JPS6173215A - Manufacture of chip for magnetic head - Google Patents

Abstract

PURPOSE:To mass-produce chips for upper side head and chips for lower side head of floppy disks in pairs, by symmetrically forming grooves for winding containing the joined section of the 1st and 2nd core blocks and slicing the joined blocks with an azimuth angle, and then, symmetrically dividing the sliced pieces. CONSTITUTION:The 2nd core block 2 is put between the 1st core block 1 and dummy block 3 and they are simultaneously joined together by using a joining agent, such as low melting point glass, bonding agent, etc. The dummy block 3 is provided with grooves 5B and 5D for winding symmetrically installed to the upper and lower sections and the 1st core block 1 is also provided with grooves 5A and 5C for winding symmetrically installed to the upper and lower sections in such a way that they can contact with each other at the 2nd core block 2 side. Then the joined blocks are sliced with an optional azimuth angle as shown by codes 12a, 12b... and the sliced pieces are symmetrically divided into upper and lower parts from a plane which becomes the sliding gap surfaces 6 of the upper and lower parts. Thus chips 8 for magnetic heads and chips whose azimuth directions are symmetrically set against the chips 8 are formed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method of manufacturing a chip for a magnetic head of a floppy disk or the like of an office computer or a personal computer.

[Conventional technology]

Recently, with the miniaturization of 81K recording and playback H positions, high window recording, and miniaturization of disks, the use of a small head increases the S/N.
is known to worsen. In order to solve this problem, it has been previously proposed to set an azimuth angle to the gap (Japanese Patent Application Laid-Open No. 57-186222, reference q).

Further, the floppy disk currently in use has an upper head 10 and a lower head 11 attached to both surfaces of the disk 9, as shown in FIG. Further, in this case, the angle directions of the azimuth caps of the upper head 10 and the lower head 11 need to be the same with respect to the rotational direction of the disk 9.

The present invention provides a chip for the upper head 10 and a chip for the lower head 1.
The present invention provides a chip manufacturing method suitable for mass production, in which chips for 1 can be manufactured bare.

〔Example〕

FIG. 1 is a diagram showing a method of manufacturing a magnetic head chip according to the present invention.

As shown in 1st G (a), a first core block l is made of magnetic material such as ferrite and is formed into a substantially Y-shaped cross section by skill, and a magnetic material such as ferrite is made of magnetic material such as ferrite, similar to the first core block l described above. A second core block 2 having a substantially square cross section and a dummy block 3 made of a nonmagnetic material such as ceramic and having a substantially U shape in cross section are prepared. These first core block 1, second core block 2, and dummy block 3 have symmetrical shapes. Next, as shown in FIG. 1(b), the second core block 2 is placed between the first core block l and the dummy block 3.
These are then simultaneously bonded using a bonding agent 4 such as low melting point glass or an adhesive. However, in order to form a gap between the first core block 1 and the second core block 2, sputtering or the like is performed before bonding to determine the gap length, or a spacer etc. is inserted during bonding to create a gap. determine the length. Next, the dummy block 3 has a winding groove 5B,
5D are provided vertically symmetrically, and the first core block l has a second
The winding grooves 5 are vertically symmetrical so as to be in contact with the core block 2 side.
After forming A and 5C, slice them at an arbitrary azimuth angle as shown in Fig. 1 (C) and as shown in symbols 12a, 12b, etc., and as shown in Fig. 1 (d). The chip 8 for a magnetic head shown in FIG. 1(e) is divided vertically symmetrically with respect to the upper and lower sliding gap surfaces 6 as boundaries, and this chip is a chip that is symmetrical in the azimuth direction (
(not shown) is completed. The reference numeral 7 in FIG. 1(e) is a gap, which becomes a recording/reproducing gap or an erasing cap depending on the track width.

In addition, in the embodiment of the present invention described above, the winding groove 5A.

After forming 5B, 5C, and 5D vertically symmetrically, slice them at an arbitrary azimuth angle to form upper and lower sliding gap surfaces 6.
Although the chip for the magnetic head was formed by vertically symmetrically dividing the magnetic head into two parts, as shown in FIG.
The first core block IA, the second core block 2A, the dummy block 3, the other second core block 2C, and the first core block IC are bonded using a bonding agent 4.
The core 70 pieces IA and Ic of 1 are provided with winding grooves 5A and 5E symmetrically so as to be in contact with the second core blocks 2A and 2C, and the dummy block 3 is also provided with winding grooves 5B and 5F symmetrically. . Next, in order to form the sliding gap surface 6, after removing the gap dibs and mirror-finishing the sliding gap surface 6, as shown in FIG. from the center of the dummy block 3, as shown in FIG. 1(g).
), the same li! as in the embodiment of the present invention shown in FIG. 1(e) is obtained. A chip for the air head and a chip (not shown) which is symmetrical in the azimuth direction with this chip can be formed. Moreover, the one shown in FIG. 1(h) is a vertically symmetrical structure of the one shown in FIG. 1(f), and includes a first A winding groove 5A formed in the core block IA, a winding groove 5B formed in the dummy block 3, and winding grooves 5E and 5F symmetrical to these winding grooves 5A and 5B are formed. Winding grooves 5C, 5D, 5G, and 5H are formed vertically symmetrically with 5A, 5B, 5E, and 5F.

When forming a chip from what is shown in FIG. 1(h) above, the dummy block 3 is divided symmetrically from the center and sliced at an arbitrary azimuth angle as shown in FIG. 1(C) above. As shown in FIG. 1(d), a magnetic hent tip can be formed by vertically symmetrical division.

Furthermore, the block shown in FIG. 1(h) is vertically symmetrically divided and sliced at an arbitrary anomalous angle as shown in FIG. 1(f), and the block shown in FIG. ), a magnetic hent tip can be formed by dividing it symmetrically.

As another method, a large number of magnetic head chips according to the embodiment of the present invention can be formed by slicing the material shown in FIG. 1(h) at an azimuth angle and then dividing it vertically and horizontally symmetrically. can.

Further, the winding grooves 5A and 5B of the above embodiment of the present invention.

5C and 5D are formed from the dummy block 3 and the first core block 1 [1 to the second core block 2].
Although the winding grooves 5A, 5B, 5C, and 5D are formed so as to be in contact with the sides, it is also possible to form the winding grooves including the joints of the first core block and the second core block. The same effects as in the embodiment can be obtained.

〔Effect of the invention〕

According to the present invention, the first core block 1, the second core block 2, and the dummy block 3 are made symmetrical, and the joint between the first core block 1 and the second core block 2 is made symmetrical. After forming the winding groove containing the winding groove or the winding groove in contact with the joint part symmetrically, slicing it at an angle of 7 nomas and dividing it symmetrically, the manufacturing process is easy and the upper head of the floppy disk can be manufactured easily. This has the advantage that more bare chips and lower head chips can be obtained than before.

[Brief explanation of drawings]

(a), (b), (c), and (d) in FIG. (e) is a perspective view showing the manufacturing process of a chip for a head in an embodiment of the present invention, and (f) and (g) in FIG.
, (h) are perspective views showing the manufacturing process of a magnetic head chip in another embodiment of the present invention, and FIG. 2 is a schematic diagram of a floppy disk.

Claims (1)

[Claims] A second core block made of a soft magnetic material is sandwiched between a first core block made of a soft magnetic material and a dummy block made of a non-magnetic material, and a gap is formed between the first core block and the second core block. After forming a portion, the first core block, the second core block, and the dummy block are joined, and a winding groove including the joint between the first core block and the second core block, or A method for manufacturing a chip for a magnetic head, comprising forming winding grooves symmetrically in contact with the joint, slicing at an azimuth angle, and then dividing and cutting symmetrically to form chips.