JPH07220369A - Magnetic head and manufacturing method thereof - Google Patents

Abstract

PURPOSE:To obtain the magnetic head having fine contact performance with a magnetic recording medium and hardly scratching the magnetic recording medium, and also to obtain the manufacturing method thereof. CONSTITUTION:The magnetic head is constituted in such a manner that a slider 15 is mounted on only one side surface of a core chip 11 and C-chamfered part 19 is formed at a corner part of the side of the confronted surface 20 with the medium. The area of flat surfaces 18 formed on the surfaces 20, 21 confronted with the medium, which are divided by a groove 16, are made to almost the same.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic head used in a magnetic recording / reproducing apparatus and the like and a method of manufacturing the same.

[0002]

2. Description of the Related Art FIGS. 3 and 4 are a perspective view and a plan view showing a conventional magnetic head, respectively. 3 and 4,
1 is a core chip, and core chip 1 is a recording / reproducing core 2
And an erasing core 3 are joined via a non-magnetic body 4. 5 is a slider, and the slider 5 has a groove 6
Is provided. Further, the slider 5 is attached only to one side surface of the core chip 1, and the gap depth of the core chip 1 can be measured from the other side surface of the core chip 1.

Further, generally, as shown in FIG. 4, a chamfered portion 7 and a flat portion 8 are formed by chamfering an edge peripheral portion of the magnetic head on the medium facing surface side. By forming the chamfered portion 7 and the flat portion 8, it has been attempted to improve the contact property between the magnetic head and the magnetic recording medium (for example, a floppy disk) and extend the life of the magnetic head and the magnetic recording medium.

[0004]

However, in the above-mentioned conventional structure, the magnetic head is chamfered in order to improve the contact property between the magnetic head and the magnetic recording medium. I could get scratches.

The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a magnetic head which does not damage a magnetic recording medium or the like.

[0006]

To achieve this object, a magnetic head is provided with a groove formed along the sliding direction with the medium so as to divide the medium facing surface, and the magnetic head is divided by the groove. The areas of the flat portions of the medium facing surfaces were made substantially the same.

[0007]

With this structure, the contact areas of the medium facing surface divided by the groove with the medium can be equalized.

[0008]

1 and 2 are a perspective view and a plan view, respectively, showing a magnetic head according to an embodiment of the present invention.

1 and 2, reference numeral 11 denotes a core chip made of an oxide magnetic material such as ferrite. In the core chip 11, a recording / reproducing core 12 and an erasing core 13 are joined via a non-magnetic body 14. It is composed. Reference numeral 15 is a slider made of a non-magnetic material such as ceramic, and a groove 16 is provided in the slider 15. Further, the slider 15 is attached only to one side surface of the core chip 11, and the gap depth of the core chip 11 can be measured from the other side surface of the core chip 11.

Further, as shown in FIG. 2, a chamfered portion 17 and a flat portion 18 are formed by chamfering an edge peripheral portion of the magnetic head on the medium facing surface side. Reference numeral 19 is a C chamfer provided at a corner.

At this time, since the flat portions 18 of the medium facing surfaces 20 and 21 divided by the groove 16 are shown to be substantially equal to each other, the medium facing surface 2 is formed on the magnetic recording medium.
Since the flat portions 18 of 0 and 21 are evenly contacted with each other, it is difficult for the magnetic recording medium to be scratched. On the other hand, in the conventional magnetic head, as shown in FIG. 4, the area of the flat portion 8 (the area shown by diagonal lines) is different between the left and right, so that the magnetic head comes into contact with the magnetic recording medium with an unequal force. Therefore, the magnetic recording medium was scratched.

As described above, in this embodiment, the flat portion 1 of each of the medium facing surfaces 20 and 21 divided by the groove 16 is used.
By configuring the areas of 8 to be equal, the magnetic recording medium comes into contact with an even force.

In this embodiment, the medium facing surfaces 20, 2 are
Although the areas of the flat portions 18 of No. 1 are configured to be equal to each other, if the flat portions 18 are also formed to be mirror-symmetrical, the contact property with the medium becomes more uniform on the left and right, and the medium is more scratched. There is no.

Next, a method of manufacturing the magnetic head in one embodiment of the present invention will be described. First, the core chip 11
Is attached to one side surface of the slider 15, and a groove 16 is provided so as to equally divide the medium facing surface formed by the core chip 11 and the slider 15. Next, among the divided medium facing surfaces 20 and 21, C is applied to a corner of the medium facing surface 20.
A chamfer 19 is provided. Next, the medium facing surfaces 20 and 21 are subjected to polishing processing with a polishing tape or the like to form the chamfered portion 17 and the flat portion 18, respectively.

At this time, by changing the dimensions A, B and C of the C chamfered portion 19 shown in FIG. 2, the area of the flat portion 18 on the medium facing surface 20 side can be adjusted. That is,
The contact area between the polishing tape and the medium facing surface 20 varies depending on the size of the C chamfered portion 19, and as a result, the formation area of the flat portion 18 varies.

The reason why the C-chamfered portion 19 must be formed is that since the medium facing surface 20 and the medium facing surface 21 are made of different constituent materials, ferrite is more likely to wear than ceramic when polished under the same conditions. Therefore, the medium facing surface 21 has more chamfered portions 17, and the flat portion 1
The area of 8 becomes small. Therefore, based on the area of the flat portion 18 of the medium facing surface 21, the flat portion 1 of the medium facing surface 20 is used.
The C chamfered portion 19 is formed so that the area of 8 becomes the same as the flat portion 18 of the medium facing surface 21.

At this time, the C chamfered portion 19 is preferably provided at a corner portion. This is because by providing the C chamfered portion 19 at the corner, the flat portion 18 has substantially the same shape in the medium facing surface 20 and the medium facing surface 21.

[0018]

According to the present invention, the magnetic head is provided with a groove formed along the sliding direction with the medium so as to divide the medium facing surface, and the flat portion of each medium facing surface divided by the groove is formed. By making the areas substantially the same, the contact areas of the medium facing surface divided by the groove with the medium can be made equal, so that the contact with the medium is improved and the medium is not damaged.

[Brief description of drawings]

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

FIG. 2 is a plan view showing a magnetic head in one embodiment of the present invention.

FIG. 3 is a perspective view showing a conventional magnetic head.

FIG. 4 is a plan view showing a conventional magnetic head.

[Explanation of symbols]

 11 core chip 15 slider 16 groove 17 chamfered portion 18 flat portion 19 C chamfered portion 20, 21 medium facing surface

Claims (5)

[Claims] 1. A core chip for performing at least one of recording and reproduction, and a slider provided on only one side surface of the core chip, the gap depth can be measured from the other side surface of the core chip, and the medium facing the medium. A magnetic head having a chamfered portion at the corner on the surface side and a flat portion at the center of the medium facing surface, and further having a groove on the medium facing surface side along the sliding direction with the medium. A magnetic head characterized in that the areas of the flat portions of the divided medium facing surfaces are substantially the same. 2. A magnetic head according to claim 1, wherein the core chip is more easily worn than the slider. 3. A magnetic head according to claim 2, wherein a corner of the slider opposite to the side to which the core chip is attached is chamfered. 4. A core chip is attached to one side surface of a slider, a groove for dividing a medium facing surface formed by the slider and the core chip is provided, and the medium facing surface of the medium facing surface divided by the groove is less likely to wear. A method of manufacturing a magnetic head, characterized in that a corner of a surface is removed, and then the medium facing surface is polished to drop a corner of a peripheral edge of the medium facing surface. 5. A method of manufacturing a magnetic head according to claim 4, wherein a C-chamfer is applied to a corner of the medium facing surface on the side which is less likely to wear.