Patents by Inventor Asao Yamashita

Asao Yamashita 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: 9022225
    Abstract: Provided is a filtration filer with which a stable opening size during filtration is obtained, and which can be easily regenerated when clogged and used repeatedly. The filtration filter (10) comprises: a substrate stack wherein substrates (11) that have a through hole that penetrates from front to back are stacked; stoppers (15) that define the spacing between the substrates (11); and pillars (16) with a larger thermal expansion coefficient than the stoppers (15). The spacing between the substrates (11) at normal temperature is defined at least by the stoppers (15), and the spacing when heated is defined by the thermally expanded pillars (16). The gaps between the substrates (11) form the filtration surface that traps contaminants contained in the liquid that is being treated A.
    Type: Grant
    Filed: March 13, 2012
    Date of Patent: May 5, 2015
    Assignee: Tokyo Electron Limited
    Inventors: Tsuyoshi Moriya, Asao Yamashita
  • Publication number: 20140008290
    Abstract: Provided is a filtration filer with which a stable opening size during filtration is obtained, and which can be easily regenerated when clogged and used repeatedly. The filtration filter (10) comprises: a substrate stack wherein substrates (11) that have a through hole that penetrates from front to back are stacked; stoppers (15) that define the spacing between the substrates (11); and pillars (16) with a larger thermal expansion coefficient than the stoppers (15). The spacing between the substrates (11) at normal temperature is defined at least by the stoppers (15), and the spacing when heated is defined by the thermally expanded pillars (16). The gaps between the substrates (11) form the filtration surface that traps contaminants contained in the liquid that is being treated A.
    Type: Application
    Filed: March 13, 2012
    Publication date: January 9, 2014
    Applicant: TOKYO ELECTRON LIMITED
    Inventors: Tsuyoshi Moriya, Asao Yamashita
  • Patent number: 8501628
    Abstract: A method for etching a differential metal gate structure on a substrate is described. The differential metal gate structure includes a metal gate layer overlying a high dielectric constant (high-k) dielectric layer, wherein the metal gate layer comprises a different thickness at different regions on the substrate. The metal gate layer is patterned by using a plasma etching process, wherein at least one etch step includes forming plasma using a halogen-containing gas and at least one etch step includes forming plasma using an additive gas having as atomic constituents C, H, and F.
    Type: Grant
    Filed: March 23, 2010
    Date of Patent: August 6, 2013
    Assignee: Tokyo Electron Limited
    Inventors: Vinh Hoang Luong, Hiroyuki Takahashi, Akiteru Ko, Asao Yamashita, Vaidya Bharadwaj, Takashi Enomoto, Daniel J. Prager
  • Patent number: 8251011
    Abstract: An apparatus, which performs a plasma process on a target substrate by using plasma, includes first and second electrodes in a process chamber to oppose each other. An RF field, which turns a process gas into plasma by excitation, is formed between the first and second electrodes. An RF power supply, which supplies RF power, is connected to the first or second electrode through a matching circuit. The matching circuit automatically performs input impedance matching relative to the RF power. A variable impedance setting section is connected to a predetermined member, which is electrically coupled with the plasma, through an interconnection. The impedance setting section sets a backward-direction impedance against an RF component input to the predetermined member from the plasma. A controller supplies a control signal concerning a preset value of the backward-direction impedance to the impedance setting section.
    Type: Grant
    Filed: May 31, 2007
    Date of Patent: August 28, 2012
    Assignee: Tokyo Electron Limited
    Inventors: Yohei Yamazawa, Manabu Iwata, Chishio Koshimizu, Fumihiko Higuchi, Akitaka Shimizu, Asao Yamashita, Nobuhiro Iwama, Tsutomu Higashiura, DongSheng Zhang, Michiko Nakaya, Norikazu Murakami
  • Patent number: 8183062
    Abstract: The invention can provide apparatus and methods of creating metal gate structures on wafers in real-time using Lithography-Etch-Lithography-Etch (LELE) processing sequence. Real-time data and/or historical data associated with LELE processing sequences can be fed forward and/or fed back as fixed variables or constrained variables in internal-Integrated-Metrology modules (i-IMM) to improve the accuracy of the metal gate structures.
    Type: Grant
    Filed: February 24, 2009
    Date of Patent: May 22, 2012
    Assignee: Tokyo Electron Limited
    Inventors: Merritt Funk, Radha Sundararajan, Asao Yamashita, Daniel Prager
  • Patent number: 8175736
    Abstract: A processing system and method for chemical oxide removal (COR) is presented, wherein the processing system comprises a first treatment chamber and a second treatment chamber, wherein the first and second treatment chambers are coupled to one another. The first treatment chamber comprises a chemical treatment chamber that provides a temperature controlled chamber, and an independently temperature controlled substrate holder for supporting a substrate for chemical treatment. The substrate is exposed to a gaseous chemistry, such as HF/NH3, under controlled conditions including surface temperature and gas pressure. The second treatment chamber comprises a heat treatment chamber that provides a temperature controlled chamber, thermally insulated from the chemical treatment chamber. The heat treatment chamber provides a substrate holder for controlling the temperature of the substrate to thermally process the chemically treated surfaces on the substrate.
    Type: Grant
    Filed: December 9, 2010
    Date of Patent: May 8, 2012
    Assignee: Tokyo Electron Limited
    Inventors: Masayuki Tomoyasu, Merritt Funk, Kevin A. Pinto, Masaya Odagiri, Lemuel Chen, Asao Yamashita, Akira Iwami, Hiroyuki Takahashi
  • Publication number: 20110307089
    Abstract: A processing system and method for chemical oxide removal (COR) is presented, wherein the processing system comprises a first treatment chamber and a second treatment chamber, wherein the first and second treatment chambers are coupled to one another. The first treatment chamber comprises a chemical treatment chamber that provides a temperature controlled chamber, and an independently temperature controlled substrate holder for supporting a substrate for chemical treatment. The substrate is exposed to a gaseous chemistry, such as HF/NH3, under controlled conditions including surface temperature and gas pressure. The second treatment chamber comprises a heat treatment chamber that provides a temperature controlled chamber, thermally insulated from the chemical treatment chamber. The heat treatment chamber provides a substrate holder for controlling the temperature of the substrate to thermally process the chemically treated surfaces on the substrate.
    Type: Application
    Filed: December 9, 2010
    Publication date: December 15, 2011
    Applicant: TOKYO ELECTRON LIMITED
    Inventors: Masayuki TOMOYASU, Merritt Lane Funk, Kevin Augustine Pinto, Masaya Odagiri, Lemuel Chen, Asao Yamashita, Akira Iwami, Hiroyuki Takahashi
  • Publication number: 20110237084
    Abstract: A method for etching a differential metal gate structure on a substrate is described. The differential metal gate structure includes a metal gate layer overlying a high dielectric constant (high-k) dielectric layer, wherein the metal gate layer comprises a different thickness at different regions on the substrate. The metal gate layer is patterned by using a plasma etching process, wherein at least one etch step includes forming plasma using a halogen-containing gas and at least one etch step includes forming plasma using an additive gas having as atomic constituents C, H, and F.
    Type: Application
    Filed: March 23, 2010
    Publication date: September 29, 2011
    Applicant: TOKYO ELECTRON LIMITED
    Inventors: Vinh Hoang LUONG, Hiroyuki TAKAHASHI, Akiteru KO, Asao YAMASHITA, Vaidyanathan BALASUBRAMANIAM, Takashi ENOMOTO, Daniel J. PRAGER
  • Patent number: 8019458
    Abstract: The invention provides a method of processing a wafer using multilayer processing sequences and Multi-Layer/Multi-Input/Multi-Output (MLMIMO) models and libraries that can include one or more measurement procedures, one or more Poly-Etch (P-E) sequences, and one or more metal-gate etch sequences. The MLMIMO process control uses dynamically interacting behavioral modeling between multiple layers and/or multiple process steps. The multiple layers and/or the multiple process steps can be associated with the creation of lines, trenches, vias, spacers, contacts, and gate structures that can be created using isotropic and/or anisotropic etch processes.
    Type: Grant
    Filed: August 6, 2008
    Date of Patent: September 13, 2011
    Assignee: Tokyo Electron Limited
    Inventors: Merritt Funk, Radha Sundararajan, Asao Yamashita, Daniel Prager, Hyung Joo Lee
  • Patent number: 7967995
    Abstract: The invention provides a method of processing a substrate using multilayer processing sequences and Multi-Layer/Multi-Input/Multi-Output (MLMIMO) models and libraries that can include one or more masking layer creation procedures, one or more pre-processing measurement procedures, one or more Partial-Etch (P-E) procedures, one or more Final-Etch (F-E) procedures, and one or more post-processing measurement procedures.
    Type: Grant
    Filed: March 31, 2008
    Date of Patent: June 28, 2011
    Assignee: Tokyo Electron Limited
    Inventors: Merritt Funk, Radha Sundararajan, Hyung Joo Lee, Daniel Prager, Asao Yamashita
  • Patent number: 7939450
    Abstract: The invention can provide a method of processing a substrate using S-O processing sequences and evaluation libraries that can include one or more optimized spacer creation and evaluation procedures.
    Type: Grant
    Filed: September 21, 2007
    Date of Patent: May 10, 2011
    Assignee: Tokyo Electron Limited
    Inventors: Asao Yamashita, Merritt Funk, Daniel J. Prager, Lee Chen, Radha Sundararajan
  • Patent number: 7906032
    Abstract: A method of conditioning a processing chamber for a production process includes performing a conditioning step at a conditioning process recipe substantially different than a process recipe of the production process, and performing a warm-up process at a warm-up process recipe substantially the same as the process recipe of the production process. The method can be performed after a wet-cleaning process has been performed. The conditioning procedure can allow the maintenance time to be decreased and can cause the etched features to be more accurate.
    Type: Grant
    Filed: March 31, 2006
    Date of Patent: March 15, 2011
    Assignee: Tokyo Electron Limited
    Inventor: Asao Yamashita
  • Patent number: 7899637
    Abstract: The invention can provide a method of processing a substrate using Gate-Optimization processing sequences and evaluation libraries that can include gate-etch procedures, COR-etch procedures, and evaluation procedures.
    Type: Grant
    Filed: June 13, 2007
    Date of Patent: March 1, 2011
    Assignee: Tokyo Electron Limited
    Inventors: Asao Yamashita, Merritt Funk, Daniel Prager, Lee Chen, Radha Sundararajan
  • Patent number: 7894927
    Abstract: The invention provides a method of processing a wafer using multilayer processing sequences and Multi-Layer/Multi-Input/Multi-Output (MLMIMO) models and libraries that can include one or more measurement procedures, one or more Poly-Etch (P-E) sequences, and one or more metal-gate etch sequences. The MLMIMO process control uses dynamically interacting behavioral modeling between multiple layers and/or multiple process steps. The multiple layers and/or the multiple process steps can be associated with the creation of lines, trenches, vias, spacers, contacts, and gate structures that can be created using isotropic and/or anisotropic etch processes.
    Type: Grant
    Filed: August 6, 2008
    Date of Patent: February 22, 2011
    Assignee: Tokyo Electron Limited
    Inventors: Merritt Funk, Radha Sundararajan, Asao Yamashita, Daniel Prager, Hyung Joo Lee
  • Patent number: 7877161
    Abstract: A processing system and method for chemical oxide removal (COR) is presented, wherein the processing system comprises a first treatment chamber and a second treatment chamber, wherein the first and second treatment chambers are coupled to one another. The first treatment chamber comprises a chemical treatment chamber that provides a temperature controlled chamber, and an independently temperature controlled substrate holder for supporting a substrate for chemical treatment. The substrate is exposed to a gaseous chemistry, such as HF/NH3, under controlled conditions including surface temperature and gas pressure. The second treatment chamber comprises a heat treatment chamber that provides a temperature controlled chamber, thermally insulated from the chemical treatment chamber. The heat treatment chamber provides a substrate holder for controlling the temperature of the substrate to thermally process the chemically treated surfaces on the substrate.
    Type: Grant
    Filed: December 17, 2003
    Date of Patent: January 25, 2011
    Assignee: Tokyo Electron Limited
    Inventors: Masayuki Tomoyasu, Merritt Lane Funk, Kevin Augustine Pinto, Masaya Odagiri, Lemuel Chen, Asao Yamashita, Akira Iwami, Hiroyuki Takahashi
  • Publication number: 20100214545
    Abstract: The invention can provide apparatus and methods of creating metal gate structures on wafers in real-time using Lithography-Etch-Lithography-Etch (LELE) processing sequence. Real-time data and/or historical data associated with LELE processing sequences can be fed forward and/or fed back as fixed variables or constrained variables in internal-Integrated-Metrology modules (i-IMM) to improve the accuracy of the metal gate structures.
    Type: Application
    Filed: February 24, 2009
    Publication date: August 26, 2010
    Applicant: Tokyo Electron Limited
    Inventors: Merritt Funk, Daniel J. Prager, Asao Yamashita, Radha Sundararajan
  • Patent number: 7763404
    Abstract: The present invention provides methods and system for improving the accuracy of measurements made using optical metrology. The present invention relates to methods and systems for changing the optical properties of tunable resists that can be used in the production of electronic devices such as integrated circuits. Further, the invention provides methods and systems for using a modifiable resist layer that provides a first set of optical properties before exposure and a second set of optical properties after exposure.
    Type: Grant
    Filed: September 26, 2006
    Date of Patent: July 27, 2010
    Assignee: Tokyo Electron Limited
    Inventors: James E. Willis, Manuel Perez, Asao Yamashita
  • Patent number: 7765077
    Abstract: The invention can provide a method of processing a substrate using Spacer-Optimization (S-O) processing sequences and evaluation libraries that can include one or more optimized spacer creation and evaluation procedures. In addition, the S-O processing sequences can include one or more deposition procedures, one or more partial-etch procedures, one or more chemical oxide removal (COR)-etch procedures, one or more optimization procedures, one or more evaluation procedures, and/or one or more verification procedures.
    Type: Grant
    Filed: September 21, 2007
    Date of Patent: July 27, 2010
    Assignee: Tokyo Electron Limited
    Inventors: Asao Yamashita, Merritt Funk, Daniel J. Prager, Lee Chen, Radha Sundaranajan
  • Patent number: 7713758
    Abstract: The invention can provide a method of processing a substrate using Gate-Optimization processing sequences and evaluation libraries that can include gate-etch procedures, COR-etch procedures, and evaluation procedures.
    Type: Grant
    Filed: June 13, 2007
    Date of Patent: May 11, 2010
    Assignee: Tokyo Electon Limited
    Inventors: Asao Yamashita, Merritt Funk, Daniel Prager, Lee Chen, Radha Sundararajan
  • Publication number: 20100036514
    Abstract: The invention provides a method of processing a wafer using multilayer processing sequences and Multi-Layer/Multi-Input/Multi-Output (MLMIMO) models and libraries that can include one or more measurement procedures, one or more Poly-Etch (P-E) sequences, and one or more metal-gate etch sequences. The MLMIMO process control uses dynamically interacting behavioral modeling between multiple layers and/or multiple process steps. The multiple layers and/or the multiple process steps can be associated with the creation of lines, trenches, vias, spacers, contacts, and gate structures that can be created using isotropic and/or anisotropic etch processes.
    Type: Application
    Filed: August 6, 2008
    Publication date: February 11, 2010
    Applicant: TOKYO ELECTRON LIMITED
    Inventors: Merritt Funk, Radha Sundararajan, Asao Yamashita, Daniel Prager, Hyung Joo Lee