Patents by Inventor Hou T. Ng

Hou T. Ng 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: 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
  • Patent number: 11329003
    Abstract: A method of printing structures on a reconstructed wafer includes positioning a plurality of semiconductor dies on a support substrate, anchoring the plurality of semiconductor dies to the support substrate by printing a plurality of anchors that extend across edges of the semiconductor dies onto the support substrate and thus form a reconstructed wafer, and printing one or more device structures on the pluralities of semiconductor dies while anchored on the support substrate. The printing operations include ejecting droplets of a liquid precursor material and curing the liquid precursor material.
    Type: Grant
    Filed: April 2, 2020
    Date of Patent: May 10, 2022
    Assignee: Applied Materials, Inc.
    Inventors: Daihua Zhang, Hou T. Ng, Nag B. Patibandla, Sivapackia Ganapathiappan, Yingdong Luo, Kyuil Cho, Han-Wen Chen
  • Patent number: 11322381
    Abstract: A method for printing on a substrate includes printing a support structure by printing a liquid precursor material and curing the liquid precursor material, positioning a substrate within the support structure, printing one or more anchors on the substrate and the support structure by printing and curing the liquid precursor material to secure the substrate to the support structure, and printing one or more device structures on the substrate while anchored by printing and curing the liquid precursor material.
    Type: Grant
    Filed: April 2, 2020
    Date of Patent: May 3, 2022
    Assignee: Applied Materials, Inc.
    Inventors: Daihua Zhang, Hou T. Ng, Nag B. Patibandla, Sivapackia Ganapathiappan, Yingdong Luo, Kyuil Cho, Han-Wen Chen
  • Publication number: 20220111579
    Abstract: A method of forming a three dimensional object includes dispensing droplets of an electromagnetic energy curable liquid onto a surface to form a plurality of layers of the three dimensional object in liquid form, wherein each droplet forms a layer of liquid on the surface which is larger than a minimum feature size of a structure to be formed by curing the curable liquid, and directing electromagnetic energy capable of curing the liquid and having a beam width intersecting the layer of liquid which is at least as small as the smallest feature of a structure to be formed in the curable liquid.
    Type: Application
    Filed: October 14, 2020
    Publication date: April 14, 2022
    Inventors: Daihua ZHANG, Uma SRIDHAR, Hou T. NG, Sivapackia GANAPATHIAPPAN, Nag B. PATIBANDLA
  • 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
  • Publication number: 20220069173
    Abstract: A photocurable composition includes quantum dots, quantum dot precursor materials, a chelating agent, one or more monomers, and a photoinitiator. The quantum dots are selected to emit radiation in a first wavelength band in the visible light range in response to absorption of radiation in a second wavelength band in the UV or visible light range. The second wavelength band is different than the first wavelength band. The quantum dot precursor materials include metal atoms or metal ions corresponding to metal components present in the quantum dots. The chelating agent is configured to chelate the quantum dot precursor materials. The photoinitiator initiates polymerization of the one or more monomers in response to absorption of radiation in the second wavelength band.
    Type: Application
    Filed: August 28, 2020
    Publication date: March 3, 2022
    Inventors: Yingdong Luo, Daihua Zhang, Hou T. Ng, Sivapackia Ganapathiappan, Nag B. Patibandla
  • Publication number: 20220069175
    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: 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
  • Patent number: 11254068
    Abstract: In an example of a three-dimensional (3D) printing method, a build material (consisting of an inorganic particle and a polymer attached thereto) is applied. The polymer is a continuous coating having a thickness from about 3 nm to about 1500 nm, or nano-beads having an average diameter from about 3 nm to about 1500 nm. The build material is heated to a temperature from about 5° C. to about 50° C. below the polymer's melting point. A coalescent dispersion (including a coalescent agent and inorganic nanoparticles) is selectively applied on a portion of the build material, and the applied build material and coalescent dispersion are exposed to electromagnetic radiation. The coalescent dispersion absorbs the electromagnetic radiation and heats up the portion of the build material in contact therewith to fuse the portion of the build material in contact with the coalescent dispersion and to form a layer of a 3D object.
    Type: Grant
    Filed: October 29, 2014
    Date of Patent: February 22, 2022
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Hou T. Ng, Sivapackia Ganapathiappan, Alejandro Manuel De Pena, Edward Dale Davis, Ali Emamjomeh
  • Patent number: 11251226
    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. The controller is configured to operate the transfer device such that the transfer surface engages the adhesive on the donor substrate to cause the selected micro-devices to adhere to the transfer surface and the transfer surface then transfers the selected micro-devices from the donor substrate to the destination substrate.
    Type: Grant
    Filed: June 22, 2020
    Date of Patent: February 15, 2022
    Assignee: Applied Materials, Inc.
    Inventors: Mingwei Zhu, Sivapackia Ganapathiappan, Boyi Fu, Hou T. Ng, Nag B. Patibandla
  • Patent number: 11239213
    Abstract: A method of fabricating a multi-color display includes dispensing a photo-curable fluid over a display having an array of LEDs disposed below a cover layer. The cover has an outer surface with a plurality of recesses, and the photo-curable fluid fills the recesses. The photo-curable fluid includes a color conversion agent. A plurality of LEDs in the array are activated to illuminate and cure the photo-curable fluid to form a color conversion layer in the recesses over the activated LEDs. This layer will convert light from these LEDs to light of a first color. An uncured remainder of the photo-curable fluid is removed. Then the process is repeated with a different photo-curable fluid having a different color conversion agent and a different plurality of LEDs. This forms a second color conversion layer in different plurality of recesses to convert light from these LEDs to light of a second color.
    Type: Grant
    Filed: May 17, 2019
    Date of Patent: February 1, 2022
    Assignee: Applied Materials, Inc.
    Inventors: Daihua Zhang, Yingdong Luo, Mingwei Zhu, Hou T. Ng, Sivapackia Ganapathiappan, Nag B. Patibandla
  • Publication number: 20220029068
    Abstract: A photocurable composition includes a nanomaterial selected to emit radiation in a first wavelength band in the visible light range in response to absorption of radiation in a second wavelength band in the UV or visible light range. The second wavelength band is different than the first wavelength band. The photocurable composition further includes one or more (meth)acrylate monomers, a thiol crosslinker, and a photoinitiator that initiates polymerization of the one or more (meth)acrylate monomers in response to absorption of radiation in the second wavelength band.
    Type: Application
    Filed: July 20, 2021
    Publication date: January 27, 2022
    Inventors: Yingdong Luo, Sivapackia Ganapathiappan, Daihua Zhang, Hou T. Ng, Nag B. Patibandla
  • Publication number: 20220016708
    Abstract: Methods and systems for additive manufacturing can include a modular spreader unit including multiple spreaders that collectively span the width of a large build area. The spreaders can be arranged in offset rows so that spreaders in a second row cover gaps between spreaders in a first row. The spreaders can be secured with quick release mechanisms for rapid replacement and adjustment during service intervals.
    Type: Application
    Filed: July 14, 2021
    Publication date: January 20, 2022
    Inventors: Hou T. Ng, Daihua Zhang, Nag B. Patibandla
  • Publication number: 20220016712
    Abstract: An additive manufacturing apparatus includes a platform, a dispenser to deliver a layers of feed material onto the platform, one or more light sources to generate a first light beam and a plurality of second light beams, a galvo mirror scanner to scan the first light beam on a layer of feed material on the platform, and a plurality of polygon mirror scanners. The galvo mirror scanner has a first field of view that spans a width of a build area of the platform, whereas, each of the plurality of polygon mirror scanners having a second field of view with the plurality of polygon mirror scanners providing a plurality of second fields of view. Each second field of view is a portion of the first field of view, and the plurality of polygon mirror scanners are positioned such that the plurality of second fields of view span the width of the build area of the platform.
    Type: Application
    Filed: September 30, 2021
    Publication date: January 20, 2022
    Inventors: Bahubali S. Upadhye, Sumedh Acharya, Sandip Desai, David Masayuki Ishikawa, Eric Ng, Hou T. Ng
  • Publication number: 20220017699
    Abstract: An implementation described herein provides a binder ink mixture for 3D printing of ceramic parts in a binder jet process. The binder ink mixture includes a molecular space filler and a free radical initiator.
    Type: Application
    Filed: July 20, 2020
    Publication date: January 20, 2022
    Inventors: Yingdong Luo, Sivapackia Ganapathiappan, Daihua Zhang, Hou T. Ng, Nag B. Patibandla
  • Publication number: 20220001507
    Abstract: A method of fabricating an object using an additive manufacturing system includes receiving data indicative of a desired shape of the object to be fabricated by droplet ejection. The desired shape defines a profile including a top surface and one or more recesses. Data indicative of a pattern of dispensing feed material is generated to at least partially compensate for distortions of the profile caused by the additive manufacturing system, and a plurality of layers of the feed material are dispensed by droplet ejection in accordance to the pattern.
    Type: Application
    Filed: September 17, 2021
    Publication date: January 6, 2022
    Inventors: Mayu Felicia Yamamura, Jason Garcheung Fung, Daniel Redfield, Rajeev Bajaj, Hou T. Ng
  • Patent number: 11207826
    Abstract: An additive manufacturing system includes a platen, a dispenser apparatus positioned above the platen to dispense a layer of powder over the platen, and an energy source to selectively fuse the layer of powder. The dispenser apparatus includes a support structure, a dispenser secured to the support structure and including a reservoir to hold the powder and one or more openings configured to deliver powder from the reservoir in a linear region that extends along a first axis, a spreader extending along the first axis and secured to the support structure and positioned to spread powder already delivered on the platen by the dispenser, and a drive system to move the support structure along a second axis perpendicular to the first axis such that the dispenser and blade move together to sweep the linear region along the second axis to deposit and level the powder.
    Type: Grant
    Filed: March 30, 2018
    Date of Patent: December 28, 2021
    Assignee: Applied Materials, Inc.
    Inventors: Hou T. Ng, Raanan Zehavi, Nag B. Patibandla
  • Publication number: 20210370597
    Abstract: In one example, a non-transitory processor readable medium with instructions thereon that when executed cause an additive manufacturing machine to inhibit build material in an overlying layer of build material from fusing with a first slice formed in an underlying layer of build material.
    Type: Application
    Filed: August 12, 2021
    Publication date: December 2, 2021
    Inventors: Hou T. Ng, Alejandro Manuel De Pena
  • Publication number: 20210358742
    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 first color conversion layer over each of a first plurality of light emitting diodes, a second color conversion layer over each of a second plurality of light emitting diodes, and a plurality of isolation walls separating adjacent micro-LEDs of the array. The micro-LEDs of the array are configured to generate illumination of the same wavelength range, the first color conversion layer converts the illumination to light of a first color, and the second color conversion layer converts the illumination to light of a different second color.
    Type: Application
    Filed: July 29, 2021
    Publication date: November 18, 2021
    Inventors: Daihua Zhang, Yingdong Luo, Mingwei Zhu, Hou T. Ng, Sivapackia Ganapathiappan, Nag B. Patibandla
  • Patent number: 11154961
    Abstract: A method of fabricating a polishing pad using an additive manufacturing system includes receiving data indicative of a desired shape of the polishing pad to be fabricated by droplet ejection. The desired shape defines a profile including a polishing surface and one or more grooves on the polishing pad. Data indicative of a modified pattern of dispensing feed material is generated to at least partially compensate for distortions of the profile caused by the additive manufacturing system, and a plurality of layers of the feed material are dispensed by droplet ejection in accordance to the modified pattern.
    Type: Grant
    Filed: January 8, 2020
    Date of Patent: October 26, 2021
    Assignee: Applied Materials, Inc.
    Inventors: Mayu Felicia Yamamura, Jason Garcheung Fung, Daniel Redfield, Rajeev Bajaj, Hou T. Ng
  • Patent number: 11154935
    Abstract: An additive manufacturing apparatus includes a platform, a dispenser configured to deliver a plurality of successive layers of feed material on the platform, at least one energy source to selectively fuse feed material in a layer on the platform, and an air knife supply unit. The air knife supply unit includes a tube having a plurality of holes spaced along a length of the tube, a multi-fluted helical screw positioned in the tube, a gas inlet configured to supply a gas into an end of the tube with the screw configured to guide the gas from the gas inlet through the tube and out the holes, and a spiral plenum surrounding the tube with the spiral plenum including an inner end to receive gas from the holes and an outer end to deliver the gas over the platform.
    Type: Grant
    Filed: May 31, 2019
    Date of Patent: October 26, 2021
    Assignee: Applied Materials, Inc.
    Inventors: Bahubali S. Upadhye, Sumedh Acharya, Sandip Desai, David Masayuki Ishikawa, Eric Ng, Hou T. Ng