JPH04339305A - Magnetic head - Google Patents

Abstract

PURPOSE:To provide a magnetic head which is easy to form a coil film, whose magnetic flux leakage can be reduced, which has high efficiency, and which is appropriate for optimizing the respective conditions for write and read. CONSTITUTION:A slider 1 and a magnetic transducing element 2 are incorporated. The magnetic transducing element 2 is provided with a pair of pole parts 211 and 212 and a yoke part 213 with which a magnetic film 21 is faced via a transducing gap 23, and is provided on a slider side face 108 so that the film thickness direction can coincide with a track width direction (b). A coil film 22 is wound around the yoke part 213.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floating magnetic head.

0002

2. Description of the Related Art Floating magnetic heads are widely used for magnetic recording and reproducing in computers because of their large storage capacity and high data transfer speed. A floating magnetic head performs magnetic recording and reproduction while maintaining a minute flying height by using the dynamic pressure generated by the viscosity of air due to relatively high-speed movement between the head and the magnetic storage medium. Typical examples include a Winchester type magnetic head in which a magnetic transducer is mounted on a slider made of a magnetic material, a composite type magnetic head in which a magnetic transducer is inserted into a groove in a slider made of a non-magnetic ceramic structure, and a semiconductor head. There are thin film magnetic heads, etc., in which a thin film element made by a process similar to the manufacturing technology is attached to a ceramic structure.

0003

However, the conventional magnetic head described above has the following problems. (A) So-called bulk-type magnetic heads such as Winchester-type magnetic heads and composite-type magnetic heads require a laborious and complicated coil winding operation in which a coil made of wire is wound around a magnetic material serving as a core. In addition, it is difficult to respond to the miniaturization and narrowing of track width required for high-density recording and the like. (B) In a thin-film magnetic head, the coil film is spirally wound on almost the same surface, which increases the coil area and lengthens the effective length of the conductor, leading to an increase in the coil inductance component and DC resistance value. There is a limit to the improvement of high frequency response. (C) In a thin film magnetic head, leakage flux tends to increase because the opposing areas of the lower magnetic film and the upper magnetic film are large and the spacing between these magnetic films is minute. Therefore, there is a limit to efficiency improvement. (D) Regardless of the type of conventional magnetic head,
Basically, since the magnetic transducer is configured to double as a read/write element, it is not possible to set optimum values for reading and writing. For this reason, there is a limit to performance improvement.

SUMMARY OF THE INVENTION Therefore, the object of the present invention is to solve the above-mentioned conventional problems, to provide a coil film that is easy to form, has little leakage of magnetic flux, is highly efficient, and has optimized write and read conditions. It is an object of the present invention to provide a magnetic head suitable for

[0005]

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention provides a magnetic head including a slider and a magnetic transducer, wherein the slider has an air bearing surface on one side. , the magnetic conversion element has a magnetic film and a coil film, the magnetic film has a pair of pole parts facing each other with a conversion gap in between, and a yoke part connected to the pair of pole parts, and When the air outflow direction and the track width direction perpendicular to the air outflow direction are assumed to be on the bearing surface, the coil film is provided on the slider side surface so that the film thickness direction coincides with the track width direction, and the coil film is formed around the yoke part. It is characterized by a rolled arrangement.

[0006]

[Operation] The magnetic transducer element is a thin film element that has a magnetic film and a coil film, so unlike so-called bulk type magnetic heads such as conventional Winchester type magnetic heads and composite type magnetic heads, it differs from so-called bulk type magnetic heads such as conventional Winchester type magnetic heads and composite type magnetic heads. There is no need for the troublesome and complicated coil winding work of winding the coil around the core magnetic material. Furthermore, since it is a thin film element, it can easily accommodate miniaturization, narrow track width, high-density recording, and the like.

The magnetic conversion element is provided on the side surface of the slider parallel to the air outflow direction, and since the thickness direction of the magnetic film coincides with the track width direction, the track width depends on the film thickness accuracy of the magnetic film. A magnetic head suitable for high-density recording can be obtained by setting the thickness to a predetermined, highly accurate minute thickness.

The coil film is wound around the yoke portion of the magnetic film on the side surface of the slider. Therefore, the effective length of the conductor is shortened, the inductance component and DC resistance value of the coil are reduced, and the high frequency response is improved. Furthermore, leakage of magnetic flux between magnetic films is reduced, improving efficiency.

[0009] The magnetic transducer element has, on the side surface of the slider,
Two types of write-only and read-only tracks can be formed separately on the same track. Therefore, each condition individually required for writing and reading can be optimized.

0010

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a perspective view of a magnetic head according to the present invention, FIG. 2 is an enlarged perspective view of a magnetic conversion element portion, and FIG. 3 is an enlarged perspective view of a slider portion provided with a magnetic conversion element. In the figure, 1 is a slider and 2 is a magnetic conversion element. Slider 1 is a ceramic structure. Examples of ceramic structures that can be used include SiO2, Al2O3-TiC, S
i, photoceram, etc. slider 1
When a Si substrate is used, the read/write circuit can be formed directly on the slider 1. The slider 1 has rail portions 101 and 102 on one side that is the medium facing surface side. The surfaces of the rail parts 101 and 102 are air bearing surfaces 103 and 104 with high flatness. Reference numerals 105 and 106 indicate tapered portions, and a indicates an air outflow direction in combination with a medium. Although not shown, it may be a planar air bearing surface without a rail portion.

The magnetic transducer element 2 has a magnetic film 21 and a coil film 22, and is provided on the slider side surface 108 parallel to the air outflow direction a. Since the magnetic conversion element 2 is a thin film element, unlike so-called bulk type magnetic heads such as conventional Winchester-type magnetic heads and composite-type magnetic heads, there is no need for the trouble of winding a coil made of wire around the magnetic material that serves as the core. This eliminates the need for complicated coil winding work. In addition, since it is a thin film, it can be easily adapted to miniaturization, narrow track width, high-density recording, etc.

The magnetic film 21 has a pair of pole parts 211 and 212 facing each other with a conversion gap 23 in between, and a pole part 2
11 and 212, and the film thickness direction coincides with the track width direction b perpendicular to the air outflow direction a. Therefore, the track width is set to a highly accurate minute thickness determined by the thickness accuracy of the magnetic film 21, and a magnetic head suitable for high-density recording is obtained. The magnetic film 21 is made of a permalloy film, sendust, amorphous, or the like.

The coil membrane 22 is wound around the yoke portion 213. That is, they are wound in a spiral manner sequentially from the lower side of the yoke portion 21 to the upper side and from the upper side to the lower side. With such a structure, the conductor effective length of the coil film 22 is shortened, the coil inductance component and the DC resistance value are reduced, and the high frequency response is improved. Also, unlike conventional thin-film magnetic heads, leakage of magnetic flux is reduced and efficiency is improved. The coil film 22 is made of a material with good conductivity such as copper. 221 and 222 are coil membranes 2
This is the extraction electrode connected to 2.

In the embodiment, the pole portion 2 of the magnetic film 21
11 and 212 are arranged inside recesses 109 and 110 provided in the slider side surface 108, respectively. The conversion gap 23 is constituted by the slider member left between the recesses 109-110. As a result, the pole part 2
11 and 212 and the conversion gap 23 form the recess 1
It is set to a high precision value determined by the precision of 09 and 110.

FIG. 4 is a diagram showing another embodiment of the magnetic head according to the present invention. This embodiment shows an example in which two types of magnetic transducers, a write-only magnetic transducer 2A and a read-only magnetic transducer 2B, are formed on the slider side surface 108. The magnetic transducer elements 2A, 2B are formed so that the transducer gaps 23, 23 are located on the same track. This results in
In each of writing and reading, each individually required condition can be set to an optimal value.

FIGS. 5 to 11 show examples of manufacturing steps for the magnetic head according to the present invention. First, as shown in FIG. 5, pole parts 211 and 212 are formed on one surface of a substrate 1 that will become a slider. The pole parts 211 and 212 can be formed by a film forming technique such as sputtering or a plating technique. The substrate 1 is a wafer, and a large number of magnetic heads are formed on one surface thereof. Recesses (reference numerals 109 and 110 in FIG. 3) are formed in advance in the positions of the substrate 1 where the pole parts 211 and 212 are to be formed. The recess can be formed by means such as ion milling.

Next, as shown in FIG.
, 212 is formed so as to cover the ends thereof. The insulating film 31 may be either an organic insulating film or an inorganic insulating film. In the case of organic insulating films, high precision pattern forming techniques such as photolithography can be applied. The inorganic insulating film can be formed by sputter deposition technology.

Next, as shown in FIG. 7, the lower coil film 22
After forming A, an insulating film 32 is formed as shown in FIG. The lower coil film 22A can be formed by sputtering, plating, or the like. The insulating film 32 is provided so that both ends of the lower coil film 22A are exposed.

Next, as shown in FIG. 9, a yoke portion 213 is formed on the insulating film 32 by means such as sputtering. The yoke portion 213 is provided so that both ends overlap the pole portions 211 and 212. Next, as shown in FIG. 10, an insulating film 33 is formed to cover the entire yoke portion 213, and then an upper coil film 22B is formed on the insulating film 33. Both ends of the upper coil film 22B are connected to the ends of the lower coil film 22B so that a coil film that spirals around the yoke portion 213 is formed. After this, an insulating film and a protective film are formed to cover the entire structure. When the magnetic transducer element is formed on a wafer, a magnetic head piece is obtained by cutting the wafer, grooving the wafer, and the like.

[0020] The above manufacturing process is just an example, and it goes without saying that various processes can be used.

[0021]

[Effects of the Invention] As described above, according to the present invention, the following effects can be obtained. (a) Since the magnetic conversion element has a magnetic film and a coil film, unlike bulk type magnetic heads such as conventional Winchester-type magnetic heads and composite-type magnetic heads, there is no need for coil winding work, and the device is compact. Accordingly, it is possible to provide a magnetic head that can cope with increasing size, narrowing of track width, high-density recording, etc. (b) The magnetic film constituting the magnetic transducer element has a pair of pole parts facing each other across a transducer gap and a yoke part connected to the pair of pole parts, and the film thickness direction is aligned with the track width direction. , since it is provided on the side of the slider.
It is possible to provide a magnetic head that has a highly accurate minute track width determined by the film thickness accuracy and is suitable for high-density recording. (c) Since the coil film is wound around the yoke part of the magnetic film provided on the side surface of the slider, the effective length of the conductor is shortened, the coil inductance component and DC resistance value are low, and high frequency response is achieved. Excellent, with little leakage of magnetic flux,
A highly efficient magnetic head can be provided. (d) Since two types of magnetic transducer elements, one for writing only and one for reading only, can be formed separately on the same track, it is possible to provide a magnetic head with optimized write and read conditions.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a magnetic head according to the present invention.

FIG. 2 is an enlarged perspective view of a magnetic transducer element portion of a magnetic head according to the present invention.

FIG. 3 is an enlarged perspective view of the slider of the magnetic head according to the present invention.

FIG. 4 is a perspective view of another embodiment of the magnetic head according to the present invention. 5 to 11 are diagrams illustrating an example of the manufacturing process of a magnetic head according to the present invention.

[Explanation of symbols]

1 slider 10
3,104 Air bearing surface 2
Magnetic conversion element 21
Magnetic film 22
Coils 211, 212 Pole part

Claims (2)

[Claims] 1. A magnetic head including a slider and a magnetic transducer, wherein the slider has an air bearing surface on one side, and the magnetic transducer includes a magnetic film and a coil film. the magnetic film has a pair of pole parts facing each other with a conversion gap in between, and a yoke part connected to the pair of pole parts, and the air bearing surface has an air outflow direction and a track width direction perpendicular thereto. A magnetic head characterized in that the coil film is provided on a side surface of a slider so that the film thickness direction coincides with the track width direction when imagined, and the coil film is wound around the yoke portion. 2. The magnetic head according to claim 1, wherein the pole portion is disposed within a recess provided on a side surface of the slider.