JPS63188805A - Perpendicular magnetic recording and reproducing head and its manufacture - Google Patents

Abstract

PURPOSE:To provide a return path in the track width direction and to attain thin profile by adopting the constitution such that a main magnetic pole formed between an auxiliary magnetic pole black and a black in contact with a medium so as to be clipped by a supporting block and a clipping block. CONSTITUTION:The auxiliary magnetic pole block 1' has a nonmagnetic substance area 20 at both sides of a magnetic pole clipping part 3a having a narrower width than that of a nonmagnetic member 6' of the medium contact block 10' and a winding slot 11 is formed as an open form. Magnetic members 10'a, 10'b being a track broadwise direction return path are coupled to both sides of the member 6'. The supporting block 4'a is pressed into contact with the nonmagnetic member 6' and the clipping part 3a, includes the slot 11' and the main magnetic pole 3 is formed at the side face of the clip part 3a and the nonmagnetic member 6'. Thus, the magnetic members 10'a, 10'b being a return path in the track width direction are provided, the recording sensitivity is improved, the profile of the head is made thin and number of components is decreased.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a perpendicular magnetic recording/reproducing head suitable for a type in which a main magnetic pole and an auxiliary magnetic pole are integrally arranged on one side of a magnetic recording medium, and a method for manufacturing the same. Regarding.

[Summary of the Invention] A support block is constructed by joining a medium-contacting block and an auxiliary magnetic pole block, and the medium-contacting block has a magnetic material on both sides of a non-magnetic material that serves as a return path in the track width direction in the longitudinal direction. A main magnetic pole is formed on the side surface of the main magnetic pole holding portion of the auxiliary magnetic pole block and the non-magnetic material of the medium contacting block, and this main magnetic pole is formed by the support block and the adjacent holding block. The magnetic material of the main magnetic pole clamping part and the medium contacting block which are sandwiched and are closer to the medium than the part where the coil winding of the main pole clamping part is wound by the non-magnetic material region band of the auxiliary magnetic pole block. The present invention relates to a perpendicular magnetic recording/reproducing head that magnetically insulates the space between the magnetic recording and reproducing heads, and a method for manufacturing the same.

[Prior Art] FIG. 19 is a perspective view of a conventional perpendicular magnetic recording/reproducing head.

Auxiliary magnetic pole block la having an open coil winding window 2
, lb, a pair of support blocks 4, 4 is formed by bonding non-magnetic materials 6, 6 set to a required thickness from the medium contacting surface to the upper part of the support blocks 4, 4.
form. After forming a core chip by sandwiching the main magnetic pole 3 between the pair of support blocks 4, 4, and polishing the surface of the non-magnetic material 6.6 that contacts the medium into a spherical shape or the like,
A perpendicular magnetic recording/reproducing head is constructed by winding a coil around the coil winding window 2.

In the magnetic head configured as described above, a magnetic recording medium such as a magnetic disk or a magnetic tape moves in sliding contact or while maintaining a predetermined space in a contact area A centered on the main magnetic pole 3. When a recording signal is sent to the coil 5 and the main magnetic pole 3 is excited, a magnetic flux is generated in the main magnetic pole 3, and the magnetic layer of the perpendicular magnetic recording medium in the portion facing the upper end of the main magnetic pole 3 is magnetized in the perpendicular direction. do. That is, the magnetic flux generated from the main pole is transmitted from the magnetic layer of the recording medium to the soft magnetic layer of the recording medium to the magnetic layer to the air gap (return path section 1c below).

1d (distance from the surface of the upper non-magnetic material 6 to the medium) →
Non-magnetic material 6→the above-mentioned auxiliary magnetic pole block la.

A magnetic recording circuit is constructed in which the magnetic recording circuit returns to the main magnetic pole 3 via the return path portions 1c and ld of the magnetic pole block 1b and the main magnetic pole holding portions 1e and if of the auxiliary magnetic pole block. Further, during signal reproduction, a magnetic reproducing circuit is configured in which a signal current is output to the coil 5 in accordance with a recording signal recorded on the magnetic layer of the medium, contrary to the magnetic recording process.

In this type of head, the main factor determining the recording/reproducing sensitivity depends on the magnetic resistance of the magnetic recording/reproducing circuit. That is, the smaller the magnetic resistance, the better the recording and reproducing sensitivity.

[Problems to be Solved by the Invention] However, in the conventional perpendicular magnetic recording/reproducing head, as described above, the magnetic recording/reproducing circuit includes an air gap and a non-magnetic material 6, and the magnetic resistance is large. It has been difficult to improve recording and reproducing sensitivity.

In order to reduce the magnetic resistance, a magnetic head having a structure as shown in FIGS. 20 and 21 has also been proposed.

In FIG. 20, the same reference numerals are used for the same members as in FIG. 19, so redundant explanations will be omitted. A magnetic material (for example,
Magnetic blocks 10 made of (ferrite) are provided adjacent to each other, and thereby a magnetic recording/reproducing circuit is connected to the main magnetic pole 3 → the magnetic layer of the recording medium → the soft magnetic layer of the recording medium → the above magnetic layer → the magnetic block 10 → the auxiliary magnetic pole. block la.

1b→main magnetic pole 3.

By configuring the magnetic recording/reproducing circuit in this manner, the magnetic resistance is significantly reduced as described above, and the recording/reproducing efficiency is improved. Moreover, since the return path is made from the side separated from the inside of the recording track, even if the magnetic material contacts the medium as a contact area, there is no possibility that a pseudo gap will be created and output waveform distortion will occur.

The magnetic block 10 is provided with an opening 11 at a portion facing the coil winding window 2 of the support block 4.4,
The coil is wound and taken out through this opening 11.

Further, as is clear from FIG. 21, the opening 11 of the magnetic block 10 is made sufficiently large, and is larger than the part around which the coil winding 5 of the main pole sandwiching part of the auxiliary pole block la, ll) is wound. Portion B of the main pole sandwiching portion on the medium side
Since a gap A exists between the magnetic material block and the magnetic block, this gap is magnetically insulated. In addition, in Fig. 21, the dotted line indicates when the magnetic block is placed adjacent to the support block.
This figure hypothetically shows the position where the winding window of the magnetic material block and the lower edge of the non-magnetic material of the support block touch each other.

In the example shown in FIG. 20, a pair of symmetrical support blocks 4, 4 are used to sandwich the main magnetic pole 3, but instead of this, one is made of the above-mentioned support block and the other is made of a non-magnetic material. Alternatively, a return path portion 1 of the auxiliary magnetic pole blocks la, lb may be used.
c and ld may be deleted, and in either case, a magnetic recording/reproducing circuit similar to this example described above can be constructed and the same effects can be obtained.

However, in this case, when the magnetic material block 10 is placed adjacent to the support block 4, the auxiliary magnetic pole blocks la, lb
The main magnetic pole 3 is located on the side closer to the medium than the part where the main magnetic pole holding part 1e, the coil of if, is wound (the part B in FIG. 21).
Or the above-mentioned holding part 1e.

If 1f comes into direct contact with the magnetic block, for example, during signal recording, the magnetic flux generated by the coil 5 will be returned via the magnetic block 10 without passing through the medium, and during signal reproduction, the signal magnetic flux in the magnetic layer of the medium will pass through the coil. Since the original magnetic recording/reproducing circuit is not configured, it is necessary to magnetically insulate the part B and the magnetic block as shown in FIG. 21 above, for example. 22 and 23 have also been proposed in which a magnetic insulating means is interposed in place of the air gap shown in FIG. 21.

The insulating means is, for example, a magnetic block that faces the part B, that is, the part of the main pole sandwiching part of the auxiliary magnetic pole blocks la, lb that is closer to the recording medium than the part around which the coil winding 5 of the main pole sandwiching part is wound. Grooves 10a and 10b are formed in the portion 10, and these grooves are filled with a non-magnetic material such as glass.

Now, the problem in manufacturing the magnetic head described above is that in order to make the magnetic head thinner, each of the magnetic block 10 and the support block 4 must be made thinner, which makes manufacturing difficult. The above blocks are 3 or 2, such as 2 and 1 core chip or 1 magnetic block 10 and 1 core chip.
The number of parts is relatively large.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a perpendicular magnetic recording/reproducing head that has a return path in the track width direction, has an integral structure, and can be easily made thin, and a method for manufacturing the head, which makes the manufacturing process simple and efficient. is to provide.

"Means for Solving the Problems" In order to achieve the above object, the present invention provides a track width on both sides of a non-magnetic material as a medium-facing block, in place of the magnetic block and support block in the conventional magnetic head. A magnetic material is used as a return path in the direction, and the main pole clamping part and the medium pair are located closer to the medium than the part where the coil winding of the main pole clamping part is wound by the non-magnetic region band of the auxiliary pole block. The gist is that the contact block is magnetically insulated from the magnetic material.

[Function] By forming the magnetic head as described above, the magnetic recording/reproducing circuit is prevented from passing through an air gap or non-magnetic material with large magnetic resistance by using the magnetic material of the medium-contacting block described above. , magnetically short-circuited, it is possible to reduce the magnetic resistance, in other words, it is possible to increase the recording/reproducing sensitivity.

In addition, this magnetic head can be manufactured by cutting a support block bar consisting of a medium-contacting block bar and an auxiliary magnetic pole block bar, and a sandwiching block bar that holds the main magnetic pole. is easy, and manufacturing is also simple.

[Examples] The present invention will be described below with reference to examples shown in the drawings.
19 and 23, the same numerals as in FIG. 2 indicate the same members, and the difference from the one in FIG. Magnetic materials 10'a and 10'b which serve as return paths in the track width direction in the longitudinal direction on both sides of the magnetic material 6''.
The point is that what was once combined is used.

The auxiliary magnetic pole block 1' is a block made of a magnetic material, and a non-magnetic material such as glass is placed on both sides of the main magnetic pole holding part, which has a width narrower than the radius of the non-magnetic material 6' of the medium contacting block 10 at one longitudinal corner. It has a non-magnetic region 4jF 20 filled with a magnetic material, and the winding groove 11' is formed in an open shape, leaving the side end of the main pole holding part 3a and the non-magnetic region 1F20 adjacent thereto. There is.

Further, the support block 4'a is the medium contacting block 1.
The non-magnetic material 6' of 0' and the main magnetic pole clamping part 3a of the auxiliary magnetic pole block 1' are brought into contact with each other and are joined so as to enclose the winding 1111'.

Furthermore, the main magnetic pole 3 is connected to the main magnetic pole holding part 3 of the auxiliary magnetic pole block 1'.
a and the non-magnetic material 6' of the medium contacting block 10'. dummy, etc.).

Next, a method for manufacturing the above-mentioned perpendicular magnetic recording/reproducing head will be explained in order of each step.

Step (a): As shown in FIG. 3, grooves are formed in the magnetic block 30 with the groove dimensions described later, and as shown in FIG. 4, the grooves 31 formed are filled with a non-magnetic material 6' such as glass. Then, after cutting as shown in the broken line, angle processing is performed to form magnetic materials 10'a, 10'b and non-magnetic material 6, as shown in FIG.
A medium-contacting block bar 10'' is obtained in which the medium-contacting block bars 10'' are formed by alternately connecting the blocks 10'' to each other in a predetermined width in the longitudinal direction.

Step (b): As shown in FIG. 6, another magnetic block 4
0 with groove dimensions to be described later, and as shown in FIG.
The auxiliary magnetic pole block bar 1'' shown in FIG. 10 is obtained by cutting it as shown in the broken line, and then performing angle processing as shown in the broken line in FIG. 8 and winding groove processing as shown in the broken line in FIG. 9. .

In step (a), the pitch is such that the width t2 of the main pole sandwiching portion of the auxiliary magnetic pole block par 1'' and the width t□ of the non-magnetic material of the medium contacting block par 10'' come into contact at their respective center positions. It is necessary to process the grooves 41 and 31.

In addition, the width t of the width 112 and the width t of the main magnetic pole 3 shown in FIG.
It is desirable to have the following relationship with 3.

t□>tl * tz>j:+ Thus, auxiliary magnetic pole block par 1'' is magnetic block 4
A media contacting block par 1 is placed at equal intervals in one corner of the longitudinal direction of 0.
0''' non-magnetic material region q+y filled with non-magnetic material leaving the main pole sandwiching part 3a narrower than the width of the non-magnetic material 6'
20 are provided.

The winding groove 11'' is formed in an open shape, leaving the side end 45 of the main pole holding portion 3a and the non-magnetic region band 20 adjacent thereto.

Step (c): As shown in FIG. 10, the medium contacting block par 10'' and the auxiliary magnetic pole block par 1'' obtained in the above steps (a) and (b) are bonded with a bonding agent such as glass. The magnetic material 6' and the main pole holding part 3a are brought into contact with each other and are joined so as to enclose the winding groove 11', thereby obtaining a support block bar 4''.

Step (d): As shown in FIG. 11, mirror finishing is applied to the side surfaces of the non-magnetic material 6' of the medium contacting block par 10'' and the main magnetic pole holding part of the auxiliary magnetic pole block par 1'', and the required finish is applied by sputtering or the like. After the magnetic material is deposited to a certain thickness, the main magnetic pole 3 is formed to have a specified width by etching or the like, as shown in FIG.

Note that instead of forming this main magnetic pole as described above,
The main pole 3 may be formed by direct sputter deposition using a mask or the like, and the width of the main pole 3 is regulated to a specified width by etching or a mask so as to correspond to the track width.

Step (E) 2 A holding block par 4''b made of a dummy of a non-magnetic material having the same structure or the same shape as the support block par 4''a described above is prepared, and as shown in FIG. 13,
The main magnetic pole 3 is connected to a support block par 4"a and a sandwiching block par 4"b adjacent thereto by bonding them at the same pitch using a bonding agent such as glass.
be held between the

Step (f): As shown in FIG. 14, the non-magnetic material region band 20 of the auxiliary magnetic pole block part 1" constituting the support block part 4"a and the magnetic material 10 of the medium contacting part 0.7 inch 10" are formed. The core chip shown in FIG. 15 is obtained by cutting along the cutting plane including 'a and 10'b, matching the pitch of each non-magnetic region band. If R surface processing is to be performed, it is performed before the above-mentioned cutting.

Note that the holding block 4'b does not necessarily have to have the same left-right symmetrical shape as the support block 4'a; for example, as shown in FIG. good.

Further, the non-magnetic material region band 23 may not necessarily be filled with a non-magnetic material and this portion may be left as a space 20'a, and a core chip having such a structure is shown in FIG.

Furthermore, the auxiliary magnetic pole block par 1'' in FIG.
As shown in the figure, the main pole sandwiching portion 3a is
May be replaced by

[Effects of the Invention] As is clear from the above explanation, the present invention is effective in reducing the thickness and number of parts of a perpendicular magnetic recording/reproducing head having a return path in the track width direction and having good recording/reproducing sensitivity. And its production is also simple.

[Brief explanation of the drawing]

1, 2, and 15 are perspective views showing one embodiment of the perpendicular magnetic recording/reproducing head of the present invention, and FIG. 16 and 1
7 is a perspective view showing another embodiment of the present invention, and FIGS. 3 to 14 and 18 are perspective views respectively illustrating each step in an embodiment of the method for manufacturing the head according to the present invention. 19 to 23 are perspective views of conventional perpendicular magnetic recording/reproducing heads. 10'...Medium contacting block, 10'a, 101b...Magnetic material, 6'...Nonmagnetic material, 1''...Auxiliary magnetic pole block, 20...Nonmagnetic material region band, 4 'a... Support block, 4'b... Clamping block, 3a... Main magnetic pole clamping part. Patent applicant Japan Broadcasting Association Sankyo Seiki Seisakusho Co., Ltd. Agent Patent attorney Nagai 1) Takezo Part ゛. Figure 1 Figure 2 Figure 7 10'a 6'4'b ♀1-1 ×1-1 .0

Claims (2)

[Claims] (1) A medium-contacting block in which magnetic materials are bonded in the longitudinal direction on both sides of a non-magnetic material, and a corner in the longitudinal direction of the block made of magnetic material whose width is narrower than the width of the non-magnetic material of the medium-contacting block. A non-magnetic material region band filled with a non-magnetic material is provided on both sides of the main magnetic pole sandwiching portion of the width, and the main magnetic pole sandwiching portion is formed in an open shape with the side ends of the main magnetic pole sandwiching portion and the non-magnetic material region band adjacent thereto remaining. and an auxiliary magnetic pole block provided with a winding groove, the non-magnetic material of the medium contacting block and the main pole holding part of the auxiliary magnetic pole block being in contact with each other and containing the winding groove. A support block is constructed by joining the
A main magnetic pole is formed on the side surface of the main magnetic pole holding portion of the auxiliary magnetic pole block and the non-magnetic material of the medium contacting block, and the main magnetic pole is held between the support block and the adjacent holding block. Features of this perpendicular magnetic recording/reproducing head. (2) Forming a medium-contacting block bar in which magnetic materials and non-magnetic materials are alternately bonded in the longitudinal direction to each predetermined width; After providing a non-magnetic region band filled with a non-magnetic material, leaving a main pole sandwiching part narrower than the width of the non-magnetic material of the opposing block bar, a side end of the main pole sandwiching part and the A step of forming an auxiliary magnetic pole block bar by forming a winding groove in an open shape while leaving the adjacent non-magnetic material region band; a step of forming a support block bar by bringing the holding parts into contact with each other and joining them so as to enclose the winding groove; A main magnetic pole is formed on the side surface of the contact block bar with the non-magnetic material, and the main magnetic pole is sandwiched between the support block bar and a clamping block bar adjacent thereto, and an auxiliary magnetic pole block bar forming the support block bar is formed. 1. A method of manufacturing a perpendicular magnetic recording/reproducing head, comprising the step of cutting along a cutting surface that includes a non-magnetic region band and a magnetic material of an opposing block bar.