| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a manufacturing method of a glass hard disk substrate with excellent cycling durability capable of satisfying both of a high polishing speed and low surface roughness. <P>SOLUTION: A manufacturing method of a glass hard disk substrate includes a step of polishing a glass substrate to be polished by using a polishing liquid composition that contains an abrasive material, an acid, a poly-hydroxybenzene compound having at least two hydroxyl groups or more adjacent to each other on a benzene ring and water, and is from pH1.0 to 4.0. <P>COPYRIGHT: (C)2012,JPO&INPIT |
