Patents Assigned to SHOWA DENKO K.K. and TOSHIBA CORPORATION
  • Publication number: 20030104250
    Abstract: A magnetic recording medium that is capable of recording and reading back information at a higher density by improving the read/write characteristics and thermal stability, a method of manufacture therefor, and a magnetic read/write apparatus are provided. This magnetic recording medium, comprises an orientation control film that controls the orientation of a film provided directly thereabove, a perpendicular magnetic film, of which the axis of easy magnetization is generally oriented perpendicular to a non-magnetic substrate, and a protective film, that are provided on the non-magnetic substrate, wherein the perpendicular magnetic film is made of a material which contains Co, Cr, Pt and Cu, the Cr content being 16 at % to 24 at % and the Cu content being 0.
    Type: Application
    Filed: August 15, 2002
    Publication date: June 5, 2003
    Applicant: SHOWA DENKO K.K. and TOSHIBA CORPORATION
    Inventors: Kenji Shimizu, Akira Sakawaki, Hui Yang, Hiro Mochizuki, Hiroshi Sakai, Takashi Hikosaka, Futoshi Nakamura
  • Publication number: 20030059651
    Abstract: A magnetic recording medium having excellent magnetic read/write characteristics and thermal stability characteristics, and a method of manufacturing therefor, and a magnetic read/write apparatus are provided. This magnetic recording medium comprises an orientation control film 3 that controls the orientation of a film provided directly thereabove, a perpendicular magnetic film 5, of which the axis of easy magnetization is generally oriented perpendicular to a substrate, and a protective film 6, that are provided on a non-magnetic substrate 1, wherein the orientation control film 3 is made of a non-magnetic material which contains 33 to 80 at % of Ni and one or more kinds of elements selected from Sc, Y, Ti, Zr, Hf, Nb and Ta.
    Type: Application
    Filed: September 13, 2002
    Publication date: March 27, 2003
    Applicant: SHOWA DENKO K.K. and TOSHIBA CORPORATION
    Inventors: Kenji Shimizu, Akira Sakawaki, Hui Yang, Hiro Mochizuki, Hiroshi Sakai, Takashi Hikosaka, Soichi Oikawa