JPH03185607A - Production of floating type magnetic head - Google Patents

Abstract

PURPOSE:To improve productivity without allowing the residual part of a core to remain by providing a cut surface on a head block in such a manner that the joining width of a slider block with a core block is the same as the core width on a medium-facing surface side and is the same as the width of the slider block on the opposite side thereof. CONSTITUTION:The head block formed by joining the core block 11 and the slider block 11 via a nonmagnetic material to constitute a magnetic gap is so formed that the joining width of the slider block 10 with the core block 11 is the same as the core width CW on the side 11b to be the medium-facing surface side. The cut surface inclined with the gap-facing surface is provided on the head block at the same width as the width S 2 of the slider block 10 on the opposite side 11a thereof. The residual core part is simultaneously removed in this way at the time of cutting the core block 11 to the prescribed core width. The workability is thus improved.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method of manufacturing a floating magnetic head used in a fixed magnetic disk device.

Prior Art FIGS. 6 and 7 IJ are a front perspective view and a back perspective view, respectively, showing a conventional floating magnetic head. Figures 6 and 7
In the figure, 1 is a head slider made of magnetic 11 material, and the head slider 1 has floating rails la, lb.
, lc are provided.

2 is a core also made of magnetic material, and core 2
is bonded to one end surface of the head slider 1 using bonding glass or other adhesive. The length BW of the back gap line 3 at the joint on the side opposite to the medium facing surface of the joint between the core 2 and the head slider 1 is determined by the length BW of the body of the core 2 on which the coil (not shown) is wound [111]. It is sufficiently larger than the width CW and about the same as the width SW of the head slider-1. In the conventional floating magnetic head configured as described above, since a large bonding area between the core 2 and the head slider 1 can be secured, the bonding strength between the core 2 and the head slider 1 can be increased, and Magnetic resistance at the back gap portion can also be reduced, and magnetic efficiency can be improved.

Next, a method of manufacturing a conventional floating magnetic head will be described below.

First, as shown in FIG. 8, a C-shaped core block 5 also made of ferrite material is bonded to one end surface of a ferrite block 4, which will become a head slider by later processing, using a bonding glass or the like. , the core block 5 is rubbed in the shape l shown in FIG. 9 using a grindstone 6. then the 10th
The hatched portion shown in the figure is ground to form the shape shown in FIGS. 6 and 7. Further, a coil (not shown) is then wound around the body 7 of the core 2 to complete a floating magnetic head.

Such a floating magnetic head has a sixth position above the magnetic recording medium.
It floats at an angle so that the air outflow end side B is closer to the magnetic recording medium than the air inflow end iA side shown in the figure.

Problems to be Solved by the Invention However, in the conventional manufacturing method, as shown in FIG.
There was a problem in that a core remainder of 8.9 remained in uq. This core remaining portion 8.9 has a narrow bonding area with the head slider 1, so the bonding strength is very low, so when an impact is applied, it will peel off from the head slider 1.
This may cause damage to magnetic heads, magnetic recording media, etc. A specific example of this impact is the contact between the core remainder 8.9 and the magnetic recording medium. As mentioned above, the air outflow end B of the floating magnetic head floats at an angle closer to the magnetic recording medium than the air outflow end side, so the head slider 1 becomes unstable and does not float properly. When not, the core remaining portion 8.9 on the air outflow end B side tends to come into contact with the magnetic recording medium. Due to the impact at that time, the remaining core was 8,9
peels off from the head slider. Further, when removing the core remaining portion 8.9, it was necessary to apply a grindstone to each floating magnetic head to remove it, resulting in poor workability and poor productivity.

The present invention is intended to solve the above-mentioned conventional problems, and it is an object of the present invention to provide a method of manufacturing a floating magnetic head that does not leave any core residue and has good productivity.

Means for solving the problem In order to achieve this objective, a head block is formed by joining the core block and slider block through a non-magnetic material that serves as a magnetic gap, and the width of the joint between the core block and the slider block is the same as that of the head. The head block was provided with a cutting surface that was inclined with respect to the gap facing surface so that the width of the block was the same as the core width on the side that would become the medium facing surface, and the width of the slider block was the same on the opposite side.

Function: With this configuration, when cutting the core block to a predetermined core width, the core remaining portion can be removed at the same time.

Embodiment FIGS. 1 and 2 are perspective views showing a floating magnetic head manufactured by a method for manufacturing a floating magnetic head according to an embodiment of the present invention. In Figures 1 and 2, 1
0 is composed of an oxide magnetic material such as ferrite, and t
: The head slider 11 has a core made of an oxide magnetic material such as ferrite, and a metal magnetic film 12 is formed on the core 11 using sendust. 13 is a non-magnetic material that serves as a magnetic gap provided between the metal magnetic film 12 and the head slider 10; 14 is the head slider 1;
This is a bonded glass in which 0 and core 11 are bonded. core 1
1 and the head slider 10, the length BW of the pack gap line 15 of the joint 11a on the side opposite to the medium facing surface is determined by the length BW of the core l around which the coil (not shown) is wound. It is sufficiently larger than the width CW of the body part and is about the same as the width SW of the head slider 10. Also, the joint part 11
The thickness of a becomes thinner as it approaches the medium facing surface. As described above, in the floating magnetic head constructed by the manufacturing method of this embodiment, unlike the conventional method, the core remainder is not formed on the air outflow end side of the floating rail, so that the floating magnetic head floats above the magnetic recording medium. In this state, the remaining part of the core comes into contact with the magnetic recording medium and peels off, which does not damage the floating magnetic head or the magnetic recording medium as in the conventional case.

A method of manufacturing a floating magnetic head according to an embodiment of the present invention will be described below. First, as shown in FIG. 3, a magnetic block 16 that will become the head slider 10 and a magnetic block 17 that will become the core 11 are butted together via a non-magnetic material 13 that will become the magnetic gap, and the two will be joined with a bonding glass 14 to form the head half. A body 18 is formed. At this time magnetic block 16.1
A winding groove for winding is formed in each of the magnetic blocks 17 and 7, and substantially the joint parts 17a and 17 of the magnetic block 17 are connected to each other.
b is in contact with the magnetic block 16.

Also, the surface of the magnetic block 17 facing the gap is metal magnetic! I
I12 is provided. A plurality of such head halves 18 are formed. Next, as shown in FIG. 4, a plurality of head halves 18 are arranged at an angle on a saw blade-shaped table. At this time, they are arranged so that the sides that will become the medium facing surfaces face the same direction.

Next, as shown in FIG. 4, the grinding wheel 19 is attached to the shaft at the same interval as the width CW of the body of the core 11, and the cutting machine 19 becomes the media facing surface of the head half-rest 18 (from 11+1 along the direction of arrow M). At the joint 17b, the magnetic block 16 is joined only by the width CW of the body of the core 11, and the joint 17b
7a, the magnetic block 16 has the same width as the magnetic block 16.
Joint part 11 diagonally from joint part 17b as if joined with
Cut to a. Next, cutting and polishing are performed on the medium facing surface 11111 to produce a floating magnetic head as shown in FIG.

As described above, according to this embodiment, by cutting diagonally from the part of the magnetic block 16 that becomes the medium facing surface to the joint part 11a using the cutting machine 19, the body of the core 11 is formed and at the same time the floating rail is cut. Since it is possible to prevent the core remaining portion from forming on the air outflow end side of the core, productivity is improved.

Further, as shown in FIG. 5, a notch 10a is provided in the portion of the head slider 10 opposite to the joint 11a.
By providing the joint crow 20 at the portion sandwiched between the core 11 and the core 11, the joint area between the core 11 and the head slider 10 can be increased. Due to this, bonded glass 2
Even if 0 is made of low melting point glass with weak bonding strength, sufficient bonding strength can be obtained. Therefore, since the core 11 and the head slider 1O can be bonded at low temperatures, in a floating magnetic head with a metal magnetic film on the surface facing the gap, the components in the metal magnetic film are absorbed into the core 11. It is possible to prevent the formation of a pseudo gap at the interface between the core 11 and the metal magnetic film.

FIG. 11 is a perspective view showing another embodiment. In FIG. 11, 21 is a head slider made of a magnetic material such as ferrite, and the head slider 21 is provided with floating rails 21a, 21b, and 2IC. Reference numeral 22 denotes a core made of the same material, and the joint between the core 22 and the head slider is the core 22 on the side opposite to the medium facing surface.
Although it is wider than the body part CW of , it is the same as or narrower than the interval between the floating rails 21b and 211. This has a smaller bonding width on the face facing the pack gap than the one shown in FIG. 1, so the bonding strength and magnetic resistance are somewhat inferior, but since no core remainder is formed, the problems of the conventional method do not occur. A cutting machine 23 as shown in FIG. 12 is used to process into such a shape. The cutting machine 23 is constructed by attaching a pair of grindstones 23a having a step to a shaft 23b. In FIG. 12, 24 is a core block that is a core, and 25 is a slider block that is a slider.

Effects of the Invention The present invention forms a head block in which a core block and a slider block are joined via a non-magnetic material that forms a magnetic gap, and the joining width of the core block and the slider block is on the side of the head block that is the media facing surface. By providing a cutting surface on the head block that is inclined with respect to the surface facing the gap so that the width is the same as the core width, and the width on the opposite side is the same as the slider block, the core block can be cut to the specified core width. The remaining core can be removed at the same time as cutting, improving workability and productivity.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a magnetic head manufactured by a method for manufacturing a floating magnetic head according to an embodiment of the present invention, FIG. 2 is an enlarged cross-sectional view of the same, and FIGS. 3 and 4 are examples of this embodiment. FIG. 5 is a perspective view showing a method of manufacturing a floating magnetic head in one embodiment, and FIG. 5 is a perspective view showing another embodiment. O... Head slider... Core 2... Metal magnetic film 3... Non-magnetic material 4... Bonding glass b...・・・Joint part 5・・・Pack gap line

Claims (1)

[Claims] A step of forming a head block by joining a slider block that will become a slider and a core block that will become a core with a non-magnetic material that will become a magnetic gap, and the joining width of the core block with the slider block The head block is tilted with respect to the gap facing surface so that the width of the block is the same as the core width on the side that will become the medium facing surface, and the same as the width of the slider block on the opposite side of the side that will be the medium facing surface. 1. A method for manufacturing a floating magnetic head, comprising the steps of: cutting the slider block; and forming a floating rail on the slider block.