Claims
- 1. A hard-disc polishing composition comprising water, a polishing material, a polishing accelerator, and at least one of hydroxypropyl cellulose or hydroxyalkyl cellulose,wherein the polishing accelerator comprises an organic acid and at least one of an organic acid salt or an inorganic acid salt.
- 2. A hard-disc polishing composition according to claim 1, wherein the polishing material is selected from the group consisting of alumina, silica, titania, zirconia, and ceria.
- 3. A hard-disc polishing composition according to claim 1, wherein the polishing material is alumina.
- 4. A hard-disc polishing composition according to claim 1, wherein the polishing accelerator comprises an organic acid or an inorganic acid salt.
- 5. A hard-disc polishing composition according to claim 4, wherein the organic acid is at least one species selected from the group consisting of malonic acid, succinic acid, adipic acid, lactic acid, malic acid, citric acid, glycine, aspartic acid, tartaric acid, gluconic acid, heptogluconic acid, iminodiacetic acid, and fumaric acid.
- 6. A hard-disc polishing composition according to claim 4, wherein the inorganic acid salt is at least one species selected from the group consisting of sodium sulfate, magnesium sulfate, nickel sulfate, aluminum sulfate, ammonium sulfate, nickel nitrate, aluminum nitrate, ammonium nitrate, ferric nitrate, aluminum chloride, and nickel sulfamate.
- 7. A hard-disc polishing composition according to claim 1, wherein the organic acid salt is a potassium salt, a sodium salt or an ammonium salt of malonic acid, succinic acid, adipic acid, lactic acid, malic acid, citric acid, glycine, aspartic acid, tartaric acid, gluconic acid, heptogluconic acid, iminodiacetic acid, or fumaric acid.
- 8. A hard-disc polishing composition according to claim 1, wherein the amount of the polishing accelerator is 0.01-10 wt. % based on the total composition.
- 9. A hard-disc polishing composition according to claim 1, wherein the hydroxyalkyl alkyl cellulose is at least one species selected from the group consisting of hydroxypropyl methyl cellulose, hydroxyethyl methyl cellulose, and ethyl hydroxyethyl cellulose.
- 10. A hard-disc polishing composition according to claim 1, wherein the amount of hydroxypropyl cellulose and/or hydroxyalkyl alkyl cellulose is 0.001-2 wt. % based on the total composition.
Priority Claims (1)
Number |
Date |
Country |
Kind |
11-279112 |
Sep 1999 |
JP |
|
CROSS REFERENCE TO THE RELATED APPLICATION
This is a divisional of application Ser. No. 09/672,774 filed Sep. 29, 2000 U.S. Pat. No. 6,488,729; the disclosure of which is incorporated herein by reference.
This patent application is entitled to the benefit of the priority based on U.S. Provisional Application No. 60/186,284 filed on Mar. 1, 2000.
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Provisional Applications (1)
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Number |
Date |
Country |
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60/186284 |
Mar 2000 |
US |