JPH0636253A - Manufacture of floating magnetic head - Google Patents

Abstract

(57) [Summary] [Object] To provide a method for manufacturing a floating magnetic head, which does not deteriorate workability and assembly accuracy even if it is downsized. [Structure] A core chip 1 having a core chip 1a larger than the final size is fixed in a slit groove of a slider by glass fusion, and in this state, the processed portions 1b and 1c are processed at the time of processing the back surface and the end surface of the slider, and the floating type magnetic core 1a Since the head is manufactured and the large core chip 1 is used for assembly and processing, the workability and the assembly accuracy are not reduced as compared with the conventional product even if the size is smaller than the conventional product.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a floating magnetic head used in a hard disk type magnetic recording drive device.

[0002]

2. Description of the Related Art In recent years, high capacity magnetic recording drive devices
Corresponding to the trend toward higher density and smaller size and lighter weight, conventional magnetic type miniature sliders with outer dimensions of 2.6 mm in width, 4.343 mm in length and 0.864 mm in height are also available. The size of each floating magnetic head is gradually reduced to 70% and 50%.

Therefore, as a conventional example, a composite type floating magnetic head will be taken as an example and described below. Figure 3
FIG. 3A is a perspective view of a conventional floating magnetic head, and FIG.
Is a perspective view of the core chip, and FIG. 4 is a front view and a side view of a main part for explaining the manufacturing method.

As shown in FIGS. 3 (a) and 3 (b), the conventional floating type magnetic head has at least one floating rail end of a slider 9 made of non-magnetic ceramic having two floating rails 9a and 9b. A core chip 12 having a slit groove 10 in which a magnetic gap 11 is formed by cores 12a and 12b made of two metal-based oxide magnetic bodies in the slit groove 10 is fused with a mold glass 13. Further, the slider 9 is provided with a winding window 14 for winding a coil wire for generating a magnetomotive force necessary for reading and writing a signal to and from the magnetic gap 11.

Next, a conventional method for manufacturing the floating magnetic head will be described with reference to FIG. First of all,
As shown in (a) and (b), the core chip 12 processed into a predetermined shape is fixed to the slit groove 10 by using the metal spacer 15 having spring property on the slider 9 after the rail width processing, and further melted. The worn mold glass 16 is arranged above the slit groove 10. And this Figure 4
The mold glass 16 is melted by placing it in an electric furnace in the state of (a) and (b). Next, as shown in FIGS. 4C and 4D, the metal spacer 15 inserted in the previous step is removed after cooling. Further, as shown in FIGS. 4E and 4F, the epoxy resin 17 is filled in the slit groove 10 in the portion where the metal spacer 15 is removed, and is thermally cured. Next, as shown in FIGS. 4 (g) and 4 (h), the protruding portion of the epoxy resin 17 protruding to the back surface of the ceramic slider 9 is scraped off, and then the floating portion is floated as shown in FIGS. 4 (i) and 4 (j). A finishing lap of the surface of the rail 9a is performed.

[0006]

However, with the miniaturization of the magnetic head, it is very difficult for the conventional manufacturing method to secure workability, workability, and required accuracy. For example, the external dimensions are 70%, 5
If you try to make a slider that is as small as 0% by the conventional manufacturing method, insert the core chip into the slider.
The outer shape of the core chip handled in the fixing process is 70% or 50% of the conventional one, that is, the length x height is about 0.7 mm x 0.7 mm, or about 0.5 mm x 0.5 mm. . With such a size, not only the workability is deteriorated, but also the assembling accuracy required at the time of completion is lowered. Furthermore, even if an attempt is made to automate the product, the size of the product is too small to secure a sufficient holding part, and it is necessary to develop a new automatic machine. In this case, there arises a problem that the mass production of new products required by the market cannot be performed in a timely manner.

Further, in the above-described conventional manufacturing method, as the magnetic head becomes smaller in size of 70% and 50% of the conventional size, many kinds of outer shapes of the core chip are required, and the core material to be used also. It will be necessary to set and manage each type. That is, in the conventional manufacturing method, since the outer dimensions of the core chip cannot be unified, it is very complicated to manage the process.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a method of manufacturing a small floating magnetic head having excellent workability and assembly accuracy.

[0009]

In order to achieve this object, a method of manufacturing a floating magnetic head according to the present invention uses a core chip whose height and length are larger than final dimensions.
The upper and lower parts of the core chip are fixed to the slit grooves of the slider by glass fusion, and then the back surface and the end surface of the slider together with the core chip are processed to a predetermined size.

[0010]

Using this manufacturing method, even if the slider shape is gradually downsized to 70% or 50% compared to the conventional one, the step of inserting and fixing the slider in the slider to use a 100% large core chip The workability and the assembly accuracy do not deteriorate in the machining process as compared with the conventional one.

Further, since the core chips having the same shape and size can be used even if the shape and size of the slider are different, the process control is easy.

Furthermore, since the core chip is fused and fixed to the slit groove of the slider with glass in both the upper part and the lower part of the core chip, the conventional metal spacer removal and epoxy resin coating on the back side of the slit groove are performed. The steps of curing and removing the extra epoxy resin protruding to the back surface of the slider are unnecessary, which leads to a reduction in the number of steps.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A method of manufacturing a composite type floating magnetic head according to an embodiment of the present invention will be described below with reference to the drawings.

1 (a) and 1 (b) are a front view and a side view of a core chip used in a floating magnetic head having an outer size of 50% of that of a conventional one. As shown in FIG. 1, a core chip 1 made of a metal oxide magnetic material is processed to have a magnetic gap 2 and a track width 3 which determines the recording width of a signal on a magnetic recording medium. And 1a shows the final shape of the core chip which is 50% of the conventional one,
Reference numerals 1b and 1c respectively denote a portion (shaded portion) which is shaved when the height (thickness) of the magnetic head is regulated in a later step, and a portion (shaded portion) which is shaved when the length of the magnetic head is regulated.

Next, a method for manufacturing the same will be described with reference to the front view and the side view of the main part of FIG. First, FIGS. 2 (a) and 2 (b)
As shown in FIG. 3, the core chip 1 is fixed in the slit groove 4a of the slider 4 made of a predetermined non-magnetic ceramic by using the metal spacer 5, and the rod of the mold glass 6 on the front surface side and the rod of the mold glass 7 on the rear surface side are fixed. Is set in place. Next, as shown in FIGS. 2C and 2D, the slider 4 is heat-treated at a predetermined temperature to fuse the front side mold glass 6 and the back side mold glass 7. Next, as shown in FIGS. 2 (e) and 2 (f), the surface of the floating rail 4b is processed together with the mold glass 6, and the heights of the magnetic heads are provisionally made uniform. Next, as shown in FIG.
As shown in (h), the back surface 4c including the metal spacers 5 is processed to adjust the height to the final dimension, and the end surface 4d is further processed.
Are processed to adjust the length of the magnetic head to the final dimension. Then, as shown in FIGS. 2 (i) and 2 (j), the floating rail 4b
A final finishing lap of the surface (floating surface) is performed to define the final gap depth 8.

As described above, according to this embodiment, the outer dimensions of the core chip 1 are set to a sufficient size in advance, and the core chip 1 is directly fused to the slider 4 by glass, and then the height of the magnetic head is increased. Since the length of the magnetic head is regulated, the magnetic head can be mass-produced without deteriorating the workability, workability and assembling accuracy even if the shape of the magnetic head becomes 70% or 50% of the conventional shape. Furthermore, since the core chip 1 has a structure in which both the front surface side and the back surface side of the slider 4 are fused by the mold glasses 6 and 7, the metal spacer removal on the back surface side, the epoxy resin application / curing and It is possible to eliminate the step of removing extra epoxy resin.

Since this embodiment can be achieved by a simple means without significantly changing the conventional manufacturing method, a large investment in equipment, jigs, etc. is not required for implementation. Further, since the outer dimensions are 100% and 70% and 50% are used as a reference, the outer shape of the core chip 1 is different although the shape of the slider 4 itself and the winding groove of the core chip 1 are different. All dimensions can be the same shape and the same dimensions, so it is easy to manage management issues such as purchasing and production management issues for materials, and because the same materials and shapes are used, mass production effects at the time of material purchase are improved. The price advantage is also great.

[0018]

As is clear from the above description, according to the present invention, when a floating type magnetic head having a shape dimension ratio of 70% and 50% of that of the prior art is manufactured, the shape dimension of the core chip is made sufficiently large in advance. Since this is fixed on the slider by glass fusion, the height and length restrictions of the slider are processed, so workability, workability, and assembly accuracy are excellent no matter how small the external dimensions become. The manufacturing method can be realized.

Further, since the core chips to be used may have the same size, there is an effect that they can be easily managed in production management.

[Brief description of drawings]

FIG. 1A is a front view of a core chip used for manufacturing a floating magnetic head according to an embodiment of the present invention, and FIG. 1B is a side view of the same.

2 (a), (c), (e), (g), and (i) are front views of relevant parts for explaining a method of manufacturing a floating magnetic head according to an embodiment of the present invention. ), (D), (f), (h), and (j) are side views of the relevant parts.

FIG. 3A is a perspective view of a conventional floating magnetic head, and FIG. 3B is a perspective view of the core chip.

4 (a), (c), (e), (g), and (i) are front views of relevant parts for explaining a conventional method of manufacturing a floating magnetic head. (B), (d) , (F), (h), and (j) are side views of the main part.

[Explanation of symbols]

 1 Core chip before processing 1a Core chip after processing 1b, 1c Worked part 4 Slider 4a Slit groove 4b Floating rail 4c Rear surface of slider 4d End surface of slider 6,7 Mold glass

Claims (1)

[Claims] 1. A slider made of non-magnetic ceramic having two floating rails on its surface and slit grooves at the end including at least one of the floating rails, in the height direction and the length direction. The step of inserting a core chip made of a metal oxide magnetic material having a size larger than the final size, a step of fixing the upper and lower parts of the core chip to the slit groove by glass fusion, and the back surface of the slider together with the core chip. A method of manufacturing a floating magnetic head, comprising: a step of processing to finish the height of the slider to a predetermined dimension; and a step of processing the end surface of the slider together with the core chip to finish the length of the slider to a predetermined dimension.