JPS61129712A - Production of magnetic head for vertical magnetic recording - Google Patents

Abstract

PURPOSE:To assure the accuracy of working and to make possible mass production by forming a recess for contg. a coil for erasing around the 1st leg part for erasing erected on the core for erasing and fitting respectively a coil for recording and reproducing and the coil for erasing into the 1st leg parts for recording and reproducing and for erasing. CONSTITUTION:A hollow groove 46 is formed at the prescribed depth in a separator forming part 45 of a core blank 42 so as to penetrate to the other end face from one end face. A non-magnetic material such as low melting glass in a molten state, synthetic resin or non-magnetic metal having tackiness is poured into the hollow groove 46 and is cooled and solidified to form the separator 41. Grooves 48, 49 and groove 50 approximately parallel with the longitudinal direction of the separator 41 and grooves 51 and 52 intersecting orthogonally with such grooves are formed by machining from the groove bottom part 47 side of the core blank 42 toward the separator 41 side. The central leg part 53 for recording and reproducing and the central leg part 54 for erasing are erected at approximately the center of the core assemblage 26 at the space corresponding to the thickness of the separator 41. The assurance of the accuracy of working and the mass production are made possible.

Description

[Detailed description of the invention] [Field of application of the invention] The present invention relates to a magnetic head for perpendicular magnetic recording.

In particular, the present invention relates to a main pole excitation type overlapping magnetic recording magnetic head.

[Prior art]

Traditional main li! The seat excitation type perpendicular magnetic recording magnetic head (hereinafter referred to as magnetic head) is f! Figure B12 (a), (b
) has been adopted. FIG. 5A is a perspective view of the magnetic head, and FIG. 1B is an exploded perspective view of the magnetic head.

Reference numeral 1 denotes a slider assembly on the recording/reproducing side, and the slider assembly 1 includes a slider member 2 made of ceramics, non-magnetic ferrite, etc., on which a winding 2a and a protrusion 2b are formed, and a slider member 2. a substantially flat magnetic core 3 made of a magnetic material such as ferrite fixed with resin or molten glass on the winding 2a side and in close contact with the inner side 2c of the protrusion 2b; and the slider member. A magnetic thin film for recording and reproducing made of a Co-based amorphous, permalloy-based, or sendust-based magnetic material is formed on the flat part formed by the protrusion 2b of 2 and the surface 3a of the magnetic core 3 that is not in contact with the slider member 2. 4 is formed by sputtering, vapor deposition, or the like.

Also, symmetrically with the slider assembly on the recording/reproducing side,
An erase side slider assembly 5 is formed. The slider assembly 5 includes a slider member 6 made of ceramics, non-magnetic ferrite, etc., in which a winding groove 6a and a protrusion 6b are formed.

On the winding groove 6a side of the slider member 6 and the protrusion 6b
A substantially flat magnetic core 7 made of a magnetic material such as ferrite that is tightly fixed to the inner side 6c of the slider member 6 with resin or molten glass, the projection 6a of the slider member 6 and the slider member 6 of the magnetic core 7 A magnetic thin film 8 for erasing made of a Co-based amorphous, permalloy-based, or sendust-based magnetic material is formed on the flat portion 7 by sputtering, vapor deposition, or the like.

Further, 9 is a central slider member, and the central slider member 9 includes the winding grooves 2a of the slider members 2 and 8;
Winding grooves 9a and 9b are formed in the portion facing 6a.

The magnetic head combines the slider assembly 1, the central slider member 9, and the slider assembly 5.The magnetic thin film 4 and the magnetic thin film 8.8 are first assembled together.
As shown in FIG. 3, the data recorded in the effective recording width 13 of the magnetic thin film 4 is tunnel-erased by a pair of magnetic thin films 8.8, and the magnetic thin films 1114 and 8. After adjusting the position, the adhesive M resin or molten glass 10 is used to fix it. Note that an arrow 15 in the figure indicates the running direction of the magnetic recording medium (not shown).

After that, the winding 11 for recording and reproduction and the winding 12 for erasing
The magnetic head is completed by polishing or lapping the sliding surface with the magnetic recording medium (not shown).

[Conventional technology and problems]

By the way, in the above-described conventional magnetic head, the inner side 2C16c of the protrusions 2a, 6a of the slider member 2.6 and the magnetic core 3.7 are fixed in close contact with each other.

If the magnetic @1IA4.8 is not formed after the protrusions 2b, 6b and the side surfaces 3a, 7a of the magnetic core 3.7 which are not in contact with the slider members 2, 6 are made on the same plane, the slider Projection 2b of one member 2.6.

A gap is created between the inner sides 2c, 6c of 6b and the magnetic cores 3, 7, and the magnetic thin film [4, 8] is cut off at the joint surface between the slider member 2.6 and the magnetic cores 3, 7. Also, slider part 2
．． The same thing can be said when there is a step difference between the magnetic core 3.6 and the magnetic core 3.7, and no magnetic circuit is formed. Therefore, the protrusion 2a-'6a of the slider member 2.6 and the magnetic core 3.7
side 3a.

7A must be on the same plane, and the slider assembly [3 central slider member 9. After combining with the slider assembly 5, the magnetic film 7#, the film 4 and the magnetic thin film 8 are aligned, and then the slider assembly 1° center slider member 9. Three parts of the slider assembly 5 must be fixed, so not only does alignment take time, but workability is also very poor, and it is difficult to ensure alignment accuracy, requiring the skill of one operator. . Furthermore, the slider assembly [and the central slider part 9. A sliding contact surface with a magnetic recording medium for fixing in combination with the slider assembly 5.

In other words, as shown in FIG. 12(a), the upper surface 2d of the slider assembly 1, the upper surface '3 of the central slider member 9
C. A step is likely to occur between the top surface 6d of the slider assembly 5 and a polishing step is required to remove this step and make the same surface.

In addition, in the conventional structure, one center slider member 9 has a winding of 1 m.
'tW9a, 9b are provided, and in order to secure the winding grooves 9a, 9h, the magnetic thin film 4 and the magnetic thin film 8.
There is a limit to how short the distance from 8 can be.

When attempting to perform high-density recording using a magnetic recording medium with a small curvature, such as 3 inches or 3.5 inches, the standard
will receive.

Furthermore, as shown in Fig. 12(b), the thin wire of one winding 11°12 must be wound into the thin winding hole formed by the central slider member 2.6, otherwise the workability will be poor and the wire will easily break. ,
Further, there are drawbacks such as a large number of man-hours for winding, and in addition, machines cannot be used and one operator needs to be highly skilled.

[J! OBJECTIVES OF THE INVENTION The present invention has been made in view of the above-mentioned drawbacks of the conventional technology, and its objectives are to easily ensure machining accuracy, have excellent workability, be easy to manufacture, and be manufactured in large quantities. An object of the present invention is to provide a magnetic head for overlapping magnetic recording that can be produced and a method for manufacturing the same.

[Summary of the invention]

In order to achieve the above-mentioned object, the present invention is made of a non-magnetic material in which a magnetic g film for recording/reproducing and a magnetic g film for erasing, which are disposed perpendicularly to the recording surface of a magnetic recording medium, are supported apart from each other. a thin film support member, a first leg for recording and reproducing around which a coil for recording and reproducing is wound in contact with the end of the magnetic thin film for recording and reproducing that does not come into sliding contact with the magnetic recording medium, and the first leg for recording and reproducing; a recording/reproducing core having a second recording/reproducing leg disposed in parallel with the recording/reproducing core; and an erasing coil is wound in contact with the end of the erasing magnetic thin film on the side that does not come into sliding contact with the magnetic recording medium. Perpendicular magnetic recording in which a core assembly comprising an erasing core having a second erasing leg and a separator made of a non-magnetic material interposed between the recording and reproducing core is joined together. In magnetic heads for use.

An assembly in which the recording/reproducing core element and the erasing core element are connected together with a separator element interposed therebetween.
This assembly has a second groove almost parallel to the separator and in the middle on the separator! A, a first groove, a second groove, and a third groove are formed at a predetermined interval so that the grooves are formed, and a fourth groove and gM5 groove are formed at a predetermined interval so as to be substantially orthogonal to these grooves. By forming the first leg for recording and reproduction on the recording and reproduction core, the first leg for recording and reproduction and the second leg for recording and reproduction are erected, and the coil for recording and reproduction is housed around the first leg for recording and reproduction. A recess is formed, a first erasing leg and a second erasing leg are erected on the erasing core, and an erasing coil storage recess is formed around the first erasing leg to form a fla shape. Molded into 9 8Jl! The present invention is characterized in that a reproducing coil and an erasing coil are respectively fitted into the first leg for recording and reproducing and the first leg for erasing.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings. 1st
FIG. 2 is an exploded perspective view of a magnetic head according to one embodiment, and FIG. 2 is a longitudinal sectional view showing the state in which the magnetic head is used.

The magnetic head consists of a main pole block 21 and an auxiliary pole block 2.
2, and is run in the direction 24 with a magnetic recording medium 23 sandwiched between them as shown in FIG.

The main pole block 2t is composed of a thin film support member 25 that is in sliding contact with the magnetic recording medium 23, and a core assembly 26 that is integrally joined to the thin film support member 25.

First, the structure of the single membrane support member 25 and its i-method will be explained. As shown in FIG. 1, the thin film supporting member 25 is a thin film supporting member 28 for recording and reproducing which supports one magnetic thin film 27 for recording and reproducing on its end face.

Two erasing magnetic thin films 29 are arranged at a predetermined interval on the end face.
the erasing thin film support member 30 supporting the supporting member 2;
8.30 and an intermediate body 31 interposed between them are integrally joined. Since the support members 28, 30 and the intermediate body 31 are non-magnetic and have a sliding surface with the magnetic recording medium, they are required to have mechanical properties such as wear resistance. Examples include carbon composites, ceramics, glass, and non-magnetic ferrite.

Among these, carbon composite materials are mainly composed of a carbon porous body, a metal that fills the voids in the carbon porous body, and a synthetic resin that closes the filled voids. There is.

Next, this composite material will be explained in detail. The carbonaceous materials used include natural graphite, artificial graphite, coal coke, petroleum coke, carbon black, and coal powder. It may be a mixture of.

These carbon materials have excellent self-lubricating properties.

Mechanical strength is not sufficient, which is why a mechanical strength enhancing material is used, but a binding material and an impregnating material can also be used in combination with this mechanical strength enhancing material.

As the binder, a resin binder, a pitch coke binder, or the like is used. Examples of the resin binder include various thermosetting resins such as phenol*a, divinylbenzene resin, furan resin, and epoxy resin; l
Various thermoplastic resins such as l#4 resin and polyacetal resin are used. After binding, this resin binder can be heat-treated in an inert atmosphere to partially carbonize and graphitize it.

The pitch coke binder is made by using coal pitch or petroleum pitch as a binder and sintering it after binding to form pitch coke.

The sintered body of the carbon material and the mechanical strength enhancing material has insufficient mechanical strength because fine voids are formed on its surface and inside. To this end, the voids in the carbon porous body are filled with a metal impregnating material to improve mechanical strength.

The metal impregnating material includes tin and antimony.

Copper, zinc, silver, lead, aluminum, magnesium, cadmium, etc. may be used alone or in an alloy thereof.

The metal impregnating material is impregnated at a temperature of about 50-100° C. above its melting point.

When the entire surface impregnated material is cooled, fine pores may be formed on the surface or inside the material.

When such fine pores are formed, the mechanical strength also decreases, so the pores are filled with a synthetic resin to close the pores, thereby increasing the mechanical strength.

Said synthesis 41! As the resin, phenol resin, divinylbenzene resin, epoxy resin, furan resin, fluororesin, polyethylene resin, polypropylene resin, polyamide resin, etc. are used.

The content of the carbon material in the composite material of the carbon material and the mechanical strength enhancing material is approximately 50 to 95% by volume.

If the carbon material content is lower than this, sufficient lubricity will not be obtained, while if the carbon material content exceeds about 95% by volume, the mechanical strength will be too low.

As mentioned above, there is a magnetic thin film @27 on the end face of the support member 28, 30.
．． However, the magnetic thin films 2'7, 2'9 cannot be directly formed on the end faces thereof.

That is, the surface of the support member 28.30 made of carbon composite material, ceramics, non-magnetic ferrite, etc. has micropores and minute irregularities on the surface even after being polished, and the magnetic thin film 115827.29 is directly formed on the surface. Therefore, in the magnetic head of the present invention, as shown in FIG. did.

This organic polymer film 32 is formed into a magnetic thin film 2 in a 1gi process.
Since it is exposed to high temperatures when forming the 7.29, polyimide cord resin, which has particularly excellent heat resistance, is preferred, but other silicone resins and polyamide resins can also be used. Organic polymer li! A method for forming ll32 is the so-called spinner method, in which the support member 28.30 is rotated at high speed and the centrifugal force at that time is used to spread a polymer resin solution on the surface of the support member 28.30 to form a film. It is the number of strokes.

In this way, the organic polymer film 3 is attached to the end face of the support member 28.30.
By forming No. 2, a surface with extremely low surface roughness can be obtained, but it is not without problems. That is, the coefficient of thermal expansion of the organic polymer film 32 is extremely large compared to that of the magnetic thin films 27 and 29 made of metal materials. That is, the thermal expansion coefficient of the magnetic thin film 27129 is about 100 to 11
0x10"7c+n/cm/T: On the other hand, for example, in the case of the organic polymer film 32 of polyimide resin,
Thermal expansion coefficient is approximately 400-800 x 10-7e+m/
cm/”C.

There is a considerable difference between the two. Therefore, if the magnetic film 27.29 is formed directly on the organic polymer film 32, when the temperature around the magnetic head becomes low or high, the organic polymer 1]g32 and the magnetic thin film 27.29 may The difference in thermal expansion coefficients causes internal stress in the magnetic thin film 27, 29, reducing its magnetic properties.

Therefore, in the magnetic head of the present invention, the surface of the organic polymer film 32 has an intermediate layer 11 having a thermal expansion coefficient close to that of the magnetic thin film 27.29.
133 was formed, and magnetic thin films 27 and 29 were provided thereon. This middle part [1133 is a non-magnetic material. For example, alumina, silicon dioxide, or a non-magnetic metal is used, and the intermediate film 33 is typically formed by sputtering or vapor deposition in order to take advantage of the flatness obtained by the organic polymer film 32. . The thermal expansion coefficient of the intermediate film 33 made of alumina is approximately 80 x 10-7 cm/
cm/℃, for silicon dioxide it is approximately 4X10-
7 am/cI at 11° C., which is close to the coefficient of thermal expansion of a magnetic thin film of 27.29.

The magnetic thin film 27, 29 formed on the surface of the intermediate film 33 is made of a Go-based amorphous material such as Co-ZrNb or Go-Hf-Ta, permalloy, sendust, etc., and thin film formation techniques such as sputtering and vapor deposition are used. It is provided to a predetermined thickness using

The intermediate film 33 is placed on the surface on which the magnetic film @27.29 is formed.
Similarly, a first protective film 34 is made of alumina, silicon dioxide, or a nonmagnetic metal and is nonmagnetic and hard, and a second protective film [15135] is made of an organic polymer such as polyimide resin, silicone resin, or polyamide resin. are sequentially formed in a laminated state. If the magnetic film @27.29 is sandwiched between the relatively hard intermediate film 33 and the first protective film 34, the intermediate film 33 and the first protective film 34 will be formed.
serves as a reinforcement for the magnetic film 11927.29.

It is possible to prevent the ends of the magnetic films 27 and 29 from sagging due to sliding contact with the magnetic recording medium.

After that, the second protection i of the thin film support member 28 for recording and reproduction is performed.
! i 35 and the second protection i of the erasing thin film support member 30
! Adhesive M36 is formed on each film 35, and the intermediate body 3
The thin film supporting member 25 is constructed by pressing the recording/reproducing thin film supporting member 28 and the erasing thin film supporting member 30 with the royal tape 1 in between to join the royal palace together.

Next, the structure of the core assembly 26 and its manufacturing method will be explained. The core assembly 26 is shown in FIGS. 1 and 41! ! As shown in FIG. 2, the 2@reproducing core 38 around which the recording/reproducing coil 37 is wound, the erasing core 40 around which the erasing coil 39 is wound, and the space between the recording/reproducing core 38 and the erasing core 40. A separator 41 made of a non-magnetic material is interposed therebetween.

5 and 6 are perspective views showing an example of a method for manufacturing the core assembly 26. FIG. In this example, the recording/reproducing core 38
The erasing core 40 is produced from one block-shaped core body 42 made of ferrite or the like. That is, the fifth
As shown in the figure, a groove 46 penetrates between the recording/reproducing core forming part 43 and the erasing core forming part 44 of the core body 42, that is, the separator forming part 45 from one end surface to the other end surface. It is formed with a predetermined depth so as to Even if the 1Ml groove 46 is formed, its groove bottom 47
The recording/reproducing core forming portion 43 and the erasing core forming portion 44 are integrally connected via the core forming portion 43 for recording and reproducing. Next, this M groove 46
A non-magnetic material having binding properties such as molten low-melting glass, synthetic resin, or non-magnetic metal is poured into the inside, and is cooled and solidified to form the separator 41.

Thereafter, as shown in FIG. 6, a first groove 48.sub.48.sub.1 is formed from the groove bottom 47 side of the core body 42 toward the separator 41 side, and is substantially parallel to the longitudinal direction of the separator 4t. Second groove 49
and the third groove 50.

A fourth groove 51 and a fifth groove 52 perpendicular to these grooves are formed by cutting. As shown in the figure, the first groove 48 is on the recording/reproducing core forming portion 43.

The second groove 49 is formed on the separator 41, and the third groove 5.degree. is formed on the erasing core forming portion 44 so as to penetrate from one end surface to the other end surface. Also, the fourth
11151 and the fifth groove 52.

It is formed so as to penetrate from one end surface to the other end surface from the recording/reproducing core forming portion 43 to the separator 41 and the erasing core forming portion 44 .

Groove depth 121 of the first groove 48 and the second groove 49 (see Figure 6)
is almost equal to the height of the recording/reproducing coil 37 as shown in FIG.
The groove depth λ3 (see Fig. 6) is the recording/reproducing coil 37.
It is designed to be approximately equal to the sum of the height of the erasing coil 39 and the height of the erasing coil 39.

Further, the thickness Q2 of the groove bottom 47 shown in No. 5rA is designed to be slightly smaller than the groove depth 21 of the second groove 49 described above.
Second: By forming the flt 49, it is ensured that it reaches the separator 41. With such a dimensional design, the recording/reproducing core 38 and the erasing core 40 can be magnetically separated reliably by forming the second i#49.

Note that since the recording/reproducing core 38 and the erasing core 40 are connected via the separator 41, even if the second groove 49 is formed on the separator 41, they will not be separated. .

The three first grooves 48. No. 2449. the third groove 50;
The fourth groove of the book 51. By forming the fifth groove 52 in a crossed manner, each part such as the first order can be made at the same time.

That is, a recording/reproducing central leg 53 and an erasing central leg 54 are erected approximately at the center of the core assembly 26 with an interval corresponding to the thickness of the separator 41 . Coil storage recesses into which coils 37 and 39 are inserted are formed around the recording/reproducing central leg 53 and the erasing central leg 54. Further, side end legs 55 for recording and reproducing are formed on both sides of the central leg 53 for recording and reproducing, and side end leg parts 56 for erasing are formed on both sides of the central leg 54 for erasing. Further, VqIIll of the core assembly 26 has a support leg 5 having a relatively large area.
7 are provided respectively.

The recording/reproducing coil 37 and the erasing coil 39 are formed into a cylindrical shape using self-bonding wire. As shown in FIG. 2, the erasing coil 39 is first fitted onto the erasing central leg portion 54.

Next, the recording/reproducing coil 37 is fitted onto the recording/reproducing central leg 53 . Therefore, the recording/reproducing coil 37 and the erasing coil 39 partially overlap on the separator 41, so that the recording/reproducing central leg 53 and the erasing central leg 54 overlap.
In other words, the distance between the recording/reproducing magnetic thin film 27 and the erasing magnetic thin film 29 is made as small as possible. I can do two things. Recording/reproducing coil 37 and erasing coil 39
The ends of the core assembly 26 are pulled out from any one of the first grooves 48 to the fifth grooves 52 of the core assembly 26 through the grooves to the outer periphery of the core assembly 26, and if necessary, an adhesive is poured into the grooves to form a recording/reproducing coil. 37. The erasing coil 39 or the ends of these coils are fixed to prevent disconnection.

In this way, the core assembly 26 is constructed, on which the thin film support member 25 described above is placed, and as shown in FIG. The end opposite to the sliding contact end comes into contact with the upper surfaces of the recording/reproducing central leg 53 and the erasing central leg 54, and is magnetically connected to each other. Therefore, the width of the erasing central leg 54 (recording/reproducing central leg 53) is designed to be such that the two erasing magnetic thin films 29 can come into complete contact with each other.

After placing and aligning the thin film support member 25 on the core assembly 26, adhesive 58 is applied over both sides as shown in FIG.

The thin film support member 25 and the core assembly 26 are joined together. Note that this adhesive 58 is applied to the first
It may also be poured into appropriate grooves of FR48 to FR5152 to adhere to the thin film support member 25.

The aforementioned auxiliary magnetic pole block 22 (see FIGS. 1 and 2) is used to improve recording/reproducing and erasing efficiency. The auxiliary magnetic pole block 22 is composed of a core block 59 made of ferrite, sendust, or the like and having approximately the same size as the core assembly 26, and a wear-resistant layer 60 provided on the side of the core block 59 that is in sliding contact with the magnetic recording medium 23. has been done. Like the thin film support member 25, this wear-resistant layer 60 is made of carbon composite material, ceramics, glass, non-magnetic ferrite, etc., and carbon composite material is especially suitable.

A disk-shaped or tape-shaped magnetic recording medium 23 running while being sandwiched between the auxiliary magnetic pole block 22 and the main magnetic pole block 21 has a base film 61 and a soft magnetic layer 62 as shown in FIG. , Tari I1. The recording layer 63 having magnetic anisotropy is formed in a laminated state.

As shown in FIG. 2, the auxiliary magnetic pole block 22 is.

Magnetic 'a' film 27 for recording and reproduction of main magnetic pole block 21 Magnetic thin film 29 for erasing. The recording/reproducing side end leg 55 faces the erasing side leg 56 and the like to form a closed magnetic path during recording/reproducing or erasing.

FIGS. 7, 8, and fXS9 are perspective views showing modified examples of the core assembly 26. FIG. These modified examples are designed to avoid the magnetic influence caused by the proximity of the recording/reproducing core 38 and the erasing core 40 to each other. That is, in the case of FIG. 7, the recording and reproducing Furukawa core 3
An inclined notch 64 that gradually widens outward is formed on the side facing the separator 41 of No. 8, and the separator 41 made of a non-magnetic material is filled up to the notch 64.

In the case of FIG. 8, sloped notches 64 that gradually widen toward the outside are formed on the sides of both the recording/reproducing core 38 and the erasing core 40 facing the separator 41. A separator 41 made of a non-magnetic material is filled up to .

In the case of FIG. 9, a horizontal notch 64 is formed at the bottom of the recording/reproducing core 38, and the separator 41 made of a non-magnetic material is filled up to the notch 64.

As shown in these modified examples, by providing the recording/reproducing core 38 or (and) the erasing core 40 with a notch 64', it is possible to avoid the negative magnetic influence of the two. However, if the notch 64 is made too large, Then, areas with high magnetic resistance are formed partially in the recording/reproducing core 38 or (and) /lv recording core 4 +), so the core 38.40
It is necessary to determine the size of the notch 64 while taking into consideration the magnetic properties of the notch.

FIG. 10 is a diagram illustrating a modification of the method for manufacturing the core assembly 26. In this variant case.

The recording and reproducing core block 65 that produces the recording and reproducing core 38, the separator 41, and the erasing core block 66 that produces the erasing core 40 are bonded by glass bonding, etc., with the separator 41 in between, as shown in the figure. be joined together by means of

Next, in this aggregate, three tg48, second
Groove 49, third groove 50, and two fourth grooves 51. Fifth
The grooves 52 are formed so as to cross each other, and then a recording/reproducing coil 37 and an erasing coil 39 are attached to form the core assembly 26.

Figure 11 is recorded on both sides! Magnetic recording medium 2 having 63
FIG. 3 is a longitudinal cross-sectional view showing the side of a magnetic head suitable for using No. 3;

In this example, the auxiliary magnetic pole block 22 is unnecessary.

Instead, the core portion of the other magnetic head that faces the magnetic recording medium 23 functions as an auxiliary magnetic pole (image core). 29), the recording/reproducing central leg section s3 ('4! 23
The predetermined intervals are shifted to opposite positions along the direction perpendicular to the running direction of the vehicle. Therefore, the recording and reproducing magnetic thin film 27 (erasing magnetic thin film 29) faces the recording and reproducing side end leg 55 (erasing side end leg 56) of the other magnetic head, and the recording and reproducing side end leg 55 ( The erasing side end legs 56) serve as image cores.

Incidentally, since the manufacturing method of the magnetic head is the same as described above, the explanation thereof will be omitted.

〔Effect of the invention〕

As described above, the present invention includes an assembly in which a recording/reproducing core element body and an erasing core element body are connected together with a separator element intervening therebetween, and three grooves and a cross section between these elements are provided. By forming two grooves, the first leg for recording and reproduction and the second leg for recording and reproduction.

The first erasing leg, the second erasing leg, the recording/reproducing coil accommodating recess, and the erasing coil accommodating recess are formed at the same time. Further, winding of the coil is performed simply by fitting the cylindrical coil into the i2 recording/reproducing first leg and the erasing first leg.

For this reason, compared to conventional magnetic head manufacturing methods, it is easier to ensure processing accuracy, the process can be simplified, and it is possible to provide a magnetic head for perpendicular magnetic recording that is suitable for mass production.

[Brief explanation of the drawing]

t(i!I to 11rJ!i) are for explaining the magnetic head according to the embodiment of the present invention, FIG. 1 is an exploded perspective view of the magnetic head, and FIG. 2 is a use of the magnetic head. 3 is an enlarged sectional view of the thin film support member in this magnetic head, and FIG. 4 is a plan view of the core assembly in the second magnetic head. FIGS. 5 and 6 are the core assembly. FIGS. 7, 8, and 91?I are perspective views showing modified examples of the core assembly, and FIG. 10 is a perspective view showing an example of a manufacturing method for a magnetic head. 11 is a vertical sectional view showing another example of a magnetic head; FIGS. 12(a) and 12(b) are perspective views showing the structure of a conventional perpendicular magnetic recording head; FIG. The figure is a plan view showing the positional relationship between the magnetic thin film for recording and reproduction and the magnetic thin film for erasing. 21...Main magnetic pole block, 22...Auxiliary magnetic pole block, 23...・Magnetic recording medium, 25...
... Thin film support member, 26 ... Core assembly,
27...Magnetic thin film for recording and reproduction, 29...
-Magnetic thin film for erasing, 37... Coil for recording/reproduction, 38... Core for recording/reproduction. 39... Erasing coil, 40... Erasing core. 41...Separator 242...Core element, 43...Core forming portion for recording and reproduction, 44...
...Erasing core forming part, 45...Separator forming part, 46...M groove, 47...
...Groove bottom, 48...First groove, 49...
・Second groove, 50...NS3 groove, 51...
・Fourth groove, 52...Fifth groove, 53...
Central leg for recording and playback. 54.../Iff central leg, 55...
...First leg for recording/reproduction, 5G...Side end leg for erasing 58...Adhesive. Figure 2 Figure 3 Figure 6 Figure 7 e? Figure 8 qυ Figure 9 Figure 70 Figure 1/Figure 72 and σ Figure 13

Claims (1)

[Scope of Claims] A thin film support member made of a non-magnetic material that supports a recording/reproducing magnetic thin film and an erasing magnetic thin film disposed in a direction perpendicular to the recording surface of a magnetic recording medium so as to be separated from each other; A first leg for recording and reproducing that is in contact with the end of the magnetic thin film on the side that does not come into sliding contact with the magnetic recording medium and winding a coil for recording and reproducing, and a recording and reproducing arm that is arranged in parallel with the first leg for recording and reproducing. a recording/reproducing core having a second leg for erasing; a first leg for erasing around which an erasing coil is wound in contact with the end of the erasing magnetic thin film on the side that does not come into sliding contact with the magnetic recording medium; 1st for erasing
A core assembly comprising an erasing core having a second erasing leg in parallel with the leg, and a separator made of a non-magnetic material interposed between the recording/reproducing core and the erasing core. In the magnetic head for perpendicular magnetic recording, which is formed by integrally joining the above, the recording/reproducing core element and the erasing core element are integrally connected with a separator element interposed therebetween. A first groove, a second groove, and a third groove are formed at predetermined intervals in this aggregate so that the second groove in the middle is disposed on the separator, and is substantially parallel to the separator. By forming the fourth groove and the fifth groove at a predetermined interval so as to be substantially orthogonal to the groove, the first leg for recording and reproduction and the second leg for recording and reproduction are formed on the recording and reproduction core. At the same time, a recording/reproducing coil storage recess is formed around the first recording/reproducing leg, and the first erasing leg and the second erasing leg are placed on the erasing core.
The legs are erected and an erasing coil storage recess is formed around the first erasing leg, so that the cylindrical recording/reproducing coil and the erasing coil can be inserted into the first recording/reproducing leg. and a method for manufacturing a magnetic head for perpendicular magnetic recording, characterized in that the head is fitted into a first leg for erasing.