JPS60182508A - Vertical magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To facilitate the easy production of a miniaturized vertical magnetic recording/reproducing device with reduction of number of component parts and cost, by forming a main magnetic pole within a slider which functions to keep a fixed distance between a recording medium and its counter surface. CONSTITUTION:A main magnetic pole 15 is provided on both sides of a recording medium 13 respectively together with an auxiliary magnetic pole 16 set opposite to each pole 15. Thus the recording/reproduction is possible simultaneously on both sides of the medium 13 in an optional combination. Furthermore the medium 13 slides over a sliding surface 19 protruded by a distance P from a counter surface 18 of the pole 16 when the recording/reproduction is carried out. Therefore the gap between the medium 13 and the surface 18 is always kept at P (0<P<=0.2mm.). This value of the distance P can prevent the misreproduction of a recording/erasion/reproduction mode to a magnetized film 12 at the side of a surface to be recorded in a recording mode. Thus the recording/reproduction is possible with high efficiency.

Description

TECHNICAL FIELD OF THE INVENTION The present invention relates to a perpendicular magnetic recording/reproducing head for performing perpendicular magnetic recording on a recording medium and perpendicular magnetic reproduction of the recording medium.

Technical Background and Problems of the Invention Recently, perpendicular magnetic recording and reproducing methods have been considered as a means of magnetic recording and reproducing, in which recording and reproducing are performed in the perpendicular direction of a recording medium in order to improve high-density recording characteristics. . For example, as shown in FIG.
The main magnetic pole (
3), and an auxiliary magnetic pole (4) made of a soft magnetic material that faces the main magnetic pole (3) with the recording medium (1) in between, and a winding (5) around the tip of the auxiliary magnetic pole (4). )′f:
There is something that looks like it is rolled up. With this configuration, when a signal current is applied to the winding (5), the auxiliary magnetic pole (4) generates magnetic flux, and this magnetic flux is concentrated on the main magnetic pole (3), so that it comes into contact with the main magnetic pole (3). Magnetized film (2) K performs perpendicular magnetic recording. Also, the recorded magnetized film (2) is the main magnetic pole (3)
It is magnetized to generate magnetic flux, and this magnetic flux is transmitted to the winding (5) as a signal current to perform perpendicular magnetic reproduction. At this time, if the auxiliary magnetic pole (4) comes into contact with the recording medium (1), there is a high possibility that recording/erasing or erroneous reproduction will occur on the magnetized film (2) on the recording surface side.

Furthermore, if the gap between the auxiliary magnetic pole (4) and the recording medium (1) is too wide, the output will be small9 and satisfactory recording and reproduction will not be possible. Therefore, the auxiliary magnetic pole (4) and the recording medium (
1) must always have a predetermined value p.

The specific numerical value of this predetermined value p is 0<p≦0.2
+nm.

For this reason, the auxiliary magnetic pole (6) and the sliding body (7) made of a magnetic material are integrally formed, and the entire sliding surface (8) of the sliding body (7) is recorded on the auxiliary magnetic pole (6). Medium facing surface (9
) has been proposed, as shown in FIG. With such a configuration, recording and reproduction are performed while the recording medium (1) slides on the sliding surface (8). Therefore, the air gap between the auxiliary magnetic pole (6) and the recording medium (1) is always the distance p
Therefore, recording on the magnetized film (2) on the recording surface side is not possible.
This prevents erasure and erroneous playback.

On the other hand, magnetized films (2) are formed on both sides of the recording medium (1). Therefore, two different pieces of information can be recorded at the same time.
It has been considered to make it possible to continue recording and reproducing without reversing the recording medium (1) after recording and reproducing on one side. An example of this is:
There is a device as shown in FIG. 3 in which two perpendicular magnetic recording/reproducing heads are provided and the direction of one is reversed with the entire center of the recording medium (1). With this kind of configuration, the recording medium (1
) recording and playback can be performed simultaneously on both sides. However, since two perpendicular magnetic recording/reproducing heads aQ, which should be used alone, are used, it becomes too sacred, and there is a limit to miniaturization, and there are disadvantages such as a large number of parts used and high costs. there were.

Purpose of the Invention The present invention has been made in view of the above points, and provides a perpendicular magnetic recording and reproducing head that can simultaneously record and reproduce data on both sides of a recording medium while always keeping the air gap between the recording medium and the auxiliary magnetic pole at a desired value. The purpose is to miniaturize and make it easy to manufacture at low cost.

Summary of the Invention This invention provides one auxiliary magnetic pole on each side of a recording medium, and a sliding surface that is integral with these auxiliary magnetic poles and protrudes by a predetermined distance from the recording medium facing surface of these auxiliary magnetic poles and contacts the recording medium. A main magnetic pole is formed in these sliding bodies so that the tip surface of the main magnetic pole and the sliding surface are in the same plane, and the main magnetic pole and the auxiliary magnetic pole are opposed to each other with a recording medium in between. This allows recording and recording on both sides of the recording medium at the same time while always keeping the air gap between the recording medium and the auxiliary magnetic pole at a desired value.
The perpendicular magnetic recording/reproducing head capable of reproducing can be made smaller by reducing the number of parts, and is configured to be easily manufactured at low cost.

Examples of the invention A first embodiment of this invention will be described based on FIG.

This perpendicular magnetic recording/reproducing head α force has a magnetic film α2 on both sides.
It is made up of two identical members that sandwich a recording medium α3 having .

First, only one member will be explained. A main magnetic pole αυ having a tip end face α4 in contact with the magnetized film α2 is provided on one side of the recording medium αJ, and an auxiliary magnetic pole αQ is provided in parallel with the main magnetic pole αυ. A winding wire is wound around the outer periphery of the tip of the auxiliary magnetic pole αG, and an opposing surface αC is formed on the surface of the auxiliary magnetic pole αd that faces the recording medium αJ. A sliding body (C) having a sliding surface α projecting a distance p toward the recording medium α3 from the opposing surface 0→ is fixed on both sides of the auxiliary magnetic pole αG. The materials of these sliding bodies (1) include high hardness ceramic, x
, (A120s, A120a-Tic.

SiC, TiC, etc.), crystallized glass, and glassy carbon are used. Furthermore, one of the sliding bodies is divided into a base part 123) and a sub-part (A) using the sliding surface (2) as a water-shedding point, and the base part Qη and the sub-part (C) are The main magnetic pole (to) is formed in between by sputtering. Note that the tip surface α→ of the main magnetic pole (to) and the sliding surface αω are located in the same plane.

Next, two identical devices configured as described above are provided, and these are placed facing each other with the recording medium 0j interposed therebetween. At this time, one of the main magnetic poles a9 and the other of the auxiliary magnetic poles α0 are configured to face each other while the sliding surfaces α are in contact with the magnetized film (2).

In such a configuration, the main magnetic pole (1G is the recording medium α9
One auxiliary magnetic pole αQ is provided on both sides of the main magnetic pole α9, and one auxiliary magnetic pole αQ corresponding to each main magnetic pole α9 is also provided. Therefore, recording and reproduction can be performed simultaneously on both sides of the recording medium α9 in any combination.

Moreover, since recording and reproduction are performed while the recording medium αj slides on the sliding surface α which also protrudes by a distance p from the opposing surface aυ of the auxiliary magnetic pole (1(+), The gap between the surface 0110 and the surface 0110 is always maintained at a distance p.Distance p
The specific value for is 0<p≦0.2mm, but if this value is used, recording/erasing on the magnetized film α on the recording surface side during recording and erroneous playback during playback will occur. Efficient recording and playback can be performed without any problems.

Furthermore, since the main magnetic pole αυ is formed within the sliding body to maintain the gap between the recording medium α3 and the opposing surface α at the distance p, the main body of the perpendicular magnetic recording/reproducing head α9 can be made smaller, and the number of parts can be reduced. It has become easy to manufacture at low cost.

A second embodiment of the invention will be explained based on FIGS. 5 to 8. Portions that are the same as or correspond to those in the first embodiment are designated by the same reference numerals and explanations will be omitted.

In this embodiment, each corner (c) which is the end of the sliding surface αj is given a curvature, and furthermore, the traveling direction X of the recording medium αj is
The main magnetic pole αG and auxiliary magnetic pole αO arranged in front of the main magnetic pole αυ and auxiliary magnetic pole α0 arranged in the rear are shifted in the direction of each track (C) of the recording medium (to). .

With this configuration, the upper sliding surface α is the recording medium α.
Recording and reproduction are performed while J is sliding.

At this time, since the corner (A) of the sliding surface (to) has a curvature, the recording medium α3 is slid without being damaged. Furthermore, by shifting the arrangement of the main magnetic pole α9 and the auxiliary magnetic pole αQ at the front and rear in the traveling direction This eliminates mutual interference between the front and back sides, which would otherwise occur, and prevents erroneous recording and reproduction.

In addition, in implementation, the recording medium (11) may be either a tape or a disk.

Effects of the Invention Since the present invention is configured as described above, the air gap between the recording medium and the auxiliary magnetic pole is always maintained at a predetermined size, and recording and reproduction can be performed on the recording medium without the possibility of erroneous recording or erroneous reproduction. It is possible to miniaturize a perpendicular magnetic recording/reproducing head that can be simultaneously applied to both sides of the recording medium, and it can be manufactured easily at low cost.If the corners of the sliding surface are curved, it can slide without damaging the recording medium. Therefore, the life of the recording medium can be extended, and if the front and rear main magnetic poles and auxiliary magnetic poles are shifted in the track direction in the traveling direction of the recording medium, the front and back sides can be This has the effect of eliminating mutual interference with the recording medium and ensuring accurate recording and reproduction.

[Brief explanation of the drawing]

Fig. 1 is a front view showing one conventional example, Fig. 2 is a front view showing another conventional example, Fig. 3 is a front view showing another conventional example, and Fig. 4 is a front view showing another conventional example. 5 is a front view showing a second embodiment of the present invention; FIG. 6 is a plan view of one of two identical members constituting a perpendicular magnetic recording/reproducing head; FIG. The figure is a bottom view of the other side, and FIG. 8 is a plan view of the recording medium showing the position in contact with the main magnetic pole. 13... Recording medium, 14... Tip surface, 15... Main magnetic pole, 16... Auxiliary magnetic pole, 18... Opposing surface (recording medium opposing surface), 19... Sliding surface, 20 ...Sliding body, 2
4...Truck applicant Tokyo Electric Co., Ltd. Figure

Claims (1)

[Claims] 1. Main magnetic poles each having a tip end surface that contacts a recording medium are provided on both sides of the recording medium in front and back in the traveling direction of the recording medium, and the main magnetic pole is provided with the recording medium interposed in the main magnetic pole. auxiliary magnetic poles facing each other are provided, and sliding bodies are provided on both sides of the auxiliary magnetic poles, each of which is integral with each of the auxiliary magnetic poles and has a sliding surface that protrudes by a predetermined dimension beyond the recording medium facing surface of the auxiliary magnetic poles. A perpendicular magnetic recording/reproducing head characterized in that the main magnetic pole is formed in a sliding body so that the sliding surface and the tip surface are in the same plane. 2. A patent claim characterized in that the main magnetic pole and auxiliary magnetic pole located at the front in the traveling direction of the recording medium and the main magnetic pole and auxiliary magnetic pole located at the rear are respectively shifted for each track of the recording medium. The perpendicular magnetic recording/reproducing head according to item 1. 3. The perpendicular magnetic recording/reproducing head according to claim 1, wherein each part of the sliding body that contacts the recording medium has a curvature.