JPS621106A - Magnetic head - Google Patents

Abstract

PURPOSE:To form a track hole having a good vertical sectional shape, in which no molten recoagulated matter is left in the inside by using a laser track working method, by forming grooves on the side face of the lower part of the apex tip of a core block of the side opposed to a core block having an apex angle, by placing a magnetic gap of a magnetic head between them. CONSTITUTION:A track hole 1 determines an effective track width for read and write, and a track hole 2 determines an effective track width for erasion. A core block 3 has an apex of a read-write side and a core block 4 is opposed to the core block 3. A core block 5 has an apex of an erasion side and a core block 6 is opposed to the core block 5. A groove 7 is provided especially for a laser track working. In a part C of a floppy head for this laser track working, a groove 19 for working is provided on a little lower part of a tip 20 of the apex. In a section of the track hole which has been worked, a groove 22 for the laser track working is formed, by which the track hole having a good vertical sectional shape is formed.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a magnetic head.

BACKGROUND OF THE INVENTION In recent years, laser beam processing has been applied to track processing in order to accommodate higher density magnetic recording heads.

An example of the above-mentioned conventional laser track processed magnetic head will be described below with reference to the drawings. FIG. 2 shows a conventional magnetic head machined with laser tracks, and FIG. 3 is a cross-sectional view of a track hole machined with a laser beam. In Figure 2, 1
0 is the core block on the side with the apex angle, 11 is the core block facing the core block on the side with the apex angle with a magnetic gap in between, 12 is the track hole machined with a laser beam, and 13 is the magnetic In the gap, 14 is a laser beam, 16 is a laser beam,
This is a condensing lens for use. In FIG. 3, 16 is a magnetic gap, 17 is an apex angle, and 18 is a cross section of a track hole drilled with a laser beam.

The gap doper of the magnetic head constructed as described above is placed on a movable table (not shown) of a laser processing machine, and track holes 12 are sequentially machined.

Problems to be Solved by the Invention However, in the above configuration, although it is possible to easily make a through hole in the magnetic block 1o on the side having the apex angle, it is difficult to form a through hole in the magnetic block 1o on the side having the apex with a magnetic gap in between. It is not possible to make a through hole in the magnetic block 11 as shown in FIG. Therefore, the track hole 18 is clogged with melted and re-solidified material of the magnetic material generated by the laser beam generated from the magnetic material block 11, and it takes a relatively long processing time to completely remove such melted and re-solidified material. There was a problem.

In view of the above problems, the present invention provides a magnetic head shape suitable for laser track processing.

Means for Solving the Problems In order to solve the above problems, the magnetic head for laser track processing of the present invention has a core block on the side opposite to the core block having an apex angle across the magnetic gap of the magnetic head. It has a structure in which the groove is deeper than the gap depth.

Effect: With the above-described configuration, the present invention can easily penetrate not only the core block on the side having the apex but also the core block facing the side having the apex with a magnetic gap in between, when laser track processing is performed on a magnetic head. It is possible to drill holes.

EXAMPLE Hereinafter, a floppy head for laser track processing which is an example of the present invention will be described with reference to the drawings.

FIG. 1 shows laser track processing of a floppy head in an embodiment of the present invention.

In FIG. 1, 1 is a track hole that determines the effective track width for reading and writing, and 2 is a track hole that determines the effective track width for erasing.

3 is a core block having a read/write side apex, and 4 is a core block opposite to the core block 3. 6 is a core block having an erase side apex, and 6 is a core block opposite to the core block 6. 7 is a groove specially provided for laser track processing. 8 is a laser beam, and 9 is a condensing lens.

The floppy head for laser track processing constructed as above will be described in detail below with reference to FIGS. 4 and 5.

First, FIG. 4 is an enlarged view of section C in FIG. 1, and the groove 19 for laser track processing is provided slightly below the tip 2o of the apex. FIG. 5 shows a cross section of the track hole after laser track processing. A21 is a track hole, and 22 is a groove for laser track processing. It can be seen that by forming the groove, a track hole with a good longitudinal cross-sectional shape is formed.

As described above, according to this embodiment, by forming grooves in the core block that faces the core block having the apex on the reading/writing side and the erasing side and facing each other across the magnetic gap, the core block is melted and reused internally. Track holes with good shapes and no residual coagulation can be formed in a relatively short time.

Effects of the Invention As described above, the present invention provides a laser track by forming a groove on the side surface below the apex tip of the core block on the side opposite to the core block having the apex angle across the magnetic gap of the magnetic head. By using the processing method, it becomes possible to form a track hole with a good longitudinal cross-sectional shape in a relatively short time without leaving any melted and re-solidified material inside.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a floppy head gap doper for laser track processing according to the first embodiment of the present invention, and FIG. 2 is a perspective view showing a conventional magnetic head processed by the laser track processing method. Figure 3 shows Figure 2 A-A'
4 is an enlarged view of section C in FIG. 1, and FIG. 5 is a longitudinal sectional view of the magnetic head for laser track processing after processing. 1...Track hole on read/write side, 2
...Track hole on erase side, 3...Magnetic block having apex on read/write side, 4...Magnetic block opposite to 3, 5...
・・・Magnetic block with erase side apex,
6... Magnetic block facing mark 6, 7...
- Groove for laser track processing, 8... Laser beam, 9... Condensing lens. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
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Claims (1)

[Claims] A magnetic head having a groove in a portion deeper than the gap depth of a core block on the side opposite to a core block having an apex angle across a magnetic gap of the magnetic head.