JPH11149610A - Magnetic head device and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the magnetic head device and its manufacture by which desired size accuracy is attained and an excellent contact is obtained. SOLUTION: The magnetic head has a head section 10 which is made up of a combination of a 1st head chip that has a 1st rail 8a formed nearly in parallel with a driving direction of a recording disk medium and records and/or reproduces data in a 1st recording density while being in contact with a recording face of the recording disk medium and of a 2nd head chip 9 mounted with a 2nd magnetic head 22 that has a slider member having a 2nd rail 9a formed in parallel with the 1st rail 8a and records and/or reproduces data in a 2nd recording density higher than the 1st recording density while being floated from a signal recording face of the recording disk medium.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic head device for recording and / or reproducing data on a signal recording surface of a disk-shaped recording medium and a method of manufacturing the same.

[0002]

2. Description of the Related Art A disk drive for recording or reproducing data on or from a signal recording surface of a disk-shaped recording medium such as a flexible disk is widely used in personal computers, office computers, word processors, and the like, and its use has been remarkable. .

In recent years, a flexible disk having a large capacity of several tens of megabytes to several hundreds of megabytes has been proposed as compared with a commercially available flexible disk. For this reason, a removable large-capacity disk drive having a lower head chip capable of recording and reproducing at a conventional recording density of 1 MB or 2 MB and an upper head chip capable of high-density recording and reproducing has been provided.

For example, in a removable type head portion, two rails parallel to the medium sliding direction are formed on a medium sliding surface of a base such as a slider, and each rail has an upper head chip. And a lower head chip. The head having such a structure effectively uses an air film generated by a concave rail groove between an upper head chip and a lower head chip during recording and reproduction.

In general, the magnetic conversion characteristics of such a disk drive at the time of recording and reproduction are greatly affected by the relative positional relationship between the disk-shaped recording medium and the head chip, that is, the so-called "hit". Therefore, in order to keep the "round" good, the precision of the rail width and the positional precision between the center of the rail and the center positions of the upper and lower head chips (the center of the track width) are important.

[0006]

By the way, the rail width processing is performed by using a slicing machine or the like, and a total of three rail grooves are formed on the medium sliding surface by a grindstone, and further, a rail groove positioned outside each rail. Rail grooves are manufactured. The accuracy of the rail width and the like manufactured in this manner is determined by the feeding accuracy of the slicing machine. For example, it is possible to make the rail width tolerance ± 5 μm.

However, since the rail width processing is performed by attaching the head to the jig in units of several hundreds, the rails are affected by variations in the bonding and variations in the thickness of the side sliders, center sliders, etc. constituting the head. In some cases, it is difficult to make the width dimensional error or the error between the center of the track width of the upper head chip and the lower head chip and the center position of the rail width within ± 5 μm. By processing one head at a time, dimensional accuracy can be ensured, but the number of man-hours increases, which is not suitable for mass production.

Accordingly, the present invention has been made in view of the above-described circumstances, and has a high rail width accuracy.
The center of the track width of the upper head chip and the lower head chip coincides with the center of the rail width. It is an object to provide a magnetic head device that can be obtained and a method for manufacturing the same.

[0009]

In order to solve the above-mentioned problems, a magnetic head device according to the present invention has a first rail formed substantially parallel to a running direction of a disk-shaped recording medium, Recording and / or reproducing data at a first recording density while in contact with a recording surface of a recording medium
And a slider member having a second rail formed in parallel with the first rail and a second higher than the first recording density while floating above the signal recording surface of the disk-shaped recording medium. It is characterized by being joined to a second head chip on which a second magnetic head for recording and / or reproducing data at a recording density is mounted.

According to the magnetic head device of the present invention, since the magnetic head device is composed of the first head chip and the second head chip, the cost can be reduced and the head manufacturing time can be shortened. . Furthermore, according to the magnetic head device of the present invention, before joining the first head chip and the second head chip, each member is subjected to rail processing, so that each rail width and track The distance is formed with a desired dimensional accuracy, the center of the track coincides with the center of the rail width, and there is no variation among individuals. Thereby, a good "hit" can be obtained, that is, a good electromagnetic conversion characteristic can be obtained.

On the other hand, in order to solve the above-mentioned problems, a magnetic head device according to the present invention is a magnetic head device for recording and / or reproducing data at a first recording density in contact with a recording surface of a disk-shaped recording medium. Forming a first rail on one of the head chips in a direction substantially parallel to the running direction of the disk-shaped recording medium; and forming a second rail higher than the first recording density in a state of floating above the signal recording surface of the disk-shaped recording medium. Forming a second rail parallel to the first rail on a second head chip on which a second magnetic head for recording and / or reproducing data at a recording density is mounted on a slide member; Joining the first head chip portion and the second head chip portion.

According to the method of manufacturing a magnetic head device according to the present invention, the first head chip and the second head chip are each subjected to rail processing, and then the two members are joined. The rail width and the distance between tracks are formed with desired dimensional accuracy, the center of the track and the center of the rail width are matched, and there is no variation among individuals. Thereby, a good "hit" can be obtained, that is, a good electromagnetic conversion characteristic can be obtained.
Furthermore, the first head chip and the second head chip 2
Since it is only necessary to join the members, the number of processing steps is small, the cost can be reduced, and the head manufacturing time can be shortened.

[0013]

Embodiments of the present invention will be described with reference to the drawings. This embodiment is a magnetic head device that records and / or reproduces data on a signal recording surface of a disk-shaped recording medium such as a flexible disk.

As shown in FIG. 1, the magnetic head device according to the present embodiment includes a pair of support arms 1, a spacer member 2 mounted on each of the distal ends 1a of the pair of support arms 1, and A gimbal 3 is provided on each of the spacer members 2, and a head unit 4 attached to the gimbal 3. In this magnetic head device, a pair of support arms 1 are arranged such that a pair of head portions 4 face each other.

The magnetic head device performs recording and reproduction on a flexible disk 6 rotatably housed in a cartridge 5. At this time, the cartridge 5
Is formed with an opening 7 having an opening dimension sufficient for the magnetic head device to enter. Therefore, when performing recording and reproduction on the flexible disk 6 using this magnetic head device, as shown in FIG. 1, the pair of heads 4 enters from the opening 7 and the pair of heads 4 The disk 6 is inserted.

In this magnetic head device, as shown in FIGS. 2 to 6, the head section 4 includes a head chip section 10 formed by joining a first head chip 8 and a second head chip 9 to each other. Have. Further, the head portion 4 has a core forming member 11 on the surface of the head chip portion 10 opposite to the surface facing the flexible disk 6, and a first winding member 12 attached to the core forming member 11 and winding the coil 12A. And a second coil portion 13B for winding the coil portion 13A and the coil 12B.

The first head chip 8 has a first rail 8a formed in a direction substantially parallel to the traveling direction A of the flexible disk 6, and a first groove formed adjacent to the first rail 8a. 8b.

A magnetic head 20 (hereinafter referred to as a magnetic head) for writing and reproducing data at a first recording density in contact with the signal recording surface of the flexible disk 6 is provided near the center of the first rail 8a in the longitudinal direction. , Write / read head 20).
A magnetic head 21 for erasing (hereinafter, referred to as an erase head 21) is provided downstream of the medium sliding direction A.

The magnetic gap of the write / read head 20 and the magnetic gap of the erase head 21 are exposed on the upper surface of the first rail 8a. Then, the write / read head 20 performs recording on the flexible disk 6. Further, the erase head 21 regulates the track width of the recording track formed on the flexible disk 6 to a predetermined value by erasing a predetermined amount of both ends in the recording track width direction. This is a so-called tunnel erase head.

Before the first head chip 8 and the second head chip 9 are joined to each other, the first groove 8b formed in the first head chip portion is formed by the write / read head 20.
The center of the track width to match the center line O ₁ of the first rail 8a, is that formed by grinding or the like.

The second head chip 9 is made of a slider member made of a non-magnetic material, and is made of the first rail 8a.
A second rail 9a formed in parallel with the same width as the above, a second groove 9b formed adjacent to the second rail,
A rail groove 9c is provided adjacent to the second rail 9a and separates the first rail 8a and the second rail 9a.

On the downstream side of the second rail 9a in the medium sliding direction A, the second rail 9a, which is floating above the signal recording surface of the flexible disk 6, has a second signal density higher than the first signal density.
Magnetic head 2 for recording and reproducing data at a recording density of
2 is mounted.

The second head chip 9 is similar to the one shown in FIG.
As shown in FIG. 6, a notch 23 is formed to expose a part of the magnetic core of the second magnetic head 22 to the outside. A coil 12C for the second magnetic head is wound around the notch 23. The notch 2
3 is formed over the rail groove 9c and the second groove 9b. Then, the magnetic gap of the second magnetic head 22 is exposed on the upper surface of the second rail 9a.

The second magnetic head 22 has a magnetic gap capable of forming a recording track narrower than the write / read head 20 described above. For example, the second magnetic head 22 incorporates a so-called MIG head. is there.

The second groove 9b and the rail groove 9c formed in the second head chip 9 are provided in the second magnetic head 22.
The center of the track width, to coincide with the center line O ₂ in the width direction of the second rail 9b, is intended to be formed by grinding or the like before joining the first head chip 8.

The rail groove 9c of the second head chip 9
Is provided between the first rail 8a and the second rail 9a, a small height H ₁ of the rail groove 9c is than the height H ₃ of the height H ₂ and a second rail 9a of the first rail 8a It is formed so that The width W ₁ of the rail groove 9 c is obtained by subtracting the rail width W ₃ (= W ₄ ) from the track center distance W ₂ of the write / read head 20 and the second magnetic head 22. Head chip portion 1 having such a rail groove 9c
0 is formed in a concave shape as a whole.

Specifically, the heights H ₂ and H ₃ of the first rail 8a and the second rail 9a are formed to be, for example, 0.94 mm, and the first groove 8b, the second groove 9b, forming a height H ₁ of the groove 9c for example 0.8 mm. Further, the widths W ₄ and W ₃ of the first rail 8a and the second rail 9a are both set to, for example, 0.3 mm, and the width W _{1 of the} rail groove is set to, for example, 1.2 mm.

Further, front tapers 19c, 19c are formed on the first rail 8a and the second rail 9a on the leading end side of the flexible disk 6 as shown in FIG. Are formed on the forward end side. The front taper 19c is formed at an angle of about 0.5 ° with respect to the surface of the flexible disk 6, for example. The rear taper 19d is formed at an angle of about 10 ° with respect to the surface of the flexible disk 6.

As described above, the head chip unit 10 to which the present invention is applied is composed of the first head chip 8 on which the first rail 8a is formed in advance and the second head on which the second rail 9a is formed in advance. It is obtained by joining the chip 9.

On the other hand, the method of manufacturing a magnetic head device to which the present invention is applied includes a step of forming a groove in the first head chip 8 and a step of forming a groove in the second head chip 9. The method comprises a step of joining the first head chip and the second head chip that have been subjected to the groove processing.

More specifically, as shown in FIG. 7, when the plurality of first head chips 8, 8, 8 integrally formed are divided into individual head chips, the tracks of the write / read head 20 are previously determined. The first groove 8b is grooved by a method such as grinding so that the center line coincides with the center line of the width of the first rail 8a. Similarly, the center line of the track of the second magnetic head 22 coincides with the center line of the width of the second rail before joining the second head chip 9 to the first head chip. Thus, the second groove 9b and the rail groove 9c are grooved by a method such as grinding.

Then, as shown in FIG. 8, a glass filling groove 24 is formed on the side surface 9d of the second head chip 9, and a bonding glass rod 24A for bonding is inserted into the glass filling groove 24 to form the first head chip 9. The head chip 8 and the second head chip 9 are brought into contact with each other and joined by fusion. As a result, FIG.
Is manufactured.

Alternatively, as shown in FIG. 10, a low-melting glass is formed on the side surface 9d of the second head chip by sputtering.
Bringing the first head chip and the second head chip into contact with each other;
They may be joined by fusion. Thus, the head unit 10 shown in FIG. 9 is manufactured.

As described above, the first head chip 8 and the second head chip 8
Before joining the head chips 9, a groove is formed in advance so that the head chip portion 10 having a desired shape accuracy can be obtained.
Can be. In other words, the rail groove width W ₁ , the first rail width W ₄ , and the second rail width W ₃ are formed with the shape accuracy of wear, so that the center line of the first rail width W ₄ and the write / read head The track center line O ₁ of the second magnetic head 2 coincides with the center line of the second rail width W _3.
Head chip part 1 in which the track center line O _{2 of 2} is matched
0 is created. At the same time, inter-track distance W ₂ between the write read head 20 and the second magnetic head 22 is formed with a desired shape accuracy, variability between individuals is eliminated.

Furthermore, since the head chip section 10 is composed of two members, the first head chip 8 and the second head chip 9, the component cost is reduced and the cost can be reduced as compared with the conventional one. Production efficiency is increased because the head manufacturing time can be reduced.

As shown in FIGS. 2 and 4, the core forming member 11 attached to the head chip portion 10 thus formed has a substantially U-shaped base 25 made of a magnetic material. Legs 26a, 26b made of a non-magnetic material and formed upright above the base 25; and legs 26c, 2 made of a magnetic material and formed upright above the base 25.
6d and 26e. That is, the legs 26a, 26
b are erected at the ends of the base 25, respectively, and the legs 26c,
26e is erected at each corner of the base 25, and the leg 26d is erected between the leg 26c and the leg 26e.
Further, the leg 26d has a concave groove formed on the upper end surface on the head chip portion 10 side, and thus has a first end surface 27 and a second end surface 28.

The first coil portion 13A attached to the core forming member 11 includes a coil 12A and a first bobbin 29A around which the coil 12A is wound. The first bobbin 29A is formed in an L-shape, and is formed in a cylindrical shape in the height direction. The first bobbin 29A is formed such that the shape of the inner peripheral surface of the cylindrical portion is substantially the same as the shape of the outer peripheral surface of the leg 26c. Similarly to the first coil unit 13A, the second coil unit 13B includes the coil 12B and the coil 12B.
And a second bobbin 29B for winding B. This second
The bobbin 29B is formed in an L-shape, and the height direction is formed in a cylindrical shape. And this second bobbin 29B
The shape of the inner peripheral surface of the cylindrical portion is the leg 26e.
Is formed so as to have substantially the same shape as that of the outer peripheral surface thereof.

The first coil section 13A and the second coil section 13B are formed in a cylindrical shape with the coils 12A and 12B wound on the first bobbin 29A and the second bobbin 29B, respectively. Each leg 26
c, 26e.

The core portion 14 is thus formed by the core forming member 1.
In a state where the first coil unit 13A and the second coil unit 13B are attached to the head chip unit 1, the head unit 10 is brought into contact with the head chip unit 10 described above. At this time, the legs 26a and 26b are brought into contact with the vicinity of both corners of the head chip 10 on the second head chip side. The leg 26c is abutted so that its upper surface is magnetically connected to the read / write head 20. Further, the leg 26e is brought into contact with the erase head 21 so that its upper surface is magnetically connected to the erase head 21.
Furthermore, the leg 26d is connected to the read / write head 20.
And the first end face 27 which is located between the
Is magnetically connected to the read / write head 20, and the second
End face 28 is magnetically connected to the erase head 21.

As described above, the core section 14 and the head chip section 1
0 abuts on the legs 26c and 26d.
These constitute the magnetic core of the read / write head 20. That is, the read / write head 20
Now, the leg 26 to which the first coil 13A is attached is shown.
A magnetic path is formed between c and the leg 26d with which the first end surface 27 is in contact. The core part 14 and the head chip part 1
0 abuts on the legs 26e and 26d.
These constitute the magnetic core of the erase head 21. That is, in the erase head 21, a magnetic path is formed between the leg 26e to which the second coil portion 13B is attached and the leg 26d to which the second end surface 27 abuts.

On the other hand, as shown in FIG. 11, the gimbal 3 attached to the head 4 as described above has a substantially rectangular plate-like shape, and has a head attachment portion on which the above-described head chip 10 is mounted. 30 and a first annular frame portion 32 connected to the head mounting portion 30 via first connecting portions 31a and 31b so as to surround the outer periphery of the head mounting portion 30.
And a second annular frame portion 34 connected to the first annular frame portion 32 via second connecting portions 33a and 33b so as to surround the outer periphery of the first annular frame portion 32. ing.
In addition, the gimbal 3 includes first connecting portions 31a and 31b.
And the direction connecting the second connecting portions 33a and 33b are configured to be orthogonal to each other. Here, the first connecting portion 3
The direction connecting 1a and 31b is parallel to the medium sliding direction A. The gimbal 3 is made of, for example, a stainless steel material.

In this gimbal 3, the head mounting portion 3
0 is formed to have an outer shape slightly larger than the outer shape of the head chip portion 10 described above. The head mounting portion 30 has a pair of openings 35a and 35b separated in a direction perpendicular to the medium sliding direction A.

The gimbal 3 configured as described above is attached to the above-described head unit 4. Specifically, the gimbal 3 is attached between the above-described head chip unit 10 and the core unit 14. At this time, the head chip unit 10
The gimbal 3 is mounted on one surface of the gimbal 3 such that both corners of the second head chip 9 face from the opening 35a and the first head chip 8 faces from the opening 35b.
The leg 26a and the leg 26b are brought into contact with the portion facing the opening 35a from the other surface side of the gimbal 3. The leg 26c, the leg 26d, and the leg 26e are
The portion facing the opening 35b is abutted as described above.

Therefore, the opening 35a is connected to the leg 26a.
And an opening dimension enough to insert the leg 26b. In addition, the opening 35b is connected to the leg 26c,
The leg portion 26d and the leg portion 26e are formed to have an opening dimension enough to be inserted.

As described above, the gimbal 3 is attached to a halfway portion of the head portion 4 in the height direction.

As shown in FIGS. 12 and 13, the spacer member 2 to which the gimbal 3 is attached includes a peripheral wall 36 formed in a substantially annular shape, and a pivot mounting portion 37 erected inside the peripheral wall 36. And the upper end surface 3 of the pivot mounting portion
7a.

The peripheral wall 36 has an inner shape slightly larger than the outer shape of the core portion 14 and is formed in a cylindrical shape having an outer shape substantially the same as the outer shape of the gimbal 3 described above. The peripheral wall 36 has a magnetic shield 39 inside.
Having. The magnetic shield 39 is made of, for example, a magnetic material having a high magnetic permeability, and has an outer shape slightly smaller than the surrounding wall 36.

The pivot mounting portion 37 is formed so as to extend from the inner surface of the peripheral wall 36 to substantially the center and to stand upward from the substantially center, and to have a height slightly lower than the peripheral wall 36. It is formed to have. The pivot 38 is formed in a substantially hemispherical shape, and the upper end 38 a of the pivot 38 is placed on the upper end surface 37 a of the pivot placement portion.
6 so as to be located slightly above the height.

The spacer member 2 thus configured is
The peripheral wall 36, the pivot mounting portion 37, and the pivot 38 are formed by integrally molding. At this time,
The spacer member 2 is preferably insert-molded to arrange the magnetic shield 39 inside the peripheral wall 36.

The spacer member 2 is fixedly attached to the gimbal 3 as shown in FIG. That is, the spacer member 2 is attached to the surface opposite to the surface to which the head chip portion 10 is attached, that is, the other surface of the gimbal 3 described above. By attaching the other surface of the gimbal 3 to the spacer member 2, the pivot 38 presses the substantially central portion of the other surface of the gimbal 3 with a predetermined pressure. That is, gimbal 3
Is supported by the pivot 38 from the other surface.

At this time, the core portion 14 located on the other surface side of the gimbal 3 is housed inside the peripheral wall 36. Since the pivot mounting portion 37 is located at the opening of the base 25 formed in a substantially U-shape, it does not become an obstacle when the core portion 14 is housed inside the peripheral wall 36.

On the other hand, as shown in FIG. 15, the pair of support arms 1 to which the spacer member 2 is attached are formed of a plate-like member having a predetermined length, and one end (not shown) of which is not shown. (Not shown). The spacer members 2 described above are attached to the other ends of the pair of support arms 1, respectively. At this time, the spacer member 2 has an end face opposite to the end face to which the gimbal 3 is attached, attached to the other end of the support arm 1. At this time, the pair of support arms 1
Are disposed so that the spacer members 2 face each other.

In this magnetic head device, the spacer member 2
The height from the support arm 1 to the head portion 4 can be regulated by setting the height of the support arm to a predetermined value. That is, in this magnetic head device, the support arm 1 can maintain a non-contact state with the cartridge 5 in a state where the head unit 4 is at a position where recording and reproduction are performed on the flexible disk 6. In other words, the spacer member 2 is used when the support arm 1
And so high that it does not come into contact with.

The magnetic head device according to the present invention configured as described above performs recording and reproduction on the flexible disk 6 housed in the cartridge 5. In this magnetic head device, recording and reproduction are performed on the flexible disk 6 at a conventional standard recording density (lower mode), and recording and reproduction is performed at a high recording density (higher mode).

When performing recording / reproduction in the lower mode, the head unit 4 is brought into contact with the flexible disk 6,
In this state, the flexible disk 6 is rotated. At this time, the flexible disk 6 is rotated at a rotation speed of about 300 rpm.

In this magnetic head device, recording and reproduction are performed on the rotating flexible disk 6 by the first head chip 8. In the first head chip 8, the first coil portion 13A attached to the leg portion 26c is provided.
A magnetic path is formed between the leg 26c, the leg 26d, and the read / write head 20 by the magnetic field generated from. Then, a recording track is formed on the rotating flexible disk 6 by the read / write head 20. At the same time, in the first head chip 8, a magnetic path is formed between the leg 26e, the leg 26d, and the erase head 21 by a magnetic field generated from the second coil 13B attached to the leg 26e. I do. As a result, of the recording tracks formed by the read / write head 20, only the vicinity of both ends in the track width direction can be erased. Therefore, in the first head chip 8, a recording track having a desired track width can be formed.

On the other hand, when performing recording / reproduction in the upper mode, the head unit 4 is slightly lifted from the surface of the flexible disk 6, and the flexible disk 6 is rotated in this state. At this time, the flexible disk 6
It is rotated at a rotation speed of 600 rpm. As described above, when the flexible disk 6 is rotated at a high speed, convection of air occurs between the rail groove 9c formed in the head chip portion 4 and the flexible disk 6, and a so-called air film is formed. Thus, in this magnetic head device, the head unit 4 can be floated by a desired amount when performing recording and reproduction in the upper mode. Specifically, the head unit 4
Is about 50 nm with respect to the surface of the flexible disk 6.
Is emerging.

At this time, in order to control the flying height of the head unit 4, the width and height of the rails 8a and 9a formed on the medium facing surface of the head unit 4 may be defined to predetermined dimensions. Specifically, in order to set the flying height to about 50 nm, the widths W ₄ and W ₃ of the rails 8 a and 9 a having a length of 3 mm are set to 0.3 m.
m, and the heights H ₂ and H ₃ of the rails 8a and 9a are 0.1 mm.
And it is sufficient.

In general, a certain amount of vibration and runout occurs on the rotating flexible disk 6, but in this magnetic head device, the gimbal 3
Is attached, the head unit 4 is driven so as to follow such vibration and surface runout.

At this time, the gimbal 3 can displace the first annular member 32 and the head mounting portion 30 in a rotational direction about the direction connecting the second connecting portions 33a and 33b as a central axis. In addition, the gimbal 3 rotates in a rotation direction with the direction connecting the first connecting portions 33a and 33b as a central axis.
The head mounting portion 30 can be displaced.

As described above, since the gimbal 3 can displace the head attachment portion 30 in a predetermined direction, the head portion 4 attached to the head attachment portion 30 can be displaced in the above-described direction. . Therefore, in this magnetic head device, the position of the head unit 4 can be displaced so as to follow the runout of the flexible disk 6 and the like.

Further, in this magnetic head device, the gimbal 3 is attached to a middle part of the head part 4 in the height direction. Specifically, the head chip unit 10 and the core unit 1
4, a gimbal 3 is attached. Therefore, the head portion 4 has a midpoint in the height direction serving as a fulcrum for positional displacement.

By the way, in this magnetic head device,
Regardless of whether you use the upper mode or the lower mode,
When recording / reproducing is performed on the rotating flexible disk 6, vibration is transmitted to the head unit 4 directly from the flexible disk 6 or via an air film.

However, in this magnetic head device,
Even if the vibration is transmitted to the head portion 4, the fulcrum of the following displacement is located near the medium sliding surface, so that the rotational motion due to the vibration is small. That is, in this magnetic head device, the head portion 4 can reliably follow the surface runout of the flexible disk 6 without causing a large rotational movement due to the vibration.

Here, for comparison with the present invention, another head chip portion 100 and its manufacturing process will be described.

For example, as shown in FIG. 16, the head chip section 100 includes an upper head slider 101 on which a second head chip 105 is mounted, and a center slider 102.
, Write / read head 106 and erase head 1
And a side slider 104.

Each member is formed so that the heights H ₄ with respect to the direction in which the recording medium faces each other are the same. As shown in FIG. 17, the upper head slider 101, the center slider 102, the first head chip 103 and the side slider 104 are joined in this order by an adhesive glass 120 or the like.

After the members are joined, as shown in FIG. 18, rail grooves 101b and 102 are formed by rail groove processing.
a and 104a are formed, and rails 101a and 103a are formed by rail processing using a slicing machine or the like. Then, the front taper 11 is formed on the rails 101a and 103a by taper processing and depth processing.
0a and a rear taper 110b are formed.

Here, the rail grooves 101b, 102
Reference numerals a and 104a denote hundreds of the assembled head chip portions 100 shown in FIG. 17 on a jig based on the upper head slider 101 or the side slider 104, and grind the stone three or four times with a slicing machine or the like. It was made by sending.

At this time, although it is possible to keep the rail width tolerance within ± 5 μm due to the precision of feeding the grindstone by the slicing machine, there are variations in bonding, upper head slider 101, center slider 102, first head chip 103 and side head. It is necessary to accurately manage variations in the thickness of the slider 104, the adhesive layer, and the like, and it is practically difficult to keep the rail width tolerance within ± 5 μm. Therefore, for example, as shown in FIG. 19, the center of the width of the rail 101a is the second head chip 1
05 which do not match the position that is the center O _T of the track width was a case of occurrence of. If the head chip portion 100 is rail-processed one by one after assembling, it is possible to secure the center accuracy, but it takes a lot of man-hours, which causes a problem that it is not suitable for mass production.

On the other hand, in this example, as described above,
The head chip portion can be manufactured only by joining the two members of the first head chip 8 and the second head chip 9 formed in a predetermined size in advance. As a result, the number of processing steps and component costs can be reduced, and the cost can be reduced.

Further, in this example, rail processing is performed in advance,
Since the first head chip 8 and the second head chip 9 having the desired rail width are joined, the track widths W ₄ and W ₃ and the rail width centers O ₁ and O ₂ coincide. It is easy. Furthermore, the variation is eliminated by between individuals distance between tracks W ₂ between the respective heads 20, 22. As a result, the magnetic head device has a good state of contact between the head portion 4 and the flexible disk 6, and
As a result, good electromagnetic conversion characteristics can be obtained.

Further, in this embodiment, since rail processing is performed in advance, it is not necessary to perform rail processing after joining, and it is possible to shorten the head manufacturing time and improve production efficiency.

[0074]

As is clear from the above description, according to the present invention, the head chip is composed of only the first head chip and the second head chip, so that the cost can be reduced. Thus, the head manufacturing time can be reduced. Further, according to the present invention, since rail processing is performed before joining the first head chip and the second head chip, it is possible to obtain a desired dimensional accuracy and a good “round”, ie, Good electromagnetic conversion characteristics can be obtained.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view of a main part showing a configuration when recording and reproducing a disk-shaped recording medium by a magnetic head device to which the present invention is applied.

FIG. 2 is an exploded perspective view of a head unit in the magnetic head device.

FIG. 3 is a plan view of a head unit in the magnetic head device.

FIG. 4 is a side view of a head unit in the magnetic head device.

FIG. 5 is a perspective view of a first head chip in the head section.

FIG. 6 is a perspective view of a second head chip in the head section.

FIG. 7 is a perspective view showing a manufacturing process of the first head chip unit.

FIG. 8 shows a first head chip and a second head chip in the head section.
FIG. 7 is a perspective view showing a bonding step with the head chip.

FIG. 9 shows a first head chip and a second head chip in the head section.
FIG. 7 is a perspective view showing the completion of bonding with the head chip.

FIG. 10 shows a first example of another head unit to which the present invention is applied.
FIG. 8 is a perspective view showing a bonding step between the head chip and the second head chip.

FIG. 11 is a plan view of a gimbal in the magnetic head device.

FIG. 12 is a plan view of a spacer member in the magnetic head device.

FIG. 13 is a longitudinal sectional view of a spacer member in the magnetic head device.

FIG. 14 is a partial cross-sectional view showing a state where the head unit, the gimbal, and the spacer member are assembled.

FIG. 15 is a partial sectional perspective view showing a state where the head unit, the gimbal, the spacer member, and the support arm are assembled.

FIG. 16 is an exploded perspective view showing a configuration of another head chip portion used for comparison with the present example and showing a state before assembly.

FIG. 17 is a perspective view showing a configuration of another head chip portion used for comparison with the present example and showing a state after assembly.

FIG. 18 shows a configuration of another head chip portion used for comparison with the present example, and shows a rail groove,
It is a perspective view which shows when taper etc. are formed.

FIG. 19 is a perspective view showing a configuration of the other head chip portion used for comparison with the present example, and showing a case where the center line of the rail does not coincide with the center of the track width.

[Explanation of symbols]

Reference Signs List 8 first head chip, 8a first rail, 9 second head chip, 9a second rail, 9c rail groove 20 write / read head, 21 erase head, 22 second magnetic head

Claims (2)

[Claims] A first rail formed substantially parallel to a running direction of the disk-shaped recording medium, and recording and recording data at a first recording density in a state of being in contact with a recording surface of the disk-shaped recording medium. And / or a first head chip to be reproduced and a slider member having a second rail formed in parallel with the first rail, the first recording medium being floated from the signal recording surface of the disk-shaped recording medium. A magnetic head device comprising a second head chip mounted with a second magnetic head for recording and / or reproducing data at a second recording density higher than the density. A first head chip for recording and / or reproducing data at a first recording density in contact with a recording surface of the disk-shaped recording medium, substantially parallel to a running direction of the disk-shaped recording medium; Forming a first rail; and a second magnetic head for recording and / or reproducing data at a second recording density higher than the first recording density while floating from a signal recording surface of the disk-shaped recording medium. Forming a second rail in parallel with the first rail on a second head chip mounted on a slide member; joining the first head chip portion and the second head chip portion A method of manufacturing a magnetic head device.