Magnetic recording head with assisting electric current in trailing shield
The present disclosure is generally related to a magnetic recording device comprising a magnetic recording head having a first current flow in a cross-track direction through a trailing shield. In one or more embodiments, a second current flows in a cross-track direction around the main pole. The magnetic recording device comprises a main pole disposed between a trailing shield, a leading shield, and side shields. A trailing gap is disposed between the side shields and the trailing shield. A high moment seed layer is disposed between the main pole and the trailing shield. A first insulation layer is disposed within the trailing shield and directs the first current through the trailing shield, guided to the proximity of the main pole. A second insulation layer, disposed below the trailing shield, directs the second current through the trailing shield, or alternatively through the side shields and around the main pole.
1. A magnetic recording head, comprising:
a main pole;
a first side shield disposed adjacent to a first surface of the main pole;
a second side shield disposed adjacent to a second surface of the main pole opposite the first surface;
a trailing shield disposed over the first side shield, the second side shield, and a third surface of the main pole;
a leading shield disposed adjacent to a fourth surface of the main pole opposite the third surface, the leading shield comprising:
a first portion disposed adjacent to the first side shield;
a second portion disposed adjacent to the second side shield; and
a third portion disposed between the first portion and the second portion, and disposed adjacent to the fourth surface of the main pole;
a first insulation layer disposed adjacent to the third surface of the main pole; and
a second insulation layer comprising:
a first portion disposed over the first portion of the leading shield;
a second portion disposed between the first and second portions of the leading shield when viewed from a media facing surface; and
a third portion disposed over the second portion of the leading shield.
2. The magnetic recording head of claim 1 , wherein the first portion of the insulation layer divides the first side shield into two or more portions, and wherein the third portion of the second insulation layer divides the second side shield into two or more portions.
3. The magnetic recording head of claim 1 , further comprising a blocker layer disposed in contact with the third surface of the main pole.
4. A magnetic recording device comprising the magnetic recording head of claim 1 .
5. A magnetic recording head, comprising:
a main pole;
a first side shield disposed adjacent to a first surface of the main pole;
a second side shield disposed adjacent to a second surface of the main pole opposite the first surface;
a trailing shield disposed over the first side shield, the second side shield, and a third surface of the main pole;
a leading shield disposed adjacent to a fourth surface of the main pole opposite the third surface, the leading shield comprising:
a first portion disposed adjacent to the first side shield;
a second portion disposed adjacent to the second side shield; and
a third portion disposed between the first portion and the second portion, and disposed adjacent to the fourth surface of the main pole;
a first insulation layer disposed adjacent to the third surface of the main pole; and
a second insulation layer comprising:
a first portion disposed over the first portion of the leading shield;
a second portion disposed adjacent to the fourth surface of the main pole; and
a third portion disposed over the second portion of the leading shield,
wherein the trailing shield comprises:
a first portion disposed over the first side shield;
a second portion disposed over the second side shield, wherein the magnetic recording head further comprises a high moment seed layer disposed between the first and second portions of the trailing shield; and
a third portion disposed above each of the first portion of the trailing shield, the high moment seed layer, and the second portion of the trailing shield.
6. The magnetic recording head of claim 5 , wherein the first insulation layer is disposed between the third portion of the trailing shield and the high moment seed layer.
7. The magnetic recording head of claim 5 , wherein the first insulation layer is disposed over the first portion and the second portion of the trailing shield.
8. A magnetic recording device comprising:
a magnetic recording head, comprising:
a main pole;
a first side shield disposed adjacent to a first surface of the main pole;
a second side shield disposed adjacent to a second surface of the main pole opposite the first surface;
a trailing shield disposed over the first side shield, the second side shield, and a third surface of the main pole;
a leading shield disposed adjacent to a fourth surface of the main pole opposite the third surface, the leading shield comprising:
a first portion disposed adjacent to the first side shield;
a second portion disposed adjacent to the second side shield; and
a third portion disposed between the first portion and the second portion, and disposed adjacent to the fourth surface of the main pole;
a first insulation layer disposed adjacent to the third surface of the main pole; and
a second insulation layer comprising:
a first portion disposed over the first portion of the leading shield;
a second portion disposed adjacent to the fourth surface of the main pole;
a third portion disposed over the second portion of the leading shield; and
a control unit configured to cause a current to flow from the first side shield through the third portion of the leading shield to the second side shield.
9. A magnetic recording device comprising:
a magnetic recording head, comprising:
a main pole;
a first side shield disposed adjacent to a first surface of the main pole;
a second side shield disposed adjacent to a second surface of the main pole opposite the first surface;
a trailing shield disposed over the first side shield, the second side shield, and a third surface of the main pole;
a leading shield disposed adjacent to a fourth surface of the main pole opposite the third surface, the leading shield comprising:
a first portion disposed adjacent to the first side shield;
a second portion disposed adjacent to the second side shield; and
a third portion disposed between the first portion and the second portion, and disposed adjacent to the fourth surface of the main pole;
a first insulation layer disposed adjacent to the third surface of the main pole; and
a second insulation layer comprising:
a first portion disposed over the first portion of the leading shield;
a second portion disposed adjacent to the fourth surface of the main pole;
a third portion disposed over the second portion of the leading shield; and
a control unit configured to cause a current to flow from the second side shield through the third portion of the leading shield to the first side shield.
10. A magnetic recording head, comprising:
a main pole;
a first side shield disposed adjacent to a first surface of the main pole, the first side shield comprising a first portion and a second portion;
a second side shield disposed adjacent to a second surface of the main pole opposite the first surface, the second side shield comprising a first portion and a second portion;
a trailing shield disposed over a third surface of the main pole;
a leading shield disposed adjacent to a fourth surface of the main pole opposite the third surface; and
a first insulation layer comprising:
a first portion disposed between the first portion and the second portion of the first side shield; and
a second portion disposed between the first portion and the second portion of the second side shield.
11. The magnetic recording head of claim 10 , wherein the leading shield comprises:
a first portion disposed adjacent to the first side shield;
a second portion disposed adjacent to the second side shield; and
a third portion disposed between the first portion and the second portion.
12. The magnetic recording head of claim 11 , wherein the first insulation layer further comprises:
a third portion disposed between the first portion and the third portion of the leading shield; and
a fourth portion disposed between the second portion and the third portion of the leading shield.
13. The magnetic recording head of claim 10 , further comprising a second insulation layer disposed between the main pole and the trailing shield.
14. The magnetic recording head of claim 13 , wherein the second insulation layer divides the trailing shield into two or more portions.
15. The magnetic recording head of claim 10 , further comprising a blocker layer disposed in contact with the third surface of the main pole.
16. The magnetic recording head of claim 10 , further comprising a low resistance layer disposed over a third surface of the main pole.
17. A magnetic recording device comprising the magnetic recording head of claim 10 .
18. A magnetic recording head, comprising:
a main pole;
a first side shield disposed adjacent to a first surface of the main pole;
a second side shield disposed adjacent to a second surface of the main pole opposite the first surface;
a trailing shield disposed over the first side shield, the second side shield, and a third surface of the main pole;
a leading shield disposed adjacent to a fourth surface of the main pole opposite the third surface, the leading shield comprising:
a first portion disposed adjacent to the first side shield;
a second portion disposed adjacent to the second side shield; and
a third portion disposed between the first portion and the second portion, and disposed adjacent to the fourth surface of the main pole;
a first insulation layer disposed adjacent to the third surface of the main pole; and
a second insulation layer comprising:
a first portion disposed over the first portion of the leading shield;
a second portion disposed adjacent to the fourth surface of the main pole; and
a third portion disposed over the second portion of the leading shield, wherein the first portion of the second insulation layer divides the first side shield into two or more portions, and wherein the third portion of the second insulation layer divides the second side shield into two or more portions.
19. The magnetic recording head of claim 18 , further comprising a blocker layer disposed in contact with the third surface of the main pole.
20. The magnetic recording head of claim 18 , further comprising a low resistance layer disposed over the third surface of the main pole.
21. A magnetic recording device comprising the magnetic recording head of claim 18 .
22. The magnetic recording device of claim 21 , further comprising:
a control unit configured to cause a current to flow from the first side shield through the third portion of the leading shield to the second side shield.
23. The magnetic recording device of claim 21 , further comprising:
a control unit configured to cause a current to flow from the second side shield through the third portion of the leading shield to the first side shield.