JPH0770033B2 - Magnetic head slider - Google Patents

Description

The present invention relates to a magnetic head slider for a magnetic disk device.

[Conventional technology]

A magnetic head slider used in a magnetic disk device has a structure in which a magnetic head for writing / reading a signal to / from a magnetic recording medium is incorporated into a slider that floats from the magnetic recording medium with a minute gap according to the principle of a dynamic pressure type air bearing. Among them, the so-called Winchester type magnetic head slider, which is constructed as a part of a magnetic circuit by using a magnetic material for the flying slider portion, is one of the most widely used magnetic head sliders at present. This conventional Winchester type magnetic head slider is a magnetic core member for forming an annular magnetic circuit in the floating slider portion 10 as shown in FIGS. 4 (a), 4 (b) and 4 (C). The coil 20 is formed in a U shape and is vertically arranged at the rearmost portion of the floating slider portion 10, and an electric wire is wound around this to form a coil 30.

The magnetic disk device is in the direction of miniaturization and high density, and the diameter of the mounted magnetic disk is 14 inches to 8 inches.
The size has been reduced to inches, 5.25 inches, and even 3.5 inches. As a result, the size of the magnetic head slider is
L, W and H shown in Figures (a) to (c) are initially L = 5.6 mm, W = 3.
The size has been reduced from 9 mm, H = 1.9 mm to L = 4.1 mm, W = 3.2 mm, H = 1.0 mm. However, the above-mentioned 3.5-inch disk is still too large for the miniaturized magnetic head slider, and further miniaturization is desired.

[Problems to be solved by the invention]

In response to the above-described requirements, the conventional magnetic head slider has the magnetic core member 20 forming the coil 30 and the magnetic core member 20 forming the coil 30 arranged vertically as described above. Therefore, it is necessary to secure a space for forming the coil 30. There is a limit in reducing the height dimension (H). That is, in the conventional magnetic head slider, H is limited to about 0.8 mm, which has been an obstacle to miniaturization of the length (L) and the width (W). If H is left unchanged and L and W are made smaller, the slider is supported at a position considerably distant from the center of gravity in the height direction due to the aspect ratio, which is mechanically extremely unbalanced. Become.

Therefore, it is an object of the present invention to provide a magnetic head slider suitable for further miniaturization.

[Means for solving problems]

In order to solve the above problems, the magnetic head slider of the present invention is made of a magnetic material, and air bearing surface rails are provided along the first end edge and the second end edge, respectively. And a magnetic member having a step on the side of the air bearing surface rail, which is formed of a magnetic material and has both ends joined to both ends of the third edge of the floating slider part. A core member and the magnetic core member are provided,
One of two joining portions joining the floating slider portion and the magnetic core member, including a coil that passes through an opening formed by the concave portion of the floating slider portion and the magnetic core member, one of which is recording / reproducing. It is characterized in that it is formed in the gap and the other is formed apart from the air bearing surface of the air bearing surface rail.

〔Example〕

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows an embodiment of the present invention. FIG. 1a is a side view, FIG. 1b is a front view, and FIG. 1c is a plan view.

The magnetic head slider has two air bearing surface rails 11 and 12
And a magnetic core member 20 disposed in parallel with the two air bearing surface rails 11 and 12, and a coil 30 wound around the magnetic core member 20.

The floating slider portion 10 and the magnetic core member 20 were made of ferrite by grinding. Magnetic core member of the floating slider section 10
A groove 13 is formed between the air bearing surface rail 11 and the air bearing surface rail 12 on the 20 side. Further, the magnetic core member 20 has a hook-like shape as shown in FIG. 1 and further has a groove 28 formed therein. The floating slider portion 10 and the magnetic core member 20 were joined by glass welding. When the coil 30 is wound around the magnetic core member 20, an annular magnetic circuit is formed which passes from the magnetic core member 20 to the floating slider 10 air bearing surface rail 11 side and then returns from the air bearing surface rail 12 side to the magnetic core member 10 again. Further, the bonding surface on the side of the air bearing surface rail 12 is formed on the air bearing surface closest to the recording medium (not shown) and serves as a recording / reproducing gap 41. Also the air bearing surface rail
The joint surface on the 11th side is separated from the air bearing surface to form the back gap 42.

Since the magnetic head slider of this embodiment has the structure as described above, the coil 30 can be formed laterally. For this reason, the dimension W that is always larger than the dimension H
The magnetic head slider can be used as a forming portion of the magnetic head slider 30, and the entire magnetic head slider can be miniaturized.

Next, a method of manufacturing the magnetic head slider described above will be described with reference to FIGS.

In FIG. 2, the magnetic head slider according to the present embodiment has a continuous block 19 of a floating slider portion in which a groove 13 has been previously formed by grinding, and a continuous block 19 similarly formed by grinding.
Continuity 29 of magnetic core members having two grooves 25, 26 and 28
Can be manufactured by joining by glass welding. After welding the glass, cut it from the alternate long and short dash line 17,
The surface of 12 is formed by lapping, TW that is the recording track width is ground, and finally the width of the air bearing surface rails 11 and 12 is ground to complete a magnetic head slider as shown in FIG. All of the above steps are based on the already established manufacturing technology, and a small magnetic head slider can be manufactured at low cost.

〔The invention's effect〕

As described above, the magnetic head slider of the present invention is a magnetic head slider in which both the magnetic core member forming the coil and the floating slider portion are made of magnetic material, and the floating slider portion has two air bearing surface rails and its rear end portion. Is formed with a groove for separating the two air bearing surface rails, and the magnetic core member is joined so as to connect the two air bearing surface rails across the groove, so that the magnetic head slider can be miniaturized. is there.

[Brief description of drawings]

1 (a), (b) and (c) are side views, front views and plan views showing a magnetic head slider according to an embodiment of the present invention, and FIGS. 2 and 3 show the embodiment of the present invention. FIG. 4A, FIG. 4B, and FIG. 4C are side views, front views, and plan views showing a conventional magnetic head slider, showing a part of the manufacturing process of the magnetic head slider of the example. 10 …… Floating slider part, 11, 12 …… Ascending rail, 13…
… Groove, 20 …… Magnetic core member, 30 …… Coil.

Claims (1)

[Claims] 1. A first end edge and a second end formed of a magnetic material.
Air bearing surface rails are provided along the respective edges of the floating slider, and a floating slider portion in which a recess is formed in a part of the third edge; A magnetic core member that is joined to both ends of the edge and has a step on the air bearing surface rail side, and an opening formed in the magnetic core member and formed by the concave portion of the floating slider portion and the magnetic core member. A coil passing through the magnetic head, the floating slider portion and the magnetic core member being joined together.
A magnetic head slider, wherein one of the joining portions is formed in a recording / reproducing gap, and the other is formed apart from an air bearing surface of the air bearing surface rail.