JP2551700B2 - Magnetic disk drive - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION This invention includes a predetermined plural stacked arranged with an interval disk, a disk drive unit for rotating these discs, the tip portion is extended on each recording surface of the disk and positioner, as <br/> tip of the positioner crosses a track of said disk, said
The present invention relates to a magnetic disk device including a positioner drive unit that drives a positioner, and a recording / reproducing unit that is provided on the tip end side of the positioner and that reads / writes data from / to the recording surface of the disc.

[0002] In recent years, miniaturization of the magnetic disk device, thinner, larger capacity, especially of the price reduction, there is an increasing demand for low power consumption, for this purpose, the head and the media (disk)
It is desired to improve the performance and mount a large number of media in a small space, or to mount the same number of media as the conventional one while suppressing the device height as much as possible.

[0003]

2. Description of the Related Art Next, a conventional example will be described with reference to the drawings. 2 0 is a plan view of the head support mechanism of a conventional magnetic disk apparatus, FIG. 2 1 is a front view in FIG. 2 0, 2 2 is a main part configuration diagram of a magnetic disk device.

[0004] In these figures, the tip portion of the positioner being driven across the tracks of the disk (Ah
A base end portion of a suspension 3 formed by bending an ultra-thin plate of stainless steel as a support member is attached via a spacer 2 to the frame 1) using a screw 4. The spacer 2 is used as a reinforcing material for the suspension 3. Further, bent portions 3b are formed on both sides of the suspension 3 in order to ensure rigidity.

At the tip of the suspension 3, a magnetic head 6 for reading / writing data from / on a disk 7 arranged at a predetermined interval is attached via a gimbal 5 as a supporting member.

[0006]

However, in the head supporting mechanism having the above-described structure, in order to increase the number of disks 7 to be mounted, the thickness of the arm 1 is reduced so that the disk 7 is
It is conceivable to reduce the face-to-face distance of. However, if it is made too thin, there is a problem that the bent portions 3b of the adjacent suspensions 3 interfere with each other and the inter-plane distance of the disks 7 cannot be reduced.

[0007] In addition, since the required thickness of the magnetic head 6 and the spacer 2, the interplanar distance L of the disk 7 (see FIG. 2 2)
It is difficult to reduce the thickness to 3 mm or less, and there is a problem that the number of mounted disks 7 cannot exceed a certain number with a predetermined height of the device.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a magnetic disk device capable of narrowing the interplanar distance between disks.

[0009]

FIG. 1 is a diagram showing the principle of the present invention. In this figure, reference numeral 11 denotes a plurality of disks which are stacked and arranged at a predetermined interval and which are rotationally driven by a disk drive unit (not shown). 12 is the tip
It is a positioner that is driven by a positioner drive unit (not shown ) so that the (arm) extends on each recording surface of the disk 11 and crosses the tracks of the disk 11.

Reference numeral 13 denotes an integrated type integrated magnetic head as a recording / reproducing section. The integrated type integrated magnetic head 13 has a thin plate-like base portion 13a having elasticity and one end surface of the base portion 13a. Head portion 13 in which a gap is formed
b, and a mounting portion 13c formed on the other surface of the base end portion of the base portion 13a.

A positive member extending between the adjacent disks 11.
The top and bottom of the tip of the shorener 12 facing the disk 11.
Is the vertical thickness of the tip sandwiched between the upper and lower surfaces.
The disc so that it becomes thinner gradually toward the tip.
The taper surface 12a is inclined with respect to. That
The integrated integrated magnetic head 13 is attached to the tapered surface 12a.
The attachment portion 13c of is attached. By this
The two attached to the tip of the positioner 12.
The integrated type integrated magnetic heads 13 will intersect.

Although not shown, the FPC for wiring is
Is guided to the vicinity of the tapered surface 12a at the tip of the horn 12,
Therefore, it is connected to the lead wire of the integrated type integrated magnetic head 13.
Has been.

According to the second aspect of the invention, the positioner
As the opening area goes deeper at the tips located between the disks
Therefore, the notch groove is formed so as to become gradually narrower,
The upper and lower inner wall surfaces of this notch groove are tilted with respect to the disc.
It has an inclined taper surface. Collected on the upper and lower tapered surfaces
The mounting part of the stacking type integrated magnetic head is attached.
It

According to a third aspect of the present invention, the taper surface of the first or second aspect of the invention is formed with respect to the recording surface of the disk.
It is tilted 5 to 10 degrees.

[0015] invention 請 Motomeko 4 described, the predetermined multiple stacked arranged with an interval disk, a disk drive unit for rotating these discs, the tip portion is extended on each recording surface of the disk Positioner and positioner so that the tip of the positioner crosses the disc track.
A positioner driving unit for driving the over, provided at the distal end portion side of the positioner, in a magnetic disk apparatus having a recording unit for performing data read / write to the recording surface of the disk, having elastic lamellar base portion, the head portion gap on one surface of the distal end portion is formed in the base portion, and formed at the base end portion of the base portion, Ri name from attachment portion bent relative to the other portion Record and playback
And integrated integrated magnetic head constituting the part, the positioner
Formed on the tip located between the discs of the
Install the upper and lower mounting surfaces that are substantially parallel to each other.
Mount the integrated type magnetic head mounting part on the contact surface
The feature is that the integrated type integrated magnetic heads are crossed.
To do .

[0016]

[Action] In the magnetic disk apparatus of the first aspect is without using the conventional sub scan pension and the spacer is formed so as to be gradually thinner toward the tip thickness of the stacking direction of the disc of the positioner tip Obtained by
The integrated type integrated magnetic head 1 is provided on the upper and lower tapered surfaces 12a.
3 is attached. Therefore, the integrated type integrated magnetic head
Take the blade 13 so that it crosses the tip of the positioner 12.
As a result, the surface distance of the disk 11 can be reduced.

Further , the FPC for wiring is used as the positioner 12.
Is guided to near the taper surface 12a at the tip of the
Is connected to the lead wire of the mold-integrated magnetic head 13.
The lead wire may be routed near the disk 11.
As a result, the lead wire is directed toward the disk 11.
The amount of protrusion also becomes small, and from this point as well, the surface of the disk 11 is
It becomes possible to reduce the distance.

In the magnetic disk drive having the structure of claim 2
, Without using the conventional suspension and spacer,
The middle of the thickness of the positioner tip in the stacking direction of the disks
A tapered surface is formed on the part where the integrated type integrated magnetic head is formed.
Are installed. Therefore, equivalently, the position
The tip of the knuckle has been made thin,
It becomes possible to reduce the distance.

In the magnetic disk drive having the structure of claim 4 , the conventional suspension and spacer are not used, and
Instead of forming a tapered surface on the tip of the positioner,
Integrated magnetic head with a bent mounting part
Use this mounting part to mount the tip of the positioner
It is attached to the rake face. In this case also, integrated integrated magnetic
Mount the head so that it crosses the tip of the positioner
As a result, the inter-plane distance of the disc can be reduced.

[0020]

EXAMPLE A first example of the present invention will be described with reference to FIGS. 2 is a configuration diagram for explaining a main part of the magnetic disk device according to the first embodiment of the present invention, FIG. 3 is a front view of FIG. 2, and FIG. 4 is an enlarged side view of the integrated type integrated magnetic head of FIG. 5 is an enlarged cross-sectional view of the head portion in FIG. 4, FIG. 6 is a cross-sectional view taken along the line AA in FIG. 2, FIG. 7 is a plan view illustrating the entire magnetic disk device, and FIG. 8 is a front view of FIG. 9 is a diagram for explaining a first example of the lead wire of the integrated type integrated magnetic head in FIG. 2, and FIG. 10 is FIG.
FIG . 6 is a diagram for explaining a second example of the lead wire of the integrated type integrated magnetic head in FIG .

First, the overall structure of the magnetic disk drive of this embodiment will be described with reference to FIGS . 7 and 8. In these figures, 21 is the base of the magnetic disk drive. A plurality of discs 23 (three in this embodiment) are rotatably stacked on the base 21 via a spacer 22. The plurality of disks 23 are driven to rotate at high speed (for example, 3600 rpm) by a spindle motor as a drive unit (not shown).

The disc 24 has a tip portion (arm 27) 24.
The positioner is rotatably provided on the base 21 so as to cross the third track. This positioner 24
A coil 25 is provided at the other rotation end of the coil.

The coil 25 is arranged in the magnetic gap of the magnetic circuit 26 provided on the base 21.
By passing an electric current through the coil 25, a propulsive force is generated in the coil 25 . Thus, VCM for rotating the positioner 24 (voice coil motor) is formed
It

[0024] positioner 24 includes an arm 27 extending on each recording surface of the disk 23 (in this embodiment, four) plurality of being eclipsed set. Specifically, the arm 27 is laminated on the rotary shaft of the positioner via the spacer 29. A recording / reproducing section for reading / writing data from / to the disk 23 is provided at the tip of the arm 27.

Next, the recording / reproducing section of this embodiment will be described with reference to FIGS. The surface facing the disk 23 of the distal end of the arm 27, the tapered surface 27 where the thickness of the stacking direction of the disc 23 of A over arm 27 is formed to be thinner toward the tip end is formed. And the tapered surface 2
A base end of the recording / reproducing unit is provided at 7a. The taper angle θ (see FIG. 6) of the taper surface 27a of the present embodiment is formed to be 5 to 10 degrees with respect to the surface of the disk 23.

As the recording / reproducing section of this embodiment, a thin plate integrated integrated magnetic head as shown in FIG. 4 (the integrated integrated magnetic head of this embodiment is Data Strage 90 An Intern
ational Forum; September 10-12,1990 Fairmont Hot
28 announced by Censtor Corporation in El San Jose, California) is used.

The integrated magnetic head 28 will be described below. This integrated type integrated magnetic head 28 is provided with an elastic thin plate-shaped base portion 28a, a tip portion of the base portion 28a, a head portion 28b having a gap formed on one surface, and a base end portion of the base portion 28a. And a mass of about 1 mg. In the present embodiment, the stacking direction of the opposing surface of the disk 23 of the disk 23 and the arm 27 a distance t
(See FIG. 3) is set to 0.3 to 0.6 mm, and the head portion 28b is set to be flexible to 0.3 to 0.6 mm in the stacking direction of the disks 23.

As a method of attaching the integrated type integrated magnetic head 28 of this embodiment, there are a method using a thermosetting adhesive and a method such as spot welding with a laser. In this embodiment, a thermosetting adhesive is used. Specifically, first, the integrated type integrated magnetic head 28 is attached to the tapered surface 27 a of the arm 27.
A method of temporarily fixing the attachment portion 28c of the above with a thermosetting adhesive, positioning the integrated type integrated magnetic head 28, and then heating the adhesive portion to cure it is adopted.

Further, referring to FIG. 5, an integrated type integrated magnetic head is used.
Head part 28 of do 28bWill be explained. Head part 28b
Is a yoke 28d and a coil wound around the yoke 28d.
Is formed between the ends of the yoke 28e and the yoke 28d.
It consists of a cap 28f.

Next, the設方method with the lead of the integrated integrated magnetic head 28 of this embodiment will be described with reference to FIG. An FPC 31 is attached to one side on one surface of the arm 28 from the base end portion to the tip end portion. The lead wire 42 of the integrated magnetic head 28 is connected to the tip of the FPC 41. It is also possible to to provide a FPC43 as shown in FIG. 1 0 in the central portion of one surface of the arm 27.

The operation of the above embodiment will be described. Disc 2
Reference numeral 3 is rotationally driven by a spindle motor (not shown) as a drive unit. Then, when an electric current is passed through the coil 25, a propulsive force is generated in the coil 25 arranged in the magnetic gap of the magnetic circuit 26, and the positioner 24 is rotationally driven with respect to the base 21.

By rotating the positioner 24,
The head portion 28b of the integrated magnetic head 28 attached to the tip of the arm 27 accesses a desired track of the disk 23 to read / write data from / to the disk 23.

In the above structure , the conventional suspension and
Positioner 24 (arm 27) without spacers
The taper surface 2 obtained by forming the disk 23 such that the thickness of the disk 23 in the stacking direction becomes gradually thinner toward the tip.
A mounting portion 28c of a thin plate-type integrated magnetic head 28 is fixed to 2a . Therefore, integrated type integrated
The magnetic head 28 intersects the tip of the positioner 24.
Will be attached as shown in FIG.
The separation can be narrowed to a value slightly larger than the thickness of the arm 28.

In addition, the FPCs 41 and 43 for wiring are
Near the tapered surface 22a at the tip of the shoulder 24 (arm 27)
It is guided to the side, where the integrated magnetic head 28
The lead wire is connected to the disk 23
It will not be routed in the vicinity, and as a result, the lead
The amount of protrusion of the line in the direction of the disk 23 also becomes small.
It is also possible to reduce the surface distance of the disk 23
Becomes Specifically, in the conventional example, the face-to-face distance of the disk was about 3 mm at the maximum, but in the present embodiment, it is 1.5 to 2.5 mm.
Could be about.

In the conventional head support structure, the head,
Suspension, gimbal, spacer total mass is 300m
The mass of the integrated magnetic head 28 of the present embodiment, which replaces it, is 1 mg. Furthermore, the weight of the integrated type integrated magnetic head 28 can be reduced, so that the rigidity of the arm 27 can be lowered, and accordingly, the arm 2
The mass of 7 can also be reduced. Therefore, the moment of inertia of the positioner 24 is significantly reduced, and high-speed access is possible as compared with the conventional case.

Next, a second embodiment of the present invention will be described with reference to FIGS. 11 and 12. Here, FIG. 11 shows the first embodiment of the present invention.
2 is a plan view illustrating the second embodiment, and FIG.
FIG. In these figures , the same parts as those in the first embodiment are designated by the same reference numerals, and their description will be omitted. The difference between this embodiment and the first embodiment is the positioner 51. The arm 27 of the positioner 24 of the first embodiment is alternately laminated with the spacer 29 and is composed of a separate member. However, the arm 51a of the present embodiment has the spacer 2
It is integrated with 9 and is formed by cutting or the like.
Also in this configuration, the same effect as that of the first embodiment can be obtained.

Next, a third embodiment of the present invention will be described with reference to FIGS. FIG. 13 shows a third embodiment of the present invention.
FIG. 14 is a configuration diagram illustrating a main part of an example magnetic disk device.
13 is a front view of FIG. 13, and FIG. 15 is a magnetic view of FIG.
A plan view of the disk device, and FIG. 16 is a front view of FIG.
FIG. 17 and FIG. 17 are sectional views taken along line BB in FIG. In these figures, the same parts as those in the first embodiment are designated by the same reference numerals, and their description will be omitted.

The difference between this embodiment and the first embodiment is that
The positioner 61. Positioner 61 of this embodiment
In order to increase the access speed, the tip of the arm 62 of the positioner 61 is formed into a bifurcated shape, and data read / write is performed on the inner track and the outer track of the disc, respectively. The first and second integrated magnetic heads 63 and 64 are attached. The configuration of the integrated type integrated magnetic heads 63 and 64 is the same as that of the integrated type integrated magnetic head in the first embodiment.

On the surface of the front end of the bifurcated arm 62 facing the disc 23, the thickness of the arm 62 in the laminating direction of the disc 23 becomes thinner toward the front end. 1 and 2nd taper surface 62a, 62
b is formed. The first and second tapered surfaces 62a, 62b to the mounting portion of the first and second integrated integrated magnetic heads 63, 64 63c, 64c takes
It has been kicked with. Also in the magnetic disk device having the configuration of this embodiment, the same effect as that of the first embodiment can be obtained.

Next, a fourth embodiment of the present invention will be described with reference to FIG. 18. FIG. 18 illustrates a fourth embodiment of the present invention.
FIG. 3 is a cross-sectional configuration diagram of relevant parts. In this figure, the same parts as those in the first embodiment are designated by the same reference numerals, and their description will be omitted.

The difference between this embodiment and the first embodiment is that
The positioner 81. Positioner 81 of this embodiment
A notched groove 82a is formed at the tip end of the arm 82 of the No. 8 and the opening area gradually narrows as it goes deeper.
The upper and lower inner wall surfaces of the cutout groove 82a are inclined with respect to the disc.
It has a tapered surface. The mounting portion 28c of the integrated magnetic head 28 is attached to the tapered surface.

In this embodiment , the conventional suspension
Without emissions and spacers, Di Pojishi Yona tip
In the middle part of the thickness of the disc in the stacking direction (cutout groove 82a)
A taper surface is formed, and an integrated magnetic head 2 is formed there.
8 is installed, so equivalently, the positioner 8
1 (arm 82) is thinly formed,
It is possible to reduce the distance between the surfaces of the disks.

Next, with reference to FIG. 19, a description will be given of a fifth embodiment of the present invention. FIG. 19 illustrates the fifth embodiment of the present invention.
FIG. In this figure, the same parts as those in the first embodiment are designated by the same reference numerals, and their description will be omitted. In this figure, a part different from the first embodiment is a positioner 91. The distal end of the arm 92 of the positioner 91 of this embodiment (the upper and lower surfaces), the disk 2
A mounting surface 92a that is substantially parallel to 3 is formed.

On the other hand, in the integrated type integrated magnetic head 93, a thin plate-shaped base portion 93a having elasticity and a head portion 93 in which a gap is formed on one surface of the tip portion of the base portion 93a.
b, and a mounting portion 93c formed at the base end portion of the base portion 93a and bent with respect to other portions. The mounting portions 93c of the integrated magnetic head 93 are mounted on the upper and lower mounting surfaces 92a of the arm 92.

In this embodiment , the conventional suspension
Positioner 91 (a
Do not form a tapered surface at the tip of
Integrated type integrated magnetic head 9 in which the attachment portion 93c is bent
3 is used to attach the mounting portion 93c to the positioner 91.
It is attached to the attachment surface 92a at the tip. in this case
The integrated magnetic head 93 is
It will be attached so that it intersects the tip,
It is possible to reduce the surface distance of the disc.

[0046]

As described above, the invention according to claim 1
Then, without using the conventional suspension and spacer,
The thickness of the positioner tip in the stacking direction of the disc
It is obtained by forming the film so that
The integrated magnetic head is mounted on the upper and lower tapered surfaces
I have. Therefore, the integrated magnetic head is positive
To be installed so as to intersect the tip of the Schonner
It is possible to reduce the surface distance of the disc.
It

Further , the FPC for wiring is located beyond the positioner.
It is led to the vicinity of the tapered surface at the end, where the integrated type integrated magnetic
Since it is connected to the lead wire of the air head,
It will not be routed near the disc,
As a result, the amount of protrusion of the lead wire in the disk direction is also reduced,
From this point as well, it is possible to reduce the disc face-to-face distance.
It becomes Noh.

According to the second aspect of the invention, the conventional suspension is used.
Of the positioner tip without using the
A tapered surface is formed in the middle of the thickness of the disks in the stacking direction
The integrated magnetic head is attached here.
It Therefore, equivalently, make the tip of the positioner thin.
The discs are made smaller, and the distance between the disc surfaces is reduced.
It becomes possible.

According to the invention described in claim 4, the conventional suspending device is used.
Without a positioner and spacer, and beyond the positioner
No tapered surface at the end, instead the mounting part is bent
Using the integrated integrated magnetic head
Is attached to the mounting surface of the tip of the positioner.
It In this case also, the integrated magnetic head is
-It will be attached so that it intersects the tip of the
It is possible to reduce the distance between the surfaces of the disks. Yo
Thus, any of the inventions can realize a magnetic disk device capable of reducing the inter-plane distance of disks.

[Brief description of drawings]

FIG. 1 is a principle diagram of the invention according to claim 1;

FIG. 2 is a configuration diagram illustrating a main part of the magnetic disk device according to the first embodiment of the present invention.

FIG. 3 is a front view of FIG.

FIG. 4 is an enlarged side view of the integrated magnetic head shown in FIG.

5 is an enlarged cross-sectional configuration diagram of a head unit in FIG.

6 is a sectional view taken along line AA in FIG.

FIG. 7 is a plan configuration diagram illustrating an entire magnetic disk device.

FIG. 8 is a front view of FIG.

9 is a diagram illustrating a first example of a lead wire of the integrated type integrated magnetic head in FIG. 2. FIG.

10 is a diagram illustrating a second example of the lead wire of the integrated type integrated magnetic head in FIG.

FIG. 11 is a plan configuration diagram illustrating a second embodiment of the present invention.

FIG. 12 is a front view of FIG. 11.

FIG. 13 is a configuration diagram illustrating a main part of a magnetic disk device according to a third embodiment of the present invention.

FIG. 14 is a front view of FIG.

FIG. 15 is a plan view of the magnetic disk device in FIG.

16 is a front view of FIG.

17 is a sectional view taken along line BB in FIG.

FIG. 18 is a sectional view showing the configuration of a main part for explaining a fourth embodiment of the present invention.

FIG. 19 is a side sectional view of an essential part for explaining a fifth embodiment of the present invention .
It is a side view.

FIG. 20 shows a head support mechanism of a conventional magnetic disk device.
It is a plan view.

21 is a front view of FIG . 20. FIG.

FIG. 22 is a configuration diagram of a main part of a magnetic disk device .

[Explanation of symbols]

11 Disk 12 Positioner 12a Tapered Surface 13 Integrated Integrated Magnetic Head 13a Base 13b Head 13c Attachment

Continuation of the front page (56) Reference JP-A-56-74812 (JP, A) JP-A-2-158982 (JP, A) Actually open 2-1-1772 (JP, U) Actually open 48-7024 (JP , U) Actually developed 63-113267 (JP, U) European patent 430407 (EP, B)

Claims (4)

(57) [Claims] 1. A plurality of discs (11) arranged in layers at a predetermined interval, a disc drive unit for rotationally driving the discs (11), and a tip portion of the disc (1).
Positioner and extending over respective recording surfaces of the 1) and (12),
Tip the disc of the positioner (12) (1
Positioner (1 ) so that it crosses the track of 1).
A positioner drive unit for driving the disk (1) and a disk (1) provided on the tip side of the positioner (12).
In a magnetic disk apparatus having a recording unit for performing data read / write with respect to the recording surface of the 1), a thin plate-shaped base portion having an elastic (13a), the base portion of the distal end portion of (13a) head a gap is formed on one surface (13b), and Ri name from the base portion mounting portion formed on a base end portion of (13a) (13c), the
Integrated integrated magnetic head (13) constituting a recording / reproducing unit
And between the disc (11) of the positioner (12)
The upper part of the located tip end facing the disc (11)
The lower surface, the top and bottom of the tip sandwiched between the upper and lower surfaces
The thickness in the direction becomes gradually thinner toward the tip,
Upper and lower taper surfaces (12a) inclined with respect to the disc
And a taper surface (12) at the tip of the positioner (12).
a) Guided to the vicinity, where the integrated type integrated magnetic head
A FPC is provided which is connected to the leads of de (13), the mounting portion (13c) mounted in said integrated integrated magnetic head to said upper and lower tapered surfaces (12a) (13), before
A magnetic disk device characterized in that the integrated magnetic heads (13) are crossed . 2. A plurality of layers arranged at a predetermined interval.
Discs and discs that rotate these discs
Drive part and tip part extend on each recording surface of the disc
Positioner and the tip of the positioner
Drive the positioner so that it crosses the track of the disc.
Positioner drive that moves and tip of the positioner
Provided on the disc side, and data is recorded on the recording surface of the disc.
Magnetic De comprising a recording unit for performing the read / write
In the disk device, an elastic thin plate-shaped base portion and a tip portion of the base portion
The head portion having a gap formed on one surface and the head
The mounting portion formed at the base end of the base portion,
An integrated type integrated magnetic head that constitutes a recording / reproducing unit, and a tip portion located between the disks of the positioner
The opening area becomes gradually narrower as it goes deeper
The inner wall surface of the cutout groove formed in
Upper and lower taper surfaces inclined with respect to each other, and the upper and lower taper surfaces of the integrated integrated magnetic head are mounted on the upper and lower taper surfaces.
A magnetic disk device having a mounting portion . 3. The taper surface is a recording surface of the disk.
Claims characterized by having an inclination angle of 5 to 10 degrees with respect to
Item 1. The magnetic disk device according to Item 1 or 2 . 4. A plurality of laminates arranged at a predetermined interval.
Discs and discs that rotate these discs
Drive part and tip part extend on each recording surface of the disc
Positioner and the tip of the positioner
Drive the positioner so that it crosses the track of the disc.
Positioner drive that moves and tip of the positioner
Provided on the disc side, and data is recorded on the recording surface of the disc.
Magnetic read / write unit for reading / writing
In the disk device, an elastic thin plate-shaped base portion and a tip portion of the base portion
The head portion having a gap formed on one surface and the head
It is formed at the base end of the base part and is bent with respect to other parts.
Integrated unit that constitutes the recording / reproducing unit,
Type magnetic head and the tip of the positioner located between the disks
Upper and lower mounting surfaces that are formed and are substantially parallel to the disc
Is provided on the upper and lower mounting surfaces of the integrated type integrated magnetic head.
Attaching the mounting part, the integrated type integrated magnetic head
A magnetic disk drive characterized in that (13) is crossed .