POLISHING COMPOSITION CONTAINING HYBRID ABRASIVE FOR NICKEL-PHOSPHOROUS COATED MEMORY DISKS

THE INVENTION PROVIDES A POLISHING COMPOSITION THAT CONTAINS (A) AN ABRASIVE COMPRISING (I) FIRST ALPHA ALUMINA PARTICLES THAT HAVE AN AVERAGE ASPECT RATIO OF 0.8:1 TO 1.2:1, (II) SECOND ALPHA ALUMINA THAT HAVE AN AVERAGE ASPECT RATIO OF GREATER THAN 1.2:1, (III) FUMED ALUMINA PARTICLES, AND (IV) WE...

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Bibliographische Detailangaben
Hauptverfasser:	RUJEE LORPITTHAYA, HARESH SIRIWARDANE, SELVARAJ PALANISAMY CHINNATHAMBI
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES CHEMISTRY DRESSING OR CONDITIONING OF ABRADING SURFACES DYES FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS GRINDING MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS PAINTS PERFORMING OPERATIONS POLISHES POLISHING POLISHING COMPOSITIONS OTHER THAN FRENCH POLISH PREPARATION OF CARBON BLACK SKI WAXES TOOLS FOR GRINDING, BUFFING, OR SHARPENING TRANSPORTING TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS,TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES
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Beschreibung
Zusammenfassung:	THE INVENTION PROVIDES A POLISHING COMPOSITION THAT CONTAINS (A) AN ABRASIVE COMPRISING (I) FIRST ALPHA ALUMINA PARTICLES THAT HAVE AN AVERAGE ASPECT RATIO OF 0.8:1 TO 1.2:1, (II) SECOND ALPHA ALUMINA THAT HAVE AN AVERAGE ASPECT RATIO OF GREATER THAN 1.2:1, (III) FUMED ALUMINA PARTICLES, AND (IV) WET-PROCESS SILICA PARTICLES, AND (B) WATER. THE INVENTION ALSO PROVIDES A METHOD OF POLISHING A SUBSTRATE, ESPECIALLY A NICKEL-PHOSPHOROUS SUBSTRATE, WITH THE POLISHING COMPOSITION. (FIG 1)