Patents Assigned to NKK CORPORAITON
  • Steel sheet for tension mask, manufacturing method of steel sheet for tension mask, tension mask and cathode ray tube
    Publication number: 20040003868
    Abstract: A steel sheet for a tension mask excellent in the shielding properties from geomagnetism consists essentially of lower than 0.1% by weight of C, lower than 0.2% by weight of Si, 0.4 to 2% by weight of Mn, not higher than 0.1% by weight of P, not higher than 0.03% by weight of S, not higher than 0.01% by weight of sol. Al, 0.003 to 0.02% by weight of N and the balance of Fe, and has an anhysteretic magnetic permeability of 5,000 or higher.
    Type: Application
    Filed: July 2, 2003
    Publication date: January 8, 2004
    Applicants: NKK CORPORAITON, SONY CORPORATION
    Inventors: Hideki Matsuoka, Yasushi Tanaka, Reiko Sugihara, Tatsuhiko Hiratani, Kenichiro Takayanagi, Masamichi Okada, Hiroaki Kato