Patents by Inventor Seiichi Tagawa

Seiichi Tagawa 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: 11796919
    Abstract: A resist pattern formation method includes: forming on a substrate a resist layer containing a base resin, a sensitizer precursor, an acid generator, a base generator, and a base; generating a sensitizer from the sensitizer precursor; generating an acid from the acid generator and a base from the base generator; performing heat treatment on the resist layer after flood exposure; and developing the resist layer after the heat treatment. A ratio (C1=A1/B1) of a value (A1) representing an acid in pattern exposure to a value (B1) representing a base in the pattern exposure satisfies a relationship 0.9×C1<C2<10×C1 relative to a ratio (C2=A2/B2) of a value (A2) representing an acid in flood exposure to a value (B2) representing a base in the flood exposure.
    Type: Grant
    Filed: June 14, 2019
    Date of Patent: October 24, 2023
    Assignee: OSAKA UNIVERSITY
    Inventor: Seiichi Tagawa
  • Publication number: 20230258503
    Abstract: A temperature distribution learning apparatus learns a temperature distribution including a temperature at at least a first point in air of a target space. The temperature distribution learning apparatus includes a learning model. The learning model learns the temperature distribution, which is an objective variable, and a thermal image, which is an explanatory variable and is related to the target space, in association with each other. The learning model learns based training data including the temperature distribution and the thermal image.
    Type: Application
    Filed: June 30, 2021
    Publication date: August 17, 2023
    Inventors: Tomio ECHIGO, Seiichi TAGAWA
  • Patent number: 11187984
    Abstract: A resist patterning method includes a resist layer forming step, a patterned exposure step, a flood exposure step, and a developing step. In the resist layer forming step, a resist layer is formed on a substrate. In the patterned exposure step, a sensitizer is produced from a sensitizer precursor in the resist layer. In the flood exposure step, flood exposure is performed on the resist layer in which the sensitizer has been produced to produce an acid from a strong acid generator. In the developing step, the resist layer is developed. The patterned exposure step includes: producing a strong acid from the strong acid generator; producing the sensitizer through a reaction between the strong acid and the sensitizer precursor; producing a weak acid through a reaction between the strong acid and a base; and producing the sensitizer through a reaction between the weak acid and the sensitizer precursor.
    Type: Grant
    Filed: November 25, 2016
    Date of Patent: November 30, 2021
    Assignee: OSAKA UNIVERSITY
    Inventor: Seiichi Tagawa
  • Publication number: 20210216016
    Abstract: A resist pattern formation method includes: forming on a substrate a resist layer containing a base resin, a sensitizer precursor, an acid generator, a base generator, and a base; generating a sensitizer from the sensitizer precursor; generating an acid from the acid generator and a base from the base generator; performing heat treatment on the resist layer after flood exposure; and developing the resist layer after the heat treatment. A ratio (C1=A1/B1) of a value (A1) representing an acid in pattern exposure to a value (B1) representing a base in the pattern exposure satisfies a relationship 0.9×C1<C2<10×Cl relative to a ratio (C2=A2/B2) of a value (A2) representing an acid in flood exposure to a value (B2) representing a base in the flood exposure.
    Type: Application
    Filed: June 14, 2019
    Publication date: July 15, 2021
    Applicant: OSAKA UNIVERSITY
    Inventor: Seiichi TAGAWA
  • Patent number: 10670967
    Abstract: A resist patterning method according to the present invention includes: a resist layer forming step S101 of forming a resist layer (12) on a substrate (11); an activating step S103 of activating the resist layer by irradiation with an activating energy beam; a decay inhibiting step S105 of inhibiting decay of the activity of the resist layer; a latent pattern image forming step S107 of forming a latent pattern image in the activated resist layer by irradiation with a latent image forming energy beam; and a developing step S110 of developing the resist layer.
    Type: Grant
    Filed: April 18, 2018
    Date of Patent: June 2, 2020
    Assignee: OSAKA UNIVERSITY
    Inventors: Seiichi Tagawa, Akihiro Oshima
  • Patent number: 10429745
    Abstract: Methods and systems for PS-CAR photoresist simulation are described. In an embodiment, a method includes determining by simulation at least one process parameter of a lithography process using a radiation-sensitive material. In such an embodiment, the radiation-sensitive material includes: a first light wavelength activation threshold that controls the generation of acid to a first acid concentration in the radiation-sensitive material and controls generation of photosensitizer molecules in the radiation-sensitive material, and a second light wavelength activation threshold that can excite the photosensitizer molecules in the radiation-sensitive material that results in the acid comprising a second acid concentration that is greater than the first acid concentration, the second light wavelength being different from the first light wavelength. In such an embodiment, the method also includes performing a lithography process using the previously-determined at least one process parameter.
    Type: Grant
    Filed: February 19, 2016
    Date of Patent: October 1, 2019
    Assignees: Osaka University, Tokyo Electron Limited
    Inventors: Michael Carcasi, Benjamen M. Rathsack, Mark H. Somervell, Wallace P. Printz, Seiji Nagahara, Seiichi Tagawa
  • Publication number: 20180356731
    Abstract: A resist patterning method includes a resist layer forming step, a patterned exposure step, a flood exposure step, and a developing step. In the resist layer forming step, a resist layer is formed on a substrate. In the patterned exposure step, a sensitizer is produced from a sensitizer precursor in the resist layer. In the flood exposure step, flood exposure is performed on the resist layer in which the sensitizer has been produced to produce an acid from a strong acid generator. In the developing step, the resist layer is developed. The patterned exposure step includes: producing a strong acid from the strong acid generator; producing the sensitizer through a reaction between the strong acid and the sensitizer precursor; producing a weak acid through a reaction between the strong acid and a base; and producing the sensitizer through a reaction between the weak acid and the sensitizer precursor.
    Type: Application
    Filed: November 25, 2016
    Publication date: December 13, 2018
    Applicant: OSAKA UNIVERSITY
    Inventor: Seiichi TAGAWA
  • Patent number: 10073349
    Abstract: A pattern-forming method comprises patternwise exposing a predetermined region of a resist material film made from a photosensitive resin composition comprising a chemically amplified resist material to a first radioactive ray that is ionizing radiation or nonionizing radiation having a wavelength of no greater than 400 nm. The resist material film patternwise exposed is floodwise exposed to a second radioactive ray that is nonionizing radiation having a wavelength greater than the wavelength of the nonionizing radiation for the patternwise exposing and greater than 200 nm. The chemically amplified resist material comprises a base component, and a generative component that is capable of generating a radiation-sensitive sensitizer and an acid upon an exposure. The generative component comprises a radiation-sensitive sensitizer generating agent. The radiation-sensitive sensitizer generating agent comprises a compound represented by formula (A).
    Type: Grant
    Filed: August 19, 2016
    Date of Patent: September 11, 2018
    Assignees: OSAKA UNIVERSITY, TOKYO ELECTRON LIMITED, JSR CORPORATION
    Inventors: Hisashi Nakagawa, Takehiko Naruoka, Tomoki Nagai, Seiichi Tagawa, Akihiro Oshima, Seiji Nagahara
  • Patent number: 10073348
    Abstract: A resist-pattern-forming method comprises: patternwise exposing a predetermined region of a resist material film to a first radioactive ray that is ionizing radiation or nonionizing radiation; floodwise exposing the resist material film to a second radioactive ray that is nonionizing radiation; baking the resist material film; and developing the resist material film to form a resist pattern. The resist material film is made from a photosensitive resin composition comprising a chemically amplified resist material. The chemically amplified resist material comprises a base component that is capable of being made soluble or insoluble in a developer solution by an action of an acid and a generative component that is capable of generating a radiation-sensitive sensitizer and an acid upon an exposure. A van der Waals volume of the acid generated from the generative component is no less than 3.0×10?28 m3.
    Type: Grant
    Filed: August 19, 2016
    Date of Patent: September 11, 2018
    Assignees: OSAKA UNIVERSITY, TOKYO ELECTRON LIMITED, JSR CORPORATION
    Inventors: Hisashi Nakagawa, Takehiko Naruoka, Tomoki Nagai, Seiichi Tagawa, Akihiro Oshima, Seiji Nagahara
  • Publication number: 20180231892
    Abstract: A resist patterning method according to the present invention includes: a resist layer forming step S101 of forming a resist layer (12) on a substrate (11); an activating step S103 of activating the resist layer by irradiation with an activating energy beam; a decay inhibiting step S105 of inhibiting decay of the activity of the resist layer; a latent pattern image forming step S107 of forming a latent pattern image in the activated resist layer by irradiation with a latent image forming energy beam; and a developing step S110 of developing the resist layer.
    Type: Application
    Filed: April 18, 2018
    Publication date: August 16, 2018
    Applicant: OSAKA UNIVERSITY
    Inventors: Seiichi TAGAWA, Akihiro OSHIMA
  • Patent number: 10025190
    Abstract: A substrate treatment system for treating a substrate, includes: a treatment station in which a plurality of treatment apparatuses which treat the substrate are provided; an interface station which directly or indirectly delivers the substrate between an exposure apparatus which is provided outside the substrate treatment system and performs exposure of patterns on a resist film on the substrate, and the substrate treatment system; a light irradiation apparatus which performs post-exposure using UV light on the resist film on the substrate after the exposure of patterns is performed; and a post-exposure station which houses the light irradiation apparatus and is adjustable to a reduced pressure or inert gas atmosphere, wherein the post-exposure station is connected to the exposure apparatus directly or indirectly via a space which is adjustable to a reduced pressure or inert gas atmosphere.
    Type: Grant
    Filed: December 15, 2014
    Date of Patent: July 17, 2018
    Assignees: TOKYO ELECTRON LIMITED, OSAKA UNIVERSITY
    Inventors: Seiji Nagahara, Gousuke Shiraishi, Satoru Shimura, Kousuke Yoshihara, Shinichiro Kawakami, Masaru Tomono, Seiichi Tagawa, Akihiro Oshima
  • Patent number: 10025187
    Abstract: A photosensitization chemical-amplification type resist material according to the present invention is used for a two-stage exposure lithography process, and contains (1) a developable base component and (2) a component generating a photosensitizer and an acid through exposure. Among three components consisting of (a) an acid-photosensitizer generator, (b) a photosensitizer precursor, and (c) a photoacid generator, the above component contains only the component (a), any two components, or all of the components (a) to (c).
    Type: Grant
    Filed: February 17, 2015
    Date of Patent: July 17, 2018
    Assignees: TOKYO ELECTRON LIMITED, OSAKA UNIVERSITY
    Inventors: Seiji Nagahara, Seiichi Tagawa, Akihiro Oshima
  • Patent number: 9977332
    Abstract: A resist patterning method according to the present invention includes: a resist layer forming step S101 of forming a resist layer 12 on a substrate 11; an activating step S103 of activating the resist layer by irradiation with an activating energy beam; a decay inhibiting step S105 of inhibiting decay of the activity of the resist layer; a latent pattern image forming step S107 of forming a latent pattern image in the activated resist layer by irradiation with a latent image forming energy beam; and a developing step S110 of developing the resist layer.
    Type: Grant
    Filed: February 20, 2014
    Date of Patent: May 22, 2018
    Assignee: OSAKA UNIVERSITY
    Inventors: Seiichi Tagawa, Akihiro Oshima
  • Patent number: 9971247
    Abstract: A pattern-forming method comprises applying a chemically amplified resist material on an antireflective film formed on a substrate to form a resist material film. The resist material film is patternwise exposed to ionizing radiation or nonionizing radiation having a wavelength of no greater than 400 nm. The resist material film patternwise exposed is floodwise exposed to nonionizing radiation having a wavelength greater than the nonionizing radiation for the patternwise exposing and greater than 200 nm. The resist material film floodwise exposed is baked. The resist material film baked is developed with a developer solution. An extinction coefficient of the antireflective film for the nonionizing radiation employed for the floodwise exposing is no less than 0.1. The chemically amplified resist material comprises a base component and a generative component that is capable of generating a radiation-sensitive sensitizer and an acid upon an exposure.
    Type: Grant
    Filed: August 19, 2016
    Date of Patent: May 15, 2018
    Assignees: OSAKA UNIVERSITY, TOKYO ELECTRON LIMITED, JSR CORPORATION
    Inventors: Hisashi Nakagawa, Takehiko Naruoka, Tomoki Nagai, Seiichi Tagawa, Akihiro Oshima, Seiji Nagahara
  • Publication number: 20170242342
    Abstract: Methods and systems for PS-CAR photoresist simulation are described. In an embodiment, a method includes determining by simulation at least one process parameter of a lithography process using a radiation-sensitive material. In such an embodiment, the radiation-sensitive material includes: a first light wavelength activation threshold that controls the generation of acid to a first acid concentration in the radiation-sensitive material and controls generation of photosensitizer molecules in the radiation-sensitive material, and a second light wavelength activation threshold that can excite the photosensitizer molecules in the radiation-sensitive material that results in the acid comprising a second acid concentration that is greater than the first acid concentration, the second light wavelength being different from the first light wavelength. In such an embodiment, the method also includes performing a lithography process using the previously-determined at least one process parameter.
    Type: Application
    Filed: February 19, 2016
    Publication date: August 24, 2017
    Inventors: Michael Carcasi, Benjamen M. Rathsack, Mark H. Somervell, Wallace P. Printz, Seiji Nagahara, Seiichi Tagawa
  • Publication number: 20170097570
    Abstract: A resist patterning method according to the present invention includes a resist layer forming step, a patterned exposure step, a flood exposure step, and a developing step. In the resist layer forming step, a resist layer containing a base resin, a sensitizer precursor, an acid generator, and a base generator is formed on a substrate. In the patterned exposure step, patterned exposure is performed on the resist layer to produce a sensitizer from the sensitizer precursor. In the flood exposure step, flood exposure is performed on the resist layer in which the sensitizer has been produced to produce an acid from the acid generator and produce a base from the base generator after the patterned exposure. In the developing step, the resist layer is developed after the flood exposure.
    Type: Application
    Filed: May 21, 2015
    Publication date: April 6, 2017
    Applicant: OSAKA UNIVERSITY
    Inventor: Seiichi TAGAWA
  • Publication number: 20170052450
    Abstract: A pattern-forming method comprises applying a chemically amplified resist material on an antireflective film formed on a substrate to form a resist material film. The resist material film is patternwise exposed to ionizing radiation or nonionizing radiation having a wavelength of no greater than 400 nm. The resist material film patternwise exposed is floodwise exposed to nonionizing radiation having a wavelength greater than the nonionizing radiation for the patternwise exposing and greater than 200 nm. The resist material film floodwise exposed is baked. The resist material film baked is developed with a developer solution. An extinction coefficient of the antireflective film for the nonionizing radiation employed for the floodwise exposing is no less than 0.1. The chemically amplified resist material comprises a base component and a generative component that is capable of generating a radiation-sensitive sensitizer and an acid upon an exposure.
    Type: Application
    Filed: August 19, 2016
    Publication date: February 23, 2017
    Applicants: OSAKA UNIVERSITY, TOKYO ELECTRON LIMITED
    Inventors: Hisashi NAKAGAWA, Takehiko NARUOKA, Tomoki NAGAI, Seiichi TAGAWA, Akihiro OSHIMA, Seiji NAGAHARA
  • Publication number: 20170052448
    Abstract: A resist-pattern-forming method comprises: patternwise exposing a predetermined region of a resist material film to a first radioactive ray that is ionizing radiation or nonionizing radiation; floodwise exposing the resist material film to a second radioactive ray that is nonionizing radiation; baking the resist material film; and developing the resist material film to form a resist pattern. The resist material film is made from a photosensitive resin composition comprising a chemically amplified resist material. The chemically amplified resist material comprises a base component that is capable of being made soluble or insoluble in a developer solution by an action of an acid and a generative component that is capable of generating a radiation-sensitive sensitizer and an acid upon an exposure. A van der Waals volume of the acid generated from the generative component is no less than 3.0×10?28 m3.
    Type: Application
    Filed: August 19, 2016
    Publication date: February 23, 2017
    Applicants: OSAKA UNIVERSITY, TOKYO ELECTRON LIMITED
    Inventors: Hisashi NAKAGAWA, Takehiko Naruoka, Tomoki Nagai, Seiichi Tagawa, Akihiro Oshima, Seiji Nagahara
  • Publication number: 20170052449
    Abstract: A pattern-forming method comprises patternwise exposing a predetermined region of a resist material film made from a photosensitive resin composition comprising a chemically amplified resist material to a first radioactive ray that is ionizing radiation or nonionizing radiation having a wavelength of no greater than 400 nm. The resist material film patternwise exposed is floodwise exposed to a second radioactive ray that is nonionizing radiation having a wavelength greater than the wavelength of the nonionizing radiation for the patternwise exposing and greater than 200 nm. The chemically amplified resist material comprises a base component, and a generative component that is capable of generating a radiation-sensitive sensitizer and an acid upon an exposure. The generative component comprises a radiation-sensitive sensitizer generating agent. The radiation-sensitive sensitizer generating agent comprises a compound represented by formula (A).
    Type: Application
    Filed: August 19, 2016
    Publication date: February 23, 2017
    Applicants: OSAKA UNIVERSITY, TOKYO ELECTRON LIMITED
    Inventors: HISASHI NAKAGAWA, TAKEHIKO NARUOKA, TOMOKI NAGAI, SEIICHI TAGAWA, AKIHIRO OSHIMA, SEIJI NAGAHARA
  • Publication number: 20170031245
    Abstract: A substrate treatment system for treating a substrate, includes: a treatment station in which a plurality of treatment apparatuses which treat the substrate are provided; an interface station which directly or indirectly delivers the substrate between an exposure apparatus which is provided outside the substrate treatment system and performs exposure of patterns on a resist film on the substrate, and the substrate treatment system; a light irradiation apparatus which performs post-exposure using UV light on the resist film on the substrate after the exposure of patterns is performed; and a post-exposure station which houses the light irradiation apparatus and is adjustable to a reduced pressure or inert gas atmosphere, wherein the post-exposure station is connected to the exposure apparatus directly or indirectly via a space which is adjustable to a reduced pressure or inert gas atmosphere.
    Type: Application
    Filed: December 15, 2014
    Publication date: February 2, 2017
    Applicants: TOKYO ELECTRON LIMITED, OSAKA UNIVERSITY
    Inventors: Seiji NAGAHARA, Gousuke SHIRAISHI, Satoru SHIMURA, Kousuke YOSHIHARA, Shinichiro KAWAKAMI, Masaru TOMONO, Seiichi TAGAWA, Akihiro OSHIMA