JPH08339503A - Magnetic head and its production - Google Patents

Abstract

PURPOSE: To execute recording and reproducing at a high density by setting the angle formed by the progressing direction of a recording medium of a preceding side core with the progressing direction of a magnetic head larger than the angle formed by the progressing direction of the magnetic head and the progressing direction of the recording medium. CONSTITUTION: A track width regulating surface 1, a track 2, a gap 3, a magnetic core 4 on a preceding side, a magnetic core 5 on a succeeding side, the progressing direction 6 of the magnetic head and a high BS material 7 forming a gap 3 are shown in the Fig. which is the tape sliding surface of the magnetic head of an MIG type. The angle α formed by the track width regulating surface 1 holding a track 2 with the progressing direction 6 of the head is set at α=0 (parallel) or is given $>0 (the angle more inclined to the side of the direction backward from the progressing direction of the recording medium than the parallel position). The recording medium 8 consists of the magnetic particles of an ME tape, etc., which have orientation oblique (perpendicular) to the thickness direction of the recording medium. The deterioration in the output of every track by the fluctuation in reproduction tracks is eliminated by the feasibility of forming all the tracks to desired widths. The execution of the recording and reproducing at a high density is thus possible.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic head used in a magnetic recording / reproducing apparatus such as a video tape recorder, and a method of manufacturing the magnetic head.

[0002]

PRIOR ART VIDEO TAPE RECORD
In a magnetic recording / reproducing apparatus that records / reproduces on / from a magnetic tape by a helical scan method using a rotating drum such as R (hereinafter referred to as “VTR”), in order to record more information with a limited tape amount, the adjacent The recording density is increased by performing guard bandless recording in which there is no blank area (hereinafter referred to as "guard band") between recording tracks.

In order to perform this guard bandless recording, a magnetic head having a track width wider than the track pitch is used, and the next new track is recorded so as to slightly overlap the adjacent track recorded immediately before. A bandless recording pattern is formed.

Here, when recording a new track,
The leakage magnetic field generated on the side surface of the gap of the magnetic head causes a phenomenon in which adjacent tracks that have already been recorded are overwritten (side write) more than necessary and erased (side erase). As a result, there arises a problem that the recording pattern of the adjacent track is unnecessarily narrowed and the reproduction output is lowered.

It is known that the side erase region generated by the above-mentioned leakage magnetic field depends on the shape of the head. Among them, what has been particularly regarded as a problem is to bond two magnetic cores to each other to form a magnetic head. It is a track shift that occurs when forming a magnetic gap and a track.

[0006] For example, IEICE Technical Report vol.91 No.284 (MR91-3
3: Kawaguchi, Tsuneki, Kubota), Metal In
In a combination of a Gap (hereinafter referred to as “MIG”) head and a metal film evaporated tape (Metal Evaporated tape) (hereinafter referred to as “ME tape”), the erasing amount (side erase) of the recording signal of the adjacent track is determined by the head. Depending on the track deviation amount and the shape of the track deviation end portion, the accuracy of the butt is increased to reduce the track deviation amount, and the shape of the track deviation end portion is formed into an obtuse angle (90 °).
It has been reported that the area to be erased can be reduced by the above.

[0007]

The recent improvement in the recording density of magnetic recording is largely due to the shortening of the wavelength of the recording signal, the narrowing of the track of the magnetic head, and the improvement of the performance of the recording medium.

Consider the influence of side erase in such a high density recording system. First, as the recording wavelength becomes shorter, the recording magnetization is not recorded to the deep layer of the recording medium, and shallow residual magnetization is formed. Erase) Further, in narrowing the track of the magnetic head, if the side-erased area width is the same as the conventional one, the ratio of the side-erased area width to the track pitch increases relatively, resulting in C / N and error rate. Will cause significant deterioration.

At present, with respect to the ME tape which is the highest density recordable medium, we have found the following interesting phenomenon. FIG. 16 shows the recording magnetization pattern of the ME tape by a magnetic force microscope (Magnetic Fo).
Rce Microscopy) (hereinafter referred to as “MFM”), and FIG. 17 is a conceptual diagram thereof. 16 and 17, regions magnetized by the leakage magnetic field of the magnetic head can be seen on both sides of the main signal recording portion, which are side write regions. The MF shown in FIG.
The M image shows the magnetization pattern when the recording is performed only once on an unrecorded ME tape which has not been recorded at all.
Observed at the relative speed of 1
0.2m / s, recording frequency 5.1MHz, recording wavelength 2μ
m, the coercive force Hc of the medium is 1500 Oe, and the magnetic head is a Sendust MIG head with an effective gap length of 0.21 μm. Further, in the magnetic head image shown in FIG. 16A, an image obtained by actually observing the magnetic head from the sliding surface is shown as a horizontal inversion (mirror image) in order to make the relative position with the magnetization pattern easy to understand. Hereinafter, in the present specification, a perspective view of the sliding surface from the bottom surface of the chip of the magnetic head (a mirror image of the sliding surface when viewed) is shown as the magnetic head sliding surface shape.

As in the guard bandless recording described above,
If the next track is recorded so that it overlaps the adjacent track that has already been recorded, this sidelight area will overwrite the adjacent track.
As a result, side erase occurs in which a part of the adjacent track is erased.

Further observation of this sidelight region in detail reveals that there is a bend different from the azimuth angle of the main signal recording portion. Comparing the shape of the sliding surface of the sidelight region and the magnetic head on which recording is performed, the shape of the leading side core of the magnetic head and the recording magnetization pattern match. This indicates that recording is determined by the leading core of the magnetic head in the ME tape.

It is generally known that the ME tape has an oblique orientation in the thickness direction of the tape as shown in FIG. 18, and the reproduction output greatly differs depending on the traveling direction of the magnetic head during recording. . The head movement direction shown in FIG. 18 indicates a case where recording is performed in the positive direction in which a large output can be obtained, and the experimental results shown in FIG. 16 are also recorded in the forward direction.

Next, FIG. 19 shows a magnetization pattern in the case of reverse recording. FIG. 20 is a conceptual diagram of FIG. FIG.
9 and 20, it is clear that the magnetization pattern in the reverse direction recording is exactly the same as that in the forward direction recording, and the magnetization pattern matches the shape of the trailing side core of the magnetic head.

These phenomena can be explained by the following recording mechanism. FIG. 21 is a conceptual diagram showing the magnetization mechanism in the case of recording in the positive direction on the ME tape. The orientation direction shown in the drawing is intentionally set in the thickness direction of the recording medium, and the magnetization of the magnetic particles is easy. The direction of the axis is shown. When a magnetic field is applied in this orientation direction, the recording medium is easily magnetized and easily recorded. On the contrary, when a magnetic field orthogonal to the orientation of the recording medium is applied, the recording medium is less likely to be magnetized. In consideration of these, FIG. 21 shows a magnetized region and a non-magnetized region. It can be seen that the magnetized region and the non-magnetized region in FIG. 21 substantially correspond to the magnetic field distribution from the leading side core 4 of the magnetic head and the direction of the magnetic field from the trailing side core 5 of the magnetic head.

That is, since the magnetic field distribution on the leading side of the magnetic head matches the orientation direction of the medium well, the medium is easily magnetized, and at this time, the magnetization remaining in the medium is almost determined.

Next, FIG. 22 shows the concept of the recording magnetization mechanism when the reverse recording is performed. In reverse recording, the magnetic field distribution on the trailing side of the magnetic head matches well with the orientation direction of the medium, and the residual magnetization is determined when the trailing side of the magnetic head passes.

Therefore, in a recording medium having a vertical orientation such as an ME tape, the recording magnetization is determined on the leading side of the magnetic head, and therefore the shape of the leading side core is very important for reducing sidelight. Is.

That is, of the track regulation surfaces that determine the track shape, the surface located on the side of the adjacent track that has been recorded by the leading core does not overlap the adjacent track, so that the adjacent track is side erased. It is possible to reduce the phenomenon.

However, in the conventional magnetic heads, what was done in order to reduce the side erasure was to focus only on the track deviation, and no consideration was given to the angle of the leading side track regulating surface. Absent.

Further, the shape of the track deviation end is obtuse (9
By setting it to 0 ° or more), the area to be erased can be made smaller. Technical Report No.284 (MR91-
33: Kawaguchi, Tsuneki, Kubota) cannot explain the result with the laminated head of FIG. 23, which is the simplest structure, let alone the example of the MIG head of FIG. 16 that we observed.

FIG. 24 is a conceptual diagram of FIG. If the interpretation of SIJ Vol.91 No.284 is correct, sidelights should be generated both above and below the recording track, but our experimental results clearly show that there is a large width in the track gap on the leading side. The sidelight area can be observed.

Further, in FIG. 23, in the sidelight region above the track, a bent magnetization different from azimuth is formed, and the bend matches the shape of the leading side core of the magnetic head. FIG. 25 illustrates the mechanism of generating such recording magnetization. In FIG. 25, sidelight is generated in the track shift portion of the leading (leading) core of the magnetic head, which has a large influence on the recording of the ME tape, and sidelight is generated in the track shift portion of the trailing (core) core. This is a representation that it is difficult to occur, and the result of this experiment (FIG. 23) can be explained well. In other words, the theory so far has not clarified the generation mechanism of side erase and is not an essential solution.

Further, normally, the magnetic head has a structure shown in FIG.
As shown in FIG. 5, the material is cut out from the ingot, grooved to form a track, and then two magnetic cores are welded. Further, when the head chip is cut out from the integrated block shown in FIG. 26, as shown in FIG. 27 or 28, the block is cut obliquely by an azimuth angle and the gap is provided with azimuth.

[0024]

Therefore, for example, V
When a pair of magnetic heads having positive and negative azimuth angles is used like TR, the angles of the respective track restricting surfaces are reversed as shown in FIG. 29, and the track restricting surfaces of one magnetic head are always adjacent to each other. There was a problem of getting onto the track and causing side erase.

Further, in the case of the MIG head as shown in FIG. 16, the track regulation surface of the gap portion has various angles depending on the film formation method. Even in this case, there is a problem that the adjacent tracks are side erased.

It is an object of the present invention to obtain a magnetic head and a method for manufacturing the same which can reduce side erasing that has occurred during recording.

[0027]

According to a first aspect of the present invention, there is provided a magnetic head in which a recording medium is advanced in a leading side core in a traveling direction of a magnetic head in a narrow track processing for restricting a track width of the magnetic head. The angle formed between the track width regulation surface located on the side and the traveling direction of the recording medium is larger than the angle formed between the traveling direction of the magnetic head and the traveling direction of the recording medium.

A magnetic head according to a second aspect of the present invention is a magnetic head of the MIG type in which a high saturation magnetic flux density material (hereinafter referred to as "high Bs material") is arranged in a gap portion, which precedes the magnetic head traveling direction. The angle between the track width regulation surface of the side core located on the recording medium advancing side and the advancing direction of the recording medium is larger than the angle between the magnetic head advancing direction and the advancing direction of the recording medium.

A magnetic head according to a third aspect of the present invention is a MIG type magnetic head in which a high Bs material is arranged in a gap portion, and a core on the leading side of the track restricting surface of the high Bs material portion in the traveling direction of the magnetic head. The angle between the track width regulation surface located on the recording medium advancing side and the advancing direction of the recording medium is larger than the angle between the magnetic head advancing direction and the advancing direction of the recording medium.

A magnetic head according to a fourth aspect of the present invention, wherein different azimuths are provided between two magnetic heads for recording tracks adjacent to each other, the track regulating surfaces of the respective magnetic heads are tilted in the same direction, and The angle formed by the track width regulation surface located on the recording medium traveling side of the leading core with respect to the head traveling direction and the traveling direction of the recording medium is
The shape is larger than the angle formed by the traveling direction of the magnetic head and the traveling direction of the recording medium.

A magnetic head according to a fifth aspect of the present invention is a magnetic head in which a pair of head chips having different azimuth angles are installed on one head base, and the track width regulating surfaces of the respective head chips are tilted in the same direction. The angle formed by the track width regulation surface located on the recording medium advancing side of the leading core with respect to the magnetic head advancing direction and the advancing direction of the recording medium is greater than the angle formed by the magnetic head advancing direction and the advancing direction of the recording medium. It is shaped.

According to a sixth aspect of the present invention, there is provided a method of manufacturing a magnetic head, wherein a track groove is formed by machining, and a track width regulating surface formed by the track groove extends in the magnetic head traveling direction and the recording medium traveling direction. The predetermined angle is larger than the angle formed.

According to a seventh aspect of the present invention, there is provided a method of manufacturing a magnetic head, wherein a track groove is formed by laser processing, and a track width restricting surface formed by the track groove extends in the magnetic head traveling direction and the recording medium traveling direction. The predetermined angle is larger than the angle formed.

[0034]

In the magnetic head of the present invention, the angle formed by the track width regulation surface of the leading side core located on the recording medium advancing side and the advancing direction of the recording medium is the advancing direction of the magnetic head and the advancing direction of the recording medium. Since it is larger than the angle formed, the recording magnetization determined by the leading core of the magnetic head is
In the shape of the magnetic head, the portion recorded by the leakage magnetic field on the track width regulation surface of the leading side core is strongly magnetized by the magnetic field of the gap passing immediately after, since it does not overlap with the adjacent track more than necessary. No curved sidelight magnetized areas remain at the track edges.

According to another aspect of the present invention, in the MIG type magnetic head in which a high Bs material is arranged in the gap portion to improve the recording ability, the track width regulating surface located on the recording medium advancing side of the leading side core and the recording medium are Since the angle formed by the advancing direction is larger than the angle formed by the advancing direction of the magnetic head and the advancing direction of the recording medium, side erasing of adjacent tracks is performed on the same principle as described above, and the azimuth gap of the gap is formed at the end of the recording track. It is possible to prevent the formation of curved magnetization patterns different from the corners.

In the magnetic head of the third aspect of the invention, the angle formed between the track width regulation surface of the high Bs material portion forming the gap of the leading side core and the traveling direction of the recording medium is the traveling direction of the magnetic head and the recording medium. Since it is larger than the angle formed by the advancing direction, side erasing of adjacent tracks and formation of a bent magnetization pattern different from the azimuth angle of the gap at the end of the self-recording track are prevented by the same principle as above. be able to.

According to another aspect of the magnetic head of the present invention, the angle formed by the track width regulation surface located on the recording medium advancing side of the leading side core of each magnetic head and the advancing direction of the recording medium is the advancing direction of the magnetic head and the recording medium. Since it is larger than the angle formed by the advancing direction, it is possible to side erase adjacent tracks and to prevent the formation of a curved magnetization pattern different from the azimuth angle of the gap at the end of its own recording track.

In the magnetic head of the fifth aspect of the invention, the angle formed between the track width regulation surface on the leading core side of each head chip and the traveling direction of the recording medium is the angle formed between the traveling direction of the magnetic head and the traveling direction of the recording medium. Since it is larger than the above, it is possible to side erase adjacent tracks and to prevent the formation of a bent magnetization pattern different from the azimuth angle of the gap at the end of the self recording track.

A method of manufacturing a magnetic head according to a sixth aspect of the invention is
When forming a track groove on the head piece by machining,
A head block obtained by joining a pair of head pieces to each other with an obliquely machined groove formed at a predetermined angle can be machined so that a track of a head chip obtained after azimuth cutting has a desired angle. .

A method of manufacturing a magnetic head according to a seventh aspect of the invention is
By irradiating the magnetic core with a laser to sublimate and evaporate a part of the magnetic core, the track of the head chip can be processed to have a desired angle.

[0041]

【Example】

Example 1. FIG. 1 is a view showing a tape sliding surface of a MIG type magnetic head according to a first embodiment of the present invention. 1 is a track width regulating surface, 2 is a track, 3 is a gap, 4 is a magnetic core on the leading side, 5 Is a magnetic core on the trailing side, 6 is a traveling direction of the magnetic head, and 7 is a high Bs material forming the gap 3. 2A and 2B are conceptual diagrams showing the relationship between the traveling direction of the magnetic head and the recording medium, 6 is the traveling direction of the magnetic head, 8 is the recording medium, and 9 is the traveling direction of the recording medium 8.

In the magnetic head constructed as shown in FIG.
The angle α formed by the track width restricting surfaces 1 sandwiching the track 2 with respect to the head traveling direction 6 is set to α = 0 (parallel), or α> 0 (with respect to the recording medium traveling direction rather than the parallel position). It has an angle inclined to the opposite side). The recording medium 8 used here is one in which magnetic particles such as ME tape have an oblique (vertical) orientation in the thickness direction of the recording medium.

FIG. 3 (a) is a diagram showing a magnetic head of the first embodiment, and FIG. 3 (b) is a diagram showing a recording magnetization pattern on the ME tape having this magnetic head shape.

FIG. 4 is a conceptual diagram of the magnetization pattern of FIG. The magnetization patterns shown in these figures are shown in FIGS.
A major difference from the conventional magnetic head shown in FIG. 5 is that magnetization (sidelight) different from the azimuth of the magnetic head can be observed only in the upper magnetization pattern in the figure. 4 shows the relationship between the head advancing direction 6 (angle β) viewed from the advancing direction 9 of the recording medium and the direction of the track width regulation surface (angle α + β). In this case, α + β ≧ β.

This can be explained as follows in the illustration of the recording mechanism shown in FIG. Since the recording medium 8 has an orientation in the thickness direction, it is magnetized by the leading side core 4 of the magnetic head. However, the lower track edge is overwritten by the magnetic field of gap 3 as it passes,
Magnetization remains at the edges of. On the other hand, the upper track edge is
Since the gap 3 is not overwritten, the leading core 4
The influence of the shape remains strong. That is, in the magnetization pattern recorded by the magnetic head having the shape as shown in FIG. 3, the upper part of the magnetic head is wider than the original track width and the lower part is magnetized to a desired position.

From the above, by overwriting the portion recorded on the upper part of the track of the magnetic head of FIG. 5 with the lower part of the track during the next recording, the magnetization pattern remaining on the recording medium 8 is the desired track. Formed in pitch.

In the first embodiment, only the portion of the track width regulating surface 1 formed of the high Bs material 7 is parallel to the head advancing direction, or the advancing direction of the recording medium 8 is more than the parallel position. The same effect can be obtained by forming it at an angle inclined in the opposite direction. Two examples of this are shown in FIGS. 6 and 7, respectively.

In the first embodiment, the MIG type head having a complicated structure has been described as an example. However, the present invention can be applied to a case of being composed of a single material using a bulk material such as a single crystal ferrite, or a laminated head. , The same effect can be obtained.

Example 2. FIG. 8 is a diagram showing a tape sliding surface of a magnetic head according to a second embodiment of the present invention. The same reference numerals as those in FIG. 1 denote the same or corresponding portions. 2 shows two magnetic heads used in a magnetic recording / reproducing apparatus for performing azimuth recording by providing different azimuth angles between two magnetic heads for recording tracks adjacent to each other.

The track width restricting surfaces 1 of the two magnetic heads shown in FIG. 8 are inclined in the same direction, and the track width restricting surfaces located on the recording medium advancing side of the leading core 4 with respect to the advancing direction of the magnetic heads. The angle formed by 1 and the traveling direction of the recording medium 8 is larger than the angle formed by the traveling direction of the magnetic head and the traveling direction of the recording medium 8.

The recording magnetization pattern when the magnetic head shown in FIG. 8 is used is the same as that shown in FIG. 3A because of its shape, and is therefore the same as that shown in FIG. 3B. FIG. 9 shows the concept of the magnetization pattern when recording is performed alternately by the two magnetic heads shown in FIG. As shown in FIG. 9, the bent magnetization generated in the upper portion of the track is completely erased by the magnetization to be overwritten next, and the bent side write magnetization region does not remain at the end of the track. A pattern is formed.

On the other hand, when the conventional magnetic head shown in FIG. 16 is used, a recording magnetization pattern as shown in FIG. 10 is formed, a part of which is side-written, and the effective track width is It becomes narrower than the desired track width.

The magnetic head of the second embodiment is applied to a multi-channel recording system in which a plurality of heads are installed on one base such as a VHS system VTR or a plurality of heads simultaneously record. However, it goes without saying that the same effect can be obtained.

Example 3. 11 and 12 are views showing a third embodiment of the present invention, which shows a method of manufacturing the magnetic head shown in the first embodiment.

In the third embodiment, first, the material is cut out from the core material as shown in FIG.
The outer shape is ground. Next, in the grooving step of FIG. 11C, the groove is formed obliquely so as to have an angle larger than the azimuth cutting angle of FIG. 11 which is a later step. Then, as shown in FIG. 11 (4), the fused glass is molded, the surface to be the magnetic gap is mirror-polished, and the gap material (S
After forming a film of iO ₂ , glass, metal or the like), a pair of ferrite pieces are welded to form an integral block.
Next, as shown in FIG. 12, the block is cut by azimuth,
Get multiple head chips. That is, a desired track width regulating groove can be formed by merely making the angle formed by the track groove and the perpendicular to the gap direction larger than the azimuth cutting angle (angle formed by the perpendicular to the gap surface direction and the azimuth cutting surface).

Example 4. 13 to 15 are views showing a fourth embodiment of the present invention and show a method of forming a track groove by laser processing. First, FIG.
Cut the material from the core material according to (1), and
The ferrite piece shown in (2) is obtained. Then, the outer shape is ground in the same manner as in FIG. 11 (2), and the ferrite material having the gap surface polished is subjected to a gap material (SiO ₂₎ by using a thin film forming technique such as vapor deposition or sputtering as shown in FIG. 13 (3). Or glass or metal), and then a pair of ferrite pieces are welded to form an integral block as shown in FIG. 13 (4). In the case of the MIG head, the saturation magnetic flux density Bs such as sendust or Fe-Ta-N is 1.0 before the step of FIG.
A magnetic material of T (tesla) or more is deposited. Next in FIG.
According to 3 (5), the head chip is azimuthally cut from the integrated head block. In addition, FIG.
(6) is a conceptual diagram when a head chip is installed in a head base.

FIG. 14 is a schematic view showing a laser processing process.
Track groove processing is performed on the head chip of FIG.
In the apparatus shown in FIG. 14, a mask having a predetermined pattern is positioned between the laser source and the head to be processed, and the laser light passing through the mask is imaged on the magnetic head using a lens to form a processed shape image. Are transferred to a magnetic head for batch processing.

For example, when ferrite is used as the core material, the laser source is XeCl (λ = 308n).
m), KrF (λ = 248 nm), ArF (λ = 193)
An excimer laser having a photon energy of several ev, such as (nm), is preferable because it absorbs ferrite well. Also, Y
The same processing can be performed by using an AG laser (λ = 1064 nm) with a short pulse and high output using a Q switch.

FIG. 15 shows an example of a mask used in the processing apparatus shown in FIG. 14, which is usually a metal material having a high reflectance such as stainless steel,
A dielectric mask in which chromium is deposited on a quartz substrate is used. In the mask of FIG. 15, since the angle of the track width regulation surface is inclined, by processing a large number of magnetic heads using this mask, the track grooves of all the magnetic heads have the same shape, and the track width The angle of the regulation surface can be the same. In the conventional magnetic head manufacturing method, as shown in FIG. 29, the track angle is different depending on the direction of the azimuth of the gap of the magnetic head. As shown, it is possible to obtain a magnetic head whose tracks are inclined in the same direction.

[0060]

Since the present invention is constructed as described above, it has the following effects.

According to the first aspect of the invention, the angle formed by the track width regulation surface located on the recording medium advancing side of the leading core with respect to the magnetic head advancing direction and the advancing direction of the recording medium is the magnetic head advancing direction. By making the angle larger than the angle formed by the advancing direction of the recording medium, the adjacent recorded tracks are not side erased. Therefore, all recording tracks can have a desired width, so that there is no output deterioration for each track due to variations in the reproduction track width, and recording / reproduction can be performed in high density recording.

According to the second aspect of the present invention, also in the MIG type magnetic head in which the high Bs material is arranged in the gap portion to improve the recording ability, the same shape as described above is applied to the head traveling direction. Since the side erase area generated at the lower end of the recording track can be eliminated from the magnetization pattern of the tape, recording and reproduction can be performed with higher density by using the high coercive force medium.

According to the third aspect of the invention, in the MIG type magnetic head in which the high Bs material is arranged in the gap portion to enhance the recording ability, the shape of the track width restricting surface only in the high Bs material portion is as described above. With the same shape, the side erase area generated at the lower end of the recording track with respect to the head traveling direction can be eliminated on the magnetic pattern of the tape.

According to the invention of claim 4, a magnetic head used in a magnetic recording / reproducing apparatus for performing azimuth recording by providing a relative azimuth angle between two magnetic heads for recording tracks adjacent to each other, Inclining the track width regulation surface of each magnetic head in the same direction,
Since the angle formed by the direction of travel of the recording medium and the track width regulation surface located on the side of the advance of the recording medium of the leading core is larger than the angle formed by the direction of travel of the magnetic head and the direction of travel of the recording medium, The side erase area generated at the lower end of the recording track can be eliminated on the magnetic pattern of the tape, and the edge of the recording track can be formed neatly.

According to the fifth aspect of the invention, in a magnetic head in which two or more head chips having different azimuth angles are installed on one head base, the head core of each head chip is positioned on the recording medium advancing side. Since the track width regulating surface is inclined in the same direction and the angle formed by the track width regulating surface and the traveling direction of the recording medium is larger than the angle formed by the recording medium traveling direction and the head traveling direction, a plurality of heads are Even in a multi-channel recording apparatus using the same, the side erase area can be eliminated on the magnetic pattern of the tape, and moreover the edge of the recording track can be formed neatly.

According to the sixth aspect of the present invention, as a method of manufacturing a magnetic head, in the formation of the track width regulating surface, mechanical processing is used to form a diagonally machined groove in the head piece, and a pair of head pieces are joined to obtain a magnetic head. Since the head block is processed by azimuth cutting so that the track width regulating groove forms a predetermined angle, the magnetic head can be easily manufactured.

According to the invention of claim 7, as the magnetic head manufacturing method, since the laser processing is used to form the track width regulating surface, the shape of the track width regulating groove can be processed more easily.

[Brief description of drawings]

FIG. 1 is a front view showing a tape sliding surface of a magnetic head according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a relationship between a traveling direction of a magnetic head and a traveling direction of a recording medium.

3 is a diagram showing a recording magnetization pattern on the ME tape of Example 1. FIG.

FIG. 4 is a conceptual diagram of FIG.

FIG. 5 is an explanatory diagram of a recording mechanism according to the first embodiment.

FIG. 6 is a diagram showing another configuration example of the first embodiment.

FIG. 7 is a diagram showing still another configuration example of the first embodiment.

FIG. 8 is a front view showing a tape sliding surface of a magnetic head according to a second embodiment of the present invention.

9 is a diagram showing a recording magnetization pattern on the ME tape of Example 2. FIG.

FIG. 10 is a conceptual diagram of a recording magnetization pattern of a conventional azimuth recording magnetic head.

FIG. 11 is a diagram for explaining a manufacturing process of the magnetic head according to the third embodiment of the present invention.

FIG. 12 is a diagram for explaining a manufacturing process of the magnetic head according to the third embodiment of the invention.

FIG. 13 is a diagram illustrating a manufacturing process of the magnetic head according to the fourth embodiment of the invention.

FIG. 14 is a diagram showing a laser processing apparatus used in a fourth embodiment.

FIG. 15 is a diagram showing an example of a mask used in Example 4;

FIG. 16 is a diagram showing a magnetization pattern of a conventional magnetic head.

FIG. 17 is a conceptual diagram of FIG. 16.

FIG. 18 is a diagram showing the orientation of the ME tape.

FIG. 19 is a diagram showing a magnetization pattern when reverse recording is performed on an ME tape with a conventional magnetic head.

20 is a conceptual diagram of FIG. 19. FIG.

FIG. 21 is a diagram showing a magnetization pattern when recording in a forward direction on an ME tape.

FIG. 22 is a diagram showing a magnetization pattern when reverse recording is performed on the ME tape.

FIG. 23 is a diagram showing a magnetization pattern when recording is performed on an ME tape with a stacking head.

FIG. 24 is a conceptual diagram of FIG. 23.

FIG. 25 is an explanatory diagram of a magnetization mechanism by a stacking head.

FIG. 26 is an explanatory diagram of the manufacturing process of the conventional magnetic head.

FIG. 27 is an explanatory diagram of the manufacturing process of the conventional magnetic head.

FIG. 28 is an explanatory diagram of the manufacturing process of the conventional magnetic head.

FIG. 29 is a front view showing a tape sliding surface of a conventional azimuth recording magnetic head.

[Explanation of symbols]

1 track width regulation surface, 2 tracks, 3 gaps,
4 leading side core, 5 trailing side core, 6 magnetic head traveling direction, 7 high Bs material, 8 recording medium, 9 recording medium traveling direction.

Front Page Continuation (72) Inventor Yoichi Masubuchi, No. 1 Baba Institute, Nagaokakyo City Video System Development Laboratory, Mitsubishi Electric Corporation

Claims (7)

[Claims] 1. A magnetic head for use in a magnetic recording / reproducing apparatus for recording / reproducing information on / from a recording medium in which magnetic particles have an oblique (vertical) orientation, wherein the recording medium traveling side of the leading side core with respect to the traveling direction of the magnetic head. A magnetic head, characterized in that an angle formed by a track width regulation surface and a traveling direction of a recording medium is larger than an angle formed by a traveling direction of the magnetic head and a traveling direction of the recording medium. 2. A high saturation magnetic flux density material (high B
The magnetic head according to claim 1, wherein the magnetic head is a metal in gap (MIG) type in which an S material is arranged. 3. A MIG type head having a high Bs material disposed in a gap portion, wherein the track width regulation surface of the high Bs material portion located on the recording medium advancing side of the leading core in the magnetic head advancing direction and the recording medium. A magnetic head, wherein an angle formed by a traveling direction is formed to be larger than an angle formed by a traveling direction of the magnetic head and a traveling direction of a recording medium. 4. A magnetic head in which two magnetic heads for recording tracks adjacent to each other are provided with different azimuth angles, and the track width regulating surfaces located on the recording medium advancing side of the leading side core of each magnetic head are the same. The magnetic head is inclined in the direction, and the angle formed by the track width regulation surface and the recording medium traveling direction is larger than the angle formed by the recording medium traveling direction and the head traveling direction. . 5. A magnetic head in which two or more head chips having different azimuth angles are installed on one head base, and the track width regulating surface is located on the recording medium advancing side of the leading side core of each head chip. Are inclined in the same direction, and the angle formed by the track width regulating surface and the moving direction of the recording medium is larger than the angle formed by the recording medium moving direction and the head moving direction. Magnetic head. 6. A track groove is formed by machining, and a track width regulating surface formed by the track groove is at a predetermined angle larger than an angle formed by a magnetic head traveling direction and a recording medium traveling direction. The method for manufacturing a magnetic head according to claim 1, wherein the magnetic head is manufactured. 7. A track groove is formed by laser processing, and a track width regulating surface formed by the track groove has a predetermined angle larger than an angle formed by a magnetic head moving direction and a recording medium moving direction. The method for manufacturing a magnetic head according to claim 1, wherein the magnetic head is manufactured.