Only Single-type Nonmagnetic Particle Patents (Class 428/844.1)
Surface modified particle (e.g., aluminum oxide coated particles, etc.) (Class 428/844.2)
Alumina particle (i.e., a12o3) (Class 428/844.3)
Carbon black particle (e.g., lamp carbon, etc.) (Class 428/844.4)
  • Anti-reflection data storage medium
    Patent number: 10643648
    Abstract: An anti-reflection storage medium. The anti-reflection storage medium includes a storage layer and a protective overcoat disposed over the storage later. The protective overcoat has a first refractive index value that is matched to a second refractive index value of the storage layer to reduce reflection of incident light applied to the storage medium when data is written to the storage layer of the storage medium.
    Type: Grant
    Filed: June 30, 2016
    Date of Patent: May 5, 2020
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: Li Hong Zhang, Xiong Liu, Swee Chuan Gan
  • MAGNETIC STORAGE MEDIUM COMPRISED OF MAGNETIC NANOPARTICLES CONTAINED WITHIN NANOTUBES
    Publication number: 20130230743
    Abstract: A magnetic storage medium is formed of magnetic nanoparticles that are encapsulated within nanotubes (e.g., carbon nanotubes).
    Type: Application
    Filed: April 16, 2013
    Publication date: September 5, 2013
    Applicant: Sigma Pro Ltd. LLC
    Inventor: Tyson York Winarski
  • Magnetic recording medium utilizing specified non-magnetic particles in the magnetic layer
    Patent number: 7517598
    Abstract: A magnetic recording medium having a non-magnetic support and a magnetic layer formed thereon, wherein the magnetic layer comprises a ferromagnetic powder, a binder and a non-magnetic inorganic powder, and wherein at least 95% of the non-magnetic powder particles contained in the magnetic layer have a particle size of 0.05 to 0.013 ?m, provide that the non-magnetic powder particles are those found in a field of view of 1.8 ?m×2.4 ?m when the surface of the magnetic layer is observed with a scanning electron microscope at a magnification of 50,000 times.
    Type: Grant
    Filed: January 10, 2007
    Date of Patent: April 14, 2009
    Assignee: Hitachi Maxell, Ltd.
    Inventors: Ken Yoshimura, Tetsutaro Inoue
  • Magnetic recording medium
    Publication number: 20070231613
    Abstract: A magnetic recording medium including a nonmagnetic support and a magnetic layer containing ferromagnetic powder and a binder, wherein the magnetic layer contains diamond particles having an average particle size of from 20 to 100 nm, a volume per a particle of the ferromagnetic powder is from 100 to 8,000 nm3, and the support has an intrinsic viscosity of from 0.40 to 0.60 dl/g and is substantially free from particles.
    Type: Application
    Filed: March 30, 2007
    Publication date: October 4, 2007
    Applicant: FUJIFILM Corporation
    Inventors: Masatoshi Takahashi, Katsuhiko Meguro, Takeshi Harasawa
  • Magnetic recording medium utilizing specified non-magnetic particles in the magnetic layer
    Patent number: 7175927
    Abstract: A magnetic recording medium having a non-magnetic support and a magnetic layer formed thereon, wherein the magnetic layer comprises a ferromagnetic powder, a binder and a non-magnetic inorganic powder, and wherein at least 95% of the non-magnetic powder particles contained in the magnetic layer have a particle size of 0.05 to 0.013 ?m, provide that the non-magnetic powder particles are those found in a field of view of 1.8 ?m×2.4 ?m when the surface of the magnetic layer is observed with a scanning electron microscope at a magnification of 50,000 times.
    Type: Grant
    Filed: November 9, 2004
    Date of Patent: February 13, 2007
    Assignee: Hitachi Maxell, Ltd.
    Inventors: Ken Yoshimura, Tetsutaro Inoue