JPS59119568A - Magnetic head - Google Patents

Abstract

PURPOSE:To obtain a slider which has superior floating characteristics and massproductivity by manufacturing the slider by adhesion. CONSTITUTION:Firstly, a slider part 51 having a bleed slot part is worked. The bleed slot part 42 is machined because continuous work is possible, so it is shaped with superior size precision and surface smoothness. The adhered surface of a part 52 as a tapered part is worked and then adhered 43 to the slider 51 having the bleed slot part and a skew surface 41 is polished again; and a tapered part is further worked to obtain the negative pressure slider having superior characteristics.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic head that flies above the surface of a recording medium to perform recording and reproduction, and that is provided with a region that generates negative pressure in the lubricated surface of a slider when it flies.

Conventionally, floating hent sliders that apply the principle of hydrodynamic air bearings have been commonly used as magnetic disk drives. Aiming at recording density, the flying amount has been miniaturized, and currently, Taber flat sliders of about 0.3 microns are in practical use.

Furthermore, magnetic disk drives have been made smaller and lighter, and recording media with a diameter of 5 inches or less are now on the verge of being put into practical use. This reduction in the diameter of the recording medium is
Problems such as deterioration of tracking performance occur due to a decrease in the relative speed between the recording medium and the magnetic head. As described above, slider design technology has been influenced by the increasing density and miniaturization of magnetic disk drives, and a magnetic head (hereinafter referred to as a negative pressure slider) has been developed in which a region that generates negative pressure is installed within the slider lubricating surface.

FIG. 1 shows a schematic diagram of a Taber 7 lanoto type slider, and FIG. 2 shows a typical example of a negative pressure slider.

11 is a core part, 12 is a gap part that generates buoyancy force, 16
14 is a coil, and 14 is a bleed slot portion.

21 of the negative pressure slider is the bleed slot part 1 in FIG.
4, and has a structure that generates negative pressure in this part.

FIG. 6 shows the flotation characteristics 31 of the Taber 7 Lasoto type slider and the flotation characteristics 32 of the negative pressure slider. It can be seen that in the case of a negative pressure slider, it is easy to float at low speeds, and at high speeds (during steady rotation), there is little fluctuation in the amount of floating due to the relative speed difference between the inner and outer circumferences, and the slider is stable. Furthermore, it can be seen that the negative pressure slider is also superior in the ability of the head to follow the surface roughness and waviness of the recording medium surface.

As described above, it is clear that the negative pressure slider flies quickly even when rotating at a low speed, its floating amount is not greatly affected by relative speed fluctuations between the inner and outer circumferences, and its ability to follow irregularities on the surface of the recording medium is excellent.

However, although the shape of the slider gas bearing surface is excellent from the viewpoint of gas lubrication characteristics, when the processing method is taken into consideration, it is not very suitable for mass production, as is clear from FIG.

Conventionally, a method has been proposed in which a photosensitive resin is applied to the slider, the negative pressure slider shape is patterned, and then the bleed slot part is processed by ion etching, etc., but the etching speed is slower with Beresist compared to the slider material. Therefore, the resist must be applied thickly, and due to reasons such as overetching, 1) the shape of the bleed slot part cannot be processed accurately, and 2) the unevenness generated on the etched surface deteriorates the floating characteristics of the slider. There are drawbacks,
Considering the slider characteristics and mass productivity, this method could not be said to be optimal.

The present invention eliminates these drawbacks and provides a slider with excellent flotation characteristics that can be mass-produced by manufacturing the slider by bonding.

FIG. 4 shows an overview of the magnetic head according to the present invention. 41
42 is a bleed slot portion that generates negative pressure, and 43 is a slider adhesive layer. An example of the manufacturing method will be shown below, and the features of the present invention will be described in detail.

As shown in FIG. 5, first, a slider portion 51 having a bleed slot portion 56 is processed. The bleed slot part is through l1. Because it can be machined, dimensional accuracy and machining can be achieved.
It can be made into a shape with excellent surface properties. After processing the adhesive surface 55, which is a part of the taber that generates the buoyancy force at the beginning of the rotation of the recording medium, it is bonded to the slider having a bleed slot portion (Fig. 6), and the ski surface is polished again. By forming a tapered part and creating the structure shown in FIG. 4, a negative pressure slider with excellent characteristics can be obtained.
can. In addition, for mass production, after manufacturing a block having a large number of bleed slots arranged in parallel as shown in Fig. 7, it is necessary to apply a cutting force n (according to the cutting line 71) to make one cut. A large number of negative pressure slider materials can be manufactured with just one.

As described above, according to the present invention, it is possible to obtain a negative pressure type magnetic head having a highly accurate slider gas bearing surface shape.

In addition, it is highly suitable for mass production, making magnetic disk drives compact and
0 can be said to be a magnetic head suitable for lightweight and high density.

[Brief explanation of drawings]

Fig. 1 - Overview of Taber flat type slider Fig. 2 - An example of a negative pressure slider Fig. 3 - Levitation characteristic diagram Figure 6: Negative pressure slider mass production method according to the present invention 11...
Core part 12... Gap part 13... Coil 14... Bleed slot part 21... Bleed slot part 61... Levitation characteristics of Taber flat slider 62...
-Flotation characteristics of negative pressure slider 41...Gap part 42...Bleed slot part 43...Adhesive layer 51...Slider 52 with bleed slot part
・Part 61 that becomes the taber part...Above the cut surface of the slider Applicant: Suwa Seikosha Co., Ltd. Agent Patent Attorney: Mogami, Figure 1, Figure 2 - 3, 1, 5r,! Figure 6

Claims (1)

[Claims] 1) A magnetic head that levitates above the surface of the recording medium to perform recording and reproduction due to the dynamic pressure effect of the air flow generated by the rotation of the recording medium, and has an area that generates negative pressure within the lubricated surface of the slider when floating. A magnetic head characterized in that the magnetic head is manufactured to have at least one adhesive portion other than the core adhesive portion.