Magnetic recording member

Details Magnetic recording member Magnetic recording member

1992-04-01

1993-04-20

Pianalto, Bernard

Stock material or miscellaneous articles

Composite

Of inorganic material

427128, 427130, 427131, 427132, 427554, 428900, 428928, H01F 1002

Patent

active

052041921

ABSTRACT:
A member is prepared by forming a magnetic surface layer on a magnetic base member having a different composition from the surface layer. A laser beam is radiated onto the member so as to fuse the member and the surface layer, thereby forming a fused portion having magnetic properties. A modified portion is formed in a portion of the fused portion corresponding to the surface layer such that this portion has different permeability from other portions of the surface layer.

REFERENCES:
patent: 3900593 (1975-08-01), Herczog et al.
patent: 4664941 (1987-05-01), Washburn
patent: 4871582 (1989-10-01), Miyabayashi
patent: 4964967 (1990-10-01), Hashimoto et al.

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