Patent ID: 7374473

Claim:
Texturing slurry for texturing a substrate for a magnetic hard disk, said texturing slurry comprising abrading particles and a dispersant for dispersing said abrading particles; wherein said abrading particles comprise diamond clusters formed with artificial diamond particles with primary particle diameter of 20 nm or less and surrounded by impurities that are attached thereto, the density of non-diamond carbon in said impurities surrounding said artificial diamond particles being 95% or more and 99% or less, the density of chlorine in the impurities other than non-diamond carbon of said diamond clusters being 0.5% or more, the cluster diameter of said diamond clusters being 30 nm or more and 500 nm or less, the average cluster diameter of said diamond clusters being 30 nm or more and 200 nm or less, and said texturing slurry containing said abrading particles by 0.005 weight % or more and 0.5 weight % or less; and wherein said dispersant comprises water and an additive, said additive containing one or more selected from the group consisting of glycol compounds, higher aliphatic amides, organic phosphates and surfactants, and said texturing slurry containing said additive by 1 weight % or more and 10 weight % or less.