Patents by Inventor Keith Y. Sasaki

Keith Y. Sasaki 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: 9245545
    Abstract: A method of forming a single layer inductive coil structure includes forming a first conductive coil on a substrate, forming an insulating layer by atomic layer deposition (ALD) over the first coil and the substrate, and forming one or more additional conductive coils on each of adjacent sides of the first coil insulated from the first coil and the substrate by the insulating layer. A method of forming a stacked layer inductive coil includes forming a cavity in a substrate, forming a first coil in the cavity wherein the cavity has an atomic layer deposition (ALD) layer, forming a second coil in the cavity adjacent to the first coil and separated by the ALD layer from the first coil, forming an insulating layer over the first and second coil, and forming a third coil on the insulating layer.
    Type: Grant
    Filed: May 21, 2013
    Date of Patent: January 26, 2016
    Assignee: Wester Digital (Fremont), LLC
    Inventors: Ut Tran, Yunhe Huang, Keith Y. Sasaki, Curtis V. Macchioni, Zhigang Bai
  • 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: 8449948
    Abstract: A method for providing a structure in a magnetic recording transducer is described. The method includes plating a first layer in a plating bath using a first plurality of plating conditions. The first layer has a first galvanic potential. The method also includes modifying the plating bath and/or the first plurality of plating conditions to provide a modified plating bath and/or a second plurality of plating conditions. The method further includes plating a second layer using the modified plating bath and/or the second plurality of plating conditions. The second layer has a second galvanic potential. The first galvanic potential is between the second galvanic potential and a third galvanic potential of a third layer if the third layer adjoins the first layer. The second galvanic potential is between the first galvanic potential and the third galvanic potential of the third layer if the third layer adjoins the second layer.
    Type: Grant
    Filed: September 10, 2009
    Date of Patent: May 28, 2013
    Assignee: Western Digital (Fremont), LLC
    Inventors: Jose Antonio Medina, Keith Y. Sasaki
  • Patent number: 8091210
    Abstract: A method provides a structure in a magnetic recording transducer. The structure resides on an underlayer. The method includes providing a protective layer and providing layer(s) for the structure. The protective layer covers a field region but exposes a device region in which the structure is to reside. A first portion of the layer(s) reside in the device region, while a second portion of the layer(s) reside in the field region. The method also includes removing the second portion of the layer(s) using an over-removal condition. The underlayer is covered by a remaining portion of the protective layer after the removing step is completed. The method also includes removing the remaining portion of the protective layer. An underlayer removal rate is substantially less than a protective layer during the step of removing of the protective layer.
    Type: Grant
    Filed: March 5, 2008
    Date of Patent: January 10, 2012
    Assignee: Western Digital (Fremont), LLC
    Inventors: Keith Y. Sasaki, Christopher T. Ngo
  • Publication number: 20110056839
    Abstract: A method for providing a structure in a magnetic recording transducer is described. The method includes plating a first layer in a plating bath using a first plurality of plating conditions. The first layer has a first galvanic potential. The method also includes modifying the plating bath and/or the first plurality of plating conditions to provide a modified plating bath and/or a second plurality of plating conditions. The method further includes plating a second layer using the modified plating bath and/or the second plurality of plating conditions. The second layer has a second galvanic potential. The first galvanic potential is between the second galvanic potential and a third galvanic potential of a third layer if the third layer adjoins the first layer. The second galvanic potential is between the first galvanic potential and the third galvanic potential of the third layer if the third layer adjoins the second layer.
    Type: Application
    Filed: September 10, 2009
    Publication date: March 10, 2011
    Applicant: WESTERN DIGITAL (FREMONT), LLC
    Inventors: JOSE ANTONIO MEDINA, KEITH Y. SASAKI