Dynamic magnetic information storage or retrieval – Head – Core
Reexamination Certificate
2007-07-31
2007-07-31
Klimowicz, William J (Department: 2627)
Dynamic magnetic information storage or retrieval
Head
Core
C029S603150, C029S603160
Reexamination Certificate
active
10782496
ABSTRACT:
Aggressive (i.e. tight tolerance) stitching offers several advantages for magnetic write heads but at the cost of some losses during pole trimming. This problem has been overcome by replacing the alumina filler layer, that is used to protect the stitched pole during trimming, with a layer of electro-plated material. Because of the superior step coverage associated with the plating method of deposition, pole trimming can then proceed without the introduction of stresses to the stitched pole while it is being trimmed.
REFERENCES:
patent: 5640753 (1997-06-01), Schultz et al.
patent: 6591480 (2003-07-01), Chen et al.
patent: 6600629 (2003-07-01), Kanada et al.
patent: 6608737 (2003-08-01), Han et al.
patent: 2004/0223258 (2004-11-01), Giorgis et al.
Chen Mao-Min
Han Cherng-Chyi
Lauchlan Laurie
Zhang Lei
Ackerman Stephen B.
Headway Technologies Inc.
Klimowicz William J
Saile Ackerman LLC
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