Patents by Inventor Chiseki Haginoya
Chiseki Haginoya 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: 8268209Abstract: In a mold in which a pattern is formed of a fine concavo-convex shape, two or more of alignment marks for determining a relative positional relation between a substrate and a mold are formed concentrically. Moreover, a damaged mark is identified from the positional information and shape of the respective marks, and an alignment between the mold and the substrate to which a resin film is applied is carried out excluding the damaged mark.Type: GrantFiled: January 17, 2007Date of Patent: September 18, 2012Assignee: Hitachi, Ltd.Inventors: Masahiko Ogino, Akihiro Miyauchi, Takashi Ando, Chiseki Haginoya, Susumu Komoriya, Yasunari Sohda, Souichi Katagiri, Hiroya Ohta, Yoshinori Nakayama
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Patent number: 8178223Abstract: In a magnetic recording medium, there are realized an improvement in surface planarity and a reduction in characteristic degradation. The magnetic recording medium is fabricated so that the upper layer of a recording layer and a refill layer are formed of the same material.Type: GrantFiled: February 4, 2009Date of Patent: May 15, 2012Assignee: Hitachi, Ltd.Inventors: Hisako Takei, Chiseki Haginoya, Hiroshi Suzuki
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Patent number: 8029952Abstract: There is provided a method for fabricating a magnetic recording medium that provides high throughput, low manufacturing cost, and no degradation in accuracy in pattern size in fine pattern formation. A resist layer is formed on a substrate or cutting work layer. The surface of the substrate is divided into two or more areas using the center of rotation of the substrate as a reference point. An optical, contactless pattern transfer method is used to transfer a figure pattern contained in the divided area through a mask to the resist layer so as to form a latent image of the figure pattern. The pattern transfer is similarly carried out for the divided area. After the pattern transfer processes for all the divided areas are completed, the entire resist layer is developed to form a resist pattern. The resist pattern is used as a mask to cut the substrate or cutting work layer. As a result, there is provided the substrate or cut work layer onto which a fine pattern has been transferred.Type: GrantFiled: November 15, 2007Date of Patent: October 4, 2011Assignee: Hitachi, Ltd.Inventors: Yuko Tsuchiya, Chiseki Haginoya
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Patent number: 7998605Abstract: Embodiments of the invention provide ways to manufacture an inexpensive high-density magnetic recording medium. A high-density magnetic recording medium is composed of a flat substrate, a nonmagnetic intermediary body having a periodic recessed-relieved structure, and a magnetic film formed on the intermediary body.Type: GrantFiled: September 15, 2006Date of Patent: August 16, 2011Assignee: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Chiseki Haginoya, Takashi Ando, Masahiko Ogino
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Patent number: 7969691Abstract: A read sensor is disposed near a main pole, thereby reducing the distance between the read sensor and a write sensor. In this case, however, a magnetic field generated from the main pole affects magnetization of a free layer and a pinned layer of a magnetoresistive film, thereby causing the magnetizing directions to rotate, a magnetic barrier to be generated, and the read property to be degraded. According to the present invention, a main pole and a yoke configure a magnetic circuit together with a sub-pole and a soft magnetic under layer of the magnetic disk and an exciting coil magnetizes the magnetic circuit, thereby a recording magnetic field is applied to a recording layer to record information bits on the layer. And in order to sharpen the magnetic field distribution generated by the main pole, a trailing shield made of a ferromagnetic material is disposed at the trailing side of the main pole adjacently.Type: GrantFiled: January 15, 2008Date of Patent: June 28, 2011Assignee: Hitachi, Ltd.Inventors: Yoshiaki Kawato, Chiseki Haginoya, Kaori Suzuki
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Patent number: 7599151Abstract: Embodiments of the invention provide a magnetic recording and read head which reduces the spread read width in a narrow track having a width of 100 nm or less and shows stable read operation. In one embodiment, a side magnetic shield has a multi-layered structure including non-magnetic separate layers and soft magnetic layers, and the soft magnetic layers are magnetized in opposite directions to reduce a magnetic field induced by the side magnetic shield.Type: GrantFiled: October 29, 2004Date of Patent: October 6, 2009Assignee: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Masahiko Hatatani, Chiseki Haginoya, Kenichi Meguro, Kazuhiro Nakamoto
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Publication number: 20090207527Abstract: In a magnetic recording medium, there are realized an improvement in surface planarity and a reduction in characteristic degradation. The magnetic recording medium is fabricated so that the upper layer of a recording layer and a refill layer are formed of the same material.Type: ApplicationFiled: February 4, 2009Publication date: August 20, 2009Inventors: Hisako Takei, Chiseki Haginoya, Hiroshi Suzuki
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Patent number: 7535683Abstract: A magnetoresistive head and a fabricating method thereof accomplishing high sensitivity and low noise are provided even if track width narrowing makes progress. In one embodiment, a pinned layer includes a laminate which includes at least two magnetic layers and where adjacent magnetic layers are coupled antiferromagnetically to each other, and a mechanism to apply a longitudinal biasing field to a free layer is made to function by laminating a nonmagnetic separate layer/longitudinal biasing layer/antiferromagnetic layer connecting the free layer and opposite a nonmagnetic conductive layer (or nonmagnetic tunneling barrier layer). Controlling a magnetization direction of the longitudinal biasing layer which bears application of a longitudinal biasing field to the pinned layer and free layer is achieved by annealing carried out while applying a magnetic field in a track width direction and applying a magnetic field at room temperature.Type: GrantFiled: October 29, 2004Date of Patent: May 19, 2009Assignee: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Kenichi Meguro, Kouichi Nishioka, Masahiko Hatatani, Chiseki Haginoya
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Patent number: 7505232Abstract: In a side shield structure employed to narrow the effective track, a noise caused by the side shield structure can be reduced. In one embodiment, the side shield is inclined with respect to the film plane to suppress the generation of a magnetic pole in the end portion of the side shield. To this end, the side face of a device is inclined at a desired angle. Further, a reproduction device is formed at two or more angles ?1 and ?2 to improve the track width accuracy.Type: GrantFiled: June 24, 2005Date of Patent: March 17, 2009Assignee: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Chiseki Haginoya, Masahiko Hatatani, Chiaki Ishakawa, Kenichi Meguro, Kazuhiro Nakamoto, Katsuro Watanabe
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Publication number: 20090067093Abstract: A discrete track medium and a bit patterned medium with a high SNR are manufactured at low cost. A seed layer and a recoding layer are formed on a bottom surface and a side wall of a groove portion, which is formed between non-magnetic projected structures artificially patterned. Then, the recording layer on the projected portion is removed.Type: ApplicationFiled: August 5, 2008Publication date: March 12, 2009Inventors: Chiseki Haginoya, Yuko Tsuchiya, Hisako Takei
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Publication number: 20080212239Abstract: A read sensor is disposed near a main pole, thereby reducing the distance between the read sensor and a write sensor. In this case, however, a magnetic field generated from the main pole affects magnetization of a free layer and a pinned layer of a magnetoresistive film, thereby causing the magnetizing directions to rotate, a magnetic barrier to be generated, and the read property to be degraded. According to the present invention, a main pole and a yoke configure a magnetic circuit together with a sub-pole and a soft magnetic under layer of the magnetic disk and an exciting coil magnetizes the magnetic circuit, thereby a recording magnetic field is applied to a recording layer to record information bits on the layer. And in order to sharpen the magnetic field distribution generated by the main pole, a trailing shield made of a ferromagnetic material is disposed at the trailing side of the main pole adjacently.Type: ApplicationFiled: January 15, 2008Publication date: September 4, 2008Inventors: Yoshiaki Kawato, Chiseki Haginoya, Kaori Suzuki
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Publication number: 20080204934Abstract: There is provided a method for fabricating a magnetic recording medium that provides high throughput, low manufacturing cost, and no degradation in accuracy in pattern size in fine pattern formation. A resist layer is formed on a substrate or cutting work layer. The surface of the substrate is divided into two or more areas using the center of rotation of the substrate as a reference point. An optical, contactless pattern transfer method is used to transfer a figure pattern contained in the divided area through a mask to the resist layer so as to form a latent image of the figure pattern. The pattern transfer is similarly carried out for the divided area. After the pattern transfer processes for all the divided areas are completed, the entire resist layer is developed to form a resist pattern. The resist pattern is used as a mask to cut the substrate or cutting work layer. As a result, there is provided the substrate or cut work layer onto which a fine pattern has been transferred.Type: ApplicationFiled: November 15, 2007Publication date: August 28, 2008Inventors: Yuko Tsuchiya, Chiseki Haginoya
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Patent number: 7351445Abstract: The present invention is directed to carrying out a high density magnetic recording to a material having a large coercive force by perpendicular magnetic recording head. By giving a patterning onto a soft magnetic under layer of a perpendicular two-layer recording media in sync with a period of a recording bit, a magnetic field from a write head can be allowed to converge to a soft magnetic column. Therefore, a magnetization reversal of the magnetic recording media material having a large anisotropic constant becomes possible, and then a high density magnetic recording can be achieved.Type: GrantFiled: June 12, 2006Date of Patent: April 1, 2008Assignee: Hitachi, Ltd.Inventors: Chiseki Haginoya, Kaori Suzuki, Hisashi Kimura, Masaaki Futamoto, Hideo Matsuyama
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Publication number: 20070164458Abstract: In a mold in which a pattern is formed of a fine concavo-convex shape, two or more of alignment marks for determining a relative positional relation between a substrate and a mold are formed concentrically. Moreover, a damaged mark is identified from the positional information and shape of the respective marks, and an alignment between the mold and the substrate to which a resin film is applied is carried out excluding the damaged mark.Type: ApplicationFiled: January 17, 2007Publication date: July 19, 2007Inventors: Masahiko Ogino, Akihiro Miyauchi, Takashi Ando, Chiseki Haginoya, Susumu Komoriya, Yasunari Sohda, Souichi Katagiri, Hiroya Ohta, Yoshinori Nakayama
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Publication number: 20070072013Abstract: Embodiments of the invention provide ways to manufacture an inexpensive high-density magnetic recording medium. A high-density magnetic recording medium is composed of a flat substrate, a nonmagnetic intermediary body having a periodic recessed-relieved structure, and a magnetic film formed on the intermediary body.Type: ApplicationFiled: September 15, 2006Publication date: March 29, 2007Applicant: Hitachi Global Storage TechnologiesInventors: Chiseki Haginoya, Takashi Ando, Masahiko Ogino
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Publication number: 20060286193Abstract: In an imprint device and a microstructure transfer method, a fluid is ejected at the back of at least either a stamper or a transfer target body during pressurization of the stamper and the transfer target body. The fluid is ejected through plural holes formed in a stage disposed at the back of at least either the stamper or the transfer target body. The plural holes are connected to independent pressure regulating mechanisms, which can individually control the amount of fluid ejection, the timing of start of ejection, and so on. When the stamper is peeled from the transfer target body, the plural holes are evacuated to fix the stamper or the transfer target body to the stage by suction so as to peel the stamper.Type: ApplicationFiled: May 23, 2006Publication date: December 21, 2006Inventors: Takashi Ando, Susumu Komoriya, Masahiko Ogino, Chiseki Haginoya, Akihiro Miyauchi
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Publication number: 20060226116Abstract: The present invention is directed to carrying out a high density magnetic recording to a material having a large coercive force by perpendicular magnetic recording head. By giving a patterning onto a soft magnetic under layer of a perpendicular two-layer recording media in sync with a period of a recording bit, a magnetic field from a write head can be allowed to converge to a soft magnetic column. Therefore, a magnetization reversal of the magnetic recording media material having a large anisotropic constant becomes possible, and then a high density magnetic recording can be achieved.Type: ApplicationFiled: June 12, 2006Publication date: October 12, 2006Inventors: Chiseki Haginoya, Kaori Suzuki, Hisashi Kimura, Masaaki Futamoto, Hideo Matsuyama
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Patent number: 7097924Abstract: The present invention is directed to-carrying out a high density magnetic recording to a material having a large coercive force by perpendicular magnetic recording head. By giving a patterning onto a soft magnetic under layer of a perpendicular two-layer recording media in sync with a period of a recording bit, a magnetic field from a write head can be allowed to converge to a soft magnetic column. Therefore, a magnetization reversal of the magnetic recording media material having a large anisotropic constant becomes possible, and then a high density magnetic recording can be achieved.Type: GrantFiled: December 30, 2003Date of Patent: August 29, 2006Assignee: Hitachi, Ltd.Inventors: Chiseki Haginoya, Kaori Suzuki, Hisashi Kimura, Masaaki Futamoto, Hideo Matsuyama
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Publication number: 20060018055Abstract: In a side shield structure employed to narrow the effective track, a noise caused by the side shield structure can be reduced. In one embodiment, the side shield is inclined with respect to the film plane to suppress the generation of a magnetic pole in the end portion of the side shield. To this end, the side face of a device is inclined at a desired angle. Further, a reproduction device is formed at two or more angles ?1 and ?2 to improve the track width accuracy.Type: ApplicationFiled: June 24, 2005Publication date: January 26, 2006Applicant: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Chiseki Haginoya, Masahiko Hatatani, Chiaki Ishikawa, Kenichi Meguro, Kazuhiro Nakamoto, Katsuro Watanabe
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Publication number: 20050162786Abstract: A magnetoresistive head and a fabricating method thereof accomplishing high sensitivity and low noise are provided even if track width narrowing makes progress. In one embodiment, a pinned layer includes a laminate which includes at least two magnetic layers and where adjacent magnetic layers are coupled antiferromagnetically to each other, and a mechanism to apply a longitudinal biasing field to a free layer is made to function by laminating a nonmagnetic separate layer/longitudinal biasing layer/antiferromagnetic layer connecting the free layer and opposite a nonmagnetic conductive layer (or nonmagnetic tunneling barrier layer). Controlling a magnetization direction of the longitudinal biasing layer which bears application of a longitudinal biasing field to the pinned layer and free layer is achieved by annealing carried out while applying a magnetic field in a track width direction and applying a magnetic field at room temperature.Type: ApplicationFiled: October 29, 2004Publication date: July 28, 2005Applicant: Hitachi Global Storage Technologies Netherlands, B.V.Inventors: Kenichi Meguro, Kouichi Nishioka, Masahiko Hatatani, Chiseki Haginoya