JPH0620212A - Magnetic head and its manufacture - Google Patents

Abstract

PURPOSE:To obtain a magnetic head wherein its dimensional accuracy is good, its bonding strength is high and its reliability is excellent by a method wherein a gas passage which is used to make a gas existing in a bonding region escape in a bonding operation is left in a magnetic core, a magnetic-core support member or a bonding-agent layer. CONSTITUTION:A front core 11A and sliders 59, 60 are bonded by glass layers 2. At this time, grooves 9 as gas passages which are used to make a gas such as air or the like existing in bonding regions in a bonding operation escape are left in the slider 59. Thereby, the gas such as the air or the like existing in the bonding regions escapes and is not mixed with a glass, the bonding strength of a magnetic head is enhanced, and it is possible to obtain the magnetic head whose mechanical strength is high and whose reliability is high.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic head and a method of manufacturing the same, and more particularly, to a magnetic head suitable for writing and reading an information signal to and from a floppy disk and a method of manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, as a magnetic head for a floppy disk, one having a structure as shown in FIG. 21 has been proposed. This magnetic head includes a front core 101 having a recording / reproducing magnetic gap and an erasing magnetic gap.
And a back core 102 having a substantially E-shaped cross section, and a drive coil
A pair of coil bobbins 105 and 106 on which 103 and 104 are wound.
A magnetic head element having a magnetic circuit portion formed by means of and is sandwiched by a pair of non-magnetic sliders 109 and 110 each having a substantially L-shaped cross section in order to secure contact characteristics with a floppy disk.

The front core 101 and the back core 102 are overlapped in a coil bobbin 105, 106 in a so-called stacked state, and the front core 101 and the back core 102 are superposed.
A pair of metal leaf springs 119 and 120 inserted together with 102 are pressed and supported so as to achieve magnetic coupling. In the figure, 111 is a receiving portion for a protrusion (not shown) provided on a carriage or an arm that supports the magnetic head.

The core-slider combination 112, which is formed by sandwiching the front core 101 between the sliders 109 and 110, is manufactured as follows.

That is, as shown in FIG. 22, the slider 109,
Position the front core 101 between 110 and slide the slider 109,
Front core with joints 109a and 110a protruding to the bottom of 110
The lower part of 101 is sandwiched and heated, and the glass layers 2 and 2 serving as the bonding agent, which have been adhered to the bonding parts 109a and 110a in advance, are used for the slider
109, the front core 101, and the slider 110 are fused and bonded.

By the way, in the front core 101, side core parts 117 and 118 are abutted on both sides of a pair of rod-shaped center core parts 115 and 116 which are joined via a non-magnetic material 114 so as not to magnetically interfere with each other. The abutting surfaces each have a first magnetic gap and a second magnetic gap. The first magnetic gap operates as a recording / reproducing magnetic gap, and the second magnetic gap operates as an erasing magnetic gap.

Since the abutting surfaces 101a and 101b are extremely small in order to determine the depth length of these magnetic gaps, the front core 101 is fragile and easily damaged during joining, and the joining area is small and easy to move during joining. Front core 101
However, if it moves, a gap is created between the back core and the back core (102 in FIG. 21) during the subsequent assembly, which is very inconvenient. Further, it is not a good measure from the viewpoint of productivity to preliminarily manufacture the front core 101 and the sliders 109 and 110 having a complicated shape and join them as described above.

Therefore, the material of the front core and slider having a simple shape is joined to form a magnetic head material block, which is then cut into a predetermined shape to improve the productivity and to establish an accurate positional relationship between the front core and the slider. It is possible to guarantee.

That is, as shown in FIG. 20, the slider material 9
The front core material 1 is sandwiched between 9 and 100 and fused and bonded with glass 2 to form a magnetic head material block. Shallow grooves 99a, 99a, 100a are provided in advance in the slider materials 99, 100, and the glass 2 is fitted in these grooves. The magnetic head material block is formed by grinding as shown in FIG.
Is finished into a core-slider combination having a shape similar to the above.

However, this method also has the following problems.

As shown in FIG. 3, the front core material 1 is provided with a pair of through holes 7a, 8a having inclined surfaces in order to determine the depth length of the magnetic gap. The through holes 7a and 8a are sealed by the slider materials 99 and 100 (see FIG. 20) at the time of joining, and the air in the through holes 7a and 8a cannot escape under the melting temperature of glass as a bonding agent.

As a result, the glass 2 comes to protrude from the surface of the slider materials 99 and 100, as shown in FIG.
The dimensional accuracy becomes poor. In addition to this, bubbles are generated in the glass to reduce the effective bonding area between the front core material and the slider material, and the bonding strength tends to be insufficient.

[0013]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances and has good dimensional accuracy, sufficiently high bonding strength between a magnetic core and a magnetic core supporting member, and high reliability. An object of the present invention is to provide an excellent magnetic head and a manufacturing method thereof.

[0014]

In order to achieve the above object, the present invention is constructed as follows.

The first invention has a magnetic core, a magnetic core supporting member, and a bonding agent layer for bonding the magnetic core and the magnetic core supporting member to each other. The present invention relates to a magnetic head in which at least one of the bonding agent layers has a part of a gas passage for allowing gas existing in the bonding region to escape during the bonding.

A second invention is a magnetic head material block obtained by bonding a magnetic core material and a magnetic core supporting member material to each other with a bonding agent layer, wherein the magnetic core material, the magnetic core supporting member material, and The present invention relates to a magnetic head manufactured by cutting out from a magnetic head material block in which at least one of the bonding agent layers is provided with a gas passage for letting out a gas existing in a bonding region during the bonding.

In the magnetic head according to the first invention, a part of the gas passage is left after cutting out from a magnetic head material block described later, and the magnetic head according to the second invention. In that case, it does not matter whether a part is left after the cutting out or disappears.

A third aspect of the invention is to manufacture a magnetic head having a structure in which a magnetic core and a magnetic core supporting member are bonded to each other, wherein a bonding agent layer is formed on the bonding surface of the magnetic core material and / or the magnetic core supporting member material. And a step of providing a gas passage for releasing gas existing in a bonding area at the time of bonding in at least one of the magnetic core material, the magnetic core supporting member material, and the bonding agent layer, and the magnetic core material. A method for manufacturing a magnetic head, comprising: a step of joining the magnetic core supporting member material and the magnetic core supporting member material by the bonding agent layer to form a magnetic head material block; and a step of cutting the magnetic head material block into a magnetic head shape. .

[0019]

EXAMPLES Examples of the present invention will be described below.

Example 1 FIG. 1 is a perspective view of one slider material, FIG. 2 is a perspective view of the other slider material, and FIG. 3 is a perspective view of a front core material. The slider materials 9 and 10 are substantially rectangular parallelepipeds made of a non-magnetic material (for example, calcium titanate or barium titanate).

A shallow groove 9a, 9a having a wide width is provided on one surface of the slider material 9 in the horizontal direction, and the glass 2 having a low melting point is fitted in the groove 9a, 9a. The glass 2 is provided with narrow grooves 9b and 9c up to the slider material 9.
A wide and shallow groove 10a is formed on the upper part of one surface of the slider material 10.
Is provided in the horizontal direction, the glass 2 is fitted in the groove 10a,
A deep groove 10b is horizontally provided in the lower slider material portion near 10a.

The front core material 1 includes elongated core portions 5 and 6 with a non-magnetic material 14A sandwiched between them, and plate-shaped core portions 7 and 8 with non-magnetic materials 14B and 14C sandwiched between the core portions 5 and 6, respectively. The plate-shaped core portions 7 and 8 are provided with through holes 7a and 8a, respectively, for determining the depth length of the magnetic gap in later processing. The non-magnetic materials 14A, 14B, and 14C are made of high-melting glass (for example, melting point 700 ° C.), and the front core material 1 is manufactured by fusion with these. This front core material is for the leading erase-type front core.

The core-slider assembly is manufactured through the steps shown in FIGS.

First, as shown in FIG. 4, the slider materials 9 and 10 are made to face each other so that the surfaces on the glass 3 side face each other, and the front core material 1 is positioned between them.

Next, as shown in FIG. 5, the slider material 9, the front core material 1, and the slider material 10 are butted.
For example, the glass 2 is melted by heating at 500 ° C., and then cooled and solidified. In this way, the slider material 9,
The front core material 1 and the slider material 10 are joined to form a magnetic head material block 61A.

At the time of the above-mentioned joining, the air in the through holes 7a and 8a is discharged to the outside of the magnetic head material block 61A through the upper groove 9b of the slider material 9 even if it is expanded by heating. The air adsorbed on the glass 2 of the slider material 10 is also discharged to the outside of the magnetic head material block 61A through the through holes 7a and 8a and the groove 9b of the slider material 9. Further, the air adsorbed on the lower glass 2 of the slider material 9 also passes through the lower groove 9c and the magnetic head material block 61.
It is released outside A. Therefore, the glass 2 does not stick out from the side surface of the magnetic head material block 61A, and bubbles do not occur in the glass 2 to reduce the bonding strength.

Next, the magnetic head material block 61A is turned upside down and the bottom surface is ground to form grooves and chamfers (chamfering) as shown in FIG.

Next, the slider materials 9 and 10 are ground parallel to the surface of the front core material 1 to form the shape shown in FIG. Next, in the direction orthogonal to the surface of the front core material 1, the portions of the slider materials 9 and 10 and the front core material 1 are
Is ground to obtain a core-slider combination 61B in FIG. The two steps of the grinding process in the directions orthogonal to each other may be performed in the reverse order to the above order. In this case, the process of FIG. 6 is followed by the process of FIG. 8 and then the process of FIG. 7 to obtain the core-slider assembly 61B of FIG.

The core-slider assembly 61B manufactured as described above has the following structure.

A pair of sliders 59 and 60 are butted against each other, and a center core portion 15 having a nonmagnetic material 14 sandwiched between the sliders 59 and 60,
16 and side core portions 17 and 18 (the front core 11A is constituted by these core portions) are sandwiched.

On one slider 59, the side core portion 17,
Reinforcing leg portions 45, 46, 47 which stand in contact with 18 and the center core portions 15, 16 to reinforce the mechanical strength of these core portions are erected. On the other slider 60, joining legs 48, 49, 50 for joining to a gimbal (not shown) are provided upright at positions corresponding to the center cores 15, 16 and the side cores 17, 18, respectively. ing.

Grooves 10 provided in the slider material 10 of FIGS.
b is the center core parts 15 and 16 and the side core parts 17 of FIG.
This makes it easy to form the reinforcing portion 60a at the base of 18. In FIG. 6, the portion of the slider material 10 to be removed by grinding is shown by imaginary lines.

The grooves 9b and 9c are formed as shown in FIG. First, as shown in FIG. 10 (a), the glass 2 is fused to the grooves 9a, 9a. At this time, the glass 2 is filled in the grooves 9a and 9a so as to rise from the surface of the slider material 9. Next, in FIG. 10 (a), the surplus portion 2a on the right side of the imaginary line is shaved off, and then the grooves 9b, 9c are cut up to the slider material 9 as shown in FIG. 10 (b).

As shown in FIG. 11, the other slider material 10 may be provided with a groove 10c in the layer portion of the glass 2 as well. Further, as shown in FIG. 12, the grooves 9b-2 and 9c-2 may be formed only in the layer portion of the glass 2. In this case, the core-slider assembly after joining and grinding,
The grooves 9b-2 and 9c-2 may be filled with glass and may not remain as grooves.

The core-slider assembly 61B manufactured as shown in FIGS. 1 to 9 is assembled as shown in FIG. 13 to form the magnetic head shown in FIG.

The magnetic head 3 is a front core 11 which serves as a magnetic core forming a closed magnetic path mainly through a magnetic gap.
A and a back core 11B, and a pair of coil bobbins 12 and 13 around which a drive coil fitted and arranged in the front core 11A and the back core 11B is wound.

In the front core 10, side core parts 17 and 18 are abutted on both sides of a pair of rod-shaped center core parts 15 and 16 joined via a non-magnetic material 14 so as not to magnetically interfere with each other. The mating surfaces respectively have a first magnetic gap and a second magnetic gap (both hidden by the slider 60 and not visible). The first magnetic gap operates as a recording / reproducing magnetic gap, and the second magnetic gap operates as an erasing magnetic gap.

On the other hand, the back core 11B is a pair of core members formed corresponding to the core shape of the front core 11A.
It is configured by joining 19 and 20 on the side surface side via a non-magnetic material 55.

The core members 19 and 20 are the front core 11A.
Has center leg portions 21 and 22 and side leg portions 23 and 24 at positions facing the center core portions 15 and 16 and side core portions 17 and 18, respectively. It is said to be a state. Therefore, the center legs 21, 22 and the side legs
By providing 23 and 24, it is possible to secure a joint area between the cores that increases the length of the front core 11A in the depth direction, and it is possible to improve electromagnetic conversion characteristics.

The coil bobbins 12 and 13 are made by insert-molding the external terminals 27 and 28 formed by stamping a hoop material, and the body portion around which the drive coils 29 and 30 are wound, and the body portion. A pair of upper and lower flange portions 31, which regulate the winding position of the drive coils 29, 30 wound around the portion in the height direction,
32, 33, and 34.

A predetermined number of windings of one drive coil 29 are wound around the coil bobbin 12 through which the side core portion 17 of the front core 11A on the side where the magnetic gap for erasing is formed is inserted, and the start and end of the winding are external terminals. They are wrapped around 27 respectively.

On the other hand, the coil bobbin 13 into which the side core portion 18 of the front core 11A on the side where the recording / reproducing magnetic gap is formed is inserted with a predetermined number of two drive coils 30, and the start and end of the winding are wound. And common part (common)
Are respectively wound around three external terminals 28.

On the other hand, the flange portions 31, 33 attached to the movable arm side, which will be described later, have terminal support portions for supporting the external terminals 27, 28 along one side edge of the coil bobbins 12, 13 on the opposite side to the opposite side. 35 and 36 are provided as thick projections. The external terminals 27 and 28 are set up on the terminal support portions 35 and 36 at predetermined intervals, respectively.

The front core 11A and the back core 11
B is a through hole 12a provided in the coil bobbins 12 and 13,
Within the side 13a, the side core portions 17 and 18 of the front core 11A and the side leg portions 23 and 24 of the back core 11B come into contact with each other and are superposed in a so-called stacked state. That is, one side surface of the side core portion 17
17a and one side surface 23a of the side leg portion 23 are in contact with each other for magnetic coupling, and one side surface 18a of the side core portion 18 and one side 24a of the side leg portion 24 are in contact with each other for magnetic coupling. , A closed magnetic circuit is constructed.

Therefore, the front core 11A and the back core 11
B, by the coil bobbins 12 and 13, a magnetic head element having a first magnetic gap that operates as a recording / reproducing magnetic gap, that is, a recording / reproducing head, and a magnetic head element having a second magnetic gap that operates as an erasing magnetic gap. A head element, that is, an erasing head is configured.

Further, the through holes 12a of the coil bobbins 12 and 13,
A core pressing member 39 for magnetically coupling the front core 11A and the back core 11B is inserted in the inside 13a. The core pressing member 39 is made of a thin metal leaf spring, and together with the side core portions 17 and 18 of the front core 11A and the side leg portions 23 and 24 of the back core 11B, the coil bobbins 12 and 13 are formed.
It has core pressing pieces 40, 41 to be inserted therein and a connecting portion 42 for connecting these.

The core pressing pieces 40, 41 are provided so as to hang down in the direction of the front core 11A from both longitudinal ends of the connecting portion 42, and are integrally provided on the connecting member 42. The tips of the core pressing pieces 40, 41 are bent in a dogleg shape, and the elastic force of the bent portions 40a, 41a presses the back core 11B against the front core 11A.

Core holding member 39 formed as described above
Of the core bobbin portions 40 and 41 contact the inner walls of the through holes 12a and 13a in the through holes 12a and 13a of the coil bobbins 12 and 13, respectively, and the bent portions 40a and 41a contact the back core 11B. A part of the portion 42 comes into contact with the outer peripheral edges of the through holes 12a and 13a and bends to press and support the side leg portions 23 and 24 of the back core 11B against the side portions 17 and 18 of the front core 11A.

As a result, the side core portions 17 and 18 and the side leg portions 23 and 24 are pressed and supported, and the magnetic and mechanical coupling between the side core portions 17 and 18 and the side leg portions 23 and 24 is ensured. . Therefore, there is no gap between the front core 11A and the back core 11B, and there is no inconvenience that the gap acts as a back gap when the magnetic head is driven.

In the magnetic head 3 having the above structure, a pair of sliders 59 and 60 are attached to the side where the recording / reproducing magnetic gap and the erasing magnetic gap are provided so as to ensure the contact characteristics with the floppy disk. Has been done.

Each of the above parts is housed in a magnetic shield member 51 having a rectangular frame shape to form the magnetic head 3 shown in FIG. The magnetic shield member 51 is made of ferrite, for example. This magnetic head is a magnetic head for a floppy disk that records and reproduces information signals on a 3.5 inch floppy disk.

As shown in FIG. 15, the magnetic head assembly having the magnetic head 3 and the magnetic head 4 having the same structure as the magnetic head 3 constitutes a head supporting member fixed to a guide bar or the like of the main body of the floppy disk drive (not shown). A carriage 63 and a movable arm 62 rotatably attached to the carriage 63 in the direction of the arrow X in the figure, and the carriage 63 and the magnetic heads 3 and 4 provided on the tip side of the movable arm 62, respectively. Recording and reproduction are performed on both sides of the floppy disk 55.

The magnetic heads 3 and 4 are provided with carriages via gimbals 56 and 57, which are flexible metal leaf springs.
It is attached to the movable arm 62 or the movable arm 62 in the circumferential or radial direction of the disk so as to exhibit good followability with respect to the movement of the disk.

Further, the magnetic head 3 attached to the movable arm 62 is pressed by a tension spring stretched between the movable arm 62 and the carriage 63 via a spherical protrusion 58 called a pivot. It follows the disc 55 and moves up and down. That is, the magnetic head 3 is moved back and forth, left and right and up and down with the protrusion 58 as a fulcrum, and the contact state with the disk 55 is always kept constant. In addition,
Similarly, the carriage 63 is also provided with a protrusion 59 so that the contact state of the magnetic head 4 with the disk 55 is always kept constant.

In the magnetic head assembly having the above-described structure, during the chucking operation of the floppy disk 55,
The movable arm 62 is attracted toward the carriage 63 by a tension spring, and the floppy disk 55 is sandwiched between the magnetic heads 3 and 4 facing each other.

<Embodiment 2> FIGS. 16 and 17 are perspective views similar to FIG. 4, showing an example in which a groove as an air passage is provided not in the slider material but in the front core material.

In the slider material 69 corresponding to the slider material 9 in FIG. 4, only the grooves 69a and 69a filled with the glass 2 are provided, but no groove is provided. The other slider material is shown in Figure 4.
There is no difference from the slider material 10 of.

In the front core material 71 of FIG. 16, grooves 71a, 71 communicating with the through holes 7a, 8a are formed on the surface of the slider material 69 side.
a is provided horizontally. The front core material 81 of FIG. 17 has grooves 81a, 81a similar to those described above provided in the vertical direction.

FIGS. 18 and 19 are perspective views similar to FIG. 9 of a core-slider assembly using the front core materials 71 and 81 of FIGS. 16 and 17, respectively. Core-slider combination 61
C and 61D are manufactured through the same steps as those in FIGS.

In the process shown in FIG. 5, the air in the through holes 7a and 8a is allowed to flow into the groove 71a when the glass 2 is fused and bonded.
It is discharged to the outside through 71a or the grooves 81a, 81a. The air adsorbed on the glass 2 is also discharged to the outside through the through holes 7a and 8a and the grooves 71a and 71a or the grooves 81a and 81a. Therefore, in both cases, the bonding strength is not lowered due to the rise of glass and the generation of bubbles.

In the core-slider combination 61C of FIG. 18, the slider 69 has no groove and the front core 91 has a part of the groove 71a left. In the core-slider combination 61D shown in FIG. 19, the groove 81a of the front core material 81 shown in FIG. 17 was present at a location to be scraped off by the grinding process, and therefore the trace of the groove as the air passage including the front core 92 remains. It has not been.

Although the embodiments of the present invention have been described above, various modifications can be added to the above embodiments based on the technical idea of the present invention.

For example, in order to connect the front core and the pair of sliders to each other, other suitable binder or adhesive can be used besides glass. Even if gas is generated from the adhesive when bonding with the adhesive, the groove as the air passage described above functions similarly as the gas passage, resulting in undesired rise of the adhesive and generation of bubbles due to the generated gas. There is no risk of lowering the adhesive strength.

A space such as a groove as an air passage does not have to be communicated with the outside as long as it has a volume that does not increase the pressure to the extent that it hinders joining.

Further, the magnetic head according to the present invention has 3.5
It is suitable for an inch floppy disk, a floppy disk of another size, or a magnetic recording medium other than a floppy disk.

[0066]

In the magnetic head according to the present invention, the material of the magnetic core and the magnetic core supporting member is cut out from the magnetic head material block bonded by the bonding agent layer, and each of the materials and the bonding agent layer is cut. At least one of them is provided with a gas passage for letting out the gas existing in the bonding region, so that the effective bonding area is not reduced by the gas and the bonding strength is not lowered, and the mechanical strength is sufficient and the reliability is high. Is high.

Further, since the magnetic head is manufactured by being cut out from the magnetic head material block, the positional relationship between the respective materials does not change at the time of joining, and the dimensional accuracy is good.

[Brief description of drawings]

FIG. 1 is a perspective view of one slider material according to a first embodiment.

FIG. 2 is a perspective view of the other slider material.

FIG. 3 is a perspective view of a front core material of the same.

FIG. 4 is a perspective view showing a state in which a front core material is positioned between a pair of slider materials.

FIG. 5 is a perspective view of the magnetic head material block of the same.

FIG. 6 is a perspective view of the raw material in the first step of the grinding process.

FIG. 7 is a perspective view of the raw material in the second step of the grinding process.

FIG. 8 is a perspective view of the raw material in the third step of the grinding process.

FIG. 9 is a perspective view of the core-slider assembly.

FIG. 10 is a front view showing a way of forming grooves as air passages.

FIG. 11 is a perspective view showing a modified example of the slider material of FIG.

FIG. 12 is a perspective view showing a modified example of the slider material of FIG. 1.

FIG. 13 is an exploded perspective view of the magnetic head of the same.

FIG. 14 is a perspective view of the magnetic head of the same.

FIG. 15 is a schematic cross-sectional view showing a usage state of the magnetic head.

FIG. 16 is a perspective view showing a state in which a front core material is positioned between a pair of slider materials in the first example of the second embodiment.

FIG. 17 is a perspective view showing a state in which a front core material is positioned between a pair of slider materials in the second example.

18 is a perspective view of the core-slider assembly manufactured from the material of FIG. 16.

19 is a perspective view of the core-slider assembly manufactured from the material of FIG.

FIG. 20 is a perspective view of a conventional magnetic head material block.

FIG. 21 is an exploded perspective view of another conventional magnetic head.

FIG. 22 is a perspective view showing a state where the front core is positioned between the pair of sliders.

[Explanation of symbols]

1, 71, 81 Front core material 2 Glass (bonding agent) 3, 4 Magnetic heads 7a, 8a Through hole 9, 10, 69 Slider material 9a, 10a, 69a Glass fitting groove 9b, 9b-2, 9c, 9c- 2, 10c, 71a, 81a
Air passage groove 11A, 91, 92 Front core 11B Back core 59, 60, 70 Slider 61A Magnetic head material block 61B, 61C, 61D Core-slider combination

Claims (3)

[Claims] 1. A magnetic core, a magnetic core supporting member, and a bonding agent layer for bonding the magnetic core and the magnetic core supporting member to each other, and the magnetic core, the magnetic core supporting member, and the bonding agent layer. At least one of them is a magnetic head in which a part of a gas passage for letting out a gas existing in a bonding region at the time of the bonding is left. 2. A magnetic head material block obtained by bonding a magnetic core material and a magnetic core supporting member material to each other with a bonding agent layer, the magnetic core material, the magnetic core supporting member material, and the bonding agent layer. A magnetic head produced by cutting out from a magnetic head material block provided with a gas passage for releasing gas existing in a bonding area in at least one of the above. 3. When manufacturing a magnetic head having a structure in which a magnetic core and a magnetic core supporting member are bonded to each other, a step of providing a bonding agent layer on the bonding surface of the magnetic core material and / or the magnetic core supporting member material. At least one of the magnetic core material, the magnetic core support member material, and the bonding agent layer, a step of providing a gas passage for letting out a gas existing in a bonding region at the time of bonding, the magnetic core material and the magnetic core A method of manufacturing a magnetic head, comprising: a step of joining a supporting member material with the bonding agent layer to form a magnetic head material block; and a step of cutting the magnetic head material block into a magnetic head shape.