JPH0261807A - Magnetic head - Google Patents

Abstract

PURPOSE:To obtain stable depth length by filling glass in a winding groove uniformly by forming both ends of a joining glass body with glass with a low m.p. CONSTITUTION:A melting glass body 14 in which a joined body whose both ends are formed with the glass with low m.p. and whose center with the glass with a high m.p. is heated and melted is filled uniformly in the winding groove 4 and a track width setting groove 7. Therefore, since the melted glass 14 is filled in the edge of the winding groove 4, no notch is generated at the edge of the groove 4 in a working process for an outer winding groove, etc. Thereby, depth length D can be set at a constant value and obtained stably. Also, in a joined glass body which becomes the melted glass 14, the floating of the glass is regulated by arranging a glass vapor-deposited film 18 with a softening point higher than that of the glass 17 with the low m.p. on both sides of the glass with the high m.p., and the glass 17 with the low m.p. is crimped then, heated and melted. A head can be obtained by cutting compound glass 19 in bar shape.

Description

DETAILED DESCRIPTION OF THE INVENTION [First aspect of the invention] (Field of industrial application) The present invention relates to a magnetic head, and particularly to a magnetic head formed by glass melt 71.

(Prior Art) FIGS. 8 and 9 are perspective views showing core block pieces constituting a conventional magnetic head.

Coreb [-1] Ivy piece 1 is machined from a rectangular magnetic material such as fly T fly 1, etc., and a rack width setting of 1 to 2, which determines the track width, is formed on its - side. ing.

Core block piece 3 is this core block piece 1 and [+]1
The winding 1%'+4 is formed on a magnetic material having a shape of -, and the winding groove 4 is the track width setting groove 5 of the core block piece 3.
It is formed with great emphasis on

This core plate [1 piece 1 and 3 is attached with a glass plate] and a 21-piece vine is formed. FIG. 10 (, L This is a perspective view for explaining this.Coab 1 Cock piece 1.3
are joined, and a cylindrical lath 6 is suitably suspended in the winding groove 4. Next, the glass slab 6 is heated to a molten state, and the core block pieces 1.3 are attached thereto. A J:1-rack width setting groove 7 is formed in the track width setting grooves 2 and 5, and this track width setting groove 7 determines the length of the leading end 8 that comes into contact with the magnetic tape. In other words, 1゛(I
The length of the tip 8 at the tip of the knob 9 becomes the track width. The gear A/tube 9t is formed by arranging a gap forming film (not shown) made of a non-magnetic material before the glass Fa is attached, and the gap length is regulated by this gap forming film.

Next, the sliding surface of the core block is rounded and cut at a surface forming a predetermined angle with the joint surface of the core block piece 1.3.

By the way, when the glass rod 6 is heated and in a molten state, its flow becomes non-uniform due to the surface tension of the glass. For this reason, winding! There is a possibility that the molten glass 10 may not be evenly filled into M4 and the track width setting groove 7. 11th
The molten glass 10 is shown in a satin pattern. J shown in Figure 1.1,
However, if the edge part of the winding 12 is not filled with the molten glass 10, due to the material being hard and brittle, it may be difficult to fill the edge part of the outer winding groove, as shown in the cross-sectional view of Fig. 13. The edges may become rounded, and depping and chipping may occur as shown in the cross-sectional view of FIG. For this reason, the measurement error of the depth ring of the GitF knob 9 becomes large, and the measurement may become impossible. The depth length is related to the output characteristics, and if the depth ring is non-uniform, there is a problem that the output characteristics cannot be improved and the quality cannot be stabilized. In addition, if a large number of glass rods 6 are inserted to ensure that both ends of the core block piece are filled with glass, more molten glass 10 than necessary will fill the winding groove 4, as shown in FIG. There was also a problem that the winding groove 4 became clogged with holes and the product was defective.

(Problem to be Solved by the Invention) In this way, in the above-mentioned conventional magnetic head, the flow of the glass that fuses the core block pieces is uneven;
There were problems in that the winding grooves were not evenly filled with glass, making it impossible to achieve a stable depth length of only 1.7 degrees, and that hole clogging occurred.

The present invention has been made in view of such problems, and C1
It is an object of the present invention to provide a magnetic head which can have a stable depth length of 111 and which does not cause product defects such as hole clogging.

[Structure of the Invention] (Means for Solving the Problems) The present invention provides a pair of track width setting grooves in which a winding groove is formed in the width direction and several track width setting grooves are formed in a direction perpendicular to the winding groove. Coreb [Edge pieces are joined, 1) A bonded glass pair consisting of low melting point glass at both ends and high melting point glass at the center is inserted into the 11th valley groove and heated and melted to transfer the molten glass to the edge part of the winding groove. Then, the track width setting 114 is filled, the core block pieces are glass-fused, and a pair of glass-fused core block pieces are cut to form an Iζ.

(Function) In the present invention, both ends of the bonded glass body are made of low melting point glass. The glass at both ends has high fluidity when heated and melted, and is melted at a low temperature and filled into the straight line. Therefore, the winding groove is evenly filled with glass, and from then on, 8 wires in one culm! : It is possible to reliably prevent depping etc. from occurring on I'i and maintain a stable depth length of 1! ′? can be done.

(Example) Hereinafter, the present invention will be described in detail based on the drawings. FIG. 1 is a perspective view of an embodiment of a magnetic head according to the present invention, and for convenience of explanation, only a half portion thereof is shown in a cutaway manner. Further, FIGS. 2(a) to ((j) are perspective views showing the manufacturing method of the bonded glass body used for glass fusing of the J magnetic head shown in FIG. 1 in order of steps. 11th
Components that are the same as those in the figures are designated by the same reference numerals, and the molten glass 14 is indicated by a matte pattern.

In FIG. 1, core blocks 11 and 12 are molten glass 1
4, the glass is fused. The winding groove 4 is formed in the track width direction and the track width setting is 7.
It is formed perpendicularly to the 11 vortices. Sliding surface 13 (yoR
A groove 9 is formed in the center thereof.

The width of the tip 8 of the gear 17 is set to the track width by the 1-rack width setting groove 7.

Note that the groove 9 of the gear 11 is formed between the track width setting grooves 7 (if/+7) (However, in FIG. 1, only the half cut groove is shown, so one of the track width setting grooves 7 is not shown. Not yet.

The winding groove 4 and the track width setting groove 7 are evenly filled with molten glass 14, which is obtained by heating and melting a pair of bonded glasses consisting of low melting point glass at both ends and high melting point glass at the center. As a result, the edge portion of the winding groove 4 is filled with molten glass 14, and the outer winding! : In the culm of 1'I processing, etc., occurrence of chipping etc. at the edge portion of the winding groove 4 is prevented. Therefore, the depth IcD becomes a constant value.

Next, a method of manufacturing the lath 14 by thermally melting the lath 1111 and the laminated glass body 15 will be described with reference to FIG.

The material of the glass plate 16 is selected based on the adhesion characteristics of the material 1 to 1. A 1°C melting point glass block 17 is selected to have a low melting point so that it melts at a low temperature and flows 1J during glass fusing.

First, as shown in Figure 2(a), the glass plate [1 piece 1
On both sides of the block 6 are oxides such as alumina (△, 0203), silicon dioxide (SiO2), zirconium oxide (ZrO2), tantalum oxide (1-aos), or glass having a higher softening point than the low melting point glass block 11. The thickness is approximately 0.0 mm using thin film forming techniques such as sputtering or vapor deposition.
A glass flow regulating film 18 having a thickness of 2 to several μm is formed.

Next, as shown in FIG. 2(b), argon (Ar),
In an inert gas atmosphere such as nitrogen (N2), low melting point glass blocks 17 are crimped on both sides of the glass block 16,
It is heated to the melting point temperature of the low melting point glass block 17. In this case, the glass flow regulating film 18 is located between the high melting point glass block 16 and the low melting point glass block 17.
) Prevents diffusion and changes in the properties of the glass blocks 16 and 17.

As a result, the sized composite glass 19 is formed as shown in FIG. 2(C), and then cut at the position indicated by the broken line in FIG. 2(C). In this way, the bonded glass body 1 shown in FIG. 2(d)
Get 5.

Further, FIG. 3 is a perspective view showing another bonded glass pair used in the magnetic head of FIG. 1.

A bonded glass body 21 is formed by attaching an aqueous solution 20 such as an alkali to both ends of a glass body 6 used in a conventional magnetic head. The alkali acts on the flow of the glass, and when heated, the glass and the alkali react, making both ends of the bonded glass body 21 easy to flow.

Next, a manufacturing method using the bonded glass body 15 or the bonded glass body 21 will be explained with reference to FIGS. 4 to 7.

In FIG. 4, the core block pieces 1.3 are the same as the conventional ones, and the gear 1! of the core block pieces 1, 3! A gilt-forming film (not shown) is placed on the knob 9 and bonded. Next, the bonded glass body 15 or the bonded glass body 17 is cut into a length O, which is equal to the length of the block pieces 1, 3 and the road surface, and is wound into a wire i:
Insert into llI4. Next, it is pressurized and heated in an inert gas atmosphere such as Ar or N2 gas. Since both ends of the bonded glass bodies 15 and 17 have high fluidity during melting, shrinkage and gathering due to the surface tension of the glass can be prevented. Therefore, the molten glass 14 is evenly filled into the winding groove 4 and the track width setting groove 7 at J5.

FIG. 5 is a front view showing this state, and shows the molten glass 14.
is indicated by a satin pattern. As shown in FIG. 5, molten glass 14 is filled at the edge of winding M4.

Next, the depth angle is measured, and as shown in the perspective view of FIG. The core block is cut at a predetermined angle with the joint surface of 1°3 to form the σ magnetic head shown in Fig. 1. Fig. 7 shows a cross-sectional view of the core block cut in step i in 1. As shown in Fig. 7, the edge portion of the winding groove 4 is filled with the molten glass 14, and in the culm of the outer 8-gland filling process, etc., the winding groove is filled with insufficient molten glass 14. No curling, chipping, or chipping of the edges of 4 will occur.Chipping, etc. will occur in the winding groove 4, improving the measurement precision of the depth curve and improving quality. You can also
It is possible to prevent defects from occurring due to hole clogging.

[Effect of the Invention 1] As explained above, according to the present invention, since the winding Fll vortex is evenly filled with glass, the 1f bus quality can be made uniform, and the magnetic head according to the present invention has an extremely high performance. Be of quality.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the magnetic head according to the present invention, FIG. 2 is a perspective view showing the manufacturing method of a bonded glass body in order of process, and FIG. 4 and 6 are perspective views for explaining the magnetic head of FIG. 1, and FIG. 5 is a front view for explaining the magnetic head of FIG. 1. FIG. 7 is a sectional view for explaining the magnetic head of FIG. 1, FIGS. 8 and 9 are perspective views showing core block pieces, and FIG. 10 is a cross-sectional view for explaining the conventional magnetic head manufacturing method. FIGS. 11 and 12 are perspective views for explaining the problems of the conventional magnetic head, and FIGS. 13 and 14 are cross-sectional views for explaining the problems of the conventional magnetic head. . 11, 12...Core block, 4...Winding groove, 7...Track width setting groove, 8...Tip, 9 gear I/tube, 13...Sliding surface, 14...・Fused glass. \21 Figure 3 Figure 1 (a (b) Figure 2 Figure 6 Figure 7 Figure 13 Figure 14

Claims (1)

[Claims] A pair of core block pieces in which a winding groove is formed in the length direction and several track width setting grooves are formed in the direction perpendicular to the winding groove are joined, and both ends of the core block piece are made of low melting point glass in the winding groove. A pair of bonding glasses having a high melting point glass in the center is inserted and heated to melt the molten glass, filling the edge portion of the winding groove and the track width setting groove, glass fusing the pair of core block pieces, and bonding the glass. A magnetic head characterized in that it is formed by cutting a pair of fused core block pieces.