Patents by Inventor Kazuhiko Yamazaki

Kazuhiko Yamazaki 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: 20210183670
    Abstract: Described herein is a technique capable of efficiently removing a foreign substance in a reaction tube. According to one aspect of the technique, there is provided a substrate processing apparatus including: a reaction tube in which a substrate is processed; and a substrate retainer including a plurality of support columns configured to support the substrate, wherein at least one among the plurality of the support columns includes: a hollow portion through which an inert gas is supplied; and a gas supply port through which the inert gas is supplied toward an inner wall of the reaction tube.
    Type: Application
    Filed: March 1, 2021
    Publication date: June 17, 2021
    Applicant: KOKUSAI ELECTRIC CORPORATION
    Inventors: Daisuke HARA, Takashi YAHATA, Tsuyoshi TAKEDA, Kenji ONO, Kazuhiko YAMAZAKI
  • Publication number: 20210140007
    Abstract: Provided is a high-strength hot rolled steel sheet that has excellent stretch flange formability, bendability, and low-temperature toughness while maintaining high strength of a tensile strength TS of 1180 MPa or more, and a method for manufacturing the high-strength hot rolled steel sheet. The high-strength hot rolled steel sheet includes a specific chemical composition, and a steel structure in which a lower bainite phase and/or a tempered martensite phase at 90% or more in terms of a total area fraction is contained as a dominant phase, an average grain size of the dominant phase is 10.0 ?m or less, and an amount of Fe in Fe-based precipitates is 0.70% or less in mass %, in which an arithmetic average roughness (Ra) of a surface is 2.50 ?m or less, and a tensile strength TS is 1180 MPa or more.
    Type: Application
    Filed: June 10, 2019
    Publication date: May 13, 2021
    Applicant: JFE Steel Corporation
    Inventors: Kazuhiko Yamazaki, Takeshi Yokota, Sumio Kaiho, Noriaki Moriyasu
  • Publication number: 20210129491
    Abstract: Provided is a high-strength hot-rolled coated steel sheet with excellent formability, A high-strength hot-rolled coated steel sheet has a constituent composition containing, in a mass percent, C: 0.03% to 0.15%, Si: 0.4% or less, Mn: 1.2% to 1.9%, Ti: 0.05% to 0.25%, B: 0.0005% to 0.0050%, P: 0.03% or less, S: 0.005% or less, Al: 0.005% to 0.4%, and N: 0.01% or less, the balance being Fe and incidental impurities. The total area fraction of one or more of ferrite and tempered bainite is 90% or more. The steel sheet has a structure in which the volume fraction of Ti carbides having particle sizes of 20 nm or less is 0.05 vol % or more.
    Type: Application
    Filed: February 26, 2018
    Publication date: May 6, 2021
    Applicant: JFE Steel Corporation
    Inventors: Sota Goto, Kazuhiko Yamazaki, Taro Kizu, Shunsuke Toyoda
  • Publication number: 20200399757
    Abstract: According to one aspect of the technique, there is provided a substrate processing apparatus including: a process chamber in which a substrate is processed; a first gas supply system configured to supply a first gas onto the substrate in the process chamber and including a plurality of tanks configured to store the first gas, wherein the first gas is heated in the plurality of the tanks; and a controller configured to control the first gas supply system such that the first gas is supplied onto the substrate in the process chamber while switching among the plurality of the tanks.
    Type: Application
    Filed: September 4, 2020
    Publication date: December 24, 2020
    Inventors: Daisuke HARA, Takashi YAHATA, Kenji SHINOZAKI, Kazuhiko YAMAZAKI
  • Publication number: 20200399759
    Abstract: There is provided a technique that includes: process chamber processing substrate; gas supply system supplying precursor gas into the process chamber; exhaust pipe connected to vacuum pump and evacuating inside of the process chamber; gas concentration sensor configured to measure concentration of the precursor gas passing through the exhaust pipe at front stage of the vacuum pump; a pressure sensor measuring pressure in the exhaust pipe at rear stage of the vacuum pump; dilution gas supply system supplying dilution gas into the vacuum pump or the exhaust pipe at the front stage; and a controller controlling the dilution gas supply system to supply the dilution gas into the vacuum pump or the exhaust pipe at the front stage at low rate corresponding to the measured concentration of the precursor gas and the measured pressure in the exhaust pipe at the rear stage.
    Type: Application
    Filed: September 8, 2020
    Publication date: December 24, 2020
    Applicant: KOKUSAI ELECTRIC CORPORATION
    Inventors: Kazuhiko YAMAZAKI, Takashi YAHATA, Daisuke HARA, Kenji SHINOZAKI
  • Publication number: 20200312632
    Abstract: There is provided a technique that includes: a reaction tube configured to process a plurality of substrates; a substrate support configured to support the plurality of substrates stacked in multiple stages; a buffer chamber that is at least located at a position of height from a lowermost substrate to an uppermost substrate supported by the substrate support, and is installed along an inner wall of the reaction tube; and an electrode for plasma generation that is inserted from a lower portion of the buffer chamber into an upper portion of the buffer chamber through a side surface of the reaction tube, the electrode being configured to activate the processing gas by plasma inside the buffer chamber thereby applying high-frequency power to the electrode by a power supply.
    Type: Application
    Filed: March 11, 2020
    Publication date: October 1, 2020
    Applicant: KOKUSAI ELECTRIC CORPORATION
    Inventors: Daisuke HARA, Takashi YAHATA, Tsuyoshi TAKEDA, Kenji ONO, Kazuhiko YAMAZAKI
  • Publication number: 20200063227
    Abstract: There are provided a high-strength hot-rolled steel sheet having a tensile strength of 980 MPa or more and a production method therefor. The high-strength hot-rolled steel sheet has a predetermined component composition and a microstructure containing 75.0% or more by area and less than 97.0% by area of a primary phase composed of an upper bainite phase, the primary phase having an average grain size of 12.0 ?m or less, and more than 3.0% by area and 25.0% or less by area of a secondary phase that is a structure composed of one or two of a lower bainite phase and/or a tempered martensite phase, and a martensite phase, in which the number density of grains of the secondary phase having an equivalent circular diameter of 0.5 ?m or more is 150,000 grains/mm2 or less, and the steel sheet has an arithmetic mean surface roughness of 2.00 ?m or less.
    Type: Application
    Filed: February 6, 2018
    Publication date: February 27, 2020
    Applicant: JFE Steel Corporation
    Inventors: Kazuhiko Yamazaki, Shunsuke Toyoda, Noriaki Moriyasu, Sumio Kaiho
  • Patent number: 10301693
    Abstract: A steel slab having a composition containing C: more than 0.07% and 0.2% or less, Si: 2.0% or less, Mn: 1.0% to 3.0%, Al: 0.1% or less, Ti: 0.05% to 0.3%, and V: 0.05% to 0.3% on a mass percent basis is heated to 1100° C. or more and is subjected to rough rolling and finish rolling. In the finish rolling, the total rolling reduction of two final passes is 30% or more, and the finish rolling temperature ranges from (Ar3 transformation temperature) to (Ar3 transformation temperature+120° C.). Cooling is started within 2 seconds after the finish rolling. Coiling is performed at an average cooling rate of 40° C./s or more at a coiling temperature in the range of 300° C. to 500° C. The resulting high-strength hot-rolled steel sheet has a microstructure in which a bainite phase constitutes more than 90% by volume, the average lath interval of bainite is 0.
    Type: Grant
    Filed: May 2, 2016
    Date of Patent: May 28, 2019
    Assignee: JFE Steel Corporation
    Inventors: Katsumi Nakajima, Kazuhiko Yamazaki, Chikara Kami
  • Publication number: 20180237874
    Abstract: A high-strength hot-rolled steel sheet that has excellent punching workability and hole expandability, and a method for manufacturing the same. The hot-rolled steel sheet has a tensile strength of 980 MPa or more. The hot-rolled steel sheet has a chemical composition containing C, Si, Mn, P, S, Al, N, Ti, Cr, and B, and has a microstructure including a bainite phase having an area ratio of 85% or more as a main phase, and a martensite phase or martensite-austenite constituent having an area ratio of 15% or less as a second phase, the balance being a ferrite phase. The second phase has an average grain diameter of 3.0 ?m or less, prior-austenite grains have an average aspect ratio of 1.3 or more and 5.0 or less, and recrystallized prior-austenite grains have an area ratio of 15% or less relative to non-recrystallized prior-austenite grains.
    Type: Application
    Filed: July 20, 2016
    Publication date: August 23, 2018
    Applicant: JFE STEEL CORPORATION
    Inventors: Kazuhiko YAMAZAKI, Shunsuke TOYODA, Noriaki MORIYASU, Kentaro IRISA
  • Patent number: 9845175
    Abstract: A polylactic acid formed body including a polylactic acid base material (1) and a hydrocarbon film (3) vapor-deposited on the surface of the base material by a plasma CVD method. The polylactic acid base material (1) exhibits a sharp X-ray diffraction peak in which a half-width of peak appearing in the 10°-25° wide angle X-ray measurement is not more than 1.22°, and the hydrocarbon film (3) is vapor-deposited on the surface of the polylactic acid base material (1), and includes two layers of a high CH2 layer (3a) having a ratio of CH2 per the total of CH, CH2 and CH3 of not less than 40% and a low CH2 layer (3b) formed on the high CH2 layer (3a) and having a ratio of CH2 per the total of CH, CH2 and CH3 of not more than 35%.
    Type: Grant
    Filed: February 4, 2013
    Date of Patent: December 19, 2017
    Assignee: TOYO SEIKAN GROUP HOLDINGS, LTD.
    Inventors: Takuro Ito, Satomi Ozawa, Satoru Kito, Kazuhiko Yamazaki
  • Patent number: 9752216
    Abstract: A high-strength hot rolled steel sheet with excellent bendability and low-temperature toughness includes a chemical composition including, in mass %, C: 0.08 to 0.25%, Si: 0.01 to 1.0%, Mn: 0.8 to 2.1%, P: not more than 0.025%, S: not more than 0.005% and Al: 0.005 to 0.10%, the balance including Fe and inevitable impurities, and a microstructure having a bainite phase and/or a tempered martensite phase as a main phase, the average grain diameter of prior austenite grains being not more than 20 ?m as measured with respect to a cross section parallel to a rolling direction and not more than 15 ?m as measured with respect to a cross section perpendicular to the rolling direction.
    Type: Grant
    Filed: October 31, 2012
    Date of Patent: September 5, 2017
    Assignee: JFE Steel Corporation
    Inventors: Chikara Kami, Kazuhiko Yamazaki
  • Publication number: 20160258032
    Abstract: A steel slab having a composition containing C: more than 0.07% and 0.2% or less, Si: 2.0% or less, Mn: 1.0% to 3.0%, Al: 0.1% or less, Ti: 0.05% to 0.3%, and V: 0.05% to 0.3% on a mass percent basis is heated to 1100° C. or more and is subjected to rough rolling and finish rolling. In the finish rolling, the total rolling reduction of two final passes is 30% or more, and the finish rolling temperature ranges from (Ar3 transformation temperature) to (Ar3 transformation temperature+120° C.). Cooling is started within 2 seconds after the finish rolling. Coiling is performed at an average cooling rate of 40° C./s or more at a coiling temperature in the range of 300° C. to 500° C. The resulting high-strength hot-rolled steel sheet has a microstructure in which a bainite phase constitutes more than 90% by volume, the average lath interval of bainite is 0.
    Type: Application
    Filed: May 2, 2016
    Publication date: September 8, 2016
    Applicant: JFE Steel Corporation
    Inventors: Katsumi Nakajima, Kazuhiko Yamazaki, Chikara Kami
  • Patent number: 9423184
    Abstract: A corrugated-fin heat exchanger is constructed by arranging a plurality of flat heat exchange tubes parallel to each other in a horizontal direction between a pair of opposing header pipes, joining, at a position between the plurality of flat heat exchange tubes, corrugated fins formed by alternately repeating peak folding and valley folding portions, and forming water flow passages from lug pieces that are obtained by obliquely cutting and raising flange portions extending along end portions of each of the plurality of flat heat exchange tubes (3) in a width direction thereof. A pitch (P) of each of the corrugated fins between a peak and a valley thereof, a width (L) of each of the lug pieces in a vertical direction thereof, and a thickness (T) of the each of the plurality of flat heat exchange tubes have a relationship of P×2?L?T.
    Type: Grant
    Filed: April 2, 2012
    Date of Patent: August 23, 2016
    Assignee: NIPPON LIGHT METAL COMPANY, LTD.
    Inventors: Takeshi Yoshida, Kazuhiko Yamazaki
  • Patent number: 9328975
    Abstract: A drain structure for a corrugated fin-type heat exchanger, the corrugated fin-type heat exchanger being constituted by arranging a plurality of flat heat exchange tubes parallel to one another in a horizontal direction between a pair of opposing header pipes, and joining corrugated fins between the plurality of flat heat exchange tubes, the drain structure including a plurality of water flow passages for inducing water retained between the corrugated fins adjacent to an upper side and a lower side of each of the plurality of flat heat exchange tubes, the plurality of water flow passages being formed on an outer end surface of the each of the plurality of flat heat exchange tubes in a width direction thereof at a pitch along a longitudinal direction of the each of the plurality of flat heat exchange tubes.
    Type: Grant
    Filed: March 8, 2010
    Date of Patent: May 3, 2016
    Assignees: NIPPON LIGHT METAL COMPANY, LTD., SHARP KABUSHIKI KAISHA
    Inventors: Masayuki Furumaki, Takeshi Yoshida, Kazuhiko Yamazaki
  • Publication number: 20160076124
    Abstract: A high strength hot rolled steel sheet having a tensile strength TS of 980 MPa or more, has a composition containing, on a percent by mass basis, C: 0.05% or more and 0.18% or less, Si: 1.0% or less, Mn: 1.0% or more and 3.5% or less, P: 0.04% or less, S: 0.006% or less, Al: 0.10% or less, N: 0.008% or less, Ti: 0.05% or more and 0.20% or less, V: more than 0.1% and 0.3% or less, and the balance being Fe and incidental impurities, and has a microstructure including a primary phase and a secondary phase, the primary phase being a bainite phase having an area fraction of more than 85%, the secondary phase being at least one of ferrite phase, martensite phase, and retained austenite phase, the secondary phase having an area fraction of 0% or more and less than 15% in total, the bainite phase having an average lath interval of laths of 400 nm or less, and the laths having an average long axis length of 5.0 ?m or less.
    Type: Application
    Filed: March 17, 2014
    Publication date: March 17, 2016
    Applicant: JFE STEEL CORPORATION
    Inventors: Kazuhiko Yamazaki, Katsumi Nakajima, Chikara Kami
  • Publication number: 20160068937
    Abstract: A steel slab having a composition containing C: more than 0.07% and 0.2% or less, Si: 2.0% or less, Mn: 1.0% to 3.0%, Al: 0.1% or less, Ti: 0.05% to 0.3%, and V: 0.05% to 0.3% on a mass percent basis is heated to 1100° C. or more and is subjected to rough rolling and finish rolling. In the finish rolling, the total rolling reduction of two final passes is 30% or more, and the finish rolling temperature ranges from (Ar3 transformation temperature) to (Ar3 transformation temperature+120° C.). Cooling is started within 2 seconds after the finish rolling. Coiling is performed at an average cooling rate of 40° C./s or more at a coiling temperature in the range of 300° C. to 500° C. The resulting high-strength hot-rolled steel sheet has a microstructure in which a bainite phase constitutes more than 90% by volume, the average lath interval of bainite is 0.
    Type: Application
    Filed: March 17, 2014
    Publication date: March 10, 2016
    Applicant: JFE STEEL CORPORATION
    Inventors: Katsumi Nakajima, Kazuhiko Yamazaki, Chikara Kami
  • Publication number: 20160060723
    Abstract: A high-strength hot-rolled steel sheet has a tensile strength TS of 980 MPa or more and is manufactured by controlling the steel sheet to have a chemical composition containing C: more than 0.1% and 0.2% or less, Si: 0.5% or more and 3.0% or less, Mn: 1.0% or more and 3.5% or less, P: 0.05% or less, S: 0.004% or less, Al: 0.10% or less, N: 0.008% or less, Ti: 0.05% or more and 0.15% or less, V: more than 0.10% and 0.30% or less, and the balance being Fe and inevitable impurities. Surface regions have a microstructure including mainly a ferrite phase, and an inner region has a microstructure including mainly a bainite phase. The proportions of the surface regions in the thickness direction of the steel sheet are 1.0% or more and 5.0% or less of the whole thickness respectively from the upper and lower surfaces of the steel sheet.
    Type: Application
    Filed: March 11, 2014
    Publication date: March 3, 2016
    Applicant: JFE Steel Corporation
    Inventors: Kazuhiko Yamazaki, Katsumi Nakajima, Chikara Kami
  • Publication number: 20150368739
    Abstract: There are provided a high-strength hot-rolled steel sheet having high burring formability and a method for manufacturing the high-strength hot-rolled steel sheet. The high-strength hot-rolled steel sheet having high burring formability contains, on a mass percent basis, C: 0.013% or more and less than 0.08%, Si: less than 0.5%, Mn: more than 0.8% and less than 1.2%, P: 0.05% or less, S: 0.005% or less, N: 0.01% or less, Al: 0.1% or less, and Ti: 0.03% or more and 0.15% or less such that C, S, N, and Ti satisfy 0.05?Ti*<0.1 and C×(48/12)?0.16<Ti* (wherein Ti*=Ti?N×(48/14)?S×(48/32), and C, S, N, and Ti denote the amounts (% by mass) of the corresponding elements), the remainder being Fe and incidental impurities, wherein the high-strength hot-rolled steel sheet has a microstructure in which a ferrite phase fraction is more than 90%, a carbide containing Ti is precipitated, and 70% or more of the carbide has a grain size of less than 9 nm.
    Type: Application
    Filed: January 23, 2014
    Publication date: December 24, 2015
    Applicant: JFE STEEL CORPORATION
    Inventors: Katsumi NAKAJIMA, Kazuhiko YAMAZAKI, Chikara KAMI
  • Publication number: 20150368741
    Abstract: There are provided a high-strength hot-rolled steel sheet having high burring formability and a method for manufacturing the high-strength hot-rolled steel sheet. A high-strength hot-rolled steel sheet having high burring formability contains, on a mass percent basis, C: 0.06% or more and 0.13% or less, Si: less than 0.5%, Mn: more than 0.5% and 1.4% or less, P: 0.05% or less, S: 0.005% or less, N: 0.01% or less, Al: 0.1% or less, Ti: 0.05% or more and 0.25% or less, and V: more than 0.15% and 0.4% or less such that S, N, Ti, and V satisfy Ti.+V?0.35 (wherein Ti.?Ti—N×(48/14)?S×(48/32), and S, N, Ti, and V denote the amounts (% by mass) of the corresponding elements), the remainder being Fe and incidental impurities, wherein the high-strength hot-rolled steel sheet has a microstructure in which a ferrite phase fraction is more than 90%, a carbide containing Ti is precipitated, and 70% or more of the carbide has a grain size of less than 9 nm.
    Type: Application
    Filed: January 23, 2014
    Publication date: December 24, 2015
    Applicant: JFE STEEL CORPORATION
    Inventors: Katsumi Nakajima, Kazuhiko Yamazaki, Chikara Kami
  • Publication number: 20150368738
    Abstract: There are provided a high-strength hot-rolled steel sheet having high burring formability and a method for manufacturing the high-strength hot-rolled steel sheet. A high-strength hot-rolled steel sheet having high burring formability contains, on a mass percent basis, C: 0.03% or more and 0.1% or less, Si: less than 0.5%, Mn: more than 0.7% and less than 1.2%, P: 0.05% or less, S: 0.005% or less, N: 0.01% or less, Al: 0.1% or less, and Ti: 0.1% or more and 0.25% or less such that C, S, N, and Ti satisfy Ti*?0.1 and C×(48/12)?0.14<Ti*<C×(48/12)+0.08 (wherein Ti*=Ti?N×(48/14)?S×(48/32), and C, S, N, and Ti denote the amounts (% by mass) of the corresponding elements), the remainder being Fe and incidental impurities, wherein the high-strength hot-rolled steel sheet has a microstructure in which a ferrite phase fraction is more than 90%, a carbide containing Ti is precipitated, and 70% or more of the carbide has a grain size of less than 9 nm.
    Type: Application
    Filed: January 23, 2014
    Publication date: December 24, 2015
    Applicant: JFE STEEL CORPORATION
    Inventors: Katsumi NAKAJIMA, Kazuhiko YAMAZAKI, Chikara KAMI