JPH04109409A - Magnetic head and its manufacturing method - Google Patents

Abstract

PURPOSE:To allow the high-reliability recording and reproducing to and from a metallic magnetic recording medium by disposing porous oxide material contg. solid lubricant into a part of the sliding part of the magnetic head adjacent to the metallic magnetic recording medium. CONSTITUTION:The porous oxide material 6 contg. the solid lubricant is disposed in the sliding part of the magnetic head in contact with the metallic magnetic recording medium exclusive of magnetic thin film parts 1 having a multilayered structure. Even if, therefore, the metallic magnetic tape is run in low-humidity environment, the solid lubricant in the porous oxide material 6 is intermittently supplied into the sliding part and the magnetic thin films having the multilayered structures and the metallic magnetic recording medium can execute smooth traveling. Then, the seizure on the magnetic thin film 1 having the multilayered structure is substantially prevented and the drastic decrease in the magnetic head output is lessened. The high-reliability recording and reproducing to and from the metallic magnetic recording medium are executed in this way.

Description

Detailed Description of the Invention Field of the Invention The present invention relates to a magnetic head applied to a metal magnetic recording medium containing metal magnetic powder and a metal thin film magnetic recording medium having a magnetic thin film as a magnetic layer, and a method for manufacturing the same. It is something.

BACKGROUND OF THE INVENTION In the field of magnetic recording, higher recording densities are being achieved through improvements in magnetic recording media and magnetic heads.

Taking magnetic recording media as an example, Fe2o3゜Co-Fe
208. Magnetic recording media (metal powder magnetic recording media, abbreviated as M
P magnetic recording media), magnetic recording media whose magnetic layer is a magnetic thin film made of metals or alloys mainly composed of Co, Ni, Fe, etc. (metal thin film magnetic recording media, abbreviated as M
EM recording media) are being put into practical use.

With the advancement of the above-mentioned MP and ME magnetic recording media (these magnetic recording media are simply referred to as metal-based magnetic recording media),
The magnetic saturation and magnetic permeability of the magnetic core material in the high frequency range have become a problem, and from this point of view, magnetic materials with multilayered metal magnetic thin films such as Sendust alloy and amorphous alloy have been developed as a solution for high-density recording media. ``'v Nod has been put into practical use.

FIGS. 8, 9, and 10 show examples of magnetism used in these metal-based magnetic recording media. FIG. 8 is a plan view of the magnetic head (the medium runs within the plane of the paper), FIG. 9 is a front view of the magnetic core of the magnetic head seen from the side of the metal magnetic recording medium, and FIG. 10 is a perspective view. It is.

41a is a metal-based magnetic recording medium, 41b is a metal-based magnetic recording medium 41. 41c indicates the direction of rotation of the magnetic head.

Reference numeral 41 denotes a soft magnetic metal magnetic thin film section formed into multiple layers via an interlayer insulating layer (not shown), 42 a substrate sandwiching the metal magnetic thin film section 41, 43 a gap, and 44 a winding groove. , 45 are magnetic head core halves 41d and 41e.
This is glass for gluing.

Problems to be Solved by the Invention However, the magnetic head having the above structure is mounted in a magnetic recording device, and a metal-based magnetic recording medium is stored in the magnetic recording device at low l! If the vehicle is run under such environmental conditions, the following problems will occur. A burn-in phenomenon occurs on the magnetic thin film portion 41 of the magnetic core constituting the sliding portion within the sliding portion of the magnetic head that contacts the metal-based magnetic recording medium, resulting in a significant decrease in the output of the magnetic head.

This has the drawback of impairing the reliability of magnetic recording and reproduction on metal-based magnetic recording media.

Means for Solving the Problems It is an object of the present invention to provide a magnetic head which eliminates the drawbacks of the prior art and enables highly reliable recording and reproduction of metal-based magnetic recording media.

In order to achieve the above object, the magnetic head of the present invention has a porous oxide material containing a solid lubricant disposed in a part of the sliding part of the magnetic head that comes into contact with a metal-based magnetic recording medium. configured. Further, as a method for manufacturing the magnetic head of the present invention, there is a step of providing a notch in a part of the tape sliding part of the magnetic throat core in the stacking direction, and a step of providing a notch in a part of the tape sliding part of the magnetic throat core in the stacking direction, and a non-magnetic material containing a solid lubricant in the notch. and polishing the front surface including the porous oxide material and the core into a desired shape.

A porous oxide material containing a solid lubricant is placed on the sliding part of the magnetic head that comes into contact with the metallic magnetic recording medium, making it possible to run a metallic magnetic tape in a low-humidity environment. too,
Since the solid lubricant in the porous oxide material is intermittently supplied into the sliding part, the multilayered magnetic thin film and the metallic magnetic recording medium in the sliding part can run smoothly. The burn-in phenomenon that has conventionally occurred on magnetic thin films with a multilayer structure can be significantly improved, and the large drop in magnetic head output can be reduced.

Embodiment An embodiment of the present invention will be explained based on FIGS. 1, 2, and 3. FIG. 1 is a plan view of the magnetic head of the present invention viewed from the side in sliding contact with a magnetic recording medium, FIG. 2 is a front view of the magnetic core of the magnetic head viewed from the side of the magnetic recording medium, and FIG. FIG.

la indicates the running direction of the metallic magnetic recording medium, 1b indicates the running direction of the metallic magnetic recording medium 1a, and IC indicates the rotating direction of the magnetic head. 1 is a soft magnetic metal magnetic thin film part laminated in multiple layers via a glabella insulating layer (not shown), 2 is a substrate sandwiching the metal magnetic thin film part 1, 3 is a magnetic gap,
4 is a winding groove, and 5 is a glass for bonding the magnetic head core halves 1d and Ie.

A porous oxide material 6 containing a solid lubricant is deposited in a notch 6a provided in a portion of the sliding portion.

The soft magnetic metal magnetic thin film 1 is Fe-Aj! -34 series alloy (
Sendust), Co-Nb-Zr amorphous alloy, etc. S r 02 for the glabella insulating layer
A thin film is preferable.

The substrate 2 is made of Ni-Zn ferrite, crystalline glass, ceramics, or the like.

An example of configuring the porous oxide material 6 containing a solid lubricant will be described with reference to FIGS. 4, 5, 6, and 7.

The metal magnetic thin film 1 is sandwiched between the substrates 2 from both sides. The 7-dore core halves 1d and 1e are stacked on the gear knob surface 3 and glued together from the winding groove 4 with the glass 5. A stepped portion 6a is provided. The stepped portion 6a can be easily formed by precision cutting using a diamond grindstone or the like. Furthermore, as shown in Fig. 6, a solid lubricant and an oxide material are simultaneously sprayed or sputtered onto the stepped portion 6a to specify the lamination conditions such as the temperature of the adhered part, the type of gas in the atmosphere, the pressure, and the applied voltage. A porous oxide material containing a solid lubricant is then deposited.

Thereafter, the head shown in FIG. 7 is obtained by polishing to the position shown by the dashed line in FIG.

As a solid lubricant, MoS2. Graphite, PbO.

Inorganic compounds such as Na2Mob, WB-AgNi, Mo
A mixture of -MoS2, Ag-PTFEWSe2, etc. is desirable.

As the oxide material, N1O-ZnO system, Zn0Fe203
Oxides such as Al2O2, ZrO2, etc. are preferable.

A more specific example will be described.

Embodiment 1 The magnetic head is basically composed of the magnetic heads shown in FIGS. 1, 2, and 3. The substrate 2 in FIG.
An i-Z n-based ferrite was selected, and a Co-N b -Z r-based amorphous alloy sputtered film was laminated as the soft magnetic thin film 1 with a thickness of 3 μm per layer, and a 5102 film as an interlayer insulating layer of 0.2 μm. It has a multilayer structure of 7. A porous alumina material containing MoS 2 solid lubricant was arranged in a part of the sliding part.

The prototype magnetic head was then loaded into the cylinder of a prototype deck roughly equivalent to a commercially available 8 mm video deck, with the head protruding amount 35 μm.

The temperature of the above prototype deck was 25°C, and the relative humidity was 1.
A metal thin film type magnetic tape having a tape length of 2 hours was run for 200 buses in a 0% environment, and the head output and the surface of the magnetic head at that time, especially the surface of the soft magnetic thin film, were observed. The results are shown in Table 1.

Table 1 In Table 1, ◎ indicates a good condition, and × indicates a significant decrease in head output and head damage due to burn-in. Comparative Example 1 in Table 1 shows the results of a test similar to Example 1 using a conventional magnetic head.

Effects of the Invention According to the magnetic field of the present invention, a porous oxide material containing a solid lubricant is disposed in addition to the multilayered magnetic thin film part on the sliding part of the magnetic head that comes into contact with a metal-based magnetic recording medium. Therefore, even when a metallic magnetic tape is run in a low-humidity environment, the solid lubricant in the porous oxide material can be intermittently supplied into the sliding part. The magnetic thin film and metal magnetic recording medium can run smoothly, the burn-in phenomenon that conventionally occurs on multilayered magnetic thin films can be greatly improved, and the large drop in magnetic flux output can be reduced. Therefore, the present invention enables highly reliable recording and reproduction of metal-based magnetic recording media, and has great practical effects.

[Brief explanation of drawings]

FIG. 1 is a plan view of a magnetic head according to a first embodiment of the present invention, FIG. 2 is a front view of the same magnetic head, FIG. 3 is a perspective view of the same magnetic head, and FIGS. FIG. 8 is a plan view of a magnetic head used as a conventional example, FIG. 9 is a front view of the same magnetic head, and FIG. FIG. 3 is a perspective view of the same magnetic head. 1...Soft magnetic gold rIX magnetic thin film part, 1a...
...Magnetic recording medium, 1b... Running direction of magnetic recording medium, IC... Rotating direction of magnetic head,
ld, Ie...Magnetic core half-off, 2...
Substrate, 3...Gap, 4...Winding groove, 5...Glass, 6...Porous oxide material containing solid lubricant, 6a...Notch, 7.
...Head shape and dimensional position, 4 parts...Soft magnetic gold m magnetic thin film part, 41a...Magnetic recording medium, 41. b...The running direction of the magnetic recording medium,
Rotation direction of 41 (+...magnetic y), 41d,
41e...Magnetic core half, 42...Substrate, 43...Gap, 44...Winding groove, 45...Glass. Name of agent: Patent attorney Akira Okaji and two other senior retainers C! !杹C Hyōshibara eo So- Regret figure figure figure figure figure figure figure 10 figure

Claims (2)

[Claims] (1) In a magnetic head in which a soft magnetic thin film is sandwiched between substrates,
A magnetic head characterized in that a porous oxide material containing a solid lubricant is arranged in a part of the magnetic head sliding part that comes into contact with a metal magnetic recording medium. (2) Regarding a magnetic head with a soft magnetic thin film sandwiched between substrates,
a step of providing a notch in a part of the tape sliding portion of the magnetic head core in the stacking direction; a step of applying a non-magnetic porous oxide material containing a solid lubricant to the notch; 1. A method for manufacturing a magnetic head, comprising the step of polishing a front surface including a magnetic oxide material and a head core into a required shape.