Patents by Inventor SY VU

SY VU 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).

  • Seed structure for perpendicular magnetic recording media
    Patent number: 9990940
    Abstract: A data storage medium having a seed structure formed of a first seed layer comprising a nickel alloy NiY, where Y is an element selected from Al, B, Fe, Nb, W, and Co, and a second seed layer represented by NiWAX, where A is an element selected from Al, B, Fe, Nb, and Co, and X is either B, Si, Ti, Nb, V, Cr, Ru, or an oxide, with the second seed layer being disposed on the first seed layer; and a magnetic recording layer above the seed structure. In addition, a method for manufacturing a data storage medium containing the aforementioned seed structure is also disclosed.
    Type: Grant
    Filed: December 30, 2014
    Date of Patent: June 5, 2018
    Assignee: WD Media, LLC
    Inventors: Kyongha Kang, Daehoon Hong, Sy Vu, Chester C. H. Lo
  • STACKED INTERMEDIATE LAYER FOR PERPENDICULAR MAGNETIC RECORDING MEDIA
    Publication number: 20170154647
    Abstract: One aspect of a perpendicular magnetic recording (PMR) media stack includes two intermediate layers, and a spacer layer formed between the two intermediate layers, wherein a surface energy of the spacer layer is lower than a surface energy of the two intermediate layers.
    Type: Application
    Filed: November 30, 2015
    Publication date: June 1, 2017
    Inventors: DAEHOON HONG, SY VU, KYONGHA KANG, MRUGESH DESAI
  • Magnetic seed layer used with an unbalanced soft underlayer
    Patent number: 9431045
    Abstract: A magnetic media is described including a substrate, an unbalanced soft under layer (SUL), a magnetic seed layer, which may consist of one or more of NiWxCoy, NiWxCoyAlz, NiVaCob, NiVaCobAlc, NiWxVaCob, and NiWxVaFeb, and a magnetic recording layer.
    Type: Grant
    Filed: April 24, 2015
    Date of Patent: August 30, 2016
    Assignee: WD MEDIA, LLC
    Inventors: Zhenguo Wang, Iwao Okamoto, Sy Vu, Daehoon Hong
  • Perpendicular recording media with grain isolation initiation layer and exchange breaking layer for signal-to-noise ratio enhancement
    Patent number: 9190094
    Abstract: Aspects of the present invention relate to a perpendicular magnetic recording (PMR) media stack and methods for fabricating the same. The PMR media stack has a novel grain isolation initiation layer (GIIL) and/or a novel exchange-break layer (EBL) that can improve the signal-to-noise performance of the PMR media stack. The PMR media stack includes a substrate, a soft underlayer on the substrate, an interlayer positioned on the soft underlayer, and a grain isolation initiation layer (GIIL) positioned on the interlayer, a magnetic layer positioned on the GIIL, and an exchange break layer (EBL) positioned on the magnetic layer. The GIIL and/or EBL includes a CoCrRu-oxide.
    Type: Grant
    Filed: June 6, 2013
    Date of Patent: November 17, 2015
    Assignee: Western Digital (Fremont)
    Inventors: Daehoon Hong, Sy Vu, Kyongha Kang, B. Ramamurthy Acharya
  • PERPENDICULAR RECORDING MEDIA WITH GRAIN ISOLATION INITIATION LAYER AND EXCHANGE BREAKING LAYER FOR SIGNAL-TO-NOISE RATIO ENHANCEMENT
    Publication number: 20140300994
    Abstract: Aspects of the present invention relate to a perpendicular magnetic recording (PMR) media stack and methods for fabricating the same. The PMR media stack has a novel grain isolation initiation layer (GIIL) and/or a novel exchange-break layer (EBL) that can improve the signal-to-noise performance of the PMR media stack. The PMR media stack includes a substrate, a soft underlayer on the substrate, an interlayer positioned on the soft underlayer, and a grain isolation initiation layer (GIIL) positioned on the interlayer, a magnetic layer positioned on the GIIL, and an exchange break layer (EBL) positioned on the magnetic layer. The GIIL and/or EBL includes a CoCrRu-oxide.
    Type: Application
    Filed: June 6, 2013
    Publication date: October 9, 2014
    Inventors: DAEHOON HONG, SY VU, KYONGHA KANG, B. RAMAMURTHY ACHARYA