Thin Film Longitudinal Recording Head Patents (Class 360/125.33)
  • Patent number: 11075026
    Abstract: Embodiments herein describe techniques for a magnetic conductive device including a substrate, an under layer above the substrate, and a magnetic conductive layer including NiFe alloy formed on the under layer. A method for forming a magnetic conductive device includes forming a support stack including an under layer above a substrate, cleaning the support stack, and performing electrodeposition on the under layer by placing the support stack into a plating bath to form NiFe alloy on the under layer. The NiFe alloy includes Ni in a range of about 74% to about 84%, and Fe in a range of about 26% to about 16%. Other embodiments may be described and/or claimed.
    Type: Grant
    Filed: April 30, 2019
    Date of Patent: July 27, 2021
    Assignee: ARIZONA BOARD OF REGENTS ON BEHALF OF ARIZONA STATE UNIVERSITY
    Inventors: Minglu Liu, Karl Sieradzki, Brandon Dowd, Rodolfo E. Diaz
  • Patent number: 10651371
    Abstract: According to an embodiment, a magnetic element includes a first layer, a first magnetic layer, a second magnetic layer, a first nonmagnetic layer, a second layer, and a third magnetic layer. The first layer includes ruthenium. The second magnetic layer is provided between the first layer and the first magnetic layer. The first nonmagnetic layer provided between the first magnetic layer and the second magnetic layer. The second layer includes tantalum. The second layer contacts the first layer and is provided between the first layer and the second magnetic layer. A lattice plane spacing of the second layer in a first direction is not less than 0.23 nm and not more than 0.25 nm. The first direction is from the first layer toward the first magnetic layer. The third magnetic layer includes manganese. The third magnetic layer is provided between the second layer and the second magnetic layer.
    Type: Grant
    Filed: September 8, 2017
    Date of Patent: May 12, 2020
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Kazuaki Okamoto, Yoshihiko Fuji, Yoshihiro Higashi, Michiko Hara, Shiori Kaji
  • Patent number: 10256036
    Abstract: A system includes a circuit board, an inductor including windings mounted on the circuit board, and a plurality of magnetic field containment devices. Each magnetic field containment device includes an independent electrical circuit that is not directly electrically connected via a conductor to any other magnetic field containment device. Each magnetic field containment device also includes a material of a certain relative permeability. Each magnetic field containment device at least partially surrounds the inductor and, in operation, at least partially contains a magnetic B-Field generated by electrical current in the windings of the inductor. The plurality of magnetic field containment devices, in operation, enables a certain saturation current in the inductor.
    Type: Grant
    Filed: January 12, 2017
    Date of Patent: April 9, 2019
    Assignee: APPLE INC.
    Inventors: Paul A. Martinez, Ming Y. Tsai, Federico P. Centola, Martin Schauer, Cheung-Wei Lam, Jason C. Sauers
  • Patent number: 8578594
    Abstract: A process for fabricating a magnetic recording transducer for use in a data storage system comprises providing a substrate, an underlayer and a first nonmagnetic intermediate layer deposited to a first thickness on and in contact with the underlayer, performing a first scanning polishing on a first section of the first intermediate layer to planarize the first section of the first intermediate layer to a second thickness, providing a main pole in the planarized first section of the first intermediate layer, providing a first pattern of photoresist on and in contact with the first section of the first intermediate layer, the pattern comprising an aperture to define a side shield trench, performing a wet etch to remove at least a portion of the first intermediate layer thereby exposing at least one of the plurality of main pole sides, and depositing side shield material in the side shield trench.
    Type: Grant
    Filed: June 6, 2011
    Date of Patent: November 12, 2013
    Assignee: Western Digital (Fremont), LLC
    Inventors: Ming Jiang, Ronghui Zhou, Guanghong Luo, Masahiro Osugi, Danning Yang
  • Patent number: 8413317
    Abstract: A method and system for fabricating a microelectric device are described. A write pole of an energy assisted magnetic recording head or a capacitor might be fabricated. The method includes depositing a resist film and curing the resist film at a temperature of at least 180 degrees centigrade. A cured resist film capable of supporting a line having an aspect ratio of at least ten is thus provided. A portion of the cured resist film is removed. A remaining portion of the resist film forms the line. An insulating or nonmagnetic layer is deposited after formation of the line. The line is removed to provide a trench in the insulating or nonmagnetic layer. The trench has a height and a width. The height divided by the width corresponds to the aspect ratio. At least part of the structure is provided in the trench.
    Type: Grant
    Filed: November 12, 2010
    Date of Patent: April 9, 2013
    Assignee: Western Digital (Fremont), LLC
    Inventors: Dujiang Wan, Hai Sun, Ge Yi, Wei Gao, Hong Zhang, Guanghong Luo, Yunjun Tang, Tiffany Yun Wen Jiang, Zhigang Zhou, Wencheng Su
  • Patent number: 8404128
    Abstract: A method and system for providing a magnetic recording transducer having a pole are disclosed. The pole has side(s), a bottom, and a top wider than the bottom. The method and system include providing at least one side gap layer that covers the side(s) and the top of the pole. At least one sacrificial layer is provided on the side gap layer(s). The sacrificial layer(s) are wet etchable and cover the side gap layer(s). The magnetic recording transducer is planarized after the sacrificial layer(s) are provided. Thus, a portion of the side gap and sacrificial layer(s) is removed. A remaining portion of the sacrificial layer(s) is thus left. The method and system also include wet etching the sacrificial layer(s) to remove the remaining portion of the sacrificial layer(s). A wrap around shield is provided after the remaining portion of the sacrificial layer(s) is removed.
    Type: Grant
    Filed: February 23, 2009
    Date of Patent: March 26, 2013
    Assignee: Western Digital (Fremont), LLC
    Inventors: Hong Zhang, Ge Yi, Lei Wang, Dujiang Wan, Guanghong Luo, Xiaohai Xiang
  • Patent number: 8230583
    Abstract: A method for self aligning a lapping guide with a structure of a write pole. A write pole is formed over a substrate and an electrically conductive material lapping guide material is deposited in a location that is removed from the write pole. A mask is then formed over a portion of the write pole and a portion of the electrically conductive material. A material removal process such as reactive ion etching can then be performed to remove a portion of the magnetic material that is not protected by the mask structure. An magnetic material is then electroplated over the write pole with the write pole, with the mask still in place. In this way, the electroplated material has an edge that is self aligned with an edge of the electrically conductive lapping guide material, both being defined by the same mask structure.
    Type: Grant
    Filed: December 23, 2009
    Date of Patent: July 31, 2012
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventor: Jeffrey S. Lille
  • Publication number: 20120106002
    Abstract: Magnetic write heads and corresponding fabrication methods for bi-layer wrap around shields resulting in dissimilar shield layer widths are disclosed. A gap structure is formed around a main write pole for a magnetic write head. A wrap around shield for the main write pole is fabricated to include a first magnetic layer proximate to the main write pole and a second magnetic layer on the first magnetic layer. A width of the first magnetic layer is less than the width of the second magnetic layer, and back edges of the first and second magnetic layers are coplanar. Further, a throat height of the wrap around shield is maintained between the first and the second magnetic layers because their back edges are coplanar.
    Type: Application
    Filed: October 28, 2010
    Publication date: May 3, 2012
    Inventors: Yimin Hsu, Aron Pentek, Thomas Roucoux, Jing Zhang, Honglin Zhu
  • Patent number: 7616403
    Abstract: Embodiments of the present invention are directed to structures of a recording head having a winged design for reducing corner stray magnetic fields. In one embodiment, the present invention comprises a magnetic recording head comprising a plurality of components. In embodiments of the present invention at least one of the plurality of components comprises a surface exposed to an air bearing surface when in operation with a recording medium. The surface exposed to the air bearing surface comprises notched edges for constraining corner stray magnetic fields associated therewith.
    Type: Grant
    Filed: October 29, 2004
    Date of Patent: November 10, 2009
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Kuok San Ho, Yimin Hsu, Masafumi Mochizuki, Ching Hwa Tsang, Roger Wood
  • Patent number: 7522380
    Abstract: A transducer for magnetically reading and writing information is disclosed. The present invention eases the intricate process of wafer thin film deposition and bar lapping by proposing a transducer including a first and second member, both of which perform the reading and writing function of the transducer. The present invention provides a transducer with greatly improved magnetic efficiency by probing the media magnetization directly. The structure is inherently stable due to shape anisotropy of the members and the closure of magnetic flux at the ends of each member.
    Type: Grant
    Filed: June 14, 2005
    Date of Patent: April 21, 2009
    Assignee: Seagate Technology LLC
    Inventor: Dian Song
  • Publication number: 20090086370
    Abstract: A thin-film magnetic head structure has a configuration adapted to manufacture a thin-film magnetic head configured such that a main magnetic pole layer including a magnetic pole tip on a side of a medium-opposing surface opposing a recording medium, a write shield layer opposing the magnetic pole tip so as to form a recording gap layer on the medium-opposing surface side, and a thin-film coil wound about the write shield layer or main magnetic pole layer are laminated. The magnetic pole tip of the main magnetic pole layer includes an even width portion having a substantially even width along an extending direction.
    Type: Application
    Filed: September 22, 2008
    Publication date: April 2, 2009
    Applicant: Headway Technologies, Inc.
    Inventors: Yoshitaka Sasaki, Hironori Araki, Hiroyuki Ito
  • Patent number: 7384327
    Abstract: A method is presented for grinding a surface of an elongate bar having a plurality of thin film magnetic elements aligned in a line, each of the thin film magnetic elements having a magnetoresistive sensor for reading a magnetic record from a recording medium and an inductive electromagnetic transducer for writing a magnetic record into the recording medium in a stacked structure, the surface of the bar being a grind surface so that it can be formed into an air-bearing surface by means of the grinding. The method has steps of providing first resistive films on the grind surface in advance along a first longitudinal line parallel to a longitudinal direction of the bar, and providing second resistive films on the grind surface in advance along a second longitudinal line parallel to the longitudinal direction of the bar.
    Type: Grant
    Filed: April 26, 2005
    Date of Patent: June 10, 2008
    Assignee: TDK Corporation
    Inventors: Yoshiyuki Mizoguchi, Kazuhide Yamada, Tsuyoshi Umehara, Nobuya Oyama, Soji Koide