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Magnetic head and magnetic recording and reproducing apparatus

A technology of reproducing device and magnetic head, applied in the direction of magnetic recording, magnetic recording head, recording/reproducing/deleting method, etc., can solve the problems of reduced shielding effect, manufacturing problems, end position error, etc.

Inactive Publication Date: 2006-05-10
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, in a magnetic head having such a structure, an increase in the amount of recess of the shield reduces the shielding effect, which significantly affects resistance to an external magnetic field.
This makes the error in the position of the end very serious, which can cause problems in manufacturing

Method used

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  • Magnetic head and magnetic recording and reproducing apparatus
  • Magnetic head and magnetic recording and reproducing apparatus
  • Magnetic head and magnetic recording and reproducing apparatus

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Embodiment Construction

[0017] Embodiments of the present invention will be described below with reference to the accompanying drawings.

[0018] figure 1 is a sectional view taken along a track of a magnetic recording and reproducing apparatus according to an embodiment of the present invention. Such as figure 1 As shown, the magnetic recording and reproducing apparatus has a perpendicular magnetic recording medium 10 and a magnetic head 20 , and the magnetic head 20 is located above the perpendicular magnetic recording medium 10 . The perpendicular magnetic recording medium 10 has a soft underlayer 12 and a perpendicular magnetic recording layer 13 disposed on a non-magnetic substrate 11 . An additional underlayer may be provided between the nonmagnetic layer 11 and the soft underlayer 12 , and an intermediate layer may be provided between the soft underlayer 12 and the perpendicular magnetic recording layer 13 . In general, a protective layer is provided on the perpendicular magnetic recording ...

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Abstract

A magnetic head, comprising: a read head (30), the read head includes a read element (31) and two layers of shielding (32), the read element (31) is sandwiched between the two layers of shielding (32) between; a writing head (40), which includes a main pole (41), a return yoke (42) and an excitation coil (43), wherein each shield (32) and return yoke (42) At least one of the bottom surface areas is at least 1.2 times the top surface area.

Description

technical field [0001] The present invention relates to a magnetic head and a magnetic recording and reproducing apparatus. Background technique [0002] Magnetic heads currently used in hard disk drives (HDDs) have a read head that includes a read element, such as a giant magnetoresistive (GMR), and two shields that sandwich the read element. In the middle; a writing head comprising a main pole, a return yoke and a field coil. In other known constructions there is an additional shield for the writing head. Among these elements, for example, the main pole is usually processed to have a complex shape in order to improve writing efficiency. However, the shape of these shielding or restoring yokes is not specifically considered, and thus, the shielding and restoring yokes are processed in a rectangular shape because the rectangular shape is easy to process. [0003] However, if an external stray field is present, a magnetic film such as a shield can act like an antenna to co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B5/127G11B5/02G11B5/11G11B5/39
CPCG11B5/35
Inventor 高岸雅幸山本耕太郎田口知子
Owner KK TOSHIBA
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