Depositing Ferromagnetic Coating Or Coating Ferromagnetic Substrate Patents (Class 205/119)
  • Patent number: 9972436
    Abstract: The manufacture method of a coil component includes the steps of bonding a dummy metal layer onto one face of a mounting base, stacking a base insulating resin on the dummy metal layer, stacking a first spiral wiring and a first insulating resin in this order on the base insulating resin to cover the first spiral wiring with the first insulating resin and stacking a second spiral wiring and a second insulating resin in this order on the first insulating resin to cover the second spiral wiring with the second insulating resin to thereby form a coil substrate, detaching the mounting base from the dummy metal layer in a bonding face between the one face of the mounting base and the dummy metal layer, removing the dummy metal layer from the coil substrate, and covering the coil substrate with a magnetic resin.
    Type: Grant
    Filed: June 13, 2016
    Date of Patent: May 15, 2018
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Akinori Hamada, Kenji Nishiyama, Shinji Yasuda
  • Patent number: 9966178
    Abstract: Chip electronic component and manufacturing method thereof disclosed. An example aspect provides a chip electronic component. The chip electronic component includes a magnetic body including a magnetic material, a coil part embedded in the magnetic body and formed to be connected to a first coil conductor and a second coil conductor, an insulating layer covering the first coil conductor and the second coil conductor, and a magnetic layer formed on the insulating layer.
    Type: Grant
    Filed: February 22, 2016
    Date of Patent: May 8, 2018
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Youn-Soo Seo, Myung-Sam Kang, Jin-Soo Kim, Young-Gwan Ko, Woon-Chul Choi, In-Seok Kim, Hye-Yeon Cha
  • Patent number: 9466325
    Abstract: Provided herein are apparatuses and methods related to creating a patterned resist layer on a substrate; selectively treating at least a resist-contacting layer of the substrate in contact with the patterned resist layer to create a patterned growth guiding mechanism and growing patterned magnetic features guided by the patterned growth guiding mechanism.
    Type: Grant
    Filed: June 18, 2014
    Date of Patent: October 11, 2016
    Assignee: Seagate Technology LLC
    Inventors: Thomas P. Nolan, Kim Y. Lee, Shuaigang Xiao, Tom Chang, Yingguo Peng
  • Patent number: 9053735
    Abstract: A method fabricates a magnetic transducer having air-bearing surface (ABS) location and an intermediate layer having a trench therein. The trench has a shape and location corresponding to a main pole. The method includes depositing at least one main pole layer. A portion of the main pole layer(s) is in the trench. A refill layer is provided on the main pole layer(s). The main pole layer(s) may not be patterned after being provided and before the refill layer is provided. At least the refill layer is planarized. A full-film metal planarization is performed for at least one of the refill layer and the at least one main pole layer. The full-film metal planarization may include a bulk ion mill and/or ion beam scan.
    Type: Grant
    Filed: June 20, 2014
    Date of Patent: June 9, 2015
    Assignee: Western Digital (Fremont), LLC
    Inventors: Ronghui Zhou, Lily Yao, Masahiro Osugi, Degang Cheng, Ming Jiang
  • Publication number: 20150137904
    Abstract: Provided herein is a microwave device using a magnetic material nano wire array and a manufacturing method thereof, the device including a template having a nano hole array filled with a metal magnetic material.
    Type: Application
    Filed: October 20, 2014
    Publication date: May 21, 2015
    Inventors: Yark Yeon KIM, Han Young YU, Yong Sun YOON, Won Ick JANG
  • Publication number: 20150077209
    Abstract: A wiring board includes a first insulating layer; and a coil formed on the first insulating layer and including a first magnetic layer formed on the first insulating layer and formed by a plating layer, a coil portion formed on the first magnetic layer, a second insulating layer formed on the first insulating layer to cover the first magnetic layer and the coil portion, and a second magnetic layer formed on the second insulating layer and formed by a plating layer.
    Type: Application
    Filed: August 27, 2014
    Publication date: March 19, 2015
    Inventor: Tomoharu FUJII
  • Patent number: 8980076
    Abstract: A method of fabricating a magnetic recording disk including providing a magnetic recording layer having a pattern of raised areas and recessed areas formed thereon and providing a mask layer on the raised areas of the magnetic recording layer. The method further including electrodepositing a first protection layer on the magnetic recording layer, removing the mask layer, and depositing a second protection layer above the first protection layer.
    Type: Grant
    Filed: January 11, 2013
    Date of Patent: March 17, 2015
    Assignee: WD Media, LLC
    Inventors: Andrew Homola, Chunbin Zhang, Paul C. Dorsey, David Treves
  • Patent number: 8881377
    Abstract: A method for determining a critical dimension of a structure along a plane of interest from a measurement along a test plane that is not necessarily located at the plane of interest. The method involves slicing a structure along a test plane and measuring a marker feature in this test plane. A determination of a critical dimension of a feature at the plane of interest is then determined based on the measurement of the marker feature measurement at the test plane. This testing methodology can be useful, for example in the measurement of a critical dimension of a write pole at an air bearing surface plane form a measurement of a test feature at a plane that is not necessarily located at the air bearing surface plane.
    Type: Grant
    Filed: December 21, 2010
    Date of Patent: November 11, 2014
    Assignee: HGST Netherlands B.V.
    Inventor: Chester X. Chien
  • Publication number: 20140251816
    Abstract: A method for making a magnet rotor assembly part by providing a bonded metal part having a determinable crush strength, impregnating the bonded metal part with a curable resin and curing the resin so that the crush strength of the assembly part is increased above the determinable crush strength both initially and after extended exposure to temperatures of at least 160° C. Improved crush strength in the magnet sleeve and in other bonded metal parts, both initially and after exposure to high temperatures is accomplished by impregnating the parts with a curable resin.
    Type: Application
    Filed: May 7, 2014
    Publication date: September 11, 2014
    Inventors: Stanley Byron Musselman, Edward E. Welker, Mitchell L. Spencer, Viswanathan Panchanathan
  • Patent number: 8808524
    Abstract: A method is described for forming a magnetic recording head substrate. The method includes utilizing a metal feature on the magnetic recording head substrate as a grounding path. The magnetic recording head substrate is submerged in a solution containing ions of a second material, and the ions of the second material are electrodeposited on the magnetic recording head substrate.
    Type: Grant
    Filed: January 27, 2009
    Date of Patent: August 19, 2014
    Assignee: Seagate Technology LLC
    Inventors: David Christopher Seets, James Keith Price, Mary Elizabeth Leamont, Ibro Tabakovic, Steven Carl Riemer, Tracy Charles Baresh
  • Patent number: 8677604
    Abstract: A method of manufacturing a boundary acoustic wave device includes the steps of forming an electrode on a first medium layer, forming a second medium layer so as to cover the electrode on the first medium layer, and forming a sound absorbing layer on an external surface of the second medium layer. The sound absorbing layer has an acoustic velocity of transverse waves that is lower than an acoustic velocity of transverse waves of the second medium layer.
    Type: Grant
    Filed: January 28, 2013
    Date of Patent: March 25, 2014
    Assignee: Murata Manufacturing Co., Ltd.
    Inventor: Hajime Kando
  • Publication number: 20140069816
    Abstract: Disclosed herein are a nickel plating solution and a method for forming a nickel layer on an external electrode of a chip component by using the nickel plating solution, the nickel plating solution including: a nickel ion; a chloride ion; and a pH buffer, wherein the pH buffer is used by mixing an inorganic acid, and an organic acid and a salt thereof, so that the damage to a body of the chip component can be reduced by containing organic acid and a salt thereof in the nickel plating solution for forming the nickel plating layer on the external electrode of the chip component having a body formed of a material including ferrite or manganese oxide.
    Type: Application
    Filed: March 14, 2013
    Publication date: March 13, 2014
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Mi Geum KIM, Hyo Seung NAM
  • Patent number: 8670211
    Abstract: A method and system plates CoFeX, where X is an insertion metal. The method and system include providing a plating solution including hydroxymethyl-p-tolylsulfone (HPT). The plating solution being configured to provide a CoFeX film having a high saturation magnetic flux density of greater than 2.3 Tesla and not more than 3 weight percent of X. The method and system also include plating the CoFeX film on a substrate in the plating solution. In some aspects, the plated CoFeX film may be used in structures such as main poles of a magnetic recording head.
    Type: Grant
    Filed: June 21, 2011
    Date of Patent: March 11, 2014
    Assignee: Western Digital (Fremont), LLC
    Inventors: Ming Sun, Jose A. Medina, Keith Y. Sasaki, Ming Jiang
  • Patent number: 8621744
    Abstract: A method of manufacturing an inductor for a microelectronic device comprises providing a substrate (610), forming a first plurality of inductor windings (111, 211, 411, 620, 2030) over the substrate, forming a magnetic inductor core (112, 212, 412, 810) over the first plurality of inductor windings, and forming a second plurality of inductor windings (113, 213, 413, 1010) over the magnetic inductor core. In another embodiment, the method comprises forming the inductor on a sacrificial substrate (1610) such that the inductor can subsequently be mounted onto a carrier tape (1810). In yet another embodiment, a method of manufacturing a substrate for a microelectronic device comprises forming an inductor within a build-up layer (101, 102, 103, 104) of a substrate.
    Type: Grant
    Filed: August 23, 2011
    Date of Patent: January 7, 2014
    Assignee: Intel Corporation
    Inventors: Aleksandar Aleksov, Gloria Alejandra Camacho-Bragado
  • Patent number: 8595917
    Abstract: A flexure 11 has a substrate 13 made of a thin conductive metal plate, a base insulating layer 31 made of flexible resin formed on the substrate, wiring patterns 15 formed on the base insulating layer and connected to a slider mount 17, and a cover insulating layer 33 formed over the wiring patterns. The flexure 11 is substantially coated with a conductive polymer layer 39 having a thickness in the range of 18 to 130 nm. The flexure 11 prevents electrostatic accumulation and ion migration that are trade-offs.
    Type: Grant
    Filed: May 24, 2012
    Date of Patent: December 3, 2013
    Assignee: NHK Spring Co., Ltd.
    Inventors: Hajime Arai, Eijiro Furuta, Koichi Kusakawa
  • Patent number: 8574729
    Abstract: A magnetic structure includes a first magnetic layer, a nonmagnetic insulating layer, a nonmagnetic adhesion layer disposed on the top surfaces of the first magnetic layer and the nonmagnetic insulating layer, and a second magnetic layer disposed on the nonmagnetic adhesion layer. The nonmagnetic insulating layer contains an oxygen atom. The nonmagnetic adhesion layer is composed of one element or a plurality of elements selected from the group consisting of Al, Si and nonmagnetic transition metal elements except Ru, and the bond enthalpy of a diatomic molecule composed of an atom of the one element or each of the plurality of elements and an oxygen atom is 400 kJ/mol or higher. The nonmagnetic adhesion layer has a thickness within a range of 0.3 to 0.8 nm. The first magnetic layer and the second magnetic layer are ferromagnetically coupled to each other.
    Type: Grant
    Filed: April 23, 2008
    Date of Patent: November 5, 2013
    Assignee: TDK Corporation
    Inventors: Kenzo Makino, Masashi Sano, Atsushi Yamaguchi
  • Patent number: 8535508
    Abstract: A coating method for forming a pattern on a workpiece is provided. First, a workpiece surface is provided. Second, a mask having a shape conforming to a predetermined pattern is provided. Next, the workpiece surface includes a first portion exposed outside and a second portion shielded by the mask. A shielding layer is formed on the exposed first portion of the workpiece surface. The mask is removed from the workpiece to expose the second portion. A coating layer over the shielding layer and the exposed second portion is formed. The coating layer consists of a first part overlaying the shielding layer and a second part overlaying the second portion. The mask is attached onto the coating layer and aligned with the second portion of the workpiece surface. The first part of the coating layer, the shielding layer, and the mask are then removed.
    Type: Grant
    Filed: December 23, 2010
    Date of Patent: September 17, 2013
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventor: Chung-Pei Wang
  • Patent number: 8443511
    Abstract: A scalable MEMS inductor is formed on the top surface of a semiconductor die. The MEMS inductor includes a plurality of magnetic lower laminations, a circular trace that lies over and spaced apart from the magnetic lower laminations, and a plurality of upper laminations that lie over and spaced apart from the circular trace.
    Type: Grant
    Filed: September 22, 2011
    Date of Patent: May 21, 2013
    Assignee: National Semiconductor Corporation
    Inventors: Peter Smeys, Peter Johnson
  • Patent number: 8435399
    Abstract: A method is disclosed for defining discrete magnetic and non-magnetic regions on the magnetic film layer of a storage media substrate. The method applies anodic oxidation of a cobalt-containing magnetic film layer to remove cobalt, followed by controlled deposition of a non-magnetic matrix into the regions where the cobalt has been removed. Deposition may either be electrodeposition, collimated vacuum deposition, or other methods depending upon the composition of the non-magnetic matrix being deposited. The method may be performed in a single electrochemical cell.
    Type: Grant
    Filed: January 11, 2010
    Date of Patent: May 7, 2013
    Assignee: Seagate Technology LLC
    Inventors: Ibro Takakovic, Steve Riemer, Jie Gong, Mark Thomas Kief, Ming Sun
  • Publication number: 20130022840
    Abstract: A method for manufacturing a magnetic write head having a write pole with a tapered leading edge formed on a substrate having a tapered surface and a wrap-around, trailing magnetic shield. The method uses a multi-layer anti-reflective coating prior to formation of the shield so that reflection from the tapered surface of the substrate does not affect the lithography of the mask used to form the trailing shield. The multi-layer antireflective coating is constructed of materials that can be left in the finished head, thereby eliminating problems associated with removal of the anti-reflective coating.
    Type: Application
    Filed: July 20, 2011
    Publication date: January 24, 2013
    Applicant: Hitachi Global Storage Technologies Netherlands B. V.
    Inventors: Wen-Chien D. Hsiao, Ning Shi, Yi Zheng
  • Patent number: 8273233
    Abstract: A method of forming a write pole in a PMR head is disclosed that involves forming an opening in a mold forming layer. A conformal Ru seed layer is formed within the opening and on a top surface. An auxiliary layer made of CoFeNi or alloys thereof is formed as a conformal layer on the seed layer. All or part of the auxiliary layer is removed in an electroplating solution by applying a (?) current or voltage during an activation step that is controlled by activation time. Thereafter, a magnetic material is electroplated with a (+) current to fill the opening and preferably has the same CoFeNi composition as the auxiliary layer. The method avoids Ru oxidation that causes poor adhesion to CoFeNi, and elevated surfactant levels that lead to write pole impurities. Voids in the plated material are significantly reduced by forming a seed layer surface with improved wettability.
    Type: Grant
    Filed: July 17, 2009
    Date of Patent: September 25, 2012
    Assignee: Headway Technologies, Inc.
    Inventors: Chao-Peng Chen, Jas Chudasama, Situan Lam, Chien-Li Lin
  • Publication number: 20120211467
    Abstract: Among other things, methods, systems and apparatus are described for implementing nanomotor-based micro- and nanofabrication. In one aspect, a method of fabricating nanoobjects comprises functionalizing a nanomotor with a reagent. The method also includes controlling a movement of the functionalized nanomotor in a solution containing material to react with the reagent to induce a localized deposition or precipitation of a product onto a surface of a substrate or etching of the substrate.
    Type: Application
    Filed: August 24, 2010
    Publication date: August 23, 2012
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Joseph Wang, Kalayil Manian Manesh, Shankar Balasubramanian
  • Patent number: 8191238
    Abstract: A magnetic writer comprises a write pole, a substrate and a non-magnetic, oxygen-free buffer material. The write pole has a leading edge, a trailing edge, a first side and second side. The substrate is at the leading edge of the write pole. The non-magnetic, oxygen-free buffer material is located between the write pole and the substrate.
    Type: Grant
    Filed: June 22, 2009
    Date of Patent: June 5, 2012
    Assignee: Seagate Technology LLC
    Inventors: Alexandre Vasilievish Demtchouk, Thomas Roy Boonstra, Michael Christopher Kautzky
  • Patent number: 8177955
    Abstract: A magnetic layer that may serve as a top pole layer and bottom pole layer in a magnetic write head is disclosed. The magnetic layer has a composition represented by FeWCoXNiYVZ in which w, x, y, and z are the atomic % of Fe, Co, Ni, and V, respectively, and where w is between about 60 and 85, x is between about 10 and 30, y is between 0 and about 20, z is between about 0.1 and 3, and wherein w+x+y+z=100. An electroplating process having a plating current density of 3 to 30 mA/cm2 is used to deposit the magnetic layer and involves an electrolyte solution with a small amount of VOSO4 which is the V source. The resulting magnetic layer has a magnetic saturation flux density BS greater than 1.9 Telsa and a resistivity ? higher than 70 ?ohms-cm.
    Type: Grant
    Filed: June 3, 2004
    Date of Patent: May 15, 2012
    Assignee: Headway Technologies, Inc.
    Inventors: Feiyue Li, Xiaomin Liu
  • Patent number: 8168045
    Abstract: An apparatus for plating a magnetic film on a substrate includes: a track including a plurality of stopping points along the track; a permanent magnet placed on the track such that the permanent magnet can be moved along the track towards and away from the stopping points; at least one plating tank positioned on the stopping point; and a removable high permeability iron flux concentrator inserted into gaps between the substrate and inside walls of the plating tank, substantially surrounding the substrate and extending around and under the substrate.
    Type: Grant
    Filed: May 20, 2011
    Date of Patent: May 1, 2012
    Assignee: International Business Corporation
    Inventors: Matteo Flotta, Lubomyr T. Romanikiw, Xiaoyan Shao, Steven Erik Steen, Bucknell Chapman Webb
  • Patent number: 8161626
    Abstract: A suspension for supporting a magnetic head is provided with a load beam formed of a thin-plate spring. A recess for accommodating a damper is formed in the load beam. The damper is affixed to a bottom surface of the recess.
    Type: Grant
    Filed: February 12, 2010
    Date of Patent: April 24, 2012
    Assignee: NHK Spring Co., Ltd.
    Inventor: Yoichi Ikeji
  • Patent number: 8117743
    Abstract: A method includes providing a voltage switchable dielectric material having a characteristic voltage, exposing the voltage switchable dielectric material to a source of ions associated with an electrically conductive material, and creating a voltage difference between the source and the voltage switchable dielectric material that is greater than the characteristic voltage. Electrical current is allowed to flow from the voltage switchable dielectric material, and the electrically conductive material is deposited on the voltage switchable dielectric material. A body comprises a voltage switchable dielectric material and a conductive material deposited on the voltage switchable dielectric material using an electrochemical process. In some cases, the conductive material is deposited using electroplating.
    Type: Grant
    Filed: November 23, 2010
    Date of Patent: February 21, 2012
    Assignee: Shocking Technologies, Inc.
    Inventor: Lex Kosowsky
  • Patent number: 8110085
    Abstract: A method for forming a magnetic write head using a damascene process that does not form voids in the magnetic structure. An opening is formed in an alumina layer, the opening being configured to define a trench. Then a first layer of magnetic material is deposited into the trench. A CMP process is then performed to remove any voids that have formed in the first magnetic layer. Then a second layer of magnetic material is deposited over the first layer of magnetic material. In another embodiment of the invention, a opening is formed in the alumina layer, and a first layer of magnetic material is electroplated into the opening. A thin layer of non-magnetic material is then deposited, and a second layer of magnetic material is deposited over the thin layer of non-magnetic material. The thin layer of alumina advantageously provides a laminate structure that avoids data erasure.
    Type: Grant
    Filed: December 30, 2008
    Date of Patent: February 7, 2012
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Wen-Chien David Hsiao, Yinshi Liu, Yi Zheng
  • Patent number: 8082656
    Abstract: A method for manufacturing a disk drive head suspension having a plated load point dimple. A photoresist mask having an opening with load point-defining side walls and a load point diameter is formed over a planar portion of a spring metal member. Metal is plated onto the spring metal member in the opening to form a load point having the load point diameter on the planar portion of the spring metal member.
    Type: Grant
    Filed: September 4, 2007
    Date of Patent: December 27, 2011
    Assignee: Hutchinson Technology Incorporated
    Inventors: Zachary A. Pokornowski, Michael W. Davis
  • Patent number: 8074341
    Abstract: A method for manufacturing a boundary acoustic wave device includes the steps of preparing a laminated structure in which an IDT electrode is disposed at an interface between first and second solid media and reforming the first medium and/or the second medium by externally providing the laminated structure with energy capable of reaching the inside of the first medium and/or the second medium and thus adjusting a frequency of the boundary acoustic wave device. The above provides a boundary acoustic wave device manufacturing method that enables frequency adjustment to be readily performed with high accuracy.
    Type: Grant
    Filed: April 24, 2009
    Date of Patent: December 13, 2011
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Hajime Kando, Masakazu Mimura
  • Patent number: 8070929
    Abstract: Techniques for forming metal catalyst particles on a metal tip, and nanostructures on a metal tip are provided.
    Type: Grant
    Filed: August 21, 2008
    Date of Patent: December 6, 2011
    Assignee: SNU R&DB Foundation
    Inventors: Yong Hyup Kim, Wal Jun Kim
  • Patent number: 8051552
    Abstract: A wrap around shield of a write head is fabricated in multiple processes, with side shields fabricated in one process, and a trailing shield formed in another process. These multiple processes form a stitched wrap around shield, resulting in more flexible and accurate placement of the trailing shield and side shields with respect to the write pole. These processes also independently form the dimensions (shapes and sizes) of the side shields and the trailing shield which allows better control of writeability, saturation, and adjacent track interference of the perpendicular recording write head.
    Type: Grant
    Filed: May 11, 2007
    Date of Patent: November 8, 2011
    Assignee: Hitachi Global Storage Technologies Netherlands, B.V.
    Inventors: Ming Jiang, Yi Zheng
  • Patent number: 8048281
    Abstract: Methods for fabricating thin film magnetic head coil structures are disclosed. The methods disclose deposition of a first thick seed layer, followed by deposition of an ultra-thin second seed layer. Coil structures having sub-micron pitch and high aspect ratios are deposited on the second ultra-thin seed layer, which is removed from between the coil windings via an isotropic etch process such as wet etching or RIE. Subsequent to selective removal of the ultra-thin second seed layer, the first thick seed layer is utilized to deposit pole and backgap structures, eliminating the need to deposit (and remove) a subsequent seed layer on the coil structure.
    Type: Grant
    Filed: October 2, 2008
    Date of Patent: November 1, 2011
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Christian Rene Bonhote, Quang Le, Ihavin Sinha
  • Patent number: 7950137
    Abstract: A method for manufacturing a write pole for perpendicular magnetic recording for accurately defining a side shield throat height and write pole flare point. The magnetic structure includes a write pole portion and first and second side shield portions. The side shields portions are magnetically connected with the write pole portion in a region in front of an intended air bearing surface plane (e.g. in the direction from which lapping will progress). The side shields portions are each separated from the write pole portion in a region behind the intended air bearing surface plane by notches that terminate at a desired location relative to the intended air bearing surface plane and which open up in a region behind the intended air bearing surface plane.
    Type: Grant
    Filed: June 21, 2007
    Date of Patent: May 31, 2011
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Christian Rene Bonhote, Thomas Dudley Boon, Jr., Ming Jiang, Jordan Asher Katine, Quang Le, Yinshi Liu, Xhavin Sinha, Sue Siyang Zhang, Yi Zheng
  • Patent number: 7935621
    Abstract: Disclosed are embodiments of a circuit and method for electroplating a feature (e.g., a BEOL anti-fuse device) onto a wafer. The embodiments eliminate the use of a seed layer and, thereby, minimize subsequent processing steps (e.g., etching or chemical mechanical polishing (CMP)). Specifically, the embodiments allow for selective electroplating metal or alloy materials onto an exposed portion of a metal layer in a trench on the front side of a substrate. This is accomplished by providing a unique wafer structure that allows a current path to be established from a power supply through a back side contact and in-substrate electrical connector to the metal layer. During electrodeposition, current flow through the current path can be selectively controlled. Additionally, if the electroplated feature is an anti-fuse device, current flow through this current path can also be selectively controlled in order to program the anti-fuse device.
    Type: Grant
    Filed: February 15, 2008
    Date of Patent: May 3, 2011
    Assignee: International Business Machines Corporation
    Inventors: Veeraraghavan S. Basker, Toshiharu Furukawa, William R. Tonti
  • Patent number: 7891077
    Abstract: A method of preparing a polymer actuator includes providing an ionic conductive polymer membrane; forming first and second metal electrodes respectively over first and second surfaces of the ionic conductive polymer membrane; substituting water used in the formation of the first and second metal electrodes with an ionic liquid stable to an electrolysis; and coating the first and second surfaces of the metal electrodes with a coating material.
    Type: Grant
    Filed: July 24, 2008
    Date of Patent: February 22, 2011
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Hyung Kun Lee, Nak Jin Choi, Kang Ho Park, Jong Dae Kim
  • Patent number: 7870660
    Abstract: A magnetic head includes: an encasing layer made of a nonmagnetic material and having a groove that opens in the top surface; a nonmagnetic metal layer made of a nonmagnetic metal material, disposed on the top surface of the encasing layer, and having a penetrating opening that is contiguous to the groove; and a pole layer made of a magnetic metal material and encased in the groove of the encasing layer and in the opening of the nonmagnetic metal layer. The pole layer has an end face located in a medium facing surface, the end face having a first portion and a second portion that is located farther from a substrate than the first portion and connected to the first portion. The first portion has a width that decreases as the distance from the substrate decreases. The second portion has a uniform width that defines the track width. In the medium facing surface, the nonmagnetic metal layer exists on both sides of the second portion, the sides being opposed to each other in the direction of track width.
    Type: Grant
    Filed: February 11, 2009
    Date of Patent: January 18, 2011
    Assignee: Headway Technologies, Inc.
    Inventors: Yoshitaka Sasaki, Hiroyuki Itoh, Hironori Araki, Takehiro Horinaka, Shigeki Tanemura
  • Patent number: 7870659
    Abstract: A method for defining a perpendicular magnetic head is provided. The method includes forming a portion of the read and write head including depositing a sensor film on a surface only over a region of the read head to form a sensor; depositing a full-film shaping pole layer over the write head; defining a track width of the sensor; patterning a photoresist to define a pole tip of the write head including write track width and flare position, and at the same time to define a back edge of the sensor; removing material of the sensor and pole tip from the areas not covered by the photoresist; completing the fabrication of the write and read head layers; and lapping the write pole concurrently with the sensor to define the flare position of the pole tip and to define a sensor height with accurate positioning of write head flare.
    Type: Grant
    Filed: September 7, 2007
    Date of Patent: January 18, 2011
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Vladimir Nikitin, Samuel Wei-san Yuan
  • Publication number: 20100300884
    Abstract: A method of fabricating a patterned magnetic recording disk is described. The method may include electrodepositing a protection layer on the magnetic recording layer of the disk.
    Type: Application
    Filed: May 26, 2009
    Publication date: December 2, 2010
    Applicant: WD MEDIA, INC.
    Inventors: ANDREW HOMOLA, CHUNBIN ZHANG, PAUL C. DORSEY, DAVID TREVES
  • Patent number: 7841067
    Abstract: A method for forming a head having a trailing shield that includes forming a gap layer above a pole, forming a mask above the gap layer, and forming a trailing shield above the gap layer and adjacent the mask, a throat height of the trailing shield being defined between the mask.
    Type: Grant
    Filed: February 26, 2007
    Date of Patent: November 30, 2010
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventor: Jeffrey S. Lille
  • Patent number: 7770285
    Abstract: A magnetic read/write head is produced with an insert layer between the substrate and the magnetic transducer. The insert layer has a lower coefficient of thermal expansion than the substrate, which reduces the temperature pole tip recession (T-PTR) of the head because the insert layer is an intervening layer between the substrate and magnetic transducer. The insert layer is produced by plating, e.g., an Invar layer over the substrate prior to fabricating the magnetic transducer. The Invar layer is annealed and the structure planarized prior to depositing a non-magnetic gap layer followed by the fabrication of the magnetic transducer.
    Type: Grant
    Filed: March 28, 2008
    Date of Patent: August 10, 2010
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Christian R. Bonhote, Malika D. Carter, David A. Dudek, Wen-Chien D. Hsiao, John W. Lam, Vladimir Nikitin
  • Patent number: 7721415
    Abstract: A thin-film magnetic head is manufactured as follows. First, a base insulating layer having a magnetic pole forming depression sunken into a form corresponding to the main magnetic pole layer is formed, a stop film for CMP is formed such as to fill the magnetic pole forming depression, and then a magnetic layer is formed on the stop film. Next, the magnetic layer is separated by forming a separation groove substantially surrounding the magnetic pole forming depression on the outside thereof, and thus separated magnetic layer is formed with a cover insulating film adapted to cover the whole upper face. The surface is polished by CMP until the stop film is exposed, so that the part of magnetic layer remaining on the inside of the magnetic pole forming depression is used as the main magnetic pole layer. Further, a recording gap layer, a write shield layer, and a thin-film coil are formed.
    Type: Grant
    Filed: April 19, 2006
    Date of Patent: May 25, 2010
    Assignees: Headway Technologies, Inc, SAE Magnetics (H.K.) Ltd.
    Inventors: Yoshitaka Sasaki, Hiroyuki Ito, Takehiro Horinaka, Takehiro Kamigama, Tatsushi Shimizu
  • Patent number: 7716814
    Abstract: Components of a plurality of magnetic heads are formed on a single substrate to fabricate a magnetic head substructure in which a plurality of pre-head portions are aligned in a plurality of rows. The substructure is cut to separate the plurality of pre-head portions from one another, and the plurality of magnetic heads are thereby fabricated. The surface formed by cutting the substructure is lapped to form a lapped surface. The lapped surface is lapped so as to reach a target position of a medium facing surface. The substructure incorporates first to fourth resistor elements each of which detects the position of the lapped surface. The third and fourth detection elements are located at positions shifted from the first and second resistor elements along the direction orthogonal to the medium facing surface.
    Type: Grant
    Filed: February 5, 2007
    Date of Patent: May 18, 2010
    Assignees: Headway Technologies, Inc., SAE Magnetics (H.K.) Ltd.
    Inventors: Yoshitaka Sasaki, Hiroyuki Itoh, Kazuo Ishizaki, Ryuji Fujii, Tatsushi Shimizu
  • Patent number: 7641783
    Abstract: A stable FePt plating solution is provided. Further, a process for electroplating is provided for producing an FePt magnetic material having an especially strong coercive force and excellent properties by using the plating solution. The plating solution contains ionic Fe, ionic Pt, and a complex agent, at a molar ratio (Fe/Pt) of the ionic Fe to the ionic Pt ranging from 0.75 to 3.
    Type: Grant
    Filed: January 14, 2005
    Date of Patent: January 5, 2010
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shigeru Ichihara, Tohru Den, Nobuhiro Yasui
  • Patent number: 7631417
    Abstract: Methods and structures for the fabrication of perpendicular thin film heads are disclosed. Prior to the deposition of shield structures, seed layers having anti-reflective properties are utilized, eliminating the need to deposit, then remove, traditional inorganic anti-reflection coatings prior to shield plating.
    Type: Grant
    Filed: November 10, 2006
    Date of Patent: December 15, 2009
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Hieu Lam, Patrick Rush Webb, Yi Zheng
  • Publication number: 20090279206
    Abstract: A method for forming a magnetic write pole with a trapezoidal cross-section is described. The method consists of first forming a magnetic seedlayer on a base followed by depositing a removable material layer on the seedlayer, and then a resist layer on the removable material layer. A trench is then formed in the resist, and the resist is heated to cause the cross-sectional profile of the trench to assume a trapezoidal shape. The resist is then capped with another resist layer and further heated to cause the width of the trapezoidal trench to become narrower. The cap layer and removable material layer at the bottom of the trench are then removed and the trench filled with magnetic material by electroplating. The resist and seedlayer external to the trench are finally removed to form a write pole with a trapezoidal cross-section.
    Type: Application
    Filed: May 7, 2008
    Publication date: November 12, 2009
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: XiaoMin Yang, Shuaigang Xiao, Jie Gong, Michael Seigler
  • Patent number: 7596853
    Abstract: The method of manufacturing a thin film magnetic head includes forming a first recessed portion for insulation and a second recessed portion for contact that reach the substrate through the first insulating layer from a side of the first insulating layer of the substrate having the first insulating layer thereon; forming a second insulating layer on the substrate in the first recessed portion; and forming the lower shield layer in the first recessed portion and a contact portion in the second recessed portion.
    Type: Grant
    Filed: December 28, 2006
    Date of Patent: October 6, 2009
    Assignee: TDK Corporation
    Inventors: Kenji Ichinohe, Yosuke Goto
  • Patent number: 7571533
    Abstract: A method of manufacturing a micro flux gate sensor and a micro flux gate sensor manufactured according to the method are provided. The method includes operations of forming a lower coil portion of an excitation coil and a magnetic field detecting coil on a wafer, forming connection portions with a certain height at predetermined positions of the lower coil portion, forming a first insulation layer to cover the lower coil portion and the connection portions, forming a magnetic core on the first insulation layer, forming a second insulation layer to cover the magnetic core and forming an upper coil portion electrically connected to the connection portions to form the excitation coil and the magnetic field detecting coil, and forming a third insulation layer to cover the upper coil portion.
    Type: Grant
    Filed: April 21, 2006
    Date of Patent: August 11, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Kyoung-won Na, Jingli Yuan
  • Patent number: 7569131
    Abstract: A method for multi-layer electrodeposition in a single bath is also provided. A substrate is immersed in a bath. An electrodeposition operation is initiated for depositing a first layer of material on the substrate. The electrodeposition operation includes agitating the bath and applying current pulses. The electrodeposition operation is later altered for depositing a second layer of material on the first layer, where the second layer is of a different composition than the first layer. In the altered mode, the current density is changed for altering a composition of material deposited on the substrate, the duration and/or frequency of the current pulses are altered, and the bath is agitated at a different rate of agitation.
    Type: Grant
    Filed: August 12, 2002
    Date of Patent: August 4, 2009
    Assignee: International Business Machines Corporation
    Inventors: April Dawn Hixon-Goldsmith, Matthew Walter Last, Murali Ramasubramanian, Rolf Beatus Schaefer
  • Publication number: 20090188805
    Abstract: A process for electrodepositing at least one ferromagnetic material into a three dimensional pattern within a substrate is provided. The process comprises providing a substrate material, dielectric or conductor, having a three dimensional recessed pattern in at least one outer surface thereof, dielectric substrate materials also having an electrical conductive seed layer at least within the three dimensional pattern. An electrolytic bath is prepared comprising at least one ferromagnetic material and at least one accelerating, inhibiting, or depolarizing additive. The at least one ferromagnetic material comprises at least one metal cation selected from the group consisting of Ni2+, Co2+, Fe2+, Fe3+, and combinations thereof. The substrate is placed into the electrolytic bath and the electrolytic bath contacts the conducting three dimensional pattern in the substrate or the conducting seed layer within the pattern on a dielectric substrate. A counter electrode is placed into the electrolytic bath.
    Type: Application
    Filed: January 23, 2009
    Publication date: July 30, 2009
    Inventors: Thomas P. Moffat, Chang Hwa Lee, Daniel Jossel, Soo-Kil Kim