Stitched shielded pole structure for a perpendicular...

Details Stitched shielded pole structure for a perpendicular... Stitched shielded pole structure for a perpendicular...

2007-05-22

2007-05-22

Renner, Craig A. (Department: 2627)

Dynamic magnetic information storage or retrieval

Head

Core

C360S119050

Reexamination Certificate

active

10814077

ABSTRACT:
A PMR write head has a stitched shield formation which results in a strong perpendicular write field with sharp vertical gradients. The shape of the stitched shield is determined by two design parameters, d=½(WSWSLE−WMPTE), and TSWS, where WSWSLEis the width of the leading edge of the stitched shield in the ABS plane, WMPTEis the width of the trailing edge of the main magnetic pole in the ABS plane and TSWSis the thickness of the stitched shield. By a proper choice of these parameters, the write field of the head is sharply limited in the cross-track direction, so that adjacent track erasures are eliminated.

REFERENCES:
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Co-pending U.S. Appl. No. HT-03-014, filed May 19, 2004, U.S. Appl. No. 10/849,312, “A Method for Making a Perpendicular Magnetic Recording Write Head With a Self Aligned Stitched Write Shield”, assigned to the same assignee.

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