Method for preventing magnetic damage to a GMR head during...

Details Method for preventing magnetic damage to a GMR head during... Method for preventing magnetic damage to a GMR head during...

2005-07-05

2008-10-28

Tugbang, A. Dexter (Department: 3729)

Metal working

Method of mechanical manufacture

Electrical device making

C029S603010, C029S603170, C324S202000, C324S205000, C148S103000, C148S108000

Reexamination Certificate

active

07441324

ABSTRACT:
A method is provided for preserving the transverse biasing of a GMR (or MR) read head during back-end processing. In a first preferred embodiment, the method comprises magnetizing the longitudinal biasing layers of the read head in a transverse direction, so that the resulting field at the position of the transverse biasing layer places it in a minimum of potential energy which stabilizes its direction. The field of the longitudinal biasing layer is then reset to the longitudinal direction in a manner which maintains the transverse biasing direction. In a second embodiment, a novel fixture for mounting the read head during processing includes a magnetic portion which stabilizes the transverse bias of the read head. The two methods may be used singly or in combination.

REFERENCES:
patent: 5214840 (1993-06-01), Imagawa et al.
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patent: 5974657 (1999-11-01), Fox et al.
patent: 6146813 (2000-11-01), Girard et al.
patent: 6230389 (2001-05-01), Zhu
patent: 6374479 (2002-04-01), Sasaki et al.
patent: 6415500 (2002-07-01), Han et al.
patent: 10-149514 (1998-06-01), None

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