Sony Corporation

Yoshihisa Chiba

Hisao Tanaka

Masatsugu Suwabe

Osami Banjo

There is provided a cartridge including a plurality of optical information recording media having unique information recorded thereon, an accommodation body configured to accommodate the plurality of optical information recording media, and an identification device configured to store the unique information of the plurality of optical information recording media and supply the unique information to a changer in a non-contact manner, the identification device being provided in the accommodation body.

Disc cartridge and changer

A recording layer records and stores information and comprises a plurality of layers, namely a first layer and a second layer The first layer is made from a recording material which gives parallel directions to saturation magnetization and sublattice magnetization. The second layer is made from a recording material which gives antiparallel directions to saturation magnetization and sublattice magnetization at room temperature. The recording material for the second layer gives parallel directions to saturation magnetization and sublattice magnetization at around a read temperature.

Growing community of inventors

Miyagi, Japan

Yoshihisa Chiba