Patents by Inventor Tae H. Cho

Tae H. Cho 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: 20230097272
    Abstract: A spatial atomic layer deposition apparatus that includes a depositor head having an active surface configured to discharge a flow of a first precursor gas, a flow of a second precursor gas, and a flow of an inert gas that separates the flow of the first precursor gas and the flow of the second precursor gas, a substrate plate that opposes the depositor head and has a support surface for retaining a build substrate, a plurality of gap detection sensors producing an output signal indicative of a distance between the active surface of the depositor head and the support surface of the substrate plate, and a controller that communicates with the plurality of gap detection sensors. The gap detection sensors permit a spatial orientation of the active surface of the depositor head and the support surface of the substrate plate to be determined in real-time and monitored.
    Type: Application
    Filed: January 23, 2021
    Publication date: March 30, 2023
    Inventors: TAE H. CHO, ELLIS HERMAN, ORLANDO TREJO, MATTISON ROSE, LAUREN RANSOHOFF, NEIL DASGUPTA, KIRA BARTON, HYUNWOO PARK, ANDRE BROOKS
  • Patent number: 11342176
    Abstract: An integrated electrohydrodynamic jet printing and spatial atomic layer deposition system for conducting nanofabrication includes an electrohydrodynamic jet printing station that includes an E-jet printing nozzle, a spatial atomic layer deposition station that includes a zoned ALD precursor gas distributor that discharges linear zone-separated first and second ALD precursor gases, a heatable substrate plate supported on a motion actuator controllable to move the substrate plate in three dimensions, and a conveyor on which the motion actuator is supported. The conveyor is operative to move the motion actuator between the electrohydrodynamic jet printing station and the spatial atomic layer deposition station so that the substrate plate is conveyable between a printing window of the E-jet printing nozzle and a deposition window of the zoned ALD precursor gas distributor, respectively. A method of conducting area-selective atomic layer deposition is also disclosed.
    Type: Grant
    Filed: July 23, 2020
    Date of Patent: May 24, 2022
    Assignee: The Regents of the University of Michigan
    Inventors: Mattison Rose, Kira Barton, Neil Dasgupta, Lauren Ransohoff, Ellis Herman, Orlando Trejo, Carli Huber, Tae H. Cho, Eric Kazyak, Christopher P. Pannier
  • Publication number: 20210028006
    Abstract: An integrated electrohydrodynamic jet printing and spatial atomic layer deposition system for conducting nanofabrication includes an electrohydrodynamic jet printing station that includes an E-jet printing nozzle, a spatial atomic layer deposition station that includes a zoned ALD precursor gas distributor that discharges linear zone-separated first and second ALD precursor gases, a heatable substrate plate supported on a motion actuator controllable to move the substrate plate in three dimensions, and a conveyor on which the motion actuator is supported. The conveyor is operative to move the motion actuator between the electrohydrodynamic jet printing station and the spatial atomic layer deposition station so that the substrate plate is conveyable between a printing window of the E-jet printing nozzle and a deposition window of the zoned ALD precursor gas distributor, respectively. A method of conducting area-selective atomic layer deposition is also disclosed.
    Type: Application
    Filed: July 23, 2020
    Publication date: January 28, 2021
    Inventors: Mattison Rose, Kira Barton, Neil Dasgupta, Lauren Ransohoff, Ellis Herman, Orlando Trejo, Carli Huber, Tae H. Cho, Erik Kazyak, Christopher P. Pannier
  • Patent number: 4254843
    Abstract: An electrically powered vehicle having a bank of batteries supplying electricity to an electric motor driving wheels of the vehicle includes a whirl ventilator system, a clutch system and an automatically operated, engine-generator unit for recharging the batteries. The whirl ventilator system includes housings to produce a whirling air flow rotating a fan to drive an alternator such that air flow from movement of the vehicle generates electricity to charge the batteries. The clutch system includes a clutch mechanism coupling a drive shaft and a driven shaft to impart a driving force to the wheels when the drive shaft is rotated faster than the driven shaft and to couple the driven shaft with a flywheel when the driven shaft is rotating faster than the drive shaft, the flywheel driving an alternator such that momentum of the vehicle causes the alternator to charge the batteries.
    Type: Grant
    Filed: July 20, 1979
    Date of Patent: March 10, 1981
    Inventors: Joon H. Han, Tae H. Cho