Patents by Inventor Alex Rou

Alex Rou 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).

  • Applying bias voltage during formation of granular recording media
    Patent number: 8993073
    Abstract: An embodiment of the invention relates to a perpendicular magnetic recording medium comprising (1) a substrate, (2) an interlayer comprising hexagonal columns and (3) a magnetic layer, wherein the magnetic layer is deposited applying a bias voltage to the substrate such that the magnetic layer comprises magnetic grains having substantially no sub-grains within the magnetic layer, and the magnetic layer has perpendicular magnetic anisotropy.
    Type: Grant
    Filed: July 14, 2008
    Date of Patent: March 31, 2015
    Assignee: Seagate Technology LLC
    Inventors: Weilu Xu, Miaogen Lu, Mariana R. Munteanu, Michael Z. Wu, Shanghsien Alex Rou, Steve Kuo-Hsing Hwang, Ed Yen
  • Nickel based alloy layer for perpendicular recording media
    Patent number: 8053096
    Abstract: The invention relates to a perpendicular magnetic recording medium having a substrate and a seed layer comprising a Ni alloy.
    Type: Grant
    Filed: July 23, 2008
    Date of Patent: November 8, 2011
    Assignee: Seagate Technology LLC
    Inventors: Alexander Hazanov, Connie Chunling Liu, Qixu Chen, Kueir-Weei Chour, Xinwei Li, Shanghsien Alex Rou
  • EASY TO WRITE AND HARD TO DECAY MEDIA FOR HARD DISK DRIVE APPLICATIONS
    Publication number: 20100021763
    Abstract: A magnetic recording medium is presented, characterized by having a nonmonotonicity in the DCD curve, resulting in low dynamic coercivity when writing information to the medium, with high static coercivity and thermal stability during storage. A method is also presented for producing the magnetic recording medium of the present invention.
    Type: Application
    Filed: July 24, 2008
    Publication date: January 28, 2010
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Alan Huang, Connie Chunling Liu, John Wang, Romulo Canilon Ata, Shanghsien Alex Rou
  • NICKEL BASED ALLOYS AS CRYSTAL GROWTH ENHANCING AND MECHANICAL STRENGTHENING LAYER FOR PERPENDICULAR RECORDING MEDIA
    Publication number: 20100021770
    Abstract: The invention relates to a perpendicular magnetic recording medium having a substrate and a seed layer comprising a Ni alloy.
    Type: Application
    Filed: July 23, 2008
    Publication date: January 28, 2010
    Applicant: Seagate Technology LLC
    Inventors: Alexander Hazanov, Connie Chunling Liu, Qixu Chen, Kueir-Weei Chour, Xinwei Li, Shanghsien Alex Rou
  • HIGH DENSITY GRANULAR PERPENDICULAR RECORDING MEDIA FOR MECHANICAL RELIABILITY AND CORROSION RESISTANCE
    Publication number: 20100007989
    Abstract: An embodiment of the invention relates to a perpendicular magnetic recording medium comprising (1) a substrate, (2) an interlayer comprising hexagonal columns and (3) a magnetic layer, wherein the magnetic layer is deposited applying a bias voltage to the substrate such that the magnetic layer comprises magnetic grains having substantially no sub-grains within the magnetic layer, and the magnetic layer has perpendicular magnetic anisotropy.
    Type: Application
    Filed: July 14, 2008
    Publication date: January 14, 2010
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Weilu Xu, Miaogen Lu, Mariana R. Munteanu, Michael Z. Wu, Shanghsien Alex Rou, Steve Kuo-Hsing Hwang, Ed Yen
  • INTERLAYER DESIGN FOR MAGNETIC MEDIA
    Publication number: 20090042062
    Abstract: A magnetic recording medium having a substrate, an interlayer and a magnetic layer, the interlayer having at least a first intermediary layer, a second intermediary layer and a third intermediary layer, wherein the first intermediary layer or the third intermediary layer is non-magnetic or magnetic and the second intermediary layer has a hexagonal close pack crystal structure and a property of providing RKKY coupling between the first intermediary layer and the third intermediary layer when the first intermediary layer and the second intermediary layer are magnetic layers is disclosed.
    Type: Application
    Filed: July 1, 2008
    Publication date: February 12, 2009
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Erol Girt, Alex Rou, John Wang
  • Interlayer design for magnetic media
    Patent number: 7407720
    Abstract: A magnetic recording medium having a substrate, an interlayer and a magnetic layer, the interlayer having at least a first intermediary layer, a second intermediary layer and a third intermediary layer, wherein the first intermediary layer or the third intermediary layer is non-magnetic or magnetic and the second intermediary layer has a hexagonal close pack crystal structure and a property of providing RKKY coupling between the first intermediary layer and the third intermediary layer when the first intermediary layer and the second intermediary layer are magnetic layers is disclosed.
    Type: Grant
    Filed: March 31, 2004
    Date of Patent: August 5, 2008
    Assignee: Seagate Technology LLC
    Inventors: Erol Girt, Alex Rou, John Wang
  • Perpendicular magnetic recording media with improved scratch damage performance
    Publication number: 20080055777
    Abstract: A scratch erasure resistant perpendicular magnetic recording medium comprises a non-magnetic substrate having a surface, and a layer stack formed over the surface and comprising: (i) at least one magnetically hard perpendicular magnetic recording layer; and (ii) at least one low shear modulus layer comprising at least one material having a shear modulus not greater than about 30 GPa. Preferably, the at least one magnetically hard perpendicular magnetic recording layer includes at least a first layer comprised of a magnetic material having a hexagonal close packed (hcp) crystal structure and <0001> preferred basal plane crystallographic orientation with c-axis perpendicular to a surface thereof.
    Type: Application
    Filed: September 6, 2006
    Publication date: March 6, 2008
    Inventors: Shanghsien (Alex) Rou, Qixu (David) Chen, Raj N. Thangaraj, Huan Tang, Xinwei Li, Jing Gui
  • Highly oriented longitudinal magnetic media on direct textured glass substrates
    Publication number: 20050164038
    Abstract: Oriented longitudinal magnetic recording media on direct texture glass or glass-ceramic substrates with a film structure of one or more Ni-containing layer, a Cr-containing underlayer, a Co-containing magnetic layer and carbon overcoat exhibits are capable of achieving Mrt OR of >1.5, preferably >1.85. Such highly oriented glass media shows a significant SNR (>2 dB) and parametric improvement over the counterpart isotropic media with the same film structure on non-textured glass or glass-ceramic substrates.
    Type: Application
    Filed: January 7, 2005
    Publication date: July 28, 2005
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Shanghsien (Alex) Rou, John Wang, Romulo Ata, Kueir-Weei Chour
  • Interlayer design for magnetic media
    Publication number: 20050084669
    Abstract: A magnetic recording medium having a substrate, an interlayer and a magnetic layer, the interlayer having at least a first intermediary layer, a second intermediary layer and a third intermediary layer, wherein the first intermediary layer or the third intermediary layer is non-magnetic or magnetic and the second intermediary layer has a hexagonal close pack crystal structure and a property of providing RKKY coupling between the first intermediary layer and the third intermediary layer when the first intermediary layer and the second intermediary layer are magnetic layers is disclosed.
    Type: Application
    Filed: March 31, 2004
    Publication date: April 21, 2005
    Applicant: SEAGATE TECHNOLOGY
    Inventors: Erol Girt, Alex Rou, John Wang
  • Highly oriented longitudinal magnetic media on direct textured glass substrates
    Patent number: 6855439
    Abstract: Oriented longitudinal magnetic recording media on direct texture glass or glass-ceramic substrate with a film structure of one or more Ni-containing layer, a Cr-containing underlayer, a Co-containing magnetic layer and carbon overcoat exhibits are capable of achieving Mrt OR of >1.5, preferably >1.85. Such highly oriented glass media shows a significant SNR (>2 dB) and parametric improvement over the counterpart isotropic media with the same film structure on non-textured glass or glass-ceramic substrates.
    Type: Grant
    Filed: September 16, 2003
    Date of Patent: February 15, 2005
    Assignee: Seagate Technology LLC
    Inventors: Shanghsien Alex Rou, John Wang, Romulo Ata, Kueir-Weei Chour