JPH07326183A - Washing method of magnetic recording apparatus component - Google Patents

Abstract

PURPOSE:To reduce adsorbed organic solvent and improve the reliability by a method wherein a process in which a magnetic recording apparatus component is washed with alcohol such as methanol or solution containing alcohol after it is washed with the organic solvent is provided. CONSTITUTION:After a process 11 in which a magnetic recording apparatus component l is washed with organic solvent, a process 12 in which it is washed with alcohol such as methanol is provided. That is, an aluminum head whose surface is coated, a disc and an assembly cover which are the components l are washed with any one among methylene chloride, trichloroethane, Fron 113 and AK-225. The washing method is such that an automatic washing line is used and the components 1 are washed in a steam bath at a temperature of 50-60 deg.C for 1.5 min. first and, successively, subjected to ultrasonic washing in a hot bath at a temperature about 40 deg.C for 1.5min. and, finally, washed in a steam bath at a temperature of 50 deg.C for 0.6min. Then the components l are washed again with any one among methanol, ethanol and isopropanol in the similar process. With this constitution, the adsorbed organic solvent is reduced to 12-53% of the initial value and the reliability can be improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of cleaning a magnetic recording device member, and more particularly to a magnetic recording device having a step of cleaning the magnetic recording device member with an organic solvent and then further cleaning with alcohol such as methanol or an alcohol aqueous solution. The present invention relates to a method for cleaning a member.

[0002]

2. Description of the Related Art In a conventional method for cleaning a magnetic recording device member, the magnetic recording device member is cleaned with an organic solvent and then used by incorporating the magnetic recording device member into a predetermined device. The device was assembled while those organic solvents were adsorbed on the magnetic recording device members.

[0003]

The conventional magnetic recording device member described above is designed to be used by incorporating it into a predetermined device after cleaning the magnetic recording device member with an organic solvent. There was a problem that the reliability of the magnetic recording device was impaired due to the generation of an organic solvent as a gas, the damage due to the other organic solvent mixed with the organic solvent adsorbed on the magnetic recording device member, and the dust. .

[0004]

An object of the present invention is to improve the disadvantages of the conventional example and reduce the organic solvent adsorbed to the magnetic recording device member, thereby improving the reliability of the magnetic disk device. It is an object of the present invention to provide a cleaning method of

[0005]

The present invention comprises a step of cleaning a magnetic recording device member, in which the magnetic recording device member is cleaned with an organic solvent and then with an alcohol such as methanol or a cleaning liquid containing alcohol. ing,
Etc. are adopted. This aims to achieve the above-mentioned object.

[0006]

[Operation] Alcohol such as methanol mixes well with the organic solvent, so that the organic solvent adsorbed on the magnetic recording device member can be easily removed from the magnetic recording device member. When the gas concentration is measured by a gas chromatograph in the sample bag, it is clear that the amount of the organic solvent remaining in the member is drastically reduced.

[0007]

[First Embodiment] A first embodiment of the present invention will be described below with reference to FIG.

In the first embodiment shown in FIG. 1, in the cleaning process of the magnetic recording device member 1, the magnetic recording device member 1 is
It comprises a step 11 of washing with an organic solvent and a step 12 of washing with an alcohol such as methanol after that.

This will be described in more detail. First, the HDA made of aluminum whose surface is coated as the magnetic recording device member 1
(Head / Disk / Assembly) The cover was washed with four kinds of organic solvents shown in Table 1.

[0010]

[Table 1]

The cleaning method uses a 4-step automatic cleaning line. First, cleaning is performed in a steam bath at 50 to 60 ° C. for 1.5 minutes, and then ultrasonic cleaning is performed in a warm bath at about 40 ° C. for 1.5 minutes, and further 3 minutes.
Sonicate for 1.5 minutes in a 0 ° C cold bath, and finally about 50 °
It was washed for 0.6 minutes in the steam tank of C.

Although the conventional cleaning is finished here, in this embodiment, the magnetic recording device member 1 was further cleaned again in the same process with any one of methanol, ethanol and isopropanol. Since methanol, ethanol, and isopropanol mix well with the organic solvent, the organic solvent adsorbed on the magnetic recording device member 1 can be easily removed from the magnetic recording device member 1. The washed magnetic recording device member 1 was immediately put in a sample bag, capped, and left in a constant temperature bath at 80 ° C. for 24 hours. Then, the gas concentration in the sample bag was measured by a gas chromatograph. This indicates the amount of organic solvent remaining on the member. The results are shown in Table 2.
Shown in.

[0013]

[Table 2]

Table 2 shows the values when the gas concentration in the conventional cleaning method is 1.00. It has been revealed that the organic solvent adsorbed on the magnetic recording device member 1 is significantly reduced by this cleaning method, and the damage due to other organic solvents and dust is eliminated.

[0015]

[Second Embodiment] Next, a second embodiment will be described with reference to FIG.

In the embodiment shown in FIG. 2, in the cleaning process of the magnetic recording device member 1, a process 11 for cleaning the magnetic recording device member 1 with an organic solvent and a process 12 for subsequently cleaning with an alcohol such as methanol are performed. Then, a step 21 of further cleaning with pure water is provided.

This will be described in more detail. First Embodiment described above.
The magnetic recording device member 1 cleaned in step 1 was further ultrasonically cleaned in warm pure water at 60 ° C. for 3 minutes. As a result, the methanol, ethanol and isopropanol adsorbed on the magnetic recording device member 1 could be easily removed from the magnetic recording device member 1.

Since the hydroxyl group of alcohol is hydrophilic, it is washed with pure water. Similar to the method of Example 1, the alcohol gas concentration in the sample bag was measured by gas chromatography. The results are shown in Table 3.

[0019]

[Table 3]

[0020]

Third Embodiment Next, a third embodiment will be described with reference to FIG.

The embodiment shown in FIG. 3 comprises a step 11 of washing the magnetic recording device member 1 with an organic solvent and a step 31 of washing the magnetic recording device member 1 with an alcohol aqueous solution in the step of washing the magnetic recording device member 1. ing.

As a result, in Example 1 described above, washing was performed with any of methanol, ethanol, and isopropanol, but in this Example, after washing with an aqueous solution of any of methanol, ethanol, and isopropanol, No need to wash with pure water. Also in this example, the organic solvent adsorbed on the magnetic recording device member 1 could be easily removed from the magnetic recording device member 1. Table 4 shows the result of measuring the alcohol gas concentration by the same method as in Example 2.

[0023]

[Table 4]

[0024]

Fourth Embodiment Next, a fourth embodiment will be described with reference to FIG.

In the embodiment shown in FIG. 4, in the cleaning process of the magnetic recording device member 1, a process 11 of cleaning the magnetic recording device member 1 with an organic solvent and a process 12 of subsequently cleaning it with alcohol such as methanol. And then further cleaning with pure water 21. Further, this pure water cleaning step 21
After the above, a vacuum drying step 41 for drying for 1 hour under a vacuum condition of 10 [Torr] is provided.

As a result, even the moisture adsorbed on the magnetic recording device member 1 can be easily removed from the magnetic recording device member 1. Here, the water content was measured in the same manner as in the method for measuring the gas concentration in Example 1 described above. The results are shown in Table 5. Table 5 shows the values when the water content in the conventional cleaning method is 1.00.

[0027]

[Table 5]

Here, in the cleaning method of the third embodiment, the same effect can be obtained when the processing of this embodiment is performed after cleaning.

[0029]

As described above, according to the present invention,
Since the cleaning is performed with alcohol such as methanol, the organic solvent adsorbed on the magnetic recording device member can be greatly reduced, and thus the reliability of the magnetic disk device can be surely improved. A method of cleaning a magnetic recording device member can be provided.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a first embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a second embodiment of the present invention.

FIG. 3 is an explanatory diagram showing a third embodiment of the present invention.

FIG. 4 is an explanatory diagram showing a fourth embodiment of the present invention.

[Explanation of symbols]

 1 Magnetic Recording Device Member 11 Cleaning Process with Organic Solvent 12 Cleaning Process with Alcohol such as Methanol 21 Cleaning Process with Pure Water 31 Cleaning Process with Alcohol Aqueous Solution 41 Vacuum Drying Process

Claims (4)

[Claims] 1. In a cleaning process of a magnetic recording device member,
A method of cleaning a magnetic recording device member, comprising a step of cleaning the magnetic recording device member with an organic solvent and then with an alcohol such as methanol. 2. In the step of cleaning a magnetic recording device member,
A method of cleaning a magnetic recording device member, comprising the steps of cleaning the magnetic recording device member with an organic solvent and then with alcohol such as methanol, and then with pure water. 3. In the step of cleaning the magnetic recording device member,
A method of cleaning a magnetic recording device member, comprising the step of cleaning the magnetic recording device member with an organic solvent and then with an alcohol aqueous solution containing methanol and the like. 4. In a cleaning process of a magnetic recording device member,
A method for cleaning a magnetic recording device member, comprising the steps of cleaning the magnetic recording device member with an organic solvent and then with an alcohol such as methanol, and then further drying it under a vacuum condition.