JPS619812A - Vertical magnetic recording and reproducing head - Google Patents

Abstract

PURPOSE:To realize pure vertical recording and high reproduced output with a single head chip by forming a vertical head only for recording and a ring head only for reproducing on the single head chip. CONSTITUTION:When this single head chip is applied to a floating head for a vertical fixed magnetic disc device, a vertical head 2 only for recording is formed on the end face of one ski 4, and a ring head 3 only for reproducing is formed on the end face of the other ski 4. By this head chip, the vertical head is used for recording to realize pure vertical recording, and the ring head of high reproducing efficiency is used for reproducing to obtain a large reproduced output. Since the vertical head for recording and the ring head for reproducing are formed on the single head chip as one body, the cost is reduced in comparison with the case where two heads independent of each other are set to one carriage.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a recording/reproducing head in a perpendicular magnetic recording device.

[Technical background of the invention and its problems]

Perpendicular magnetic recording has been attracting a lot of attention in recent years as a peak method because it allows for a dramatic increase in recording density compared to conventional longitudinal recording. At present, there are two types of heads for symbol reproduction: a single-magnetic vertical head (referred to as a post-μ vertical head) and a ring-type head (referred to as a ring head hereinafter). is being considered.

When recording and reproducing are performed using a combination of a perpendicular magnetic medium and a perpendicular head, complete perpendicular magnetization dislocation occurs on the medium and pure perpendicular recording can be achieved, but since the perpendicular head has an open magnetic path structure, The disadvantage is that the regeneration efficiency is low and only a very small regeneration output can be obtained.

On the other hand, if a perpendicular recording medium and a ring head are combined, reproduction can be performed efficiently, but since the magnetic field generated by the ring head during recording includes a strong longitudinal component, complete perpendicular magnetization dislocations cannot be formed on the medium. First, there is a drawback that pure perpendicular recording cannot be realized.

In consideration of the above two drawbacks, recording is performed using a vertical head,
It is also possible to achieve pure perpendicular recording and obtain high reproduction output by reproducing using a ring head. However, in terms of practical use, the cost is high due to mounting two different head chips on one carriage.
There are various disadvantages such as a decrease in the recording area on the medium, an increase in the weight of the carriage, and furthermore, difficulty in hand positioning due to thermal changes in the distance between the two heads.

[Purpose of the invention]

The present invention improves the drawbacks of the conventional perpendicular magnetic recording/reproducing head described above, and enables perpendicular magnetic recording to achieve pure perpendicular recording and high reproduction output without mounting multiple head chips on one carriage. The purpose is to provide a playback head.

[Summary of the invention]

The present invention is a perpendicular magnetic recording/reproducing head that achieves pure perpendicular recording and high reproduction output with a single head chip by forming a recording-only vertical head and a reproduction-only ring head on a single head chip. It has been made possible.

〔Effect of the invention〕

According to the present invention, pure perpendicular recording and high playback output can be achieved without providing a plurality of Herad chips.

As a result, a high-performance perpendicular magnetic recording device can be realized.

[Embodiments of the invention]

Examples of the present invention will be described in detail below.

FIG. 1 shows one embodiment of the present invention, and is a perspective view of a Herad chip in which the present invention is applied to a floating head for a vertically fixed magnetic disk device. 1 indicates a head tip and 4 indicates a head slider ski. A recording-only vertical head 2 is formed on the end surface of one ski 4, and a reproduction-only ring head 3 is formed on the end surface of the other ski 4.

By configuring the head chip like this.

During recording, a vertical head is used to achieve pure perpendicular recording, and during playback, a ring head with high playback efficiency is used to achieve large playback output.

In addition, by integrally forming the recording vertical head and the reproducing ring head on a single HAD chip, costs can be reduced compared to the case where two independent heads are mounted on one carriage. Can minimize area reduction, prevent increase in carriage weight,
Furthermore, since there is almost no thermal change in the distance between recording and reproducing image heads, head positioning can be made easier, and various other disadvantages can be eliminated.

[Other embodiments of the invention]

FIG. 2 shows another embodiment of the Yang Kai in which the present invention is applied to a floating head for a vertically fixed magnetic disk device.

In the example shown here, two vertical recording heads 5 and two reproducing ring heads 6 are formed close to one end face of the slider ski 7 on a single head chip 8. By doing this, the reduction in the recording area on the medium can be further suppressed, and the interval between the recording and reproducing image heads can also be made finer, making it possible to perform further easy positioning.

FIGS. 3 and 4 show an embodiment of the present invention applied to a head for a vertical 70-knobby disk device. Both FIGS. 3 and 4 are plan views C of the head chips 9 and 10 viewed from the side of the contact surface with the medium. In FIGS. 3 and 4, 11 and 14 are vertical heads for recording, 12 and 15 are ring heads for reproduction, and 13 (!: 16 is a tunnel erase head. As shown in FIG. 3, each head is If the head is arranged as shown in Fig. 4, the same effect as that of the floating head for a vertical fixed magnetic disk device can be obtained, and if the head is arranged as shown in Fig. 4, the recording area will not be reduced at all, and furthermore, the There is no need to change the head position during playback.

FIG. 5 shows an actual #l and l when the present invention is applied to a head for a perpendicular magnetic tape device. FIG. 5 is a plan view of the head chip 17 viewed from the side of the contact surface with the medium. Reference numeral 18 indicates an i6 head for recording, and reference numeral 19 indicates a ring head for reproduction. By arranging the head in this way, pure perpendicular recording and high playback output can be achieved with just one head chip.

In the above embodiments of the present invention, the same effect can be expected even if the position of the recording vertical head and the position of the reproducing ring head are reversed. However, if there is a tunnel erase head, the tunnel erase head must always be located at a later stage than the write head with respect to the traveling direction of the medium.

Further, in the embodiment, only one case has been described in which there is one recording head and one reproduction ring head, but the same effect can be expected even if one or more of both heads is used.

Furthermore, it is also possible to apply the present invention to magnetic recording devices other than those shown here.

[Brief explanation of drawings]

Figures 1 and 2 are perspective views of an example of a floating head for a vertically fixed magnetic disk device to which the present invention is applied, and Figures 3 and 4 are perspective views of an example of a vertical floppy chip, respectively. A plan view of an example of a head chip seen from the medium contact surface when the head chip is used as a durable head of the head device,
FIG. 5 is a plan view of an example of a Herad chip seen from the medium contact surface when the present invention is applied to a head for a perpendicular magnetic tape device. 2, 5, 11. , 1.4, 18... recording-only single-pole head, 3, 6, 12, ], 5, 19
...Reproduction-only ring head, ], , 9, 10
, 17...head chip. Representative Patent Attorney Nori Chika (8 (1 idiot) Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] A perpendicular magnetic recording/reproducing head for a perpendicular magnetic recording device, characterized in that a single magnetic pole head for recording only and a ring head for reproducing only are mounted on a single head chip.