Method and apparatus for perpendicular magnetic recording medium

Details Method and apparatus for perpendicular magnetic recording medium Method and apparatus for perpendicular magnetic recording medium

1983-03-23

1984-05-08

Pianalto, Bernard D.

Coating processes

Electrical product produced

Integrated circuit, printed circuit, or circuit board

118 59, 118 68, 118640, 427128, 427130, 427348, H01F 1002, B05C 1100, B05D 306, B05B 500

Patent

active

044474679

ABSTRACT:
To manufacture a perpendicular magnetic recording medium, a nonmagnetic substrate having a coating layer of a binder with magnetic particles dispersed therein is passed through a magnetic field in a direction substantially perpendicular thereto, and a perpendicular orientation of the magnetic particles is performed as the substrate passes through an upstream region of the magnetic field. A viscosity of the coating layer is increased in a downstream region of the magnetic field, thereby restricting further movement of the magnetic particles in the coating layer before the nonmagnetic substrate is removed from the magnetic field.

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