Title:
DISK CARTRIDGE
Document Type and Number:
Japanese Patent JP2005259200
Kind Code:
A
Abstract:
To provide a disk cartridge capable of suppressing the warpage of an optical disk medium.
Between a substrate and an optical transmission layer constituting a disk medium 12, expansion factors are different depending on the difference of water absorption due to a difference of thickness. Consequently, warpage becomes a problem in the disk medium 12. However, according to the embodiment, on the disk medium 12 side of an upper shell 24, the disk medium 12 side of a lower shell 26, the disk medium 12 side of a shutter member 18, and the disk medium 12 side of an inner rotor 20, moisture prevention layers 92 (hatched parts) are formed to prevent the moisture of the disk medium 12, thereby preventing the warpage of the disk medium 12.
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Inventors:
KATO SHINICHI
Application Number:
JP2004065969A
Publication Date:
September 22, 2005
Filing Date:
March 09, 2004
Export Citation:
Assignee:
FUJI PHOTO FILM CO LTD
International Classes:
G11B23/03; (IPC1-7): G11B23/03
Attorney, Agent or Firm:
Atsushi Nakajima
Kato Kazunori
Katsuichi Nishimoto
Hiroshi Fukuda
Kato Kazunori
Katsuichi Nishimoto
Hiroshi Fukuda
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