Process to form an ABS through aggressive stitching

Details Process to form an ABS through aggressive stitching Process to form an ABS through aggressive stitching

2007-07-26

2009-12-15

Tugbang, A. Dexter (Department: 3729)

Metal working

Method of mechanical manufacture

Electrical device making

C029S603240, C029S603250, C029S603120, C029S603140, C205S135000

Reexamination Certificate

active

07631418

ABSTRACT:
A manufacturing process is provided where 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 electroplated 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: 4315985 (1982-02-01), Castellani et al.
patent: 6195872 (2001-03-01), Sasaki
patent: 6591480 (2003-07-01), Chen et al.
patent: 6608737 (2003-08-01), Han et al.
patent: 61079785 (1986-04-01), None

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