Patents by Inventor Wai-Fan Yau

Wai-Fan Yau 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: 20210035767
    Abstract: Embodiments of the present disclosure generally relate to a method for forming and treating a component in semiconductor manufacturing. In one embodiment, a method for treating a chamber component used in vacuum processing includes obtaining the chamber component including a recess formed in a surface of the chamber component, the surface being fabricated from a metal, and the recess has a depth ranging from about 0.5 mm to about 10 mm and a width ranging from about 1 mm to about 15 mm. The method further includes polishing the bottom surface of the recess using a laser to form a polished bottom surface having an Ra number of 1 micron or less. The laser can achieve high quality surface finishing.
    Type: Application
    Filed: July 29, 2019
    Publication date: February 4, 2021
    Inventors: Gang Grant PENG, Wai-Fan YAU, David W. GROECHEL, Frank F. HOOSHDARAN, Tom K. CHO, Yao-Hung YANG
  • Publication number: 20160336149
    Abstract: A method and apparatus for monitoring wear of a chamber component is disclosed herein. In one embodiment, a chamber component is provided. The chamber component includes a body including a first material, a second material disposed on the first material, the second material having an exposed surface defining an interior surface of the chamber component, and a wear surface disposed at a wear depth below the exposed surface of the second material, the wear surface comprising a third material having a composition that is different than a composition of the first material and the second material.
    Type: Application
    Filed: May 15, 2015
    Publication date: November 17, 2016
    Inventors: Mats LARSSON, Wai-Fan YAU
  • Publication number: 20140190632
    Abstract: A method and apparatus for etching photomasks is provided herein. In one embodiment, a method of etching a photomask includes providing a process chamber having a substrate support pedestal adapted to receive a photomask substrate thereon. An ion-radical shield is disposed above the pedestal. A substrate is placed upon the pedestal beneath the ion-radical shield. A process gas is introduced into the process chamber and a plasma is formed from the process gas. The substrate is etched predominantly with radicals that pass through the shield.
    Type: Application
    Filed: October 9, 2013
    Publication date: July 10, 2014
    Applicant: APPLIED MATERIALS, INC.
    Inventors: Ajay KUMAR, Madhavi CHANDRACHOOD, Scott Alan ANDERSON, Peter SATITPUNWAYCHA, Wai-Fan YAU
  • Publication number: 20130040231
    Abstract: Methods for fabricating a photomask are disclosed herein. In one embodiment, a method for fabricating a photomask includes providing a filmstack having a molybdenum layer and a light-shielding layer in a processing chamber, patterning a first resist layer on the light-shielding layer, etching the light-shielding layer using the first resist layer as an etch mask, and etching the molybdenum layer using the patterned light-shielding layer and the patterned first resist layer as a composite mask.
    Type: Application
    Filed: October 16, 2012
    Publication date: February 14, 2013
    Inventors: Madhavi Chandrachood, Ajay Kumar, Wai-Fan Yau
  • Patent number: 8293430
    Abstract: Methods for fabricating a photomask are disclosed herein. In one embodiment, a method for fabricating a photomask includes providing a filmstack having a molybdenum layer and a light-shielding layer in a processing chamber, patterning a first resist layer on the light-shielding layer, etching the light-shielding layer using the first resist layer as an etch mask, and etching the molybdenum layer using the patterned light-shielding layer and the patterned first resist layer as a composite mask.
    Type: Grant
    Filed: January 27, 2005
    Date of Patent: October 23, 2012
    Assignee: Applied Materials, Inc.
    Inventors: Madhavi Chandrachood, Ajay Kumar, Wai-Fan Yau
  • Patent number: 8187951
    Abstract: Methods of lining and/or filling gaps on a substrate by creating flowable silicon oxide-containing films are provided. The methods involve introducing vapor-phase silicon-containing precursor and oxidant reactants into a reaction chamber containing the substrate under conditions such that a condensed flowable film is formed on the substrate. The flowable film at least partially fills gaps on the substrates and is then converted into a silicon oxide film. In certain embodiments, the methods involve using a catalyst, e.g., a nucleophile or onium catalyst, in the formation of the film. The catalyst may be incorporated into one of the reactants and/or introduced as a separate reactant. Also provided are methods of converting the flowable film to a solid dielectric film. The methods of this invention may be used to line or fill high aspect ratio gaps, including gaps having aspect ratios ranging from 3:1 to 10:1.
    Type: Grant
    Filed: November 24, 2009
    Date of Patent: May 29, 2012
    Assignee: Novellus Systems, Inc.
    Inventors: Feng Wang, Victor Y. Lu, Brian Lu, Wai-Fan Yau, Nerissa Draeger
  • Publication number: 20120083134
    Abstract: Systems, methods, and apparatus for depositing a protective layer on a wafer substrate are disclosed. In one aspect, a protective layer is deposited over a surface of a wafer substrate using a process configured to produce substantially less damage in the wafer substrate than a first plasma-assisted deposition process. The protective layer is less than about 100 Angstroms thick. A barrier layer is deposited over the protective layer using the first plasma-assisted deposition process.
    Type: Application
    Filed: September 15, 2011
    Publication date: April 5, 2012
    Inventors: Hui-Jung WU, Kay SONG, Victor LU, Kie Jin PARK, Wai-Fan YAU
  • Patent number: 7888273
    Abstract: Multi-cycle methods result in dense, seamless and void-free dielectric gap fill are provided. The methods involve forming liquid or flowable films that partially fill a gap, followed by a solidification and/or anneal process that uniformly densifies the just-formed film. The thickness of the layer formed is such that the subsequent anneal process creates a film that does not have a density gradient. The process is then repeated as necessary to wholly or partially fill or line the gap as desired. The methods of this invention may be used to line or fill high aspect ratio gaps, including gaps having aspect ratios greater than about 6:1 with widths less than about 0.13 ?m.
    Type: Grant
    Filed: August 6, 2007
    Date of Patent: February 15, 2011
    Assignee: Novellus Systems, Inc.
    Inventors: Feng Wang, Victor Y. Lu, Brian Lu, Wai-Fan Yau
  • Patent number: 7790334
    Abstract: A method for etching chromium and forming a photomask is provided. In one embodiment, a method for etching chromium includes providing a film stack in a processing chamber having a chromium layer, patterning a photoresist layer on the film stack, depositing a conformal protective layer on the patterned photoresist layer, etching the conformal protective layer to expose a chromium layer through the patterned photoresist layer, and etching the chromium layer. The methods for etching chromium of the present invention are particularly suitable for fabricating photomasks.
    Type: Grant
    Filed: January 27, 2005
    Date of Patent: September 7, 2010
    Assignee: Applied Materials, Inc.
    Inventors: Madhavi Chandrachood, Ajay Kumar, Wai-Fan Yau
  • Patent number: 7678709
    Abstract: A deposition method modulates the reaction rate and thickness of highly conformal dielectric films deposited by forming a saturated catalytic layer on the surface and then exposing the surface to silicon-containing precursor gas and a reaction modulator, which may accelerate or quench the reaction. The modulator may be added before, after, or during exposure of the silicon-containing precursor gas. The film thickness after one cycle of deposition may be increased up to 20 times or decreased up to 20 times.
    Type: Grant
    Filed: July 24, 2007
    Date of Patent: March 16, 2010
    Assignee: Novellus Systems, Inc.
    Inventors: Brian Lu, Wai-Fan Yau, Collin Mui, Bunsen Nie, Raihan Tarafdar
  • Patent number: 7658969
    Abstract: A method and apparatus for process integration in manufacture of a ask are disclosed. In one embodiment, a cluster tool suitable for process integration in manufacture of a photomask including a vacuum transfer chamber having coupled thereto at least one hard mask deposition chamber and at least one plasma chamber configured for etching chromium. In another embodiment, a method for process integration in manufacture of a photomask includes depositing a hard mask on a substrate in a first processing chamber, depositing a resist layer on the substrate, patterning the resist layer, etching the hard mask through apertures formed in the patterned resist layer in a second chamber; and etching a chromium layer through apertures formed in the hard mask in a third chamber.
    Type: Grant
    Filed: November 29, 2006
    Date of Patent: February 9, 2010
    Assignee: Applied Materials, Inc.
    Inventors: Ajay Kumar, Virinder Grewal, Wai-Fan Yau
  • Patent number: 7651725
    Abstract: A method and apparatus for depositing a low dielectric constant film by reaction of an organo silane compound and an oxidizing gas. The oxidized organo silane film has excellent barrier properties for use as a liner or cap layer adjacent other dielectric layers. The oxidized organo silane film can also be used as an etch stop or an intermetal dielectric layer for fabricating dual damascene structures. The oxidized organo silane films also provide excellent adhesion between different dielectric layers. A preferred oxidized organo silane film is produced by reaction of methyl silane, CH3SiH3, and N2O.
    Type: Grant
    Filed: October 24, 2007
    Date of Patent: January 26, 2010
    Assignee: Applied Materials, Inc.
    Inventors: Wai-Fan Yau, David Cheung, Shin-Puu Jeng, Kuowei Liu, Yung-Cheng Yu
  • Patent number: 7629227
    Abstract: Methods of lining and/or filling gaps on a substrate by creating flowable silicon oxide-containing films are provided. The methods involve introducing vapor-phase silicon-containing precursor and oxidant reactants into a reaction chamber containing the substrate under conditions such that a condensed flowable film is formed on the substrate. The flowable film at least partially fills gaps on the substrates and is then converted into a silicon oxide film. In certain embodiments, the methods involve using a catalyst, e.g., a nucleophile or onium catalyst, in the formation of the film. The catalyst may be incorporated into one of the reactants and/or introduced as a separate reactant. Also provided are methods of converting the flowable film to a solid dielectric film. The methods of this invention may be used to line or fill high aspect ratio gaps, including gaps having aspect ratios ranging from 3:1 to 10:1.
    Type: Grant
    Filed: October 26, 2007
    Date of Patent: December 8, 2009
    Assignee: Novellus Systems, Inc.
    Inventors: Feng Wang, Victor Y. Lu, Brian Lu, Wai-Fan Yau, Nerissa Draeger
  • Patent number: 7560377
    Abstract: A method and apparatus for depositing a low dielectric constant film by reaction of an organosilicon compound and an oxidizing gas comprising carbon at a constant RF power level. Dissociation of the oxidizing gas can be increased prior to mixing with the organosilicon compound, preferably within a separate microwave chamber, to assist in controlling the carbon content of the deposited film. The oxidized organosilane or organosiloxane film has good barrier properties for use as a liner or cap layer adjacent other dielectric layers. The oxidized organosilane or organosiloxane film may also be used as an etch stop and an intermetal dielectric layer for fabricating dual damascene structures. The oxidized organosilane or organosiloxane films also provide excellent adhesion between different dielectric layers.
    Type: Grant
    Filed: March 22, 2005
    Date of Patent: July 14, 2009
    Assignee: Applied Materials, Inc.
    Inventors: David Cheung, Wai-Fan Yau, Robert P. Mandal, Shin-Puu Jeng, Kuo-Wei Liu, Yung-Cheng Lu, Michael Barnes, Ralf B. Willecke, Farhad Moghadam, Tetsuya Ishikawa, Tze Wing Poon
  • Patent number: 7482247
    Abstract: Conformal nanolaminate dielectric deposition and etch back processes that can fill high aspect ratio (typically at least 5:1, for example 6:1), narrow width (typically sub 0.13 micron, for example 0.1 micron or less) gaps with significantly reduced incidence of voids or weak spots involve the use of any suitable confirmal dielectric deposition technique and a dry etch back. The etch back part of the process involves a single step or an integrated multi-step (for example, two-step) procedure including an anisotropic dry etch followed by an isotropic dry etch. The all dry deposition and etch back process in a single tool increases throughput and reduces handling of wafers resulting in more efficient and higher quality nanolaminate dielectric gap fill operations.
    Type: Grant
    Filed: September 19, 2006
    Date of Patent: January 27, 2009
    Assignee: Novellus Systems, Inc.
    Inventors: George D. Papasouliotis, Raihan M. Tarafdar, Ron Rulkins, Dennis M. Hausmann, Jeff Tobin, Adrianne K. Tipton, Bunsen Nie, Wai-Fan Yau, Brian G. Lu, Timothy M. Archer, Sasson Roger Somekh
  • Publication number: 20080061439
    Abstract: A method and apparatus for depositing a low dielectric constant film by reaction of an organo silane compound and an oxidizing gas. The oxidized organo silane film has excellent barrier properties for use as a liner or cap layer adjacent other dielectric layers. The oxidized organo silane film can also be used as an etch stop or an intermetal dielectric layer for fabricating dual damascene structures. The oxidized organo silane films also provide excellent adhesion between different dielectric layers. A preferred oxidized organo silane film is produced by reaction of methyl silane, CH3SiH3, and N2O.
    Type: Application
    Filed: October 23, 2007
    Publication date: March 13, 2008
    Inventors: Wai-Fan Yau, David Cheung, Shin-Puu Jeng, Kuowei Liu, Yung-Cheng Yu
  • Publication number: 20080064225
    Abstract: A method and apparatus for depositing a low dielectric constant film by reaction of an organo silane compound and an oxidizing gas. The oxidized organo silane film has excellent barrier properties for use as a liner or cap layer adjacent other dielectric layers. The oxidized organo silane film can also be used as an etch stop or an intermetal dielectric layer for fabricating dual damascene structures. The oxidized organo silane films also provide excellent adhesion between different dielectric layers. A preferred oxidized organo silane film is produced by reaction of methyl silane, CH3SiH3, and N2O.
    Type: Application
    Filed: October 23, 2007
    Publication date: March 13, 2008
    Inventors: Wai-Fan Yau, David Cheung, Shin-Puu Jeng, Kuowei Liu, Yung-Cheng Yu
  • Publication number: 20080044557
    Abstract: A method and apparatus for depositing a low dielectric constant film by reaction of an organo silane compound and an oxidizing gas. The oxidized organo silane film has excellent barrier properties for use as a liner or cap layer adjacent other dielectric layers. The oxidized organo silane film can also be used as an etch stop or an intermetal dielectric layer for fabricating dual damascene structures. The oxidized organo silane films also provide excellent adhesion between different dielectric layers. A preferred oxidized organo silane film is produced by reaction of methyl silane, CH3SiH3, and N2O.
    Type: Application
    Filed: October 24, 2007
    Publication date: February 21, 2008
    Inventors: WAI-FAN YAU, David Cheung, Shin-Puu Jeng, Kuowei Liu, Yung-Cheng Yu
  • Patent number: 7320942
    Abstract: A method for removal of metallic residue from a substrate after a plasma etch process in a semiconductor substrate processing system by cleaning the substrate in a hydrogen fluoride solution.
    Type: Grant
    Filed: November 1, 2002
    Date of Patent: January 22, 2008
    Assignee: Applied Materials, Inc.
    Inventors: Xiaoyi Chen, Chentsau Ying, Padmapani C. Nallan, Ajay Kumar, Ralph C. Kerns, Ying Rui, Chun Yan, Guowen Ding, Wai-Fan Yau
  • Patent number: 7227244
    Abstract: A method of depositing and etching dielectric layers having low dielectric constants and etch rates that vary by at least 3:1 for formation of horizontal interconnects. The amount of carbon or hydrogen in the dielectric layer is varied by changes in deposition conditions to provide low k dielectric layers that can replace etch stop layers or conventional dielectric layers in damascene applications. A dual damascene structure having two or more dielectric layers with dielectric constants lower than about 4 can be deposited in a single reactor and then etched to form vertical and horizontal interconnects by varying the concentration of a carbon:oxygen gas such as carbon monoxide. The etch gases for forming vertical interconnects preferably comprises CO and a fluorocarbon, and CO is preferably excluded from etch gases for forming horizontal interconnects.
    Type: Grant
    Filed: August 24, 2004
    Date of Patent: June 5, 2007
    Assignee: Applied Materials, Inc.
    Inventors: Claes H. Bjorkman, Melissa Min Yu, Hongquing Shan, David W. Cheung, Wai-Fan Yau, Kuowei Liu, Nasreen Gazala Chapra, Gerald Yin, Farhad K. Moghadam, Judy H. Huang, Dennis Yost, Betty Tang, Yunsang Kim