Patents by Inventor Rajeev Bajaj

Rajeev Bajaj 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: 20230052048
    Abstract: Embodiments described herein relate to integrated abrasive (IA) polishing pads, and methods of manufacturing IA polishing pads using, at least in part, surface functionalized abrasive particles in an additive manufacturing process, such as a 3D inkjet printing process. In one embodiment, a method of forming a polishing article includes dispensing a first plurality of droplets of a first precursor, curing the first plurality of droplets to form a first layer comprising a portion of a sub-polishing element, dispensing a second plurality of droplets of the first precursor and a second precursor onto the first layer, and curing the second plurality of droplets to form a second layer comprising portions of the sub-polishing element and portions of a plurality of polishing elements. Here, the second precursor includes functionalized abrasive particles having a polymerizable group chemically bonded to surfaces thereof.
    Type: Application
    Filed: September 16, 2022
    Publication date: February 16, 2023
    Inventors: Ashavani KUMAR, Ashwin CHOCKALINGAM, Sivapackia GANAPATHIAPPAN, Rajeev BAJAJ, Boyi FU, Daniel REDFIELD, Nag B. PATIBANDLA, Mario Dagio CORNEJO, Amritanshu SINHA, Yan ZHAO, Ranga Rao ARNEPALLI, Fred C. REDEKER
  • Publication number: 20230029290
    Abstract: A chemical mechanical polishing apparatus includes a platen to hold a polishing pad, a carrier to hold a substrate against a polishing surface of the polishing pad during a polishing process, a dispenser to supply a polishing liquid to the polishing surface, and a temperature control system including a body configured to contact the polishing surface or the polishing liquid on the polishing surface. The body supports a thermal control module positioned over the polishing pad.
    Type: Application
    Filed: October 4, 2022
    Publication date: January 26, 2023
    Inventors: Hari Soundararajan, Shou-Sung Chang, Haosheng Wu, Jianshe Tang, Jeonghoon Oh, Rajeev Bajaj, Andrew Siordia
  • Publication number: 20230019456
    Abstract: Embodiments described herein generally relate to a brush, a method of forming a brush, and a structure embodied in a machine readable medium used in a design process are provided. The brush includes a body and a channel configured to deliver a cleaning liquid through holes in the body. The method forms the brush using 3D printing. The structure provides details for making the brush. The disclosure herein allows a method of forming a brush that does not require the removal of active porogen.
    Type: Application
    Filed: September 15, 2022
    Publication date: January 19, 2023
    Inventor: Rajeev BAJAJ
  • Publication number: 20220402091
    Abstract: 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: Application
    Filed: June 7, 2022
    Publication date: December 22, 2022
    Inventors: Sivapackia GANAPATHIAPPAN, Boyi FU, Ashwin CHOCKALINGAM, Daniel REDFIELD, Rajeev BAJAJ, Mahendra C. ORILALL, Hou T. NG, Jason G. FUNG, Mayu YAMAMURA
  • Patent number: 11530478
    Abstract: A method of depositing a coating and a layered structure is provided. A coating is deposited on a substrate to make a layered structure, such that an interface between the coating and the substrate is formed. The coating includes silicon, oxygen, and carbon, where the carbon doping in the coating increases between the interface and the top surface of the coating. The top surface of the coating is inherently hydrophobic and icephobic, and reduces the wetting of water or ice film on the layered structure, without requiring reapplication of the coating.
    Type: Grant
    Filed: February 19, 2020
    Date of Patent: December 20, 2022
    Assignee: APPLIED MATERIALS, INC.
    Inventors: Rajeev Bajaj, Mei Chang, Deenesh Padhi
  • Publication number: 20220395958
    Abstract: Embodiments herein generally relate to polishing pads and methods of forming polishing pads. A polishing pad includes a plurality of polishing elements and a plurality of grooves disposed between the polishing elements. Each polishing element includes a plurality of individual posts. Each post includes an individual surface that forms a portion of a polishing surface of the polishing pad and one or more sidewalls extending downwardly from the individual surface. The sidewalls of the plurality of individual posts define a plurality of pores disposed between the posts.
    Type: Application
    Filed: June 14, 2021
    Publication date: December 15, 2022
    Inventors: Shiyan Akalanka Jayanath WEWALA GONNAGAHADENIYAGE, Ashwin CHOCKALINGAM, Jason Garcheung FUNG, Veera Raghava Reddy KAKIREDDY, Nandan BARADANAHALLI KENCHAPPA, Puneet Narendra JAWALI, Rajeev BAJAJ
  • Patent number: 11524384
    Abstract: Embodiments of the present disclosure provide for abrasive delivery (AD) polishing pads and manufacturing methods thereof. In one embodiment, a method of forming a polishing article includes forming a sub-polishing element from a first curable resin precursor composition and forming a plurality of polishing elements extending from the sub-polishing element. Forming the plurality of polishing elements includes forming a continuous polymer phase from a second curable resin precursor composition and forming a plurality of discontinuous abrasive delivery features disposed within the continuous polymer phase. The sub-polishing element is formed by dispensing a first plurality of droplets of the first curable resin precursor composition. The plurality polishing elements are formed by dispensing a second plurality of droplets of the second curable resin precursor composition.
    Type: Grant
    Filed: July 30, 2018
    Date of Patent: December 13, 2022
    Assignee: Applied Materials, Inc.
    Inventors: Ashwin Chockalingam, Rajeev Bajaj, Ashavani Kumar, Daniel Redfield
  • Publication number: 20220362904
    Abstract: 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: Application
    Filed: May 17, 2021
    Publication date: November 17, 2022
    Inventors: 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
  • Patent number: 11471999
    Abstract: Embodiments described herein relate to integrated abrasive (IA) polishing pads, and methods of manufacturing IA polishing pads using, at least in part, surface functionalized abrasive particles in an additive manufacturing process, such as a 3D inkjet printing process. In one embodiment, a method of forming a polishing article includes dispensing a first plurality of droplets of a first precursor, curing the first plurality of droplets to form a first layer comprising a portion of a sub-polishing element, dispensing a second plurality of droplets of the first precursor and a second precursor onto the first layer, and curing the second plurality of droplets to form a second layer comprising portions of the sub-polishing element and portions of a plurality of polishing elements. Here, the second precursor includes functionalized abrasive particles having a polymerizable group chemically bonded to surfaces thereof.
    Type: Grant
    Filed: July 23, 2018
    Date of Patent: October 18, 2022
    Assignee: APPLIED MATERIALS, INC.
    Inventors: Ashavani Kumar, Ashwin Chockalingam, Sivapackia Ganapathiappan, Rajeev Bajaj, Boyi Fu, Daniel Redfield, Nag B. Patibandla, Mario Dagio Cornejo, Amritanshu Sinha, Yan Zhao, Ranga Rao Arnepalli, Fred C. Redeker
  • Patent number: 11470956
    Abstract: Embodiments described herein generally relate to a brush, a method of forming a brush, and a structure embodied in a machine readable medium used in a design process are provided. The brush includes a body and a channel configured to deliver a cleaning liquid through holes in the body. The method forms the brush using 3D printing. The structure provides details for making the brush. The disclosure herein allows a method of forming a brush that does not require the removal of active porogen.
    Type: Grant
    Filed: March 6, 2020
    Date of Patent: October 18, 2022
    Assignee: APPLIED MATERIALS, INC.
    Inventor: Rajeev Bajaj
  • Patent number: 11453097
    Abstract: A substrate polishing apparatus is disclosed that includes a polishing platform having two or more zones, each zone adapted to receive a different slurry component. A substrate polishing system is provided having a holder to hold a substrate, a polishing platform having a polishing pad, and a distribution system adapted to dispense, in a timed sequence, at least two different slurry components selected from a group consisting of an oxidation slurry component, a material removal slurry component, and a corrosion inhibiting slurry component. Polishing methods and systems adapted to polish substrates are provided, as are numerous other aspects.
    Type: Grant
    Filed: November 21, 2019
    Date of Patent: September 27, 2022
    Assignee: Applied Materials, Inc.
    Inventors: Rajeev Bajaj, Thomas H. Osterheld, Hung Chen, Terrance Y. Lee
  • Patent number: 11446788
    Abstract: 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, and curing agents. For example, the advanced polishing pad may be formed from a plurality of polymeric layers, by the automated sequential deposition of at least one resin precursor composition followed by at least one curing step, wherein each layer may represent at least one polymer composition, and/or regions of different compositions.
    Type: Grant
    Filed: August 15, 2019
    Date of Patent: September 20, 2022
    Assignee: APPLIED MATERIALS, INC.
    Inventors: Rajeev Bajaj, Daniel Redfield, Mahendra C. Orilall, Boyi Fu, Ashwin Chockalingam, Ashavani Kumar, Fred C. Redeker, Nag B. Patibandla
  • Publication number: 20220250203
    Abstract: Embodiments of the present disclosure generally relate to structures formed using an additive manufacturing process, and more particularly, to polishing pads, and methods for manufacturing polishing pads, which may be used in a chemical mechanical polishing (CMP) process. The structures described herein are formed from a plurality of printed layers. The structure comprises a first material domain having a first material composition and a plurality of second material domains having a second material composition different from the first material composition. The first material domain is configured to have a first rate of removal and the plurality of second material domains are configured to have a different second rate of removal when an equivalent force is applied to a top surface of the first material domain and the plurality of second material domains.
    Type: Application
    Filed: February 10, 2021
    Publication date: August 11, 2022
    Inventors: Puneet Narendra JAWALI, Veera Raghava Reddy KAKIREDDY, Rajeev BAJAJ, Daniel REDFIELD
  • Publication number: 20220105602
    Abstract: A method of fabricating a polishing layer of a polishing pad includes successively depositing a plurality of layers with a 3D printer, each layer of the plurality of polishing layers deposited by ejecting a pad material precursor from a nozzle and solidifying the pad material precursor to form a solidified pad material.
    Type: Application
    Filed: December 17, 2021
    Publication date: April 7, 2022
    Inventors: Rajeev Bajaj, Barry Lee Chin, Terrance Y. Lee
  • Publication number: 20220055181
    Abstract: The present disclosure relates to retaining rings that include tunable chemical, material and structural properties, improved structural and fluid transport configurations and new methods of manufacturing the same. According to one or more embodiments of the disclosure, it has been discovered that a retaining ring with improved properties may be produced by an additive manufacturing process, such as a three-dimensional (3D) printing process. Embodiments of the present disclosure provide an advanced retaining ring that has discrete features and geometries, formed from at least two different materials that are formed from one or more polymers. The layers and/or regions of the advanced retaining ring may include a composite material structure, such as a polymer that contains at least one filler, such as metals, semimetal oxides, carbides, nitrides and/or polymer particles.
    Type: Application
    Filed: August 19, 2021
    Publication date: February 24, 2022
    Inventors: Aniruddh Jagdish Khanna, Daniel Redfield, Ehud Chatow, Kenneth Mason, Steven Turner, Rajeev Bajaj, Kieran Joseph Rynne, Periya G. Gopalan
  • Patent number: 11241839
    Abstract: Embodiments disclosed herein provide methods of forming bond pad redistribution layers (RDLs) in a fan-out wafer level packaging (FOWLP) scheme using an additive manufacturing process. In one embodiment, a method of forming a redistribution layer includes positioning a carrier substrate on a manufacturing support of an additive manufacturing system, the carrier substrate including a plurality of singulated devices, detecting one or more fiducial features corresponding to each of the plurality of singulated devices, determining actual positions of each of the plurality of singulated devices relative to one or more components of the additive manufacturing system, generating printing instructions for forming a patterned dielectric layer based on the actual positions of each of the plurality of singulated devices, and forming the patterned dielectric layer using the printing instructions.
    Type: Grant
    Filed: February 28, 2019
    Date of Patent: February 8, 2022
    Assignee: APPLIED MATERIALS, INC.
    Inventors: William H. McClintock, Rajeev Bajaj, Jason G. Fung, Daniel Redfield
  • 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: 11207758
    Abstract: A method of fabricating a polishing layer of a polishing pad includes successively depositing a plurality of layers with a 3D printer, each layer of the plurality of polishing layers deposited by ejecting a pad material precursor from a nozzle and solidifying the pad material precursor to form a solidified pad material.
    Type: Grant
    Filed: November 23, 2020
    Date of Patent: December 28, 2021
    Assignee: Applied Materials, Inc.
    Inventors: Rajeev Bajaj, Barry Lee Chin, Terrance Y. Lee
  • Publication number: 20210394333
    Abstract: Embodiments herein generally relate to polishing pads and method of forming polishing pads. In one embodiment, a polishing pad having a polishing surface that is configured to polish a surface of a substrate is provided. The polishing pad includes a polishing layer. At least a portion of the polishing layer comprises a continuous phase of polishing material featuring a plurality of first regions having a first pore-feature density and a plurality of second regions having a second pore-feature density that is different from the first pore-feature density. The plurality of first regions are distributed in a pattern in an X-Y plane of the polishing pad in a side-by-side arrangement with the plurality of second regions and individual portions or ones of the plurality of first regions are interposed between individual portions or ones of the plurality of second regions.
    Type: Application
    Filed: June 19, 2020
    Publication date: December 23, 2021
    Inventors: Puneet Narendra JAWALI, Nandan BARADANAHALLI KENCHAPPA, Jason G. FUNG, Shiyan Akalanka Jayanath WEWALA GONNAGAHADENIYAGE, Rajeev BAJAJ, Adam Wade MANZONIE, Andrew Scott LAWING
  • Publication number: 20210379726
    Abstract: A polishing pad for a semiconductor fabrication operation includes a polishing region and a window region, wherein both regions are made of an interpenetrating polymer network formed from a free-radically polymerized material and a cationically polymerized material.
    Type: Application
    Filed: June 9, 2020
    Publication date: December 9, 2021
    Inventors: Uma Sridhar, Sivapackia Ganapathiappan, Ashwin Murugappan Chockalingam, Rajeev Bajaj, Daniel Redfield, Mayu Felicia Yamamura, Yingdong Luo, Nag B. Patibandla