Patents by Inventor Yushin Takasawa

Yushin Takasawa 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: 8679989
    Abstract: A method of manufacturing a semiconductor device has: carrying a substrate into a process chamber; depositing a thin film on the substrate by supplying inside the process chamber a first film deposition gas including at least one element among plural elements forming a thin film to be deposited and capable of accumulating a film solely and a second film deposition gas including at least another element among the plural elements and incapable of accumulating a film solely; carrying the substrate on which is deposited the thin film out from inside the process chamber; and removing a first sediment adhering to an interior of the process chamber and a second sediment adhering to an interior of the supply portion and having a chemical composition different from a chemical composition of the first sediment by supplying cleaning gases inside the process chamber and inside a supply portion that supplies the first film deposition gas while changing at least one of a supply flow rate, a concentration, and a type betwee
    Type: Grant
    Filed: March 27, 2007
    Date of Patent: March 25, 2014
    Assignee: Hitachi Kokusai Electric Inc.
    Inventors: Sadao Nakashima, Takahiro Maeda, Kiyohiko Maeda, Kenji Kameda, Yushin Takasawa
  • Publication number: 20140024225
    Abstract: An insulating film having features such as a low dielectric constant, a low etching rate and a high insulating property is formed. An oxycarbonitride film is formed on a substrate by performing a cycle a predetermined number of times, the cycle including: (a) supplying a gas containing an element to the substrate; (b) supplying a carbon-containing gas to the substrate; (c) supplying a nitrogen-containing gas to the substrate; and (d) supplying an oxygen-containing gas to the substrate.
    Type: Application
    Filed: September 25, 2013
    Publication date: January 23, 2014
    Applicant: Hitachi Kokusai Electric Inc.
    Inventors: Yoshiro HIROSE, Yushin TAKASAWA, Tsukasa KAMAKURA, Yoshinobu NAKAMURA, Ryota SASAJIMA
  • Publication number: 20130337660
    Abstract: Provided: forming a specific element-containing layer by supplying a source gas to the substrate heated in a processing vessel, under a condition that a thermal decomposition reaction of the source gas is caused; changing the specific element-containing layer to a nitride layer by supplying a nitrogen-containing gas to the substrate; and changing the nitride layer to an oxynitride layer by supplying an oxygen-containing gas to the substrate, the source gas is sprayed in parallel to a surface of the substrate more strongly than a case of spraying the inert gas in parallel to the surface of the substrate in purging the inside of the processing vessel, by supplying an inert gas or a hydrogen-containing gas through the nozzle.
    Type: Application
    Filed: December 16, 2011
    Publication date: December 19, 2013
    Applicant: HITACHI KOKUSAI ELECTRIC INC.
    Inventors: Yosuke Ota, Yoshiro Hirose, Naonori Akae, Yushin Takasawa
  • Publication number: 20130273748
    Abstract: A method of manufacturing a semiconductor device is provided, including: forming an oxynitride film having a specific film thickness on a substrate by performing multiple numbers of times a cycle of: forming a specific element-containing layer on the substrate by supplying a source gas containing a specific element into a processing vessel in which the substrate is housed; changing the specific element-containing layer to a nitride layer by supplying a nitrogen-containing gas into the processing vessel; and changing the nitride layer to an oxynitride layer by supplying an oxygen-containing gas and an inert gas into the processing vessel, with this sequence as one cycle, wherein a composition ratio of the oxynitride film having the specific film thickness is controlled by controlling a partial pressure of the oxygen-containing gas in the processing vessel, in changing the nitride layer to the oxynitride layer.
    Type: Application
    Filed: November 1, 2011
    Publication date: October 17, 2013
    Applicant: HITACHI KOKUSAI ELECTRIC INC.
    Inventors: Ryota Sasajima, Yoshinobu Nakamura, Yushin Takasawa, Yoshiro Hirose
  • Patent number: 8546272
    Abstract: An insulating film having features such as a low dielectric constant, a low etching rate and a high insulating property is formed.
    Type: Grant
    Filed: April 8, 2011
    Date of Patent: October 1, 2013
    Assignee: Hitachi Kokusai Electric Inc.
    Inventors: Yoshiro Hirose, Yushin Takasawa, Tsukasa Kamakura, Yoshinobu Nakamura, Ryota Sasajima
  • Patent number: 8415258
    Abstract: Provided is a method of manufacturing a semiconductor device. The method includes: loading a substrate into a process vessel; performing a process to form an film on the substrate by alternately repeating: (a) forming a layer containing an element on the substrate by supplying at least two types of source gases into the process vessel, each of the at least two types of source gases containing the element, and (b) changing the layer containing the element by supplying reaction gas into the process vessel, the reaction gas being different from the at least two types of source gases; and unloading the processed substrate from the process vessel.
    Type: Grant
    Filed: November 1, 2011
    Date of Patent: April 9, 2013
    Assignee: Hitachi Kokusai Electric Inc.
    Inventors: Naonori Akae, Yoshiro Hirose, Yushin Takasawa, Yosuke Ota, Ryota Sasajima
  • Patent number: 8410003
    Abstract: A method of manufacturing a semiconductor device includes forming a layer containing a predetermined element on a substrate by supplying a source gas containing the predetermined element into a process vessel and exhausting the source gas from the process vessel to cause a chemical vapor deposition (CVD) reaction. A nitrogen-containing gas is supplied into the process vessel and then exhausted, changing the layer containing the predetermined element into a nitride layer. This process is repeated to form a nitride film on the substrate. The process vessel is purged by supplying an inert gas into the process vessel and exhausting the inert gas from the process vessel between forming the layer containing the predetermined element and changing the layer containing the predetermined element into the nitride layer.
    Type: Grant
    Filed: June 24, 2011
    Date of Patent: April 2, 2013
    Assignee: Hitachi Kokusai Electric Inc.
    Inventors: Yosuke Ota, Yoshiro Hirose, Naonari Akae, Yushin Takasawa
  • Patent number: 8409988
    Abstract: Provided are a method of manufacturing a semiconductor device and a substrate processing apparatus capable of improving defects of conventional CVD and ALD methods, satisfying requirements of film-thinning, and realizing high film-forming rate. The method includes forming a first layer including a first element being able to become solid state by itself on a substrate by supplying a gas containing the first element into a process vessel in which the substrate is accommodated under a condition that a CVD reaction occurs, and forming a second layer including the first element and a second element being unable to become solid state by itself by supplying a gas containing the second element into the process vessel to modify the first layer, wherein a cycle including the forming of the first layer and the forming of the second layer is performed at least once to form a thin film including the first and second elements and having a predetermined thickness.
    Type: Grant
    Filed: May 25, 2011
    Date of Patent: April 2, 2013
    Assignee: Hitachi Kokusai Electric Inc.
    Inventors: Yushin Takasawa, Hajime Karasawa, Yoshiro Hirose
  • Patent number: 8410001
    Abstract: An excellent type of a film is realized by modifying conventional types of films.
    Type: Grant
    Filed: March 14, 2011
    Date of Patent: April 2, 2013
    Assignee: Hitachi Kokusai Electric Inc.
    Inventors: Yushin Takasawa, Yoshiro Hirose, Tsukasa Kamakura, Yukinao Kaga
  • Publication number: 20130052836
    Abstract: There is provided a method for manufacturing a semiconductor device, including forming an insulating film having a prescribed composition and a prescribed film thickness on a substrate by alternately performing the following steps prescribed number of times: supplying one of the sources of a chlorosilane-based source and an aminosilane-based source to a substrate in a processing chamber, and thereafter supplying the other source, to form a first layer containing silicon, nitrogen, and carbon on the substrate; and supplying a reactive gas different from each of the sources, to the substrate in the processing chamber, to modify the first layer and form a second layer.
    Type: Application
    Filed: March 2, 2011
    Publication date: February 28, 2013
    Applicant: HITACHI KOKUSAI ELECTRIC INC.
    Inventors: Yoshiro Hirose, Kenji Kanayama, Norikazu Mizuno, Yushin Takasawa, Yosuke Ota
  • Patent number: 8367557
    Abstract: A method of manufacturing a semiconductor device, the method comprising: forming an oxide film on a substrate by alternately repeating: (a) forming an element-containing layer on the substrate by supplying a source gas containing an element into a process vessel accommodating the substrate; and (b) changing the element-containing layer to an oxide layer by supplying an oxygen-containing gas and a hydrogen-containing gas into the process vessel having an inside pressure lower than atmospheric pressure, reacting the oxygen-containing gas with the hydrogen-containing gas to generate oxidizing species containing oxygen, and oxidizing the element-containing layer by the oxidizing species; wherein the hydrogen-containing gas is supplied into the process vessel together with the source gas in step (a).
    Type: Grant
    Filed: October 28, 2009
    Date of Patent: February 5, 2013
    Assignee: Hitachi Kokosai Electric, Inc.
    Inventors: Naonori Akae, Yoshiro Hirose, Yushin Takasawa, Yosuke Ota
  • Publication number: 20120184110
    Abstract: An insulating film including characteristics such as low permittivity, a low etching rate and a high insulation property is formed. Supplying a gas containing an element, a carbon-containing gas and a nitrogen-containing gas to a heated substrate in a processing vessel to form a carbonitride layer including the element, and supplying the gas containing the element and an oxygen-containing gas to the heated substrate in the processing vessel to form an oxide layer including the element are alternately repeated to form on the substrate an oxycarbonitride film having the carbonitride layer and the oxide layer alternately stacked therein.
    Type: Application
    Filed: January 9, 2012
    Publication date: July 19, 2012
    Applicant: HITACHI KOKUSAI ELECTRIC INC.
    Inventors: Yoshiro Hirose, Yushin Takasawa, Tsukasa Kamakura, Yoshinobu Nakamura, Ryota Sasajima
  • Patent number: 8202809
    Abstract: A semiconductor device manufacturing method includes: forming a layer on a heated substrate by supplying source gas into a process vessel; changing the layer into an oxide layer by supplying gases containing oxygen and hydrogen to the heated substrate in the process vessel under a pressure lower than atmospheric pressure; and forming an oxide film on the heated substrate by alternately repeating the forming of the layer and the changing of the layer while purging an inside of the process vessel therebetween. In the forming of the layer, the source gas is supplied toward the substrate through a nozzle at a side of the substrate, and inert or hydrogen-containing gas is supplied together with the source gas through the nozzle toward the substrate, such that the velocity of the source gas flowing parallel to the substrate is greater than the velocity of the inert gas flowing parallel to the substrate in the purging of the process vessel.
    Type: Grant
    Filed: November 19, 2010
    Date of Patent: June 19, 2012
    Assignee: Hitachi Kokusai Electric Inc.
    Inventors: Yosuke Ota, Naonori Akae, Yushin Takasawa, Yoshiro Hirose
  • Publication number: 20120045905
    Abstract: Provided is a method of manufacturing a semiconductor device. The method includes: loading a substrate into a process vessel; performing a process to form an film on the substrate by alternately repeating: (a) forming a layer containing an element on the substrate by supplying at least two types of source gases into the process vessel, each of the at least two types of source gases containing the element, and (b) changing the layer containing the element by supplying reaction gas into the process vessel, the reaction gas being different from the at least two types of source gases; and unloading the processed substrate from the process vessel.
    Type: Application
    Filed: November 1, 2011
    Publication date: February 23, 2012
    Inventors: Naonori AKAE, Yoshiro Hirose, Yushin Takasawa, Yosuke Ota, Ryota Sasajima
  • Publication number: 20110318940
    Abstract: A method of manufacturing a semiconductor device includes forming a layer containing a predetermined element on a substrate by supplying a source gas containing the predetermined element into a process vessel and exhausting the source gas from the process vessel to cause a chemical vapor deposition (CVD) reaction. A nitrogen-containing gas is supplied into the process vessel and then exhausted, changing the layer containing the predetermined element into a nitride layer. This process is repeated to form a nitride film on the substrate. The process vessel is purged by supplying an inert gas into the process vessel and exhausting the inert gas from the process vessel between forming the layer containing the predetermined element and changing the layer containing the predetermined element into the nitride layer.
    Type: Application
    Filed: June 24, 2011
    Publication date: December 29, 2011
    Applicant: HITACHI KOKUSAI ELECTRIC INC.
    Inventors: Yosuke OTA, Yoshiro HIROSE, Naonori AKAE, Yushin TAKASAWA
  • Patent number: 8076251
    Abstract: Provided is a method of manufacturing a semiconductor device. The method includes: loading a substrate into a process vessel; performing a process to form an oxide, nitride, or oxynitride film on the substrate by alternately repeating: (a) forming a layer containing an element on the substrate by supplying and exhausting first and second source gases containing the element into and from the process vessel; and (b) changing the layer containing the element into an oxide, nitride, or oxynitride layer by supplying and exhausting reaction gas different from the first and second source gases into and from the process vessel; and unloading the substrate from the process vessel. The first source gas is more reactive than the second source gas, and an amount of the first source gas supplied into the process vessel is set to be less than that of the second source gas supplied into the process vessel.
    Type: Grant
    Filed: September 29, 2010
    Date of Patent: December 13, 2011
    Assignee: Hitachi Kokusai Electric, Inc.
    Inventors: Naonori Akae, Yoshiro Hirose, Yushin Takasawa, Yosuke Ota, Ryota Sasajima
  • Publication number: 20110294280
    Abstract: Provided are a method of manufacturing a semiconductor device and a substrate processing apparatus capable of improving defects of conventional CVD and ALD methods, satisfying requirements of film-thinning, and realizing high film-forming rate. The method includes forming a first layer including a first element being able to become solid state by itself on a substrate by supplying a gas containing the first element into a process vessel in which the substrate is accommodated under a condition that a CVD reaction occurs, and forming a second layer including the first element and a second element being unable to become solid state by itself by supplying a gas containing the second element into the process vessel to modify the first layer, wherein a cycle including the forming of the first layer and the forming of the second layer is performed at least once to form a thin film including the first and second elements and having a predetermined thickness.
    Type: Application
    Filed: May 25, 2011
    Publication date: December 1, 2011
    Applicant: Hitachi Kokusai Electric Inc.
    Inventors: Yushin TAKASAWA, Hajime KARASAWA, Yoshiro HIROSE
  • Publication number: 20110256733
    Abstract: An insulating film having features such as a low dielectric constant, a low etching rate and a high insulating property is formed.
    Type: Application
    Filed: April 8, 2011
    Publication date: October 20, 2011
    Applicant: HITACHI KOKUSAI ELECTRIC INC.
    Inventors: Yoshiro HIROSE, Yushin TAKASAWA, Tsukasa KAMAKURA, Yoshinobu NAKAMURA, Ryota SASAJIMA
  • Publication number: 20110230057
    Abstract: An excellent type of a film is realized by modifying conventional types of films.
    Type: Application
    Filed: March 14, 2011
    Publication date: September 22, 2011
    Applicant: HITACHI KOKUSAI ELECTRIC INC.
    Inventors: Yushin TAKASAWA, Yoshiro HIROSE, Tsukasa KAMAKURA, Yukinao KAGA
  • Publication number: 20110124204
    Abstract: A semiconductor device manufacturing method includes: forming a layer on a substrate by supplying source gas into a process vessel; changing the layer into an oxide layer by supplying gases containing oxygen and hydrogen into the process vessel heated and kept lower than atmospheric pressure; and forming an oxide film on the substrate by alternately repeating the forming of the layer and the changing of the layer while purging an inside of the process vessel therebetween. In the forming of the layer, the source gas is supplied toward the substrate through a nozzle at a side of the substrate, and inert or hydrogen-containing gas is supplied together with the source gas through the nozzle toward the substrate, such that the velocity of the source gas flowing parallel to the substrate is greater than the velocity of the inert gas flowing parallel to the substrate in the purging of the process vessel.
    Type: Application
    Filed: November 19, 2010
    Publication date: May 26, 2011
    Applicant: Hitachi-Kokusai Electric Inc.
    Inventors: Yosuke Ota, Naonori Akae, Yushin Takasawa, Yoshiro Hirose