Patents by Inventor Siddharth Harikrishna Mohan

Siddharth Harikrishna Mohan 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: 11121322
    Abstract: Systems and arrangements of OVJP deposition devices are provided, in which one or more organic material crucibles are directly attached to an injection block and a print head without the need for external delivery components such as feedtubes. Each crucible may be hermetically sealed until it is attached to the injection block, allowing for a single device to provide for storage, transport, and deposition of the organic material.
    Type: Grant
    Filed: November 20, 2019
    Date of Patent: September 14, 2021
    Assignee: Universal Display Corporation
    Inventors: Matthew King, William E. Quinn, Gregory McGraw, Siddharth Harikrishna Mohan, Elliot H. Hartford, Benjamin Swedlove, Gregg Kottas, Tomasz Trojacki, Julia J. Brown
  • Publication number: 20210254207
    Abstract: A microfluidic device for use with a microfluidic delivery system, such as an organic vapor jet printing device, includes a glass layer that is directly bonded to a microfabricated die and a metal plate via a double anodic bond. The double anodic bond is formed by forming a first anodic bond at an interface of the microfabricated die and the glass layer, and forming a second anodic bond at an interface of the metal plate and the glass layer, where the second anodic bond is formed using a voltage that is lower than the voltage used to form the first anodic bond. The second anodic bond is formed with the polarity of the voltage reversed with respect to the glass layer and the formation of the first anodic bond. The metal plate includes attachment features that allow removal of the microfluidic device from a fixture.
    Type: Application
    Filed: May 3, 2021
    Publication date: August 19, 2021
    Inventors: Stephen Forrest, Gregory McGraw, Siddharth Harikrishna Mohan, Diane L. Peters
  • Patent number: 11088324
    Abstract: Methods and devices for controlling pressures in microenvironments between a deposition apparatus and a substrate are provided. Each microenvironment is associated with an aperture of the deposition apparatus which can allow for control of the microenvironment.
    Type: Grant
    Filed: January 22, 2020
    Date of Patent: August 10, 2021
    Assignee: Universal Display Corporation
    Inventors: William E. Quinn, Siddharth Harikrishna Mohan, Gregory McGraw, Xin Xu
  • Patent number: 11021785
    Abstract: A microfluidic device for use with a microfluidic delivery system, such as an organic vapor jet printing device, includes a glass layer that is directly bonded to a microfabricated die and a metal plate via a double anodic bond. The double anodic bond is formed by forming a first anodic bond at an interface of the microfabricated die and the glass layer, and forming a second anodic bond at an interface of the metal plate and the glass layer, where the second anodic bond is formed using a voltage that is lower than the voltage used to form the first anodic bond. The second anodic bond is formed with the polarity of the voltage reversed with respect to the glass layer and the formation of the first anodic bond. The metal plate includes attachment features that allow removal of the microfluidic device from a fixture.
    Type: Grant
    Filed: December 13, 2017
    Date of Patent: June 1, 2021
    Assignees: THE REGENTS OF THE UNIVERSITY OF MICHIGAN, UNIVERSAL DISPLAY CORPORATION
    Inventors: Stephen Forrest, Gregory McGraw, Siddharth Harikrishna Mohan, Diane L. Peters
  • Publication number: 20210119175
    Abstract: A novel thin film encapsulated OLED panel architecture and a method for making the panels with improved shelf life is disclosed. The OLED panel consists of a plurality of OLED pixels; each OLED pixel is individually hermetically sealed and isolated from its neighboring pixels. The organic stack of the OLED pixel is contained within its own hermetically sealed structure, achieved by making the structure on a barrier coated substrate and using a first barrier material as the grid and a second barrier for encapsulating the entire OLED pixel. The first barrier material provides the edge seal while the second barrier disposed over the pixel provides protection from top down moisture diffusion. By isolating and hermetically sealing individual pixels; any damage such as moisture and oxygen ingress due to defects or particles, delamination, cracking etc. can be effectively contained within the pixel thereby protecting other pixels in the panel.
    Type: Application
    Filed: December 29, 2020
    Publication date: April 22, 2021
    Inventors: Siddharth HARIKRISHNA MOHAN, William E. QUINN, Ruiqing MA, Emory KRALL, Luke WALSKI
  • Publication number: 20210054495
    Abstract: Embodiments of the disclosed subject matter provide methods and systems including a nozzle, a source of material to be deposited on a substrate in fluid communication with the nozzle, a delivery gas source in fluid communication with the source of material to be deposited with the nozzle, an exhaust channel disposed adjacent to the nozzle, a confinement gas source in fluid communication with the nozzle and the exhaust channel, and disposed adjacent to the exhaust channel, and an actuator to adjust a fly height separation between a deposition nozzle aperture of the nozzle and a deposition target. The adjustment of the fly height separation may stop and/or start the deposition of the material from the nozzle.
    Type: Application
    Filed: October 28, 2020
    Publication date: February 25, 2021
    Inventors: Gregory McGRAW, William E. QUINN, Matthew KING, Elliot H. HARTFORD, JR., Siddharth HARIKRISHNA MOHAN, Benjamin SWEDLOVE, Gregg KOTTAS
  • Patent number: 10910590
    Abstract: A novel thin film encapsulated OLED panel architecture and a method for making the panels with improved shelf life is disclosed. The OLED panel consists of a plurality of OLED pixels; each OLED pixel is individually hermetically sealed and isolated from its neighboring pixels. The organic stack of the OLED pixel is contained within its own hermetically sealed structure, achieved by making the structure on a barrier coated substrate and using a first barrier material as the grid and a second barrier for encapsulating the entire OLED pixel. The first barrier material provides the edge seal while the second barrier disposed over the pixel provides protection from top down moisture diffusion. By isolating and hermetically sealing individual pixels; any damage such as moisture and oxygen ingress due to defects or particles, delamination, cracking etc. can be effectively contained within the pixel thereby protecting other pixels in the panel.
    Type: Grant
    Filed: March 18, 2015
    Date of Patent: February 2, 2021
    Assignee: Universal Display Corporation
    Inventors: Siddharth Harikrishna Mohan, William E. Quinn, Ruiqing Ma, Emory Krall, Luke Walski
  • Patent number: 10858729
    Abstract: Embodiments of the disclosed subject matter provide methods and systems including a nozzle, a source of material to be deposited on a substrate in fluid communication with the nozzle, a delivery gas source in fluid communication with the source of material to be deposited with the nozzle, an exhaust channel disposed adjacent to the nozzle, a confinement gas source in fluid communication with the nozzle and the exhaust channel, and disposed adjacent to the exhaust channel, and an actuator to adjust a fly height separation between a deposition nozzle aperture of the nozzle and a deposition target. The adjustment of the fly height separation may stop and/or start the deposition of the material from the nozzle.
    Type: Grant
    Filed: June 4, 2015
    Date of Patent: December 8, 2020
    Assignee: Universal Display Corporation
    Inventors: Gregory McGraw, William E. Quinn, Matthew King, Elliot H. Hartford, Jr., Siddharth Harikrishna Mohan, Benjamin Swedlove, Gregg Kottas
  • Publication number: 20200291521
    Abstract: Systems and techniques for depositing organic material on a substrate are provided, in which one or more shield gas flows prevents contamination of the substrate by the chamber ambient. Thus, multiple layers of the same or different materials may be deposited in a single deposition chamber, without the need for movement between different deposition chambers, and with reduced chance of cross-contamination between layers.
    Type: Application
    Filed: June 3, 2020
    Publication date: September 17, 2020
    Inventors: Gregory MCGRAW, William E. QUINN, Gregg KOTTAS, Siddharth HARIKRISHNA MOHAN, Matthew KING
  • Patent number: 10704144
    Abstract: Systems and techniques for depositing organic material on a substrate are provided, in which one or more shield gas flows prevents contamination of the substrate by the chamber ambient. Thus, multiple layers of the same or different materials may be deposited in a single deposition chamber, without the need for movement between different deposition chambers, and with reduced chance of cross-contamination between layers.
    Type: Grant
    Filed: October 11, 2016
    Date of Patent: July 7, 2020
    Assignee: Universal Display Corporation
    Inventors: Gregory McGraw, William E. Quinn, Gregg Kottas, Siddharth Harikrishna Mohan, Matthew King
  • Publication number: 20200181437
    Abstract: A print material includes a vinylic molecule, a vinylic cross-linker molecule having a plurality of vinyl groups, a quantum dot, a light-scattering particle having a surface composition, and a dispersant having a chemical affinity matched to the surface composition. Methods of making and using such print materials are also described.
    Type: Application
    Filed: December 4, 2019
    Publication date: June 11, 2020
    Applicant: Kateeva, Inc.
    Inventors: Elena Rogojina, Inna Gurevitch, Teresa A. Ramos, Siddharth Harikrishna-Mohan, Robert Richard Roth, Noa Cohen, Elena Sheina
  • Publication number: 20200161550
    Abstract: Methods and devices for controlling pressures in microenvironments between a deposition apparatus and a substrate are provided. Each microenvironment is associated with an aperture of the deposition apparatus which can allow for control of the microenvironment.
    Type: Application
    Filed: January 22, 2020
    Publication date: May 21, 2020
    Inventors: William E. Quinn, Siddharth Harikrishna Mohan, Gregory McGraw, Xin Xu
  • Publication number: 20200119279
    Abstract: Systems and arrangements of OVJP deposition devices are provided, in which one or more organic material crucibles are directly attached to an injection block and a print head without the need for external delivery components such as feedtubes. Each crucible may be hermetically sealed until it is attached to the injection block, allowing for a single device to provide for storage, transport, and deposition of the organic material.
    Type: Application
    Filed: November 20, 2019
    Publication date: April 16, 2020
    Inventors: Matthew KING, William E. QUINN, Gregory MCGRAW, Siddharth HARIKRISHNA MOHAN, Elliot H. HARTFORD, Benjamin SWEDLOVE, Gregg KOTTAS, Tomasz TROJACKI, Julia J. BROWN
  • Publication number: 20200109303
    Abstract: Embodiments described herein provide a print material, comprising a curable precursor mixture; and a plurality of light-scattering particles, wherein a droplet of the print material having diameter of about 30 ?m has a maximum transmission haze at a wavelength less than about 500 nm and a transmission haze at an infrared wavelength up to about 1,600 nm that is less than 60% of the maximum transmission haze. In some cases, a polymer film having thickness of about 20 ?m made from a print material has a maximum transmission haze at a wavelength less than about 500 nm and a transmission haze at an infrared wavelength up to about 1,600 nm that is less than 60% of the maximum transmission haze. A process is also described, including applying the material above to a substrate as a print material and solidifying the print material to form a structure on the substrate.
    Type: Application
    Filed: August 20, 2019
    Publication date: April 9, 2020
    Applicant: Kateeva, Inc.
    Inventors: Teresa A. Ramos, Siddharth Harikrishna-Mohan, Michael Morse, Conor F. Madigan, Christopher D. Favaro
  • Publication number: 20200103709
    Abstract: Liquid ink compositions containing quantum dots for optoelectronic display applications are provided. Also provided are solid films formed by drying the ink compositions, optical elements incorporating the solid films, display devices incorporating the optical elements, and methods of forming the solid films, optical elements, and the devices. Liquid ink compositions and solid films made by drying the liquid ink compositions include one or more blue light-absorbing materials in combination with red light-emitting QDs or green light-emitting QDs.
    Type: Application
    Filed: September 3, 2019
    Publication date: April 2, 2020
    Applicant: Kateeva, Inc.
    Inventors: Conor F. Madigan, Siddharth Harikrishna-Mohan, Florian Pschenitzka, Teresa A. Ramos, Inna Gurevitch
  • Patent number: 10580984
    Abstract: Methods and devices for controlling pressures in microenvironments between a deposition apparatus and a substrate are provided. Each microenvironment is associated with an aperture of the deposition apparatus which can allow for control of the microenvironment.
    Type: Grant
    Filed: November 28, 2018
    Date of Patent: March 3, 2020
    Assignee: Universal Display Corporation
    Inventors: William E. Quinn, Siddharth Harikrishna Mohan, Gregory McGraw, Xin Xu
  • Patent number: 10566534
    Abstract: Systems and arrangements of OVJP deposition devices are provided, in which one or more organic material crucibles are directly attached to an injection block and a print head without the need for external delivery components such as feedtubes. Each crucible may be hermetically sealed until it is attached to the injection block, allowing for a single device to provide for storage, transport, and deposition of the organic material.
    Type: Grant
    Filed: October 12, 2016
    Date of Patent: February 18, 2020
    Assignee: Universal Display Corporation
    Inventors: Matthew King, William E. Quinn, Gregory McGraw, Siddharth Harikrishna Mohan, Elliot H. Hartford, Jr., Benjamin Swedlove, Gregg Kottas, Tomasz Trojacki, Julia J. Brown
  • Publication number: 20190221771
    Abstract: A buffer layer is provided that can be fabricated over an OLED without the use of any oxygen-containing gas. The buffer layer reduces the possibility of damage to the underlying OLED due to use of oxygen-containing materials during deposition of subsequent barrier layers, and thereby allows for deposition of barrier layers without reducing the flexibility of the device.
    Type: Application
    Filed: March 22, 2019
    Publication date: July 18, 2019
    Inventors: Siddharth Harikrishna Mohan, William E. Quinn, James Robert Kantor
  • Publication number: 20190115535
    Abstract: Methods and devices for controlling pressures in microenvironments between a deposition apparatus and a substrate are provided. Each microenvironment is associated with an aperture of the deposition apparatus which can allow for control of the microenvironment.
    Type: Application
    Filed: November 28, 2018
    Publication date: April 18, 2019
    Inventors: William E. Quinn, Siddharth Harikrishna Mohan, Gregory McGraw, Xin Xu
  • Patent number: 10170701
    Abstract: Methods and devices for controlling pressures in microenvironments between a deposition apparatus and a substrate are provided. Each microenvironment is associated with an aperture of the deposition apparatus which can allow for control of the microenvironment.
    Type: Grant
    Filed: March 4, 2017
    Date of Patent: January 1, 2019
    Assignee: Universal Display Corporation
    Inventors: William E. Quinn, Siddharth Harikrishna Mohan, Gregory McGraw, Xin Xu