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).

  • Publication number: 20180331327
    Abstract: Embodiments of the disclosed subject matter provide a nozzle assembly and method of making the same, the nozzle assembly including a first aperture formed on a first aperture plate to eject a carrier gas flow having organic vapor onto a substrate in a deposition chamber, second apertures formed on a second aperture plate disposed adjacent to the first aperture to form a vacuum aperture, where the first aperture plate and the second aperture plate are separated by a first separator plate, third apertures formed on a third aperture plate to eject purge gas that are disposed adjacent to the second aperture plate, where the second aperture plate and the third aperture plate are separated by second separator plate, and a third separator plate is disposed adjacent to the one or more third aperture plates to form a gas channel in the one or more third aperture plates.
    Type: Application
    Filed: February 24, 2017
    Publication date: November 15, 2018
    Inventors: William E. QUINN, Gregory McGRAW, Siddharth HARIKRISHNA MOHAN, Matthew KING, Elliot H. HARTFORD, Jr.
  • Patent number: 10128468
    Abstract: Embodiments of the disclosed subject matter provide a nozzle assembly and method of making the same, the nozzle assembly including a first aperture formed on a first aperture plate to eject a carrier gas flow having organic vapor onto a substrate in a deposition chamber, second apertures formed on a second aperture plate disposed adjacent to the first aperture to form a vacuum aperture, where the first aperture plate and the second aperture plate are separated by a first separator plate, third apertures formed on a third aperture plate to eject purge gas that are disposed adjacent to the second aperture plate, where the second aperture plate and the third aperture plate are separated by second separator plate, and a third separator plate is disposed adjacent to the one or more third aperture plates to form a gas channel in the one or more third aperture plates.
    Type: Grant
    Filed: February 24, 2017
    Date of Patent: November 13, 2018
    Assignee: Universal Display Corporation
    Inventors: William E. Quinn, Gregory McGraw, Siddharth Harikrishna Mohan, Matthew King, Elliot H. Hartford, Jr.
  • Patent number: 9991463
    Abstract: Embodiments of the present invention provide electronic devices such as OLEDs that have enhanced mechanical integrity and prolonged shelf, by minimizing the spread of a delamination region using topographical non-uniformities introduced in the device structure. For example, a device may be made deliberately non-planar by introducing multiple energy barriers which can prevent or minimize the propagation of a delamination, because the delamination will have to cross the energy barriers in order to spread to a larger area.
    Type: Grant
    Filed: June 13, 2013
    Date of Patent: June 5, 2018
    Assignee: Universal Display Corporation
    Inventors: Prashant Mandlik, Ruiqing Ma, Siddharth Harikrishna Mohan
  • Publication number: 20180105923
    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: December 13, 2017
    Publication date: April 19, 2018
    Inventors: Stephen Forrest, Gregory McGraw, Siddharth Harikrishna Mohan, Diane L. Peters
  • Publication number: 20180108865
    Abstract: A hybrid permeation barrier having two complementary layers is disclosed. The barrier includes a first layer with a relatively high stress-thickness in the range of ?1000 MPa-?m to ?200 MPa-?m and a second layer with a relatively low stress-thickness in the range ?150 MPa-?m to 300 MPa-?m. The second layer compensates for the stress caused by the first, thereby allowing for a barrier that provides good permeation without causing failure of the device due to delamination.
    Type: Application
    Filed: October 18, 2017
    Publication date: April 19, 2018
    Inventors: Siddharth HARIKRISHNA MOHAN, William E. QUINN, Arpit PATEL, James Robert KANTOR
  • Publication number: 20180029050
    Abstract: Nozzle designs which have been found to be effective in governing overspray in OVJP are provided. Aspects of the invention have been found to be effective in reducing or avoiding sudden pressure drops at the end of the nozzle close to the substrate, and may be advantageously employed in obtaining, for example, greater consistency between the nozzle outlet diameter and the deposited pattern width.
    Type: Application
    Filed: October 3, 2017
    Publication date: February 1, 2018
    Inventors: Siddharth Harikrishna Mohan, Paul E. Burrows
  • Patent number: 9876192
    Abstract: A barrier film on an organic electronic device. The barrier film comprises an inorganic polymeric silicon composition having Si—O—Si bonds which exhibit an asymmetric stretching Si-0 vibration frequency (AS1) ranging between 1200 cm?1 and 1000 cm?1, Si—O—H vibration frequency ranging between 950 cm?1 and 810 cm?1 and an —O—H ranging between 3400 cm?1 and 3700 cm?1 in which the ratio of peak areas for Si—O—H and —O—H vibration frequencies compared to the peak area of the Si—O—Si vibration frequency is less than 0.15. The barrier film exhibits a water vapor transmission rate between 1×10?2 g/m?2 day and 1×10?8 g/m?2 day.
    Type: Grant
    Filed: May 12, 2015
    Date of Patent: January 23, 2018
    Assignee: Universal Display Corporation
    Inventors: Siddharth Harikrishna Mohan, William E. Quinn
  • Patent number: 9873939
    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: September 19, 2011
    Date of Patent: January 23, 2018
    Assignees: The Regents of the University of Michigan, Universal Display Corporation
    Inventors: Stephen Forrest, Gregory McGraw, Siddharth Harikrishna Mohan, Diane Peters
  • Patent number: 9871229
    Abstract: An emissive layer deposited in graded manner using a plurality of nozzles is disclosed. A mixtures ejected from the plurality of nozzles may contain varying concentrations of host-to-dopant material. The nozzles, as disclosed, may be arranged in a sequential manner such that the order of the sequence is based on varying concentration of the host-to-dopant material. The nozzles may be configured to translate relative to an area of a substrate to allow sequential deposition.
    Type: Grant
    Filed: December 17, 2015
    Date of Patent: January 16, 2018
    Assignee: Universal Display Corporation
    Inventors: Siddharth Harikrishna Mohan, Paul E. Burrows
  • Patent number: 9818967
    Abstract: Optical components and devices are provided that include a substrate, a microlens array, and a barrier film system conformally covering the microlens array. An OLED may be optically coupled to the microlens array. The barrier film may provide protection to the microlens array or other components, without having a significant negative impact on outcoupling of light from the coupled OLED by the microlens array.
    Type: Grant
    Filed: June 28, 2013
    Date of Patent: November 14, 2017
    Assignee: Universal Display Corporation
    Inventors: Ruiqing Ma, Julia J. Brown, Michael Hack, Siddharth Harikrishna Mohan, Gregory McGraw
  • Publication number: 20170256714
    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: March 4, 2017
    Publication date: September 7, 2017
    Inventors: William E. Quinn, Siddharth Harikrishna Mohan, Gregory McGraw, Xin Xu
  • Publication number: 20170162835
    Abstract: Embodiments of the disclosed subject matter provide a nozzle assembly and method of making the same, the nozzle assembly including a first aperture formed on a first aperture plate to eject a carrier gas flow having organic vapor onto a substrate in a deposition chamber, second apertures formed on a second aperture plate disposed adjacent to the first aperture to form a vacuum aperture, where the first aperture plate and the second aperture plate are separated by a first separator plate, third apertures formed on a third aperture plate to eject purge gas that are disposed adjacent to the second aperture plate, where the second aperture plate and the third aperture plate are separated by second separator plate, and a third separator plate is disposed adjacent to the one or more third aperture plates to form a gas channel in the one or more third aperture plates.
    Type: Application
    Filed: February 24, 2017
    Publication date: June 8, 2017
    Inventors: William E. QUINN, Gregory McGRAW, Siddharth HARIKRISHNA MOHAN, Matthew KING, Elliot H. HARTFORD, Jr.
  • Patent number: 9647221
    Abstract: Organic electronic devices comprising a covalently bonded organic/inorganic composite layer. The composite layer may be formed by the reaction of a metal alkoxide with a charge transport compound having one or more hydroxyl groups. Examples of metal alkoxides that can be used include vanadium alkoxides, molybdenum alkoxides, titanium alkoxides, or silicon alkoxides. This composite layer can be used for any of the various charge conducting layers in an organic electronic device, including the hole injection layer.
    Type: Grant
    Filed: April 24, 2015
    Date of Patent: May 9, 2017
    Assignee: UNIVERSAL DISPLAY CORPORATION
    Inventors: Raymond Kwong, Chuanjun Xia, Siddharth Harikrishna Mohan, Kwang-Ohk Cheon, Jason Brooks
  • Publication number: 20170117503
    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: October 21, 2016
    Publication date: April 27, 2017
    Inventors: Siddharth Harikrishna Mohan, William E. Quinn, James Robert Kantor
  • Publication number: 20170104159
    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: October 12, 2016
    Publication date: April 13, 2017
    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: 20170101711
    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: October 11, 2016
    Publication date: April 13, 2017
    Inventors: Gregory MCGRAW, William E. QUINN, Gregg KOTTAS, Siddharth HARIKRISHNA MOHAN, Matthew KING
  • Publication number: 20170077451
    Abstract: A barrier film on an organic electronic device. The barrier film comprises an inorganic polymeric silicon composition having Si—O—Si bonds which exhibit an asymmetric stretching Si—0 vibration frequency (AS1) ranging between 1200 cm?1 and 1000 cm?1, Si—O—H vibration frequency ranging between 950 cm?1 and 810 cm?1 and an —O—H ranging between 3400 cm?1 and 3700 cm?1 in which the ratio of peak areas for Si—O—H and —O—H vibration frequencies compared to the peak area of the Si—O—Si vibration frequency is less than 0.15. The barrier film exhibits a water vapor transmission rate between 1×10?2 g/m?2 day and 1×10?8 g/m?2 day.
    Type: Application
    Filed: May 12, 2015
    Publication date: March 16, 2017
    Applicant: Universal Display Corporation
    Inventors: Siddharth Harikrishna Mohan, William E. Quinn
  • Patent number: 9583707
    Abstract: Embodiments of the disclosed subject matter provide a nozzle assembly and method of making the same, the nozzle assembly including a first aperture formed on a first aperture plate to eject a carrier gas flow having organic vapor onto a substrate in a deposition chamber, second apertures formed on a second aperture plate disposed adjacent to the first aperture to form a vacuum aperture, where the first aperture plate and the second aperture plate are separated by a first separator plate, third apertures formed on a third aperture plate to eject purge gas that are disposed adjacent to the second aperture plate, where the second aperture plate and the third aperture plate are separated by second separator plate, and a third separator plate is disposed adjacent to the one or more third aperture plates to form a gas channel in the one or more third aperture plates.
    Type: Grant
    Filed: September 18, 2015
    Date of Patent: February 28, 2017
    Assignee: Universal Display Corporation
    Inventors: William E. Quinn, Gregory McGraw, Siddharth Harikrishna Mohan, Matthew King, Elliot H. Hartford, Jr.
  • Publication number: 20170016117
    Abstract: Plasma deposition systems and techniques are provided that use plasma generating units having one horizontal dimension at least three times as long as the other horizontal dimension. Plasma sources as disclosed herein thus have non-uniformly scaled dimensions in the x and y directions, to facilitate uniform deposition. Sources as disclosed herein may reduce heating of the substrate due to substrate cooling between plasma sources. They also may provide improved particle coverage when the film deposited is a barrier film due to plasma and gas flow divergence at the edges of the plasma source.
    Type: Application
    Filed: June 21, 2014
    Publication date: January 19, 2017
    Applicant: UNIVERSAL DISPLAY CORPORATION
    Inventors: William E. QUINN, Ruiqing MA, Siddharth HARIKRISHNA MOHAN
  • Patent number: 9530962
    Abstract: Methods of fabricating a device having laterally patterned first and second sub-devices, such as subpixels of an OLED, are provided. Exemplary methods may include depositing via organic vapor jet printing (OVJP) a first organic layer of the first sub-device and a first organic layer of the second sub-device. The first organic layer of the first sub-device and the first organic layer of the second sub-device are both the same type of layer, but have different thicknesses. The type of layer is selected from an ETL, an HTL, an HIL, a spacer and a capping layer.
    Type: Grant
    Filed: February 19, 2016
    Date of Patent: December 27, 2016
    Assignee: Universal Display Corporation
    Inventors: Siddharth Harikrishna Mohan, Paul E. Burrows, Julia J. Brown