Increased wetting of colloidal silica as a polishing slurry
First Claim
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1. A method of polishing a sapphire surface, comprising:
- abrading a sapphire surface with a rotating polishing pad and a polishing composition,wherein the polishing composition comprises an effective amount of colloidal silica and a surfactant, the colloidal silica has a particle size distribution of from about 5 nm to about 120 nm;
the ratio of the standard deviation of the particle size of the colloidal silica (CT) to the mean particle size of the colloidal silica (r) is from about 0.30 to about 0.90; and
the surfactant is one represented by the following formula I or II,
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Abstract
A method, kit, and composition for polishing a sapphire surface are described here. The invention involves a sapphire surface polishing composition comprising colloidal silica particles and an extended or gemini surfactant that can reduce the contact angles of the polishing composition on both polishing pads and sapphire surfaces.
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Citations
18 Claims
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1. A method of polishing a sapphire surface, comprising:
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abrading a sapphire surface with a rotating polishing pad and a polishing composition, wherein the polishing composition comprises an effective amount of colloidal silica and a surfactant, the colloidal silica has a particle size distribution of from about 5 nm to about 120 nm;
the ratio of the standard deviation of the particle size of the colloidal silica (CT) to the mean particle size of the colloidal silica (r) is from about 0.30 to about 0.90; and
the surfactant is one represented by the following formula I or II, - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification