Hitachi Maxell, Limited

Tomizo Taniguchi

Akira Miyake

Masaya Funahashi

Kunio Mizushima

Hajime Doi

Shoichi Sakamoto

Fujio Matsumoto

Norio Akai

A magnetic disc with good abrasion resistance and improved durability, which comprises a non-magnetic substrate, a magnetic layer comprising a metal magnetic powder formed on one side of the substrate and a coating comprising an inorganic powder having a Mohs hardness of not less than 4 formed on the other, back side of the substrate, which has good abrasion resistance and improved durability.

Magnetic disc

A recording disc cartridge comprising a recording disc containing, at least in its surface layer, at least one compound selected from the group consisting of an aliphatic acid and its salt and derivative, a case in which the recording disc is rotatively contained, and a liner comprising polyester fiber which is interposed between the case and the recording disc with facing the disc, which has good durability and less drop out.

Recording disc cartridge

Growing community of inventors

Kyoto, Japan

Tomizo Taniguchi