JPS62165716A - Manufacture of magnetic head - Google Patents

Abstract

PURPOSE:To attain the highly densed structure for a magnetic recording and reproducing device by adopting a 2-split adhering structure comprising a gap from which a magnetic flux is introduced to the front and an exciting part of ring structure thereunder for a magnetic head. CONSTITUTION:Cut slots 2, 2 whose cross section is rectangular are made along the lengthwise direction of one face center of two slider blocks 1, 1 of rectangular form made of a nonmagnetic material and erasure core blocks 3,3 made of a high permeability magnetic material such as 'Sendust' whose cross section is a square rod are inserted to each of the cut slots 2, 2 of the blocks 1, 1 as free fit. Then the blocks 3, 3 is fixed to the blocks 1, 1 by melting a glass 4 and the surface of the blocks 1, 1 is ground until the size of the erasure gap is (d). Then a high melting point glass 6 including SiO2 or the like is subjected to sputter vapor deposition to one side of the butt face of the side edge face of to recording and reproducing core blocks 5, 5 of the high permeability magnetic material thin plate, they are butted to form a recording/reproducing gap 7 and the blocks 1, 1 are stuck to the both sides. Then the composite block 8 is sliced along the double-dotted chain line to obtain a composite core chip 9 of a prescribed thickness.

Description

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

[Conventional technology]

The conventional manufacturing method for this type of magnetic head is to cut out a recording/reproducing core, an erasing core, and a slider from each block, and then winding a recording/reproducing coil around the recording/reproducing core and an erasing coil around the erasing core. The erasing cores located at both ends of the gap were joined so as to be sandwiched from both sides of the recording/reproducing core, and the slider was further joined so as to be connected to the medium sliding surfaces of the recording/reproducing core and the erasing core.

[Problem that the invention seeks to solve]

However, in the above-mentioned conventional magnetic head manufacturing method, the recording/reproducing core, erasing core, and slider are cut out one by one from each block and then joined together, resulting in a significant drop in yield due to dimensional accuracy. There were shortcomings such as the inability to satisfy the demand for higher density for magnetic recording and reproducing devices.

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, an object of the present invention is to provide a magnetic head with a two-part bonded structure consisting of a gap section that outputs magnetic flux to the surface and an excitation section that forms a ring structure below the gap section, thereby increasing the height of a magnetic recording and reproducing device. It is an object of the present invention to provide a method for manufacturing a magnetic head that satisfies the demand for increased density.

[Means for solving problems]

A method for manufacturing a magnetic head according to the present invention includes the steps of forming kerfs along the longitudinal direction in each of two slider blocks, fitting and fixing an erasing core block into each of the kerfs, and fixing the erase core block to each of the kerfs. forming a composite core block by interposing a recording/reproducing core block between two opposing slider blocks such that the erasing core block is located inside and at both ends of the recording/reproducing gap; A step of slicing the composite core block to form a plate-shaped composite core chip, and recording and reproducing back cores and erasing back cores are arranged in a cross pattern at corresponding positions on the surface of the composite core chip opposite to the sliding surface of the magnetic medium. This includes a step of joining each.

[Effect]

In the method for manufacturing a magnetic head of the present invention, the magnetic head has a two-part joint structure consisting of a gap part that emits magnetic flux to the surface and an excitation part that forms a ring structure below the gap part, so the gap part has a so-called thick candy-like structure. The manufacturing method enables mass production, and the excitation part forming the ring structure below it becomes a structure that does not require dimensional accuracy.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 (al-(1)) is a perspective view showing nine manufacturing steps of a gear knob portion in a method of manufacturing a magnetic head according to an embodiment of the present invention.

First, as shown in FIG. 1 (5), cut grooves 2.2 each having a rectangular cross section are cut along the longitudinal direction of the central part of one side of two slider blocks 1.1 each having a rectangular cross section made of a non-magnetic material. to drill.

Next, as shown in FIG. 1Cb), slider block 1
Erasing core blocks 3.3 made of a magnetic material with high magnetic permeability such as sendust or ferrite and having a rectangular bar shape are inserted into each of the kerfs 2.2 of 1 so as to loosely fit therein.

Subsequently, the erased core block 3. inserted into the kerf 2.2.
Cut 3? In order to fix it in R2,2, as shown in FIG.
The molten glass 4.4 is filled into the gap between the cut groove 2.2 and the erase core block 3.3 and solidified (see FIG. 1 (dl)).

Next, as shown in FIG. 1, the slider block 1.
The surfaces provided with the kerfs 2.2 of 1 are each polished.

Next, as shown in FIG.
A high melting point glass 6 containing 5i02 or the like is vapor-deposited on one side of the abutting surface formed by the side end surfaces of the recording/reproducing core blocks 5.5, and the image recording/reproducing core blocks 5.5 are butted and joined to record/reproduce. A gap 7 is formed.

Next, as shown in FIG. A recording/reproducing core block 5.5 having a recording/reproducing gear 7 is interposed therebetween, and the erasing core blocks 3.3 are positioned at both ends of the recording/reproducing gap 7 to form a composite core block 8.

Then, as shown in FIG. 1 (hl), a plate-shaped composite core chip 9 having a predetermined thickness is obtained by sequentially slicing the composite core block 8 in the direction shown by the two-dot chain line along the longitudinal direction of the composite core block 8. , which acts as a gap section that releases magnetic flux to the surface.

FIGS. 2(a) to (2)(cl) are perspective views showing steps of creating an excitation part in a method of manufacturing a magnetic head according to an embodiment of the present invention.

To create the excitation part, which is a lower ring structure that forms a two-part joint structure with the gear part, first, as shown in FIG. Due to the magnetic material of
The back core block 10, which has a U-shaped cross section, is sequentially sliced along its longitudinal direction in the direction indicated by the two-dot chain line.
A recording/reproducing back core 11 as shown in FIG. 2 (bl) and an erasing back core 12 as shown in FIG. 2 (C1) are formed, respectively.

The erasing back core 12 has long legs so as to straddle the recording/reproducing back core 11 and be attached in a crosswise manner. Further, the valley widths of the recording/reproducing back core 11 and the erasing back core 12 are formed to be wider than those of the recording/reproducing core chip 13 and the erasing core chip 14 constituting the composite core chip 9 to facilitate attachment.

A recording/reproducing coil 15 is wound around the recording/reproducing core 11.
An erasing coil 16 is wound around the erasing back core 12 .

FIG. 3 shows a gap part that brings out magnetic flux to the surface, that is, a composite core chip 9, and an excitation part that has a ring structure underneath, that is, a recording/reproducing back core 11 and an erasing back core 1.
FIG. 2 is an exploded perspective view showing the state of the two-part structure before joining.

Surface 1 of composite core chip 9 opposite to magnetic medium sliding contact surface 17
No. 8 recording/reproducing core chip 13. Top surface 13a of 13, L3
a, the bottom surfaces 11a, 1 of both legs of the recording/reproducing back core 11;
After positioning 1a, it is fixed with adhesive or the like. Next, the erase back core 1 is placed on the upper surface 14a, 14a of the erase core chip 14.14 so as to straddle the recording/reproducing back core 11.
After positioning the bottom surfaces 12a and 12a of both legs of No. 2,
Fix with adhesive, etc. In this way, a magnetic head as shown in FIG. 4 is manufactured by the magnetic head manufacturing method of this embodiment.

Note that the composite core chip 9, the recording/reproducing back core 11, and the erasing back core 12 can be bonded using an adhesive or the like as described above, or may be bonded using a bonding ferrite technique without damaging the ferrite composition. .

In this way, according to this embodiment, the composite core chips that serve as the gap portions that direct magnetic flux to the surface are obtained by sequentially slicing composite core blocks that have the same shape like a so-called thick candy, so mass production is possible. Therefore, it is possible to significantly reduce costs.

In addition, the yield is improved, and the dimensional accuracy is high and the demand for high density can be satisfied.

Furthermore, by adopting a two-part junction structure, it becomes possible to appropriately select the materials passed through the gap portion and the excitation portion.

〔Effect of the invention〕

As described above, according to the method for manufacturing a magnetic head according to the present invention, it is possible to mass-produce composite core chips that serve as the gap portion for exposing the magnetic flux to the surface, and this has the remarkable effect of significantly reducing costs. .

Further, since the composite core chip is obtained by slicing a continuous composite core block, the yield is improved and a magnetic head with high dimensional accuracy can be obtained, which is a unique effect.

Furthermore, since the magnetic head is split into two parts and placed horizontally,
A magnetic material with high permeability is used for the composite core chip, and another magnetic material is used for the recording/reproducing back core and the erasing back core, making it possible to create a structure that does not require precision. It has the advantage of being selective.

[Brief explanation of drawings]

FIGS. 1(a) to (1) are manufacturing process diagrams of a composite core chip according to the present invention; FIGS. FIG. 3 is an exploded perspective view showing the state of the composite core chip according to the present invention, a recording/reproducing back core, and an erasing back core before bonding, and FIG. FIG. 2 is a perspective view of a magnetic head obtained by using a magnetic head. Recording/reproducing gap, 8... Composite core block, 9... Composite core chip, 11... Recording/reproducing back core, 12... Erasing back core. Fig. 1(a) Fig. 1(f) Figure 2 (a) Figure 2 Figure 4 Figure 3 Figure 4

Claims (1)

[Claims] A step of forming a kerf along the longitudinal direction in each of the two slider blocks, a step of fitting and fixing an erasing core block into each of the kerfs, and a step in which the erasing core block is located inside and recording/reproducing is performed. A process of interposing a recording/reproducing core block between two slider blocks facing each other so as to be located on both ends of the gap and joining them to form a composite core block, and slicing the composite core block to form a plate-shaped composite. The method is characterized by comprising a step of forming a core chip, and a step of joining a recording/reproducing back core and an erasing back core in an intersecting manner at respective corresponding positions on the surface of the composite core chip opposite to the sliding contact surface with the magnetic medium. A method of manufacturing a magnetic head.