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).
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Patent number: 11826876Abstract: In one implementation, a method of forming a porous polishing pad is provided. The method comprises depositing a plurality of composite layers with a 3D printer to reach a target thickness. Depositing the plurality of composite layers comprises dispensing one or more droplets of a curable resin precursor composition onto a support. Depositing the plurality of composite layers further comprises dispensing one or more droplets of a porosity-forming composition onto the support, wherein at least one component of the porosity-forming composition is removable to form the pores in the porous polishing pad.Type: GrantFiled: April 4, 2019Date of Patent: November 28, 2023Assignee: Applied Materials, Inc.Inventors: Sivapackia Ganapathiappan, Boyi Fu, Ashwin Chockalingam, Ankit Vora, Daniel Redfield, Rajeev Bajaj, Nag B. Patibandla, Hou T. Ng, Sudhakar Madhusoodhanan
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Publication number: 20230352632Abstract: A multi-color display includes a backplane having backplane circuitry, an array of micro-LEDs electrically integrated with backplane circuitry of the backplane, a color conversion layer over each of a plurality of light emitting diodes, and a plurality of isolation walls separating adjacent micro-LEDs of the array.Type: ApplicationFiled: July 7, 2023Publication date: November 2, 2023Inventors: Daihua Zhang, Yingdong Luo, Mingwei Zhu, Hou T. Ng, Sivapackia Ganapathiappan, Nag B. Patibandla
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Publication number: 20230343904Abstract: Micro-LED structures include an LED epilayer that may be formed before the micro-LED structure is coupled to a backplane substrate. In order to prevent light leakage and maximize light output, the sidewalls and other surfaces of the LED epilayer may be coated with a reflective coating. For example, the reflective coating may include a metal layer that is electrically insulated between dielectric layers from the micro-LED electrodes. The reflective coating may also be formed using multiple layers in a distributed Bragg reflector configuration. This reflective coating may be formed during the LED fabrication process before the micro-LED structure is coupled to the backplane. The pixel isolation structures on the backplane may also include a reflective coating that is applied above the LED epilayers.Type: ApplicationFiled: April 24, 2023Publication date: October 26, 2023Applicant: Applied Materials, Inc.Inventors: Kai Ding, Lisong Xu, Mingwei Zhu, Zhiyong Li, Hou T. Ng, Sivapackia Ganapathiappan, Nag Patibandla
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Patent number: 11798831Abstract: 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: GrantFiled: May 2, 2022Date of Patent: October 24, 2023Assignee: Applied Materials, Inc.Inventors: Daihua Zhang, Hou T. Ng, Nag B. Patibandla, Sivapackia Ganapathiappan, Yingdong Luo, Kyuil Cho, Han-Wen Chen
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Publication number: 20230335693Abstract: Exemplary device structures may include a light emitting diode structure. The light emitting diode structure may be operable to generate light. The structures may include a photoluminescent region containing a photoluminescent material. The photoluminescent region may be positioned on the light emitting diode structure. The structures may include an ultraviolet (UV) light filter positioned above the photoluminescent region. The UV light filter may be operable to absorb light generated by the light emitting diode structure characterized by an emission wavelength of less than or about 430 nm.Type: ApplicationFiled: March 27, 2023Publication date: October 19, 2023Applicant: Applied Materials, Inc.Inventors: Sivapackia Ganapathiappan, Kulandaivelu Sivanandan, Lisong Xu, Mingwei Zhu, Hou T. Ng, Nag Patibandla
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Patent number: 11772229Abstract: Embodiments of the present disclosure relate to advanced polishing pads with tunable chemical, material and structural properties, and new methods of manufacturing the same. According to one or more embodiments of the disclosure, it has been discovered that a polishing pad with improved properties may be produced by an additive manufacturing process, such as a three-dimensional (3D) printing process. Embodiments of the present disclosure thus may provide an advanced polishing pad that has discrete features and geometries, formed from at least two different materials that include functional polymers, functional oligomers, reactive diluents, addition polymer precursor compounds, catalysts, and curing agents.Type: GrantFiled: March 11, 2019Date of Patent: October 3, 2023Assignee: Applied Materials, Inc.Inventors: Sivapackia Ganapathiappan, Boyi Fu, Ashwin Chockalingam, Daniel Redfield, Rajeev Bajaj, Mahendra C. Orilall, Hou T. Ng, Jason G. Fung, Mayu Yamamura
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Publication number: 20230290909Abstract: Exemplary pixel structures are described that include a first light emitting diode structure, operable to generate blue light characterized by a peak emission wavelength of greater than or about 450 nm, and a second light emitting diode structure positioned on the first light emitting diode structure. The second light emitting diode structure is operable to generate ultraviolet light characterized by a peak emission wavelength of less than or about 380 nm. The pixel structures may also include a photoluminescent region, containing a photoluminescent material, that is positioned on the second light emitting diode structure.Type: ApplicationFiled: March 13, 2023Publication date: September 14, 2023Applicant: Applied Materials, Inc.Inventors: Zhiyong Li, Mingwei Zhu, Hou T. Ng, Nag Patibandla, Lisong Xu, Kai Ding, Sivapackia Ganapathiappan
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Patent number: 11745302Abstract: Embodiments of the present disclosure relate to advanced polishing pads with tunable chemical, material and structural properties, and new methods of manufacturing the same. According to one or more embodiments of the disclosure, it has been discovered that a polishing pad with improved properties may be produced by an additive manufacturing process, such as a three-dimensional (3D) printing process. Embodiments of the present disclosure thus may provide an advanced polishing pad that has discrete features and geometries, formed from at least two different materials that include functional polymers, functional oligomers, reactive diluents, addition polymer precursor compounds, catalysts, and curing agents.Type: GrantFiled: March 22, 2021Date of Patent: September 5, 2023Assignee: APPLIED MATERIALS, INC.Inventors: Sivapackia Ganapathiappan, Boyi Fu, Ashwin Chockalingam, Daniel Redfield, Rajeev Bajaj, Mahendra C. Orilall, Hou T. Ng, Jason G. Fung, Mayu Yamamura
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Patent number: 11724314Abstract: 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: GrantFiled: July 14, 2021Date of Patent: August 15, 2023Assignee: Applied Materials, Inc.Inventors: Hou T. Ng, Daihua Zhang, Nag B. Patibandla
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Patent number: 11673314Abstract: In one example, an apparatus for generating a three-dimensional object includes an energy source to apply energy to a layer of build material to cause a first portion of the layer to coalesce and solidify, an agent distributor to selectively deliver a cooling agent onto a second portion of the layer, and a controller to control the energy source to apply energy to the layer to cause the first portion to coalesce and solidify in a first pattern and to control the agent distributor to selectively deliver the cooling agent onto the second portion of the layer in a second pattern independent of the first pattern.Type: GrantFiled: January 21, 2019Date of Patent: June 13, 2023Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.Inventors: Krzysztof Nauka, Esteve Comas, Alejandro Manuel De Pena, Howard S. Tom, Hou T. Ng
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Patent number: 11646397Abstract: 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: GrantFiled: August 28, 2020Date of Patent: May 9, 2023Assignee: Applied Materials, Inc.Inventors: Yingdong Luo, Daihua Zhang, Hou T. Ng, Sivapackia Ganapathiappan, Nag B. Patibandla
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Patent number: 11597054Abstract: 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: GrantFiled: September 17, 2021Date of Patent: March 7, 2023Assignee: Applied Materials, Inc.Inventors: Mayu Felicia Yamamura, Jason Garcheung Fung, Daniel Redfield, Rajeev Bajaj, Hou T. Ng
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Publication number: 20230006110Abstract: 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: ApplicationFiled: September 1, 2022Publication date: January 5, 2023Inventors: Yingdong Luo, Daihua Zhang, Hou T. Ng, Sivapackia Ganapathiappan, Nag B. Patibandla
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Publication number: 20220406960Abstract: 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: ApplicationFiled: June 17, 2021Publication date: December 22, 2022Applicant: Applied Materials, Inc.Inventors: Fabio Pieralisi, Mingwei Zhu, Zihao Yang, Liang Zhao, Jeffrey L. Franklin, Hou T. Ng, Nag Patibandla
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Publication number: 20220402091Abstract: Embodiments of the present disclosure relate to advanced polishing pads with tunable chemical, material, and structural properties, and new methods of manufacturing the same. In one or more embodiments, polishing pads with improved properties may be produced by an additive manufacturing process, such as a three-dimensional (3D) printing process. Some embodiments may provide an advanced polishing pad that has discrete features and geometries, formed from at least two different materials that include functional polymers, functional oligomers, reactive diluents, addition polymer precursor compounds, catalysts, and curing agents. For example, advanced polishing pads may be formed from a plurality of polymeric layers, by the automated sequential deposition of at least one polymer precursor composition followed by at least one curing step, where each layer may represent at least one polymer composition, and/or regions of different compositions.Type: ApplicationFiled: June 7, 2022Publication date: December 22, 2022Inventors: Sivapackia GANAPATHIAPPAN, Boyi FU, Ashwin CHOCKALINGAM, Daniel REDFIELD, Rajeev BAJAJ, Mahendra C. ORILALL, Hou T. NG, Jason G. FUNG, Mayu YAMAMURA
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Publication number: 20220399479Abstract: 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: ApplicationFiled: June 11, 2021Publication date: December 15, 2022Applicant: Applied Materials, Inc.Inventors: Lisong Xu, Mingwei Zhu, Byung Sung Kwak, Hyunsung Bang, Liang Zhao, Hou T. Ng, Sivapackia Ganapathiappan, Nag Patibandla
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Patent number: 11524455Abstract: A dispensing system for an additive manufacturing includes a powder reservoir that contains powder to form an object, and an array of nozzles positioned at a base of the powder reservoir over a top surface of a platen where the object is to be formed. The powder flows from the powder reservoir through the nozzles to the top surface. A respective powder wheel in each nozzle controls a flow rate of the powder. Each wheel has multiple troughs on surface of the wheel. When a motor rotates the wheel, the troughs transport the powder through the nozzle. The rotation speed of the wheel controls the flow rate. For solid parts of the object, the wheel rotates and allows the powder to be deposited on the top surface. For empty parts of the object, the wheel remains stationary to prevent the powder from flowing to the surface.Type: GrantFiled: November 25, 2019Date of Patent: December 13, 2022Assignee: Applied Materials, Inc.Inventors: Raanan Zehavi, Hou T. Ng, Nag B. Patibandla, Ajey M. Joshi
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Patent number: 11518097Abstract: A dispensing system for an additive manufacturing apparatus includes a frame, a powder reservoir, an agitator and an array of dispensing units positioned below the powder reservoir. The powder reservoir has a first width along a primary axis, and includes a lower portion and an upper portion that is wider than the lower portion along a second axis perpendicular to the primary axis. The agitator is positioned in the upper portion of the powder reservoir. Each dispensing unit includes a nozzle block that has a passage therethrough that defines a nozzle and provides a respective path for the powder to flow from the powder reservoir to the nozzle, and a valve positioned in the passage in the nozzle block to controllably release powder through the nozzle.Type: GrantFiled: November 25, 2019Date of Patent: December 6, 2022Assignee: Applied Materials, Inc.Inventors: Raanan Zehavi, Hou T. Ng, Nag B. Patibandla, Ajey M. Joshi
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Publication number: 20220367763Abstract: 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: ApplicationFiled: July 21, 2022Publication date: November 17, 2022Inventors: Yingdong Luo, Lisong Xu, Sivapackia Ganapathiappan, Hou T. Ng, Byung Sung Kwak, Mingwei Zhu, Nag B. Patibandla
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Publication number: 20220362904Abstract: Embodiments herein generally relate to polishing pads and methods of forming polishing pads. A method of forming a polishing pad includes (a) dispensing droplets of a pre-polymer composition and droplets of a sacrificial material composition onto a surface of a previously formed print layer according to a predetermined droplet dispense pattern. The method includes (b) at least partially curing the dispensed droplets of the pre-polymer composition to form a print layer. The method includes (c) sequentially repeating (a) and (b) to form a polishing layer having a plurality of pore-features formed therein. The pre-polymer composition includes a multifunctional acrylate component.Type: ApplicationFiled: May 17, 2021Publication date: November 17, 2022Inventors: Sivapackia GANAPATHIAPPAN, Uma SRIDHAR, Yingdong LUO, Ashwin CHOCKALINGAM, Mayu YAMAMURA, Sebastian David ROZO, Daniel REDFIELD, Rajeev BAJAJ, Nag B. PATIBANDLA, Hou T. NG, Sudhakar MADHUSOODHANAN