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Polishing liquid for hard disk recording heads and preparation method thereof

A polishing liquid and magnetic head technology, applied in polishing compositions containing abrasives, etc., can solve problems such as failure of the magnetic head surface, and achieve the effects of good quality, good suspension stability, and good dispersion uniformity.

Inactive Publication Date: 2014-07-02
杨飏 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Hard disk magnetic head polishing has very high quality requirements, and the surface of the magnetic head is prone to failure after the general polishing liquid is used.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1: The present invention is used for the polishing fluid of hard disk magnetic head, comprises following components: 2 parts of nanoscale diamond powders, 1 part of FA / O nonionic active agent, 3 parts of FA / O chelating agents, 100 parts of hydrocarbon solvents, 1 part of oxidizing agent, 0.3 parts of corrosion inhibitor, in parts by weight. The particle diameter of the nanometer diamond powder is 3-18nm. The hydrocarbon solvent is white oil. The oxidizing agent is hydrogen peroxide. The corrosion inhibitor is tolyl benzotriazole.

[0021] The preparation method of described polishing fluid for hard disk magnetic head, comprises the steps:

[0022] (1) Add nano-sized diamond powder to FA / O non-ionic active agent, heat at 65°C and mix to make the powder wet;

[0023] (2) Add the powder obtained in step (2) into a hydrocarbon solvent, add FA / O chelating agent, oxidizing agent and corrosion inhibitor, then stir and disperse evenly by ultrasonic to obtain a poli...

Embodiment 2

[0024] Example 2: The present invention is used for the polishing liquid of hard disk magnetic head, and its component and preparation method are with embodiment 1, difference is: 1 part of nanoscale diamond powder, 0.5 part of FA / O nonionic active agent, 0.5 part of FA / O chelating agent, 90 parts of hydrocarbon solvent, 0.3 part of oxidizing agent, and 0.5 part of corrosion inhibitor.

Embodiment 3

[0025] Example 3: The present invention is used for the polishing liquid of hard disk magnetic head, and its component and preparation method are with embodiment 1, and difference is: 3 parts of nanoscale diamond powders, 4 parts of FA / O nonionic active agents, 5 parts of FA / O chelating agents, 150 parts of hydrocarbon solvent, 2 parts of oxidizing agent, 0.2 part of corrosion inhibitor.

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Abstract

The invention discloses a polishing liquid for hard disk recording heads, which comprises the following components in parts by weight: 1-3 parts of nanoscale diamond powder, 0.5-4 parts of a FA / O non-ionic surfactant, 0.5-5 parts of a FA / O chelating agent, 90-150 parts of a hydrocarbon solvent, 0.3-2 parts of an oxidizing agent, and 0.2-0.5 part of a corrosion inhibitor. Products of the invention are applied to the polishing process of hard disk recording heads, and detections show that both the surface quality and performance of hard disk recording heads accord with the requirements on the polishing quality of recording heads, the polishing efficiency is high, the quality is good, and no failure phenomenon occurs.

Description

technical field [0001] The invention relates to a polishing liquid and a preparation method thereof, in particular to a polishing liquid used for hard disk magnetic heads and a preparation method thereof. Background technique [0002] One of the commonly used methods of surface treatment during polishing is to eliminate the slight unevenness of the surface and make the surface have a specular luster. Polishing can not only beautify the product, but also an important means to ensure product quality, prolong service life and develop new varieties, and sometimes it can also play a role in product appreciation. [0003] Polishing can be divided into mechanical polishing, chemical polishing and electrochemical polishing, and the polishing liquid is mainly used for chemical polishing and electrochemical polishing. Mechanical polishing mainly uses the fine abrasives of the polishing wheel and the polishing paste to slightly cut and grind the parts, remove the fine unevenness on th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09G1/02
Inventor 杨飏宋奇吼
Owner 杨飏
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