Method for aligning pole tips in a thin film head

Details Method for aligning pole tips in a thin film head Method for aligning pole tips in a thin film head

1990-02-15

1992-08-25

Niebling, John

Electrolysis: processes, compositions used therein, and methods

Electrolytic coating

Coating selected area

29603, 156643, 156656, 1566591, 1566611, 20419234, 360110, 205135, 205159, 205188, 205221, C25D 502

Patent

active

051416239

ABSTRACT:
A thin film magnetic read/write head is manufactured using a multi-layered sacrificial mask in a pole tip alignment process. The sacrificial mask includes a layer of metal deposited upon the magnetic upper pole tip. Subsequent sacrificial mask layers include nickel-iron alloy or photoresist. Following an ion milling alignment process, residual sacrificial mask layers are removed using a process in which the medal layer is selectively chemically etched away from the thin film magnetic head.

REFERENCES:
patent: 4399479 (1983-08-01), Mechel
patent: 4436593 (1984-03-01), Osborne et al.
patent: 4481071 (1984-11-01), Anderson et al.
patent: 4791719 (1988-12-01), Kobayashi et al.

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