JPS63275010A - Magnetic head for floppy disk and its manufacture - Google Patents

Abstract

PURPOSE:To guarantee the uniform quality without causing crack or inequality of bonding strength at the manufacture by making a magnetic core part and a slider part by the same material. CONSTITUTION:A read/write gap 16 is formed between a slider and read/write core 11 and a center core 13 to apply read/write with respect to the recording track on a floppy disk. Moreover, a couple of erasure gaps 17 are formed between an erasure core 12 and a center core 13, erasure action to both sides of the recording track on the floppy disk is executed to form a guard band. In this case, the slider and read/write core 11, a slider and erasure core 12, the center core 13 and the slider 14 are made of the ferrite of the same magnetic material. Thus, the bonding part between the magnetic core and the slider does not exist and a media-ware to the sliding floppy disk is made excellent.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic head and a method of manufacturing the same, and more particularly to a magnetic head for a floppy disk drive and a method of manufacturing the same.

[Conventional technology]

The magnetic head of floppy disk drives, which are used as external storage devices for computer systems, forms a magnetic core. The slider is formed by joining a magnetic material such as ferrite and a non-magnetic material such as ceramic to form the slider.

FIG. 3 is a perspective view showing an example of a conventional magnetic head for a floppy disk of this type. The magnetic hend 30 for a frosobee disk includes a continuous output/write core 31, an erase core 32, a center core 33, sliders 34 and 35, a read/write gap 36, and an erase gap 37. ing.

A magnetic core (read/IF included core 31,
The erasing core 32 and the center core 33) are made of a magnetic material such as ferrite, and are used as the floppy disk magnetic head 3 for a floppy disk that is a recording medium.
The sliders 34 and 35, which enable smooth sliding at zero, are made of a non-magnetic material such as ceramic.

When manufacturing such a magnetic head 30 for a floppy disk, first, a core block including a plurality of parts to become the read/write core 31 and a core block including a plurality of parts to become the erase core 32 are combined with a core block including a plurality of parts to become the center core 33. Multiple core blocks and read/write gaps 36
and an erase gap 37 is formed while bonding is performed using molten glass or the like.

Next, from the core blocks joined in this way, 1
A core chip is produced by slicing (cutting) a magnetic core for two floppy disk magnetic heads 30, including portions that will become a read/write core 31, an erase core 32, and a center core 33.

Furthermore, this core chip (made of magnetic material such as ferrite) and a slider 3 made of non-magnetic material such as ceramic
4 and 35 are joined by a method using an organic adhesive or a method using molten inorganic glass, and the third
A magnetic hand 30 for a flow disk as shown in the figure is manufactured.

[Problem that the invention seeks to solve]

In the above-mentioned conventional magnetic head for floppy disks, the sliding surface against the floppy disk, which is a recording medium, is composed of a magnetic material such as ferrite and a non-magnetic material such as ceramic. It has the disadvantage of being disadvantageous in terms of compatibility with recording media.

In addition, in the manufacturing method of such magnetic heads for floppy disks, there is an assembly process for the magnetic core part made of ferrite etc. and the slider part made of ceramic etc., so when bonding the two parts, there is a process of assembling the magnetic core part made of ferrite etc. This method has the disadvantage that cranking of joints and uneven joint strength are likely to occur, making it impossible to manufacture magnetic heads for floppy disks of uniform quality.

In view of the above-mentioned points, an object of the present invention is to provide a monolithic type floppy disk magnetic head which is superior in terms of media ware, and which ensures uniform quality without producing irregularities in cranking or bonding strength during manufacturing. Our goal is to provide the following.

Another object of the present invention is that the assembly process of the magnetic core part and the slider part can be omitted, and defects in the crank and joint strength of the joint part of the magnetic head for a floppy disk to be manufactured that occur in the assembly process can be omitted. An object of the present invention is to provide a method for manufacturing a magnetic head for a floppy disk that does not cause unevenness.

[Means for solving problems]

The magnetic head for a floppy disk of the present invention has a read/write core made of a magnetic material such as 7-elite which also functions as a slider, and a read/write core made of a magnetic material such as ferrite which also functions as a slider. and a slider formed of the same magnetic material as the magnetic material forming the read/write core and the erase core.

In addition, the method for manufacturing a magnetic head for a floppy disk of the present invention involves joining together core blocks made of a single magnetic material such as ferrite and having a portion that will become a slider, and creating a read/write gap and an erase gap at the joint. A step of cutting the joined core block in this step to a predetermined width to form a core chip having a portion that will become a slider, and cutting and eta processing the core chip obtained in this step to obtain the desired shape. forming the shape of the magnetic core.

[Effect]

In the magnetic head for floppy disks of the present invention, the read/write core is made of a magnetic material such as ferrite and functions as a slider, and the erase core is made of a magnetic material such as ferrite and functions as a slider. The slider is made of the same magnetic material that forms the read/write core and the erase core.

In addition, in the method of manufacturing a magnetic head for a floppy disk of the present invention, core blocks made of a single magnetic material such as ferrite are bonded to each other and have a portion that becomes a slider, and a write gap and an erase gap are formed one after another at the bonded portion. The joined core block is then cut to a predetermined width to form a core chip having a portion that will become a slider, and the core chip is cut and polished to form a desired magnetic core shape.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 (al is a perspective view showing a magnetic head for a floppy disk according to an embodiment of the present invention.1) The magnetic head IO for a floppy disk of this embodiment has a read/write core 11 that also serves as a slider, and a read/write core 11 that also serves as a slider. It includes an erasing core 12, a center core 13, a slider 14, and a notch 15.

Slider/read/write core 11. The slider/erase core 12, the center core 13, and the slider 14 are made of the same magnetic material, ferrite. As a result, there is no joining part between the magnetic core part and the slider part, and the mediaware for the floppy disk that slides into contact is excellent.

A magnetic head lO for a floppy disk shown in Fig. 1
Referring to the front view of the floppy disk, a read/write gap 16 is formed between the slider/read/write core 11 and the center core 13. A read/write operation is performed on the recording track.

Furthermore, a pair of erase gaps 17 are formed between the erase core 12 and the center core 13, and these erase gaps 17 existing in the magnetic path perform an erase operation on both sides of the recording track on the floppy disk. to form a guard band.

Next, a method of manufacturing the magnetic head for a floppy disk of this embodiment configured as described above will be explained.

First, as shown in FIG. 2 1al, a center magnetic core block 23 made of ferrite and side magnetic core blocks 21 and 22 made of ferrite on both sides thereof are prepared. A groove 24 (see the peak in FIG. 2) filled with a non-magnetic material (glass material, etc.) for forming the read/write gap 16 is formed on the inner surface of one side magnetic core block 21. .

Further, on the inner surface side of the other side magnetic core block 22, a groove 25 filled with a non-magnetic material for forming the erase gap 17 (see the peak in FIG. 2) is formed. Note that in the portions of the side magnetic core blocks 21 and 22 that become the slider 14 (including the notch 15), no gap is formed at the joint with the center magnetic core block 23 for read/write operations or erase operations. In order to do this, grooves 26 and 27 (see FIGS. 2-) filled with a non-magnetic material are formed to a depth deeper than the gap dibs of the succession/write gap 16 and the erase gap 17.

Next, the side magnetic core blocks 21 and 22 are fused and joined to both sides of the center magnetic core block 23 using molten glass or the like. Further, in the process, a read/write gap 16 and an erase gap 17 having a predetermined gap width are formed.

FIG. 2(b) shows a portion corresponding to one floppy disk magnetic head 10 in the core block (side magnetic core blocks 21 and 22 and center magnetic core block 23) to which such joining is performed. FIG. The joined core block is sliced into a width unit shown in FIG. 2, 10), to obtain a core chip 20 as shown in FIG. 2, 10).
- This core chip 20 is cut out from the core chip rear surface 20b side by a portion shown by a chain line in FIG. 2 1dl, and further by a portion shown by a chain double-dot line in FIG.

Finally, a cutting process is performed to form a notch 15 shown by a broken line in FIG. 2(C) on the core chip surface 20a of the core chip 20 shown in FIG. 2(C1), and the core chip including other parts is The surface 20a is polished, and the floppy disk magnetic head 10 as shown in xV!i (al and mountain) is manufactured.

〔Effect of the invention〕

As explained above, according to the magnetic head for a floppy disk of the present invention, since the magnetic core portion and the slider portion are made of the same material (magnetic material such as ferrite), the sliding surface against the floppy disk is smooth. Improved media ware can be achieved based on the fact that it is composed only of magnetic materials such as ferrite, and there is no joint between the magnetic core part and the slider part (therefore, problems such as cranking and uneven joint strength caused by the joint) can be achieved. This has the effect of producing products of uniform quality.

Further, according to the method for manufacturing a magnetic head for a floppy disk of the present invention, the main part of the magnetic head for a floppy disk can be manufactured using a single material, so the assembly process of the core chip (magnetic core part) and the slider part can be omitted. There is an effect.

In addition, since the assembly process can be omitted, as mentioned earlier, there is no cracking of the joints during bonding due to differences in expansion coefficients, uneven strength of the joints, etc., and the quality of the floppy disk is uniform. This has the advantage that a magnetic head for use can be manufactured.

[Brief explanation of the drawing]

FIG. 1 (al is a perspective view showing a magnetic head for a floppy disk according to an embodiment of the present invention, FIG. 1-) is a front view of the magnetic head for a floppy disk shown in FIG. 1 (al), FIG. al~(d+ is a perspective view showing the steps of the method for manufacturing the magnetic head for a floppy disk shown in FIG. 1 (al and y), and FIG. 3 is a perspective view showing an example of a conventional magnetic head for a floppy disk. In the figure, 10... magnetic head for floppy disk, 11...
・Read/write core that also serves as a slider, 12... Erase core that also serves as a slider, 13... Center core, 14... Slider, 15... Notch, 16... Continuation/write gap, 17... Erase gap, 20... Core chip, 20a... Core chip surface, 20b... Core chip back surface, 21, 22, Side magnetic core block, 23... Center magnetic core block, 24-27, Groove.

Claims (2)

[Claims] (1) A read/write core made of a magnetic material such as ferrite and which also functions as a slider; an erase core made of a magnetic material such as ferrite and which also functions as a slider; A magnetic head for a floppy disk, comprising: a slider made of the same magnetic material as the write core and the erase core. (2) A step of joining together core blocks made of a single magnetic material such as ferrite and having a portion that will become a slider, and forming a read/write gap and an erase gap at the joint, and the cores joined by this step. A step of cutting the block to a predetermined width to form a core chip having a portion that will become a slider, and a step of cutting and polishing the core chip obtained in this step to form a desired magnetic core shape. A method of manufacturing a magnetic head for a floppy disk, the method comprising: