JP2759456B2 - Magnetic media recording device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention is used for a recording device for information processing.

The present invention relates to a magnetic medium device having a recording medium sliding part for recording and / or reproducing information. In particular, the present invention relates to a magnetic medium recording apparatus having a component that constantly or temporarily comes into sliding contact with a recording medium such as a tape, a disk, or a sheet.

〔Overview〕

The present invention relates to a magnetic medium recording apparatus provided with a magnetic head and a means for moving a magnetic recording medium with respect to the magnetic head, comprising a glassy carbon, a metal oxide, a metal nitride, a metal carbide and a metal boride fine particle. By using a sliding part that slides on a magnetic recording medium composed of a composite material containing one or more inorganic compounds, the operation of the device is stabilized, the durability is improved, and the magnetic head and the magnetic recording medium are Are kept narrow and stable.

[Conventional technology]

At present, various magnetic media devices for recording and / or reproducing using a flexible disk, a hard disk or a magnetic tape having a magnetic layer coated on the surface or a magnetic layer formed as a thin film are commercially available, and further development is underway. Is underway.

These recording / reproducing apparatuses use a large number of components that are in constant or temporary sliding contact with the recording medium. Examples of such parts include a flexible disk head and a head slider stabilizing plate, a jacket liner, a magnetic tape head, a head slider, a guide pin, a guide roller, a cylinder, a friction sheet in a cassette, and a hard disk. Floating head slider. It is necessary that these sliding parts have excellent durability and do not damage the recording medium which relatively slides.

In particular, since it is necessary to maintain a delicate gap (spacing) by sliding contact during recording and reproduction, sufficient attention has been paid to the manufacture of the magnetic head and the slider, and the material and shape thereof have been carefully selected. Conventionally, the material of this head slider has been calcium titanate, barium titanate,
Hard glass, alumina ceramics, carbon ceramics and the like have been developed.

On the other hand, the recording density of flexible magnetic disks has been increasing year by year due to the recent demand for higher density, and the size of flexible magnetic disks has been further reduced. The magnetic layer is made into a continuous metal thin film medium to increase the size and capacity, and the disk rotation speed is increased from 300 rpm to 4000.
Servo systems found in hard magnetic disk drives have been introduced to increase the rpm or to increase the tracking accuracy. Further, the thickness of the magnetic layer tends to be reduced.

Also, digital recording and higher-density recording have been performed on magnetic tapes, and problems relating to running deviation and sliding have become more serious.

[Problems to be solved by the invention]

With flexible magnetic disks, such high density,
As a problem corresponding to the increase in speed, stabilization of the spacing (gap) between the magnetic head and the medium has been required, and contrivance on the apparatus has been required. In order to cope with this, the method of pressing the media from the back side has been adopted, but this method does not have sufficient abrasion resistant material for systems using new metal media etc. There wasn't enough to prevent it.

Magnetic tapes have excellent sliding properties with tape media, and have caused problems in materials such as guide slippage and deviation of the running of the tape, which guarantees stable running of the tape.

Further, there is a strict demand for winding and running the tape in the cassette, and there is a demand for a material that does not damage the medium and that does not damage the medium itself.

Hard disk devices are required to have a stricter head / medium touch system for not only lowering the flying height of the flying head in high density but also for miniaturizing the system and supporting high density.

An object of the present invention is to solve these problems and to provide a system that is more stable and more durable in operation of a magnetic tape or a magnetic disk drive.

[Means for solving the problem]

The present invention provides a magnetic medium recording apparatus including a magnetic head and a unit for moving a magnetic recording medium with respect to the magnetic head, including a sliding contact part that slides on the moving magnetic recording medium, and a part of the sliding contact part. A composite in which at least the sliding contact surface of all the sliding contact parts contains glassy carbon and at least one inorganic compound selected from metal oxide fine particles, metal nitride fine particles, metal carbide fine particles, and metal boride fine particles. It is characterized by being composed of a material.

The magnetic medium can be any of a magnetic disk, a magnetic tape, and a magnetic sheet.

Further, in a magnetic medium recording apparatus provided with means for rotating a flexible magnetic disk and a magnetic head close to the surface of the magnetic disk, the magnetic medium is a magnetic disk, and a portion of the magnetic disk where the magnetic head is close to the magnetic disk. A sliding contact part in contact with the back surface of the sliding contact part, at least the contact part of which is a kind selected from glassy carbon, metal oxide fine particles, metal nitride fine particles, metal carbide fine particles, and metal boride fine particles. It is a structure formed of a composite material containing the above inorganic compound.

[Action]

The glassy carbon material according to the present invention is a glassy carbon material obtained by carbonizing a thermosetting resin, or a glassy carbon material obtained by carbonizing a resin modified to be thermoset by copolymerization or cocondensation. Material, glassy carbon material obtained by significantly preventing crystallization by chemical treatment in the process of hardening or carbonization, glassy material obtained by pyrolyzing low molecular weight hydrocarbons such as methane, ethylene, benzene, etc. in the gas phase Carbon material, specifically, polyacrylonitrile-based glassy carbon material, rayon-based glassy carbon material, pitch-based glassy carbon material, lignin-based glassy carbon material, phenol-based glassy carbon material, furan-based glass Carbon material, alkyd resin glassy carbon material, unsaturated polyester glass Carbon materials, xylene resin glassy carbon material, and the like. The above-mentioned glassy carbon material is a material having a moderate lubricating property in which the carbon material itself wears first before the surface film of the recording medium is damaged when the recording medium slides, and is amorphous. It is a glassy carbon material in a state.

However, in a system of higher density recording, a glassy carbon material alone may cause a problem due to its lubricity, and as a result of intensive studies, the present invention was reached.

That is, the present invention provides an apparatus provided with a sliding contact part having extremely excellent sliding characteristics with respect to a medium, and uses a composite material of glassy carbon and an inorganic compound as the sliding contact part. The composite material of the glassy carbon and the inorganic compound as referred to in the present invention has further improved lubrication. The composite material is, for example, a composite material of an inorganic compound selected from metal oxide fine particles, metal nitride fine particles, metal carbide fine particles, and metal boride fine particles and glassy carbon. Particularly, alumina, zirconia silicon oxide, titanium oxide, silicon carbide, titanium carbide, silicon nitride, zirconium boride and the like in the inorganic compound are desirable.

In addition, these are a method of dispersing and mixing an inorganic compound during a glassy carbon production process, impregnating glassy carbon or a glassy carbon precursor during sintering of an inorganic compound,
It can be obtained by mixing. In particular, in this case, a method using an impregnation method is desirable. Alternatively, the composite material may be formed into a thin film only on the sliding contact surface by a physical thin film forming method.

Further, the magnetic medium device having a contact component that is in temporary or constant contact with the recording medium and relatively slides with the recording medium according to the present invention is a device that reproduces and / or records on magnetic recording such as a disk drive and a tape drive, and Includes those related to peripheral systems including the case for storing magnetic recording media. In the magnetic disk drive, the provided sliding contact parts are a head and a head slider, and refer to recording / reproducing elements such as a bulk head and a thin film head and a support thereof, and may have any shape such as a spherical surface.

The stabilizing plate is also called a stabilizer, a pad, or a regulating plate, and mainly provides a relatively stable spacing between the medium and the head. In a magnetic tape device that is a liner in a jacket, similar heads and head sliders, a cylinder that supports the head, guide pins and guide rollers that regulate the running of the tape, and winding and running characteristics of the tape in the tape cassette Such as friction sheets and guide pins.
It also refers to a floating head and a head slider of a hard disk. Further, it refers to a part that may slide directly or constantly with a magnetic recording medium, such as a part where a multitrack head substrate directly contacts a medium, and a part that contacts the part.

By using a component made of such a material in a contact portion that is in sliding contact with a magnetic medium, the sliding characteristics with the medium are improved, and the frictional resistance is low and stable recording / reproducing characteristics are provided for a long time without damaging the medium. be able to.

〔Example〕

Next, a magnetic medium recording apparatus according to an embodiment of the present invention will be described.

(Example 1) 0.05 parts by weight of magnesium carbonate, 0.2 parts by weight of sodium polyacrylate, and 30 parts by weight of water were added to 100 parts by weight of alumina having an average particle diameter of 0.3 μm as a sintering aid, and a slurry was prepared. Cast into a shape of × 10mm, dried, 1300 ℃
× 1 hour pre-firing in air, shrinkage 7.8%
And the porosity was 33%.

To the pre-fired body, Zansumiritsu 40%, 60 ° C. ash 0.3% phenolic resin, heating, impregnated under vacuum, after the curing treatment at 90 ° C., in N ₂ atmosphere at 1700 ° C. 4 Fired for hours.

The bulk density of the obtained sintered body is 3.57 g / cc and carbon is 4.8%
Had been compounded.

(Example 2) Furfuryl alcohol (manufactured by Kao Quaker Co., Ltd.) 100
5 parts of a 0.011N-HCl aqueous solution was added to the mixture, and the mixture was reacted at 96 ° C. for 6 hours, followed by dehydration under reduced pressure to obtain a thermosetting resin. To this thermosetting resin, 2% by weight of ultrafine alumina particles having an average primary particle size of about 20 nm (aluminum oxide C manufactured by Nippon Aerogel Co., Ltd.) was added and mixed by a ball mill. Obtained furfuryl alcohol initial condensate resin 100
To this part, 1.5 parts of a 70% aqueous solution of p-toluenesulfonic acid was added, followed by sufficient stirring. This was poured into a strip-shaped mold having a thickness of 3 mm and defoamed under reduced pressure. Next, it heated at 50-60 degreeC for 3 hours, and also 90 degreeC for 5 days. The resulting strip-shaped composite cured resin is placed in a tube furnace and placed in a nitrogen stream.
The temperature was raised to 1200 ° C at a rate of 10 ° C / hr,
After holding for a time, it was cooled. The alumina content in the composite was 4.1%.

(Test Example 1) The composite materials of Examples 1 and 2 were cut out in the shape of a double-barreled floating head slider for a hard disk. The width of both ski portions was 0.420 mm and the length of the ski portion was 4.070 mm. The rear end of the ski part is 0.340mm long and 0.5mm tapered. The width of the entire head was 3.17 mm and the height was 0.87 mm. These were fixed to a gimbal spring and mounted on a commercially available test machine. CS-based Co-Ni hard disk media with a carbon protective film
The S test (Contact Start and Stop Test: a form of test that contacts at start and stop, and lifts by wind pressure during rotation) was performed.

The surfaces of the disk and the head after 20,000 times of CSS were visually observed and observed with a microscope. In the systems using the materials of Examples 1 and 2, the head and the disk sliding contact surface were not damaged. As a comparative example, the same shape of ALTIC (alumina, TiC composite ceramics) was similarly tested.

Example 3 0.2 parts by weight of polyvinyl alcohol was added to 100 parts by weight of yttria partially stabilized zirconia powder having an average particle size of 0.1 μm,
0.1 parts by weight of stearic acid and 100 parts by weight of water were added and mixed to obtain a spray-dried powder. 1000 kg of this powder
It was molded into a 30 × 60 × 7 mm flat plate at a pressure of / cm ² . This compact was pre-fired in air at 1100 ° C. for 1 hour. The obtained prefired body had a shrinkage of 2.1% and a porosity of 56%.

The prefired body was impregnated with a furan resin having a residual carbon ratio of 30% and an ash content of 0.02% at room temperature under vacuum, subjected to a hardening treatment at 80 ° C, and then fired at 1400 ° C in vacuum for 4 hours.

The bulk density of the obtained sintered body is 4.5 g / cc, and carbon is 11.2%.
Had been compounded.

(Test Example 2) The materials of Examples 2 and 3 were processed into the appearance of a commercially available 3.5 ″ floppy disk head. The dummy head was mounted on a gimbal spring, and then mounted on a 3.5 ″ drive.

Each was rotated and slid 5 million times at 300 rpm on the same track. The floppy disk used was a Co-γFe ₂ O ₃ coated disk, but none of the materials of Examples 2 and 3 was damaged.

As a comparative example, a similar test was performed on calcium titanate processed into the same shape, and a slight running trace was visually confirmed.

Example 4 500 parts of furfuryl alcohol and 420 parts of 92% paraformaldehyde were stirred and dissolved at 80 ° C., and phenol 5 was stirred under stirring.
A liquid mixture of 20 parts, 8.8 parts of sodium hydroxide and 45 parts of water was added dropwise. After the completion of the dropwise addition, the mixture was reacted at 80 ° C. for 3 hours. Thereafter, a mixed solution of 80 parts of phenol, 8.8 parts of sodium hydroxide, and 45 parts of water was further added dropwise and reacted at 80 ° C. for 3.5 hours. 30 ℃
After cooling, neutralized with 70% paratoluenesulfonic acid, and then dehydrated the neutralized product under reduced pressure to remove 150 parts of water.
00 parts of furfuryl alcohol were added. The resin obtained had a viscosity of 150 cps at 25 ° C. and a water content of 7%. To 100 parts of this resin, ₂ parts of Al ₂ O ₃ ultrafine particles (manufactured by Nippon Aerogel Co., Ltd.) having a particle size of 0.01 μm were added and milled until uniform. To 100 parts of this Al ₂ O ₃ composite resin was added 3.5 parts of a solution prepared from 70 parts of paratoluenesulfonic acid, 20 parts of water, and 10 parts of glycol, and after sufficient stirring, degassed under reduced pressure and poured into a mold having a thickness of 3 mm. did. Next, at 50-60 ° C for 3 hours, then at 80 ° C for 2 hours.
Heated for days. The resulting cured resin was placed in a tubular furnace, heated to 1200 ° C. at a rate of 10 ° C./hr in a nitrogen stream, kept for 2 hours, and cooled to obtain a glassy carbon composite material.

(Test Example 3) The material prepared in Examples 3 and 4 was cut out into a square bar of 2 mm x 2 mm x 20 mm, and a 2 mm x 2 mm surface was subjected to spherical processing (R20 mm) using a precision lathe and a spherical polishing machine. This is 3mm long
Cut into pieces. 2 "metal coated media (manufactured by Sony Corporation)
On the other hand, the head portion of the 2 ″ flexible magnetic disk drive was replaced with the above-mentioned material, the head protrusion amount was 60 μm, and the peripheral speed was 7.
The media was rotated at 5 m / sec. After 10 million passes, there was no visible damage to the flexible magnetic disk.

(Example 5) The composite material obtained in Example 4 was processed into a disk shape having a thickness of 2 mm, metal-bonded to a packing plate for sputtering oxygen-free copper, and attached to the cathode of the apparatus to serve as a target. On the counter electrode, NiZn ferrite as a material to be coated was processed into the shape of Test Example 3 and fixed on an electrode plate.
After pre-sputtering this counter electrode under cold water,
After forming an alumina thin film by sputtering, a carbon composite thin film was formed to a thickness of 400 mm. Using NICHIDEN manufactured by ANELVA SPF430H as a sputtering apparatus, introduced after the vacuum of 10 ^-7 Torr as the background pressure as with ordinary sputtering, the argon gas to 5 × 10 ^-3 Torr as a discharge gas 40
High frequency power of 0 W was applied to perform high frequency sputtering. The dummy spherical head on which the obtained composite material thin film was formed was tested in the same manner as in Test Example 3. Similarly, there was no visible damage to the flexible magnetic disk after 10 million passes.

Example 6 Zirconia powder (average particle size: 4 μm) and 1% by weight of a phenol resin as a glassy carbon precursor were mixed and cured, and then sintered at a temperature of 1400 ° C.

Example 7 0.2 parts of paratoluenesulfonic acid was mixed with 100 parts of furfuryl alcohol, and the mixture was stirred at a temperature of 90 ° C. and reacted to obtain an initial condensate (using a 650 cps B type viscometer at a viscosity of 20 ° C.). Was. After neutralization, ultrafine alumina particles (aluminum oxide C, manufactured by Nippon Aerogel Co., Ltd.)
ol%, and the mixture was sufficiently stirred with a sand mill, and a 30% aqueous solution of p-toluenesulfonic acid was added, followed by curing at 80 ° C. for 2 days. Cut the cured composite to a thickness of 3 mm and raise the temperature to 1600 ° C
C. and heat-treated in a high-temperature Ar atmosphere. The alumina content in the composite material was 8.3% by weight.

Example 8 500 parts of furfuryl alcohol and 420 parts of 92% paraformaldehyde were stirred and dissolved at 80 ° C., and phenol 5 was stirred under stirring.
A liquid mixture of 20 parts, 8.8 parts of sodium hydroxide and 45 parts of water was added dropwise. After the completion of the dropwise addition, the mixture was reacted at 80 ° C. for 3 hours. Thereafter, a mixed liquid of 80 parts of phenol, 8.8 parts of sodium hydroxide, and 45 parts of water was further added dropwise and reacted at 80 ° C. for 7.5 hours. 30 ℃
After cooling, neutralized with 70% paratoluenesulfonic acid, and then dehydrated the neutralized product under reduced pressure to remove 200 parts of water.
00 parts of furfuryl alcohol were added. The resin obtained had a viscosity of 1500 cps at 25 ° C. and a water content of 7%. To 100 parts of this resin, 5 parts of SiC powder having a particle size of 0.06 μm (manufactured by Shimizu Chemical Co., Ltd.) and 2 parts of polyethylene glycol were added and milled until uniform. This SiC composite resin 100
3.5 parts of a solution prepared from 70 parts of paratoluenesulfonic acid, 20 parts of water and 10 parts of glycol were added to the parts, and after sufficient stirring, defoamed under reduced pressure and poured into a mold having a thickness of 3 mm. Then, 50-60
C. for 3 hours and at 80.degree. C. for 2 days. The resulting cured resin was placed in a tubular furnace, heated to 1400 ° C. in a nitrogen stream at a rate of 10 ° C./hr, kept for 2 hours, and cooled to obtain a glassy carbon composite material. The SiC content in the composite is 10.5
%Met.

(Test Example 5) The materials of Examples 6, 7, and 8 were cut out into the shapes shown in FIG. On the pad 1 of the flexible magnetic disk drive having the sliding contact parts mounted as shown in FIG.
Inch metal coated video floppy (Sony Corporation)
2 was set and a durability test was performed. The peripheral speed was 7.54 mm (disk rotation speed 3600 rpm, head position R20 mm), and the protrusion amount of the magnetic head 3 was 60 μm. In addition, as a magnetic head, 2
The one for inch video floppy was used. As a result, a stable output characteristic was obtained without any damage to the flexible magnetic disk visually after 10 million passes. Microscopic observation confirmed that there was substantially no wear on the sliding portion of the composite material, and the running stability was also very good.

In FIG. 1, the shape of the indentation is exaggerated from the actual shape for easy understanding of the description.

Example 9 In the same manner as in Example 5, a 400 ° composite thin film was formed on the aluminum compact having the shape shown in FIG. This was mounted on a 2 ″ flexible magnetic disk drive and tested 10 million times in the same manner as in Test Example 5. Stable output characteristics were obtained without damage to the disk. confirmed.

(Test Example 6) A thin plate of a composite material having a thickness of 0.5 mm was formed in the same manner as in Example 8, and the surface was polished abrasive grains (alumina) of final $ 10,000.
And finished to a mirror surface. In order to measure the coefficient of friction of this material against the raw magnetic tape, a magnetic tape was fixed on a flat surface plate with an adhesive tape, the material was fixed on a jig, brought into surface contact with the surface of the magnetic tape, and pulled with a tensilon. The relative speed with respect to the magnetic tape was set at 200 mm / min, and the friction coefficient was determined from the weight-to-tension ratio of the material.

Also, a molded body of the present material was inserted into the cassette tape and the inner wall of the cassette so as to be in sliding contact with the edge of the magnetic tape, an audio cassette was assembled, and the winding torque was measured. The friction coefficient was 0.10 to 0.13, which was 80% or less of a commercially available graphite filler solidified with a resin. The winding torque was 1.5 to 8.5 gcm at a value of about 70%. The characteristics of this material can be said to be applicable not only to the slide sheet in the cassette but also to the guide pins and cylinders of the magnetic tape device.

Next, a magnetic medium recording apparatus according to a second embodiment of the present invention will be described in detail with reference to the drawings. The following examples are merely examples, and do not limit the technical scope of the present invention.

FIG. 3 is a perspective view showing the shape of a sliding part of the magnetic medium recording apparatus according to the third embodiment of the present invention, and FIG. 2 is a structural view of the magnetic medium recording apparatus.

The magnetic medium recording apparatus according to the embodiment includes a spindle 22 for rotating a flexible magnetic disk 21, a head arm 23 provided in a unit (not shown) close to the surface of the magnetic disk 21, and fixed to the head arm 23. A head gimbal spring 25 having a magnetic head 24 close to the surface of the flexible magnetic disk 21; Here, the present invention is characterized in that the magnetic head 24 of the flexible magnetic disk 21 is provided with the sliding contact part 11 which comes into contact with a position on the back surface thereof.

Hereinafter, several embodiments of the sliding contact part 11 will be described. Each of these was formed into the shape shown in FIG. 3 and tested with the apparatus shown in FIG.

(Example 10) A glassy carbon (Gurahard R manufactured by Kao Corporation) was cut out, surface-roughened by rough polishing until a thickness of 2.1 mm was obtained, and R and C surfaces were chamfered as shown in FIG. 5.25 inch γ-
The output characteristics were measured to examine the durability of the magnetic disk coated with the Fe ₂ O ₃ magnetic powder and to determine the stable running between the magnetic disk and the magnetic head. That is, the information of the intermittent pulse pattern was recorded on one track of the magnetic disk 21, and then this information was repeatedly read and compared with the pulse pattern recorded. As a result, no error was detected even after rotating 140,000 times. Also, it was found from the torque measurement that it had stable lubrication for a long time.

(Example 11) 0.2 parts of paratoluenesulfonic acid was mixed with 100 parts of furfuryl alcohol, and the mixture was stirred at a temperature of 90 ° C and reacted to obtain an initial condensate (using a 650 cps B type viscometer at a viscosity of 20 ° C). Was. After neutralization, alumina ultra-fine particles (aluminum oxide C, manufactured by Nippon Aerogel Co., Ltd.)
ol%, and the mixture was sufficiently stirred with a sand mill, and a 30% aqueous solution of p-toluenesulfonic acid was added, followed by curing at 80 ° C. for 2 days. Cut the cured composite to a thickness of 3 mm and raise the temperature to 1600 ° C
C. and heat-treated in a high-temperature Ar atmosphere. This was cut into the shape shown in FIG.

(Example 12) Glass hard carbon fine particles having an average particle diameter of 20 µm were obtained by pulverizing Kao's Grahard R by a jet mill. This was compression-molded with a phenol resin (Novolak and Hexamine, manufactured by Sumitomo Bakelite) and cut into the shape shown in FIG.

Example 13 A mixture of zirconia powder (average particle size: 4 μm) and 1% by weight of a phenol resin as a glassy carbon precursor was sintered at a temperature of 1400 ° C. after mixing and curing. This was cut into the shape shown in FIG.

The sliding contact parts obtained in Examples 11 to 13 were also tested as shown in FIG. 4, and as a result, the same output stability and low torque could be realized. Similar stability was obtained when a high-speed rotation of 1500 rpm was performed using a metal continuous medium, for example, a CoCr disk.

〔The invention's effect〕

As described above, according to the present invention, the operation of the device can be further stabilized, and the durability can be improved. Further, the gap between the single-sided recording flexible magnetic medium and the magnetic head can be stably maintained, and when the magnetic head is supported by a spring, the contact pressure between the magnetic medium and the magnetic head is further stabilized. It does not damage the magnetic layer even for flexible magnetic media of double-sided recording,
Flexible magnetic media can be provided with a protective lubrication layer,
There is no need to apply a lubricant to the sliding parts. Further, there is an excellent effect that static electricity is not generated due to the conductivity of the material to be used, and dust does not easily adhere to a portion that comes into contact with the recording medium or the recording medium.

[Brief description of the drawings]

FIG. 1 is a diagram showing an example of a test in an embodiment of the present invention. FIG. 2 is a view showing an example of a test piece according to the embodiment of the present invention. FIG. 3 is a perspective view showing the shape of a sliding contact part of the magnetic disk drive of the embodiment of the present invention. FIG. 4 is a configuration diagram of a magnetic disk drive according to an embodiment of the present invention. 1 ... pad, 2, 24 ... flexible magnetic disk,
3, 23: magnetic head, 11: sliding parts, 21: head arm, 22: head gimbal spring, 25: spindle.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI F16N 15/00 F16N 15/00 G11B 5/10 G11B 5/10 A 5/187 5/187 F 15/60 15/60 B 15 / 61 15/61 A 17/04 301 17/04 301E 23/087 510 23/087 510C // (C10M 111/00 103: 02 103: 06) C10N 40:02 40:18 50:08 (56) Reference Document JP-A-59-195365 (JP, A) JP-A-62-42363 (JP, A) JP-A-62-6460 (JP, A) JP-A-62-202413 (JP, A) 33888 (JP, A) JP-A-62-42362 (JP, A) JP-A 62-15155 (JP, U) JP-A 60-40021 (JP, U) JP-A 60-173160 (JP, U) "Chemical Dictionary," 2, Kyoritsu Shuppan, published October 15, 1981 (58) Fields investigated (Int.Cl. ⁶ , DB name) G11B 17/34 G11B 5/60

Claims (3)

(57) [Claims] 1. A magnetic medium recording apparatus comprising: a magnetic head; and means for moving a magnetic recording medium with respect to the magnetic head, comprising: a sliding contact part for slidingly contacting the moving magnetic recording medium; Or at least the sliding contact surface of all the sliding contact parts contains glassy carbon and one or more inorganic compounds selected from metal oxide fine particles, metal nitride fine particles, metal carbide fine particles, and metal boride fine particles. A magnetic medium recording device comprising a composite material. 2. The magnetic medium includes a magnetic disk, a magnetic tape,
2. The magnetic medium recording device according to claim 1, wherein the recording device is any one of a magnetic sheet. 3. A magnetic medium recording apparatus comprising: means for rotating a flexible magnetic disk; and a magnetic head close to the surface of the magnetic disk, wherein the magnetic medium is a magnetic disk, and the magnetic head of the magnetic disk is A sliding contact part that comes into contact with the back surface of an adjacent part is provided. At least the contact part of the sliding contact part is made of glassy carbon, metal oxide fine particles, metal nitride fine particles, metal carbide fine particles, and metal boride fine particles. A magnetic medium recording device having a structure formed of a composite material containing at least one inorganic compound selected from the group consisting of: