Cerium oxide abrasive and method of polishing substrates

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United States of America Patent

PATENT NO 7867303
APP PUB NO 20060180787A1
SERIAL NO

11276161

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Abstract

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/g, and slurry particles have a median diameter of from 150 nm to 600 nm. The cerium oxide particles have structural parameter Y, representing an isotropic microstrain obtained by an X-ray Rietveld method (with RIETAN-94), of from 0.01 to 0.70, and structural parameter X, representing a primary particle diameter obtained by an X-ray Rietveld method (with RIETAN-94), of from 0.08 to 0.3. The cerium oxide abrasive slurry is made by a method of obtaining particles by firing at a temperature of from 600° C. to 900° C. and then pulverizing, then dispersing the resulting cerium oxide particles in a medium.

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Patent Owner(s)

Patent OwnerAddress
HITACHI CHEMICAL CO LTDTOKYO TOKYO METROPOLIS

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ashizawa, Toranosuke Ibaraki-ken, JP 38 314
Kurata, Yasushi Ibaraki-ken, JP 64 744
Matsuzawa, Jun Ibaraki-ken, JP 31 312
Ootuki, Yuuto Ibaraki-ken, JP 12 130
Tanno, Kiyohito Ibaraki-ken, JP 13 189
Terazaki, Hiroki Ibaraki-ken, JP 24 239
Yoshida, Masato Ibaraki-ken, JP 214 2996

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