Alkaline computer hard disk polishing liquid and producing method thereof

A polishing liquid and computer technology, which is applied in the production process field of computer hard disk polishing liquid, can solve the problems of elimination, edge loss, increase production cost, etc., and achieve the effect of enhancing life and reducing polishing loss.

Inactive Publication Date: 2007-08-15
孙韬
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Long-time polishing often leads to serious edge loss, and the remaining serious scratches are difficult to eliminate in the second step of fine polishing, which greatly reduces polishing efficiency and increases production costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0021] 160 g of oxidizing agent potassium peroxoborate was added while stirring in 6345 g of deionized water. After dissolving, an aqueous solution of potassium peroxoborate is made. Add 160g of organic complexing agent citric acid to potassium peroxoborate aqueous solution, stir for 10 minutes, then add 533g concentration of 30% grinding agent crystalline alumina alumina suspension, and 800g, average particle size is 80nm, concentration is 30 % abrasive silica sol. Stir well.

[0022] According to needs, add one or more polymer surfactant metal complex film forming agents 0-10g.

[0023] Finally, adjust the pH value of the suspension to 9 with phosphoric acid to obtain 8000 g of alkaline computer hard disk polishing solution.

example 2

[0025] Add 160g of organic complexing agent citric acid into 6344g of deionized water and stir for ten minutes, then add 533g of abrasive cerium oxide with a concentration of 30%, and 800g of abrasive silica sol with a fineness of 80nm and a concentration of 30% . Stir well.

[0026] According to needs, add one or more polymer surfactant metal complex film-forming agents 1g.

[0027] The pH of the suspension was adjusted to 8.5 with phosphoric acid.

[0028] Before use, add 160g of potassium peroxoborate as an oxidizing agent and stir evenly to prepare 8000g of alkaline computer hard disk polishing solution.

[0029] Other examples can be prepared in proportion in a sequential manner.

[0030] In the above two examples, the oxidizing agent can be ferric nitrate, manganate, permanganate, chromate, superchromate, chlorate, perchlorate, iodate, periodate, peroxysulfuric acid One or more of salt, peroxoborate, peracetic acid, and peroxyisobutyric acid. The organic complexing ...

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Abstract

The invention discloses a preparing method of alkality computer hard disk polishing liquid in chemical preparation domain, which comprises the following steps: setting pH value of polishing liquid at 7-10; making the mass percent of oxidant, organic complexing agent and grinding agent at 0.1%-5%, 0.1%-5% and 0.5%-20% separately; composing ingredient A with diamond pyramid hardness bigger than 7 and ingredient B with diamond pyramid hardness bigger than 5; getting grinding agent; forming oxidant, organic metal chelating agent, high hardness and low hardness rubbing agent in neutral and alkality agent; adopting soft and hard merging multiple polished rubbing particle method; decreasing grievous fish tail caused by big particle boule aluminum oxide; increasing graduation efficiency; This invention adopts alkality polishing agent, which decreases the polishing loss of hard disk edge.

Description

technical field [0001] The invention relates to the production field of chemical preparations, in particular to the production process of computer hard disk polishing fluid. Background technique [0002] The current computer hard disk polishing fluid mainly uses large particles of corundum alumina as polishing friction agent, especially for initial polishing products, which is easy to cause corrosion of equipment, and even serious defects such as scratches on the surface of workpieces and low flattening and polishing efficiency. At present, the polishing products produced by the computer hard disk initial polishing liquid products widely used in the market need to use a very long second step of fine polishing time. Long-time polishing often leads to serious edge loss, and the remaining severe scratches are difficult to eliminate in the second step of fine polishing, which greatly reduces polishing efficiency and increases production costs. Contents of the invention [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09G1/02C09G1/14B24B29/00
Inventor 孙韬
Owner 孙韬
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