JPH08339584A - Magnetic head for magneto-optical recording and its production - Google Patents

Abstract

PURPOSE: To obtain a magnetic head for magneto-optical recording with which the lowering of head inductance can be embodied without deteriorating the perpendicular magnetic field intensity and mechanical strength of the magnetic head for magneto-optical recording, and a process for producing this magnetic head. CONSTITUTION: 'SENDUST (R)' 2 which is a high saturation magnetic flux density material is adhered via a glass 6 to both ends of a pair of magnetic poles to generate perpendicular magnetic fields of a base core 1 and is fused and fixed with a glass to a slider 5 having a pair of floating surfaces 4a, 4b which receive the floating power generated by rotation of a magneto-optical disk. Then, the mass production of the U-shaped cores of the magnetic head for magneto-optical recording is made executable stably in mechanical strength. The lowering of the inductance is made possible, thereby, the increase in the recording capacity of the magneto-optical disk device can be embodied.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic field modulation type magneto-optical recording disk device for recording / reproducing in computer peripherals and for audio playing, and a method of manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, a magnetic field modulation type magnetic head for magneto-optical recording has a lift generated by rotation of a magneto-optical disk through a core made of an oxide magnetic material and a magnetic gap made of a non-magnetic material such as glass. The slider is fixed to a slider having a pair of air bearing surfaces for receiving. A coil wire is wound around a core made of an oxide magnetic material, and a high-frequency current is passed through the coil wire to generate a reversal magnetic field from the sliding surface of the core with the magneto-optical disk corresponding to the high-frequency current.

A magnetic gap made of a non-magnetic material such as glass has a width of about 100 μm, which is widely formed for a magnetic head for a fixed magnetic disk in order to generate a high perpendicular magnetic field, and a high eddy current loss material such as copper. Is fixed in a magnetic gap made of a non-magnetic material such as glass to obtain a high perpendicular magnetic field.

Further, in the conventional method of manufacturing a magnetic head for magneto-optical recording, after a core material made of an oxide magnetic material and a slider material are bonded in the process of forming a magnetic gap made of a non-magnetic material,
The core is processed to generate a vertical magnetic field.

In recent years, the recording capacity of the magnetic field modulation type magneto-optical disk device has been increasing, and the recording magnetic head is required to have a high frequency current in a high frequency band. Therefore, in the magnetic head for magneto-optical recording, the high frequency current becomes high in the conventional head inductance, so that the high frequency current becomes dull.
Since the vertical magnetic field strength generated from the sliding surface of the magneto-optical disk having the core made of an oxide magnetic material is reduced, it is necessary to reduce the inductance.

[0006]

In order to reduce the inductance of the magneto-optical recording magnetic head, it is possible to increase the magnetic permeability of the core material of the magnetic head and the magnetic resistance of the magnetic head. Become. In order to increase the magnetic resistance of the magnetic head for magneto-optical recording, it is possible to make the core thin or small.

However, in the conventional magnetic head for magneto-optical recording, in order to reduce the inductance, thinning the core made of an oxide magnetic material lowers the inductance. However, by thinning the core, the magneto-optical disk of the core is reduced. The strength of the vertical magnetic field generated from the sliding surface is reduced. In addition, thinning the core causes a problem that the mechanical strength of the core is reduced.

Therefore, the present invention provides a magnetic head for magneto-optical recording and a method for manufacturing the same, which can reduce the head inductance without deteriorating the perpendicular magnetic field strength and mechanical strength of the magnetic head for magneto-optical recording. To aim.

[0009]

To this end, the magnetic head for magneto-optical recording according to the present invention has a U-shaped base core made of an oxide magnetic material, which is provided at both ends of a pair of magnetic poles for generating a vertical magnetic field. A high-saturation magnetic flux density material, such as sendust, was vapor-deposited by sputtering, and was fused and fixed to glass on a slider having a pair of air bearing surfaces that receive lift generated by the rotation of the magneto-optical disk.

Also, after depositing sendust, which is a high saturation magnetic flux density material, on both end faces of the bar material made of oxide magnetic material by sputtering, grooving is performed in the longitudinal direction of the bar material, and then slicing processing is performed. This was done to form a U-shaped core.

[0011]

With the above structure, even if the core is thinned and downsized in order to reduce the inductance, if the high frequency current value is increased, the vertical magnetic field strength generated by the sendust of the high saturation magnetic flux density material is reduced. It becomes possible to prevent it. Further, since the slider having a pair of air bearing surfaces that receives lift generated by the rotation of the magneto-optical disk is fused and fixed with glass, the mechanical strength of the core that generates the vertical magnetic field is secured, The core can be made thinner and smaller.

According to the above manufacturing method, U in the manufacturing process is increased.
It is possible to reduce the processing load on the V-shaped core and manufacture a core with stable mechanical strength.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a magnetic head for magneto-optical recording according to an embodiment of the present invention, and FIG. 2 is an enlarged perspective view of a U-shaped core that generates a vertical magnetic field of the magnetic head for magneto-optical recording.

In FIG. 1, 1 is a base core made of an oxide magnetic material, 2 is sendust which is a high magnetic flux density material, and the high magnetic flux density material is provided on both end faces of the magnetic poles 3a and 3b which generate a vertical magnetic field of the base core 1. The sendust 2 is deposited by sputtering to form a U-shaped core shown in the enlarged perspective view of FIG. The U-shaped core is fused and fixed with glass 6 to a slider 5 having a pair of air bearing surfaces 4a and 4b which receives a lift generated by the rotation of the magneto-optical disk, and constitutes a magnetic head for magneto-optical recording. A coil wire 7 is wound around the U-shaped core, and when a high frequency current is passed through the coil wire 7, a vertical magnetic field is generated from the magnetic poles 3a and 3b of the U-shaped core.

As described above, sendust 2 of a high magnetic flux density material is vapor-deposited on both end surfaces of the magnetic poles 3a, 3b for generating the vertical magnetic field of the base core 1 by sputtering to form a U-shaped core, thereby reducing the inductance. Therefore, even if the U-shaped core is thinned and downsized, if the high-frequency current value flowing in the coil wire 7 is increased, it is generated from the sendust 2 of the high magnetic flux density material, so that the vertical magnetic field strength is prevented from lowering. It becomes possible. Further, by adopting a structure in which the U-shaped core is held and fixed to the slider 5 having the air bearing surfaces 4a and 4b by the glass 6, the U-shaped core is thin to achieve low inductance.
Even if the size is reduced, it is possible to prevent the mechanical strength of the U-shaped core from lowering.

Next, a method of manufacturing the magnetic head for magneto-optical recording of the present invention will be described. FIG. 3 is a manufacturing process diagram of a magnetic head for magneto-optical recording according to an embodiment of the present invention. In FIG. 3, 8 is a bar material made of an oxide magnetic material, and sendust 2 of a high saturation magnetic flux density material is formed by vapor deposition on both end surfaces 9a, 9b in the longitudinal direction by sputtering. Next, grooves 10 are formed in the longitudinal direction of the bar material 8 on which the sendust 2 is deposited by sputtering. After that, the bar material 8 is sliced in the lateral direction to form a U-shaped core.

By thus forming the groove in the bar state, when forming the magnetic pole of the U-shaped core, the processing load on the magnetic pole can be reduced, and the core is not impaired in mechanical strength. It is possible to reduce the thickness and size. In addition, it is possible to stably manufacture a large number of U-shaped cores by performing slicing after grooving in the bar state.

[0018]

According to the present invention, the inductance of the magnetic head for magneto-optical recording can be reduced, and the recording capacity of the magneto-optical disk device can be increased.

Also, after depositing sendust of a high saturation magnetic flux density material on both end surfaces of the bar material made of an oxide magnetic material by sputtering, grooving is performed in the longitudinal direction of the bar material, and then slicing processing is performed. By performing the process to form the U-shaped core, it becomes possible to manufacture a large amount of the U-shaped core which is stable in mechanical strength.

[Brief description of drawings]

FIG. 1 is a perspective view of a magnetic head for magneto-optical recording according to an embodiment of the present invention.

FIG. 2 is an enlarged perspective view of a U-shaped core that generates a vertical magnetic field of a magnetic head for magneto-optical recording according to an embodiment of the present invention.

FIG. 3 is a manufacturing process diagram of a magnetic head for magneto-optical recording according to an embodiment of the present invention.

[Explanation of symbols]

 1 base core 2 sendust 3a, 3b magnetic poles 4a, 4b air bearing surface 5 slider 6 glass 7 coil wire 8 bar material 9a, 9b longitudinal end surface of bar material 10 groove

Claims (2)

[Claims] 1. A magnetic field modulation type magneto-optical recording head which levitates a lift force generated by the rotation of a magneto-optical disk which is a recording medium and which is a U-shaped base core made of an oxide magnetic material. The pair of magnetic poles that generate a vertical magnetic field is formed by vapor deposition of sendust, which is a high saturation magnetic flux density material, on both ends of the pair of magnetic poles. A magnetic head for magneto-optical recording characterized by being fused and fixed. 2. A bar material made of an oxide magnetic material is vapor-deposited on both end surfaces of sendust of a high saturation magnetic flux density material by sputtering, and then groove processing is performed in the longitudinal direction of the bar material, followed by slicing processing. Is performed to form a U-shaped core.