Patents by Inventor Stephen Forrest

Stephen Forrest 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: 11895853
    Abstract: Organic photovoltaic cells (OPVs) and their compositions are described herein. In one or more embodiments, the OPV or solar cell includes a first electrode (e.g., cathode); a second electrode (e.g., anode); an active layer positioned between the first electrode and the second electrode; and a channel layer positioned between the first electrode and the active layer, wherein the channel layer is configured to laterally disperse a charge across the channel layer. In certain examples, the first electrode is arranged in a grid structure having a plurality of electrode segments and a respective opening between adjacent segments of the first electrode.
    Type: Grant
    Filed: December 20, 2019
    Date of Patent: February 6, 2024
    Assignee: The Regents of the University of Michigan
    Inventors: Stephen Forrest, Quinn Burlingame, Caleb Coburn
  • Patent number: 11761076
    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: May 3, 2021
    Date of Patent: September 19, 2023
    Assignee: The Regents of the University of Michigan
    Inventors: Stephen Forrest, Gregory McGraw, Siddharth Harikrishna Mohan, Diane L. Peters
  • Publication number: 20230079078
    Abstract: In accordance with various aspects of the invention, a recall transaction is issued if a tag filter entry needs to be freed up for an incoming transaction. Directory entries chosen for a recall transaction are pushed into a fully associative structure called victim buffer. If this structure gets full, then an entry is selected from entries inside the victim buffer for the recall.
    Type: Application
    Filed: November 21, 2022
    Publication date: March 16, 2023
    Applicant: ARTERIS, INC.
    Inventors: David A. KRUCKEMYER, Craig Stephen FORREST
  • Patent number: 11507510
    Abstract: In accordance with various aspects of the invention, a recall transaction is issued if a tag filter entry needs to be freed up for an incoming transaction. Directory entries chosen for a recall transaction are pushed into a fully associative structure called victim buffer. If this structure gets full, then an entry is selected from entries inside the victim buffer for the recall.
    Type: Grant
    Filed: December 28, 2018
    Date of Patent: November 22, 2022
    Assignee: Arteris, Inc.
    Inventors: Craig Stephen Forrest, David A. Kruckemyer
  • Patent number: 11374172
    Abstract: Methods and systems for organic vapor jet deposition are provided, where an exhaust is disposed between adjacent nozzles. The exhaust may reduce pressure buildup in the nozzles and between the nozzles and the substrate, leading to improved deposition profiles, resolution, and improved nozzle-to-nozzle uniformity. The exhaust may be in fluid communication with an ambient vacuum, or may be directly connected to a vacuum source.
    Type: Grant
    Filed: December 21, 2010
    Date of Patent: June 28, 2022
    Assignees: The Regents of the University of Michigan, The Trustees of Princeton University
    Inventors: Stephen Forrest, Richard Lunt
  • Patent number: 11292245
    Abstract: A device includes a nozzle including a discharge end for discharging a fluid, a shutter plate including an aperture, the shutter plate positioned at the discharge end of the nozzle, a plurality of tethers coupled to the shutter plate, and a plurality of electrostatic actuators. Each of the plurality of electrostatic actuators are coupled to one or more of the plurality of tethers. The plurality of electrostatic actuators are configured to move the shutter plate between an open position and a closed position relative the discharge end of the nozzle. In the open position, the aperture is in fluid communication with the discharge end of the nozzle to permit fluid from the discharge end of the nozzle to flow through the aperture. In the closed position, at least a portion of the shutter plate inhibits fluid from the discharge end of the nozzle from flowing through the aperture.
    Type: Grant
    Filed: June 3, 2020
    Date of Patent: April 5, 2022
    Assignees: Trustees of Boston University, The Regents of the University of Michigan
    Inventors: David J. Bishop, Lawrence Barrett, Stephen Forrest
  • Patent number: 11237965
    Abstract: A cache coherent system includes a directory with more than one snoop filter, each of which stores information in a different set of snoop filter entries. Each snoop filter is associated with a subset of all caching agents within the system. Each snoop filter uses an algorithm chosen for best performance on the caching agents associated with the snoop filter. The number of snoop filter entries in each snoop filter is primarily chosen based on the caching capacity of just the caching agents associated with the snoop filter. The type of information stored in each snoop filter entry of each snoop filter is chosen to meet the desired filtering function of the specific snoop filter.
    Type: Grant
    Filed: December 31, 2014
    Date of Patent: February 1, 2022
    Assignee: ARTERIS, INC.
    Inventors: Craig Stephen Forrest, David A. Kruckemyer
  • 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: 11080191
    Abstract: A cache coherent system includes a directory with more than one snoop filter, each of which stores information in a different set of snoop filter entries. Each snoop filter is associated with a subset of all caching agents within the system. Each snoop filter uses an algorithm chosen for best performance on the caching agents associated with the snoop filter. The number of snoop filter entries in each snoop filter is primarily chosen based on the caching capacity of just the caching agents associated with the snoop filter. The type of information stored in each snoop filter entry of each snoop filter is chosen to meet the desired filtering function of the specific snoop filter.
    Type: Grant
    Filed: March 18, 2020
    Date of Patent: August 3, 2021
    Assignee: ARTERIS, INC.
    Inventors: Craig Stephen Forrest, David A. Kruckemyer
  • Publication number: 20210206162
    Abstract: A device includes a nozzle including a discharge end for discharging a fluid, a shutter plate including an aperture, the shutter plate positioned at the discharge end of the nozzle, a plurality of tethers coupled to the shutter plate, and a plurality of electrostatic actuators. Each of the plurality of electrostatic actuators are coupled to one or more of the plurality of tethers. The plurality of electrostatic actuators are configured to move the shutter plate between an open position and a closed position relative the discharge end of the nozzle. In the open position, the aperture is in fluid communication with the discharge end of the nozzle to permit fluid from the discharge end of the nozzle to flow through the aperture. In the closed position, at least a portion of the shutter plate inhibits fluid from the discharge end of the nozzle from flowing through the aperture.
    Type: Application
    Filed: June 3, 2020
    Publication date: July 8, 2021
    Inventors: David J. Bishop, Lawrence Barrett, Stephen Forrest
  • 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
  • Patent number: 11015259
    Abstract: A method for producing a laminated shim includes subjecting a shim stock to a plasma electrolytic oxidization (PEO) process to create a PEO shim, applying an adhesive layer of an adhesive to a surface of the PEO shim, stacking at least one other PEO shim onto the adhesive layer of the PEO shim to create a stack of PEO shims, and pressing the stack of PEO shims together to create a PEO coated peelable laminate.
    Type: Grant
    Filed: February 15, 2017
    Date of Patent: May 25, 2021
    Assignee: Voss Innovative Technologies Corporation
    Inventors: Peter Voss, Stephen Forrest, Kapilan Paramanathan, Deoram Singh
  • Patent number: 10971542
    Abstract: Systems and methods including bonding two or more separately formed circuit layers are provided using, for example, cold welding techniques. Processing techniques may be provided for combining inorganic and/or organic semiconductor devices in apparatus including, for example, microchips, optoelectronic devices, such as solar cells, photodetectors and organic light emitting diodes (OLEDs), and other apparatus with multi-layer circuitry. Methods of bonding preformed circuit layers may include the use of stamping and pressure bonding contacts of two or more circuit layers together. Such methods may find applicability, for example, in bonding circuitry to shaped substrates, including various rounded and irregular shapes, and may be used to combine devices with different structural properties, e.g. from different materials systems.
    Type: Grant
    Filed: September 9, 2019
    Date of Patent: April 6, 2021
    Assignee: The Regents of the University of Michigan
    Inventors: Stephen Forrest, Xin Xu, Christopher Kyle Renshaw
  • Publication number: 20200235325
    Abstract: Organic photovoltaic cells (OPVs) and their compositions are described herein. In one or more embodiments, the OPV or solar cell includes a first electrode (e.g., cathode); a second electrode (e.g., anode); an active layer positioned between the first electrode and the second electrode; and a channel layer positioned between the first electrode and the active layer, wherein the channel layer is configured to laterally disperse a charge across the channel layer. In certain examples, the first electrode is arranged in a grid structure having a plurality of electrode segments and a respective opening between adjacent segments of the first electrode.
    Type: Application
    Filed: December 20, 2019
    Publication date: July 23, 2020
    Inventors: Stephen Forrest, Quinn Burlingame, Caleb Coburn
  • Patent number: 10712174
    Abstract: A system includes a plurality of sensors measuring a physical parameter; a processing unit communicatively coupled to the plurality of sensors and configured to receive sensor data from each of the plurality of sensors; wherein the processing unit is further configured to compare rates of change between sensor data for each individual sensor of the plurality of sensors and each of the other individual sensors of the plurality of sensors; wherein the processing unit is further configured to perform a first action when the rate of change of each of the plurality of sensors is within a first threshold of all of the other plurality of sensors; and wherein the processing unit is further configured to perform a second action when the rate of change of at least one of the plurality of sensors is not within the first threshold of at least another of the plurality of sensors.
    Type: Grant
    Filed: October 10, 2012
    Date of Patent: July 14, 2020
    Assignee: Honeywell International Inc.
    Inventors: Stephen Forrest Rogoff, LeRoy Ernest Vetsch
  • Publication number: 20200218657
    Abstract: A cache coherent system includes a directory with more than one snoop filter, each of which stores information in a different set of snoop filter entries. Each snoop filter is associated with a subset of all caching agents within the system. Each snoop filter uses an algorithm chosen for best performance on the caching agents associated with the snoop filter. The number of snoop filter entries in each snoop filter is primarily chosen based on the caching capacity of just the caching agents associated with the snoop filter. The type of information stored in each snoop filter entry of each snoop filter is chosen to meet the desired filtering function of the specific snoop filter.
    Type: Application
    Filed: March 18, 2020
    Publication date: July 9, 2020
    Applicant: ARTERIS, INC.
    Inventors: Craig Stephen FORREST, David A. KRUCKEMYER
  • Publication number: 20200168658
    Abstract: Systems and methods including bonding two or more separately formed circuit layers are provided using, for example, cold welding techniques. Processing techniques may be provided for combining inorganic and/or organic semiconductor devices in apparatus including, for example, microchips, optoelectronic devices, such as solar cells, photodetectors and organic light emitting diodes (OLEDs), and other apparatus with multi-layer circuitry. Methods of bonding preformed circuit layers may include the use of stamping and pressure bonding contacts of two or more circuit layers together. Such methods may find applicability, for example, in bonding circuitry to shaped substrates, including various rounded and irregular shapes, and may be used to combine devices with different structural properties, e.g. from different materials systems.
    Type: Application
    Filed: September 9, 2019
    Publication date: May 28, 2020
    Inventors: Stephen Forrest, Xin Xu, Christopher Kyle Renshaw
  • Patent number: 10283737
    Abstract: A method for forming an electronic device such as a passive color OLED display. Bottom electrodes are patterned onto a substrate in rows. Raised posts formed by photoresist are patterned into columns oriented orthogonally to the bottom row electrodes. One or more organic layers, such as R, G, B organic emissive layers are patterned over the raised posts and bottom electrodes using organic vapor jet printing (OVJP). An upper electrode layer is applied over the entire device and forms electrically isolated columnar electrodes due to discontinuities in the upper electrode layer created by the raised columnar posts. This permits patterning of the upper electrodes over the organic layers without using photolithography. A device formed by this method is also described.
    Type: Grant
    Filed: October 28, 2013
    Date of Patent: May 7, 2019
    Assignee: The Regents of the University of Michigan
    Inventors: Stephen Forrest, Gregory McGraw
  • Publication number: 20190129852
    Abstract: In accordance with various aspects of the invention, a recall transaction is issued if a tag filter entry needs to be freed up for an incoming transaction. Directory entries chosen for a recall transaction are pushed into a fully associative structure called victim buffer. If this structure gets full, then an entry is selected from entries inside the victim buffer for the recall.
    Type: Application
    Filed: December 28, 2018
    Publication date: May 2, 2019
    Applicant: Arteris, Inc.
    Inventors: Craig Stephen FORREST, David A. KRUCKEMYER
  • Patent number: 10255183
    Abstract: In accordance with various aspects of the invention, a recall transaction is issued if a tag filter entry needs to be freed up for an incoming transaction. Directory entries chosen for a recall transaction are pushed into a fully associative structure called victim buffer. If this structure gets full, then an entry is selected from entries inside the victim buffer for the recall.
    Type: Grant
    Filed: May 23, 2017
    Date of Patent: April 9, 2019
    Assignee: ARTERIS, Inc.
    Inventors: Craig Stephen Forrest, David A. Kruckemyer