Cerium oxide abrasive and method of polishing substrates
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United States of America Patent
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May 4, 2010
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app pub date -
Oct 12, 2004
filing date -
Sep 30, 1996
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Abstract
/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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