MAGNETIC HEAD AND MAGNETIC DISK SYSTEM HAVING THE SAME
First Claim
1. A magnetic head, comprising:
- a main pole;
a coil for exciting the main pole;
a trailing shield disposed at the trailing side of the main pole; and
a read sensor disposed between the main pole and the trailing shield.
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Accused Products
Abstract
A read sensor is disposed near a main pole, thereby reducing the distance between the read sensor and a write sensor. In this case, however, a magnetic field generated from the main pole affects magnetization of a free layer and a pinned layer of a magnetoresistive film, thereby causing the magnetizing directions to rotate, a magnetic barrier to be generated, and the read property to be degraded. According to the present invention, a main pole and a yoke configure a magnetic circuit together with a sub-pole and a soft magnetic under layer of the magnetic disk and an exciting coil magnetizes the magnetic circuit, thereby a recording magnetic field is applied to a recording layer to record information bits on the layer. And in order to sharpen the magnetic field distribution generated by the main pole, a trailing shield made of a ferromagnetic material is disposed at the trailing side of the main pole adjacently. And a read sensor (magnetoresistive element) for reading bit information is provided between the trailing shield and the main pole.
32 Citations
20 Claims
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1. A magnetic head, comprising:
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a main pole; a coil for exciting the main pole; a trailing shield disposed at the trailing side of the main pole; and a read sensor disposed between the main pole and the trailing shield. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A magnetic disk drive, comprising:
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a perpendicular magnetic recording medium; and a magnetic head that includes a main pole; a coil for exciting the main pole; a trailing shield disposed at the trailing side of the main pole; and a read sensor disposed between the main pole and the trailing shield. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification