JPS59227065A - Magnetic head - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Technical Field of the Invention The present invention relates to a magnetic head, and in particular to a magnetic head with a smooth C85 (Contact
This invention relates to a magnetic head that can be driven (t 5 tart 5 top).

(b) Background of the Technology In recent years, in magnetic disk drives, attempts have been made to increase the recording density by making the magnetic film of the magnetic disk thinner or multilayered, and by lowering the flying height of the magnetic head. In addition to lowering the flying height of the magnetic head, the magnetic head is in contact with the surface of the magnetic disk when stopped, and as the rotational speed increases, the magnetic head is slightly levitated and information is transferred to the surface of the magnetic disk. The so-called CS S (Contact 5tart '5top
) As the adoption of this system progresses, problems such as abrasion and damage to the magnetic disk surface, magnetic throat, and slider surface are likely to occur due to contact and sliding when the rotation of the magnetic disk is started and stopped. Therefore, in order to prevent such troubles, the surface of the magnetic disk should be coated with a lubricant such as perfluoropolyalkyl ether, a higher fatty acid made of stearic acid, or a higher fatty acid ester, or be lubricated using the same lubricant. Surface treatment such as coating the membrane is generally performed.

(C) Prior art and problems However, when operating a magnetic head in the CSS method on a magnetic disk coated with a lubricant or lubricant film as described above, the magnetic head placed in contact with the surface of the magnetic disk,
The phenomenon of adsorption by the lubricant or lubricant film tends to occur, and due to this, when the magnetic disk starts rotating, the magnetic head is pulled in the adsorbed state, and the gimbal of the magnetic head is damaged. Furthermore, there is a drawback that the magnetic head bounces back and causes fatal damage to the magnetic disk surface. The attraction phenomenon of the magnetic head as described above is greatly influenced by the thickness of the lubricant or lubricant film applied to the surface of the magnetic disk. That is, as the amount of lubricant applied to the magnetic disk surface increases, the lubrication durability of the magnetic disk surface improves, but on the other hand, the adsorption of the magnetic head also becomes stronger.

On the other hand, if the amount of lubricant applied is small, the attraction phenomenon of the magnetic head is eliminated, but this has the opposite effect of reducing the lubricity of the magnetic disk surface, and the durability of this lubrication and the elimination of the attraction phenomenon are It was extremely difficult to achieve both.

(dl Purpose of the Invention) In order to eliminate the above-mentioned drawbacks of the conventional art, the present invention makes the slider surface of the magnetic head a surface with a low coefficient of friction, oil repellency, and water repellency, thereby reducing the adhesion force with the lubricant on the surface of the magnetic disk. The object of the present invention is to provide a new magnetic head that reduces the amount of CSS and enables smooth CSS operation.

(Q) Structure and object of the invention According to the present invention, there is provided a magnetic head for recording and reproducing information on the surface of a magnetic recording medium, the slider surface of the magnetic head facing the magnetic recording medium surface being roughened. This is achieved by providing a magnetic head characterized in that the recessed portion of the rough surface is filled with a fluororesin.

(f) Embodiments of the invention Embodiments of the invention will be described in detail below with reference to the drawings.

FIG. 1 is a perspective view showing an embodiment of the magnetic head according to the present invention, in which 1 is a head/slider base made of ferrite, 2 is a magnetic helad core, 3 is a coil, 4 is a magnetic head gap, and 5 is a slider. In the present invention, the slider surface 5 is roughened in advance by etching or the like, and a fluororesin layer having a low coefficient of friction and oil and water repellency, that is, polytetrafluoroethylene ( For example, the structure is such that the layer 6 is coated with Teflon manufactured by Du Pout, Lublon manufactured by Daikin Industries, etc.). Alternatively, after roughening the slider surface 5 and coating the polytetrafluoroethylene (for example, Teflon manufactured by DuPou, Lublon manufactured by Daikin Industries, etc.) N6 on the surface, Polytetrafluoroethylene (PTF)
The layer 6 (referred to as E) is lapped and polished until the base ferrite is exposed, leaving the PTFE layer 6 only in the rough concave portions of the slider surface 5, and partially exposing the PTFE layer 6 on the slider surface 5. The configuration is as follows.

By configuring the slider surface 5 of the magnetic head to be treated with PTFE in this manner, the PTFE layer 6 is adhered to the slider surface 5 with good adhesion, and the adhesion force with the lubricant on the surface of the magnetic disk is reduced. As a result, the conventional attraction phenomenon of the magnetic head to the surface of the magnetic disk is eliminated.

When coating the entire surface of the slider surface 5 of the magnetic head with the PTFE layer 6, for example, as shown in FIG. While heated to a temperature of .degree. C., aluminum (AI) is deposited to a thickness of 0.2 .mu.m by a vapor deposition method or a spunter method to form an AI film 21 with large crystal grains. Next, the A1 film 21 is coated with carbon tetrachloride (CCl4
) By plasma etching using a reactive gas, each crystal grain is selectively etched to about % or less from the grain boundary portion.

Next, using each A1 crystal grain as a mask, the slider surface 5 of the head/slider base 1 made of ferrite is selectively etched by plasma etching using carbon tetrafluoride (CFa) reactive gas, and then the above-mentioned etching process is performed. The AI crystal grains used as a mask are selectively etched away by plasma etching using a reactive gas of CCl4. After the slider surface 5 is thus roughened as shown in FIG. 3, a fluororesin paint diluted with a solvent such as methyl ethyl ketone, such as Du Pout, is applied onto the rough surface.
Co., Ltd.'s Teflon S1 or Daikin Industries, Inc.'s Lublon, etc. is applied by spin code method, and then baked at several hundred degrees to form the slider surface 5 of the magnetic head as shown in Fig. 4.
The PTFIi layer 6 is coated with good adhesion.

In addition, PTF is applied only to the rough concave portion of the slider surface 5 of the magnetic head.
To provide the E layer 6 to partially expose the PTFE layer 6 on the slider surface 5, first, as shown in FIG. 5, on the slider surface 5 of the head slider base 1 made of ferrite, Titanium (T) is deposited by vapor deposition or sputtering.
i) Depositing the film 51.

Subsequently, while heating the substrate 1 to a temperature of about 200° C., aluminum (AI) is deposited to a thickness of 0.2 μm by vapor deposition or sputtering to obtain crystal grains with a grain size l, )A.
An I film 52 is formed. Then, as shown in FIG.
1*52 is etched by plasma etching using a reactive gas of carbon tetrachloride (CCl4) until the titanium film 51 is exposed along its crystal grain boundaries. Next, as shown in FIG. 7, each AI crystal grain 52a is used as a mask,
The titanium film 51 is selectively etched by plasma etching using carbon tetrafluoride (CFa) reactive gas to expose the slider surface 5 of the head/slider base 1 made of ferrite. Thereafter, the slider surface 5 is subjected to ion etching using argon gas (Ar), and the etching is completed when the titanium film 51 disappears.

In this way, the slider surface 5 is roughened, so that
Here, a fluororesin paint diluted with a solvent such as methyl ethyl ketone, such as Teflon S1 manufactured by Du Pout Co., Ltd. or Lublon manufactured by Daikin Industries, Ltd., is applied onto the rough surface by a spin code method, and then baked at several hundred degrees. do. Next, PT formed on the slider rough surface
The FE layer 6 is lapped and polished until the base ferrite is exposed, and P is applied only to the rough concave portions of the slider surface 5.
The PTFE layer 6 is partially exposed on the slider surface 5 with the TFE layer 6 remaining. At this time, the PTFH surface partially exposed due to its elasticity allows the slider surface 5 to
It becomes a more microscopically protruding shape. In this way, the magnetic head aimed at by the present invention can be easily obtained.

fgl Effects of the Invention As is clear from the above description, the magnetic head according to the present invention has a fluororesin layer on the head slider surface that has a low coefficient of friction and has oil and water repellency, such as polytetrafluoroethylene ( The structure with the PTFH layer has the advantage that the adhesion force with the lubricant on the surface of the magnetic disk is reduced, making it possible to perform CSS operations smoothly. Therefore, the same effect can be obtained not only in the magnetic head described in this embodiment but also in a structure in which a PTFH layer is deposited on the slider surface of a thin film magnetic head by sputtering, for example.

[Brief explanation of drawings]

FIG. 1 is a perspective view illustrating an embodiment of the magnetic head according to the present invention, and FIGS. 2 to 4 show an embodiment of the method for attaching a PTFH layer to the slider surface of the magnetic head according to the present invention. 5 to 8 are cross-sectional views of main parts explaining in order of steps another embodiment of a method for attaching a PTFH layer to the slider surface of a magnetic head according to the present invention. . In the drawings, 1 is a head/slider base, 2 is a magnetic helad core, 3 is a coil, 4 is a magnetic head gap, 5 is a slider surface, and 6 is polytetrafluoroethylene lit.
(PTFH layer) 2L52 is an AI film, 51 is a titanium film, and 52a is an AI crystal grain. Figure 1 Figure 2 Figure 3 Figure 4 IA Figure 5 Figure 6 Figure 7 Figure 8

Claims (1)

[Scope of Claims] (11) A magnetic head for recording and reproducing information on the surface of a magnetic recording medium, wherein a slider surface of the magnetic head facing the magnetic recording medium surface has a rough surface shape, and recesses in the rough surface (2) A magnetic head according to claim (1), characterized in that the slider surface is coated with a fluororesin layer. .