JPH0896315A - Magnetic head chip, magnetic head device for fixed disk drive, and manufacture of magnetic head device for fixed disk drive - Google Patents

Abstract

PURPOSE: To set the distance from a magnetic gap on the surface opposite to a recording medium to an inclined side part small by a simple method without reducing the cross-sectional area of a magnetic circuit. CONSTITUTION: On a core half 22, the inclined side part 16 inclined at a 1st angle θ to the recording medium surface is formed in a position at a distance A1 from the magnetic gap 12 on the surface opposite to the recording medium, and also a bottom side part 17 continued to this inclined side part and inclined at a 2nd angle smaller than the 1st angle to the recording medium surface is formed. Thus, a small distance can be set between the magnetic gap on the surface opposite to the recording medium and the inclined side part without reducing the cross-sectional area of the magnetic circuit by a simple method.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic head chip having a magnetic gap formed facing a recording medium to form a magnetic circuit, a magnetic head device for a fixed disk drive equipped with this magnetic head chip, and a fixed magnetic head device. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a magnetic head device for a disk drive, particularly a magnetic head chip capable of increasing magnetic efficiency in a simple manufacturing process, a fixed disk drive magnetic head device including the magnetic head chip, and a fixed head magnetic head device. Manufacturing method.

[0002]

2. Description of the Related Art Conventionally, fixed disk drive (HDD)
In a magnetic head device for use, recording / reproducing of information is performed on a rotating magnetic disk in a state where a ceramic slider provided with a magnetic head chip is slightly floated by an air bearing effect.

FIG. 7 is a perspective view showing such a conventional HDD magnetic head device.

In FIG. 7, reference numeral 71 is a ceramic slider, and a magnetic head chip 81 is attached to one end of the side surface of the ceramic slider 71 by a bonding glass with a magnetic gap 82 facing the recording medium side.

On the side of the magnetic head chip 81 at one end of the ceramic slider 71, a winding groove 73 is formed at a position communicating with the winding groove 83 of the magnetic head chip 81.

On the recording medium side of one end of the ceramic slider 71 and one end of the magnetic head chip 81, inclined portions 74 and 84 are formed by a diamond blade or the like.

A cutout 85 is formed on the recording medium side of the other end of the magnetic head chip 81.

FIG. 8 is a side view showing the magnetic head chip 81 before being attached to the ceramic slider 71 of FIG.

In FIG. 8, reference numerals 91 and 92 are core halves made of an oxide magnetic material such as ferrite. The abutting surfaces of the core halves 91 and 92 are connected by fusion bonding of quartz glass 93. Has been done. As a result, the silica glass 93 is filled in the magnetic gap 82 and the back gap 94.

In the inner part of the magnetic gap 82 of the core halves 91 and 92, the oxide magnetic material is removed so that the magnetic flux is cut out.
96 are formed respectively. These notches 95, 9
6 is formed to converge the magnetic flux at the magnetic gap 82. Winding grooves 97 and 98 are formed at the inner sides of the cutout portions 95 and 96 of the core halves 91 and 92, respectively.
The winding grooves 97 and 98 form the winding groove 83 shown in FIG. 7.

In the core half body 92, a hypotenuse portion inclined at an angle θ2 with respect to the recording medium surface is formed as a notch 85 at a position spaced a distance A2 from the magnetic gap 82 on the surface facing the recording medium. .

In such a conventional HDD magnetic head device, after the magnetic head chip 81 is attached to the ceramic slider 71, the surfaces of the ceramic slider 71 and the magnetic head chip 81 facing the recording medium are removed to a predetermined depth. While forming the sliding surface of the recording medium, the inclined portions 74 and 84 are simultaneously formed by a diamond blade or the like. These inclined portions 74 and 84 are formed in a required shape in order to stabilize the floating amount with respect to the recording medium.

On the other hand, the notch portion 85 is shown in FIG. 8 before the magnetic head chip 81 is attached to the ceramic slider 71.
It is processed at the stage shown in. Here, in order to reduce the inductance of the magnetic head chip 81, the distance A2 is set small. If the distance A2 is simply reduced, the distance B2 from the notch 85 to the winding groove 98 is reduced, and the cross-sectional area of the core that serves as the magnetic circuit is reduced, so that the head efficiency of the magnetic head chip 81 is reduced.

In order to increase the distance B2, the notch 85
When the angle θ2 is reduced, the angle at which the magnetic head chip 81 is cut with a diamond blade or the like becomes small when the cutout portion 85 is formed, which makes processing difficult.

[0015]

In the above-mentioned conventional magnetic head chip, in order to reduce the inductance of the magnetic head chip, the magnetic head chip is inclined at a predetermined angle from the magnetic gap on the surface facing the recording medium. When the distance to the hypotenuse is set to be small, the distance from the cutout to the winding groove is small, and the cross-sectional area of the magnetic circuit is small, so that the head efficiency of the magnetic head chip is reduced.

According to the present invention, the above problems can be eliminated and the distance to the magnetic gap and the hypotenuse of the surface facing the recording medium can be set small by a simple method without reducing the cross-sectional area of the magnetic circuit. Magnetic head chip, magnetic head device for fixed disk drive, and manufacturing method of magnetic head device for fixed disk drive.

[0017]

According to another aspect of the present invention, there is provided a magnetic head chip having a hypotenuse portion inclined at a first angle with respect to a surface of a recording medium on a surface facing the recording medium. It is characterized in that a bottom portion which is continuous with the slope portion and is inclined at a second angle smaller than the first angle with respect to the recording medium surface is formed.

In the magnetic head chip according to the second aspect of the present invention, a slanted portion inclined at a first angle with respect to the surface of the recording medium is formed on the surface facing the recording medium, and the slanted portion is continuous with the slanted portion. It is characterized in that a bottom portion which is parallel to the surface of the recording medium is formed.

According to a third aspect of the present invention, there is provided a magnetic head device for a fixed disk drive, which comprises a slider part which floats slightly above the recording medium by an air bearing effect, and a slider part which is integrated with the slider part and faces the recording medium. Forming a magnetic circuit with a magnetic gap formed on the recording medium, and forming a hypotenuse on the surface facing the recording medium at a first angle with respect to the recording medium surface, And a magnetic head chip that continuously forms a bottom portion inclined at a second angle smaller than the first angle with respect to the recording medium surface.

According to a fourth aspect of the present invention, there is provided a method of manufacturing a magnetic head device for a fixed disk drive, wherein a side of a magnetic head chip facing a recording medium is inclined at a first angle with respect to the surface of the recording medium. And a bottom part that is continuous with the oblique side and is inclined at a second angle smaller than the first angle with respect to the recording medium surface, and the first manufacturing step. A second manufacturing step for attaching the magnetic head chip having the oblique side and the bottom side formed in the step to the slider section, and facing the recording medium of the slider section and the magnetic head chip integrated in the second manufacturing step The surface to be recorded is deleted to a predetermined depth to form a recording medium sliding surface, and the air bearing effect for the recording medium is stabilized on the recording medium sliding surface side of the slider portion and the end of the magnetic head chip. Characterized by comprising a third manufacturing step of forming a notch for.

[0021]

According to the structure of the present invention, the oblique side inclined at the first angle with respect to the surface of the recording medium is formed on the surface facing the recording medium, and the oblique side is continuous with the recording. Since the bottom portion inclined at the second angle smaller than the first angle with respect to the medium surface is formed, the magnetic field of the surface facing the recording medium can be formed by a simple method without reducing the cross-sectional area of the magnetic circuit. The distance between the gap and the hypotenuse can be set small.

According to the second aspect of the present invention, the recording medium is provided with a hypotenuse portion inclined at the first angle with respect to the recording medium surface on the surface facing the recording medium, and the recording is continuous with the hypotenuse portion. Since the bottom part that is parallel to the medium surface is formed, the distance between the magnetic gap and the hypotenuse part of the surface facing the recording medium can be set small by a simple method without reducing the cross-sectional area of the magnetic circuit. You can

According to a third aspect of the present invention, the magnetic head chip has a surface facing the recording medium, and a slanted portion inclined at a first angle with respect to the surface of the recording medium is formed, and the slanted portion is continuous with the slanted portion. The first side of the recording medium surface.
Since the bottom portion inclined at the second angle smaller than the angle is formed, the distance between the magnetic gap and the hypotenuse portion of the surface facing the recording medium can be reduced by a simple method without reducing the cross-sectional area of the magnetic circuit. Can be set small.

According to the structure described in claim 4, in the first manufacturing process, the hypotenuse portion inclined at the first angle with respect to the recording medium surface is formed on the surface of the magnetic head chip facing the recording medium. However, since the bottom portion which is continuous with the oblique side and is inclined at the second angle smaller than the first angle with respect to the recording medium surface is formed, the cross-sectional area of the magnetic circuit can be reduced by a simple method. Without doing so, the distance between the magnetic gap on the surface facing the recording medium and the hypotenuse can be set small.

[0025]

The present invention will be described in detail below with reference to the embodiments shown in the drawings.

1 and 2 show an embodiment of the magnetic head chip and the magnetic head device for a fixed disk drive according to the present invention. FIG. 1 is a side view of the magnetic head chip, and FIG. 2 is the magnetic head chip of FIG. FIG. 3 is a perspective view of a magnetic head device for a fixed disk drive using the.

First, the magnetic head device for a fixed disk drive will be described with reference to FIG.

In FIG. 2, reference numeral 31 denotes a ceramic slider which serves as a slider portion. At one end of the side surface of the ceramic slider 31, the magnetic head chip 11 directs the magnetic gap 12 toward the recording medium by the bonding glass. It is stuck.

On the side of the magnetic head chip 11 at one end of the ceramic slider 31, a winding groove 33 is formed at a position communicating with the winding groove 13 of the magnetic head chip 11.

On the recording medium side at one end of the ceramic slider 31 and the magnetic head chip 11, inclined portions 34 and 14 are formed by a diamond blade or the like. These inclined portions 34 and 14 are formed in a required shape in order to stabilize the floating amount with respect to the recording medium.

A boat-shaped notch 15 is formed on the recording medium side of the other end of the magnetic head chip 11.

Next, the magnetic head chip 11 before being attached to the ceramic slider will be described with reference to FIG.

In FIG. 1, reference numerals 21 and 22 denote magnetic head chips 11 made of an oxide magnetic material such as ferrite.
The core halves are joined together, and the abutting surfaces of the core halves 21, 22 are connected by fusion bonding of the quartz glass 23. Thereby, the magnetic gap 12 and the back gap 2
4 is filled with quartz glass 23.

Notches 25 and 26 for removing the oxide magnetic material and converging the magnetic flux are formed in the inner part of the magnetic gap 12 of the core halves 21 and 22, respectively.
The winding grooves 27,
28 are formed respectively. The winding grooves 27 and 28 are
The winding groove 13 shown in FIG. 2 is configured.

The core half 22 is formed with a hypotenuse portion 16 inclined at a first angle θ1 with respect to the recording medium surface at a position spaced a distance A1 from the magnetic gap 12 on the surface facing the recording medium. The ship-shaped notch 15 is formed by forming a bottom portion 17 which is continuous with the oblique side portion 16 and is inclined at a second angle smaller than the first angle with respect to the recording medium surface. .

Here, in the present embodiment, the cross section of the core halves 21 and 22 forming the magnetic circuit, which is orthogonal to the magnetic flux, has the cutout 25,
Since it is preferable to be as constant as possible outside the portion where 26 is formed, the second angle of the bottom portion 17 is 0.
The degree 17 is adopted so that the bottom portion 17 is parallel to the surface of the recording medium.

A method for manufacturing such a magnetic head device for a fixed disk drive will be described below.

First, in the first manufacturing process, the magnetic gap 1 on the surface of the magnetic head chip 11 that faces the recording medium.
The hypotenuse portion 16 is formed with a diamond blade or the like at a position apart from the distance A1 by 2 and the bottom portion 17 continuous to the hypotenuse portion 16 is formed with the diamond blade or the like to form the boat-shaped notch 15. There is.

Next, in the second manufacturing step, the magnetic head chip 11 having the oblique side portion 16 and the bottom side portion 17 formed in the first manufacturing step is attached to the ceramic slider 31.

Next, in the third manufacturing process, the surfaces of the ceramic slider 31 and the magnetic head chip 11 integrated with each other in the second manufacturing process, which face the recording medium, are removed to a predetermined depth, and finally, The recording medium sliding surface is formed, and the inclined portions 34 and 14 are simultaneously formed by a diamond blade or the like.

In FIG. 3, after the magnetic head chip 11 is attached to the ceramic slider 31, the magnetic head chip 11 is attached.
It is explanatory drawing which shows the process performed to.

In FIG. 3, a broken line indicates a portion where the magnetic head chip 11 is deleted after the magnetic head chip 11 is attached to the ceramic slider 31. The surface of the magnetic head chip 11 facing the recording medium is deleted to the depth of the final recording medium sliding surface 29 and also to the position of the inclined portion 14. The bottom portion 17 of the boat-shaped notch portion 15 may be located on the inner side of the final recording medium sliding surface 29, and the bottom portion 17 is formed to increase the distance B1 from the bottom portion 17 to the winding groove 28. It is desirable to be close to the final recording medium sliding surface 29. Further, by removing the magnetic head chip 11 to the depth of the recording medium sliding surface 29, the distance from the magnetic gap 12 to the hypotenuse portion 16 is extended from A1 to A0.

The first angle θ1 which is the inclination angle of the oblique side portion 16 with respect to the recording medium surface may be the same as or smaller than the inclination angle θ0 of the notch portion 26 with respect to the recording medium surface. By setting in this way, the magnetic gap 1 is formed in the portion where the hypotenuse portion 16 is formed in the core half body 22.
It is possible to prevent the cross-sectional area from decreasing by moving away from 2.

According to such an embodiment, the notch 15 formed in the core half 22 of the magnetic head chip 11 in the ceramic slider 31 has a hypotenuse inclined at the first angle θ1 with respect to the recording medium surface. 16 and a bottom portion 17 which is continuous with the hypotenuse portion 16 and is inclined at a second angle smaller than the first angle with respect to the recording medium surface. When the first half angle A1 which is the inclination angle of the hypotenuse portion 16 is set large in order to easily process the hypotenuse portion 16 while the 16 distance A0 is set small, Since the cross-sectional area between the bottom portion 17 and the winding groove 28 can be set large, the distance between the magnetic gap and the oblique side portion of the surface facing the recording medium can be reduced by a simple method without reducing the cross-sectional area of the magnetic circuit. Can be set smaller Wear. This makes it possible to easily manufacture a magnetic head chip having a high head efficiency and a magnetic head device for a fixed disk drive.

FIG. 4 is a side view showing another embodiment of the magnetic head chip according to the present invention. The same components as those of the embodiment of FIG. 3 are designated by the same reference numerals and their description is omitted.

In FIG. 4, the magnetic head chip 41 is
The magnetic gap 1 is formed on the hypotenuse portion 46 of the boat-shaped notch 45.
It is formed up to a position exceeding 2. However, since the surface of the magnetic head chip 41 facing the recording medium is deleted to the final depth of the recording medium sliding surface 29 and also to the position of the inclined portion 14, finally, the oblique side portion is formed. The recording medium sliding surface can be secured between the magnetic gap 12 and the magnetic gap 46.

Also in such an embodiment, the same effect as that of the embodiment of FIG. 1 can be obtained.

FIG. 5 is a side view showing another embodiment of the magnetic head chip according to the present invention. The same components as those of the embodiment of FIG. There is.

In FIG. 5, the core half 22 of the magnetic head chip 51 on which the boat-shaped notch 15 is formed is the same as that of the embodiment of FIG. 1, but the boat-shaped notch 15 is not formed. The core half body 52 is formed in a quadrangular prism shape without winding grooves or notches.

Also in such an embodiment, the same effect as that of the embodiment of FIG. 1 can be obtained.

FIG. 6 is a side view showing still another embodiment of the magnetic head chip according to the present invention. The same components as those of the embodiment of FIG. 1 are designated by the same reference numerals and their description is omitted. ing.

In FIG. 6, the core half 62 of the magnetic head chip 61 is formed with a ship-shaped cutout 55 similar to the cutout 15 of the core half 22.

Also in such an embodiment, the same effect as that of the embodiment of FIG. 1 can be obtained.

In the embodiment of FIG. 1, the magnetic head chip of the present invention is applied to a magnetic head device for a fixed disk drive which requires a small magnetic head chip for high density recording, but other magnetic heads are used. It may be applied to a device such as a video tape recorder. In the embodiments of FIGS. 1 to 6, the oxide magnetic body is used for the core half body, but other magnetic bodies such as a metal magnetic body may be used. In the embodiment of FIG. 2, a ceramic slider is used for the slider portion, but various sliders made of hard resin can be applied.

[0055]

According to the present invention, the distance to the magnetic gap and the hypotenuse portion of the surface facing the recording medium can be set small by a simple method without reducing the cross-sectional area of the magnetic circuit. A magnetic head chip having a high head efficiency and a magnetic head device for a fixed disk drive can be easily manufactured.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a magnetic head chip according to the present invention.

FIG. 2 is a perspective view showing a magnetic head device for a fixed disk drive using the magnetic head chip of FIG.

3A and 3B are explanatory views showing processing performed on the magnetic head chip of FIG.

FIG. 4 is a side view showing another embodiment of the magnetic head chip according to the present invention.

FIG. 5 is a side view showing another embodiment of the magnetic head chip according to the present invention.

FIG. 6 is a side view showing still another embodiment of the magnetic head chip according to the present invention.

FIG. 7 is a perspective view showing a conventional magnetic head device for a fixed disk drive.

8 is a side view showing the magnetic head chip before being attached to the ceramic slider of FIG. 7. FIG.

[Explanation of symbols]

 11 Magnetic Head Chip 12 Magnetic Gap 15 Notch 16 Oblique Side 17 Bottom Side 21,22 Core Half 24 Back Gap 27,28 Winding Groove

Claims (4)

[Claims] 1. A magnetic head chip having a magnetic gap formed facing a recording medium to form a magnetic circuit, wherein a surface facing the recording medium has a first angle with respect to the surface of the recording medium. A magnetic head characterized by forming an inclined hypotenuse portion, and forming a bottom portion which is continuous with the inclined hypotenuse portion and is inclined at a second angle smaller than the first angle with respect to the recording medium surface. Chips. 2. A magnetic head chip having a magnetic gap formed facing a recording medium to form a magnetic circuit, wherein a surface facing the recording medium has a first angle with respect to the surface of the recording medium. A magnetic head chip, characterized in that an inclined hypotenuse portion is formed, and a bottom portion that is continuous with the hypotenuse portion and is parallel to the recording medium surface is formed. 3. A magnetic circuit is formed by comprising a slider portion that floats up on the recording medium by a small amount due to an air bearing effect, and a magnetic gap integrally formed with the slider portion and facing the recording medium. Then, a hypotenuse portion that is inclined at a first angle with respect to the recording medium surface is formed on a surface facing the recording medium, and the hypotenuse portion is continuous with the hypotenuse portion and the first side is formed on the recording medium surface. A magnetic head device for a fixed disk drive, comprising: a magnetic head chip forming a bottom portion inclined at a second angle smaller than the angle. 4. A magnetic head chip is formed with a hypotenuse portion inclined at a first angle with respect to the recording medium surface on a surface facing the recording medium, and the hypotenuse portion is continuous with the hypotenuse portion and is opposite to the recording medium surface. A first manufacturing step of forming a bottom portion inclined at a second angle smaller than the first angle, and a magnetic head chip having the slanted portion and the bottom portion formed in the first manufacturing step, a slider portion And a second manufacturing step of attaching to the recording medium and a surface of the slider portion and the magnetic head chip, which are integrated in the second manufacturing step, facing the recording medium are deleted to a predetermined depth to form a recording medium sliding surface. And a third manufacturing step of forming a notch for stabilizing the air bearing effect on the recording medium on the slider sliding surface side of the slider portion and the end of the magnetic head chip. Characterized fixed device Method of manufacturing a magnetic head device for disk drives.