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    • 1. 发明专利
    • Polishing solution and substrate polishing method using polishing solution
    • 抛光溶液和抛光方法使用抛光溶液
    • JP2014027146A
    • 2014-02-06
    • JP2012166995
    • 2012-07-27
    • Hitachi Chemical Co Ltd日立化成株式会社
    • YOSHIKAWA SHIGERUTANAKA TAKAAKIOTA MUNEHIROMATSUMOTO TAKAAKIYOSHIKAWA TAKAHIROSHINODA TAKASHI
    • H01L21/304B24B37/00
    • PROBLEM TO BE SOLVED: To provide a polishing solution and a substrate polishing method using the polishing solution, which can improve a polishing speed of a polished film and further improve surface smoothness after polishing in a CMP technique for polishing the polished film formed on a surface of the substrate.SOLUTION: A polishing solution for CMP of pH 4.8-5.2 contains cerium oxide particles, a pH buffer solution, a polymer compound B having a carboxylic acid group or a carboxylate group, and water. The pH buffer solution has an amount of pH change between a liquid concentrate pH and pH after 3 fold dilution of the buffer solution is 0.2 and under and the buffer solution contains acid A having pKa of 4-6, in which a content of the polymer compound B to a total mass of the polishing solution is 0.02 mass% and over and a total of contents of the acid A and the polymer compound B is 0.6 mass% and under with respect to the total mass of the polishing solution.
    • 要解决的问题:提供一种使用抛光液的抛光溶液和基板研磨方法,其可以提高抛光膜的抛光速度,并且在用于抛光形成在表面上的抛光膜的CMP技术中进一步提高抛光后的表面平滑度 的溶液。溶液:pH 4.8-5.2的CMP抛光溶液含有氧化铈颗粒,pH缓冲溶液,具有羧酸基团或羧酸盐基团的高分子化合物B和水。 pH缓冲溶液在缓冲溶液稀释3倍以后在液体浓度pH和pH之间具有一定量的pH值变化,缓冲溶液含有pKa为4-6的酸A,其中聚合物的含量 化合物B相对于研磨液的总质量为0.02质量%以上,酸A和高分子化合物B的总含量为0.6质量%以下。