Invention Grant
US07701666B2 Perpendicular magnetic recording write head with a self aligned stitched write shield 失效
垂直磁记录写头与自对准缝合写屏蔽

Perpendicular magnetic recording write head with a self aligned stitched write shield
Abstract:
A perpendicular magnetic recording (PMR) head with single or double coil layers has a small write shield stitched onto a main write shield. The stitched shield allows the main write pole to produce a vertical write field with sharp vertical gradients that is reduced on both sides of the write pole so that adjacent track erasures are eliminated. From a fabrication point of view, both the main pole and the stitched shield are defined and formed using a single photolithographic process, a trim mask and CMP lapping process so that the main shield can be stitched onto a self-aligned main pole and stitched shield.
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