MIXED ABRASIVE POLISHING COMPOSITIONS

摘要

The invention provides chemical-mechanical polishing compositions and methods of chemically-mechanically polishing a substrate with the chemical-mechanical polishing compositions. The polishing compositions comprise first abrasive particles, wherein the first abrasive particles are ceria particles, second abrasive particles, wherein the second abrasive particles are ceria particles, surface-modified silica particles, or organic particles, a pH-adjusting agent, and an aqueous carrier. The polishing compositions also exhibit multimodal particle size distributions.