JPS62102406A - Vertical magnetic head - Google Patents

Abstract

PURPOSE:To improve magnetic characteristics as well as recording sensitivity and reproducing sensitivity and to make density higher by laminating an amorphous Co film on a non-magnetic layer as an intermediate layer. CONSTITUTION:Blocks 7 consisting of ferrite or non-magnetic material and thin non-magnetic sheets 8 are united to one body by glass adhering to manufacture a magnetic pole carrier 9. A surface 10 of the carrier 9 is finished to a specular surface and a groove 12 for a winding 11 is formed to the block 7. The non-magnetic film 14 having several tens Angstrom thickness is sandwiched by the amorphous Co alloy films 13 to form a main magnetic pole film 15 having 0.1-0.3mum thickness on the surface 10. The film 15 is finished to about several tens - several hundreds mum to form a magnetic pole 16. The other carrier 9 is joined and united to the above-mentioned carrier and the winding 11 is applied to complete the head. The main magnetic pole film 15 according to such constitution permits the reduction of the film thickness of the films 13 to an extra small thickness. The magnetic characteristics are improved when viewed from the structure of the magnetic domains thereof. The recording sensitivity and reproducing sensitivity are thereby improved and the higher density is attained.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a perpendicular magnetic head suitable for use in floppy disks, Winchester disk devices, magnetic tape devices, etc. as high-density magnetic memory devices.

BACKGROUND ART An example of the prior art will be described with reference to FIG. Although the illustrated one is a single magnetic pole type, a winding groove 3 is formed in a member 2 made of ferrite or a nonmagnetic material equipped with a nonmagnetic thin plate 1 to form a magnetic pole carrier 4, and these two An electrode 5 is formed between the magnetic pole carriers 4, and a winding 6 is wound in the winding groove 3 to form a perpendicular magnetic head.

Although various materials are used for the electrode 5, a Co-based amorphous single layer film is used as a high permeability magnetic material exhibiting high magnetic permeability.

The structure of this electrode 5 is the same in a ring head type perpendicular magnetic head.

Problems to be Solved by the Invention The electrode 5 uses a Co-based amorphous material as a high permeability magnetic material, but since its structure is a single layer film, the frequency characteristics deteriorate when the track becomes narrow. As a result, recording sensitivity and reproduction sensitivity are reduced, which is a major problem in increasing density.

Means for Solving the Problems The electrode structure includes a nonmagnetic layer such as SiO as an intermediate layer, and a Co-based amorphous laminated film is laminated on this nonmagnetic layer.

A working main pole film is a multi-layered Co layered with a non-magnetic intermediate layer.
Since the magnetic head is formed of an amorphous multilayer film, the magnetic properties are improved, and the recording sensitivity and reproduction sensitivity can be improved to 1 (good) even in a narrow track vertical magnetic head, making it possible to achieve higher density.

Embodiment A first embodiment of the present invention will be explained based on FIG. First, a block 7 made of ferrite or a non-magnetic material and a non-magnetic thin plate 8 are integrated by glass bonding to form a magnetic pole carrier 9.
form. Two magnetic pole carriers 9 are made, and each surface 10 is finished by mirror lapping.

The block 7 is formed with a winding groove 12 in which the winding 11 is wound.

The surface 1 of the magnetic pole carrier 9 formed in this way
A Co-based amorphous laminated film 13 made of a Co-based amorphous alloy, a nonmagnetic layer 14 (thickness of several tens of amps) made of SjO, and a Co-based amorphous laminated film 13 made of a CO-based amorphous alloy are sequentially laminated on the surface of the film by sputtering or the like. As a result, a main pole film 15 having a total film thickness of 0.1 to 0.3 μm is formed. The main magnetic pole film 15 is finished to have a width of about several tens to several hundred μm, and a magnetic pole 16 is formed. Then, the other magnetic pole carrier 9 is joined and integrated, and the winding 11 is wound to complete the process.

As a result of forming the main magnetic pole film 15 in this manner, the film thickness of the Co-based amorphous laminated film 13 becomes extremely thin, the magnetic properties are improved in terms of its magnetic domain structure, and the recording sensitivity and reproduction sensitivity are improved. High density can be achieved.

Next, what is shown in FIG. 2 is a second embodiment of the present invention, and the same parts as in the first embodiment described above are denoted by the same reference numerals, and explanations thereof will be omitted. This embodiment relates to a ring head type, in which a coil 18 is wound around a ferrite recoa 17 as a magnetic pole carrier formed in a ring shape, and a gear part nonmagnetic layer 19 is provided on the opposing surface. A non-magnetic layer 14 (thickness of several 1
0 people), the Co-based amorphous laminated film 13 made of a Co-based amorphous alloy is sequentially laminated to have a total film thickness of 0.1~
The main magnetic pole film 15 having a thickness of 0.3 μm is formed in two layers.

Therefore, the magnetic properties are improved as in the previous example,
Recording sensitivity and +I7 raw sensitivity are improved, making it possible to achieve higher density.

Effects of the Invention As described in 1-1, the present invention has a non-magnetic layer such as SiO□ as an intermediate layer and a CO-based amorphous laminated film is laminated on this non-magnetic layer to form a main magnetic pole film. Compared to a layered film head, the frequency characteristics are improved especially when the track is narrowed, recording sensitivity and reproduction sensitivity are improved, and high density can be achieved.

[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional side view showing the first embodiment of the present invention, and the second
The figure is a vertical side view showing a second embodiment of the present invention, and FIG. 3 is a vertical side view showing a conventional example. 8...Nonmagnetic thin plate, 13...Co-based amorphous laminated film, 14...Nonmagnetic layer (intermediate layer), 15...Main pole film Applicant: Tokyo Electric Co., Ltd. 3" Shiatsu Znu Jpa

Claims (1)

[Claims] A magnetic pole carrier with a non-magnetic thin plate that contacts the recording medium,
A perpendicular magnetic head characterized in that a main pole film is formed by laminating a Co-based amorphous laminated film on a non-magnetic layer such as SiO_2 as an intermediate layer.