Large-capacity magnetic memory card and manufacturing method

PCT No. PCT/FR89/00536 Sec. 371 Date Jun. 18, 1991 Sec. 102(e) Date Jun. 18, 1991 PCT Filed Oct. 17, 1989 PCT Pub. No. WO90/04843 PCT Pub. Date May 3, 1990.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 surface...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	PINGAUD, BERNARD
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS CORRECTING FLUIDS DYES FILLING PASTES INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER INKS METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING PHYSICS POLISHES USE OF MATERIALS THEREFOR WOODSTAINS
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	PCT No. PCT/FR89/00536 Sec. 371 Date Jun. 18, 1991 Sec. 102(e) Date Jun. 18, 1991 PCT Filed Oct. 17, 1989 PCT Pub. No. WO90/04843 PCT Pub. Date May 3, 1990.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/cm2, 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.