JPH0580725B2 - - Google Patents

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 come to be applied to track processing in order to accommodate even 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 a laser track, and FIG. 3 is a cross-sectional view of a track hole machined with a laser beam. In FIG. 2, 10 is the core block on the side with the apex angle, 11 is the core block opposite to 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 core block on the side with the apex angle. is a magnetic gap, 14 is a laser beam, and 15 is a condensing lens for the laser beam. In FIG. 3, 16 is a magnetic gap, 17 is an apex angle, and 18 is a cross section of a track hole machined with a laser beam.

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

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 10 on the side having the apex angle, it is difficult to make a through hole in the magnetic block 10 on the side having the apex angle. It is not possible to make a through hole in the magnetic block 11 as shown in FIG. Therefore, magnetic block 1
There is a problem in that the melted and re-solidified material of the magnetic material generated by the laser beam generated from 1 clogs the inside of the track hole 18, and that it takes a relatively long time to completely remove such melted and re-solidified material. Ta.

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 gap depth of the 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 with grooves in the deeper part.

Effects The present invention has the above-described structure, so that during laser track processing of a magnetic head, it is possible to 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. It is possible to drill holes.

Embodiment A floppy head for laser track processing which is an embodiment of the present invention will be described below 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. 5 is a core block having an erase side apex, and 6 is a core block opposite to the core block 5. 7 is a groove specially provided for laser track processing. 8
9 is a laser beam, and 9 is a condensing lens.

The floppy head for laser track processing constructed as described above will be explained 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 20 of the apex. FIG. 5 shows a cross section of the track hole after laser track processing. 21 is a track hole, and 22 is a groove for laser track processing. It can be seen that by forming the grooves, a track hole with a good longitudinal cross-sectional shape is formed.

As described above, according to this embodiment, by forming a groove in the core block that faces the core block having the apex on the read/write side and the erase side with the magnetic gap in between, it is possible to melt and remelt the core block internally. Track holes of good shape without residual coagulum can be formed in a relatively short time.

Effects of the Invention As described above, the present invention provides a laser track processing method 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. Using this method, it becomes possible to form track holes with a good longitudinal cross-sectional shape in a relatively short time without leaving any melted and re-solidified material inside.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a floppy head gapped bar 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. , Fig. 3 is a cross-sectional view of Fig. 2 cut vertically along A-A', Fig. 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. It is. 1...Track hole on read/write side, 2
...Track hole on erase side, 3...Magnetic block with apex on read/write side, 4
...Magnetic block facing 3, 5...Magnetic block having an erase side apex, 6...5
7... a groove for laser track processing, 8... a laser beam, 9... a condensing lens.

Claims (1)

[Claims] 1. A magnetic head characterized by having a groove in a portion deeper than the gap depth of the core block on the side opposite to the core block having an apex angle across the magnetic gap of the magnetic head.