JPH0319119A - Floating magnetic head - Google Patents

Abstract

PURPOSE:To improve abrasion resistance and shock resistance and to obtain a superior recording/reproducing characteristics by constituting a magnetic core by means of a high saturated magnetic flux density metallic magnetic film having a thickness equivalent to a track width, sandwiching it with non-magnetic substrates and causing a medium corresponding face to face an intra-floating face/sliding face formed in a non-magnetic body. CONSTITUTION:The whole core 2 is constituted of the metallic magnetic film 3 of high- saturated magnetic flux density, which has the thickness equivalent to the track width, and the film 3 is sandwiched by the non-magnetic substrates 9 and the medium corresponding face having the magnetic gap 4 of the magnetic core 2, namely, the most part of a track face is caused to face the floating face 7 in the non-magnetic substrate 9. Thus, the track width is specified by the thickness of the magnetic film 3. Consequently, the magnetic head of the narrow track width can be obtained and the recording/reproducing characteristics can be obtained by using the metallic magnetic material having high saturated magnetic flux density. Thus, high linear recording density is attained with the narrow track width and a mechanical characteristic such as abrasion resistance and shock resistance is improved since the slider floating face 7 consists of the non-magnetic material of high mechanical strength even if the stop of contact starting is repeated for the recording medium such as the magnetic disk.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a floating magnetic head used in a fixed magnetic disk device, which is a magnetic recording device for, for example, a computer.

Traditionally, the magnetic head used in fixed magnetic disk drives is a monolithic type in which the slider part and the core part are made of the same magnetic material, and is also known as a Winchester head. As shown in FIG.
Integrated by glass bonding, recording/reproducing gap 3
It has a structure that forms 3.

A specific example of such publicly known information is, for example, Sogo Gijutsu Shuppan! "Latest Magnetic Recording Technology and Equipment" published in 384
There is a similar description on page 17.

■ f ゝ: By the way, the above-mentioned conventional monolithic type floating magnetic heads are made of materials such as In-Zn.
, Nl-Zn, and other ferrites. This material does not have a satisfactory saturation magnetic flux density and can only generate a weak recording magnetic field, so in order to achieve high-density recording,
It was insufficient. In addition, when used in a magnetic disk recording device that starts and stops by contact with the recording medium, wear resistance,
There were problems with mechanical properties such as impact resistance.

This invention is proposed to solve the above problem, and the floating magnetic head of this invention has a magnetic core made of a high saturation magnetic flux density metal magnetic film having a thickness corresponding to the track width, This is sandwiched between non-magnetic substrates, and the medium-compatible surface of the magnetic core having a magnetic gap faces into the air bearing surface and sliding surface formed of the non-magnetic material.

According to the above-mentioned configuration, even if the contact starts and stops repeatedly with respect to a recording medium such as a magnetic disk, the main contact part is the slider air bearing surface made of a non-magnetic material with high mechanical strength, which is different from conventional ferrite. Compared to monolithic types, mechanical properties such as wear resistance and impact resistance are dramatically improved. In addition, since the track width can be determined by the thickness of the magnetic film,
A magnetic head with a narrow track width can be easily obtained. Furthermore, since a metal magnetic film with a high saturation magnetic flux density is used, excellent recording and reproducing characteristics can be obtained, and in particular, a recording magnetic field strength sufficient to achieve high recording density can be obtained.

Tsubanejung The present invention will be explained below with reference to the drawings.

FIG. 1 is a perspective view of a floating magnetic head according to an embodiment of the present invention. In the figure, 1 is a Fe-Si-AI alloy film exhibiting extremely high saturation magnetic flux density characteristics. -T
The slider section 2 has an I-shaped core sandwiched between non-magnetic substrates 1a made of IC or the like. ．．
C-shaped core sandwiched between non-magnetic substrates made of 03TtC etc.
3 is Fe-Si-A formed by sputtering
4 is a magnetic gap, 5 is a winding window, 6 is a coil,
7 is the slider air bearing surface of the slider part 1, 8 is a groove that serves as an air bearing to induce the head to fly, and 9 is an AI203TIC.
10 is a center track formed by an extension of an I-shaped core, and 11 is a tapered portion.

Next, the operation of the above floating magnetic head will be explained.

According to the above configuration, most of the slider air bearing surface 7 is made of a non-magnetic material with high mechanical strength, so that it has excellent wear resistance even when repeatedly started and stopped for recording media such as magnetic disks. Mechanical properties such as impact resistance can be improved,
Moreover, by configuring the entire magnetic core with a metal magnetic film 3 having a high saturation magnetic flux density formed by sputtering, there is an advantage that a magnetic head suitable for high-density recording with a narrow track width can be manufactured.

FIG. 2 is a perspective view of a second embodiment of the invention. This embodiment is similar to the first embodiment except that it has a magnetic core made of a metal magnetic film with a high saturation magnetic flux density on each of the slider air bearing surfaces 7a and 7b. Therefore, the same parts are given the same reference numerals and the explanation thereof will be omitted. In this example, is the slider air bearing surface? a,7
By providing the magnetic cores 3, 3 on the recording medium b, there is an advantage that the magnetic head can be attached to either side of the recording medium when it is attached to a fixed magnetic disk device.

As explained above, this invention consists of a metal magnetic film with a thickness corresponding to the track width and a high saturation magnetic flux density, which constitutes the entire core, which is sandwiched between non-magnetic substrates. By making most of the medium-compatible surface of the magnetic core with a magnetic gap, that is, the track surface, face the air bearing surface using a non-magnetic substrate, the track width can be defined by the thickness of the magnetic film, making it possible to achieve a narrow track width. A magnetic head can be obtained, and excellent recording and reproducing characteristics can be obtained by using a magnetic metal material having a high saturation magnetic flux density. In particular, high linear recording density can be achieved with a narrow track width. In addition, because the slider flying surface is made of non-magnetic material that has high mechanical strength even if it is repeatedly started and stopped by contact with recording media such as magnetic disks, mechanical properties such as wear resistance and impact resistance are dramatically improved. effective.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a first embodiment of the floating magnetic head of the present invention, and FIG. 2 is a perspective view of a second embodiment of the floating magnetic head of the present invention.
FIG. 3 is a perspective view of a conventional floating magnetic head. DESCRIPTION OF SYMBOLS 1... Slider part, la... Non-magnetic substrate, 2... C-shaped core, 3... Metal magnetic film with high saturation magnetic flux density, 4... Magnetic gap, 5... Winding wire Window, 6・●・ko. 7...Slider air bearing surface, 7a*7b...Slider air bearing surface, 8...Groove, 9...Nonmagnetic substrate, 10...Center track, 1l...Tapered part .

Claims (1)

[Claims] The entire magnetic core is composed of a metal magnetic film with a high saturation magnetic flux density and a thickness corresponding to the track width, and this is sandwiched between non-magnetic substrates, and the track surface is the medium-compatible surface with a magnetic gap of the magnetic core. What is claimed is: 1. A floating magnetic head, characterized in that a floating magnetic head faces an air bearing surface and a sliding surface formed on a non-magnetic substrate.