Title:
【発明の名称】情報記録媒体
Document Type and Number:
Japanese Patent JP3002690
Kind Code:
B2
Abstract:
PURPOSE:To realize recording on an amorphous material which can safely hold recorded contents with high secrecy by pressing a part of an amorphous ferromagnetic metal tag to change the property thereof as a magnetic material. CONSTITUTION:An amorphous ferromagnetic metal tag 3 is composed of an amorphous ferromagnetic material having a high permeability and Matteuci effect, namely an amorphous ferromagnetic metal. The amorphous ferromagnetic metal tag 3 is selectively pressed with a press jig 7 for writing of information. In this case, the information once written by the pressing process changes an organization of the amorphous ferromagnetic metal exceeding an elastic limit at the pressed area, thereby preventing errorneous erasing by heat and magnetic field, etc. Moreover, writing of information is carried out under the condition that pressing pressure is extremely high and therefore recorded information is never changed by 'chafing' or 'bending' which are often seen in the ordinary use.
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Inventors:
Ichiro Mizukami
Application Number:
JP3255793A
Publication Date:
January 24, 2000
Filing Date:
January 29, 1993
Export Citation:
Assignee:
Dai Nippon Printing Co.,Ltd.
Ministry of Finance Printing Bureau
Ministry of Finance Printing Bureau
International Classes:
G06K19/06; G11B5/64; G11B5/65; G11B5/66; G11B5/80; G11B11/20; (IPC1-7): G11B11/20; G06K19/06; G11B5/66
Domestic Patent References:
| JP2253997A | ||||
| JP6143883A | ||||
| JP629488A | ||||
| JP499208U |
Attorney, Agent or Firm:
Manabu Otsuka