singulate the integrated circuits. Each of the corresponding trench extensions has the width.
    Type: Grant
    Filed: January 25, 2016
    Date of Patent: December 25, 2018
    Assignee: Applied Materials, Inc.
    Inventors: Wei-Sheng Lei, Brad Eaton, Madhava Rao Yalamanchili, Saravjeet Singh, Ajay Kumar, James M. Holden
  • Patent number: 10147531
    Abstract: The present disclosure includes an electrical power transformer that may include a core and a conductor pack. A conductor pack may include a conducting layer disposed around a portion of the core, a first planar insulating layer disposed on a first side of the conducting layer, and a second planar insulating layer disposed on a second side of the conducting layer. A cooling member may be disposed adjacent to the conductor pack. A method of manufacturing an electrical power transformer may include providing a core and providing a plurality of planar conductor packs. The planar conductor packs including a plurality of planar conducting layers and a plurality of planar insulating layers. The method may include inserting a cooling member between insulating layers of adjacent ones of the plurality of planar conductor packs.
    Type: Grant
    Filed: April 8, 2015
    Date of Patent: December 4, 2018
    Assignee: Lear Corporation
    Inventors: Rutunj Rai, Venkat Rao Yalamanchili, Parminder Brar, Michael Scott Duco
  • Patent number: 9620379
    Abstract: Methods of dicing substrates having a plurality of ICs. A method includes forming a multi-layered mask comprising a laser energy absorbing, non-photodefinable topcoat disposed over a water-soluble base layer disposed over the semiconductor substrate. Because the laser light absorbing material layer is non-photodefinable, material costs associated with conventional photo resist formulations may be avoided. The mask is direct-write patterned with a laser scribing process to provide a patterned mask with gaps. The patterning exposes regions of the substrate between the ICs. Absorption of the mask layer within the laser emission band (e.g., UV band and/or green band) promotes good scribe line quality. The substrate may then be plasma etched through the gaps in the patterned mask to singulate the IC with the mask protecting the ICs during the plasma etch. The soluble base layer of the mask may then be dissolved subsequent to singulation, facilitating removal of the layer.
    Type: Grant
    Filed: March 11, 2014
    Date of Patent: April 11, 2017
    Assignee: Applied Materials, Inc.
    Inventors: Wei-Sheng Lei, Mohammad Kamruzzaman Chowdhury, Todd Egan, Brad Eaton, Madhava Rao Yalamanchili, Ajay Kumar
  • Patent number: 9465677
    Abstract: A partitioned application environment is disclosed. In various embodiments, a request associated with an application environment in which an application is running is received from the application. A determination is made to fulfill the request at least in part via a call to a node at which application code associated with the application is running in an application environment partition provided at the node. A call associated with the request is sent to the node, based at least in part on the determination.
    Type: Grant
    Filed: March 31, 2016
    Date of Patent: October 11, 2016
    Assignee: MOBILE IRON, INC.
    Inventors: Aaditya Chandrasekhar, Maksim Orlovich, Rama Rao Yalamanchili, Lawrence Lee, Jack Wu
  • Publication number: 20160254085
    Abstract: The present disclosure includes an electrical power transformer that may include a core and a conductor pack. A conductor pack may include a conducting layer disposed around a portion of the core, a first planar insulating layer disposed on a first side of the conducting layer, and a second planar insulating layer disposed on a second side of the conducting layer. A cooling member may be disposed adjacent to the conductor pack. A method of manufacturing an electrical power transformer may include providing a core and providing a plurality of planar conductor packs. The planar conductor packs including a plurality of planar conducting layers and a plurality of planar insulating layers. The method may include inserting a cooling member between insulating layers of adjacent ones of the plurality of planar conductor packs.
    Type: Application
    Filed: April 8, 2015
    Publication date: September 1, 2016
    Inventors: Rutunj Rai, Venkat Rao Yalamanchili, Parminder Brar, Michael Scott Duco
  • Publication number: 20160217019
    Abstract: A partitioned application environment is disclosed. In various embodiments, a request associated with an application environment in which an application is running is received from the application. A determination is made to fulfill the request at least in part via a call to a node at which application code associated with the application is running in an application environment partition provided at the node. A call associated with the request is sent to the node, based at least in part on the determination.
    Type: Application
    Filed: March 31, 2016
    Publication date: July 28, 2016
    Inventors: Aaditya Chandrasekhar, Maksim Orlovich, Rama Rao Yalamanchili, Lawrence Lee, Jack Wu
  • Patent number: 9348678
    Abstract: A partitioned application environment is disclosed. In various embodiments, a request associated with an application environment in which an application is running is received from the application. A determination is made to fulfill the request at least in part via a call to a node at which application code associated with the application is running in an application environment partition provided at the node. A call associated with the request is sent to the node, based at least in part on the determination.
    Type: Grant
    Filed: June 19, 2013
    Date of Patent: May 24, 2016
    Assignee: MOBILE IRON, INC.
    Inventors: Aaditya Chandrasekhar, Maksim Orlovich, Rama Rao Yalamanchili, Lawrence Lee, Jack Wu
  • Publication number: 20160141210
    Abstract: Methods of dicing semiconductor wafers, each wafer having a plurality of integrated circuits, are described. A method includes forming a mask above the semiconductor wafer, the mask including a layer covering and protecting the integrated circuits. The mask and a portion of the semiconductor wafer are patterned with a laser scribing process to provide a patterned mask and to form trenches partially into but not through the semiconductor wafer between the integrated circuits. Each of the trenches has a width. The semiconductor wafer is plasma etched through the trenches to for corresponding trench extensions and to singulate the integrated circuits. Each of the corresponding trench extensions has the width.
    Type: Application
    Filed: January 25, 2016
    Publication date: May 19, 2016
    Inventors: Wei-Sheng Lei, Brad Eaton, Madhava Rao Yalamanchili, Saravjeet Singh, Ajay Kumar, James M. Holden
  • Patent number: 9280051
    Abstract: Methods for reducing line width roughness and/or critical dimension nonuniformity in a photoresist pattern are provided herein. In some embodiments, a method of reducing line width roughness along a sidewall of a patterned photoresist layer disposed atop a substrate includes: (a) depositing a first layer atop the sidewall of the patterned photoresist layer; (b) etching the first layer and the sidewall after depositing the first layer to reduce the line width roughness of the patterned photoresist layer. In some embodiments, (a)-(b) may be repeated until the line width roughness is substantially smooth.
    Type: Grant
    Filed: June 11, 2014
    Date of Patent: March 8, 2016
    Assignee: APPLIED MATERIALS, INC.
    Inventors: Banqiu Wu, Ajay Kumar, Rao Yalamanchili, Omkaram Nalamasu