50 GB read only memory disc with dual layer structure

Author

Tsukuda, Masahiko ; Ito, Eiichi ; Tomiyama, Morio ; Abe, Shinya ; Furumiya, Shigeru ; Ohno, Eiji

Author_Institution

Storage Media Syst. Dev. Center, Matsushita Electr. Ind. Co. Ltd., Osaka, Japan

fYear

2002

fDate

2002

Firstpage

10

Lastpage

12

Abstract

Recently, a Blu-ray Disc (BD) has been proposed as a rewritable optical disc, in which HDTV digital data can be recorded for two hours or more. It has a capacity of about 25 GB with a size of 120 mm in diameter. It employs a blue laser of 405 nm wavelength and an objective lens with an NA of 0.85 to reproduce through a transparent substrate which is about 0.1 mm-thick. We conducted experiments to study a read only memory (ROM) disc with the same capacity as BD. Then, we confirmed the feasibility of the dual layer ROM disc with density equivalent to 50 GB capacity, which can be read from one side. We report the experimental results on recording of the master and the results of the evaluations.

Keywords

CD-ROMs; high definition television; video recording; 0.1 mm; 120 mm; 2 hr; 25 GB; 405 nm; 50 GB; Blu-ray Disc; HDTV digital data recording; blue laser wavelength; disc capacity; disc size; dual layer ROM disc density; dual layer structure read only memory disc; objective lens NA; rewritable optical disc; transparent substrate; Chemical processes; Disk recording; Lenses; Optical films; Optical recording; Read only memory; Resins; Resists; Structural discs; Substrates;

fLanguage

English

Publisher

ieee

Conference_Titel

Optical Memory and Optical Data Storage Topical Meeting, 2002. International Symposium on

Print_ISBN

0-7803-7379-0

Type

conf

DOI

10.1109/OMODS.2002.1028698

Filename

1028698