Magnetic writer having a dual side gap
AssigneeWestern Digital (Fremont), LLC
InventorsFeng Liu, Zhanjie Li, Tao Pan, Zhigang Bai
Life of this patent
Estimating the term…
Abstract
A magnetic transducer has air-bearing surface (ABS) and includes a main pole, at least one coil, a side shield and a side gap. The coil(s) energize the main pole. A portion of the main pole resides at the ABS. The side gap is between the main pole and the side shield. The side gap is nonmagnetic and includes a first side gap and a second side gap. The first side gap is conformal with the main pole. The second side gap is conformal with the main pole. The first side gap is between the second side gap and the ABS. The second side gap is wider than the first side gap.
Claims17
A magnetic transducer having air-bearing surface (ABS) comprising:
- a main pole, a portion of the main pole residing at the ABS;
- at least one coil configured to energize the main pole;
- a side shield;
- and
- a side gap between the main pole and the side shield, the side gap being nonmagnetic, the side gap including a first side gap and a second side gap, the first side gap being conformal with the main pole, the second side gap being conformal with the main pole, the first side gap being between the second side gap and the ABS, the second side gap being wider than the first side gap, the first side gap having a first width, the second side gap has a second width at least twice the first width, the second width being not more than sixty nanometers greater than the first width;
- wherein the first side gap terminates not more than one hundred nanometers from the ABS.
A data storage device comprising:
- a media;
- a slider including a magnetic recording transducer having an air-bearing surface (ABS), a main pole, a side gap, a side shield and at least one coil configured to energize the main pole, the side gap between the main pole and the side shield, the side gap being nonmagnetic, the side gap including a first side gap and a second side gap, the first side gap being conformal with the main pole, the second side gap being conformal with the main pole, the first side gap being between the second side gap and the ABS, the second side gap being wider than the first side gap, the first side gap having a first width, the second side gap has a second width at least twice the first width, the second width being not more than sixty nanometers greater than the first width;
- wherein the first side gap terminates not more than one hundred nanometers from the ABS.
A method for providing a magnetic transducer having air-bearing surface (ABS) comprising:
- providing a main pole, a portion of the main pole residing at the ABS;
- providing at least one coil for energizing the main pole;
- providing a side shield;
- and
- providing a side gap between the main pole and the side shield, the side gap being nonmagnetic, the side gap including a first side gap and a second side gap, the first side gap being conformal with the main pole, the second side gap being conformal with the main pole, the first side gap being between the second side gap and the ABS, the second side gap being wider than the first side gap, the first side gap having a first width, the second side gap has a second width at least twice the first width, the second width being not more than sixty nanometers greater than the first width;
- wherein the first side gap terminates not more than one hundred nanometers from the ABS.
Dependencies are inferred from the claim text.