Inductive write head with insulation stack configured for elimin

Details Inductive write head with insulation stack configured for elimin Inductive write head with insulation stack configured for elimin

1996-10-21

1998-08-25

Heinz, A. J.

Dynamic magnetic information storage or retrieval

Head

Core

G11B 5147

Patent

active

057988978

ABSTRACT:
The present invention employs a ZTH defining insulation layer with a relatively long flat region along with a scheme for eliminating reflective notching from the next insulation layer on top of the ZTH defining insulation layer. This has been accomplished by providing the next insulation layer with a plurality of sloping surfaces which are oriented so that light reflected by the sloping surfaces is directed to areas remote from a pattern of a second pole tip in a photoresist layer which is employed for fabricating the second pole tip. The sloping surfaces terminate at a non-linear front edge which may include a plurality of straight edges extending in predetermined directions. The directions of these straight edges will define the orientations of the sloping surfaces. In one embodiment the straight edges may all be non-parallel and non-perpendicular to the ABS. In another embodiment a first plurality of the straight edges may be perpendicular to the ABS and a second plurality of the straight edges may be at a non-perpendicular angle to the ABS with the first and second plurality of straight edges alternating with respect to one another.

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