JPH01192011A - Manufacture of magnetic head - Google Patents

Abstract

PURPOSE:To mount a coil on the inside of a slider only by applying a mechanical process and to stably support the coil on a gimbal by forming a groove to insert the coil to the slider on one side and a prescribed projection for supporting the gimbal. CONSTITUTION:The groove 120 to insert the coil is worked under-neath the joining plane 110 of the core chip of the slider 100 on one side. Also, plural grooves 140 formed extending from the bottom plane 130 of the slider to a coil insertion groove 120 are worked, the insertion of the coil can be performed by eliminating a part of plural projecting parts 150. Next, a magnetic head can be completed by joining the slider 100 on which a groove process is applied and the slider on the other side of a pair of sliders on a magnetic core chip 4. Therefore, it is possible to mount the coil on the inside of the slider only by applying the mechanical process on the slider 100, and to support the coil stably on the gimbal 8 via the projecting part 150.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a magnetic head for a floppy disk drive device, etc., and in particular to a magnetic head that can have a coil mounted inside a slider and can be stably supported on a gimbal. Relating to a manufacturing method.

[Conventional technology]

In general, a magnetic head such as a floppy disk drive device, as shown in FIG. Sliders 51 and 52 are bonded to the bonded magnetic core chip 4 and supported on the bottom of the slider 51 on the gimbal 8, and then a recording/reproducing magnetic core 1 and a coil 6 are attached to the erasing magnetic core 21.
It has a structure in which the rear core 7 is inserted and the rear core 7 is glued.

In addition, in order to make the floppy disk drive device thinner, as shown in FIG. 3, a slider 53 and a slider 54 are attached to the magnetic core chip 4 by cutting off a portion of the lower part of the adhesive surface with the magnetic core chip. After inserting the coil 6 into the magnetic core 11 and erasing magnetic core 21 and installing it inside the slider, and gluing the rear core 7, the slider 53
A magnetic head having a structure in which the bottom surface of the magnetic head is supported on a gimbal 8 is also widely used. However, the magnetic head with the structure shown in FIG. 3 is supported on one side by the bottom surface of the slider 53, and since the bottom surface of the slider 53 is partially cut off, the bottom area is narrow and the support on the gimbal becomes unstable. There was a drawback. Therefore, magnetic heads with structures shown in FIGS. 4 and 5 are also used as structures that address the drawbacks of the magnetic head with the structure shown in FIG. 3.

The magnetic head shown in FIG. 4 has sliders 55 and 56 whose bottom surfaces are partially cut off attached to a magnetic core chip 4, and a coil 6.
Set up a space to insert slider 5 on gimbal 8.
It has a structure that supports both sides at the bottom of the 5.56. However, in this structure, it is necessary to adjust the bottom surfaces of the sliders 55 and 56 so that they are on the same plane, and alignment accuracy between the magnetic core chip and the slider becomes an important issue.

That is, when the magnetic core chip and the sliders 55 and 56 are combined and bonded together, the relative positions of the sliders 55 and 56 are misaligned due to assembly errors.

There was a problem in that both sides could not be stably supported on the gimbal 7 at the bottom of each. The magnetic head shown in FIG. 5 is a slider 57 in which both corners 9 on the bottom side of the magnetic head chip adhesion side are cut out so that a coil can be inserted into the magnetic head chip 4.
．． The slider 58 is bonded to the slider 58 and supported on the gimbal 8 by the bottom surface of the slider 57. The magnetic head having the structure shown in FIG. 5 is also supported on one side by a slider 57, but by making the bottom of the slider T-shaped.

This prevents the support on the gimbal from becoming unstable.

However, this structure has a drawback in machining the slider 57. In other words, the slider is designed to ensure mechanical strength and slidability with the magnetic recording medium.

It is necessary to use ceramics such as barium titanate and calcium titanate as the material, and since ceramics are highly brittle materials, it is necessary to process fine and complex shapes with high precision, such as the slider 57 shown in Fig. 5. is very difficult and the processing cost is extremely high. Therefore, the fifth
One method for manufacturing the slider 57 shown in the figure is to mold ceramic powder as a raw material using a matrix mold and then sinter it. Although this manufacturing method can reduce processing costs compared to a method of machining block-shaped ceramics, there is a problem in that sufficient dimensional accuracy cannot be ensured due to volumetric shrinkage during sintering of ceramic powder.

[Problems to be Solved by the Invention] One object of the present invention is to solve the above-mentioned problems, and to provide a thinner floppy disk drive device in which the coil can be placed inside the slider and can be stably supported on the gimbal. It is an object of the present invention to provide a method for manufacturing a magnetic head that is easy to manufacture and has low processing costs.

[Means to solve problems]

In the present invention, on one of a pair of slider blocks, a groove for coil insertion is formed from the joint surface of the magnetic core chip, and a plurality of grooves are formed deep enough to reach the groove for coil insertion from the bottom surface of the slider. After removing a portion of the plurality of protrusions below the groove, the protrusions are bonded to a magnetic core chip to manufacture a magnetic head.

〔Example〕

The contents of the present invention will be explained in detail below with reference to the drawings. In the present invention, as shown in FIG. 6, by machining a groove 120 wide enough to allow the coil to be inserted from the magnetic core chip joint surface 110 of the slider 100, a space for installing the coil inside the slider is secured. In addition, as shown in the seventh article, the coil insertion groove 1 is inserted from the slider bottom surface 130.
A plurality of grooves 140 with a depth of up to 20 mm are machined, and a plurality of protrusions 1 are formed below the coil insertion groove as shown in FIG.
A coil can be inserted after the slider and the magnetic core chip are joined by breaking and removing a part of the slider 1.The slider 1 is grooved as shown in Fig. 1.
00 and the other slider 101 of the pair of sliders
is bonded to the magnetic core chip 4 to manufacture a magnetic head.

- The magnetic head manufactured by the manufacturing method of the present invention is a slider 10.
Although it is supported on one side by the bottom surface of 0, the coil insertion groove 120
The lower protrusion 150 can prevent support on the gimbal 8 from becoming unstable.

Further, according to the present invention, the processing of the slider 100 can be easily performed by using a peripheral slider or the like for groove processing, and by cutting or folding using nippers or the like to remove protrusions. This makes it possible to perform material machining, allowing for high-precision machining and reducing machining costs.

In the above embodiment, the case was described in which two grooves were formed with a depth that reached the coil insertion groove from the bottom surface of the slider 100, but as shown in FIG. By machining the grooves 140 at three or more locations, the protrusion 150 formed below the coil insertion groove can be easily cut.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to mount the coil inside the slider simply by machining the slider, and it is possible to easily manufacture a magnetic head that can be stably supported on the gimbal, thereby improving machining accuracy. This has the effect of improving the performance and reducing manufacturing costs.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a magnetic head manufactured according to an embodiment of the present invention, FIGS. 2, 3, 4, and 5 are perspective views showing the structure of a conventional magnetic head, and FIGS. Figure 7, Figure 8,
FIG. 9 is a perspective view showing the manufacturing process of the magnetic head according to the present invention. 1... Recording/reproducing gap, 2... Erasing gap, 3
...Spacer, 4...Magnetic core chip, 6...
Coil, 7... Rear core, 8... Gimbal, 9...
・Slider removal part, 11... magnetic core for recording and reproduction,
21... Erasing magnetic core 1.51, 52, 53, 54
,55,56°57.58,100,101...Slider, 110...Magnetic core chip joint surface, 120.
...Coil insertion groove, 130...Slider bottom surface, 14
0...Groove, 150...Protrusion. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6/30 Figure 7/lft0 Figure 8

Claims (1)

[Claims] 1. Processing a groove into which a coil can be inserted in the tangential direction of the sliding direction of the magnetic recording medium on the magnetic core chip joint surface of the slider; Processing a plurality of grooves on the bottom surface of the slider to a depth that reaches the grooves. and a step of removing a portion of a plurality of protrusions formed below the coil insertion groove by the groove processing, and a step of joining the processed slider to a magnetic core chip. Head manufacturing method.