PERPENDICULAR MAGNETIC RECORDING HEAD AND METHOD OF MANUFACTURING THE SAME
First Claim
Patent Images
1. A perpendicular magnetic recording (PMR) head comprising:
- a main pole;
a coil which encloses the main pole as a solenoid type to allow the main pole to generate a magnetic field required for recording data on a recording medium; and
a return yoke which forms a magnetic path of a magnetic field together with the main pole and which has a throat disposed opposite the main pole with a gap between the return yoke and the main pole,wherein one end of the gap disposed near an air bearing surface (ABS) is thinner than the other end of the gap, such that the throat tapers from the other end of the gap to the one end of the gap.
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Abstract
A perpendicular magnetic recording (PMR) head and a method of manufacturing the same are provided. The PMR head includes: a main pole; a coil enclosing the main pole as a solenoid type to allow the main pole to generate a magnetic field required for recording data on a recording medium; and a return yoke forming a magnetic path of a magnetic field together with the main pole and having a throat disposed opposite the main pole with a gap between the return yoke and the main pole. One end of the gap disposed near an air bearing surface (ABS) is thinner than the other end of the gap, such that the throat tapers from the other end of the gap to the one end of the gap.
37 Citations
17 Claims
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1. A perpendicular magnetic recording (PMR) head comprising:
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a main pole; a coil which encloses the main pole as a solenoid type to allow the main pole to generate a magnetic field required for recording data on a recording medium; and a return yoke which forms a magnetic path of a magnetic field together with the main pole and which has a throat disposed opposite the main pole with a gap between the return yoke and the main pole, wherein one end of the gap disposed near an air bearing surface (ABS) is thinner than the other end of the gap, such that the throat tapers from the other end of the gap to the one end of the gap. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of manufacturing a perpendicular magnetic recording (PMR) head comprising a main pole, a coil enclosing the main pole as a solenoid type, and a return yoke having a throat disposed opposite the main pole with a gap between the return yoke and the main pole, the method comprising:
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sequentially forming a lower coil layer, the main pole, and a first insulating layer; forming an upper coil layer on the first insulating layer; forming a second insulating layer on the upper coil layer; etching the first and second insulating layers such that one end of the gap disposed near an air bearing surface (ABS) is thinner than the other end of the gap; and forming the return yoke having the throat disposed opposite the gap. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A perpendicular magnetic recording (PMR) head comprising:
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a main pole; a single turn coil which surrounds the main pole; and a return yoke having a first portion disposed on the main pole and a second portion which is spaced apart from the main pole to form a gap, wherein one end of the gap disposed near an air bearing surface (ABS) is thinner than an opposite end of the gap. - View Dependent Claims (14, 15, 16, 17)
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Specification