Write first design for a perpendicular thin film head
View Patent ↗A magnetic head structure for perpendicular recording and reading. The head structure includes a write head portion for writing data to magnetic media via lines of flux oriented substantially perpendicular to a surface of the media facing the write head portion. The write head portion includes a first pole piece having a first pole tip, a probe pole piece with a probe pole tip for emitting magnetic flux, an insulation stack positioned between the pole pieces, and one or more write coils embedded in the insulation stack. A read head portion that has been fabricated after the write head portion is coupled to the write head portion.
1. A magnetic head structure for perpendicular recording and reading, comprising:
a write head portion for writing data to magnetic media via lines of flux oriented substantially perpendicular to a surface of the media facing the write head portion, the write head portion including:
a first pole piece, the first pole piece having a first pole tip;
a probe pole piece, the probe pole piece having a probe pole tip for emitting magnetic flux;
an insulation stack positioned between the pole pieces; and
at least one write coil embedded in the insulation stack; and
a read head portion; and
a slider, the write head being positioned between the read head and the slider, and the probe pole piece being disposed between the first pole piece and the slider.
2. A magnetic head structure as recited in claim 1 , further comprising a shaping layer positioned between the probe pole piece and the insulation stack, the shaping layer being for focusing flux to the probe pole tip.
3. A magnetic head structure as recited in claim 1 , wherein the probe pole piece is constructed at least in part of a deposited film that has been ion-milled.
4. A magnetic head structure as recited in claim 1 , wherein an aspect ratio of the probe pole tip is less than 10:1.
5. A magnetic head structure as recited in claim 1 , wherein head portions are thin film heads.
6. A magnetic head structure as recited in claim 1 , wherein the first pole piece functions as a shield layer for the read portion.
7. A magnetic head structure as recited in claim 1 , wherein the read head portion includes first and second shield layers and a sensor positioned therebetween.
8. A magnetic head structure for perpendicular recording and reading, comprising:
a thin film write head portion for writing data to magnetic media via lines of flux oriented substantially perpendicular to a surface of the media facing the write head portion, the write head portion including:
a first pole piece, the first pole piece having a first pole tip;
a probe pole piece, the probe pole piece having, a probe pole tip for emitting magnetic flux;
an insulation stack positioned between the pole pieces;
at least one write coil embedded in the insulation stack;
a shaping layer positioned between the probe pole piece and the insulation stack, the shaping layer being for focusing flux to the probe pole tip;
a thin film read head; and
a slider, the write head being disposed between the read head and the slider, and the probe pole piece being disposed between the first pole piece and the slider.
9. A magnetic head structure as recited in claim 8 , wherein the probe pole piece is constructed at least in part of a deposited film that has been ion-milled.
10. A magnetic head structure as recited in claim 8 , wherein an aspect ratio of the probe pole tip is less than 10:1.
11. A magnetic head structure as recited in claim 8 , wherein an aspect ratio of the probe pole tip is less than 5:1.
12. A magnetic head structure as recited in claim 8 , wherein the first pole piece functions as a shield layer for the read portion.
13. A magnetic head structure as recited in claim 8 , wherein the read head portion includes first and second shield layers and a sensor positioned therebetween.
14. A magnetic storage system, comprising:
magnetic media;
at least one head for reading from and writing to the magnetic media, each head having:
a write head portion for writing data to the medium via lines of flux oriented substantially perpendicular to a surface of the media facing the write head portion, the write head portion including:
a first pole piece, the first pole piece having a first pole tip;
a probe pole piece, the probe pole piece having a probe pole up for emitting magnetic flux;
an insulation stack positioned between the pole pieces; and
at least one write coil embedded in the insulation stack;
a read head portion; and
a slider, the write head being disposed between the read head and the slider, and the probe pole piece being located between the first pole piece and the slider.
15. A storage system as recited in claim 14 , further comprising a shaping layer positioned between the probe pole piece and the insulation stack, the shaping layer being for focusing flux to the probe pole tip.
16. A storage system as recited in claim 14 , wherein the probe pole piece is constructed at least in part of a deposited film that has been ion-milled.
17. A storage system as recited in claim 14 , wherein an aspect ratio of the probe pole tip is less than 10:1.
18. A storage system as recited in claim 14 , wherein the magnetic media has a magnetically hard first layer positioned towards the at least one head, and a magnetically soft second layer positioned behind the first layer.