Fabrication method of semiconductor integrated circuit device

In order to reduce micro scratches which tend to occur during chemical-mechanical polishing, a polishing slurry is diluted with deionized water immediately before it is supplied in a gap between a polishing pad and the surface of a wafer to be polished. By diluting the polishing slurry with deionize...

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Bibliographic Details
Main Authors ABE HISAHIKO, TSUCHIYAMA HIROFUMI, NISHIGUCHI TAKASHI, HIYAMA MASAKI, NAKABAYSHI SHINICHI
Format Patent
LanguageEnglish
Published 09.12.2004
Edition7
Subjects
ADHESIVES
BASIC ELECTRIC ELEMENTS
CHEMISTRY
DRESSING OR CONDITIONING OF ABRADING SURFACES
DYES
ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
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
SEMICONDUCTOR DEVICES
SKI WAXES
TRANSPORTING
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Summary:In order to reduce micro scratches which tend to occur during chemical-mechanical polishing, a polishing slurry is diluted with deionized water immediately before it is supplied in a gap between a polishing pad and the surface of a wafer to be polished. By diluting the polishing slurry with deionized water to increase its volume, the concentration of coagulated particles contained in the polishing slurry can be lowered. For a mixture ratio of the polishing slurry and deionized water, about 1 (polishing slurry): 1-1.2 (deionized water) is used, and the concentration of silica contained in the diluted polishing slurry is adjusted to about 3-9 weight %, preferably about 4-8 weight %, and more preferably about 8 weight %.
Bibliography:Application Number: US20040883754