METHOD FOR MANUFACTURING AN ALUMINOSILICATE GLASS SUBSTRATE FOR HARD DISKS

摘要

A METHOD FOR MANUFACTURING AN ALUMINOSILICATE GLASS SUBSTRATE FOR A HARD DISK OF THE PRESENT INVENTION INCLUDES POLISHING AN ALUMINOSILICATE GLASS SUBSTRATE TO BE POLISHED WITH A POLISHING COMPOSITION THAT INCLUDES SILICA PARTICLES, A POLYMER HAVING A SULFONIC ACID GROUP, AND WATER, WHEREIN AN ADSORPTION CONSTANT OF THE POLYMER HAVING THE SULFONIC ACID GROUP ON ALUMINOSILICATE GLASS IS 1.5 TO 5.0 L/G. THE POLYMER HAVING THE SULFONIC ACID GROUP IS PREFERABLY A POLYMER HAVING AN AROMATIC RING. THE WEIGHT AVERAGE MOLECULAR WEIGHT OF THE POLYMER HAVING THE SULFONIC ACID GROUP IS 3000 TO 100000.