Method for fabricating magnetic recording poles

Details Method for fabricating magnetic recording poles Method for fabricating magnetic recording poles

1988-03-09

1990-03-27

Schor, Kenneth M.

Dynamic magnetic information storage or retrieval

Head

Core

156643, 156656, 1566591, 1566611, 360120, G11B 5147

Patent

active

049125842

ABSTRACT:
The poles are suited for mounting on the side of a slider carrying a magnetic head. The method allows very narrow gaps between poles. In one embodiment of the invention, a magnetic pole is deposited on a substrate. A nonmagnetic material such as Al.sub.2 O.sub.3 is deposited from the side onto the pole and substrate. A preselected pattern of photoresist is next deposited on the nonmagnetic layer and a second magnetic material is deposited. The photoresist is removed and excess magnetic material is removed by ion milling from the side opposite to that of the nonmagnetic material deposition. Another embodiment is disclosed for making two- and three-pole heads.

REFERENCES:
patent: 4424271 (1984-01-01), Keel et al.
patent: 4601099 (1986-07-01), Nishiyama
patent: 4652954 (1987-03-01), Church

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