JPH07134802A - Manufacture of magnetic recording reproduction device and magnetic head - Google Patents

Abstract

PURPOSE:To reduce side erasure by arranging the displacement end part of a track located on the trailing side of a magnetic head in the displacement end part of the track of a magnetic head so as to over lap the leading track. CONSTITUTION:The displacement end part 3 of the trailing-side track of a a magnetic head 1 in which the displacement of a track is brought about is arranged on the preceding record track 6 side. Thereby, the side write which remains on a metal deposition tape is brough about in the displacement end part 2 of a leading-side track and not produced in the trailing-side displacement end part 3. Therefore, an adjacent track in which a signal has already been recorded is not erased. Also, the side write area which is produced on the reading side is substituted by a record signal at the time of the next head scanning to be adequately erased, so that any problem is not brought about.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of using a magnetic head used in a magnetic recording / reproducing apparatus,
In particular, even with a magnetic head having a track shift, the problem of side erase and side write of an already recorded adjacent track can be solved.

[0002]

2. Description of the Related Art FIG. 8 shows, for example, "home video technology".
It is a figure which shows the example of manufacture of the ferrite head shown by (Japan Broadcasting Corporation edit, Katsuya Yokoyama), (a) is material removal,
(B) outline grinding, (c) grooving, (d) glass mold, gap surface polishing, (e) adhesion, gap formation,
(F) is cutting, (g) is side polishing, (h) is base adhesion, (i) is tape running surface polishing, and (j) is winding. FIG. 9 is a schematic diagram of a track shift that occurs during adhesion / gap formation. In the figure, 11 is a magnetic gap, 13 is a track width, 17 is a fused glass, 18 is a ferrite, and 19 is a track shift.

Usually, a ring type magnetic head used for a VTR (VIDEO TAPE RECORDER) or an ATR (AUDIO TAPE RECORDER) is a ring type magnetic head using a bulk material such as ferrite or MI.
Most of the G (Metal In Gap) heads, laminated heads, and the like form a magnetic gap and a recording track by abutting two pieces as described above. Usually, this work uses a welding jig to adjust the positional relationship between the two pieces while monitoring with a microscope in order to reduce the track deviation as much as possible.
It is kept below m.

The reason for making the track deviation as small as possible is that if the deviation amount is large, problems such as side erase and side write to the adjacent track due to the track deviation end will occur during recording. The side erase is a phenomenon that a part of the already recorded track is erased by a leakage magnetic field at the track end portion of the recording head as shown in FIG. In the figure, 1 is a magnetic head, 4 is a head traveling direction, 5 is an azimuth, 6 is a preceding recording track (a track on which a signal has already been recorded on the leading side in the tape traveling direction), and 8 is a side erased portion. In the conventional magnetic recording / reproducing apparatus, the track deviation amount of the magnetic head is suppressed to 2 to 3 μm or less by the above-described magnetic head manufacturing method. Therefore, for example, in the VHS method having a wide track pitch of 58 μm, the track deviation is recorded. The C / N deterioration caused by reproduction is small, and even if the magnetic head is vaguely used, the image quality is not greatly affected.

[Technical Report] Vol.91 No.284 (MR91-33:
Kawaguchi, Tsuneki, Kubota), MIG head and ME
According to the study of side erase by the combination of tapes,
The erased amount of the recording signal of the adjacent track due to the side erase depends on the track deviation amount of the head and the shape of the track deviation end portion. The obtuse angle (90 ° or more) can reduce the erased area.

[0006]

In the conventional magnetic recording / reproducing apparatus as described above, a ring type magnetic head which abuts two pieces to form a magnetic gap is used. However, in a head actually formed by this method, However, track deviation is an unavoidable drawback in manufacturing.

Since the track deviation depends on the track width processing accuracy of the magnetic head and the track abutment technique, the deviation amount is almost constant regardless of the track width. The problem of erasing becomes serious. That is, the higher the recording density of the system, the more remarkable the deterioration of C / N and error rate, which is a fatal problem for magnetic recording.

In addition, the above-mentioned Technical Bulletin Vol.91 No.284 describes from the viewpoint of what kind of magnetic head should be designed in order to reduce the erasure of the recording signal of the adjacent track due to side erase. Although a proposal has been made, no solution is mentioned from the viewpoint of how to use the magnetic head in which the track deviation has already occurred in the magnetic recording / reproducing apparatus to reduce the erase amount by the side erase. Not not.

The present invention has been made to solve the above-mentioned problems, and alleviates the problem of side-erasing adjacent recorded tracks at the time of recording, which occurs when a magnetic head having a track shift is used. It is an object of the present invention to provide a magnetic recording / reproducing apparatus and a method of manufacturing a magnetic head.

[0010]

In a magnetic recording / reproducing apparatus according to claim 1 of the present invention, a recording medium such as an ME tape,
Use a medium in which the magnetic particles of the medium have an oblique (vertical) orientation, the track offset end of the magnetic head is located on the preceding recording track side of the recording track pattern on the tape, and the track offset end is magnetic. It is installed so as to be positioned on the trailing side with respect to the head traveling direction.

Further, in the magnetic recording / reproducing apparatus according to the second aspect, the track width processing dimension of one piece is obviously wider than the track width processing dimension of the other piece, and the track shift end portion caused by the butting is wide. When using the magnetic head formed only on the side piece, the wide side piece is installed on the trailing side with respect to the head traveling direction.

In the magnetic recording / reproducing apparatus according to the third aspect, only one piece has a high saturation magnetic flux density (hereinafter referred to as high Bs).
In the case of using a MIG type magnetic head in which the material is arranged, the piece side in which the high Bs material is arranged is set to the leading side with respect to the head traveling direction, and the track shift end of the trailing side piece is recorded on the tape. It is installed on the side of the preceding recording track.

According to another aspect of the magnetic recording / reproducing apparatus of the present invention, in the magnetic recording / reproducing apparatus for performing azimuth recording on a recording medium such as a ME tape in which magnetic particles of the medium have an oblique (vertical) orientation, adjacent tracks are recorded. At least a pair of magnetic heads having a relatively azimuth angle is used between two magnetic heads for recording, and the shape of the track shift end of each magnetic head is different depending on the azimuth angle. Is used.

According to a fifth aspect of the magnetic recording / reproducing apparatus, when the direction of the projection vector of the magnetic head traveling direction vector in the tape length direction coincides with the tape traveling direction, the azimuth angle of the magnetic head and Regarding the relationship between the track deviation ends, in the L azimuth head, the shape of the magnetic core material at the track deviation end is an acute angle (90 ° or less), and the shape of the track deviation end of the R azimuth head is an obtuse angle (90 ° or more). It uses a pair of magnetic heads.

According to a sixth aspect of the present invention, there is provided a magnetic head used in a magnetic recording / reproducing apparatus for recording a signal on a recording medium such as an ME tape in which magnetic particles of the medium have an oblique (vertical) orientation. The magnetic head is a ring-type magnetic head that abuts two pieces to form a magnetic gap, and intentionally shifts the positions of the two pieces during the operation of abutting and welding the two pieces during head manufacturing. By doing so, the track shifts of all the heads (pieces) cut out from the pieces are generated in the same direction.

[0016]

In the magnetic recording / reproducing apparatus according to the first aspect of the present invention, when a tape having an oblique orientation such as an ME tape is used as the recording medium, the side erase is performed on the leading side of the magnetic head (preceding the head running direction). It occurs largely at the track end of the side gap edge) and hardly occurs at the trailing (trailing edge) side, so
By arranging the head so that the trailing end of the track overlaps the adjacent track on which a signal has already been recorded, erasing due to side erase can be reduced.

Further, in the magnetic recording / reproducing apparatus according to the second aspect of the present invention, the track width processing dimension of one piece is obviously wider than the track width processing dimension of the other piece, and the track shift end portion caused by the butting. However, when using a magnetic head formed only on the wide side piece, the wide side piece is installed on the trailing side with respect to the head traveling direction, so recording signal erasure of adjacent tracks due to side erase is reduced. can do.

Further, in the magnetic recording / reproducing apparatus according to the third aspect of the present invention, when the MIG type magnetic head in which the high Bs material is arranged only on one piece is used, the piece side on which the high Bs material is arranged is placed. Set to the leading side with respect to the head traveling direction,
Since the track offset end of the trailing side piece is installed on the side of the preceding recording track of the recording track pattern on the tape, it is possible to reduce the erasure of the recording signal of the adjacent track due to side erase.

Further, in the magnetic recording / reproducing apparatus according to claim 4 of the present invention, in the magnetic recording / reproducing apparatus for performing azimuth recording on a recording medium in which magnetic particles of the medium have oblique (perpendicular) orientation such as ME tape, they are adjacent to each other. An azimuth angle is relatively provided between the two magnetic heads for recording the track. According to the azimuth angle, the shape of the track deviation end of each magnetic head is formed to be different, so that the track deviation end overlapping the preceding recording track is formed on the trailing side in the head traveling direction for both azimuth heads. Therefore, it is possible to reduce the erasure of the recording signal of the adjacent track due to the side erase.

Further, in the magnetic recording / reproducing apparatus according to claim 5 of the present invention, when the direction of the projection vector of the magnetic head traveling direction vector in the tape length direction coincides with the tape traveling direction, The relationship between the azimuth angle and the track shift end is L. In the azimuth head, the shape of the magnetic core material at the track shift end is an acute angle (90 ° or less), and R
The shape of the track deviation end of the azimuth head is obtuse (90
Since the track deviation end overlapping with the preceding recording track can be installed on the trailing side with respect to the head advancing direction in both heads, the erasure of the recording signal of the adjacent track due to side erase can be reduced. it can.

Further, in the method of manufacturing a magnetic head according to claim 6 of the present invention, when the ring type magnetic head is manufactured,
When the two pieces are abutted against each other and welded to form a gap, the positions of the two pieces are intentionally shifted in one direction, whereby the direction of the track shift can be defined in advance.

[0022]

EXAMPLES In the magnetic recording / reproducing apparatus configured as described above, a medium having magnetic particles having an oblique (vertical) orientation such as an ME tape is used as a recording medium. In the case of the type medium, recording was determined at the trailing side (trailing side) edge of the magnetic head.
In the case of a recording medium in which magnetic particles of the medium have a vertical orientation such as a tape, the recording magnetization is determined by the magnetic field from the leading (leading side) edge with respect to the traveling direction of the magnetic head. The recording magnetization mechanism is completely different from the conventional one.

FIGS. 11 and 12 show magnetization patterns when signals are recorded on only one track on two types of media having different orientations of magnetic particles, ME tape (oblique orientation) and thin MP tape (longitudinal orientation). It was done. 23 in the figure
Is a recording magnetization pattern, 24 is a sidelight by the trailing side track end, 25 is a sidelight by the leading side track end, 26 is an ME tape, and 27 is a thin layer MP tape. For recording, a laminated magnetic head (FIG. 10) with a track shift intentionally added was used. In FIG. 10, 2 is a track shift end on the leading side, 3 is a track shift end on the trailing side, 4 is a head traveling direction, 11 is a magnetic gap, 13 is a track width, 20 is glass, 21 is a ceramic substrate, 22 is sendust. Note that the recording condition is the relative speed of the head tape 1
It is a rectangular wave (recording wavelength 2 μm) with 0.2 m / s and recording frequency 5.1 MHz. In FIGS. 11 and 12, both the ME tape and the thin layer MP tape show a magnetization pattern spread in the track width direction due to the sidelight phenomenon.
In the case of tape, side-lit areas with almost the same width are generated on both sides of the track, whereas in the case of ME tape, sidelight 25 is largely generated due to the track deviation end on the leading side, and the tray is The sidelights 24 due to the ring side track deviation end portions are substantially different from each other in that they are hardly generated. This result demonstrates that the magnetization mechanism of the ME tape described above is determined by the leading edge.

Further, as is apparent from FIG. 10, the shape of the track shift end of the used head is an obtuse angle. Nevertheless, since the large sidelight area is observed, the dependence of the sidelight on the track end shape reported in IEICE Vol.91 No.284 does not have a great effect.

Example 1. 1 is a conceptual diagram showing a magnetic recording / reproducing apparatus according to an embodiment of claim 1 of the present invention. In the figure, 1 is a magnetic head, 2 is a leading side track shift end, 3 is a trailing side track shift end, 4 is a head advancing direction, 5 is azimuth, 6 is a preceding recording track, and 7 is a tape advancing direction. .

In the magnetic recording / reproducing apparatus configured as described above, the magnetic head 1 is a head having a track deviation, and the trailing side track deviation end portion 3 is provided on the preceding recording track 6 side. The recording medium used here has an oblique (vertical) orientation such as an ME tape.

According to this method, the side light remaining on the ME tape occurs at the leading side track shift end portion 2 and does not occur at the trailing side end portion 3. Therefore, an adjacent track on which a signal has already been recorded will not be erased. Further, the sidelight area generated on the leading side is not a problem because the recording signal is overwritten by the next head scan and is sufficiently erased. It goes without saying that this method of use can be applied to any type of magnetic head such as MIG type, laminated type, bulk type and multi-channel type for simultaneously recording multi-channel signals.

Example 2. FIG. 2 is a conceptual diagram showing a magnetic recording / reproducing apparatus according to an embodiment of claim 2 of the present invention. In the figure, 1 is a magnetic head, 4 is a head traveling direction, 5 is an azimuth, 6 is a preceding recording track, 7 is a tape traveling direction,
Reference numeral 9 is a track shift end portion.

In this embodiment, the track width processing dimension of one piece is obviously wider than the track width processing dimension of the other piece, and the track offset end portion caused by the butting is formed only on the wide side piece. It is a method of using a head. In this example, the wide side piece is installed on the trailing side with respect to the head traveling direction to suppress the occurrence of side erase.

FIG. 3 shows a possible modification of this embodiment. This head is an example of a method of use in which the track width of one piece is obviously wide and a track shift occurs only on one edge at the time of butting.

In FIG. 3, there are four possible ways of use depending on the head advancing direction and the position of the track shift end.
(1) cannot be used because the track shift end portion 9 is on the leading side and overlaps the preceding recording track 6 so that the preceding recording track is erased. On the other hand, (2)-
In the case of (4), the magnetic recording / reproducing apparatus can be used. In (2), the track shift end portion 9 overlaps the preceding track 6, but since it is on the trailing side, side erase does not occur. (3) is the most ideal use example among these, in which the track shift end portion 9 does not overlap the preceding recording track 6 and is located on the trailing side, so there is no influence of side erase. In (4), since the track shift end portion 9 is on the leading side, a side-written area 8 is generated, but this is sufficiently erased because the recording signal is overwritten in the next head scan, and there is no problem.

Example 3. FIG. 4 is a conceptual diagram showing a magnetic recording / reproducing apparatus according to an embodiment of claim 3 of the present invention. In the figure, 1 is a magnetic head, which has a high Bs on only one side of the gap.
MIG type with material, 4 is the head traveling direction,
Reference numeral 5 is azimuth, 6 is a preceding recording track, 9 is a track shift end portion, and 10 is a high Bs material.

In FIG. 4, four use methods (1) to (4) can be considered at the position of the high Bs material 10 and the position of the track shift end portion 9, but the recording magnetic field of the track shift end portion 9 is used. When the end of the weak ferrite is located on the trailing side and overlaps with the preceding recording track 6, the side erase exerted on the adjacent track is the smallest. Figure 4 (4)
Corresponds to this. In (1) and (2) of FIG. 4, since the leading side track shift end portion overlaps with the preceding recording track 6, the side erase effect is likely to occur. In particular,
In (1), since the high Bs material having a strong recording magnetic field is located on the leading side, it is the worst use method. (3) is the case where the track deviation end 9 is located on the preceding recording track 6 on the trailing side. However, since the high Bs material exists at the track deviation end, the side erase magnetic field strength is (4 It is stronger than (4) and is inferior to (4).

Example 4. FIG. 5 is a conceptual diagram showing a magnetic recording / reproducing apparatus according to the fourth and fifth embodiments of the present invention. In the figure, 2 is a leading side track shift end portion, 3 is a trailing side track shift end portion, 4 is a head traveling direction, 7 is a tape traveling direction, 11 is a magnetic gap, 12 is an R azimuth head, 13 is a track width, Reference numeral 14 is an L azimuth head, 15 is a track deviation edge shape angle, 16 is a track angle θ, and 0 ≦ θ <90 °.

In the pair of magnetic heads used in the magnetic recording / reproducing apparatus configured as described above, the track deviation end shape angle 15 of the R azimuth head 12 is made obtuse and the track deviation end shape angle 15 of the L azimuth head 13 is set. Since the magnetic head has an acute angle, as shown in the figure, both magnetic heads can have the track shift end on the tape traveling direction 7 side (preceding recording track side) on the trailing side with respect to the head traveling direction. Since the recording medium is one in which magnetic particles have an oblique (vertical) orientation such as an ME tape, the side erase generated on the trailing side of the magnetic head is small, and there is no fear of erasing the preceding recording track.

In this embodiment, the R azimuth head 1
2. There is no problem even if the absolute values of the azimuth angles of the L azimuth head 14 are different. The form of the magnetic head may be any of a laminated type, a MIG type, a bulk type and the like. Also,
It goes without saying that it can also be applied to a multi-channel type head that simultaneously records multi-channel signals.

Example 5. FIG. 6 is a conceptual diagram showing a method of manufacturing a magnetic head according to an embodiment of claim 6 of the present invention.
In the figure, 11 is a magnetic gap, 13 is a track width, 17 is fused glass, 18 is a ferrite piece, and 19 is a ferrite piece.
Is a track shift.

FIG. 6 shows an improvement in the step (5) of welding and gap formation in the manufacturing example of the conventional ferrite head shown in FIG. 8, in which the track deviation caused in the step of butting is generated in one direction. It is a thing. In the conventional method of this step (FIG. 9), first, the tracks are aligned in the center of the two pieces, and the tracks are attempted to be aligned in the entire pieces. Therefore, a head having various track deviations is formed in the entire pieces. In this embodiment, since the entire piece is intentionally shifted in one direction, a magnetic head whose method of use is clear can be easily created. Processes other than this step follow the procedure of FIG. It should be noted that this method has been exemplified for the bulk type ferrite head, but it goes without saying that it can also be applied to a laminated type head or a MIG head.

[0039]

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

According to the first aspect of the present invention, the track offset end portion of the magnetic head generated during the piece butting is set on the preceding recording side of the recording track pattern on the tape, and the track offset end portion is magnetic. Since it was installed in the magnetic recording / reproducing device so as to be positioned on the trailing side with respect to the head traveling direction,
By using a medium having an oblique orientation such as an ME tape as the recording medium, it is possible to reduce the problem of side erase that occurs in the already recorded tracks.

Further, according to claim 2 of the present invention, the track width machining dimension of one piece is obviously wider than the track width machining dimension of the other piece, and the track deviation end portion caused by the butting is only the wide side piece. When the magnetic head formed in the above is used, the problem of side erase can be reduced by installing the wide side piece on the trailing side with respect to the head traveling direction.

Further, according to the third aspect of the present invention, when the MIG type head in which the high Bs material is arranged only in one piece is used, the piece side in which the high Bs material is arranged is set to the leading side with respect to the head traveling direction, By arranging the track offset end of the trailing side piece on the side of the preceding recording track of the recording track pattern on the tape, the problem of side erase can be reduced.

According to a fourth aspect of the present invention, by changing the shape of the track shift end according to the azimuth angle,
In both the pair of azimuth heads, the track shift end located on the side of the preceding recording track can be located on the trailing side with respect to the head traveling direction, so that the problem of side erase can be reduced.

Further, in claim 5 of the present invention, since the magnetic head which could not be used conventionally due to the track deviation defect can be used in the magnetic recording / reproducing apparatus, the productivity of head manufacturing can be indirectly improved. You can

According to the sixth aspect of the present invention, when the ring-type magnetic head in which two pieces are butted against each other to form a magnetic gap, the pieces are butted and welded to form a gap, a track is intentionally unidirectionally tracked. By causing the deviation, the direction of the track deviation can be defined in advance, so that the magnetic head whose method of use is clear can be easily manufactured.

[Brief description of drawings]

FIG. 1 is a conceptual diagram showing a magnetic recording / reproducing apparatus according to an embodiment of claim 1 of the present invention.

FIG. 2 is a conceptual diagram showing a magnetic recording / reproducing apparatus according to an embodiment of claim 2 of the present invention.

FIG. 3 is a diagram showing a modified example of FIG.

FIG. 4 is a conceptual diagram showing a magnetic recording / reproducing apparatus according to an embodiment of claim 3 of the present invention.

FIG. 5 is a conceptual diagram showing a magnetic recording / reproducing apparatus according to an embodiment of claims 4 and 5 of the present invention.

FIG. 6 is a conceptual diagram showing a method of manufacturing a magnetic head according to an embodiment of claim 6 of the present invention.

FIG. 7 is a diagram showing an outline of a conventional side erase.

FIG. 8 is a diagram showing a manufacturing example of a conventional ferrite head.

FIG. 9 is a diagram showing an outline of track deviation.

FIG. 10 is a diagram showing a sliding surface shape of a laminated sendust head used for measurement.

FIG. 11 is a diagram showing an example of sidelight measurement of an ME tape.

FIG. 12 is a diagram showing a sidelight measurement example of a thin layer MP tape.

[Explanation of symbols]

 1 magnetic head 2 leading side track deviation end 3 trailing side track deviation end 4 head advancing direction 5 azimuth 6 preceding recording track 7 tape advancing direction 8 sidewritten area 9 track deviation end 10 high Bs material 11 magnetic gap 12 R azimuth head 13 Track width 14 L azimuth head 15 Track deviation edge shape angle 16 Track angle 17 Welded glass 18 Ferrite piece 19 Track deviation 20 Glass 21 Ceramic substrate 22 Sendust 23 Recording magnetization pattern 24 Trailing side Side by track edge Light 25 Side light by the track end on the leading side 26 ME tape 27 Thin layer MP tape

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[Procedure amendment]

[Submission date] February 21, 1994

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 10

[Correction method] Change

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[Figure 10]

[Procedure Amendment 2]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 11

[Correction method] Change

[Correction content]

FIG. 11

[Procedure 3]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 12

[Correction method] Change

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[Fig. 12]

Claims (6)

[Claims] 1. A signal is recorded on a recording medium, such as a metal film vapor deposition (ME) tape, in which magnetic particles of the medium have an oblique (vertical) orientation, by using a ring-type magnetic head that abuts two pieces to form a magnetic gap. In the magnetic recording / reproducing apparatus for performing the above, among the track shift ends of the magnetic head generated at the time of piece butting, the track shift end located on the trailing side with respect to the magnetic head traveling direction is in the tape traveling direction. A magnetic recording / reproducing apparatus, which is installed on the leading side so as to overlap a track on which a signal has already been recorded. 2. A magnetic recording / reproducing method for recording / reproducing on / from a recording medium such as an ME tape, in which magnetic particles of the medium have an oblique (vertical) orientation, using a ring type magnetic head in which two pieces are butted to form a magnetic gap. In the apparatus, the track width processing dimension of one piece is obviously wider than the track width processing dimension of the other piece, and the track deviation end portion caused by the butt is used for the magnetic head formed only on the wide side piece, and A magnetic recording / reproducing apparatus in which the wide side piece is installed on the trailing side with respect to the head traveling direction. 3. A ring type magnetic head for forming a magnetic gap by abutting two pieces together, using a MIG type head in which a high saturation magnetic flux density material is arranged only in one piece,
In a magnetic recording / reproducing apparatus for recording / reproducing on / from a recording medium in which magnetic particles of a medium such as an ME tape have an oblique (vertical) orientation, a piece side having a high saturation magnetic flux density material is set to a leading side with respect to a head traveling direction, A magnetic recording / reproducing apparatus characterized in that the track offset end of the trailing piece is installed on the preceding recording track side of the recording track pattern on the tape. 4. An azimuth recording is carried out on a recording medium such as an ME tape having a diagonal (vertical) orientation, in which a relative azimuth angle is provided between two magnetic heads recording adjacent tracks. In a magnetic recording / reproducing apparatus, at least a pair of magnetic heads are used, and the shape of the track offset end of each magnetic head is different according to the azimuth angle. apparatus. 5. The magnetic recording / reproducing apparatus according to claim 4, wherein recording is performed by a helical scan method using a rotating drum, and a direction of a projection vector of a magnetic head traveling direction vector in a tape length direction is a tape traveling direction. In the magnetic recording / reproducing apparatus, the relationship between the azimuth angle of the magnetic head and the track shift end is such that when the magnetic head is viewed toward the sliding surface, the gap is tilted counterclockwise (L azimuth angle). Of the magnetic head having an azimuth angle in which the shape of the magnetic core material at the track deviation end portion of the magnetic head having an angle of) is acute (90 ° or less) and the gap is inclined clockwise (R azimuth) toward the sliding surface. A magnetic recording / reproducing apparatus, wherein at least one pair of magnetic heads each having an obtuse angle (90 ° or more) at a track shift end are used. 6. A magnetic head for use in a magnetic recording / reproducing apparatus for recording a signal on a recording medium having magnetic particles of a medium such as an ME tape having an oblique (vertical) orientation, wherein the magnetic head abuts two pieces to form a magnetic gap. Which is a ring type magnetic head for forming heads, and tracks of all the heads cut out from the pieces by intentionally shifting the positions of the two pieces during the work of abutting and welding the two pieces during head manufacturing and forming a gap. A method of manufacturing a magnetic head, wherein the deviations occur in the same direction.