JP2000113439A - Manufacture of composite magnetic head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide such a manufacture of a magnetic head that increases the parallelism of each gap for the first and the second magnetic head and that also increases recording density. SOLUTION: With a core precursor 63... fitted in an inserting groove 53..., and with the base part 64 fitted in a notch 54, a nonmagnetic block 71 and a magnetic block 61 are joined to form a composite block 73; the composite block 73 is divided to form a first and a second half block 81, 82. Then, with a gap layer 90 formed on the divided face 83, 84 of at least one of the half blocks 81, 82, the first and the second half block 81, 82 are joined to form a slider precursor 91 that is equipped with plural second magnetic heads 32..., forming a slider 34 by dividing the slider precursor 91 in the longitudinal direction; and the first magnetic head 33 is attached to the side wall of the slider 34.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a method of manufacturing a composite magnetic head capable of recording and reproducing data on and from a magnetic recording medium at high density.

[0002]

2. Description of the Related Art Recently, a composite magnetic head for performing magnetic recording on a flexible magnetic recording medium has been developed. This composite type magnetic head has a second magnetic head operating in a non-contact state with a magnetic recording medium and a first magnetic head operating in a state of contact with a magnetic recording medium attached to a slider. Things. As the first magnetic head, for example, a sliding magnetic head having a large track width can be exemplified, and as the second magnetic head, for example, a floating magnetic head having a small track width can be exemplified. In a magnetic recording system having this composite magnetic head, compatibility with a conventional floppy disk is ensured by the first magnetic head, and high-density magnetic recording and reproduction can be performed by the second magnetic head. Has become. In order to realize high-density magnetic recording while maintaining compatibility with a floppy disk, it is necessary to arrange the gap of the second magnetic head and the gap of the first magnetic head in parallel with each other.

Here, a method of manufacturing a conventional composite magnetic head will be described with reference to FIG. First, by joining the half cores 11 and 12 made of a magnetic material with a gap layer (not shown) interposed therebetween, a low melting point glass 16 having a joint reinforcing hole 19 and a winding hole 13 and defining a gap width is embedded. A second magnetic head 1 is manufactured. Also,
The block 2 is formed on one surface 21 of the block 2 made of a non-magnetic material.
Are formed along the longitudinal direction of the block 2, and the winding grooves 23 extending in the longitudinal direction of the block 2 and communicating with the respective insert grooves 22 are formed on one surface 21. Thus, the slider block 24 is manufactured. next,
The second magnetic heads 1 are inserted into the respective insertion grooves 22 of the slider block 24 so that the winding holes 13 of the second magnetic heads 1 and the positions of the winding grooves 23 of the slider block 24 match. By inserting, the slider precursor 3 is manufactured. next,
The slider precursor 3 is cut into the slider 6 at equal intervals in the longitudinal direction, and the upper surface 6a and the lower surface 6b of the slider 6 are polished to adjust the gap depth of the second magnetic head 1.
Next, the first magnetic head 4 is mounted on the side wall surface of the slider 6 and wound in the winding hole 13 of the second magnetic head 1, and the medium facing surface of each of the magnetic heads 1 and 4 is formed into a predetermined shape. do it,
The composite magnetic head 5 is manufactured.

[0004]

However, in the conventional method of manufacturing a composite magnetic head, the slider block 2
Since the second magnetic heads 1 are separately inserted into the fourth insertion grooves 22, the parallelism of the gaps of the second magnetic heads 1 is slightly shifted, and all the second magnetic heads 1 are shifted. 1
Are difficult to attach to the slider block 24 while keeping the gaps parallel to each other. When the first magnetic head 4 is attached to the slider 6 obtained by cutting out the slider precursor 3, the second There is a problem that it is difficult to make the gap of the magnetic head 1 parallel to the gap of the first magnetic head.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and is a composite type capable of increasing the parallelism between the gap of the second magnetic head and the gap of the first magnetic head and increasing the recording density. An object of the present invention is to provide a method for manufacturing a magnetic head.

[0006]

In order to achieve the above object, the present invention employs the following constitution. The method of manufacturing a composite magnetic head according to the present invention includes the steps of: manufacturing a composite magnetic head in which a first magnetic head and a second magnetic head are supported by a support; Forming at least one or more insertion grooves to form a non-magnetic block, and forming a magnetic block made of a magnetic material having at least one or more protruding core precursors that can be fitted into the insertion grooves; By joining the non-magnetic material block and the magnetic material block to form a composite block while fitting the core precursor into the insertion groove, by dividing the composite block so as to divide the core precursor into two parts Forming a first half block and a second half block each having a divided surface on which a half core precursor obtained by dividing the core precursor into two is formed, and By forming a winding groove on at least one of the divided surfaces and forming a gap layer, and joining the first and second half blocks with the divided surfaces facing each other, a winding hole formed by the winding groove is formed. Are formed from a side surface, and a slider precursor is formed by forming at least one or more second magnetic heads in which the gap layer is sandwiched between the pair of half-core precursors. , A slider including one second magnetic head is formed, and the first magnetic head is attached to a side wall surface of the slider.

A method of manufacturing a composite magnetic head according to the present invention is the method of manufacturing a composite magnetic head described above, wherein a pair of the half-core precursors is sandwiched on the upper surface of the slider precursor. A groove is formed along the longitudinal direction of the half core precursor, and the pair of grooves is filled with non-magnetic glass.

Further, a method of manufacturing a composite magnetic head according to the present invention is the method of manufacturing a composite magnetic head described above, wherein the upper surface of the slider precursor is ground to form the upper surface and the winding hole. The gap depth of the second magnetic head is adjusted by adjusting the gap of the second magnetic head.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail.
As shown in FIGS. 1 to 4, a composite magnetic head 31 according to the present invention includes a second magnetic head 32, a first magnetic head 33, and a slider 34 (support) made of a nonmagnetic material. It is configured. The slider 34 has a medium facing surface 55
And an air bearing portion 35 for holding the second magnetic head 32, and a first
And a connecting portion 57 for holding the magnetic head 33. The first magnetic head 33 is adhered to the connection portion 57 of the slider 34 via an adhesive glass or the like. As the first magnetic head, for example, a sliding magnetic head having a large track width can be exemplified, and as the second magnetic head, for example,
A floating magnetic head having a small track width can be exemplified.

As shown in FIGS. 1 to 4 and FIGS. 8 to 10, the second magnetic head 32 is held at one end of an air bearing portion 35 of a slider 34, and cores 36, 37 made of a magnetic material. When composed of the gap G ₃ Metropolitan that provided on the abutting faces of the core 36, 37 is exposed from the medium facing surface 55. Further, the bearing surface 55 is formed track width regulating grooves 38, 38 for restricting the track width of the gap G _3, the track width control grooves 38, 38 is filled with non-magnetic glass 39 and 39 I have. Further, a winding hole 40 is provided on a side wall surface of the air bearing portion 35.

As shown in FIGS. 8 to 10, the cores 36 and 37 of the second magnetic head 32 are embedded in the air bearing 35, and the winding hole 40 is defined by the cores 36 and 37. , Can be wound around the core 36 through the winding hole 40. The cores 36 and 37 are provided with the winding holes 4.
0 is formed in a substantially ring shape so as to surround 0. In the gap G _3, by a gap layer (not shown) into two magnetic films (not shown) is sandwiched between these gap layer and the magnetic film is sandwiched between the core 36 and 37. The gap layer is made of a non-magnetic material, for example, SiO ₂ , Al ₂ O
₃ , CrSiO ₂ or the like is used. The magnetic film is made of a soft magnetic alloy having a higher magnetic permeability than the cores 36 and 37. For example, when the cores 36 and 37 are made of ferrite, the magnetic film is made of an Fe— (Ta, Hf) —C-based material. alloy,
An Fe-Si-Al alloy, an Fe-Ni alloy, an amorphous alloy, or the like is used.

As shown in FIGS. 1 to 4 and FIGS. 5 to 7, the first magnetic head 33 includes a recording / reproducing magnetic head 41.
The recording / reproducing magnetic head 41 includes a recording / reproducing magnetic core 43 and a shared magnetic core 44 made of a magnetic material.
It is formed on the abutting surface 44 consisting of the gap G ₄ Metropolitan exposed from the medium facing surface 47. The medium facing surface 47 has grooves 45, ₄ for regulating the track width of the gap G4.
5 are formed, and the non-magnetic glass 46,
46 are filled. Also, the recording / reproducing magnetic core 43
And the shared magnetic core 44 are joined by a joining reinforcing glass 48 provided on the opposite side of the medium facing surface 47.

The erasing magnetic head 42 is formed on an abutting surface of the erasing magnetic core 49 and the common magnetic core 44 made of a magnetic material, and the magnetic cores 49 and 44.
Consisting of gap G _5, G ₅ Metropolitan exposed from. Medium facing surface 47, a groove 50 for regulating the width of each gap G _5, G _5,
50 and 51 are provided, and the grooves 50, 50 and 51 are filled with non-magnetic glass 52, 52 and 53. Gap G
_5, G ₅ is divided by the groove 51 (non-magnetic glass 53), the width of the groove 51 is slightly smaller to or width of the gap G ₄ and substantially equal than the width of the gap G _4. The erasing magnetic core 49 and the shared magnetic core 44 are
They are joined by a joining reinforcing glass 48 provided on the opposite side of the medium facing surface 47. Further, the first magnetic head 3
A back core 5 magnetically couples the recording / reproducing magnetic core 43, the shared magnetic core 44, and the erasing magnetic core 49.
8 is provided so as to bridge these magnetic cores 43, 44, 49.

Next, a method of manufacturing the composite magnetic head 31 will be described with reference to FIGS. First, in FIG. 11, a rectangular block 51 made of a nonmagnetic material is used.
Then, a rectangular parallelepiped block 61 made of a magnetic material is prepared. Next, a plurality of insertion grooves 5 are formed in the side wall surface 52 of the block 51.
3 are formed. It is preferable that the insertion grooves 53 are formed at predetermined intervals along the longitudinal direction of the block 51 and are formed so as to extend in the lateral direction of the block 51. Also, each of the insertion grooves 53.
It is preferable that the inner side wall surface and the side wall surface 52 of the block 51 are formed to be perpendicular to each other.

Further, a notch 54 is formed in the side wall surface 52 of the block 51. The notch 54 is formed at a joint portion 5 between the side wall surface 52 of the block 51 and the bottom surface 50 in contact with the side wall surface 52.
2a is formed by cutting out the block 51a.
Are preferably formed so as to extend in the longitudinal direction of the groove and communicate with the respective insertion grooves 53. Notch 54 is preferably lacks cut to substantially the same depth as the insertion grooves 53 ... of depth h ₂ from the side wall surface 52. In addition, the notch 54
It is preferable that the lack of cut from the bottom surface 50 to a depth h _7.
By processing the block 51 in this way, the non-magnetic block 7
Form one.

Further, by cutting one surface 62 of the block 61 to form a plurality of projecting core precursors 63..., A base 64 and a plurality of core precursors 63 vertically projecting from one surface 65 of the base 64 are formed. Are formed. The width h _{1 of the} block 61 is
3 depth (depth from the side wall surface 52 of the notch 54) is preferably set to equal to h _2. In addition, the core precursor 63 ...
Are preferably formed in conformity with the shapes of the insertion grooves 53 of the non-magnetic block 71. In particular, each of the core precursors 63.
Are equivalent to the intervals of the insertion grooves 53.
3 ... the height h ₃ insertion grooves 53 ... and equal to the length h ₄ of the width h ₅ (block 61 of the core precursor 63 ... of the block 61
Width h ₆ longitudinal direction parallel to the width) of the insertion groove 53 ... of
It is preferable to make it equal to. The thickness h of the base 64
₈ is preferably equal to the depth h ₇ of the cutout 54. The core precursors 63 of the magnetic block 66 formed in this manner are inserted into the insertion grooves 53 of the nonmagnetic block 71.
, And the base portion 64 can be fitted into the cutout portion 54.

Next, the plurality of core precursors 63 are fitted into the plurality of insertion grooves 53 and the base 64 is fitted into the notch 54, so that the nonmagnetic block 71 and the magnetic block 7 are fitted.
The composite block 73 is formed by joining the two. Since the core precursors 63 and the insertion grooves 53 and the bases 64 and the notches 54 can be fitted to each other as described above, the non-magnetic block 71 and the magnetic block 72
They adhere to each other with almost no gap. Therefore, the composite block 7
3 has a substantially rectangular parallelepiped shape and a shape substantially equal to that of the block 51. The top surface 63a of the core precursor 63 is exposed on one surface 74 of the composite block 73.
3 is provided on the side wall surface 67 of the magnetic block 66.
Is exposed.

Next, in FIG. 12, the composite block 73 is divided into a first half block 81 and a second half block 82. The composite block 73 is a composite block 73
It is preferable to divide the non-magnetic material block 66 incorporated in the device into two parts along the longitudinal direction. That is, the first half block 81 and the second half block 8
The composite block 73 is divided so that each of the divided surfaces 83 and 84 is parallel to the side wall surface 75 of the composite block 73. In this way, the composite block 73 is divided and the magnetic material block 66 is divided into two, so that the core precursor 6
Are divided to form a half-core precursor 63b and a half-core precursor 63c, the half-core precursor 63b is exposed from the division surface 83 of the first half block 81, and the half-core precursor 63c is divided by the division surface of the second half block 82. Exposed from 84. The base 64 is also divided at the same time into base halves 64b and 64c.
The half block 81 is incorporated, and the base half 64c is
It is incorporated in the half block 82.

Next, winding grooves 85 and 86 and joining reinforcing grooves 87 and 88 are formed on the divided surfaces 83 and 84 of the first half block 81 and the second half block 82, respectively. The winding grooves 85, 86 are on one surface 7 more than the joint reinforcing grooves 87, 88.
4, formed near 74. When the first and second half blocks 81 and 82 are joined with the winding grooves 85 and 86 and the joining reinforcing grooves 87 and 88 so that the divided surfaces 83 and 84 face each other, the positions of the respective grooves are almost the same. It is preferable to form it. When forming the winding grooves 85 and 86 and the joining reinforcing grooves 87 and 88, the half-core precursor 63 embedded in the first and second half blocks 81 and 82 is used.
b and the half-core precursor 63c.
6 and the joining reinforcing grooves 87 and 88 so as not to be divided. That is, the half-core precursor 63b
... and the half-core precursors 63c are buried (the depths from the divided surfaces 83 and 84),
It is necessary to reduce the depths of 5, 86 and the joint reinforcing grooves 87, 88. Furthermore, the first and second half blocks 8
Magnetic films 89, 89 are formed on the divided surfaces 83, 84, the winding grooves 85, 86, and the joint reinforcing grooves 87, 88 of the first and the second 82, respectively. Gap layers 90, 90 are laminated. Gap layer 9
0 may be formed in only one of the first and second half blocks 81 and 82.

Next, a slider precursor 91 is formed by filling the bonding non-magnetic glass 94 into the bonding reinforcing grooves 87 and 88 and bonding the first half block 81 and the second half block 82 together. At this time, the winding grooves 85 and 86 and the joining reinforcing grooves 87 and 88 are integrated, respectively,
The winding hole 40 and the joint reinforcing hole 93 are formed so as to extend from the side wall surface of the slider precursor 91 in the longitudinal direction of the slider precursor 91. Also, the half-core precursor 63b ...
Are exposed from the inner peripheral surfaces of the winding hole 40 and the joint reinforcing hole 93, and the gap layer 90 is
0 is exposed from the upper inner peripheral surface 40a. Division surface 83, 84
The gap layers 90 formed on the first and second half blocks 81 and 82, respectively,
90 are joined together. In this way, the half-core precursors 63b and the half-core precursors 63c are abutted with the gap layer 90 and the two magnetic films 89 and 89 therebetween, forming the cores 36 and 37 of the second magnetic head 32. and, abutting surfaces of the cores 36, 37 is a gap G ₃ of the second magnetic head 32.

Next, in FIG. 13, by grinding one surface 96 of the gap G ₃ is exposed, Makisen'ana 40 and one side 96
By adjusting the distance between, for adjusting the gap depth G _d of gap G _3. Gap layer 90, since the exposed upper inner peripheral surface 40a of the one surface 96 and Makisen'ana 40, gap depth G _d is the same as the distance between the one surface 96 and Makisen'ana 40. Since Makisen'ana 40 is exposed from the side wall surface of the slider precursor 91, it is possible to adjust the gap depth G _d while checking from time to time the interval between Makisen'ana 40 and one face 96. Further, by grinding the other surface 97 facing the one surface 96, the base 64 (base halves 64b, 64c) is scraped, and the joining reinforcing hole 93 is scraped to expose the joining glass 94. Thus, the base 64 (base half 64)
b, 64c), the plurality of cores 3 connected by the base 64 (base halves 64b, 64c).
, 37 ... are divided into individual magnetic heads.

Next, on one surface 96 of the slider precursor 91,
The cores 36, 37 (half-core precursors 63b, 63)
c ...) across the forming a pair of track width regulating grooves 38, 38 for regulating the track width of the gap G _3. The track width regulating grooves 38, 38 extend along the longitudinal direction of the cores 36, 37 exposed from the one surface 96 and at least the core 3
The cores 36 and 37 are formed so that the width of the cores 36 and 37 is reduced by grinding a part of the cores 6 and 37. In this way, by grinding a part of the cores 36, 37 to form the track width regulating grooves 38, 38, the cross-sectional shape of the cores 36, 37 is
5 has a substantially convex shape. Further, the track width regulating grooves 38, 38 are filled with non-magnetic glass 39. The non-magnetic glass 39 is applied so as to fill the track width regulating grooves 38 and 38 in a molten state and further overflow onto one surface 96 of the slider precursor 91.

Next, in FIG. 14, the non-magnetic glass 39 overflowing on one surface 96 is removed. Further, by grinding one surface 96 of the slider precursor 91 while leaving the periphery of the cores 36, 37 and the track width regulating grooves 38, 38, the air bearing portions 35 and the connection portions 57 are formed. A medium facing surface 55 is formed in the air bearing portion 35, and the cores 36 and 37 and the track width regulating groove 3 are formed from the medium facing surface 55.
Nonmagnetic glass 39, 39 and the gap G ₃ embedded exposed to 8, 38. Also, the slider precursor 91
The winding groove 56 is formed on the side wall surface 96 along the longitudinal direction of the slider precursor 91.

Next, the slider 34 is formed by dividing the slider precursor 91 at the boundary between the air bearing portion 35 and the connecting portion 57 and cutting off the end 100 of the connecting portion 57. The slider 34 is composed of an air bearing portion 35 made of a nonmagnetic material connection portion 57, the air bearing portion 35, a second core 36, 37 made of a magnetic material formed by butted through the gap G ₃ A magnetic head 32 is embedded. Next, the first magnetic head 33 is attached to the connection portion 57 of the slider 34 via an adhesive glass, and the medium facing surfaces 47, 5
By lapping 4 and forming it into a predetermined shape,
A composite magnetic head 31 as shown in FIGS. 1 to 4 is manufactured.

In the method of manufacturing the composite magnetic head 31, the slider precursor 91 having the plurality of second magnetic heads is formed, and the slider 34 (support) is formed by dividing the slider precursor 91. First magnetic head 33
Is attached, a large number of composite magnetic heads 31 can be obtained from one slider precursor 91, and the productivity of the composite magnetic head 31 can be increased.

In the above-described method for manufacturing the composite magnetic head 31, the core precursors 63 connected by the base 64 are inserted into the plurality of insertion grooves 53, so that the second magnetic heads 32 obtained are obtained. Can be formed in the slider precursor 91 in parallel with each other, and the slider ₃ is formed by dividing the slider precursor 91.
4, the first magnetic head 33 is attached to the gap G _{3 of} the second magnetic head 32 and the first magnetic head 33.
Gaps G ₄ , G ₅ , G ₅ can be arranged in parallel. In the method of manufacturing the composite magnetic head 31 described above, since the composite block 73 is divided and the gap layer 90 is formed to simultaneously form the plurality of second magnetic heads 32, the productivity of the second magnetic head 32 is improved. And the quality of the second magnetic head 32 can be made constant.

In the above-described method of manufacturing the composite magnetic head 31, the winding grooves 85, 86 and the joint reinforcing grooves 8 are formed on the divided surfaces 83, 84 of the first and second half blocks 81, 82.
7 and 88 are formed and these blocks 81 and 82 are joined to form a slider precursor 91.
The winding hole 40 can be easily formed in the joint reinforcing groove 8.
The blocks 81 and 82 can be firmly joined by the joining glass embedded in the blocks 7 and 88.

[0028] In the method of manufacturing a composite magnetic head 31 described above, a pair of track width regulating groove for regulating the track width of the gap G ₃ across the half-core precursor 38
Because it forms a, it is possible to reduce the spacing of these grooves 38, 38 the length of the track width regulating grooves 38, 38 is shortened, the second magnetic head 32 to reduce the track width of the gap G ₃ Recording density can be increased.

[0029] In the method of manufacturing the composite magnetic head 31 described above, when adjusting the gap depth G _d of the second magnetic head 32 by polishing the one surface 96 of the slider precursor 91, one surface 96 since adjust while checking the distance between Makisen'ana 40, it is possible to accurately adjust the gap depth G _d.

[0030]

As described in detail above, in the method of manufacturing a composite magnetic head according to the present invention, the core precursors connected by the bases are inserted into the plurality of insertion grooves, respectively. The gaps of the two magnetic heads can be formed in the slider precursor in parallel with each other, and the first magnetic head is attached to a slider (support) obtained by dividing the slider precursor. The head gap and the gap of the first magnetic head can be arranged in parallel. In the method of manufacturing a composite magnetic head according to the present invention, a plurality of second magnetic heads each having a gap composed of a gap layer are formed simultaneously by dividing the composite block and forming a gap layer. And increase the productivity of magnetic heads
The quality of the magnetic head can be made constant.

In the method of manufacturing a composite magnetic head according to the present invention, a winding groove and a joining reinforcing groove are respectively formed on each divided surface of the first and second half blocks, and these blocks are joined to form a slider precursor. Therefore, the winding holes can be easily formed in the slider precursor, and these blocks can be firmly joined by the joining glass embedded in the joining reinforcing grooves.

In the method for manufacturing a composite magnetic head of the present invention, a pair of track width regulating grooves for regulating the track width of the gap with the half-core precursor interposed therebetween are formed.
The length of the track width regulating groove is shortened, and the interval between these grooves can be reduced, and the track width of the gap can be reduced to increase the recording density of the second magnetic head. In addition, since the track width regulating groove is formed after the half core precursor is abutted, alignment adjustment of the magnetic head core can be reliably performed.

In the method of manufacturing a composite magnetic head according to the present invention, when adjusting the gap depth of the second magnetic head by polishing one surface of the slider precursor, the gap between the one surface and the winding hole is adjusted. Therefore, the gap depth can be adjusted with high accuracy.

[Brief description of the drawings]

FIG. 1 is a perspective view of a composite magnetic head according to an embodiment of the present invention.

FIG. 2 is a plan view of a composite magnetic head according to an embodiment of the present invention.

FIG. 3 is a front view of a composite magnetic head according to an embodiment of the present invention.

FIG. 4 is a side view of the composite magnetic head according to the embodiment of the present invention.

FIG. 5 is a perspective view of a first magnetic head of the composite magnetic head according to the embodiment of the present invention;

FIG. 6 is a plan view of a first magnetic head of the composite magnetic head according to the embodiment of the present invention.

FIG. 7 is a front view of a first magnetic head of the composite magnetic head according to the embodiment of the present invention.

FIG. 8 is a plan view of a second magnetic head of the composite magnetic head according to the embodiment of the present invention.

FIG. 9 is a front view of a second magnetic head of the composite magnetic head according to the embodiment of the present invention.

FIG. 10 is a side view of a second magnetic head of the composite magnetic head according to the embodiment of the present invention.

FIG. 11 is a process chart showing a method for manufacturing a composite magnetic head according to an embodiment of the present invention.

FIG. 12 is a process chart showing a method of manufacturing the composite magnetic head according to the embodiment of the present invention.

FIG. 13 is a process chart showing a method of manufacturing a composite magnetic head according to an embodiment of the present invention.

FIG. 14 is a process chart showing a method of manufacturing the composite magnetic head according to the embodiment of the present invention.

FIG. 15 is a process chart showing a method for manufacturing a conventional composite magnetic head.

[Explanation of symbols]

31: Composite magnetic head, 32: Second magnetic head, 3
3. First magnetic head, 34 Slider (support), 5
0: other surface, 51, 61: block, 52: one surface, 52a
... Junction, 53 ... Insertion groove, 54 ... Notch, 63 ... Core precursor, 63a ... Top surface of core precursor, 63b, 63c ...
Half core precursor, 64 base, 65 base one surface, 6
6: magnetic block, 71: non-magnetic block thermocouple,
73: Composite block, 74: One side of composite block, 81
... first half block, 82 ... second half block, 8
3, 84: split surface, 90: gap layer, 91: slider precursor

Claims (3)

[Claims] When manufacturing a composite magnetic head in which a first magnetic head and a second magnetic head are supported by a support, at least one or more insertion grooves are formed in a block made of a nonmagnetic material. Forming a non-magnetic material block, and forming a magnetic material block made of a magnetic material having at least one or more protruding core precursors that can be fitted into the insertion groove; and forming the core precursor in the insertion groove. The non-magnetic material block and the magnetic material block are joined while being fitted to form a composite block, and the core precursor is divided into two parts by dividing the core precursor into two parts. A first half having a split surface from which the half-core precursors formed are respectively exposed;
Forming a half-block and a second half-block; forming a winding groove on at least one of the first and second half-block divided surfaces and forming a gap layer; By joining the two half blocks, at least one or more second magnetic heads in which the winding holes formed by the winding grooves are exposed from the side surfaces and the gap layer is sandwiched between the pair of half core precursors are formed. Forming a slider having one second magnetic head by dividing the slider precursor along its longitudinal direction, and forming the first slider on the side wall surface of the slider. A method for manufacturing a composite magnetic head, comprising: 2. The method according to claim 1, wherein a pair of grooves sandwiching the half-core precursor is formed along the longitudinal direction of the half-core precursor on the upper surface of the slider precursor, and the pair of grooves is filled with non-magnetic glass. The method for manufacturing a composite magnetic head according to claim 1. 3. The gap depth of the second magnetic head is adjusted by grinding an upper surface of the slider precursor and adjusting a distance between the upper surface and the winding hole. 3. The method for manufacturing a composite magnetic head according to claim 1 or 2.