Patents by Inventor Kazuhisa Hatayama
Kazuhisa Hatayama 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).
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Patent number: 7823418Abstract: A glass base material manufacturing apparatus for manufacturing a glass base material comprising: a plurality burners, arranged in a row at a predetermined intervals along the longitudinal direction of a starting base material of the glass base material, for forming a deposit, which is a base material of the glass base material by depositing glass soot on the starting base material while moving reciprocatory over a section of the entire length of the starting base material along the longitudinal direction of the starting base material; a plurality of flow rate regulators, at least one of which is connected to the plurality of burners, respectively, for regulating a flow rate of raw material gas of the glass soot, which is supplied to the plurality of burners; and a control unit connected to each of the plurality of flow rate regulators for controlling individually the plurality of flow rate regulators.Type: GrantFiled: May 31, 2006Date of Patent: November 2, 2010Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Tadakatsu Shimada, Yuuji Tobisaka, Kazuhisa Hatayama, Hideo Hirasawa
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Publication number: 20100202954Abstract: The present invention provides a silicon manufacturing method for purifying silicon metal to manufacture solar cell silicon by reducing boron contained as impurities in the silicon metal. The present invention provides a silicon manufacturing method including preparing a mixture containing both silicon in a molten state and a molten salt, introducing a gas containing a chlorine atom into the mixture, and introducing moisture vapor together with the chlorine-atom containing gas. The chlorine-atom containing gas may preferably be a chlorine gas or silicon tetrachloride. The molten salt may preferably be composed of a mixture containing at least silicon dioxide and calcium oxide, and the mixture may additionally contain calcium fluoride.Type: ApplicationFiled: March 29, 2009Publication date: August 12, 2010Applicant: SHIN-ETSU CHEMICAL CO., LTD.Inventors: Motoyuki Yamada, Kazuhisa Hatayama
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Publication number: 20100178195Abstract: A method of solidifying metallic silicon, characterized by monodirectionally solidifying a metallic silicon of 800 ppm or less iron concentration. Any metal impurity components of the metallic silicon can be effectively removed with reduced cost through shortened steps.Type: ApplicationFiled: June 6, 2008Publication date: July 15, 2010Inventors: Motoyuki Yamada, Kazuhisa Hatayama
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Patent number: 7213416Abstract: A glass base material manufacturing apparatus for manufacturing a glass base material comprising: a plurality burners, arranged in a row at a predetermined intervals along the longitudinal direction of a starting base material of the glass base material, for forming a deposit, which is a base material of the glass base material by depositing glass soot on the starting base material while moving reciprocatory over a section of the entire length of the starting base material along the longitudinal direction of the starting base material; a plurality of flow rate regulators, at least one of which is connected to the plurality of burners, respectively, for regulating a flow rate of raw material gas of the glass soot, which is supplied to the plurality of burners; and a control unit connected to each of the plurality of flow rate regulators for controlling individually the plurality of flow rate regulators.Type: GrantFiled: July 18, 2001Date of Patent: May 8, 2007Assignee: Shin-Etsu Chemical Co., LTD.Inventors: Tadakatsu Shimada, Yuuji Tobisaka, Kazuhisa Hatayama, Hideo Hirasawa
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Publication number: 20060213229Abstract: A glass base material manufacturing apparatus for manufacturing a glass base material comprising: a plurality burners, arranged in a row at a predetermined intervals along the longitudinal direction of a starting base material of the glass base material, for forming a deposit, which is a base material of the glass base material by depositing glass soot on the starting base material while moving reciprocatory over a section of the entire length of the starting base material along the longitudinal direction of the starting base material; a plurality of flow rate regulators, at least one of which is connected to the plurality of burners, respectively, for regulating a flow rate of raw material gas of the glass soot, which is supplied to the plurality of burners; and a control unit connected to each of the plurality of flow rate regulators for controlling individually the plurality of flow rate regulators.Type: ApplicationFiled: May 31, 2006Publication date: September 28, 2006Applicant: SHIN-ETSU CHEMICAL CO., LTD.Inventors: Tadakatsu Shimada, Yuuji Tobisaka, Kazuhisa Hatayama, Hideo Hirasawa
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Publication number: 20050147367Abstract: A method for manufacturing a base material for an optical fiber, includes steps of: holding a bar material by a support member; and adjusting to reduce a difference between an axis of the bar material and a rotational axis of the support member. Furthermore, an optical fiber base material grasping apparatus for holding a bar material having an axis, includes: a support member having a center axis, the support member being rotatable around the center axis; and an adjusting mechanism for reducing a difference between the axis of the bar material and the central axis of the support member.Type: ApplicationFiled: September 7, 2004Publication date: July 7, 2005Inventors: Tadakatsu Shimada, Dai Inoue, Hiroshi Oyamada, Kazuhisa Hatayama, Hiroshi Machida, Tetsuya Otosaka, Fumio Saitoh, Yasuhiro Nakashima, Takeshi Kamio, Masami Terashima, Isao Arisaka, Soichiro Kemmochi, Hideo Hirasawa
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Publication number: 20050132753Abstract: A method for manufacturing an optical fiber comprises setting a heating condition for heating a glass rod, which is a parent material of the optical-fiber, and an elongating speed of the glass rod based on a prescribed numerical value which changes with a progress of elongation of the glass rod; heating and elongating the glass rod to generate a preform based on the heating condition and the elongating speed which are set by the setting; and drawing the preform to a filament-like form by further heating the preform to generate the optical fiber.Type: ApplicationFiled: February 1, 2005Publication date: June 23, 2005Inventors: Yoshiaki Shimizu, Takaaki Nagano, Tadakatsu Shimada, Hideo Hirasawa, Masataka Watanabe, Kazuhisa Hatayama, Mitsukuni Sakashita, Minoru Taya, Waichi Yamamura, Shinji Suzuki, Jiro Moriya
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Patent number: 6848276Abstract: A method for manufacturing an optical fiber comprises setting a heating condition for heating a glass rod, which is a parent material of the optical fiber, and an elongating speed of the glass rod based on a prescribed numerical value which changes with a progress of elongation of the glass rod; heating and elongating the glass rod to generate a preform based on the heating condition and the elongating speed which are set by the setting; and drawing the preform to a filament-like form by further heating the preform to generate the optical fiber.Type: GrantFiled: June 3, 2002Date of Patent: February 1, 2005Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Yoshiaki Shimizu, Takaaki Nagano, Tadakatsu Shimada, Hideo Hirasawa, Masataka Watanabe, Kazuhisa Hatayama, Mitsukuni Sakashita, Minoru Taya, Waichi Yamamura, Shinji Suzuki, Jiro Moriya
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Patent number: 6779362Abstract: A method for manufacturing an optical fiber comprises setting a heating condition for heating a glass rod, which is a parent material of the optical fiber, and an elongating speed of the glass rod based on a prescribed numerical value which changes with a progress of elongation of the glass rod; heating and elongating the glass rod to generate a preform based on the heating condition and the elongating speed which are set by the setting; and drawing the preform to a filament-like form by further heating the preform to generate the optical fiber.Type: GrantFiled: June 3, 2002Date of Patent: August 24, 2004Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Yoshiaki Shimizu, Takaaki Nagano, Tadakatsu Shimada, Hideo Hirasawa, Masataka Watanabe, Kazuhisa Hatayama, Mitsukuni Sakashita, Minoru Taya, Waichi Yamamura, Shinji Suzuki, Jiro Moriya
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Patent number: 6698240Abstract: An apparatus for manufacturing a glass base material which is an parent material of an optical fiber, comprising: a tank which contains a raw material of the glass base material to vaporize the raw material to generate a raw material in gas phase; a temperature control unit which controls a temperature of the raw material; and a pressure control unit which controls the pressure of the raw material in gas phase.Type: GrantFiled: June 2, 2000Date of Patent: March 2, 2004Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Hiroshi Tsumura, Hiroyuki Koide, Yuuji Tobisaka, Kazuhisa Hatayama, Go Ogino, Tadakatsu Shimada, Hideo Hirasawa
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Publication number: 20030233849Abstract: A glass base material manufacturing apparatus for manufacturing a glass base material comprising: a plurality burners, arranged in a row at a predetermined intervals along the longitudinal direction of a starting base material of the glass base material, for forming a deposit, which is a base material of the glass base material by depositing glass soot on the starting base material while moving reciprocatory over a section of the entire length of the starting base material along the longitudinal direction of the starting base material; a plurality of flow rate regulators, at least one of which is connected to the plurality of burners, respectively, for regulating a flow rate of raw material gas of the glass soot, which is supplied to the plurality of burners; and a control unit connected to each of the plurality of flow rate regulators for controlling individually the plurality of flow rate regulators.Type: ApplicationFiled: June 16, 2003Publication date: December 25, 2003Inventors: Tadakatsu Shimada, Yuuji Tobisaka, Kazuhisa Hatayama, Hideo Hirasawa
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Publication number: 20020152772Abstract: A method for manufacturing an optical fiber comprises setting a heating condition for heating a glass rod, which is a parent material of the optical fiber, and an elongating speed of the glass rod based on a prescribed numerical value which changes with a progress of elongation of the glass rod; heating and elongating the glass rod to generate a preform based on the heating condition and the elongating speed which are set by the setting; and drawing the preform to a filament-like form by further heating the preform to generate the optical fiber.Type: ApplicationFiled: June 3, 2002Publication date: October 24, 2002Inventors: Yoshiaki Shimizu, Takaaki Nagano, Tadakatsu Shimada, Hideo Hirasawa, Masataka Watanabe, Kazuhisa Hatayama, Mitsukuni Sakashita, Minoru Taya, Waichi Yamamura, Shinji Suzuki, Jiro Moriya
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Publication number: 20020148257Abstract: A method for manufacturing an optical fiber comprises setting a heating condition for heating a glass rod, which is a parent material of the optical fiber, and an elongating speed of the glass rod based on a prescribed numerical value which changes with a progress of elongation of the glass rod; heating and elongating the glass rod to generate a preform based on the heating condition and the elongating speed which are set by the setting; and drawing the preform to a filament-like form by further heating the preform to generate the optical fiber.Type: ApplicationFiled: June 3, 2002Publication date: October 17, 2002Applicant: Shin-Etsu Chemical Co., Ltd.Inventors: Yoshiaki Shimizu, Takaaki Nagano, Tadakatsu Shimada, Hideo Hirasawa, Masataka Watanabe, Kazuhisa Hatayama, Mitsukuni Sakashita, Minoru Taya, Waichi Yamamura, Shinji Suzuki, Jiro Moriya
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Publication number: 20020144520Abstract: A method for manufacturing an optical fiber comprises setting a heating condition for heating a glass rod, which is a parent material of the optical fiber, and an elongating speed of the glass rod based on a prescribed numerical value which changes with a progress of elongation of the glass rod; heating and elongating the glass rod to generate a preform based on the heating condition and the elongating speed which are set by the setting; and drawing the preform to a filament-like form by further heating the preform to generate the optical fiber.Type: ApplicationFiled: June 3, 2002Publication date: October 10, 2002Applicant: Shin-Etsu Chemical Co., Ltd.Inventors: Yoshiaki Shimizu, Takaaki Nagano, Tadakatsu Shimada, Hideo Hirasawa, Masataka Watanabe, Kazuhisa Hatayama, Mitsukuni Sakashita, Minoru Taya, Waichi Yamamura, Shinji Suzuki, Jiro Moriya
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Publication number: 20020139148Abstract: A method for manufacturing an optical fiber comprises setting a heating condition for heating a glass rod, which is a parent material of the optical fiber, and an elongating speed of the glass rod based on a prescribed numerical value which changes with a progress of elongation of the glass rod; heating and elongating the glass rod to generate a preform based on the heating condition and the elongating speed which are set by the setting; and drawing the preform to a filament-like form by further heating the preform to generate the optical fiber.Type: ApplicationFiled: June 3, 2002Publication date: October 3, 2002Applicant: Shin-Etsu Chemical Co., Ltd.Inventors: Yoshiaki Shimizu, Takaaki Nagano, Tadakatsu Shimada, Hideo Hirasawa, Masataka Watanabe, Kazuhisa Hatayama, Mitsukuni Sakashita, Minoru Taya, Waichi Yamamura, Shinji Suzuki, Jiro Moriya
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Publication number: 20020139149Abstract: A method for manufacturing an optical fiber comprises setting a heating condition for heating a glass rod, which is a parent material of the optical fiber, and an elongating speed of the glass rod based on a prescribed numerical value which changes with a progress of elongation of the glass rod; heating and elongating the glass rod to generate a preform based on the heating condition and the elongating speed which are set by the setting; and drawing the preform to a filament-like form by further heating the preform to generate the optical fiber.Type: ApplicationFiled: June 3, 2002Publication date: October 3, 2002Applicant: Shin-Etsu Chemical Co., Ltd.Inventors: Yoshiaki Shimizu, Takaaki Nagano, Tadakatsu Shimada, Hideo Hirasawa, Masataka Watanabe, Kazuhisa Hatayama, Mitsukuni Sakashita, Minoru Taya, Waichi Yamamura, Shinji Suzuki, Jiro Moriya
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Patent number: 6386001Abstract: A method for manufacturing an optical fiber comprises setting a heating condition for heating a glass rod, which is a parent material of the optical fiber, and an elongating speed of the glass rod based on a prescribed numerical value which changes with a progress of elongation of the glass rod; heating and elongating the glass rod to generate a preform based on the heating condition and the elongating speed which are set by the setting; and drawing the preform to a filament-like form by further heating the preform to generate the optical fiber.Type: GrantFiled: November 5, 1999Date of Patent: May 14, 2002Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Yoshiaki Shimizu, Takaaki Nagano, Tadakatsu Shimada, Hideo Hirasawa, Masataka Watanabe, Kazuhisa Hatayama, Mitsukuni Sakashita, Minoru Taya, Waichi Yamamura, Shinji Suzuki, Jiro Moriya
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Publication number: 20020020193Abstract: A method for manufacturing a base material for an optical fiber, includes steps of: holding a bar material by a support member; and adjusting to reduce a difference between an axis of the bar material and a rotational axis of the support member. Furthermore, an optical fiber base material grasping apparatus for holding a bar material having an axis, includes: a support member having a center axis, the support member being rotatable around the center axis; and an adjusting mechanism for reducing a difference between the axis of the bar material and the central axis of the support member.Type: ApplicationFiled: December 1, 2000Publication date: February 21, 2002Inventors: Tadakatsu Shimada, Dai Inoue, Hiroshi Oyamada, Kazuhisa Hatayama, Hiroshi Machida, Tetsuya Otosaka, Fumio Saitoh, Yasuhiro Nakashima, Takeshi Kamio, Masami Terashima, Isao Arisaka, Shoichiro Kemmochi, Hideo Hirasama