JPS60239909A - magnetic head - Google Patents

Abstract

PURPOSE:To prescribe an axis of easy magnetization in the breadthwise direction of a magnetic pole to and improve the response speed of magnetization inversion by sticking a thin film magnetic head part to a floating slider and forming the sticking face into a curved surface and applying a strain to the magnetic pole of the thin film magnetic head part stuck to this face. CONSTITUTION:A floating slider 21 has two side rails 22, and a head sticking face 23 of the slider 21 is formed into a transversely curved surface. A thin film magnetic head part 24 which has a thin film magnetic head 26 formed and has the surface coated with a protective film is stuck to the head sticking face 23 formed into the curved surfce. In this structure, a tensile stress A is aplied in the breadthwise direction of a magnetic pole 27 of the stuck thin film magnetic head 26, and a strain is applied there; and if the magnetic pole 27 consists of, for example, magnetic materials such as an Ni-Fe alloy or the like, the axis of easy magnetization is prescribed easily in the breadthwise direction of the magnetic pole 27 because the direction of the applied strain and the direction of the axis of easy magnetization coincide with each other, and the response speed of magnetization inversion is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION +a+ Technical Field of the Invention The present invention relates to a magnetic head, and in particular to a method for easily aligning the axis of easy magnetization in the magnetic pole width direction of a floating slider or a thin film magnetic head portion fixed to a predetermined surface of a head base. The present invention relates to a configuration of a magnetic head that makes it possible to specify the specifications.

(bl) Background of the Technology In recent years, the magnetic heads of magnetic disk storage devices used as typical file devices in computers and other devices have been miniaturized in line with the increasing density of magnetic recording. Thin-film magnetic heads have been developed and are being put into practical use, and are capable of miniaturization and high-density recording, as well as uniform characteristics and low cost.

However, as the magnetic pole width of thin-film magnetic heads decreases due to higher density recording, it becomes difficult to define the axis of easy magnetization in the width direction of the magnetic pole, and there is a need for a solution to this problem.

Tel Prior Art and Problems Figure 1 is a perspective view for explaining a conventional magnetic head. In the figure, 1 is a floating slider having two sight rails 2, and 3 is a drawer whose surface is covered with a protective layer. This is a thin film magnetic head with terminals.

Generally, a magnetic head with such a structure is produced by forming a large number of thin film magnetic head parts 3 with lead-out terminals directly on a substrate to be a slider, covering them with a protective layer, and then cutting them into individual magnetic sliders. A method of forming the floating slider 1 and the thin-film magnetic head section 3 separately, and then fixing the substrate 5 of the thin-film magnetic head section 3 on a predetermined surface of the floating slider 1 with a bonding agent or the like to integrate them. etc. are obtained.

This thin film magnetic head section 3 has a magnetic pole 4 made of permalloy (Ni-
Because it is made of metallic magnetic materials such as Fe), it has a high saturation magnetic flux density, and because of this, it has a thin film structure with a small cross-sectional area, and the head magnetic field that contributes to magnetic recording is steep, making it an excellent property that allows high-resolution recording. have.

By the way, conventional methods for imparting magnetic anisotropy to the magnetic pole 4 of the thin film magnetic head section 3 include forming the magnetic pole in a magnetic field,
Alternatively, this was done by methods such as heat treatment in a magnetic field, but
In recent years, as the magnetic pole width has decreased due to the increase in recording density of N-film magnetic heads, the shape anisotropy of the magnetic domain in the direction perpendicular to the magnetic pole width has increased regardless of the above-mentioned application methods, making it easier to magnetize the magnetic pole in the width direction. This method has disadvantages in that it becomes difficult to define the axis and the response speed characteristics of magnetization reversal for high-density recording deteriorate.

(dl Purpose of the Invention In order to eliminate the above-mentioned conventional drawbacks, the present invention focuses on the fact that magnetic anisotropy and strain have a close relationship in magnetic materials.
The thin-film magnetic head portion is fixed to a predetermined surface of a floating slider or a slider base with strain always applied to its magnetic pole, and an axis of easy magnetization is easily defined in the width direction of the magnetic pole, The object of the present invention is to provide a novel magnetic head that enables high-speed response of magnetization reversal.

According to the present invention, the structure and object of the invention is to provide a magnetic head comprising a floating slider or a thin film magnetic head section individually formed on a predetermined surface of a head base, the predetermined surface being fixed to a floating slider or a head base. Provided is a magnetic head characterized in that an axis of easy magnetization is defined in the width direction of the magnetic pole by applying strain to the magnetic pole of the thin H'J6F4 magnetic head part which has a curved surface and is fixed thereto. This is achieved by

(fl Embodiments of the Invention Below, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 2 is a schematic perspective view showing an embodiment of the magnetic head according to the present invention.

In the figure, reference numeral 21 denotes a floating slider having two idle rails 22, and the head fixing surface 23 of the slider 21 is laterally curved in this embodiment.

The curved head fixing surface 23 of the slider 21 has a
As shown in the figure, a thin film magnetic head 26 with lead-out terminals is formed on a thin substrate 25, and a thin film magnetic head portion 24 whose surface is covered with a protective film is fixed.

With the above structure, tensile stress A is applied in the width direction of the magnetic pole 27 of the fixed thin film magnetic head 26 as shown in the partially enlarged view of FIG. If the magnetic pole 27 is made of a magnetic material made of a Ni-Fe alloy that contains 81% or more of Ni and has a positive magnetostriction constant, for example, the direction of the impressor and the direction of the axis of easy magnetization coincide, so that the magnetic pole 27 It becomes possible to easily define the axis of easy magnetization as shown by arrow B in the width direction of the magnet.

When the magnetic pole 27 is formed of a magnetic material having a negative magnetostriction constant, the head fixing surface 23 of the floating slider 21 is curved in the vertical direction, and the negative magnetostriction is applied to the curved head fixing surface. If the thin-film magnetic head part, which has magnetic poles having a constant number, is fixed, tensile stress is applied in the direction perpendicular to the magnetic pole width of the fixed thin-film magnetic head as in the above embodiment, and strain is applied. This makes it possible to easily define the axis of easy magnetization in the width direction of the magnetic pole.

Further, in the above-mentioned embodiments, an example in which a positive pressure type floating slider was used was described, but the present invention is not limited to this example, and can also be applied to a slider using negative pressure, etc. Needless to say.

Furthermore, as shown in FIG. 4, a multi-track magnetic head has a structure in which a multi-thin-film magnetic head section 32 in which a large number of thin-film magnetic heads are arranged in parallel on a thin substrate is fixed to a head fixing surface 33 of a sliding head base 31. Of course, it can also be applied to other systems, and similar effects can be obtained.

(gl Effects of the Invention As is clear from the above explanation, according to the structure of the magnetic belly button F according to the present invention, even if a configuration in which the width of the magnetic pole is reduced due to the increase in recording density is adopted, the width of the magnetic pole is It has excellent effects such as making it possible to easily define the axis of easy magnetization in the width direction and achieving high-speed response of magnetization reversal.Therefore, it can be applied to various high-density magnetic heads formed by thin film formation technology. This is extremely advantageous.

[Brief explanation of drawings]

FIG. 1 is a schematic perspective view for explaining a conventional magnetic head, FIG. 2 is a schematic perspective view showing an embodiment of the magnetic head according to the present invention, and FIG. 3 is a partially enlarged view of the magnetic head according to the present invention. The plan view and FIG. 4 are schematic perspective views showing another embodiment of the present invention. In the drawing, 21 is a floating slider, 22 is a sight rail, 23 is a curved head fixing surface, 24 is a thin film magnetic head section, 25 is a thin substrate, 26 is a thin film magnetic head, 27 is a magnetic pole, and 31 is a sliding head base. 32 is a multi-thin film magnetic head section, and 33 is a head fixing surface. A 1 μm thin JiQ material with the same hardness is formed. Next, polishing is performed again by the thickness of the newly formed thin film plus the thickness of the sag of the immuthic thin film. By adding these two steps, (■ It is possible to reduce the spread of the magnetic thin film due to sagging. ■ It is possible to reduce the level difference between the substrate and the magnetic thin J-adhesive.) (Magnetic 9, improved magnetic properties) (Example) The present invention will be described in detail below based on an example. Fig. 1 is a diagram of a single-pole head for perpendicular magnetic recording after polishing. Figure 2 is a cross-sectional view of the product after polishing the head tip and forming a thin film on the polished surface. Figure 3 shows the head tip being polished again after forming a thin film. This is a cross-sectional view of the product in which the 11th IQ is carried out. In the 11th IQ, 1 is a substrate with a magnetic thin film. 3 is a magnetic thin IF 12 is a substrate for protecting the value sensor 3. 4 is a cicada. This is an adhesive layer formed when bonding the substrate 1 with the film and the substrate 2. 5 is the level difference between the head tip polished... 1 and the tip of the magnetic thin film 6, and 6 is the spread bt due to sagging of the magnetic thin film. In Fig. 2, 7 is the thickness of a 1 μm thin film formed on the head tip polished tfIIs.
This is the polishing allowance when polishing again after forming 1 m. The polishing allowance at this time is the thickness of the thin film formed and the tip of the head! I
The distance m1t from the M-polished surface 8 to the point where the 4Fm property A (τ film 6 no longer spreads due to sag) is added. In FIG. The cross section after being polished again is difficult to see. In Figure 1, there was a spread 6 of the magnetic thin film;
By forming a thin film of 111 m and polishing it again, it was found that the thin film had disappeared as shown in Figure 3. In addition, the head tip grinding M [step 5 between the river 8 and the tip of the magnetic thin film 6]
Similarly, I was pleased to see that the step 5 had disappeared. [Effect] As described above, according to the invention, a thin film of 1 μm is formed in the direction of polishing the head tip, and the distance equal to the sum of its thickness and the length from where the head tip is polished until the magnetic thin film no longer sag, By performing polishing again, the spread due to sag of the magnetic thin film and the level difference with the substrate are eliminated. This improved the contact with the media and also prevented deterioration of magnetic properties due to spread due to sagging of the magnetic thin film. Similar effects can also be expected for one-ring type thin film heads and MR heads. From the above, the present invention is highly effective. 4. Fig. 1 Simple explanation of F111 Fig. i, Fig. 2, and Fig. 3 are all drawn using a spherical type #film magnetic head as an example. FIGS. 1, 2, and 3 are cross-sectional views of the thin film repair head viewed from the side. 1...Substrate with thin film magnetism 2...Substrate 5...(Magnetic thin film 4...Adhesive layer 5...Between head tip polishing Step 6 between and magnetic thin film
・・・・・・Expansion due to sagging of the magnetic thin film, width 7...
... Thin film formation thickness 8 ... Head tip polishing direction 9 ... More than the polishing cost when polishing again Applicant Suwa Seikosha Co., Ltd. Agent Patent attorney Tsutomu Mogami

Claims (1)

[Claims] A magnetic head consisting of a floating slider or a head base having individually formed m-film magnetic head sections fixed to a predetermined surface, the predetermined surface having a curved shape, and a magnetic pole of a thin-film magnetic head section fixed thereto. By applying strain to
A magnetic head characterized in that an axis of easy magnetization is defined in the width direction of the magnetic pole.