JPH0249281A - Manufacture of magnetic head - Google Patents

Abstract

PURPOSE:To stably hold the floating state of a magnetic head by grinding off the floating plane by grinding a part of the width of a prescribed part on a floating plane. CONSTITUTION:Lengthy rectangular floating planes 12a and 12b of a floating head are ground off by grinding a part of the width of sides 12a and 12b in a direction perpendicular to the moving direction of a medium from the side of the rear edge for the movement of the medium of the floating planes to the intermediate of the side in parallel with the side in a direction 13. Thereby, the width of the planes 12a and 12b are narrowered at the rear edge part compared with a front edge part, which reduces the minimum distance (h) between the medium plane and the head, and a pitch angle theta formed in a prescribed direction can be increased. As a result, it is possible to prevent the direction of the pitch angle from being reversed even when dust is interposed between the medium and the floating plane, or the projection of the medium is brought into contact with the floating plane, or the head is oscillated due to the change of the pitch angle, then, the magnetic head can be held at the floating state stably.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of manufacturing a magnetic head for writing or reading information signals to or from a magnetic medium of a magnetic disk device, which is an external storage device for an electronic computer.

[Conventional technology]

Conventionally, this type of magnetic head has, as shown in FIG. 3, an electromagnetic transducer 11 for writing or reading information signals on a medium, an air bearing surface 12a for keeping the transducer 11 afloat while keeping a small distance from the medium surface; I have 12b. Here, the air bearing surface 12a.

12b is a long rectangular plane in the direction of arrow 13 in the moving direction of the medium. Keep your distance.

[Problem to be solved by the invention]

The above-mentioned conventional magnetic head has been designed to reduce the force W pushing down on the medium surface 41 due to the recent demand for lower flying heights (that is, to further reduce the distance from the electromagnetic transducer or magnetic head floating above the medium surface). If it is made larger, the minute distance becomes smaller and the pitch angle θ shown in FIG.
will also become smaller. As a result, if dust in the air gets caught between the medium and the air bearing surface, or the air bearing surface comes into contact with a protrusion of the medium, and the magnetic head vibrates as the pitch angle θ changes, as shown in FIG. In addition, the pitch angle θ may be in the opposite direction to that shown in FIG.

In such a state, an attractive force acts between the medium surface 41 and the air bearing surfaces 12a and 12b due to the nature of the airflow accompanying the movement of the medium, and as a result of the contact between the medium and the magnetic head, writing is not performed on the medium. The disadvantage is that it can cause mechanical damage to the stored information.

[Means to solve the problem]

The manufacturing method of a magnetic head of the present invention includes an electromagnetic transducer for writing or reading an information signal on a magnetic medium, and a rectangular floating part that is long in the medium movement direction to levitate the transducer while maintaining a small distance from the surface of the medium. In the method for manufacturing a magnetic head having a surface, a part of the width of the air bearing surface in a direction perpendicular to the medium movement direction is parallel to the side in the medium movement direction from the side of the trailing edge of the air bearing surface with respect to the medium movement direction. The air bearing surface is ground down to the middle of the sides of the air bearing surface by grinding.

〔Example〕

FIG. 1 is a perspective view showing an embodiment of the present invention.

The electromagnetic converter 11 is the same as the conventional example, but the air bearing surface 12a
, 12b are symmetrically cut by grinding 14a, 1
There is 4b. According to this, the width of the floating surfaces 12a and 12b on the trailing edge side in the medium moving direction 13 is reduced, and not only can the floating surface be lowered with the same pressing force W as in the past, but also the width on the leading edge side is wider than that on the trailing edge side. The distance between the medium surface 41 and the air bearing surface can be increased. As a result, the pitch angle θ shown in Figure 4 becomes larger than in the conventional example, and dust in the air gets caught between the medium and the air bearing surface, or the protrusion of the medium comes into contact with the air bearing surface, causing the magnetic head to Even when vibration occurs due to a change in the pitch angle θ, the pitch angle θ does not become opposite to that in FIG. 4 as shown in FIG. 5, and a stable floating state can be maintained.

It is also possible to reduce the width of the trailing edge of the air bearing surface by grinding the outer side of the magnetic head as shown in FIG.

〔Effect of the invention〕

As explained above, by grinding the air bearing surface width of the trailing edge of the magnetic head air bearing surface with respect to the medium movement direction to make it smaller than that of the leading edge, the minimum distance between the medium surface and the magnetic head can be reduced, and the width of the magnetic head air bearing surface can be reduced. As a result of being able to increase the pitch angle, stability against vibrations in the pitch angle of the magnetic head increases, and a stable flying state of the magnetic head can be maintained.

Bonburibachi f1 shift direction

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the present invention, FIG. 2 is a perspective view showing another embodiment of the invention, FIG. 3 is a perspective view showing a conventional example, and FIG. 4 is a floating magnetic head. A side view showing the state, FIG. 5 is a side view showing a moment when the operation is unstable. 11... Electromagnetic conversion section, 12a, 12b...
...Flying surface, 41...Medium surface, 14a, 14b
・・・・・・Cut down. Agent: Susumu Uchihara, patent attorney Figure 2

Claims (1)

[Claims] A method for manufacturing a magnetic head having an electromagnetic transducer for writing or reading information signals on a magnetic medium, and a rectangular air bearing surface elongated in the medium movement direction for floating the transducer at a small distance from the surface of the medium, A portion of the width of the air bearing surface in the direction perpendicular to the medium movement direction from the side of the trailing edge of the air bearing surface relative to the medium movement, parallel to the side in the medium movement direction, to the middle of the side of the air bearing surface. . A method of manufacturing a magnetic head, characterized in that the air bearing surface is ground down by grinding.