Write head with high thermal stability material

Details Write head with high thermal stability material Write head with high thermal stability material

1998-07-31

2000-06-06

Renner, Craig A.

Dynamic magnetic information storage or retrieval

Head

Core

360113, G11B 531, G11B 539

Patent

active

060726717

ABSTRACT:
A combined magnetic head (40) for a rotating magnetic media disk drive (30) wherein a write head portion (50) is structurally integral with a read head portion (52). During manufacture the read head portion (52) is exposed to high temperature in a magnetic field perpendicular to an air bearing surface (46) of the combined magnetic head (40). In order to prevent unwanted realignment of the P1 pole (78) and P2 pole (80) of the write head portion (50) the P1 pole (78) and (P2) pole are constructed from a class of materials known as nanocrystalline ferromagnetic oxides, which can withstand temperatures well in excess of the incident manufacturing conditions without succumbing to the unwanted effects.

REFERENCES:
patent: 5462809 (1995-10-01), Berkowitz
patent: 5529814 (1996-06-01), Tan et al.
patent: 5563331 (1996-10-01), Von Helmolt et al.
patent: 5587026 (1996-12-01), Iwasaki et al.
patent: 5589221 (1996-12-01), Hiramoto et al.
patent: 5591532 (1997-01-01), Berkowitz
patent: 5719730 (1998-02-01), Chang et al.
IEEE Transactions on Magnetics, vol. 33, No. 5, Sep. 1997 "NiFe/CoFeB Spin-Valve Heads for Over 5 Gbit/in.sub.2 Density Recording" pp. 2872-2874 .

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