Recording/reproducing separated type head with heat...

Details Recording/reproducing separated type head with heat... Recording/reproducing separated type head with heat...

2005-08-30

2005-08-30

Heinz, A. J. (Department: 2653)

Dynamic magnetic information storage or retrieval

Head

Magnetoresistive reproducing head

C360S319000

Reexamination Certificate

active

06937445

ABSTRACT:
An area in which an insulating film is formed over a substrate of a recording/reproducing separated type head is limited to the vicinity of a GMR film. This enables heat of Joule heating by a coil to be guided to the substrate without being obstructed by the insulating film. Electrodes, an upper shield film, a lower shield and a lower pole that are formed in-between are metallic thin films of high thermal conductivity, and accordingly have little influence. Similarly, gap films and a separation film that are positioned in-between, though they are electrically insulating films made of A12O3, have no great influence because of their thinness. According to the invention, a rise of the head's own temperature is restrained by efficiently radiating heat generated by the head itself to the substrate. As a result, it is thereby made possible to provide a highly reliable recording/reproducing separated type head whose deformation quantity is smaller and which can avoid coming into contact with a recording medium.

REFERENCES:
patent: 6025977 (2000-02-01), Hu et al.
patent: 6724569 (2004-04-01), Chen et al.
L. Pust et al, “Thermomechanical Head Performance”, IEEE Transactions on Magnetics, vol. 38, No. 1, Jan. 2002, pp. 101-106.

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