Patent Number: 6,165,581

Title: Magnetic recording medium apparatus

Abstract: In a magnetic recording medium such as a floppy disk, a fatty acid ester compound having at least one side chain group with a molecular weight of 70 or more is added as a lubricant to a non-magnetic under layer or a magnetic recording layer in order to prevent migration of a lubricant to a liner.

Inventors: Sasaki; Futoshi (Miyagi, JP)

Assignee: Sony Corporation

International Classification: G11B 5/72 (20060101); G11B 5/71 (20060101); G11B 5/725 (20060101); G11B 005/82 ()

Expiration Date: 12/26/2017