Manufacturing method of magnetic head apparatus with spin valve

Details Manufacturing method of magnetic head apparatus with spin valve Manufacturing method of magnetic head apparatus with spin valve

1996-10-07

1998-06-30

Sheehan, John

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

360113, 2960308, C21D 104

Patent

active

057727945

ABSTRACT:
A method of manufacturing a magnetic head apparatus with a magnetoresistive head utilizing the spin valve effect includes a final heat treatment step (S14) of heating the multi-layered spin valve structure (15) with application of a magnetic field in a direction perpendicular to a track width direction of the spin valve magnetoresistive head so that a thin film layer of soft ferromagnetic material (3, 5) to be pinned by a thin film layer of antiferromagnetic material (6) has a uniaxial anisotropy. This final heat treatment step (S14) is executed after all the steps (S1, S3, S5, S7, S8, S9, S11) each of which includes a heat treatment stage executed at a temperature which will vary a uniaxial anisotropy of the pinned thin film layer of soft ferromagnetic material (3,5) are completed.

REFERENCES:
patent: 4103315 (1978-07-01), Hempstead et al.
patent: 5206590 (1993-04-01), Dieny et al.
patent: 5385637 (1995-01-01), Thayamballi
patent: 5529814 (1996-06-01), Tan et al.
patent: 5549978 (1996-08-01), Iwasaki et al.
patent: 5648885 (1997-07-01), Nishioka et al.
Database WPI, Section EI, Week 9611, Derwent Publications Ltd., London, GB; Class S01, AN 96-031918 XP002021523 & JP-A-08 007 235, Jan. 12, 1996 and EP-A-0 687 917, Dec. 20, 1995.

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