Process for forming vertical gap in a thin film magnetic transdu

Details Process for forming vertical gap in a thin film magnetic transdu Process for forming vertical gap in a thin film magnetic transdu

1995-05-12

1997-02-11

Hall, Carl E.

Metal working

Method of mechanical manufacture

Electrical device making

2960315, G11B 542

Patent

active

056008805

ABSTRACT:
In the manufacture of a thin-film magnetic head having a vertical gap, auxiliary support is provided at the ends of a gap wall prior to formation of the magnetic poles. In a preferred embodiment, a pit is defined in a substrate and a release layer is deposited on the substrate followed by a layer of alumina. A recess is then etched through the alumina layer to the release layer in the pit. A partial layer of polymer or metal is deposited with a vertical edge across the median of the pit and recess. A layer of nonmagnetic wall material such as silicon oxide is deposited which after etching leaves a wall against the vertical edge of the partial layer. After removal of the partial layer, a vertical wall extends transversely across the recess and pit with the ends of the wall anchored and supported at the recess sidewalls. Alternatively, a pedestal may be provided in the recess to support each end of the wall. The magnetic poles are then formed simultaneously on either side of the wall. Other thin film layers are then deposited in an appropriate sequence of steps to complete the desired vertical gap, horizontal head structure. The substrate is separated from the completed thin film structure by dissolving the release layers.

REFERENCES:
patent: 4670972 (1987-06-01), Sakakima
patent: 4837924 (1989-06-01), Lazzari
patent: 4901177 (1990-02-01), Lazzari
patent: 4912584 (1990-03-01), Mallary et al.
patent: 5062196 (1991-11-01), Devoux-Dauphin

Affiliated with

Also associated with

Rating

Process for forming vertical gap in a thin film magnetic transdu does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for forming vertical gap in a thin film magnetic transdu, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for forming vertical gap in a thin film magnetic transdu will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-334180