Shingle magnetic writer having nonconformal shields
View Patent ↗A shingle magnetic write apparatus is described. The shingle magnetic write apparatus includes a pole, a side gap, a write gap, a top shield and side shield(s). The pole has a pole tip region including a top wider than a bottom, and sides. The sides are at a sidewall angle from a down track direction. The write gap is adjacent to the pole top and between the top shield and the pole top. The side shield(s) are magnetically connected with the top shield and extend past the bottom of the pole. The side gap is between the side shield(s) and the pole. The side shield(s) have pole-facing surface(s) not more than a side shield angle from the down track direction. The side shield angle is less than the sidewall angle. The side gap width increases from the top near the gap to the bottom near the bottom of the pole.
1. A shingle magnetic write apparatus comprising:
a pole having a pole tip region including a bottom, a top wider than the bottom, a first side and a second side at a sidewall angle from a down track direction;
a side gap adjacent to at least the first side and the second side;
a write gap adjacent to the top of the pole;
a top shield, the write gap being between the top shield and the top of the pole; and
at least one side shield being magnetically connected with the top shield and extending past the bottom of the pole tip region, the side gap being between the at least one side shield and the pole, the at least one side shield having at least one pole-facing surface at a side shield angle from the down track direction, the side shield angle being less than the sidewall angle, being not more than five degrees, and being not less than two degrees from the down track direction.
2. The shingle magnetic write apparatus of claim 1 wherein the side gap has a width and wherein the side shield angle is not more than one-half of the sidewall angle such that the width of the side gap monotonically increases from the top of the pole toward the bottom of the pole.
3. The shingle magnetic write apparatus of claim 2 wherein the side shield angle is not more than one-third of the sidewall angle.
4. The shingle magnetic write apparatus of claim 2 further comprising:
a bottom shield; and
a bottom gap residing between the bottom shield and the bottom of the pole, the bottom gap having a height greater than the width of the side gap.
5. The shingle magnetic write apparatus of claim 4 wherein the bottom shield is magnetically coupled with the at least one side shield.
6. The shingle magnetic write apparatus of claim 1 wherein the sidewall angle is not more than fifteen degrees and at least four degrees.
7. The shingle magnetic write apparatus of claim 6 wherein the sidewall angle is not more than nine degrees.
8. The shingle magnetic write apparatus of claim 6 wherein the sidewall angle is at least twelve degrees.
9. A data storage device comprising:
a media;
a slider having an air-bearing surface (ABS) and a shingle magnetic write transducer, the shingle magnetic write transducer including a pole, a side gap, a write gap, a top shield and at least one side shield magnetically connected with the top shield, the pole having a pole tip region including a bottom, a top wider than the bottom, a first side and a second side at a sidewall angle from a down track direction, the side gap being adjacent to at least the first side and the second side, the write gap being adjacent to the top of the pole, the write gap being between the top shield and the top of the pole, the at least one side shield being magnetically connected with the top shield and extending past the bottom of the pole tip region, the side gap being between the at least one side shield and the pole, the at least one side shield having at least one pole-facing surface at a side shield angle from the down track direction, the side shield angle being not more than one-third of the sidewall angle, being not less than two degrees and being not more than five degrees.
10. The data storage device of claim 9 wherein the side gap has a width and wherein the shingle magnetic write transducer further includes:
a bottom shield; and
a bottom gap residing between the bottom shield and the bottom of the pole, the bottom gap having a height greater than the width of the side gap.
11. A method for fabricating a magnetic write apparatus comprising:
providing a pole having a pole tip region including a bottom, a top wider than the bottom, and a plurality of sides comprising a first side and second side at a sidewall angle from a down track direction;
providing a side gap adjacent to at least the first side and the second side;
providing a write gap adjacent to the top of the pole;
providing a top shield, the write gap being between the top shield and the top of the pole; and
providing at least one side shield magnetically connected with the top shield and extending past the bottom of the pole tip region, the side gap being between the at least one side shield and the pole, the at least one side shield having at least one pole-facing surface at a side shield angle from the down track direction, the side shield angle being less than the sidewall angle, being not less than two degrees and being not more than five degrees.
12. The method of claim 11 wherein the side gap has a width and wherein the side shield angle is not more than one-half of the sidewall angle such that the width of the side gap monotonically increases from the top of the pole toward the bottom of the pole.
13. The method of claim 12 wherein the side shield angle is not more than one-third of the sidewall angle.
14. The method of claim 12 further comprising:
providing a bottom shield; and
providing a bottom gap between the bottom shield and the bottom of the pole, the bottom gap having a height greater than the width of the side gap.
15. The method of claim 14 wherein the bottom shield is magnetically coupled with the at least one side shield.