Dual writer for advanced magnetic recording
The present disclosure generally relates to a magnetic media drive employing a magnetic recording head. The magnetic recording head comprises a first write head, a second write head, at least one read head, and a thermal fly height control element. The first write head is a wide writing write head comprising a first main pole and a first trailing shield. The second write head a narrow writing write head comprising a second main pole, a trailing gap, a second trailing shield, and one or more side shields. The first main pole has a shorter height and a greater width than the second main pole. The second main pole has a curved or U-shaped surface disposed adjacent to the trailing gap. The thermal fly height control element and the at least one read head are aligned with a center axis of the second main pole of the second write head.
1. A magnetic recording head, comprising:
a first write head, comprising:
a first main pole;
a first trailing shield disposed adjacent to the first main pole; and
a first seed layer surrounding two or more sides of the first main pole,
the first seed layer having a first thickness; and
a second write head disposed adjacent to the first write head, comprising:
a second main pole;
a second trailing shield disposed adjacent to the second main pole;
a second seed layer surrounding two or more sides of the second main pole, the second seed layer having a second thickness less than the first thickness of the first seed layer; and
one or more side shields surrounding two or more surfaces of the second main pole.
2. The magnetic recording head of claim 1 , wherein the first and second seed layers comprise ruthenium, and wherein a first trailing gap of the first write head has a different width than a second trailing gap of the second write head.
3. The magnetic recording head of claim 1 , wherein the first main pole has a shorter height from a trailing edge of the first main pole to a leading edge of the first main pole than the second main pole.
4. A data storage device comprising the magnetic recording head of claim 1 .
5. The data storage device of claim 4 , wherein a write width of the first write head is wider than that of the second write head.
6. The data storage device of claim 5 , further comprising a controller configured to:
cause the first write head to first write one or more even tracks or one or more odd tracks of a media, and
cause the second write head to subsequently write tracks of the media not written by the first write head.
7. The data storage device of claim 6 , wherein the write of the tracks of the media written by the second write head trims edges of the tracks written by the first write head.
8. A magnetic recording head, comprising:
a first write head, comprising:
a first main pole;
a first seed layer surrounding at least two sides of the first main pole and having a first height from a trailing edge of the first main pole to a leading edge of the first main pole; and
a first trailing shield disposed adjacent to the first main pole;
a second write head disposed adjacent to the first write head, comprising:
a second main pole;
a second seed layer surrounding at least two sides of the second main pole and having a second height from a trailing edge of the second main pole to a leading edge of the second main pole, wherein the first height is shorter than the second height; and
a second trailing shield disposed adjacent to the second main pole; and
one or more side shields surrounding two or more surfaces of the second main pole;
one or more read heads, wherein a first read head of the one or more read heads is aligned with the second main pole of the second write head; and
a thermal fly height control element aligned with the second main pole of the second write head and the first read head.
9. The magnetic recording head of claim 8 , wherein a write width of the first write head is wider than that of the second write head.
10. The magnetic recording head of claim 8 , wherein the thermal fly height control element is disposed between the second main pole and the first read head.
11. The magnetic recording head of claim 8 , wherein the first write head and the second write head are vertically stacked and disposed in a stacked formation.
12. The magnetic recording head of claim 8 , wherein the first write head is disposed adjacent to the second write head in a cross-the-track direction in a side-by-side formation.
13. The magnetic recording head of claim 8 , wherein a second read head of the one or more read heads is offset from the second main pole in a direction towards the first main pole.
14. A data storage device comprising the magnetic recording head of claim 8 .
15. A magnetic recording head, comprising:
a first write head, comprising:
a first main pole;
a first trailing shield disposed adjacent to the first main pole; and
a first seed layer surrounding two or more sides of the first main pole, the first seed layer having a first thickness, the first seed layer having a first height from a trailing edge of the first main pole to a leading edge of the first main pole; and
a second write head disposed adjacent to the first write head, comprising:
a second main pole;
a second trailing shield disposed adjacent to the second main pole;
a second seed layer surrounding two or more sides of the second main pole, the second seed layer having a second thickness less than the first thickness of the first seed layer, the second seed layer having a second height from a trailing edge of the second main pole to a leading edge of the second main pole; and
one or more side shields surrounding two or more surfaces of the second main pole.
16. The magnetic recording head of claim 15 , further comprising one or more read heads.
17. The magnetic recording head of claim 15 , further comprising a thermal fly height element.
18. The magnetic recording head of claim 15 , wherein the first write head and the second write head are disposed adjacent one another in a cross-the-track direction.
19. The magnetic recording head of claim 15 , wherein the first write head and the second write head are vertically aligned with a thermal fly height element.
20. A data storage device comprising the magnetic recording head of claim 15 .