SUBSTRATE FOR MAGNETIC DISK, METHOD FOR MANUFACTURING THE SAME, AND MAGNETIC DISK USING SUBSTRATE FOR MAGNETIC DISK

• Main Authors: IMAGAWA KIMIE, HATAKEYAMA HIDEYUKI, YONEMITSU MAKOTO, KITAWAKI KOTARO, NAKAMURA TADAHIRO, NAKAYAMA MASARU
• Format: Patent
• Language: English; Japanese
• Published: 19.09.2019
• Subjects: ALLOYS; CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; INFORMATION STORAGE; INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER; METALLURGY; PHYSICS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

To provide a substrate for a magnetic disk having a stable fluttering characteristic, and a method for manufacturing the substrate.SOLUTION: The substrate for a magnetic disk according to the present invention is characterized in that the flatness is 30 μm or less and the difference in the flatness...