JP2873769B2 - Floating magnetic head - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a floating magnetic head used for a magnetic recording device such as a computer.

[0002]

2. Description of the Related Art For example, FIG.
Alternatively, there is a floating magnetic head shown in FIG.
No. 08). In the floating magnetic head 1 shown in FIG. 3, a notch 3 is provided on a side surface of a slider 2 made of a non-magnetic material, and a magnetic head core 4 is bonded to the notch 3 using a glass 5. A track portion 6 having a predetermined width W is formed by performing an oblique grinding process on an upper portion of the outer surface, and an upper portion 7 of the outer surface of the magnetic head core 4 is made to coincide with a slope portion 8 formed on an upper portion of the side surface of the slider 2. It has become something.

In a floating magnetic head 1 shown in FIG. 4, a magnetic head core 4 having the same length as the slider 2 is joined to a side surface of a slider 2 made of a non-magnetic material by a glass 5, and then the exposed upper surface of the magnetic head core 4 is exposed. The track portion 6 having a predetermined width dimension W is formed by subjecting the track portion 6 to oblique grinding.

[0004]

By the way, in the floating magnetic head 1, when a medium (recording medium) such as a disk is rotated at a high speed, a CSS (Contact Start Stop) system is used.
While the medium floats from the surface of the medium at intervals of 1 to 0.3 μm, the sliding surface of the floating magnetic head 1 is pressed against the surface of the medium when the rotation of the medium is stopped. It is desired to prevent the surface of the media from being damaged by the edge portions 9 of the media, that is, to improve the CSS resistance.
On the other hand, in the floating magnetic head 1 described above, the edge portion 9 of the slider 2 or the edge portion of the magnetic head core 4 is not treated for improving the CSS resistance, and the edge portion 9 of the slider 2 or the edge portion 9 of the slider 2 is not treated. The edge of the magnetic head core 4 may damage the surface of the medium.

Incidentally, with respect to the above-mentioned floating magnetic head 1,
It is conceivable to improve the CSS resistance by chamfering the edge 9 of the slider 2 or the edge of the magnetic head core 4. However, chamfering the edge portion 9 of the slider 2 or the edge portion of the magnetic head core 4 in the floating magnetic head 1 shown in FIG. 3 or 4 is structurally chamfered with respect to the edge portion 10 on the width direction side of the track portion 6. This causes processing, so that the edge portion 10 of the track portion 6 is rounded, and the track portion 6 having a desired width dimension W is formed.
Was not obtained, and the above-mentioned demand could not be properly met.

The present invention has been made in view of the above circumstances, and has as its object to provide a floating magnetic head capable of improving CSS resistance without obstructing securing a track portion having an appropriate width dimension. Aim.

[0007]

In order to achieve the above object, the present invention comprises a substantially rectangular non-magnetic material,
A rail for generating levitation force on the surface facing the recording medium
And a head with a recording / playback gap.
A floating magnetic head integrated with a core .
The head core is joined to a side surface of a rider, and the head is
On the side of the core opposite to the joint surface with the slider
Of the slider near the rail surface
And the thickness of the part exposed on the rail surface is defined as the track width.
And at the edge of the slider
Chamfering the exposed part except for the joint with the head core
It is characterized by performing .

[0008]

With this configuration, since the head core is provided so as to protrude from the slider, the edge of the rail of the slider can be chamfered independently of the head core. Further, the slider at the edge portion
Chamfer the exposed part except for the joint with the head core
As a result , the magnetic recording medium is not damaged by the edge even when the CSS operation is performed.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a floating magnetic head 1 according to an embodiment of the present invention will be described.
Will be described based on FIG. 1 and FIG. The same members and portions as those shown in FIGS. 3 and 4 are denoted by the same reference numerals. The floating magnetic head 1 shown in FIGS. 1 and 2 has a substantially rectangular slider 2 made of a non-magnetic material. An upper surface of the slider 2 is opposed to a magnetic recording medium (hereinafter, referred to as a medium), and rails (floating surfaces) 11 and 12 for generating a levitation force are provided in this portion.

A recording / reproducing gap 14 is provided on the side of the rail 2 on the rail 11 side on the air outflow end 13a side.
A magnetic head core (head core) 4 having a track portion 6 formed with a groove and being shorter than the slider 2 protrudes using the low-melting glass 15 with the track portion 6 positioned on the rails 11 and 12 side. Adhered in state. Since the magnetic head core 4 is provided so as to protrude from the slider 2, the rails 11 and 12 of the slider 2 are provided.
Of the edge portion 9 can be performed independently of the magnetic head core 4, and the width dimension W of the track portion 6 does not need to be shortened in performing the chamfering process on the slider 2.

In this case, the bonding by the low melting point glass 15 is as follows.
The low melting point glass film is formed on the bonding surface of the slider 2 using a sputtering method. When bonding with the low-melting glass 15, the slider 2 is printed.
A low-melting glass film may be formed on the bonding surface of. In this embodiment, the magnetic head core 4 is bonded to the slider 2 by using the low-melting glass 15.
Other adhesives such as low melting point metals may be used.

The magnetic head core 4 is made of, for example, a single crystal Mn.
It is composed of two substantially L-shaped cores 16 and 17 made of Zn ferrite. That is, an Fe-Al-Si alloy magnetic film is formed on the formation surface of the recording / reproducing gap 14 in each of the two cores 16 and 17, and an insulating film is further formed thereon. The magnetic head core 4 is manufactured by welding the cores 16 and 17 with glass and then cutting unnecessary welded portions. Of the two cores 16 and 17 constituting the magnetic head core 4, the inclined portion 18 on the air inflow end 13 b side of the core 16 on the air inflow end side was previously subjected to C chamfering (chamfering with a certain angle). It has become something.

In this embodiment, an example is given in which an Fe—Al—Si alloy magnetic film is formed on each of the two cores 16 and 17 on the formation surface of the recording / reproducing gap 14 located on the rail 11 side. Alternatively, a Fe—Al—Si alloy magnetic film may be formed on one of the sides. Also, the case where the two cores 16 and 17 are single crystal MnZn ferrite is taken as an example, but the polycrystalline MnZn ferrite is used.
Ferrite may be used.

The slider 2 and the magnetic head core 4 are subjected to the following various processes. These various processes will be described below along the production procedure of the floating magnetic head 1. First, after the magnetic head core 4 is bonded to the slider 2, the air outflow end 13a side of the slider 2 is chamfered. By this C chamfering, the edge 19 of the magnetic head core 4 on the air outflow end 13a side is also simultaneously C-shaped.
It will be chamfered. Thereafter, the rails 11 and 12 of the slider 2 are lap mirror-finished so that the recording and reproducing gap 14 in the magnetic head core 4 has a predetermined depth.

When the edges 9 of the rails 11 and 12 of the slider 2 are chamfered by tape wrap, the magnetic head core 4
The exposed outer edge (not shown) is also chamfered on the tape wrap. Then, the upper surface of the exposed magnetic head core 4 is ground to form an inclined surface 21.
(Ie, the joint surface of the head core with the slider)
Near the rail surface of the slider on the side surface opposite to
Is formed into a slope) and a predetermined width (6 μm in this embodiment)
The track portion 6 was formed. As a result, the portion of the exposed outer edge portion (not shown) of the magnetic head core 4 where the tape wrap is chamfered is cut off to form the inclined surface 21 by the above-mentioned grinding, and the track having a predetermined width W is formed. Since the portion 6 is formed, the track width W does not change due to the tape wrap.

As described above, the rails 11 and 12 are chamfered (that is, excluding the facing portion 20 with the track portion 6), that is, the edge portion 9 which is exposed .
The joint between the slider edge and the head core
(Beveling the exposed part that has been removed)
Even when the S-type operation is performed, the media is not damaged by the edge portion 9, that is, the CSS resistance is improved. For this reason, the reliability is high, and it is possible to cope with high-density recording.

The floating magnetic head 1 shown in FIG. 3 or FIG.
In order to take measures to improve the CSS resistance, chamfering is performed on the edge of the slider 2 or the magnetic head core 4 and chamfering is also performed on the track 6 so that the width of the track 6 can be reduced. Although the dimension W could be shortened, in the floating magnetic head 1 of the present invention, the magnetic head core 4 is configured to protrude from the slider 2, and the slider 2 is chamfered independently of the magnetic head core 4. Therefore, the problem of the floating magnetic head 1 shown in FIG. 3 or 4 can be avoided.

In this embodiment, the magnetic head core 4 having a predetermined width protrudes so as to be aligned with the rail 11, but the size of the protruding portion is as short as 6 μm, and the magnetic head core 4 is close to the air inflow end 13b of the magnetic head core 4. Air outflow end 13a side and track width W
Since the slider 21 and the opposite side 21 are C-chamfered, the area protruding from the rails 11 and 12 is very small, and the surface is formed only at an obtuse angle with respect to the medium facing surface. Does not adversely affect CSS properties.

[0019]

Since the present invention is a floating magnetic head constructed as described above, the slider is provided with a head core projecting from the slider.
The chamfering of the surface side edge portion can be achieved without reducing the width dimension of the track portion of the head core . Furthermore, the slider
Exposure excluding the joint with the head core at the edge of
Since the portion is chamfered, the magnetic recording medium is not damaged by the edge even when the CSS operation is performed. Therefore, the CSS resistance can be improved without hindering the securing of the track portion having an appropriate width dimension .

[Brief description of the drawings]

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

FIG. 2 is a partially enlarged view of FIG.

FIG. 3 is a perspective view showing an example of a conventional floating magnetic head.

FIG. 4 is a perspective view showing another example of a conventional floating magnetic head.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Floating magnetic head 2 Slider 4 Magnetic head core 6 Track part 9 Edge part 11 Rail 12 Rail 14 Recording / reproducing gap 20 Opposing part

────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Kazutoshi Takayanagi 174-1-1, Asana-machi, Asaba-cho, Iwata-gun, Shizuoka Prefecture Minebea Co., Ltd. Development Technology Center (56) References JP-A-2-236812 (JP, A) JP-A-62-165724 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) G11B 5/60 G11B 5/127

Claims (1)

(57) [Claims] 1. A magnetic recording device comprising a substantially rectangular nonmagnetic material.
A rail for generating levitation force on the surface facing the recording medium
And a head with a recording / playback gap.
A floating magnetic head integrated with a slider , wherein the head core is bonded to a side surface of the slider, and a side of the head core opposite to a bonding surface with the slider.
Slope near the rail surface of the slider on the surface
And the thickness of the part exposed on the rail surface
Head width at the edge of the slider.
Do not chamfer the exposed part except for the joint with
Floating magnetic head, characterized in that that.