JPH06231439A - Floating type magnetic head and its production - Google Patents

Abstract

PURPOSE:To obviate the generation of flaws on a magnetic recording medium and medium-facing surface by preventing the projection of a core chip toward the medium-facing surface. CONSTITUTION:Floating rails 2, 3 and a slit 5, winding groove 4, etc., are constituted by machining, etc., on a slider 1. The core chip 6 is then inserted and temporally fixed into the slit 5 and thereafter, a reinforcing member 14 is arranged in a prescribed position. A glass rod 17 which is a molding material 11 is arranged as well. This glass rod 17 is softened by heat treating the rod to fix the core chip 6 into the slit 5 and thereafter, the medium-facing surface of the floating rail 2 is polished. As a result, the displacement of the slit 5 is regulated by the reinforcing member 14 even if the slit tends to be displaced in its depth direction by receiving force from the lapping plate and at the time of polishing the floating rail 2, therefore, the core chip 6 does not project to the medium-facing surface at the end of the polishing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floating magnetic head used in a magnetic recording / reproducing apparatus and the like and a method of manufacturing the same.

[0002]

5 and 6 are a perspective view and a front view showing a conventional floating magnetic head, respectively. 5 and 6
1, reference numeral 1 is a slider made of a ceramic material such as calcium titanate, and the slider 1 is provided with a pair of parallel levitation rails 2 and 3, respectively. Furthermore, a winding groove 4 is formed on the air outflow end side of the slider 1, and by forming this winding groove 4,
The air outflow end side of the slider 1 has a front end 1a and a back end 1b.
Is divided into Also, on the air outflow end side of the levitation rail 2,
The winding groove 4 is formed while penetrating the front end 1a and the back end 1b.
A slit 5 is provided which is substantially orthogonal to and which is formed along the longitudinal direction of the levitation rail 2. 6 is a slit 5
The core chip 6 is a core chip fixed and held in
A core 7 of a mold and a core 8 of a C shape are butted against each other via a magnetic gap 9 and bonded to each other with a bonding glass 10. Reference numeral 11 denotes a molding material provided in the slit 5 of the front end portion 1a, and the molding material 11 is made of a nonmagnetic material such as glass. A bonding material 12 is provided in the slit 5 of the back end 1b, and the bonding material 12 is made of an organic material such as an epoxy resin. With the molding material 11 and the bonding material 12, the core chip 6 has the slit 5
I try not to leave.

A method of manufacturing the floating magnetic head having the above structure will be described below. First, after manufacturing the slider 1, the core chip 6 is inserted into the slit 5.
Next, the leaf spring 13 as shown in FIG. 5 is inserted into the slit 5 provided in the back end portion 1b, and the core chip 6 is pressed against the inner surface of the slit 5 to be temporarily fixed. At this time, a temporary adhesive or the like may be used to temporarily fix the core chip 6 in the slit 5. Next, the molten molding material 11 is poured into the slits 5 of the front end portion 1a and cooled to cure the molding material 11. After that, the leaf spring 13 is slit 5
Removed from the inside, the joint material 12 is poured into the gap into which the leaf spring 13 was inserted. Thus, the core chip 6 is permanently fixed in the slit 5 by the molding material 11 and the bonding material 12. After the main fixing is completed, the medium facing surface 20 of the slider 1 is subjected to polishing or the like to manufacture a floating magnetic head as shown in FIGS.

[0004]

However, in the above-mentioned conventional configuration, when the medium facing surface of the slider 1 is subjected to polishing or the like, a lap plate is pressed against the medium facing surface of the slider 1. At this time, In the arrow M direction shown in FIG. 6, the core chip 6 receives a force from the lap plate, the core chip 6 is slightly displaced in the arrow M direction, and the molding material 11 and the bonding material 1
The stress will be accumulated between the core 2 and the core chip 6. Therefore, when polishing of the medium facing surface is completed,
The core chip 6 will not receive the force from the lap plate,
Due to the accumulated stress, the core chip 6 is displaced in the direction opposite to the arrow M direction, that is, the medium facing surface side, and the portion of the core chip 6 on the medium facing surface side projects. Then, there is a problem that the protruding portion damages the magnetic recording medium when performing contact start / stop. Further, since the protruding portion is easily worn, the generation of abrasion powder increases, and the abrasion powder enters between the magnetic recording medium and the floating magnetic head to damage the medium and the medium facing surface of the head. there were.

The present invention has been made to solve the above-mentioned conventional problems, and prevents the core chip from protruding toward the medium facing surface to prevent a magnetic recording medium or a floating magnetic head from being scratched on the medium facing surface and its manufacture. The purpose is to provide a method.

[0006]

To achieve this object, a reinforcing member is provided on the surface of the slider opposite to the medium facing surface so as to cover at least a part of the slit.

[0007]

With this structure, even when a force is applied to the core chip when the medium facing surface of the flying rail is polished by the lap plate, the core chip is not displaced by providing the reinforcing member.

[0008]

1 is a perspective view showing a floating magnetic head according to an embodiment of the present invention. In FIG. 1, 1 is a slider, 1a and 1b are front and rear ends, 2 and 3 are floating rails, 4 is a winding groove, 5 is a slit, 6 is a core chip, 7 and 8 are cores, respectively. Is a magnetic gap, 11 is a molding material, and these are the same as the conventional structure. Reference numeral 14 denotes a reinforcing member provided on the side of the slider 1 opposite to the medium facing surface, and the reinforcing member 14 is attached so as to cover the opening of the slit 5 exposed on the side opposite to the medium facing surface. As shown in FIG. 2, the reinforcing member 14 has a structure in which a glass film 16 is provided on a non-magnetic substrate 15 such as ceramic. The glass film 16 is produced by using a thin film forming technique such as a sputtering method or a vapor deposition method. Although the reinforcing member 14 has the above-described structure in this embodiment, a glass film or the like may be formed on a magnetic substrate made of a magnetic material such as ferrite, or a resin may be formed on the substrate. It may be formed with a film of an organic substance such as. Further, although the reinforcing member 14 has the configuration in which the glass film 16 is formed on the non-magnetic substrate 15, the reinforcing member may be made of a single material having a bonding property. At this time, the reinforcing member 1
For example, 4 is made of a single material such as glass or resin.

In the floating magnetic head constructed as described above, the reinforcing member 14 is attached to the slider 1 on the side opposite to the medium facing surface, and the movement of the core chip 6 in the direction perpendicular to the medium facing surface is restricted. Even when a force is applied to the core chip 6 when polishing the medium facing surface of No. 1 with a lap plate or the like, the core chip 6 is not displaced in the depth direction of the slit 5, so that the core chip 6 does not move after the polishing. It does not stick out. Furthermore, when the magnetic head supporting device (not shown) is attached to the surface of the slider 1 opposite to the medium facing surface, the exposed core chip 6 is scratched on the surface opposite to the medium facing surface. However, in this embodiment, the portion of the core chip 6 exposed on the surface of the slider 1 opposite to the medium facing surface is provided with the reinforcing member 1.
Since it is protected by 4, the core chip 6 is not scratched.

A method of manufacturing the floating magnetic head having the above structure will be described below with reference to FIGS.

3 and 4 are front views showing a method of manufacturing a floating magnetic head according to an embodiment of the present invention. First, the levitation rails 2 and 3 (more precisely, the projecting rails that ultimately become the levitation rails 2 and 3) are formed on the slider 1 by cutting or the like, and the slit 5 and the winding groove 4 are further formed.
Etc. are also formed by cutting or the like. Next, the core chip 6 is temporarily fixed in the slit 5. To temporarily fix the core chip 6, first, the core chip 6 is inserted into the slit 5, and then the core chip 6 is fixed to one inner side surface of the slit 5 by using a leaf spring, an instant adhesive or the like. At this time, the surface of the core chip 6 opposite to the medium facing surface is made substantially flush with the surface of the slider 1 opposite to the medium facing surface. Next, the reinforcing member 14 is arranged on the surface of the slider 1 opposite to the medium facing surface so as to close the opening of the exposed slit 5, and further on the slit 5 provided on the front end 1a. By arranging the glass rod 17 and subjecting it to heat treatment, the glass rod 17 is softened, and the slits 5 provided in the front end portion 1a.
It is poured into the inside to fix the core chip 6 in the slit 5, the glass film 16 provided on the reinforcing member 14 is also softened, the reinforcing member 14 is bonded to the slider 1, and the medium facing surface of the core chip 6 opposite to the medium facing surface is formed. The surface is also joined to the reinforcing member 14 by softening the glass film 16. At this time, the glass rod 17 becomes the molding material 11. Next, as shown in FIG. 4, the medium facing surface of the floating rail 2 is polished using a lap plate or the like.

In the present embodiment, since the reinforcing member 14 is provided, even if a force is applied to the core chip 6 by the lap plate, the core chip 6 is prevented from being displaced in the depth direction of the slit 5, so that the polishing process is performed. Even after the completion, it is possible to prevent the core chip 6 from protruding toward the medium facing surface side.

[0013]

According to the present invention, a reinforcing member is provided on the surface of the slider opposite to the medium facing surface so as to cover at least a part of the slit, so that the medium facing surface of the levitation rail is polished by a lapping plate. Even if force is applied to the core chip, the core chip will not be displaced due to the provision of the reinforcing member.
Since the core chip does not project to the medium facing surface, the core chip is prevented from projecting to the medium facing surface, and the magnetic recording medium and the medium facing surface are not scratched.

[Brief description of drawings]

FIG. 1 is a perspective view showing a floating magnetic head according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a reinforcing member used in the floating magnetic head according to the embodiment of the invention.

FIG. 3 is a front view showing a method of manufacturing a floating magnetic head according to an embodiment of the present invention.

FIG. 4 is a front view showing a method of manufacturing a floating magnetic head according to an embodiment of the present invention.

FIG. 5 is a perspective view showing a conventional floating magnetic head.

FIG. 6 is a front view showing a conventional floating magnetic head.

[Explanation of symbols]

 1 Slider 2, 3 Levitation Rail 5 Slit 6 Core Chip 11 Molding Material 14 Reinforcing Member 15 Non-Magnetic Substrate 16 Glass Film

Claims (4)

[Claims] 1. A slider having a levitation rail, and a slit provided on the levitation rail along the air inflow / outflow direction so as to reach from the medium facing surface of the slider to the surface opposite to the medium facing surface. A reinforcing member provided on the surface of the slider opposite to the medium facing surface so as to cover at least a part of the slit, and a core chip housed in the slit and having a magnetic conversion portion. Floating magnetic head. 2. The floating type according to claim 1, wherein a reinforcing member is provided on the non-magnetic substrate with a glass film, and the reinforcing member is provided on the slider so that the glass film faces the slider. Magnetic head. 3. A slit is formed on the flying rail of the slider along the air inflow / outflow direction, and further so as to reach from the medium facing surface of the slider to the opposite side of the medium facing surface, and a magnetic conversion portion is provided in the slit. The core chip is temporarily fixed, a reinforcing member is attached to the surface of the slider opposite to the medium facing surface so as to cover the at least a part, and the core chip is fixed in the slit with a molding material, and then the floating A method of manufacturing a floating magnetic head, comprising polishing a surface of a rail that faces a medium. 4. The floating type according to claim 3, wherein a reinforcing member is provided on the non-magnetic substrate with a glass film, and the reinforcing member is provided on the slider so that the glass film faces the slider. Magnetic head.