Pole tip trimmed magnetic recording head with minimal edge...

Details Pole tip trimmed magnetic recording head with minimal edge... Pole tip trimmed magnetic recording head with minimal edge...

2007-08-21

2007-08-21

Evans, Jefferson (Department: 2627)

Dynamic magnetic information storage or retrieval

Head

Core

C360S122000

Reexamination Certificate

active

10681684

ABSTRACT:
In the present method for manufacturing a magnetic write head a focused ion beam (FIB) tool is utilized to mill the side edges of a P2pole, in order to provide a narrowed track width. Prior to milling, a thin film layer of material is deposited upon the P2pole tip. The milling boxes of the FIB tool are properly aligned upon the layer with reference to the location of the P2pole tip. Milling of the lateral edges of the P2pole tip is then conducted to the appropriate depth, and the layer of material is removed. The resulting P2pole tip has sharp lateral edges, rather than the rounded edges that are produced in prior art FIB processing methods that do not utilize the thin film layer. In a preferred implementation, the FIB tool is utilized first to deposit the thin film layer and thereafter to perform the milling operation.

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Annotated photograph illustrating use of Micrion ion milling device dated Mar. 9, 1998.

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