Magnetic head having writer with embedded write gap between wear-resistant pole tip layers
View Patent ↗A method of fabricating a magnetic writer includes depositing a wear-resistant bottom pole tip layer on a bottom pole; depositing a write gap layer on the bottom pole tip layer; and depositing a wear-resistant top pole tip layer on the write gap layer. The layers are patterned such that the write gap layer and the top pole tip layer each have a track width facing a media surface and the write gap layer and the top pole tip layer each have the same length equal to a throat height between the media surface and a zero throat location. The bottom pole tip layer and the bottom pole are patterned such that the bottom pole tip layer has the track width facing the media surface and the bottom pole has a bottom pole tip at the media surface with the bottom pole tip having the track width facing the media surface.
1. A writer for a magnetic head, the writer comprising:
a bottom pole tip including cobalt-zirconium-tantalum (CZT);
a nitride wear-resistant bottom pole tip layer including either NiFe/FeN or CZT/FeN laminates formed on and part of the bottom pole tip;
a nitride wear-resistant top pole tip layer including either NiFe/FeN or CZT/FeN laminates;
a write gap layer embedded between the wear-resistant pole tip layers; and
a plated NiFe top pole tip formed on and part of the wear-resistant top pole tip layer.
2. The writer of claim 1 wherein:
the wear-resistant pole tip layers and the write gap layer each have the same width facing a media bearing surface, the width defining a track width.
3. The writer of claim 2 wherein:
the bottom and top pole tips each have a width substantially equal to the track width facing the media bearing surface.
4. The writer of claim 3 wherein:
the bottom pole tip has an upper bottom pole portion and a lower bottom pole portion, the bottom pole portions having respective widths facing the media bearing surface, the width of the upper bottom pole portion being substantially equal to the track width, the width of the lower bottom pole portion being greater than the track width.
5. The writer of claim 4 wherein:
the wear-resistant bottom pole tip layer is formed on and is part of the upper bottom pole portion.
6. The writer of claim 5 wherein:
the widths of the upper bottom pole portion, the wear-resistant pole tip layers, the write gap layer, and the top pole tip are vertically aligned at the media bearing surface.
7. The writer of claim 6 wherein:
the wear-resistant pole tip layers and the write gap layer each have substantially the same length between the media bearing surface and a zero throat location, the length defining a throat height.
8. The writer of claim 2 wherein:
the wear-resistant top pole tip layer and the write gap layer each have substantially the same length between the media bearing surface and a zero throat location, the length defining a throat height.
9. A writer for a magnetic head, the writer comprising:
a bottom pole tip including cobalt-zirconium-tantalum (CZT);
a nitride wear-resistant bottom pole tip layer including either NiFe/FeN or CZT/FeN laminates formed on the bottom pole tip;
a nitride wear-resistant top pole tip layer including either NiFe/FeN or CZT/FeN laminates;
a write gap layer embedded between the wear-resistant pole tip layers; and
a plated NiFe top pole tip formed on the wear-resistant top pole tip layer;
wherein the wear-resistant pole tip layers and the write gap layer each have the same width facing a media bearing surface, the width defining a track width;
wherein the wear-resistant pole tip layers and the write gap layer each have substantially the same throat height between the media bearing surface and a zero throat location.
10. The writer of claim 9 wherein:
the bottom pole tip has an upper bottom pole portion and a lower bottom pole portion, the bottom pole portions having respective widths facing the media bearing surface, the width of the upper bottom pole portion being substantially equal to the track width, the width of the lower bottom pole portion being greater than the track width.
11. The writer of claim 10 wherein:
the widths of the upper bottom pole portion of the bottom pole tip, the wear-resistant pole tip layers, the write gap layer, and the top pole tip are vertically aligned respectively at the media bearing surface.