MAGNETIC RECORDING MEDIUM

• Main Authors: NAKAMURA MINORU, SUENAGA WATARU, IMAIZUMI NAOYUKI
• Format: Patent
• Language: English
• Published: 06.11.1991
• Subjects: 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

PURPOSE:To obtain specified magnetic output of a magnetic recording medium having a magnetic layer and a shielding layer independent of thickness of the shielding layer by specifying the residual magnetic flux density of the magnetic layer to >=2,000 emu/cm . CONSTITUTION:The magnetic recording medium has a magnetic layer 2 and a shielding layer 5 which completely hides the color phase of the magnetic layer 2. The residual magnetic flux density of the magnetic layer 2 is specified to >=2,000 emu/cm . Namely, by limiting the residual magnetic flux density of the magnetic layer 2 to a specified range independent of thickness of the shielding layer 5, specified magnetic output can be obtained. Thereby, thickness of spacing loss which is determined by the shielding layer 5 can be freely selected and the medium can be formed according to various designs without reducing recording density characteristics.