Patents by Inventor Mingwei Zhu

Mingwei Zhu 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: 11554514
    Abstract: A super strong and tough densified wood structure is formed by subjecting a cellulose-based natural wood material to a chemical treatment that partially removes lignin therefrom. The treated wood retains lumina of the natural wood, with cellulose nanofibers of cell walls being aligned. The treated wood is then pressed in a direction crossing the direction in which the lumina extend, such that the lumina collapse and any residual fluid within the wood is removed. As a result, the cell walls become entangled and hydrogen bonds are formed between adjacent cellulose nanofibers, thereby improving the strength and toughness of the wood among other mechanical properties. By further modifying, manipulating, or machining the densified wood, it can be adapted to various applications.
    Type: Grant
    Filed: August 23, 2021
    Date of Patent: January 17, 2023
    Assignee: UNIVERSITY OF MARYLAND, COLLEGE PARK
    Inventors: Liangbing Hu, Mingwei Zhu, Jianwei Song
  • Publication number: 20220406960
    Abstract: Exemplary processing methods include forming a group of LED structures on a substrate layer to form a patterned LED substrate. A light absorption barrier may be deposited on the patterned LED substrate. The methods may further include exposing the patterned LED substrate to light. The light may be absorbed by surfaces of the LED structures that are in contact with the substrate layer, and the light absorption barrier. The methods may still further include separating the LED structures for the substrate layer. The bonding between the LED structures and the substrate layer may be weakened by the absorption of the light by the surfaces of the LED structures in contact with the substrate layer.
    Type: Application
    Filed: June 17, 2021
    Publication date: December 22, 2022
    Applicant: Applied Materials, Inc.
    Inventors: Fabio Pieralisi, Mingwei Zhu, Zihao Yang, Liang Zhao, Jeffrey L. Franklin, Hou T. Ng, Nag Patibandla
  • Publication number: 20220399479
    Abstract: Methods of making high-pixel-density LED structures are described. The methods may include forming a backplane substrate and a LED substrate. The backplane substrate and the LED substrate may be bonded together, and the bonded substrates may include an array of LED pixels. Each of the LED pixels may include a group of isolated subpixels. A quantum dot layer may be formed on at least one of the isolated subpixels in each of the LED pixels. The methods may further include repairing at least one defective LED pixel by forming a replacement quantum dot layer on a quantum-dot-layer-free subpixel in the defective LED pixel. The methods may also include forming a UV barrier layer on the array of LED pixels after the repairing of the at least one defective LED pixel.
    Type: Application
    Filed: June 11, 2021
    Publication date: December 15, 2022
    Applicant: Applied Materials, Inc.
    Inventors: Lisong Xu, Mingwei Zhu, Byung Sung Kwak, Hyunsung Bang, Liang Zhao, Hou T. Ng, Sivapackia Ganapathiappan, Nag Patibandla
  • Publication number: 20220399474
    Abstract: Exemplary processing methods of forming an LED structure may include depositing an aluminum nitride layer on a substrate via a physical vapor deposition process. The methods may include heating the aluminum nitride layer to a temperature greater than or about 1500° C. The methods may include forming an ultraviolet light emitting diode structure overlying the aluminum nitride layer utilizing a metal-organic chemical vapor deposition or molecular beam epitaxy.
    Type: Application
    Filed: June 11, 2021
    Publication date: December 15, 2022
    Applicant: Applied Materials, Inc.
    Inventors: Zihao Yang, Mengnan Zou, Mingwei Zhu, David Masayuki Ishikawa, Nag Patibandla
  • Patent number: 11527558
    Abstract: The present application relates to a display device that is divided into a first region as a fingerprint recognition region and a second region as a display region with the first region having a first light transmittance greater than a second light transmittance of the second region. The light transmittance of the region corresponding to the fingerprint recognition module group in the display device of the present application can be increased, thereby further improving the sensitivity of the fingerprint recognition module group.
    Type: Grant
    Filed: September 12, 2019
    Date of Patent: December 13, 2022
    Assignee: KUNSHAN GO-VISIONOX OPTO-ELECTRONICS CO., LTD.
    Inventors: Xinquan Chen, Xiujian Zhu, Mingwei Ge, Zheng Wang, Xuejing Zhu
  • Publication number: 20220384705
    Abstract: A physical vapor deposition system includes a chamber, three target supports to targets, a movable shield positioned having an opening therethrough, a workpiece support to hold a workpiece in the chamber, a gas supply to deliver nitrogen gas and an inert gas to the chamber, a power source, and a controller. The controller is configured to move the shield to position the opening adjacent each target in turn, and at each target cause the power source to apply power sufficient to ignite a plasma in the chamber to cause deposition of a buffer layer, a device layer of a first material that is a metal nitride suitable for use as a superconductor at temperatures above 8° K on the buffer layer, and a capping layer, respectively.
    Type: Application
    Filed: August 8, 2022
    Publication date: December 1, 2022
    Inventors: Mingwei Zhu, Zihao Yang, Nag B. Patibandla, Ludovic Godet, Yong Cao, Daniel Lee Diehl, Zhebo Chen
  • Publication number: 20220367763
    Abstract: A light-emitting device includes a plurality of light-emitting diodes, a first cured composition over a first subset of the light-emitting diodes, and a second cured composition over a second subset of light-emitting diodes. The first cured composition includes a first photopolymer and a blue photoluminescent material that is an organic, organometallic, or polymeric material, embedded in the first photopolymer. The second cured composition includes a second photopolymer and a nanomaterial embedded in the second photopolymer. The nanomaterial is selected to emit red or green light in response.
    Type: Application
    Filed: July 21, 2022
    Publication date: November 17, 2022
    Inventors: Yingdong Luo, Lisong Xu, Sivapackia Ganapathiappan, Hou T. Ng, Byung Sung Kwak, Mingwei Zhu, Nag B. Patibandla
  • Publication number: 20220310872
    Abstract: A method for manufacturing micro-LED displays includes depositing a first material over a substrate having a plurality of micro-LEDs such that the plurality of micro-LEDs are covered by the first material and the first material fills gaps laterally separating the micro-LEDs, removing a portion of the first material from the gaps that laterally separate the plurality of micro-LEDs to form trenches that extend to or below light-emitting layers of the micro-LEDs, depositing a second material over the substrate such that the second material covers the first material and extends into the trenches, and removing a portion of the first and second material over the plurality of micro-LEDs to expose top surfaces of the plurality of micro-LEDs and such that isolation walls positioned in the gaps between the plurality of micro-LEDs extend vertically higher than the top surface of the first material.
    Type: Application
    Filed: March 22, 2022
    Publication date: September 29, 2022
    Inventors: Lisong Xu, Byung Sung Kwak, Mingwei Zhu, Hou T. Ng, Nag B. Patibandla, Christopher Dennis Bencher
  • Publication number: 20220310575
    Abstract: A display screen includes a backplane, an array of light-emitting diodes electrically integrated with the backplane, the array of light-emitting diodes configured to emit UV light in a first wavelength range, and a plurality of isolation walls formed on the backplane between adjacent light-emitting diodes of the array of light-emitting diodes with the isolation walls spaced apart from the light-emitting diodes and extending above the light-emitting diodes. The plurality of isolation walls include a core of a first material and a coating covering at least a portion of the core extending above the light-emitting diodes. The coating is an opaque second material having transmittance less than 1% of light in the first wavelength range.
    Type: Application
    Filed: March 22, 2022
    Publication date: September 29, 2022
    Inventors: Lisong Xu, Byung Sung Kwak, Mingwei Zhu, Hou T. Ng, Nag B. Patibandla, Christopher Dennis Bencher
  • Publication number: 20220302339
    Abstract: Exemplary processing methods of forming an LED structure on a backplane may include coupling a first transfer substrate with an LED source substrate. The LED source substrate may include a plurality of fabricated LEDs. The coupling of the first transfer substrate may be produced with a first coupling material extending between the first transfer substrate and each LED of the plurality of fabricated LEDs. The methods may include separating the LED source substrate from the LEDs. The methods may include coupling a second transfer substrate with the first transfer substrate. The coupling of the first transfer substrate may be produced with a second coupling material extending between the second transfer substrate and each LED of the plurality of fabricated LEDs. The methods may include separating the first transfer substrate from the second transfer substrate. The methods may include bonding the plurality of fabricated LEDs with a display backplane.
    Type: Application
    Filed: February 14, 2022
    Publication date: September 22, 2022
    Applicant: Applied Materials, Inc.
    Inventors: Hou T. Ng, Nag Patibandla, Uma Sridhar, Sivapackia Ganapathiappan, Mingwei Zhu
  • Patent number: 11441357
    Abstract: A drilling platform for amphibious operations includes: a base, wherein drive tracks are arranged on both sides of the base, a propeller is disposed at a rear end of the base, and a driving assembly is disposed inside the base; two support cylinders are respectively disposed at two ends of the base; each of the support cylinders contains a sub-cylinder; a pushing cylinder is arranged on a bottom surface of the partition plate; a buoyancy adjustment assembly is provided at a bottom of the base, so as to provide buoyancy support for the base when the base is transferred from land to water. The present invention is suitable for drilling construction of pile foundations of water and land buildings, bridge piers, and transmission line electric tower pile foundations, as well as drilling of oil wells, wherein the drilling platform construction process at different drilling points is omitted.
    Type: Grant
    Filed: September 25, 2019
    Date of Patent: September 13, 2022
    Assignee: SOUTHWEST PETROLEUM UNIVERSITY
    Inventors: Junwei Zhang, Liang Guo, Chun Pei, Ziwei Xiao, Mingwei Liao, Baoquan Wang, Deliang Qian, Youjun Ji, Jiao Zhu, Hui Guo
  • Patent number: 11437559
    Abstract: A physical vapor deposition system includes a chamber, three target supports to targets, a movable shield positioned having an opening therethrough, a workpiece support to hold a workpiece in the chamber, a gas supply to deliver nitrogen gas and an inert gas to the chamber, a power source, and a controller. The controller is configured to move the shield to position the opening adjacent each target in turn, and at each target cause the power source to apply power sufficient to ignite a plasma in the chamber to cause deposition of a buffer layer, a device layer of a first material that is a metal nitride suitable for use as a superconductor at temperatures above 8° K on the buffer layer, and a capping layer, respectively.
    Type: Grant
    Filed: March 18, 2020
    Date of Patent: September 6, 2022
    Assignee: Applied Materials, Inc.
    Inventors: Mingwei Zhu, Zihao Yang, Nag B. Patibandla, Ludovic Godet, Yong Cao, Daniel Lee Diehl, Zhebo Chen
  • Publication number: 20220259412
    Abstract: Highly transparent (up to 92% light transmittance) wood composites have been developed. The process of fabricating the transparent wood composites includes lignin removal followed by index-matching polymer infiltration resulted in fabrication of the transparent wood composites with preserved naturally aligned nanoscale fibers. The thickness of the transparent wood composite can be tailored by controlling the thickness of the initial wood substrate. The optical transmittance can be tailored by selecting infiltrating polymers with different refractive indices. The transparent wood composites have a range of applications in biodegradable electronics, optoelectronics, as well as structural and energy efficient building materials. By coating the transparent wood composite layer on the surface of GaAs thin film solar cell, an 18% enhancement in the overall energy conversion efficiency has been attained.
    Type: Application
    Filed: May 2, 2022
    Publication date: August 18, 2022
    Inventors: Liangbing HU, Mingwei ZHU, Tian LI, Amy S. GONG, Jianwei SONG
  • Publication number: 20220254953
    Abstract: Method for cleaning and encapsulating microLED features are disclosed. Some embodiments provide for a wet clean process and a dry clean process to remove contaminants from the microLED feature. Some embodiments provide for the encapsulation of a clean microLED feature. Some embodiments provide improved crystallinity of the microLED feature and the capping layer. Some embodiments provide improved EQE of microLED devices formed from the disclosed microLED features.
    Type: Application
    Filed: April 26, 2022
    Publication date: August 11, 2022
    Applicant: Applied Materials, Inc.
    Inventors: Thomas Knisley, Bhaskar Jyoti Bhuyan, Mark Saly, Mingwei Zhu
  • Patent number: 11404612
    Abstract: A light-emitting device includes a plurality of light-emitting diodes, a first cured composition over a first subset of the light-emitting diodes, and a second cured composition over a second subset of light-emitting diodes. The first cured composition includes a first photopolymer and a blue photoluminescent material that is an organic, organometallic, or polymeric material, embedded in the first photopolymer. The second cured composition includes a second photopolymer and a nanomaterial embedded in the second photopolymer. The nanomaterial is selected to emit red or green light in response.
    Type: Grant
    Filed: August 28, 2020
    Date of Patent: August 2, 2022
    Assignee: Applied Materials, Inc.
    Inventors: Yingdong Luo, Lisong Xu, Sivapackia Ganapathiappan, Hou T. Ng, Byung Sung Kwak, Mingwei Zhu, Nag B. Patibandla
  • Publication number: 20220189933
    Abstract: A multi-color display includes a backplane having backplane circuitry, an array of micro-LEDs electrically integrated with backplane circuitry of the backplane, a cover layer spanning the LEDs and having a plurality of recesses, and first and second color conversion layers. Each recess of the plurality of recesses positioned over a corresponding micro-LED from the plurality of micro-LEDs, the first color conversion layer is in each recess over a first plurality of LEDs to convert the illumination from the first plurality of LEDs to light of a first color, and the second color conversion layer is in each recess over a second plurality of LEDs to convert the illumination from the second plurality of LEDs to light of a different second color.
    Type: Application
    Filed: January 28, 2022
    Publication date: June 16, 2022
    Inventors: Daihua Zhang, Yingdong Luo, Mingwei Zhu, Hou T. Ng, Sivapackia Ganapathiappan, Nag B. Patibandla
  • Publication number: 20220165789
    Abstract: An apparatus for positioning micro-devices on a substrate includes one or more supports to hold a donor substrate and a destination substrate, an adhesive dispenser to deliver adhesive on micro-devices on the donor substrate, a transfer device including a transfer surface to transfer the micro-devices from the donor substrate to the destination substrate, and a controller. The controller is configured to operate the adhesive dispenser to selectively dispense the adhesive onto selected micro-devices on the donor substrate based on a desired spacing of the selected micro-devices on the destination substrate.
    Type: Application
    Filed: February 11, 2022
    Publication date: May 26, 2022
    Inventors: Mingwei Zhu, Sivapackia Ganapathiappan, Boyi Fu, Hou T. Ng, Nag B. Patibandla
  • Patent number: 11342481
    Abstract: Method for cleaning and encapsulating microLED features are disclosed. Some embodiments provide for a wet clean process and a dry clean process to remove contaminants from the microLED feature. Some embodiments provide for the encapsulation of a clean microLED feature. Some embodiments provide improved crystallinity of the microLED feature and the capping layer. Some embodiments provide improved EQE of microLED devices formed from the disclosed microLED features.
    Type: Grant
    Filed: May 26, 2020
    Date of Patent: May 24, 2022
    Assignee: APPLIED MATERIALS, INC.
    Inventors: Thomas Knisley, Bhaskar Jyoti Bhuyan, Mark Saly, Mingwei Zhu
  • Publication number: 20220149250
    Abstract: Exemplary pixel structures may include a pixel structure of a display device panel stack. The structures may include a first panel. The first panel may include a plurality of ultraviolet light sources disposed on a backplane. The structures may also include a second panel. The second panel may be coupled with the first panel. The second panel may have an inner surface facing the ultraviolet light sources. The second panel may include a transparent substrate and a down-conversion layer. The down-conversion layer may be disposed overlying the transparent substrate. The down-conversion layer may be configured to down-convert ultraviolet light into visible light. The plurality of ultraviolet light sources and the inner surface of the second panel may be separated by a distance of at least 2 ?m.
    Type: Application
    Filed: November 9, 2021
    Publication date: May 12, 2022
    Applicant: Applied Materials, Inc.
    Inventors: Robert Anthony Nordsell, Mingwei Zhu, Nag Patibandla, John D. Busch, Moon Young Shin, Asha Parekh, Hou T. Ng
  • Publication number: 20220069174
    Abstract: A photocurable composition includes a blue photoluminescent material, one or more monomers, and a photoinitiator that initiates polymerization of the one or more monomers in response to absorption of the ultraviolet light. The blue photoluminescent material is selected to absorb ultraviolet light with a maximum wavelength in a range of about 300 nm to about 430 nm and to emit blue light. The blue photoluminescent material also has an emission peak in a range of about 420 nm to about 480 nm. The full width at half maximum of the emission peak is less than 100 nm, and the photoluminescence quantum yield is in a range of 5% to 100%.
    Type: Application
    Filed: August 28, 2020
    Publication date: March 3, 2022
    Inventors: Yingdong Luo, Lisong Xu, Sivapackia Ganapathiappan, Hou T. Ng, Byung Sung Kwak, Mingwei Zhu, Nag B. Patibandla