Patents by Inventor Natsuo Nishijima

Natsuo Nishijima 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: 10811042
    Abstract: A thermally assisted magnetic recording head and a thermally assisted magnetic recording disk drive are disclosed. The thermally assisted magnetic recording head includes a slider body, a laser substrate, a laser and a magnetic head, wherein the laser substrate is provided on the slider body, the laser is provided on the laser substrate, and the magnetic head is provided at a front end of the slider body. The magnetic head includes an optical waveguide facing the laser. The angle between a light incident surface of the optical waveguide and an incident direction of a laser light incident on the optical waveguide is less than 90 degrees. The thermally assisted magnetic recording disk drive includes a plurality of magnetic disks and a magnetic head suspending frame. A front end of the magnetic head suspending frame is provided with the thermally assisted magnetic recording heads mentioned above.
    Type: Grant
    Filed: December 24, 2018
    Date of Patent: October 20, 2020
    Assignee: SAE Magnetics (H.K.) Ltd.
    Inventors: Ryuji Fujii, Jian Hui Huang, Natsuo Nishijima, Lin Huang, Shi Xiong Chen, Bin Qi, Wen Rong Guo
  • Publication number: 20200143827
    Abstract: A thermally assisted magnetic recording head and a thermally assisted magnetic recording disk drive are disclosed. The thermally assisted magnetic recording head includes a slider body, a laser substrate, a laser and a magnetic head, wherein the laser substrate is provided on the slider body, the laser is provided on the laser substrate, and the magnetic head is provided at a front end of the slider body. The magnetic head includes an optical waveguide facing the laser. The angle between a light incident surface of the optical waveguide and an incident direction of a laser light incident on the optical waveguide is less than 90 degrees. The thermally assisted magnetic recording disk drive includes a plurality of magnetic disks and a magnetic head suspending frame. A front end of the magnetic head suspending frame is provided with the thermally assisted magnetic recording heads mentioned above.
    Type: Application
    Filed: December 24, 2018
    Publication date: May 7, 2020
    Inventors: Ryuji Fujii, Jian Hui Huang, Natsuo Nishijima, Lin Huang, Shi Xiong Chen, Bin Qi, Wen Rong Guo
  • Patent number: 10614841
    Abstract: A thermally assisted magnetic head includes a slider, the slider includes a slider substrate and a magnetic head part. The magnetic head part includes a medium-opposing surface opposing a magnetic recording medium, a light source-opposing surface arranged rear side of the medium-opposing surface, an anti-reflection film formed on the light source-opposing surface, a core layer and a cladding layer. The anti-reflection film includes a stacked structure which a first layer and a second layer are stacked. The second layer is formed with high refractive index dielectric having the refractive index higher than the first layer.
    Type: Grant
    Filed: November 30, 2018
    Date of Patent: April 7, 2020
    Assignee: SAE MAGNETICS (H.K.) LTD.
    Inventors: Ryo Hosoi, Seiichi Takayama, Natsuo Nishijima, Takashi Honda
  • Patent number: 9679586
    Abstract: A manufacturing method of a write portion for a thermally assisted magnetic head slider includes providing a write portion including a write element, a waveguide, and a plasmon unit; lapping opposed-to-magnetic recording medium surfaces of the write element and the waveguide, and an near-field light generating surface of the plasmon unit; only forming a carbon layer on the opposed-to-magnetic recording medium surface of the write element. Corrosive elements in the write portion can be prevented from being corroded and the write element can be prevented from being worn and abraded not only, stable thermal ability for a plasmon unit can be maintained but also.
    Type: Grant
    Filed: May 5, 2015
    Date of Patent: June 13, 2017
    Assignee: SAE MAGNETICS (H.K.) LTD.
    Inventors: Natsuo Nishijima, Dong Sheng Li
  • Publication number: 20160027453
    Abstract: A surface forming method for electronic component includes: forming a body that has at least one waveguide, with two ends of the waveguide exposed on a front end surface and a back end surface of the body; forming a photoresist film to cover on the front end surface of the body; irradiating a light from the back end surface of the body to remove a part, of the photoresist film, that covers at least a part of an end surface of the waveguide, thereby forming an exposed area on the end surface of the waveguide; etching the exposed area of the waveguide to form a recess; and removing the photoresist film. The position and size of the pattern could be controlled accurately and efficiently, instead of inefficient complex procedures of alignment.
    Type: Application
    Filed: July 25, 2014
    Publication date: January 28, 2016
    Inventors: Natsuo Nishijima, Jian Hui Huang, Hong Tao Ma, Huan Chao Liang
  • Patent number: 9245544
    Abstract: A surface forming method for electronic component includes: forming a body that has at least one waveguide, with two ends of the waveguide exposed on a front end surface and a back end surface of the body; forming a photoresist film to cover on the front end surface of the body; irradiating a light from the back end surface of the body to remove a part, of the photoresist film, that covers at least a part of an end surface of the waveguide, thereby forming an exposed area on the end surface of the waveguide; etching the exposed area of the waveguide to form a recess; and removing the photoresist film. The position and size of the pattern could be controlled accurately and efficiently, instead of inefficient complex procedures of alignment.
    Type: Grant
    Filed: July 25, 2014
    Date of Patent: January 26, 2016
    Assignee: SAE MAGNETICS (H.K.) LTD.
    Inventors: Natsuo Nishijima, Jian Hui Huang, Hong Tao Ma, Huan Chao Liang
  • Publication number: 20150235657
    Abstract: A manufacturing method of a write portion for a thermally assisted magnetic head slider includes providing a write portion including a write element, a waveguide, and a plasmon unit; lapping opposed-to-magnetic recording medium surfaces of the write element and the waveguide, and an near-field light generating surface of the plasmon unit; only forming a carbon layer on the opposed-to-magnetic recording medium surface of the write element. Corrosive elements in the write portion can be prevented from being corroded and the write element can be prevented from being worn and abraded not only, stable thermal ability for a plasmon unit can be maintained but also.
    Type: Application
    Filed: May 5, 2015
    Publication date: August 20, 2015
    Inventors: Natsuo NISHIJIMA, Dong Sheng LI
  • Patent number: 9099129
    Abstract: A write portion for a thermally assisted magnetic head slider includes an air bearing surface facing to a magnetic recording medium; a write element having an opposed-to-magnetic recording medium surface; a waveguide for guiding light generated by a light source module mounted on a substrate of the thermally assisted magnetic head slider; and a plasmon unit provided around the write element, which has a near-field light generating surface for propagating near-field light to the air bearing surface. And only the opposed-to-magnetic recording medium surface of the write element is covered by a carbon layer. The invention can prevent corrosive elements in the write portion from being corroded and prevent the write element from being worn and abraded not only, and maintain stable thermal ability for a plasmon unit but also.
    Type: Grant
    Filed: April 3, 2013
    Date of Patent: August 4, 2015
    Assignee: SAE Magnetics (H.K.) Ltd.
    Inventors: Natsuo Nishijima, Dong Sheng Li
  • Patent number: 8801945
    Abstract: A write element for a thermally assisted magnetic head slider includes an air bearing surface facing to a magnetic recording medium; a first magnetic pole, a second magnetic pole, and coils sandwiched between the first and the second magnetic poles; a waveguide for guiding light generated by a light source module mounted on a substrate; and a plasmon unit provided around the first magnetic pole and the waveguide, which has a near-field light generating surface for propagating near-field light to the air bearing surface. The near-field light generating surface of the plasmon unit is apart from the air bearing surface with a first predetermined distance to form a first recess, and the first recess is filled in with a protective layer. The thermally assisted magnetic head slider can prevent the plasmon unit from protruding over the air bearing surface, thereby improving the performance of thermally assisted magnetic head.
    Type: Grant
    Filed: December 31, 2013
    Date of Patent: August 12, 2014
    Assignee: SAE Magnetics (H.K.) Ltd.
    Inventors: Natsuo Nishijima, Ryuji Fujii, Hong Tao Ma, Jian Hui Huang, Huan Chao Liang, Zhong Xian Wei
  • Publication number: 20140131309
    Abstract: A write element for a thermally assisted magnetic head slider includes an air bearing surface facing to a magnetic recording medium; a first magnetic pole, a second magnetic pole, and coils sandwiched between the first and the second magnetic poles; a waveguide for guiding light generated by a light source module mounted on a substrate; and a plasmon unit provided around the first magnetic pole and the waveguide, which has a near-field light generating surface for propagating near-field light to the air bearing surface. The near-field light generating surface of the plasmon unit is apart from the air bearing surface with a first predetermined distance to form a first recess, and the first recess is filled in with a protective layer. The thermally assisted magnetic head slider can prevent the plasmon unit from protruding over the air bearing surface, thereby improving the performance of thermally assisted magnetic head.
    Type: Application
    Filed: December 31, 2013
    Publication date: May 15, 2014
    Applicant: SAE Magnetics (H.K.) Ltd.
    Inventors: Natsuo NISHIJIMA, Ryuji FUJII, Hong Tao MA, Jian Hui HUANG, Huan Chao LIANG, Zhong Xian WEI
  • Patent number: 8638645
    Abstract: A write element for a thermally assisted magnetic head slider includes an air bearing surface facing to a magnetic recording medium; a first magnetic pole, a second magnetic pole, and coils sandwiched between the first and the second magnetic poles; a waveguide for guiding light generated by a light source module mounted on a substrate; and a plasmon unit provided around the first magnetic pole and the waveguide, which has a near-field light generating surface for propagating near-field light to the air bearing surface. The near-field light generating surface of the plasmon unit is apart from the air bearing surface with a first predetermined distance to form a first recess, and the first recess is filled in with a protective layer. The thermally assisted magnetic head slider can prevent the plasmon unit from protruding over the air bearing surface, thereby improving the performance of thermally assisted magnetic head.
    Type: Grant
    Filed: November 13, 2012
    Date of Patent: January 28, 2014
    Assignee: SAE Magnetics (H.K.) Ltd.
    Inventors: Natsuo Nishijima, Ryuji Fujii, Hong Tao Ma, Jian Hui Huang, Huan Chao Liang, Zhong Xian Wei
  • Patent number: 8588040
    Abstract: A thermally assisted magnetic head slider includes an air bearing surface facing to a magnetic recording medium, a read portion, and a write portion including a write element, a waveguide for guiding light generated by the light source module, and a plasmon unit provided around the write portion and the waveguide. A first coat layer with a first thickness which has a first light absorption index is covered on an opposed-to-medium surface of the read portion, and a second coat layer with a second thickness which has a second light absorption index is covered on an opposed-to medium surface of the write portion, wherein the second thickness is larger than the first thickness, and the second light absorption index is smaller than the first light absorption index. The slider can protect the write portion and improve the reading performance of the read portion.
    Type: Grant
    Filed: December 21, 2012
    Date of Patent: November 19, 2013
    Assignees: SAE Magnetics (H.K.) Ltd., TDK Corporation
    Inventors: Yasutoshi Fujita, Ryuji Fujii, Hideki Tanzawa, Natsuo Nishijima, Tai Boon Lee, Jian Hui Huang, Huan Chao Liang, Koji Shimazawa, Kei Hirata, Daisuke Miyauchi