Title:
【発明の名称】大容量磁気メモリーカードおよび製造方法
Document Type and Number:
Japanese Patent JPH03504779
Kind Code:
A
Abstract:
The invention relates to a high density high energy magnetic memory card. The card is provided throughout or part of at least one of its surfaces with a recording medium which contains magnetic particles having a coercitive field higher than 4000 Oe (320 kA/m), which has no overlying layer and which has a density of information higher than 5 kbits/cm<2>, an electric wear corresponding to an electric signal loss equal to or lower than 5 % for 2000 passages, a mean arithmetic rugosity lower than 10 nm, an abrasivity lower than 600 mu m, and a streak resistance lower than 1.5 mu m. Application to portable files and access controls.
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Inventors:
Pango Bernard
Application Number:
JP51137289A
Publication Date:
October 17, 1991
Filing Date:
October 17, 1989
Export Citation:
Assignee:
Jump Russe A.
International Classes:
C09D5/23; C09D175/00; C09D175/04; G11B5/70; G11B5/706; G11B5/73; G11B5/80; G11B5/84; (IPC1-7): G11B5/84; G11B5/80
Attorney, Agent or Firm:
Takashi Ishida (3 others)
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