Thin film magnetic recording medium and producing method of the

Details Thin film magnetic recording medium and producing method of the Thin film magnetic recording medium and producing method of the

1987-05-04

1989-03-07

Lesmes, George F.

Stock material or miscellaneous articles

All metal or with adjacent metals

Composite; i.e., plural, adjacent, spatially distinct metal...

428928, 428669, 428673, 428678, 428694, 428900, B32B 1501

Patent

active

048105929

ABSTRACT:
Disclosed is a thin film magnetic recording medium which comprises a substrate and a magnetic layer formed on the substrate, the magnetic layer including a lamination composed of at least a grain size suppression film and a magnetic film formed on each of opposite sides of the grain size suppression film, the grain size suppression film being made of at least a grain size suppressing metal, the magnetic film being made of a cobalt magnetic material, and further disclosed is a method of producing a thin film magnetic recording medium which comprises the step of: dipping a substrate in an electroless plating solution for depositing a crystal of a cobalt magnetic material on the substate to form a first crystal film thereon; adding a metallic salt solution for suppressing growth of a grain size of a crystal structure into the electroless plating solution at least once after a predetermined period of time has passed from the dipping of the substrate under the condition that the substrate is dipped in the electroless plating solution to thereby form a grain size suppression film on the first crystal film; and forming then a second crystal film having a crystal structure of a small grain size on the grain size suppression film.

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