JPS58141428A - Vertically magnetizing recording head - Google Patents

Abstract

PURPOSE:To improve the wear resistance, by providing a lubricative high-hardness region on the surface of a main magnetic pole or an auxiliary magnetic pole, which is brought into contact with a magnetic medium, in a vertically magnetizing recording head. CONSTITUTION:A lubricative high-hardness region B is provided in a part or the whole of a main body part A consisting of a high-hardness ceramic or the like, and its surface part is worked to a plane specular face with high precision, and magnetic materials such as ''Permalloy '' are formed as a magnetizing recording thin film magnetic pole 3 by sputtering or the like, and a similarly formed holding material is assembled and is allowd to adhere to it. The surface to be bought into contact with the recording medium is subjected to the high-precision specular face work to prescribed dimensions and shape. A normal ceramic part 1 and a solid-state lubricative part 2 buried in its particles exist alternately in the lubricative high-hardness region B, and this region B has high lubricativity and wear resistance. Graphite materials are used as materials of the main body part A, and the surface of graphite materials are sintered to a high temperature and is converted to an SiC to improve the hardness and the hardness and the strength, and the graphite simple substance is deposited and left to generate the lubricative high-hardness region B.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a perpendicular magnetization recording head, and the present invention relates to a perpendicular magnetization recording head, in which the parts that come into contact with a magnetic recording medium, that is, the holding part of the main pole head that holds the magnetic thin film magnetic poles together and the auxiliary pole head, are made of high hardness originally made of ceramic. Perpendicular magnetic recording has good wear resistance, less damage to the magnetic recording medium it comes into contact with, and stable magnetic recording and reproduction by providing a lubricating high hardness region that maintains the same properties and improves lubricity. The purpose is to provide heads for

Until No. 1, ordinary ceramics such as alumina or glass were used for the holding part of the magnetic thin film magnetic pole of the main magnetic pole head, and the recording medium that came into contact with it was also a so-called knot type, which was a polymer film coated with magnetic powder. However, in perpendicular magnetization recording, according to the purpose of high-density recording,
A hard magnetic recording medium made of a metal magnetic material such as Cr-Co by sputtering or the like is used. Therefore, the load on the head increases, and with conventional materials such as alumina and glass, the amount of wear is large and it is difficult to stabilize the characteristic output, and the increased friction can damage the magnetic recording medium and deteriorate the magnetic properties. This caused major problems in reliability, such as longevity. Furthermore, if a material with extremely high hardness, such as sapphire, is used due to loss of wear resistance, there are disadvantages such as high material cost, difficulty in processing, and extremely high cost.

The present invention solves the above-mentioned conventional drawbacks, and the present invention maintains the original hardness of ceramics and also provides good solid lubricity in @lubricious high hardness regions at least on the surface or all of the magnetic head in contact with the magnetic recording medium. By creating this head, we provide a perpendicular magnetization recording head with good wear resistance, low friction, and no damage to the magnetic recording medium, making it possible to perform highly reliable, stable, high-performance, high-density perpendicular magnetization recording. This is what I did.

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1a and 1b show a main pole head according to a first embodiment of the present invention. Depending on the required recording wavelength or mechanism, the cross-sectional surface shape may be spherical as shown in Figure 1 (ta), or a flat surface with high-precision mirror finishing as shown in Figure 1(b). A lubricating high hardness region B is provided in part or all of the main body A made of ceramic or the like, and the surface thereof is subjected to a plane mirror rotation I4 process with high precision, and a magnetic material such as Pernloy is sputtered as a magnetic thin film magnetic pole 3 for magnetization recording. 7, and by assembling and gluing holding materials prepared in the same manner.Then, the surface that contacts the recording medium is subjected to high-precision mirror finishing to a predetermined size and shape1.
．． In the lubricating high hardness region B of the present invention, normal ceramic portions 1 and solid lubricating metals 2 embedded in their grain boundaries alternately exist, and have good lubricity and wear resistance.

There are the following combinations of methods for creating such a lubricating high hardness region B and high hardness ceramics.

(1) Graphite material is used as the main body A, and the surface of the graphite material is fired at high temperature and converted to SiC to increase hardness and strength, and the lubricating high hardness region B is created by °Ji, which causes graphite alone to precipitate and remain. create. At this time, ceramic part 1
is SiC, and the residual precipitated graphite crystals are solid lubricant 2.
It acts as.

(2) Alumina (A1203), A4203-Ti
C, TiO2゜phono C stellite non-magnetic ferrite,
A high hardness ceramic of either A1203-Fe203-Tic or 5iC-8t is used as the main body part A, and solid lubricant 2 such as molybdenum disulfide or fluororesin is infiltrated into the pore grain boundaries on the surface and fired. Lubricant high hardness area B
Create.

FIG. 2 shows a sectional view of an embodiment in which the present invention is applied to an auxiliary magnetic pole head. a indicates the case where the surface shape is spherical, and b indicates the case where the surface shape is flat. A ceramic having a lubricating high hardness region B on at least the surface portion, which is prepared by a method similar to that shown in FIG. 1, is bonded to the surface of a magnetic core C for an auxiliary magnetic pole. Further, a magnetic flux readout coil is wound around it with a predetermined number of nine turns.

FIG. 3 shows an enlarged microscopic view of the lubricating high hardness region B explained in FIG. 1.

What appears white in the figure is a portion where graphite has been converted to SiC, and the black portion is a residual precipitated graphite portion.

In the figure, SiC and graphite parts are alternately distributed, and this distributed state provides good lubricity and wear resistance.
ni-)゛ru. Also, those in which the distribution ratio of graphite is about 10 to 30% are excellent in terms of characteristics.

FIG. 4 shows a second embodiment of the invention. The figure shows the case of the main magnetic pole. A shows the case where the surface shape is flat, and b shows the case where the surface shape is spherical.

Concave, triangular, or round shaped droplets were created on the surface of the holding material main body A made of high hardness ceramic that holds the magnetic thin film magnetic pole 3 by applying equipment such as dicing 1 or by other methods, and the Example was applied to the grooves. The solid lubricant 2 described in 1 is fixed by coating adhesion or other methods, and then processed into a predetermined spherical or flat shape. In this embodiment as well, the surface that comes into contact with the medium is made of ceramic that maintains high hardness and a solid lubricating part! Since t' and K exist, the same effect as in Example 1 is obtained.

A similar implementation is also possible for the A1 auxiliary magnetic pole head.

In other words, it is the ceramic part that holds the magnetic thin film pole and has a large contact area with the medium that does not affect the abrasion of the nine heads that come into contact with the magnetic recording medium and cause scratches.
By creating a lubricating high-hardness region with high hardness and improved lubrication performance on the surface ceramic part of the main magnetic pole head and auxiliary magnetic pole head for perpendicular magnetization recording, it becomes a perpendicular magnetization head with good wear resistance and can be used with media. The present invention provides a lubricating high-hardness region on the surface of the main pole or auxiliary pole that contacts the magnetic medium in a perpendicular magnetization recording head. By providing this, it is possible to improve wear resistance.

[Brief explanation of the drawing]

Figures 1a and 2b are cross-sectional views showing essential parts of a perpendicular magnetization recording head according to an embodiment of the present invention;
Figures 4 and 5 are cross-sectional views of perpendicular magnetization recording heads in other embodiments of the present invention. 'A...High hardness ceramic, B...
Lubricating high hardness; W region, C... Auxiliary pole core, 1
... Ceramic, 2 ... Solid lubricant,
3...Main magnetic pole thin film magnetic pole, 4...5iC
16...C (remaining part) Name of agent Patent attorney Toshi Nakao and one other person 15 1/All! 1l (a) Ib3 12m 1311 114ffil

Claims (8)

[Claims] (1) A perpendicular magnetization recording head configured to perform magnetization recording in a direction perpendicular to a magnetic medium, characterized in that a lubricating high hardness region is provided on a surface portion of a magnetic pole head that contacts the magnetic medium. (2) The perpendicular magnetization recording head according to claim 1, wherein the lubricating high hardness region is provided on the surface of the holding portion of the thin film magnetic pole of the main magnetic pole head. (3) A magnetic medium is held between a main magnetic pole head and an auxiliary magnetic pole head, and a lubricating high hardness region is provided on at least one of the surface of the holding portion of the thin film magnetic pole of the main magnetic pole head and the surface of the auxiliary magnetic pole head. 2. A perpendicular magnetization recording head according to claim 1, characterized in that: (4)? 1Afv4 high hardness region is composed of silicon carbide obtained by converting a part of a graphite substrate and residual precipitated graphite alone, according to any one of claims 1 to 3. Perpendicular magnetization recording head. (5) @Lubricating high hardness region according to any one of claims 1 to 3, characterized in that a solid lubricant is embedded in pores of high hardness ceramic. Perpendicular magnetization recording head. (6) High hardness ceramic is Al 20 a r A
l 203-T z Cr T iO2, forsterite, non-magnetic ferrite* A I OF e 20
Claim 5 characterized in that it is any one of 3 T iCt SI CS i
The perpendicular magnetization recording head described in Section 1. (7) Any one of claims 1 to 3, characterized in that the lubricating high hardness region is a solid lubricant embedded in a recess provided on the surface of high hardness ceramic. The perpendicular magnetization recording head described in . (8) High hardness ceramic strength, A12o3. A1203-
T iC, T 102 +7 orsterite, non-magnetic ferrite* A l 203-J e 20s T
8. The perpendicular magnetization recording head according to claim 7, wherein the perpendicular magnetization recording head is one of IC and SIC-8l.