JPS61267909A - Magnetic head - Google Patents

Abstract

PURPOSE:To reduce the friction coefficient between a magnetic head and a recording medium by providing a lubricating layer of thin film on the contact surface between the magnetic head and the recording medium. CONSTITUTION:A lubricating layer 7 of thin film obtained by sputtering carbon is formed on the contact surface with a recording medium formed by a core 1 consisting of ferrite, etc., and sliders 2 and 3. The friction coefficient between the magnetic head and the recording medium can be reduced by the layer 7 and the size and powder of a motor for rotating the recording medium can be reduced. Furthermore, the adhesion of the layer 7 can be improved by provid ing a chromium layer between the magnetic head and the layer 7.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to the structure of a magnetic head of a magnetic recording/reproducing device.

[Summary of the invention]

The present invention aims to reduce the coefficient of friction between the magnetic head and the recording medium, improve the contact state, and improve wear resistance by forming a lubricating layer on the contact surface of the magnetic head with the recording medium. .

[Prior art]

This will be explained by taking a magnetic head for a 7.7B disk drive device as an example. FIG. 3 is a perspective view of a magnetic head conventionally used and also used in the present invention. In the figure, 1 is a core, which is made of a magnetic material such as ferrite, sendust, or magnetic material. The core is provided with a coil 4 and a coil frame 5. Further, the core is sandwiched from the side by the first slider 2 and the second slider 3, and is strongly protected. Calcium titanate is usually used for the slider in consideration of its wear resistance. 2nd g
1 is a diagram showing a cross section of a conventional magnetic head. First slider 2. The second slider comes into sliding contact with the media 11 at the media contact surface 9 formed by the 5° core 1, and magnetic recording and reproduction are performed.

[Problems and Objectives to be Solved by the Invention] However, in the above-mentioned prior art, the contact state between the media contact surface formed by the slider and the core and the media has a friction coefficient of [1].
5 to IIL7, and the load torque applied to the motor that rotates the media is also large, which is one of the obstacles to miniaturization and low power. Furthermore, since the contact surface between the media and the head slides violently, there is a problem in wear resistance on both the media side and the head side. In addition, since the media and the head slide violently with a large coefficient of friction, the contact between the media and the head is extremely unstable, and spacing loss is likely to occur, resulting in unstable reproduction signal levels.

Therefore, the present invention aims to solve these problems.
The purpose is to reduce the frictional resistance between the media head and improve the wear resistance of the media head.
This aims to achieve a stable contact state between the media and the head.

[Means for Solving the Problems] The magnetic head according to the present invention is characterized in that a thin lubricating layer is formed on the contact surface with a recording medium.

[Effect]

According to the above configuration of the present invention, the lubricant layer of N1x formed on the surface of the magnetic head acts as a lubricant for the sliding contact between the media and the head, so the coefficient of friction is reduced and good contact is achieved. The condition is maintained.

〔Example〕

FIG. 1 is a sectional view of a magnetic head showing an embodiment of the present invention, in which a core 1 made of ferrite or the like, a fill 4 for magnetic recording and reproduction by the core, a coil frame 5 holding the coil, and the core A pair of sliders that hold
Slider B (number 2*5 in the figure) consists of a holding member 8 that holds a magnetic head. Reference numeral 7 denotes a thin lubricating layer, which is the key point of the present invention, and is formed by sputtering carbon. This lubricating layer is desired to be as thick as possible in consideration of wear resistance, but due to the spacing loss between the media and the core, a thickness of about several hundred layers is sufficient. Due to the effect of this lubricating layer, experiments have shown that the coefficient of friction between the media and the head is reduced by about 20%, resulting in extremely good contact conditions.

FIG. 4 is a sectional view of a magnetic head showing another embodiment of the present invention. In this embodiment, a carbon layer 11 is formed on the media contacting surface of the magnetic head with a four-layer layer 12 interposed therebetween. The carbon layer easily peels off from the sliders A and B, which are made of titanium and calcium. Therefore, as in this embodiment, it is possible to more stably form a carbon layer on the surface of the magnetic head by interposing five layers of RIP. Since this chromium layer only needs to be several tens of times thicker, spacing loss and the like are hardly a problem.

FIG. 5 shows still another embodiment of the present invention, in which a lubricant layer is sputtered only on the surfaces of slider A (2) and slider L (3).
Spacing loss between media Φ heads is no longer a problem.

〔Effect of the invention〕

As described above, according to the present invention, the coefficient of friction between the media and the head can be reduced by forming a thin clear layer made of a carbon layer on the media contacting surface of the magnetic head. Therefore, it is possible to reduce the power of the motor that rotates the media.

Furthermore, wear caused by sliding between the media and the head can be reduced, and wear resistance can also be improved. Also, the media
Since the contact between the heads becomes smooth, stable magnetic recording and reproduction becomes possible.

Further, by forming the p5 layer between the magnetic head and the carbon layer, peeling of the carbon layer can be prevented and a stable lubricating layer can be formed.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a magnetic head showing an embodiment of the present invention. FIG. 2 is a sectional view showing a conventional magnetic head. FIG. 3 is a perspective view showing a magnetic head conventionally used and also used in the present invention. FIG. 4 is a sectional view of a magnetic head showing another embodiment of the present invention. FIG. 5 is a sectional view of a magnetic head showing still another embodiment of the present invention. 6...The member that closes the core magnetic flux and above Figure 1 Saki, East ml, 17Y, plan foil 2L. Figure 4: Lid loading surface to L magnetism

Claims (3)

[Claims] (1) A magnetic head that makes sliding contact with a magnetic recording medium to perform magnetic recording and reproduction, characterized in that the magnetic head has a thin lubricating layer on a surface that contacts the recording medium. (2) The magnetic head according to claim 1, wherein the lubricant layer is carbon. (3) The magnetic head according to claims 1 and 2, wherein the lubricating layer made of carbon is formed after forming a chromium layer on the surface of the magnetic head.