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Texturing processing composition

A composition and texture technology, used in metal processing equipment, manufacturing tools, other chemical processes, etc., can solve problems such as reduced processing speed and difficulty in removing grinding marks

Inactive Publication Date: 2007-06-20
RESONAC HOLDINGS CORPORATION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In order to reduce the roughness of the textured surface and form fine texture streaks, it is necessary to use tiny particles or powders, but usually the processing speed is reduced due to the smaller particles, so it is difficult to remove "grinding marks" or "grinding scratches" by texturing. mark"

Method used

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Examples

Experimental program
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Effect test

Embodiment

[0147] The present invention will be described in detail below, but the present invention is not limited by the following Examples.

[0148] In the following examples, as shown in table 1-table 2, as diamond, use by the amount shown in the table respectively: as nano-diamond, specific surface area 280m 2 / g, average secondary particle size D 50 Nano-diamond of 0.12 μm (manufactured by an oxygen-deficient explosion method, nano-diamond crystal clusters with graphite impurities removed from the surface), as a polycrystalline diamond, the specific surface area is 60m 2 / g, average secondary particle size D 50 0.12μm polycrystalline diamond (manufactured by the impact compression method, polycrystalline diamond with graphite impurities removed from the surface), as a single crystal diamond, the specific surface area is 40m 2 / g, average secondary particle size D 50 0.11 μm single crystal diamond (manufactured by the static pressure method, the surface graphite impurities have b...

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PUM

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Abstract

A composition of high processing rate that is capable of not only decreasing the post-texturing average surface roughness (Ra) of a glass-made magnetic disk surface and aluminum-made magnetic disk underlayer and forming minute texturing striation but also removing ''grinding traces'' and ''grinding scratch'' appearing on the underlayer and surface which are attributed to substrate grinding operation. There is provided a texturing processing composition used for texturing processing of an aluminum-made magnetic disk underlayer or glass-made magnetic disk surface, which composition comprises diamond nanoparticles of = 150 m2 / g specific surface area (A), a C10-C22 fatty acid or fatty acid metal salt (B), and an organic amine compound (C).

Description

technical field [0001] The present invention relates to a composition for texturing that makes a magnetic disk have texture streaks, and relates to a composition that can quickly form fine texture streaks and can reduce the average surface roughness (Ra) of a textured base layer, Furthermore, a composition for texturing at a high processing speed can be obtained. Background technique [0002] In order to meet the recent increasing demand for recording density of magnetic disks, the distance between the magnetic disk surface and the magnetic head has become smaller and smaller. Therefore, the surface of the disk must be as flat as possible, but as the disk is flattened, the disk cannot be driven after it stops (the industry refers to this as "magnetic head adsorption", and the hard disk drive cannot be started. Until a few years ago , In order to prevent such "adsorption of the magnetic head", so-called texturing is generally performed on the base layer (lower layer of the m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B5/84B24B37/00C09K3/14
CPCG11B5/8404
Inventor 山田二郎神田惠林良树
Owner RESONAC HOLDINGS CORPORATION
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