KR20000002261A - Magnetic recordind head - Google Patents

Abstract

PURPOSE: A magnetic recording head is provided to increase magnetic flux to moving direction and to diminish magnetic flux to vertical direction. CONSTITUTION: The magnetic recording head comprises at least one magnetic pole having a step to increase the magnetic flux to the moving direction between two magnetic poles. Thereby, it is possible to improve a property of inductive recording head which is a limit of track density in inductive magnetic recording complex head, then has advantage to increase a recording density of magnetic head.

Description

Magnetic recording head

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic recording head employed in a hard disk drive or the like, and more particularly to a magnetic recording head structurally improved to increase the effective magnetic flux between magnetic poles.

The hard disk drive is one of the auxiliary storage devices of the computer, and contributes to the operation of the computer by reading and playing data stored on the magnetic disk by the magnetic head or recording data on the magnetic disk.

In order to meet the demand of high speed, high capacity, and low vibration, such a hard disk drive has been variously developed. In particular, research on a bearing structure supporting a rotating body for high speed and low vibration has been actively conducted.

1 is a plan view schematically showing the configuration of a general hard disk drive.

Referring to FIG. 1, the hard disk drive 100 includes a base housing 101, a magnetic disk (hard disk) 102 for storing data, and data written or recorded on the magnetic disk 102. And a voice coil motor 104 that provides a driving force for reciprocating the head stack assembly 103 and the head stack assembly 103 in the radial direction of the magnetic disk 102. have.

The magnetic disk 102 generally has a stacking structure of two to four sheets, and its surface has a parking area 102r on which data is recorded and a parking where the magnetic head 103h rests when the rotation of the disk 102 is stopped. parking) area 102p. The head stack assembly 103 is installed pivotably around a pivot 103p and has an actuator 103a constituting a main body portion and a plate-shaped rod having an elastic force connected to the actuator 103a. To a magnetic beam 103h fixed to a load beam 103b and an end of the load beam 103b to read data recorded on the magnetic disk 102 or to write data to the magnetic disk 102. Consists of.

In addition, at one end of the actuator 103a in the opposite direction to the magnetic head 103h, the damper 105d and the magnetic plate 105m are used to stably fix the magnetic head 103h to the parking area 102p. The configured latch pin 105 is provided. Then, on the movement track of the latch pin 105, the latch housing 106 coupled with the latch pin 105, and the magnetic head 103h when the head stack assembly 103 rotates to the outside of the magnetic disk 102. The latching jaw 107 is provided to stop the rotation of the latch pin 105 so as not to leave the recording area 102r.

On the other hand, in the hard disk drive having the above configuration, when the magnetic head 103h has a structure, as shown in FIG. 2, the upper structure 201 and the lower magnetic pole 202 have a face structure having substantially the same width. As shown in FIG. 5, the magnetic flux H flows in a semicircular shape. At this time, when the magnetic head 103h magnetizes the magnetic disk 102 in a stationary state, magnetization in the vertical direction is not performed. However, when the magnetic head 103h and the magnetic disk 102 move relative to each other, the magnetic disk 102 Passing from the lower magnetic pole 202 to the upper magnetic pole 201, in the position B and C of Fig. 5, the magnetic flux in the side of the track is in the vertical direction and the magnetization is changed in the vertical direction. In order to cope with such a problem, or to prevent the increase in track width due to the difference between the upper magnetic pole 201 and the lower magnetic pole 202 in the manufacture of the magnetic head, the beveled as shown in FIG. ), But the magnetic flux is not sufficiently changed in the direction of progress, so the effect is not achieved. In FIG. 3, reference numeral 301 denotes an upper stimulus and 302 denotes a lower stimulus, respectively.

The present invention has been made in view of the above problems, and an object thereof is to provide a magnetic recording head in which a means capable of increasing the magnetic flux in the traveling direction and reducing the magnetic flux in the vertical direction is provided.

1 is a plan view schematically showing the configuration of a typical hard disk drive.

2 is a schematic configuration diagram of a conventional magnetic recording head.

3 is a schematic configuration diagram of another conventional magnetic recording head.

4 is a schematic structural diagram of a magnetic recording head according to the present invention;

Fig. 5 is a flow chart of magnetic flux in a conventional magnetic recording head.

6 is a flow chart of magnetic flux in a magnetic recording head according to the present invention;

7A to 7C are magnetic field characteristic curves in the X and Y directions showing magnetic field characteristics in the conventional magnetic recording head for each position.

8A to 8C are magnetic field characteristic curves in the X and Y directions showing magnetic field characteristics in the magnetic recording head according to the present invention at each position.

<Explanation of symbols for main parts of the drawings>

101 ... base housing 102 ... magnetic disc

103 ... head stack assembly 103a ... actuator

103b ... load beam 103h ... magnetic head

103p ... Pivot 104 ... Voice Coil Motor

105 ... Latch pin 105d ... Damper

105m ... Magnetic Plate 106 ... Latch Housing

107.

In order to achieve the above object, in the magnetic recording head according to the present invention, a magnetic recording head having an upper magnetic pole and a lower magnetic pole includes a step so that at least one of the two magnetic poles can increase the influence of the magnetic flux in the traveling direction. The feature is that the branch has a structure.

According to the present invention as described above, the magnetic flux in the vertical direction is reduced, and only the magnetic flux in the advancing direction used for actually recording data remains, thereby increasing the effective track width. Therefore, in the case of the inductive magnetic recording composite head, the characteristics of the inductive recording head, which is the biggest limit in increasing the track density, can be greatly improved, and thus, the recording density of the entire magnetic head can be increased.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 is a schematic configuration diagram of a magnetic recording head according to the present invention.

Referring to FIG. 3, the magnetic recording head 400 according to the present invention includes an upper magnetic pole 401 and a lower magnetic pole 402 which is provided to face the upper magnetic pole 401. Here, in particular, the lower magnetic pole 402 has a first surface portion 402b directly facing the same width as the upper magnetic pole 401 as shown, and has a step height of a predetermined height with the first surface portion 402b. It is composed of a second surface portion 402a continuously formed in a step shape with a wider width than the first surface portion 402b. At this time, such a step structure is not necessarily limited to the lower magnetic pole 402 as in the present embodiment, and in some cases, the upper magnetic pole 401 may be a stepped structure, and the upper and lower magnetic poles 401 ( All of the 402 may have a stepped structure.

In the magnetic recording head 400 of the present invention having the structure as described above, the lower magnetic pole 402 has a stepped structure, and as shown in FIG. 6, the magnetic flux does not flow to the side of the lower magnetic pole 402, and the lower magnetic pole ( The magnetic field in the vertical direction is prevented from flowing to the second surface portion 402a of the 402. Therefore, even if the magnetic disk 102 passes, only the magnetic field in the traveling direction remains, so that only the magnetization in the traveling direction remains in the magnetic disk 102, and the magnetization in the vertical direction becomes relatively small.

8A to 8C show the above magnetic field characteristics for each position. FIG. 8A is a line A of FIG. 6, FIG. 8B is a line B of FIG. 6, and FIG. 8C is a line X of FIG. 6. Magnetic field characteristic curve in Y direction.

In the magnetic recording head structure according to the present invention, as shown in the comparison between the magnetic field characteristics of FIGS. 8A to 8C and the magnetic field characteristics in the X and Y directions by the conventional magnetic recording heads of FIGS. 7A to 7C (particularly FIGS. 7C and 8C) It can be seen that the magnetic flux in the vertical direction is reduced.

As described above, the magnetic recording head according to the present invention has a structure in which at least one of the two magnetic poles has a step so that the magnetic flux in the vertical direction is reduced, leaving only the magnetic flux in the traveling direction used for actually recording data. This increases the effective track width. Therefore, in the case of the inductive magnetic recording composite head, the characteristic of the inductive recording head, which is the biggest limit in increasing the track density, can be greatly improved, and thus, the recording density of the entire magnetic head can be increased. In addition, when an erased band is generated when recording a servo signal, a dead band of the servo signal is formed, which degrades the servo performance. In the case of the head of the present invention, the servo signal is generated sufficiently linearly so that the servo You can even improve performance.

Claims (2)

A magnetic recording head having an upper magnetic pole and a lower magnetic pole, At least one of the two magnetic poles is a magnetic recording head, characterized in that the structure having a step so as to increase the influence of the magnetic flux in the traveling direction. The method of claim 1, The lower magnetic pole is a first surface portion directly facing the same width as the upper magnetic pole, and a second surface portion continuously formed in a step shape with a relatively wider width than the first surface portion with a step of a predetermined height with the first surface portion. A magnetic recording head, characterized in that.